The gas-assisted injection molding system directly injects nitrogen through a staged pressure control system into a plasticized plastic within a cavity of a human mold, so that the internal expansion of the plastic component forms a hollow, but the surface of the product remains intact. In recent years, gas assisted injection molding system technology has developed rapidly. At present, this technology has been applied to the production of many plastic parts, such as various packaging products and television sets or audio and other household appliances, automotive plastic products.
Compared with ordinary injection molding, gas-assisted injection molding has many unparalleled advantages: (1) Gas-assisted injection can save plastic materials greatly when the parts can meet the same use requirements, and its saving rate can be as high as 50%. (2) It can greatly shorten the forming time of the parts. On the one hand, the reduction in the amount of plastic raw materials brings about a reduction in the time of each cycle of the entire molding cycle; on the other hand, the introduction of high-pressure gas inside the parts has greatly improved the shrinkage deformation of the parts, so the injection pressure holding time, Injection pressure can be greatly reduced pressure; (3) reduce the injection machine injection system and clamping system work pressure, and accordingly reduce the energy consumption in the production and prolong the life of the injection machine and mold.
(Liu Guoxin)
Source: Packaging News
