(1) host. Plastic extrusion molding of the main equipment is the extruder, that is, the host. It mainly includes extrusion and charging system, transmission system, heating and cooling system, control system.
①Extrusion and feeding system. Mainly composed of hopper, screw and barrel, is the key component of the extruder. Its role is to make the plastic plasticized into a uniform melt, and in the process generate pressure, and then by the screw continuous, fixed-pressure, fixed-temperature, fixed-quantity extruder head.
②Transmission system. Mainly consists of electric motors, regulating devices and transmission devices. Its role is to drive the screw, and supply the screw in the working process of the required torque and speed.
③Heating and cooling system. It consists of temperature control equipment, and its function is to ensure that the molding of the extrusion system is carried out within the range of process requirements by heating and cooling the barrel.
④Control system. Mainly consists of electrical appliances, meters and actuators. Its role is to regulate and control the screw speed, barrel temperature, head pressure and so on.