What does the injection molding process include?

What does the injection molding process include?The injection molding process refers to the process of injecting molten plastic raw materials into the injection molding machine, and then manufacturing the product in the mold after a series of process steps such as heating, pressure and cooling.

What does the injection molding process include?

The injection molding process refers to the process of injecting molten plastic raw materials into the injection molding machine, and then manufacturing the product in the mold after a series of process steps such as heating, pressure and cooling. The following is an introduction by [Dongguan Yongchao Plastic Mold Factory], hoping that everyone will have a better understanding of the injection molding process. (For reference only)

The injection molding process usually includes the following 7 stages:

(1) Closing the mold: In order to start injection molding, you first need to move the mold to the injection molding machine and align and close them correctly. During this process, the mold is powered by a hydraulic system.

(2) Locking stage: Execute the locking program in the injection molding machine and ensure that the mold is completely closed and locked. Once the mold is locked, other production steps can be continued.

(3) Plastic injection stage: In this step, the injection molding machine feeds the plastic raw material into the injection cavity, and the plastic melts and enters the mold through the nozzle, filling the mold cavity until the desired shape of the part or product is formed.

(4) Pressure holding stage: After the part fully fills the mold cavity, the injection molding machine will apply a certain amount of pressure between the barrel and the mold to ensure the appearance and performance quality of the part.

(5) Plastic cooling stage: After the pressure is fully maintained, the injection molding machine continues to apply pressure for a certain period of time (cooling time), and through the cooling system in the mold, the surface temperature of the part is quickly reduced to below its initial hardening point to achieve plastic cooling and solidification.

(6) Mold opening stage: When the injection molding machine completes all the steps of manufacturing the product, the mold can be opened and the part can be pushed out of the mold through the hydraulic system.

(7) Part shrinkage stage: When the parts are taken out of the mold, they will come into contact with the air and begin to cool. At this time, due to the influence of plastic shrinkage, the size of the part may be slightly reduced, so the size of the part needs to be appropriately adjusted according to the design requirements.

In summary, the injection molding process mainly includes mold closing, mold clamping, plastic injection, pressure holding, plastic cooling, mold opening, and part shrinkage.