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injection mold Maker How to control the plastic thread accuracy

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injection mold Maker How to control the plastic thread accuracy
Click number:- Release time:2019-06-14

From the data analysis of the HKY injection mold business department, when they communicate with some new customers recently, they often mention about the plastic thread. Some customers say that the injection mold Maker they found previously is very attractive on quotations, but their plastic thread precision is insufficient, resulting in heavy loss. Finally, this customer reached HKY mould for help. We hope that we can help the production, but only if we can ensure the accuracy of the plastic thread and meet the requirements, we told customer that we have 10 years of experience in the industry, there can be no shortage of precision problems, please rest assured, the following items describes how we solve this plastic thread accuracy problem.  

plastic thread accuracy

Comparing with the steel, the strength and power of plastic are weaker, the HKY injection mold maker have a stepped hole with a depth of 0.2-0.8mm at the beginning of the screw hole in order to prevent the screw of the outermost circle of the screw hole from being cracked or deformed. The end of the thread should not be connected to the bottom surface. Generally, the distance from the bottom surface should be 0.2 mm. Similarly, the beginning and the top of the plastic thread should have a distance of more than 0.2mm, and the end and the bottom should also have a distance of 0.2mm. The beginning

Injection Mold Maker HKY Engineer believes that the diameter of the plastic thread should not be too small, the diameter of the thread should not be less than 4mm, and the inner diameter should not be less than 2mm. If does not take into account the shrinkage value for the pitch of the thread on the mold , the mating length of the plastic thread should not be too long, generally not more than 1.5-2 times the diameter of the thread, otherwise interference will cause additional internal stress, which will reduce the strength of the threaded joint.

Threads that are directly formed on plastic products do not meet high precision requirements. It is not advisable to use plastic threads in places where there is frequent loading and unloading and stress, but metal inserts should be placed in the plastic. Plastic thread should use larger screw size. When the diameter is small, do not use fine thread. Otherwise, it will affect the strength of use. China HKY injection mold has ten years of experience in the industry, the precision can be guaranteed, customers can rest assured.

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