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How to produce high quality injection molded nylon parts


Injection molding is an accessible and ubiquitous process that can be used for the manufacture of a wide variety of products. This process is so versatile that it is a very good choice for your product, but the efficient molding of high-quality nylon parts requires careful process and product design. The decisions you make during production greatly determine the achievable end product. Fortunately, you can use a few design principles to get the high-quality nylon parts you need in injection molding.

Remember the need for the process.

Injection molding has two hollow mold halves using a negative image of the part before hot liquid plastic is injected into the mold and cooled. When cooling is effective, the two halves are separated. Do not forget to properly position the gate so that removal of the finished product does not interfere with part integrity. Nylon materials shrink during cooling, so pay attention to part dimensions and design factors for high quality results. I also like to think about the parting line when creating a design so that it is in the proper area of ​​the final product during part release.

Pay attention to the wall thickness

One of the best things you can do when manufacturing nylon parts is to design with manufacturability in mind. Although most manufacturers can work with uniform wall thicknesses for spritzgussteile, molds and parts can be improperly designed due to shrinkage factors during the cooling process. Place a thicker area on the lower mold part to help gravity keep cooling the material in all the right way.

Carry out proper cooling and evacuation.

A quality injection mold depends not only on how the process is handled, but also on how effective and efficient the cooling system is. Molds must be kept at a constant temperature to avoid warping and shrinkage while minimizing cycle times for maximum production output. So make sure the cooling system of your nylon parts is well designed for quality. Care must also be taken when removing parts from the mold. Ensure that cycle times, ejection mechanism types, and placement of ejector pins are precisely calculated to minimize defects in the final product.

Run samples to improve quality

One of the best ways to avoid rework in the mold cavity is to first make a sample mold to test the part. This move will help determine if there should be any adjustments to the mold or molding parameters and resin selection. Parts sampling makes it easy to collect quality issues, saving money and time. When you run a sample, you can ensure that the final part meets the expected standards.

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