What should be Consider When Designing a Custom Injection Molded Part

Designing and producing custom injected molded parts is a fairly complicated process. Though there are some fairly obvious components to this endeavor, there are also some less obvious aspects that must be considered and perfected. Let’s take a look at the most important items to consider before diving into the injection mold design process.
Define the Physical Properties
The physical properties of the custom injection molded part must be defined at the outset of the process. Of critical importance is the part’s caliber of strength, amount of stiffness, impact resistance level, electrical concerns, wear/scratch mar and whether it needs to be flame retardant.
Environment
Take some time to think about the types of chemical exposure the custom injection molded part will be subjected to. If it can’t withstand the rigor of such exposure, the design must be revised. Consider the level of warmth and humidity the part will be subjected to. If it fails to function when the temperature and humidity rise, the part’s design must be altered. Perform extensive temperature-failure analyses prior to the production of the injection mold design.
Additional environment considerations include stress cracking, UV-define failure-color and property/material degradation due to wear and tear.
Cost
Establish a reasonable cost target. You must figure out exactly how much the product will cost to produce. Furthermore, the price of the product for sale should also be defined.
Aesthetic Concerns
Though utility is the utmost concern when it comes to injection mold design, the part’s look also matters. Consider what you would like the surface appearance to look like. The part’s color and decorations should be selected prior to the start of production.
Compliance Issues
Consider compliance concerns before commencing production. The part must be in compliance with regulatory and agency standards.
Consider the Project Origin
Take some time to define the project origin. The subtleties of the injection mold design process hinge on whether it is a new project design, a new product, new application, a metal-to-plastic conversion or a new product that is meant to replace an alternative material.
Mold Ability
Consider whether the part fits injection molding capabilities. Determine if the identified resin is appropriate for the part’s idiosyncratic design. Perform a mold flow analysis.
The considerations outlined above all play important roles when deciding on injection mold design. The most successful projects are launched without flaw due to a completion of research during the design and conception stage. Everyone from engineers to resin suppliers, molding vendors and beyond will play an important role in working through the considerations outlined above.Designers, engineers and other relevant team members will prove essential to the successful development and design of plastic injection molded components.

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4 top design considerations for the injection molding process

When you are preparing designs for the injection molding process, there are many factors to be taken into consideration. As a leading manufacturer of thermoplastic injection molded parts, we have the experience and knowledge of what makes a great design for the production of outstanding products.
As you begin the design process, there are important details to keep in mind. Plastic injection molded parts offer many advantages. The following are the top design considerations for the injection molding process.
1. Draft.This is the first and probably most important item to consider. Draft is what helps eject the part from the mold. Stuck parts, or parts that need to be forced out of the mold, are often damaged or distorted rendering them useless. To facilitate mold release, draft angles must be calculated during the design phase and customized for each part.
2. Wall thickness.When designing a part, minimum wall thickness must be considered. The thinner the wall the less plastic is required. Cycle times will be shorter because parts cool faster. Ideally, parts should be designed with the thinnest walls possible while still maintaining the integrity of the part.Uniformly thick walls offer the best possible outcomes in terms of reducing warping and maintaining quality. When wall thickness varies, filling the mold is more difficult and leads to stresses at boundary areas. If uniform wall thickness is not possible, a gradual taper is the best design option.
3. Wall strength.To strengthen the walls of the part, ribs are a vital consideration. During the design process, the thickness of the ribs must be in proper proportion to the walls. The height of the ribs, their orientation, and incorporating draft angles are aspects that must be taken into consideration when creating part designs.
4.Know your materials.  Material selection is one of the most critical considerations in designing your piece — it factors into many aspects of the process, including shrinkage factor, cooling time, flexibility and more. Different materials can have different minimum and maximum wall thicknesses, for instance, or can require different degrees of draft.
Although we have highlighted the top four items to consider when designing parts for plastic injection molding, there are many, many additional considerations. Jingwei molding has more than 15 years experience in mould design and making. Any questions,please feel free to contact us via info@jweimolding.com or visit us at :jweimolding.com