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219. ExtruPlastic extrusion molding Law

Plastic molding method up to thirty several. It is mainly determined by the choice of the type of plastic (thermoplastic or thermoset), the initial shape and the shape and size of products.

Also known as extrusion molding or extrusion extrusion, it is in the extruder by heat, pressure leaving a continuous state of the material to flow through die molding method. Extrusion method is mainly used for molding thermoplastics, thermosetting plastics can also be used for some. Extruded products are continuous profiles, such as tubes, rods, wire board, film, wire and cable coating and so on. In addition, the mixture can also be used for plastic, plastic granulator, coloring, blending and so on. Extruder from the extrusion device, transmission, and heating and cooling systems and other major components. A screw extruder (single screw and multiple screw) and two types of piston. The former is a continuous extrusion process, which is intermittent. Single screw extruder, including the basic structure of the main transmission device, feeding device, cylinder, screw, die and die and other parts. Extrusion auxiliary equipment materials pre-treatment equipment (such as material handling and drying), out of materials handling equipment (shape, cooling, traction, or roll material cut paper), and production conditions, control equipment and other three categories.