During the injection molding process of plastic products, shrinkage is often encountered, mainly due to uneven wall thickness of the product, and areas that are too thick are prone to shrinkage

1. The exhaust slot can only let the gas out. Instead of letting the plastic solution flow out. 2. Different plastics have different depths of exhaust slots due to their different viscosity. 3. The cavity should be designed with exhaust slot, flow channel and cold material cavity, as well as exhaust slot, so that the gas in the gating system can enter the mold cavity as little as possible.

Maintenance of injection molds is very important. You must know that any damage to the plastic mold processing manufacturer may cause production stoppage. Under the normal operation of the mold, test the performance of various parameters of the mold to determine the existing condition of the mold.

Injection molding is a very complex process, and it involves several professional knowledge such as physics and chemistry. Therefore, we need to pay special attention. Otherwise, if you are not careful, many defects will occur, which will affect the normal efficiency of plastic parts processing. .

Controlling the temperature of plastic injection molding mainly starts from three aspects. The temperature that needs to be controlled in the plastic injection molding process includes barrel temperature, nozzle temperature and mold temperature. The first two temperatures mainly affect the plasticization and flow of plastics, while the latter temperature mainly affects the flow and cooling of plastics.

For the error caused by the inconsistency between the predetermined shrinkage and the actual shrinkage, the smoothness of demolding, the effect of cooling, especially the influence of the size, position and shape of the gate on the accuracy and appearance of the product, it is necessary to test the mold. test. Therefore, mold trial is an indispensable step to check whether the mold is qualified or not and to select the molding process.