The exhaust injection molding machine for exhaust plastic injection molding has an exhaust port in the middle of the barrel, which is also connected with the vacuum system. When the plastic is plasticized, the vacuum pump can pump the water vapor, monomer, volatile substances and air in the plastic through the exhaust port; Raw materials do not need to be pre dried, so as to improve production efficiency and product quality. It is especially suitable for polycarbonate, nylon, plexiglass, cellulose and other hygroscopic materials.

The flow plastic injection molding can be carried out by ordinary moving screw injection machine. That is, the plastic is continuously plasticized and squeezed into the mold cavity with a certain temperature. After the plastic fills the mold cavity, the screw stops rotating, and the material in the mold is kept under pressure for an appropriate time by the thrust of the screw, and then cooled and shaped. Flow injection molding overcomes the equipment limitation of large-scale products, and the quality of products can exceed the maximum injection quantity of injection machine. Its characteristic is that the plasticized object is not stored in the barrel, but continuously squeezed into the mold, so it is a method of combining extrusion and injection.

Co injection plastic injection molding is a method of injecting plastics of different varieties or colors into the mold at the same time or successively by using an injection machine with two or more injection units. This method can be used to produce multi-color and (or) multi plastic composite products. The typical co injection molding is two-color injection and multi-color injection.

In plastic injection mold without runner, there is no shunt channel, and the molten material is directly injected into each mold cavity by the extended nozzle of the injection machine. In the process of injection, the plastic in the flow channel keeps melting and flowing, and does not come out with the product when demoulding, so there is no residue in the flow channel. This molding method not only saves raw materials, reduces costs, but also reduces processes, which can achieve full-automatic production.

The principle of reactive plastic injection molding is to pump the reactive raw materials into the mixing head after being measured by the metering device, mix them in the mixing head, and then inject them into the closed mold at high speed to quickly solidify, demould and take out the products. It is suitable for processing polyurethane, epoxy resin, unsaturated polyester resin, silicone resin, alkyd resin and other thermosetting plastics and elastomers