[時事閒聊] What are the factors that affect the size of plastic molding

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When designing plastic parts, the size of the plastic molding size depends on the fluidity of the plastic. plastic molding size The main factors that affect the size of plastic parts are as follows.

1. Material factors. Amorphous or semi-crystalline material, filler or reinforcing agent content and degree of moisture absorption.

2. Geometry of plastic parts. Nominal wall thickness, wall thickness variation, overall dimensions of plastic parts, shrinkage resistance and slope.

3. Mold factor. gate location. Type and size, runner system, cooling system, mold tolerance, ejection system, and elastic deformation of the mold.

4. Process factors. Melt temperature and its uniformity, molding temperature and its uniformity, filling, pressing and holding pressure, filling, pressing and holding time, ejection temperature of plastic parts, clamping force, setting after forming, annealing, etc.


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