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Application and injection process of gas assisted injection molding

Gas assisted injection molding It can be said that it is a kind of molding technology, just like the model, but it has higher technical content than the model. The model is also from the gas assisted injection molding, and the gas assisted injection molding is widely used in many fields.

Gas assisted injection molding technology is mainly used in automobile plastic products, home appliances, mobile phone, PDA and laptop computer shell, daily necessities and so on. He can solve some problems in the injection molding process.

The process of gas assisted injection molding is to inject precisely measured polymer melt into the mold cavity, which is the same as traditional injection molding until the melt is filled with 60% ~ 95% of the cavity. Then the compressed gas is injected into the melt, and the melt flow front continues to flow forward along the direction of minimum resistance driven by high pressure gas until the whole cavity is filled. The product is cooled under gas pressure. During the cooling process, the gas is applied from the inside to the outside to ensure that the outer surface of the product is close to the die wall, and the volume shrinkage caused by the cooling and solidification of the melt is supplemented from the inside through the secondary penetration of the gas. After the product is cooled and solidified, the high-pressure gas is discharged, and then the mold is opened to eject the product to complete a molding cycle.