1. Select the shrinkage rate of the plastic material

Even for the same plastic material, if the molding conditions are different, then its shrinkage rate will be different. Plastic molds require that the shrinkage change rate be small, and the expected shrinkage rate and actual shrinkage rate should be as close as possible, but in the actual operation process, it is actually difficult to achieve, generally after the mold test to modify the mold.

2. Dimensional accuracy of plastic mold

The dimensional accuracy of plastic molds should be based on product drawings to consider the mold design, production and injection molding process, so how to ensure that the actual plastic mold size is within the dimensional tolerance range required by the drawings is a key issue. The dimensional accuracy of the plastic mold affects the accuracy of the final product.

3. Deformation caused by the injection molding process

The deformation of the plastic mold during the injection molding process is mainly due to the uneven shrinkage, and the internal stress in the mold causes the product to deform.

4. Deformation generated when plastic products are demolded

If the shrinkage rate of the plastic material is relatively small, it should be noted that when the molding pressure is high, the plastic product is likely to remain in the mold cavity. Not easy to release. Therefore, when designing plastic molds, it is necessary to ensure that the plastic products are demolded without deformation to prevent deformation.

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