What should we Pay Attention to in the Cooling Process of Injection Molding?

In the process of injection molding, plastic particles are injected into the mold by the injection molding machine, and after the appropriate cooling time, they become molded injection parts, so what needs to be paid attention to in the cooling of injection molding.

1, injection plastic when to start cooling

Plastic particles, once the molten plastic inside the injection mold is in contact with the inside of the injection mold, it begins to cool, cure, and form.

2, shrinkage phenomenon during cooling

The injection molding machine continues to inject, and as the plastic cools, it will cure into the shape of the desired injection part, but during the cooling period, the part may experience some shrinkage

Filling the material at the injection stage allows other materials to flow into the injection mold and reduces the amount of shrinkage visible, and the injection mold cannot be opened until the required cooling time has passed.

3, injection cooling time if estimated

During the processing of injection parts, how long the cooling time is very important, and the cooling time can be estimated according to several thermodynamic properties of plastics and the wall thickness of parts.

In short, this step of cooling in injection molding is very important, especially the cooling time, which is directly related to the quality of injection molding products.