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How to improve the accuracy of injection molded parts?

   The application range of plastic parts is becoming more and more extensive, from simple tableware and kitchenware to complex mechanical parts, electronic product casings, etc. Plastic parts are used. However, for plastic parts with high precision requirements such as electronic product casings, injection molding When manufacturing, attention must be paid to the accuracy requirements from the beginning of mold manufacturing.

What factors determine the accuracy of the Custom Injection Molding process of plastic parts? How can we improve the accuracy of thin-walled injection molded parts?

1. Close the mold pressure: In principle, it should be greater than the total pressure of the plastic injected into the mold, based on the absence of burrs.

2. There is a partially identical relationship between pressure and speed. The purpose of acting on the mold is to make the raw materials enter the mold evenly, thoroughly and in an appropriate amount to fill every corner. If it is too low, it will cause short shots, shrinkage, if it is too high, it will have burrs, over-fullness, mold sticking, scorching, fragile molds and high internal stress.

3. The speed determines the condition of the raw materials in the mold runner and the finished product. If the speed is too fast, there will be burrs, overfill, and burnt. If the speed is too slow, there will be short shots, shrinkage, poor bonding, and easy breakage.

4. Temperature: Different raw materials have different temperatures. If the melt is too low, the glue will be opaque, resulting in uneven colors and increased internal stress in the finished product. If the temperature is too low and the pressure is too high, it may cause the screw to break. If it is too high, the product will have burrs, and the temperature difference due to cooling will cause shrinkage. The raw materials will decompose, turn yellow, discolor, and break easily. The cooling time becomes longer and the gas is not easily discharged.

Custom Injection Molding


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Contact: plastic injection molding Company

Phone: +86 18218572927

Tel: +86 0755-27164277


Add: Northwest of Huihao Industrial Park, No. 1, Chuangwei Road, Guangming District, Shenzhen