There are many kinds of processable polymers in extrusion molding, and the products are more diverse. There are many differences in the molding process, but the basic process is roughly the same. The more common process is to feed and extrude the products in solid state. The extrusion process is that the granular or powdery solid materials are added to the hopper of the extruder. There is a heater outside the barrel of the extruder. The heat generated by the heater is transferred to the material in the barrel through heat conduction. The temperature rises to the melting temperature.
Dalian extrusion molding machine operation, barrel screw rotation, the material forward transport, material and barrel, screw and material in the movement process of friction, shearing between material and material, resulting in a large number of heat, and heat conduction in conjunction with the continuous melting of Gaco materials, molten materials are continuously and steadily transported Send to the machine head (or die) with a certain shape. After passing through the die, the material in the flowing state takes the shape similar to the mouth shape, and then enters the cooling and setting device, so that the material solidifies on one side and keeps the fixed shape on the other. Under the action of the traction device, the product moves continuously, and the size of the product is obtained.
Cut products by cutting, so that they can be stored and transported. Other extrusion products, with material characteristics, product size and output requirements, the structure, type and specifications of the extruder can be different; die structure, shape, size according to the specific product design and manufacturing; cooling and molding methods depend on the product variety and material performance; the rest of the auxiliary machine will also have many different points. However, the process links in the above block diagram are basically the same.