Do you know how to application of plastic extrusion equipment and the production of plastic extrusion equipment principle?

The principle of plastics extrusion machine is to turn the solid plastic extruder screw heating and rotating pressure under the condition of the molten plasticizing, through specific shape mould making out with the same cross section and mold in the shape of a continuous plastic products. Its manufacturing materials mainly include carbon structural steel, alloy tool and so on, some of the extrusion dies will be embedded in need of wear-resistant parts, wear-resistant materials such as diamond. Extrusion process is usually only applies to thermoplastic plastic products production, its structure and injection mould and the compression modulus is obviously different.

Foaming extrusion: thermoplastic elastomer TPV can foam through chemical and mechanical methods. For chemical foaming, can use double salt and acid salts such as foaming agent. Foam density reached 0.97 percentage (typically no foamed TPV) to 0.70. Low density is affected by the patent. Foaming agent degradation under 180 ° C to 190 ° C, because most of the TPV foundation under 195 ° C to 215 ° C.

Plastic extrusion equipment application and principle of plastics extrusion equipment production

Multi-layer extrusion: co-extrusion are two kinds of materials in a extrusion process synthesis technology of a parts. In series with the two extrusion machine, in order to provide a bottom die, and make their polymer materials along the corresponding channel were huddled together, in order to obtain two kinds of material extruding glue. Homogeneous material, such as TPV and polypropylene, can fuse together. Multi-layer extrusion is a good mix of hard material and soft material method. Usually, high hardness of section (TPV) is used as the support structure components and provide flexibility and low hardness material. It is common in sealing applications, because seating area is very soft, soft material can flatten to achieve good sealing effect. In the process of equilibrium flow field, substitute TPV for polypropylene as rigid material is relatively simple.

Welding joint: hot welding is a common way to connect TPV extruding rubber. Connect the heat is introduced into the surface to melt surface, then surface together, and put a slight pressure to ensure no gas into the contact surface between. After cooling, the strength of the joint is almost the same as the strength of the component itself. Connection extrusion parts of another method is to use the glue system.