The shrinkage rate of POM material must be calculated when manufacturing POM plastic pepper ball mold, but POM plastic pepper ball mold is different from other POM products. POM plastic pepper ball is a solid sphere, and the larger the size, the larger the shrinkage rate will be, so the shrinkage rate of POM plastic pepper ball mold must be calculated by experience.

The mold material of POM plastic pepper ball must be made of corrosion-resistant S136 material, and the material can only be used after heat treatment. Because the hardness of the mold material is not enough, the semi-finished product of the molded blank ball will be greatly criticized, which will affect the efficiency of secondary processing, and the mold must be vented. Because the air in the mold cavity of POM plastic pepper ball can not be exhausted outside the mold, there will be air holes in the molded POM plastic pepper ball blank ball, which will affect the POM plastic pepper ball.