There are many kinds of polymers which can be processed in extrusion molding。 There are many kinds of products。 There are many differences in molding process。 But the basic process is roughly the same。 The common one is to squeeze out the products by adding material in solid state。 The extrusion forming process is that the granular or powdery solid material is added to the hopper of the extruder。 The heater is used outside the barrel of the extruder。 The heat generated by heat conduction is transmitted to the material in the material simply by the heat conduction。 The temperature rises to reach the melting temperature。
Other extruded products, with material characteristics, product size and production requirements, the structure, type and specification of the extruder can be different; the structure, shape and size of the head are designed and manufactured according to the specific products; the cooling setting method depends on the product and material properties; the rest of the auxiliary machines also have many different points。 However, the process links in the above block diagram are basically the same。
Extrusion molding in Dalian is also known as extrusion in plastic processing. It is extruded in the non rubber extruder by extruding the hydraulic press on the mold itself. It is a processing method of the material through the extruder and the screw between the extruder and the screw, the edge is heated and plasticized, the edge is pushed forward by the screw, and through the head of the machine, it is made into various sections or half products.
The control system of the plastic extruder consists of the heating system, the cooling system and the measurement system of the process parameters, which are mainly composed of electrical appliances, instruments and actuators (the control panel and the operating table)。 Its main function is to control and adjust the drag motor of the main auxiliary machine, output the speed and power that conforms to the process requirements, and coordinate the work of the main and auxiliary machines, detect and adjust the temperature, pressure and flow of plastic in the extruder, and realize the control or automatic control of the whole unit。