Surface finish on plastic composites can vary a great deal, depending on the physical and chemical properties of the polymer blend as well as the parameters of the injection molding process.
The first objective for a custom injection molder is to determine how important the surface finish is for the appearance and/or performance of the final product. For example, does the product need to be eye-catching or simply functional? Depending on the answer, the material selected and the desired finish will determine the settings for the injection molding process, and any required secondary finishing operations. SURFACE FINISH CATEGORIES The Society of Plastics Industry (SPI) standardized surface finishes on injection molding tools. The process used to achieve the finish determines the following grades:
Grade A - Diamond Buffing: Diamond buffing paste has a very fine grain, so finishes are generally very glossy and product surfaces remain flat. Grade A finishes are considered the highest standard.
Grade B - Sandpaper: This semi-gloss finish is applied using sanding grit and is ideal for hiding visible machining marks. The sandpaper grit number provides surface finish control — 600 for the finest finish, 400 for mid-range, and 320 for the most textured finish.
Grade C - Grit Stone: Grit sanding stones generally follow the grit number and finish textures as sandpaper. However, grit stones cut fairly aggressively, which creates a rougher texture compared to B grades.
Grade D - Pressure Blasting: Pressure blasting plastic surfaces with abrasives — typically sand or glass beads — results in non-directional patterns and dull or flat finishes.
Within each grade there are different levels of surface finish, which determines the degree of plastic surface texture. Generally, levels are sequentially numbered within the grades, with 1 being the least amount of texture and higher numbers correlating with more texture. For example, a sandpapered plastic surface finish categorized as a "B1" is semi-gloss and lightly textured; a "B3" is still semi-gloss but has more visual and tactile texture.
Injection molding finishing is an added cost — the higher the grade and finish level, the higher the bottom line. Since it can be a considerable investment, it's important to have an experienced custom injection molder weigh in on the appropriate injection molding surface finish and the most cost-effective tool classification. AESTHETICS VS. FUNCTIONALITY There are functional tradeoffs to be considered. For example, the coefficient of friction and resistance to wear can be affected by the surface finish; if these characteristics are important to product performance, the design team needs to select a material and process that will create a compatible finish. Experienced injection molders have a vast body of scientific data on material chemistry, behavior, and processing conditions to cross-reference for accurate determination of surface finish based on process parameters.
It is critical to determine surface finish during the design stage because it will impact the types of material, tooling, and processing decisions that can be considered. The texture on the tool steel will limit the part surface finish. Sometimes a rougher texture can be used to hide other surface imperfections, such as sink. Surface finish can also affect the draft required on the part — without appropriate draft, the surface finish could be destroyed during ejection. MATERIAL SELECTION CONSIDERATIONS Two key surface characteristics — gloss and roughness — can be impacted by the material selected, additives, and different injection molding parameters such as fill rate, pressure, and temperature. Material type is especially important — for example, higher melt temperatures for products made from reinforced crystalline resins increase gloss and reduce roughness, creating a smoother surface. If reinforced amorphous resins are being injection-molded, however, a higher mold temperature will increase gloss and reduce roughness.
Another important consideration for surface finish is additive compounds that are mixed into the resin. This is where knowledge of material science really comes into play — for example, fiberglass content results in a lower gloss. Other additives like carbon black or mica can reduce surface roughness — these are additives to avoid (or find substitutes for) if a certain surface roughness must be maintained for product function or appearance. Adding particulate fillers may increase surface roughness. Engineers can mix and match the right combination of resins and additives to produce specific surface qualities. INJECTION SPEED & TEMPERATURE Then there’s speed. Faster injection speeds, combined with higher melt or mold temperatures, will further enhance the gloss and smoothness of the surface. In fact, a faster injection speed always improves gloss and smoothness, regardless of the other production parameters that have been determined. For any reinforced composite, the fast injection speed combined with high melt and tool temperatures will always provide the glossiest and smoothest part (although a slow injection speed, combined with cooler tool and melt temperatures, may meet other product specifications, they will typically result in a poor surface texture). Quick filling of the tool cavity can help minimize fiber orientation, making the weld line less visible and boosting the aesthetic quality of the product.
Basically Plastic injection molding is the preferred process for manufacturing plastic parts. Plastic has the advantageous features like high malleability, cheap in cost, high stability. So it is being used pervasively in molding. As we know, molding is a process of manufacturing by which liquid or pliable new material get a rigid
shape called a mold. Plastic molding is a process where plastic is molded into the desired shape.
Injection molding is used to create many things such as electronic housings, containers, bottle caps, automotive interiors, medical parts and most other plastic products available today. Some advantages of injection molding are high tolerance precision, repeatability, large material selection, low labor cost, minimal scrap losses, and little need to finish parts after molding.
For manufacturing of plastic injections, There are various types of raw materials such as thermosetting plastic, elastomers and thermoplastic polymers (resins) etc are used for manufacturing of plastic injections as these materials have a greater viscosity. The plastic injection machines have basic component parts such as material hopper, heating unit, plunger etc. The plastic is melted in the injection molding machine and then injected into the mold, where it cools and solidifies into the final part.
Enmould is an experienced plastic injection mould supplier equipped with updated modern technologies. It offers product with ensured quality. So contact us for getting the exact molding solution you want in an affordable price.Our service will turn out to be fitting and cost-effective for you!
The headlight housing is part of the headlight base and wiring harness before installation. It belongs to the internal functional components, and the external components have many assembly dimensions. The lamp holder has high precision and the installation harness has a large size.
The lamp mold is part of the headlight lamp cover part, the material is PP+TD20, wherein PP (polypropylene) is the base of the lampshade, and TD20 means adding 20% talcum powder to the material to improve the rigidity of the lampshade. This part is not the appearance part, but the internal function. The average wall thickness of the plastic parts is 3.00 mm, and the maximum size of the plastic parts is 320.9*228.4*344.3 mm. The characteristics of plastic parts are as follows:
1. The plastic part is an internal functional part, and the lamp cap hole and the back cover hole have many assembly dimensions and high precision.
2. No spot is allowed on the surface of plastic parts. Defects such as shrinkage holes, weld marks and burrs are not allowed.
3. The shape of the plastic parts is complicated and the parting surface is complicated.
4. In addition to the asymmetrical aperture of the lamp head, the left and right lamp housings are asymmetrical.
5. There are two inverted buckles on the outside of the plastic parts, and the parting surface is complicated.
Since the lamp mold is a large mold, the parting surface is complicated, and the mold part and the template adopt an integrated structure, that is, the fixed mold a plate is a fixed mold forming part, and the moving mold B is a moving mold forming part. The structure has the advantages of compact structure, high strength, good rigidity, small mold volume, and avoids complicated procedures such as opening a frame, arranging a frame, and manufacturing a groove.
Since the plastic parts are PP+TD30 and no parts are present, the fixed and movable mold steels can be P20 or 718.
Since the push mechanism is on the movable mold side, the plastic parts must be held on the movable mold side after the mold is opened. Due to the complex shape of the plastic parts, the plastic parts may stick to the fixed mold after the mold is opened. Therefore, when designing a lamp mold, it is necessary to prevent the occurrence of a fixed mold phenomenon. The specific measure is to design the ribs and the reverse buckle type on the side cylinder of the movable mold to the area where the plastic parts are strongly stressed. If it is still fixed, design a buckle on the push rod to keep the molded part on the side of the movable mold.
Pay attention to the design of the lamp holder during design. The left and right of the lamp hole is a translational relationship, not a mirror relationship. This is one of the mistakes that lamp mold designers can easily make. Pay attention to the dimensional accuracy of the lamp cap hole. The ventilation angle must be within 0.5°, otherwise it will affect the installation of the lamp holder. The lamp housing plastic part has a plurality of ribs, and the boss has a plurality of columns. There are many fixed, movable molds that are inserted into the injection mold and push tube. Fixed and mobile mold inserts should be positioned with a mushroom head to tilt. Screw as far as possible from the front and copper at the bond.
In other respects, the design of the injection molded part should pay attention to the insertion angle. In the design of automobile molds, in order to improve the service life of the mold and avoid the insertion position of plastic parts, all the insertion positions are designed to be more than 7 degrees.
ok molding has more than 20 years experience in plastic injection molding and mold making.To learn more about our manufacturing capabilities and discover what makes us different, please visit our website: :okmolding.com . If you’re ready to jump into your next project with us, request a quote . No matter your need,contact us today so we can help your business .
From small gears and kids’ toys to auto parts and medical parts, plastic injection molding is used to make a variety of consumer products. It’s a highly effective, and efficient, way to produce large volumes of plastic products. After creating a mold, manufacturing companies can use it to produce countless products in that same size and shape. But what exactly is plastic injection molding?
Plastic injection molding is a molding process characterized by the use of thermoplastics. Plastic injection molding specifically uses thermoplastic as the raw material that’s poured into a mold.While it has undergone numerous improvements and changes since, plastic injection molding has origins dating back to the 19th century. In 1872, brothers John and Isaiah Wyatt patented the first injection molding machine, which they used to inject heated plastic into a mold.
Also known as thermosoftening plastics, thermoplastics are polymer materials that temporarily become softer and more pliable when exposed to heat. During plastic injection molding, thermoplastic material is heated until it turns from a solid state to a liquid state, at which point it’s poured into the mold.
Thermoplastics are ideal for injection molding because of their ability to become pliable when exposed to heat. Furthermore, excess thermoplastic material can be easily recycled, thereby reducing waste for manufacturing companies. How Plastic Injection Molding Is Performed
Before plastic injection molding can be performed, a mold must first be created. Common materials used to make molds for plastic injection molding include stainless steel, high-carbon steel and aluminum. For high-volume applications, though, steel is preferred because of its superior strength and resistant to wear than that of aluminum. Steel molds can easily last for hundreds of thousands of applications, making them a cost-effective solution for manufacturing companies that produce large volumes of plastic products.
can be performed, a mold must first be created. Common materials used to make molds for plastic injection molding include stainless steel, high-carbon steel and aluminum. For high-volume applications, though, steel is preferred because of its superior strength and resistant to wear than that of aluminum. Steel molds can easily last for hundreds of thousands of applications, making them a cost-effective solution for manufacturing companies that produce large volumes of plastic products.
Once the mold has been created, thermoplastic material in the form of small pellets are fed into a large drum-like barrel where they are heated and pushed sideways towards the mold. As the injection molding machine’s screw pushes the liquefied material, the material eventually reaches a nozzle that further pressurizes and pushes the thermoplastic material into the mold.
Next, the liquified thermoplastic material is cooled — typically at room temperature — until it hardens. Depending on the type of injection molding machine used, it may feature a platen that opens after the material has cooled, allowing for the removal of the newly created plastic product.
ok molding has more than 20 years experience in plastic injection molding and mold making.To learn more about our manufacturing capabilities and discover what makes us different, please visit our website: :okmolding.com . If you’re ready to jump into your next project with us, request a quote . No matter your need,contact us today so we can help your business .
Does your company need custom made plastic injection molds to produce plastic parts at low cost and within the shortest possible time? Are you seeking for finely finished injection molds with greater strength to continue with production of prototype parts or functional testing? We can lead you to ultimate satisfaction with its best in quality plastic injection molds and custom plastic parts molding tool. We are a professional plastic injection mold manufacturing company engaged in custom injection mold service and capable to meet the production needs of customer’s plastic parts no matter whether they are 100 or more than 100,000 in number. It requires greatly finished plastic injection molds for your company to create parts of more difficult shapes and sizes that would often be costly and time taking to manufacture with machine. Our plastic injection mold is accomplished to exact specification of customers and delivered with both quality and speed.
Our injection molds are not just personalized to customer’s individual requirement but are also available with lifetime warranty. Using the most effective mold frame library system we strive to keep our molding and tooling cost low so that we can serve you 30% – 50% lower than other molding shops and provide long lasting molds too. With us you can have the pleasure of producing your plastic parts in quality molds with lifetime warranty and save yourself from spending anything extra on your new injection mold tooling. Be sure to use our injection molds and create a large number of parts with the same mold and earn about 30-50% savings on your molding price. It is only possible because of our injection molding tool which is very economic and keep your plastic parts production price at the minimum while sticking to your budget.
Jingwei industry is specialized in plastic injection molding tools has worked for many large and small scale companies in Asia, America, Australia, Europe and South America. We operate globally and ever ready to serve you with custom and cost-effective injection mold service no matter you are associated with food, electronics, sports, automobile, medical, beverage or container manufacturing or packaging industry.
For low-cost, effective and quick production of plastic parts, consider using plastic injection mold service by Jingwei industry . We will deliver you instant injection mold quote which will let you see the price of your own injection molds and the 3D model of plastic parts to be produced out of them.Email:info@jweimolding.com
One of the major innovations of the past century has been the introduction and wide adoption of plastics for many day-to-day applications that previously relied on traditional materials like metal, glass, or cotton. Plastics have revolutionized many industries for a number of different reasons to include the fact that they resist environmental degradation over time, are generally safe for human beings, are economical and widely available, and are produced with a wide variety of material properties that allow adaptation to many different applications. Here is our list of the top 11 plastics the modern world simply cannot do without:
Polyethylene terephthalate (PETE or PET):
PET is the most widely produced plastic in the world. It is used predominantly as a fiber (known by the trade name “polyester”) and for bottling or packaging. For example, PET is the plastic used for bottled water and is highly recyclable.
Three words or short phrases to describe the major benefits of Polyethylene relative to other plastics and materials would be:
Wide applications as a fiber (“polyester”) Extremely effective moisture barrier Shatterproof
2,Acetal (Polyoxymethylene, POM):
Acetal is a very high tensile strength plastic with significant creep resistant properties that bridge the material properties gap between most plastics and metals. It is known for high resistance to heat, abrasion, water, and chemical compounds. Additionally, Acetal has a particularly low coefficient of friction which combined with its other characteristics makes it very useful for applications that utilize gears.
Two words or short phrases to describe the major benefits of Acrylic relative to other plastics and materials would be:
Transparent Scratch Resistant 3,Polyvinyl Chloride (PVC):
Polyvinyl Chloride is perhaps most well known for its use in residential and commercial property construction applications. Different types of PVC are used for plumbing, insulation of electrical wires, and “vinyl” siding. In the construction business PVC pipe is often referred to by the term “schedule 40” which indicates the thickness of the pipe relative to its length.
Three words or short phrases to describe the major benefits of PVC relative to other plastics and materials would be:
Brittle Rigid (although different PVC variants are actually designed to be very flexible) Strong 4,Polypropylene (PP):
Polypropylene is used in a variety of applications to include packaging for consumer products, plastic parts for the automotive industry, special devices like living hinges, and textiles. It is semi-transparent, has a low-friction surface, doesn’t react well with liquids, is easily repaired from damage and has good electrical resistance (i.e. it is a good electrical insulator). Perhaps most importantly, polypropylene is adaptable to a variety of manufacturing techniques which makes it one of the most commonly produced and highly demanded plastics on the market.
Two short phrases to describe the major benefits of Polypropylene relative to other plastics and materials would be:
Unique Use For Living Hinges Simple To Manufacture 5,Polystyrene (PS):
Polystyrene is used widely in packaging under the trade name “styrofoam.” It is also available as a naturally transparent solid commonly used for consumer products like soft drink lids or medical devices like test tubes or petri dishes.
One short phrase to describe the major benefits of Polystyrene relative to other plastics and materials would be:
Foam Applications 6,Polyethylene (PE):
There are a number of different variants of polyethylene. Low and high density polyethylene (LDPE and HDPE respectively) are the two most common and the material properties vary across the different variants.
LDPE: LDPE is the plastic used for plastic bags in grocery stores. It has high ductility but low tensile strength. HDPE: A stiff plastic used for more robust plastic packaging like laundry detergent containers as well as for construction applications or trash bins. UHMW: Extremely strong plastic that can rival or even exceed steel in strength and is used is for applications like medical devices (e.g. artificial hips). 7,Polycarbonate (PC):
Polycarbonate is a transparent material known for its particularly high impact strength relative to other plastics. It is used in greenhouses where high transmissivity and high strength are both required or in riot gear for police.
Two words or short phrases to describe the major benefits of Polycarbonate relative to other plastics and materials would be:
Transparent High Strength 8,Acrylic (PMMA):
Acrylic is best known for its use in optical devices. It is extremely transparent, scratch resistant, and much less susceptible to damaging human skin or eye tissue if it fails (e.g. shatters) in close proximity to sensitive tissue.
Two words or short phrases to describe the major benefits of Acrylic relative to other plastics and materials would be:
Transparent Scratch Resistant 9,ABS (Acrylonitrile Butadiene Styrene):
ABS has a strong resistance to corrosive chemicals and physical impacts. It is very easy to machine, is readily available and has a low melting temperature making it particularly simple to use in injection molding manufacturing processes or 3D printing.
Four short phrases to describe the major benefits of ABS relative to other plastics and materials would be:
Impact Resistant Readily Available Simple To Manufacture 10,Acetal (Polyoxymethylene, POM):
Acetal is a very high tensile strength plastic with significant creep resistant properties that bridge the material properties gap between most plastics and metals. It is known for high resistance to heat, abrasion, water, and chemical compounds. Additionally, Acetal has a particularly low coefficient of friction which combined with its other characteristics makes it very useful for applications that utilize gears.
Two short phrases to describe the major benefits of Nylon relative to other plastics and materials would be:
High Strength Temperature Resistant 11,Polylactic Acid (PLA):
Polylactic Acid is unique in relation to the other plastics on this list in that it is derived from biomass rather than petroleum. Accordingly it biodegrades much quicker than traditional plastic materials.
Two words or short phrases to describe the major benefits of Polylactic Acid relative to other plastics and materials would be:
Biodegradable
DIY 3D Printing (compare PLA to ABS)
No matter what the application is there are different plastics with the right material properties to suit the requirements.Jingwei molding has more than 15 years experience in plastic injection molding and mold making. Your High Volume, Custom Plastic Parts Injection Molding Specialist. To learn more about our manufacturing capabilities and discover what makes us different, please visit our website: :jweimolding.com . If you're ready to jump into your next project with us, request a quote . No matter your need, contact us today so we can help your business face all of the changes and challenges of today's competitive marketplace.
Are you considering injection molding for the production of a current or upcoming plastic parts project? If so, you came to the right place. Injection molding is the ideal process for the production of a wide range of complex plastic components, and can benefit OEMs across many different industries. It’s consistent, affordable, and creates durable, high-quality plastic parts that can withstand just about any environment.
To understand how injection molding can really help today’s manufacturers, here are the top 15 benefits to utilizing the process : 1. ABILITY TO PRODUCE DETAIL/COMPLEX GEOMETRY With the right tool design and a scientific molding approach to process optimization, injection molding can help manufacturers produce highly complex, detailed plastic parts. 2. HIGH-OUTPUT PRODUCTION If you need to produce a large run of a single part/component, the injection molding process is ideal, as it ensures a consistent, repeatable design due to all parts being created from the same mold. 3. COLOR CONTROL From clear to magenta, whatever color you need your plastic to be, injection molders can make it happen—even including multiple colors in one product when two-shot or overmolding processes are used. 4. FINAL FINISHES Does your plastic part require a smooth finished appearance? Most parts come out of the mold with a smooth surface finish very close to their final look. Even if you aren’t going for a smooth appearance, you’re still in luck, as injection molding allows for many surface finishes that don’t require secondary operations. From matte finishes and unique textures to engraving, injection molding can provide the desired plastic parts you’re looking for. 5. COST SAVINGS There are several ways that injection molding can help OEMs experience lower costs, from plastic part consolidation to overmolding. However, the number one way the process leads to low-cost outcomes is by significantly reducing the number of problems in, or increasing the moldability of, the part design before production starts—minimizing the need for expensive tooling changes down the road. 6. PRECISION For OEMs with complex part designs requiring tight tolerances, injection molders can achieve designs accurate to within +/- .001 inches. 7. EFFICIENCY If you partner with a sophisticated injection molder, you’ll be working with a team that likely has decades of experience under their belts. This means they know exactly how to optimize design and manufacture your components in the most efficient way possible, and focus on the design upfront to minimize problems down the road. 8. STRENGTH The strength and durability of plastics has greatly increased over the years, and today’s lightweight thermoplastics can withstand even the most rugged environments. There are many types of engineering grade plastic to choose from, allowing OEMs to find exactly the right options for their applications. 9. PRODUCT DEVELOPMENT TIMELINE From upfront design support to mold flow analysis software, injection molding can help OEMs achieve a shorter product development timeline, in turn speeding time to market. 10. ABILITY TO SIMULTANEOUSLY USE MULTIPLE TYPES OF PLASTIC It’s not uncommon for complex part designs to require components made of different materials. Plastics expertise from the molder’s project engineers can help ensure that different polymers are compatible under all conditions to help reduce defects. 11. PRODUCT/PART CONSISTENCY The production of plastic components for critical-use applications requires a consistent, repeatable process to achieve complex designs with tight tolerances. Injection molding helps ensure a consistent quality by repeatedly using the same mold for each part, and using scientific molding sensors to monitor the activity inside the mold. 12. FLEXIBILITY Injection molding is all about flexibility. Whether we’re talking about the plastic properties themselves or your ability to be flexible in your color choices and material selection, injection molding gives OEMs lots of freedom with their design choices — especially when compared to metal. 13. LOW LABOR COSTS Much of the injection molding process is automated by machines and robots, and controlled by a sole operator or mold technician. This keeps labor costs to a minimum and passes on savings to the customer. 14. LIGHT WEIGHTING From the automotive industry to military applications, many OEMs are turning to plastic to help reduce the weight of their products. Today, high-strength, lightweight thermoplastics can be used to replace metal components with virtually no difference in strength or dependability. 15. REDUCED WASTE Using plastic regrind can even help OEMs save on money and materials.
Jingwei molding has more than 15 years experience in plastic injection molding and mold making. Your High Volume, Custom Plastic Parts Injection Molding Specialist.Any questions,please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com
Today,We put together a list of the 15 more commonly used terms to know when discussing plastic injection molding, mold parts, machinery, materials, and problems. We hope you find this to be a useful resource.
Injection Molding Terms: Mold:
A hollow form often made from stainless steel that plastic is injected or inserted into to manufacture a plastic part. Molds can be expensive to design and manufacture because of this they are typically only used in mass production. As one of the most significant production investments, it is critical that the molds are made with a great deal of accuracy. Tight-tolerance, precision molds that are made from the best steel available should last for years to come. Resin:
Resin is the raw material used to create the finished part in the plastic injection molding process. With hundreds of commodity and engineering resins available on today’s market, the material selection process for plastic injection molding may seem daunting at first, so research your options carefully, and consult with an experienced plastic injection molder to help determine the ideal choice. Mold Cavity:
The hole in the mold that is in the shape of the desired part, this is where the plastic resin is injected into to make the part. Fewer cavities in a mold require less tooling work, time and ultimately less cost. A reputable, experienced molder will be able to maximize cavitation in the mold to maintain the highest level of productivity. In general, most molders recommend creating one mold per part versus creating a family mold. Family molds are created with various cavities for different parts. They tend to produce inferior products and have more downtime due to maintenance issues.
Colorant:
A pigment system, usually in pelletized form, or liquid, which is mixed with resin to produce the desired color. To pinpoint the desired color for each plastic product or part, a color matching process must be completed, which allows engineers to develop a specific color concentrate for a particular application. Typically, a chip, plaque, or Pantone number provides an approximate idea of the desired hue, and information about the specific polymer being used helps to determine the formulation for the color concentrate.
Wall Thickness:
Of all the various design aspects, wall thickness has the most significant impact on the cost, production speed, and final quality of a part. Wall thicknesses are not subject to any restrictions, but generally, the goal is to create the thinnest wall possible while taking into account the part’s structural requirements and overall size and geometry. The flow behavior and material qualities of the resin should also be considered. Uniform wall thickness also allows for the most efficient, uniform flow of resin through a tool for ideal processing. Variations in wall thickness cause molten polymers to take preferential flows, leading to air trapping, unbalanced filling, and weld lines. Hopper and Barrel:
The hopper stores the plastic to be used in the injection molding process. For materials such as Nylon, ABS, and PET, a dryer unit may be added to dry the plastic for processing and to keep any external moisture away from the material. The hopper may also contain small magnets to prevent any harmful metallic particles from entering the machine. The plastic that is placed in the hopper is usually in some type of granular form. The plastic material is then melted using heater bands and is then injected through the nozzle into a mold cavity. The pellets are fed from the hopper to the barrel where the material is then melted in a controlled fashion and injected into the mold in the machine. Flash and Burrs:
Sometimes known as burrs, flash is the occurrence of thin, wafer-like protrusions on a finished part caused when melted resin escapes the mold cavity. Most common along the parting line or an ejector pin, flash can be caused by excessive injection speed or pressure, in which case the fix is a simple reduction. More often flash is due to poorly designed or severely degraded molds, in which case a redesign or retooling is required. Flash can also be caused by too high of a mold temperature and excessive barrel heat. Runner System:
The channel system that allows the flow of the melted material to fill the part cavities. There are two main categories: hot runner and cold runner systems. Each of these systems has its benefits and limitations which make them better suited for specific applications. Understanding the differences between these technologies can help you have a more productive and informed discussion with your plastic injection specialist to determine the most feasible option for your unique application. Hydraulic Process:
Hydraulic is the predominant type of process used in plastic injection molding. These types of machines employ hydraulic cylinders to clamp together two halves of a mold at high pressure. Plastic substrate pellets are then melted, and the liquid is injected into the mold cavity. Once the plastic has cooled and hardened, the mold halves are separated, the part is extracted, and the process is repeated. The hydraulic process uses a hydraulic press which is not as precise as electric presses. Electric Process:
All-electric presses were introduced in 1983. The newer all-electric press technology is quieter to operate, faster and have higher accuracy. These machines are powered by digitally controlled high-speed servo motors rather than hydraulics, allowing for a faster, repeatable, more precise, and energy-efficient operation. Electric machine operation is highly predictable, so once a desirable injection process has been reached, it can be replicated very consistently, resulting in higher quality parts. The machinery required for the all-electric process is more expensive than the hydraulic process. Hybrid Process:
Combining the best of both worlds, hybrid injection molding machines have been on the market for a few decades now, and combine the superior clamping force of hydraulic machines with the precision, repeatability, energy savings, and reduced noise of electric machines. This allows for better performance for both thin- and thick-walled parts. These machines have become increasingly popular over the last few years due to their efficiency and ease of use. End-of-Arm Tooling:
Speed and efficiency in plastic injection molding equate to cost savings. So, it is no surprise that robots play a significant role in improving the manufacturing process. From simple sprue pickers to complex automated End-of-Arm Tooling (EOAT), the industry is taking advantage of this technology. The EOAT is often assembled along with the electronics, pneumatics, and sensors needed to meet the specific processing requirements of the job. Tonnage:
Presses are rated, or classified, based on tonnage, which indicates how much clamping pressure a particular machine can offer. Press tonnage, or force, can range from less than 5 tons to over 4,000 tons. The higher a machines tonnage is rated, the larger it is. Pressure keeps a mold closed during the injection process; too little can compromise quality and result in flashing — the appearance of excess material on the part edge. To determine the appropriate size press for your application, consider the following key variables such as material choice, size of the part and press rating.
Bring Your Custom plastic injection mold/molding Project to The JW industry ,we have access to resources that help reduce production costs even further. We proudly offer a total concept solution from design and tooling to material selection, production, and fulfillment .Contact us today to request a free quote and find out how our industry experience and expertise will benefit you with your next project.
Even though metal-to-plastic conversion has been around since the 1950s, many manufacturers are still not familiar with all the benefits it provides.
Automotive and aerospace companies have been most active in converting existing metal products or parts to plastic, driven by the need to reduce weight and improve fuel efficiency. With proper design, engineered plastics can be just as strong as metal. They can also be more chemical-resistant with exceptional heat resistance, making them good choices for fuel systems, fluid handling systems, and other high-temperature applications. Plastics that are engineered to be thermally and electrically conductive can be used as EMI/RFI shields, or in automotive electronics.
Benefits that conversion to plastic can provide are:
Reduced part weight
High tensile strength with proper structural design Highly repeatable in processing (less scrap) Lower manufacturing costs Enhanced regulatory compliance Greater design flexibility (part consolidation) Lower packaging and shipping costs Up to six times longer tool life. Current metal-to-plastic trends focus on reducing weight, improving strength and corrosion resistance, and consolidating multiple metal parts into one plastic part. Plastic parts can be just as tough as metal parts and achieve the same tight tolerances, with fewer secondary operations. In general, companies can expect to achieve an overall cost savings of 25% to 50% by converting to plastic parts.
Jingwei molding has more than 15 years experience in plastic injection molding and mold making. Any questions,please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com
Products are available in high temperature resin systems with carbon fiber reinforcement loadings from 20-40% to provide performance options that meet a broad range of requirements for demanding applications in energy, industrial, aerospace, automotive, and medical markets that previously required aluminum, zinc, and magnesium metals.
Manufactured using advanced compounding techniques that maximize fiber integrity; Ultra Performance Structural Compounds from JW Company achieve strength and stiffness properties that are higher than previously available products. Combining the higher mechanical properties and lower densities of carbon fiber with the excellent thermal and chemical resistance provided by using high temperature resin systems allows these injection moldable thermoplastic materials to close the performance gap between plastics and metals.Global custom engineered thermoplastics compounder JW Company has elevated the mechanical properties of its industry-leading portfolio of high temperature structural products to include new “ultra performance” compounds based on carbon fiber reinforced PEEK, PPA, PPS, and PEI resin systems to create the highest performing thermoplastic products available.
Injection moldable materials with this kind of performance are groundbreaking in their ability to open up new opportunities for using thermoplastics. We achieved this elevated performance by drawing upon JW Company’s knowledge and expertise in compounding high temperature polymers and fiber reinforcements to engineer a platform of products that raise the capabilities of thermoplastic compounds to new levels.
With higher strength and stiffness values along with improved impact and fatigue resistance, these materials provide across the board performance improvements that will give product designers added confidence when specifying Ultra Performance Structural Compounds to replace traditional materials.These high temperature polymers combine excellent chemical resistance with very high strength and stiffness making them the premier choice for energy exploration, industrial fluid handling, and other applications that are exposed to harsh service environments.
In addition to structural characteristics, JW Company can incorporate other capabilities during compounding, such as wear and friction resistance at high pressure/velocity ratios without needing external lubricants. PEEK, PEI, and PPS materials are inherently flame retardant and often chosen for their low burning toxicity, but flame retardants can also be added to PPA to increase product safety.
Ultra Performance Structural Compounds and all other products from JW Company are available and supported from design through finished part production.Jingwei molding has more than 15 years experience in plastic injection molding and mold making. Any questions,please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com
Plastic part design is important for many modern industries today. Today’s heavily technological society has made some aspects of plastic part design more challenging in certain respects.
For one thing, the market changes very rapidly in a highly technological society like this one. This means that goods of all kinds need to be produced quickly and channeled into the marketplace rapidly. As such, the professionals involved with the design stage of all products will have to work even more efficiently and quickly. While speed and efficiency have always been valued in the world of manufacturing, the market changes quickly enough these days that many of these traits are even more important now. The modern world of information technology has obviously increased the demand for many plastic parts as well. When people look at their laptops, smartphones, and other devices, they should consider the amount of plastic that went into making them in the first place. A typical smartphone handset will be made from a wide range of materials, but about 40% of it will be plastic. It’s true that in a heavily technological society, the market moves quickly in general. However, this effect is particularly pronounced with regards to smartphones and similar devices. People will want to upgrade their devices very frequently these days. There’s a lot of pressure on most companies to produce new and advanced devices constantly. This means that designers and other people involved in the manufacturing process will have to work quickly and constantly come up with new and creative ideas. The design of the individual plastic parts that people will encounter when looking at their devices will also vary, even if those plastic parts look relatively similar. The fact that the specific plastic parts will only partly vary from one device to another actually makes the design process more difficult in some ways. Making these parts both unique and effective requires very careful engineering. The aesthetics of many modern plastic parts will also be important. People spend so much time handling their devices that they absolutely want them to look nice. They want devices that are made with smooth plastic parts that will be easy to handle for long periods of time during the day. However, people seem to have the same standards for plastic parts all throughout many modern industries. When people compare modern plastic products with historical plastic products, it seems that many of the modern versions really have been created with a particularly high degree of care. The tools used in plastic injection molding have certainly improved over the course of the last several decades. As such, it’s actually possible to create much more intricate and appealing designs in the modern world. Modern plastic injection molding firms will have access to these modern tools, and they can use them to create excellent plastic parts that were designed according to a very exacting set of standards. Plastic parts are used everywhere today. It’s essential to work with plastic injection molding firms in order to receive a high-quality plastic part design since all of these trends won’t change any time soon. Jingwei molding has more than 15 years experience in plastic injection molding and mold making. Your High Volume, Custom Plastic Parts Injection Molding Specialist.Any questions,please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com
Going back as far as the 50s, plastic part manufacturing has become increasingly common. It has even, in some cases, exceeded metal manufacturing. However, even now, over half a century later, many manufacturers are still not really aware of the benefits of choosing plastic parts that they can’t get from using metal parts. Plastic isn’t only extremely durable and extremely reliable; it is also far cheaper than metal. It can save you quite a lot of money in construction costs. This is due to the far lower cost of making plastic parts in comparison to metal ones. If you want to know more about the benefits of choosing plastic parts over metal ones then you are in the right place to find out. The following five reasons are some of the best justifications for choosing plastic parts over those built out of metal. 1. Plastic can be Recycled
Another benefit of choosing plastic is that it can be recycled. Most other materials that can be used to make parts are either impossible or far too expensive to realistically recycle. This gives plastic a unique advantage, as it means that when your plastic parts are no longer needed, they can simply be recycled into something else; unlike most other materials, which you will be forced to throw away since they are either impossible or too expensive to recycle. Because you probably also have plastic materials on hand already, this can save you in material costs. Thus, your existing materials can be recycled into new parts. Not only that, but it can also cut down on how long it takes you to get new materials. 2. Plastic Has a Longer Lifespan
Plastic is also a good deal more durable than metal or any other kind of material, and will be subjected to much less wear and tear than what would be experienced with the use of other materials. Not only will your plastic parts be able to last for years and years which will allow you to avoid having to make time-consuming and expensive replacements and repairs since the long-lasting nature of the parts will make them much more durable than any other type of material could possibly make those same parts. 3. Plastic is the Safer Option of the Two
Working with metal parts of any kind, there is always some risk of injury from, for example, the sharp bits. Plastic parts do not possess this risk factor thanks to their lightweight design and smooth edges. If you are installing plastic, whether it is small or large parts, then you don’t have to worry about things like injuries from sharp edges and the like as you would if you were installing metal parts instead. 4. Design and Increased Size Flexibility
Plastic offers you a greatly increased form of flexibility that metal is simply not capable of matching. Say you want to have a wider variety of different options available to you. (For instance: what size your parts can be, exactly how they can be designed, etc.) Then plastic is a far better option than metal. Plastic is a good deal more flexible; it offers you a significantly wider range of options. That’s because plastic can be molded into a wider range of different shapes and designs than metal can.
Jingwei molding has more than 15 years experience in plastic injection molding and mold making. Any questions,please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com
Plastic injection molding is used for everything from homeware to industrial parts . Injection-molded plastic parts prove their worth whether you’re designing a new product, or even a single component in a complex assembly. On the positive side, the injection molding process ensures quality and uniformity. However, tooling a mold is expensive, and small errors can have big consequences. Here are some tips Jingwei industry has gleaned from decades’ worth of experience helping our clients get it right. Keep it Simple The simpler your part design, the better. Keep in mind, however, that what seems elegant on the drawing board, or in a CAD program, may not work as well in the real world. Embrace Uniformity Uniformity of wall thicknesses in an injection-molded part or product ensures optimal flow during the molding process. This, in turn, leads to a consistent product. We will help you determine proper thickness to optimize product quality. Avoid the Sink Sink is a phenomenon whereby the plastic shrinks as it cools and does not cool evenly as it sets. If one area cools more slowly than the rest, you’ll notice warping and indentations. Using a thinner wall size, as well as proper sizing and placement of functional elements like ribs and ramps will minimize the possibility of this occurring. Transition Properly To begin with, design your mold so the plastic flows from thick to thin. If you have a section where the wall thickness tapers off, the tapered end should be farther from the injection site to ensure uniform quality. You should also learn to love curves. Sharp corners and transitions mean stress that’s literally built into your parts. This can mean warping, deformation, and premature wear. Using smooth radii and carefully working draft angles into your parts will ensure a better molding process and parts that are more durable. Understand Your DFM DFM, or Design for Manufacturing, reports are how the manufacturer highlights potential concerns with the molding process. There are times when the mechanics of injection molding can cause function issues with your product. Our goal is to identify, and help you address these issues before the mold is tooled.
The points listed above are only one facet of a larger process. If you’re in the early stages of designing and prototyping a product, you will also need to consider the types of plastic used, the scale of your production run, and whether plastic injection molding will be right for your project. When it comes to getting a handle on the process as a whole — from initial prototype to return on investment — Jingwei industry brings to each client and each project proves its worth. Take time to contact us for a free quote and be sure to ask us about our free offer.
The Jingwei Industry has been building stainless steel molds for plastic injection molding projects for over 15 years, and we continue to work closely with every client to ensure high value and top-quality results. To learn more about our custom tool making and high-volume injection molding capabilities, please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com .
The key to a successful and precision part depends on the quality of its mold, but building a reliable, long-lasting mold can take a considerable amount of time — and requires a great deal of accuracy. Also, molds are often one the largest capital investments in a project, so it’s critical that tooling is built right the first time around. This is particularly important in high-volume injection molding projects, where molds can be extremely complex.
Below are some important factors to keep in mind when building a mold to ensure optimal quality and reliability. What Makes a Good Mold? A high-quality, precision-engineered mold that is built to last can be an excellent investment for your company. The best plastic injection molds feature all of the following characteristics:
Good design and engineering
High-quality stainless steel mold bases and cavities for optimal performance and durability
Manufactured on modern equipment with the capability for precise machining
Accurately crafted with attention to high standards and tight tolerances
How Does Our Factory Make Molds? To create a mold, we reverse engineer a design from a supplied part or create a mold based on the customer’s drawing or CAD file. To craft the tool, the team then utilizes EDM equipment, CNC mills, lathes, and grinding machinery. Many of our designers started out as toolmakers, so they fully understand the intricacies of the process, from start to finish. Custom Mold Making With Jingwei Industry The Jingwei Industry has been building stainless steel molds for plastic injection molding projects for over 15 years, and we continue to work closely with every client to ensure high value and top-quality results. To learn more about our custom tool making and high-volume injection molding capabilities, please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com
Electronics have come a long way in the past few decades, plastic play important roles in the electronic industry. In many ways, plastic and electronics work hand in hand to produce the gadgets we have available today.
Plastics Are Often Present In Electronics.Plastic protects and insulates electronic products. Many electronics, from laptops to stopwatches, benefit from the protection of hard plastic electronics enclosures. In addition, plastic electronic components are very common in printers, handheld games, telephones, calculators, alarm clocks, and other electronic devices.
Insulation Electronics are usually delicate and sensitive to water and harsh environments. Plastic enclosures protect the electronics parts from harmful elements. They also keep electrical currents from escaping, which helps to protect the user. Electric devices that plug into wall sockets, such as blenders and hair dryers, are encased in plastic for this reason.
Light Weight When it comes to plastic electronics enclosures, the material is relatively light in weight for the durability and protection it provides. With electronics like laptop and smart phones, it is generally thought that sleeker and lighter is better. Plastic is the ideal material that can help accomplish this while still maintaining durability.
Less Waste Because plastic goes into a mold, there is not much need for cutting off excess material. The mold predetermines the amount of plastic that will be needed. Other materials often need to be cut and fitted to get the right size and shape. Less waste means it is less expensive to produce.
Design Flexibility It is often much easier and cheaper to produce a plastic electronic component into the perfect shape than it is with any other material. With injection molded plastic electronic components, the shape and size of the parts are almost limitless. It is possible to make one part where it took many pieces bonded together of metal or other materials. Each bond made the part weaker and more expensive to make. Using plastic drastically reduces the cost and increases the durability.
Custom Design With technology that allows us to create molds of many shapes and sizes, we can create the tiniest details to the exact specification of the designer. This makes many ideas that were never before possible a reality. For example, without microchip molding, many of the technologies we depend on would not exist. Manufacturers are also incorporating designs and logos to their products that were expensive or impractical before.
Through plastic parts, enclosures, and microchip molding, plastic has helped the electronic industry reach new goals. Without plastic injection molding, electronics would not be mass produced like they are today. Plastics keep electronics evolving by making them practical and economical.
Jingwei industry has served the electronic industry for years develop and manufacture parts and has a team dedicated to providing you with the most cost effective solutions for design and manufacturing injection molded plastic electronic parts . visit us at :jweimolding.com Or contact us via info@jweimolding.comfor your project.
The Importance of Thermoplastics To Product Development & Material Efficiency：When it comes to plastic prototype development or plastic product manufacturing, it is useful to understand which material to use. Typically, there are two types of plastic materials: thermoplastic and thermosetting resin.
To make a long story short, thermoplastic materials can be melted, cured (cooled down such that they become solid), melted again, cured again, and so forth. There is a limit to the number of times this process can be repeated depending on the particulars of the given material but the point is that thermoplastic materials can be melted multiple times without significantly degrading the material.
Thermoset materials, by contrast can only be melted once. After a thermoset material cures, attempting to heat it again to its melting point would cause it to burn (rather than melt) the material. It is useful to think of a 2-part epoxy when trying to understand thermoset plastics. An epoxy, like a thermoset material, is liquid prior to setting. Once the resin dries, however, it is not possible to melt it again.
When it comes to plastic injection molding, it is easy to misjudge the importance of thermoplastic and thermosetting materials. By the way, both thermoplastic and thermosetting materials can be injection molded. The major difference, when using a thermoplastic or thermosetting material, applies after the injection molding cycle when the molded plastic solidifies. During the molding process, plastic is heated and injected into a metal mold. To get to the cavity of the metal mold, however, the molten plastic first needs to pass through an array of entry points and tunnels known as sprues, runners, and gates. The plastic cools within the mold cavity as well as inside the channels that lead to the mold cavity. The plastic that solidifies inside the channels is not the component or part of the final product. It is just a waste.
If a thermoplastic material were used for injection molding, the waste could be recycled and used again. The solid plastic left within the sprues, runners and gates can be combined with the raw material that goes into the injection molding machine. The same thing can happen with the material from rejected plastic parts. All the waste plastic can be collected and recycled back to the onset of the process. This all sums up into higher efficiency, and eventually means, lower costs of the final product and better margin for the producer.
Thermosetting Materials
If a thermosetting material were used for injection molding, the solid plastic from the sprues, runners, and gates is simply a waste, which has no practical use whatsoever. This means that the cost of the final product will be more.
To conclude, thermoplastic materials offer some major benefits to plastic product manufacturers, consumers, and even the society，as such materials are recyclable that we are more responsibly stewarding our natural resources. Indeed, when it comes to plastic prototype development or plastic product manufacturing, the manufacturer should choose and use thermoplastic materials.
Jingwei industry has served the injection molding industry for over 15 years and has a team dedicated to providing you with the most cost effective solutions for design and manufacturing injection mold.Please visit us at :jweimolding.com or contact us via info@jweimolding.com.
Tolerance is an acceptable limit of variation in a physical property or dimension.Defining a tolerance will identify boundaries for acceptable variations that will not affect the function of a part or system. With the injection molded process, major factors that impact tight tolerance include part design and complexity, material selection, tooling, and process design and control. They can make it difficult to hold dimensions to the exact value. That is why an acceptable tolerance is necessary. If tolerance is not done correctly, parts and products will underperform or possibly fail, resulting in customer dissatisfaction and a tooling and/or process overhaul，delays in production and unexpected additional costs. Below are 4 aspects that play key roles in aligning proper tolerance for superior performance.
1. Part Design and Complexity
The first step to controlling tolerance is to establish the tolerance zone during the design phase. Designing the part is the biggest factor in controlling tolerances. Making improvements during the design phase will not only achieve repeatable tight tolerances, but also improve manufacturability, quality, and customer satisfaction, all while reducing costs.
Shrink rates can vary depending on the material selection and product wall thickness. Thicker sections may shrink at a different rate than thinner sections. Varying shrink rates can affect the ability to hold tight tolerances.
Part size can affect shrink rates as well. Small components have smaller shrinkage and are easier to maintain tighter dimensional control. However, large parts can be challenging to hold tighter tolerance as they shrink over a greater distance.
Analyzing mold flow before production can be beneficial. Accurately predicting gate location, fill speed, shear stress, packing, cooling and shrinkage will help define the tolerance zone.
Avoid tight tolerance in areas that are prone to warp, shrinkage or distortion.
2. Material Selection
Material selection is another decision that must be made early in the design process. Different resins can produce different tolerances for the same part, so sometimes a tradeoff must be made between tolerance expectations and the physical properties of the resin.
A components environment can affect plastic properties and can result in a deviation from the tolerance. Plastics have larger thermal expansion than many other materials. Testing and measuring tolerance along with thermal expansion and part shrinkage in the components normal operating environment is crucial to controlling tolerance, but most importantly tight tolerance. Climate-controlled environments hold tighter tolerances well. On the other hand, tight tolerances are not always necessary in environments where temperatures are uncontrollable or where plastic expansion or contraction occurs.
As mentioned in the design phase, shrinkage can affect tolerances. Part geometry can cause different shrink rates. Different resins also have different shrink rates. It is important to know resin properties in combination with part complexity to understand shrink rates to align proper tolerance zones.
3. Tooling
Tool design, tool material, and cavitation all impact tolerance. The need to heat and cool tools, and the number of cavities in the mold, can make holding tolerances more of a challenge. If tooling is not designed to provide consistent, repeatable cooling, shrink rates will vary and tolerances will be harder to achieve.
Complex parts require complex tools. As a tool becomes more complex and additional components and features are added, it is important to make sure all components are transferring heat properly, allowing for acceptable resin and part cooling.
Monitoring pressure will identify resin viscosity, fill time and many other production processes that can affect resin properties and result in deviations and application failures. Utilizing in-mold pressure sensors will help track the proper pressure at each stage of the molding process.
Identifying an adequate gate location is important to achieve optimal material flow. This will contribute to avoiding unexpected shrinkage and warping.
4. Process Design and Control
Setting up the ideal process for the part, and being able to repeat it, is the key to molding tight tolerance parts. Proper process and document control from the beginning of production will ensure the component does not experience unnecessary pressure, stress, heat, or additional factors that can disrupt resin properties or application function.
Many parameters and variables must be carefully controlled during injection molding to achieve tight tolerances. Proper process control and process development ensure the part does not experience unnecessary pressure or stress during the molding process. Matching pressure curves versus simply using machine parameters such as time, temperature, and pressure help eliminate the lot-to-lot variation that is common in the industry. Conducting injection-molding operations in a climate-controlled facility also reduces process variation.
Understanding end user intent, life cycle expectations and environmental encounters are important to share and discuss with your plastic manufacturing partners. Keeping lines of communication open with your plastic manufacturer will aid the success of your application.
Repeatable processes can be achieved by conducting a Rheology test and a gate test. These tests will show you how repeatable your process and machines are, as well as, aid the optimization of your process and cycle time.
Jingwei industry has served the injection molding industry for over 15 years and has a team dedicated to providing you with the most cost effective solutions for design and manufacturing your new products.To know more,Please visit us at :jweimolding.com or via info@jweimolding.com.
In plastic injection molding, one of the most important aspects of the mold design is how and where it is gated. By definition, an injection molding gate is an orifice through which the molten plastic is injected into the mold.The location, size, and shape of the gate plays a very significant role in the process of injection molding.
Gate Types:
There are two types of gates that are used in plastic injection molding: manually trimmed and automatically trimmed gates.
Manually trimmed gates are chosen for several reasons:
• The gate is too thick to be separated automatically
• Shear-sensitive materials such as PVC cannot be exposed to high shear rates
Automatically trimmed gates are used for several reasons:
• Avoiding gate removal as a secondary operation, reducing cost
• Maintaining consistent cycle times for all parts
• Minimizing gate scars on parts
Common Gate Designs:
The largest factor to consider when choosing the proper gate type for your application is the gate design. There are many different gate designs available based on the size and shape of your part,four of the most commonly used are:
The Edge Gate is the most common gate design. As the name indicates, this gate is located on the edge of the part and is best suited for flat parts. Edge gates are ideal for medium and thick sections and can be used on multicavity two plate tools. They leave a scar at the parting line.
The Sub Gate is the only automatically trimmed gate on the list, and it requires ejector pins. A very common gate, it has a number of variations, such as a banana gate or tunnel gate. The sub gate allows you to gate away from the parting line, giving you more flexibility to place the gate at an optimum location on the part. This gate leaves a small scar on the part.
The Hot Tip Gate is the most common of all hot runner gates. Hot tip gates are typically located at the top of a part as opposed to the parting line, this type of gate is great for conical or round shapes that require uniform flow. This type of gate requires a heated element to deliver hot material directly to the part, but it can improve flow and reduce cycle times. It leaves a small raised spot on the surface of the part.
The Direct or Sprue Gate is a manually trimmed gate that is used for single cavity molds of large cylindrical parts that require symmetrical filling.Easy to design and with low maintenance costs, it produces parts that are typically lower stressed and high strength. This gate leaves a large scar on the part at the point of contact.
In our more than 15 years in plastic injection molding,we have significant expertise in this area and can provide tremendous insight on your mold design. Please visit us at :jweimolding.com or via info@jweimolding.com and let’s talk about your next project.
What Is a Plastic Test A plastic test is any type of test done on a sample of plastic. These tests can be used to determine the strength, flexibility, or durability of a plastic and are often used as a measure of quality control. Laboratories that offer to perform plastic tests use a variety of different machines and techniques to determine the quality of the plastic.
The evaluation of plastic materials may include the determination of material flammability, ignition characteristics from various thermal and electrical sources, electrical tracking and additional electrical characteristics, and analytical tests. Property retention following exposure to long-term elevated temperature, water, ultraviolet light, cold, and other outside influences may also be evaluated.
Plastics Testing Methods:
One common type of plastic test is a test of how the plastic holds up under different temperatures. For this type of test, a sample of the plastic is placed in a chamber where the temperature is either raised or lowered at a slow but constant rate. Engineers watch for changes in the quality of the plastic, such as expansion, breaking, melting, or contraction, depending on the specifications of the test, and note the temperature at which the change took place.
Plastics may also be tested for how durable they are under stress. One plastic test that determines durability uses a machine that bends a piece of plastic until it breaks. In another type of test, a piece of plastic may be pressed firmly between two sides of a machine until it compresses or cracks with the strain. Engineers may also use a machine that hits the sample, testing the capacity of the plastic to resist the impact and slow it down. Examining the forces used in each of these types of stress tests gives engineers information about how strong a sample of plastic is.
Some plastics that are intended for use as lenses may also undergo a plastic test that determines how the plastic interferes with light that passes through it. In one such test, a light with a specific wavelength is viewed through the sample, and the color and quality of the light is compared to the color and quality of the same wavelength of light that has not passed through a lens. Haze, or the amount of visible light that is refracted as it passes through a plastic lens, may also be tested in a similar plastic test.
For plastics that are intended for use in different types of conditions, weathering tests may also be performed. A sample can be tested to see how much water it absorbs or to see at what temperature it will catch on fire. A machine that mimics the effects of weather over a long period of time may be used in a plastic test that determines how a sample will hold up over time and exposure to the elements.
Jingwei industry has served the plastic injection molding industry for over 15 years and has a team dedicated to providing you with the most cost effective solutions for design and manufacturing plastic injection molded parts.To know more,Please visit us at :jweimolding.com or via info@jweimolding.com.
Jingwei industry has served the plastic injection molding industry for over 15 years and has a team dedicated to providing you with the most cost effective solutions for design and manufacturing plastic injection molded parts.We can guarantee that only the highest quality plastic products are delivered to our customers.
Quality plastic parts from design, tooling ,manufacturing, assembly, and packaging.Jingwei industry uses injection molding to produce quality plastic parts. Injection molding is a manufacturing process that feeds melted thermoplastic polymer into a precision-machined steel or aluminum mold.
We can mold a wide range of part sizes, as our injection molding machines range from a 33 Ton 3 oz. to an 800 Ton 100 oz.
From our workshop,we process a wide variety of thermoplastic resins. They include filled and unfilled commodity and engineering resins such as polypropylene, polyethylene,polyolefins, polystyrene, nylon, vinyl, polycarbonate,ABS, PVC, PEI, PPO, and so on.
From part design and tool engineering through molding, finishing, and packaging, we create your parts with complete traceability. We have manufactured quality plastic parts for customers in the auto parts,medical equipment, sports industries,electronics industry,Home Appliance Parts,Housewares Parts and so on.
We inspect every plastic molded part multiple times to ensure satisfy your expectations.To know more,Please visit us at :jweimolding.com or via info@jweimolding.com
industries today. Today’s heavily technological society has made some aspects of plastic part design more challenging in certain respects.
Electronics have come a long way in the past few decades, plastic play important roles in the electronic industry. In many ways, plastic and electronics work hand in hand to produce the gadgets we have available today.
The Importance of Thermoplastics To Product Development & Material Efficiency：When it comes to plastic prototype development or plastic product manufacturing, it is useful to understand which material to use. Typically, there are two types of plastic materials: thermoplastic and thermosetting resin.