How to Evaluate Custom automobile Injection Molders

Automobiles must perform consistently in all aspects, including cooling, heating, fuel delivery, and powertrain. A manufacturer must partner with an injection moulder to achieve these critical functions.

To objectively evaluate potential partners in custom injection molding, you need to ask specific questions. This will help determine their qualifications, specializations, and if they are a good match for your needs.

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IAT16949 is the standard for quality management in the automotive industry. This certification shows that a molder is committed to quality and willing to uphold the highest standards in automotive engineering and manufacturing.

A molder must not only be certified but also have a track record of success in the manufacture of automotive parts. Their experience is measured by their ability to understand the factors that affect part performance and quality.

Expert knowledge of certain resins for automotive parts, moldability Tolerances and dimensions

Functionality of finished parts, in particular as it relates working within certain design constraints to deliver sufficient robust components


Molders who are familiar with the automotive industry know the importance of time. It is essential that components are designed and fit properly. Failure to do so can result in wasted time and money, as well as costly product retooling.

A molding partner who conducts thorough design for manufacturing studies can help you save time and produce quality parts.

Mold flows are used to verify the design and material performance, or reveal areas that need improvement. Mold flow analysis, for example, can help identify incorrect gate locations in part designs. It is important to know about the corrective actions that can be taken without causing significant cost or time loss.

Reviewing design prints can help determine the dimensions and tolerances that an automobile component will need before it is sent to the mold. This eliminates the frustration and time spent on resolving moldability or trapped steel issues. These problems can delay progress by as much as a month, which is a major detriment for any manufacturer.


Forward-thinking is the hallmark of a true partner in custom injection molding. They will not only produce parts that you have already made from plastic efficiently, but they will also identify potential opportunities to make metal parts out of plastic to reduce vehicle weight and costs.

This requires that the molder has a deep understanding of metal-to plastic conversion. To ensure uniform wall thickness and consistency of manufacture, for example, if a piston made from die cast metal has pinholes, the new component must have larger holes to allow heavier pins to pass through.

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