The principle of plastic injection molds

2023-09-13

1. The plasticized plastic melt during the Injection Process is stored in the material storage area of the barrel. During injection, the screw moves axially. Under the injection pressure of the screw, the plastic melt flows through the nozzle and Mold pouring system installed at the front end of the barrel at a certain rate and is injected into the mold cavity.

2.During the plasticizing process, whether the temperature of the plastic melt meets the injection requirements and whether the temperature distribution is uniform is an important parameter to measure the plasticizing function of the Injection Molding machine, which refers to the amount of molten plastic that the injection molding machine can provide per unit time.

3. Due to the cooling effect of the mold cavity, the plastic melt undergoes cooling shrinkage. At this time, the injection screw continues to provide pressure to maintain the plastic melt filling the mold cavity without backflow, and appropriately replenishes the plastic melt to fill the shrinkage space in the mold cavity until the plastic melt gradually cools and solidifies into a product.

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