Heating and cooling system of twin-screw extruder
The twin-screw extruder has less heat generated by friction, relatively uniform shearing of the material, large screw conveying capacity, relatively stable extrusion volume, long residence time of the material in the barrel, and uniform mixing. The twin-screw extruder has good feeding characteristics, is suitable for powder processing, and has better mixing, exhaust, reaction and self-cleaning functions than the single-screw extruder, and is characterized by processing plastics with poor thermal stability and blending It also shows its superiority when feeding. In recent years, TENGDA's twin-screw extruder has developed greatly. Various forms of twin-screw extruders have been serialized and commercialized, and there are many production equipment and accessories.
The main motor of the twin-screw extruder and the oil pump motor are electrically interlocked, that is, the oil pump motor does not start, and the main motor cannot start; the main motor does not stop, and the oil pump motor cannot stop. When the head pressure exceeds the set alarm value, the material pressure alarm signal light will be on and the machine will stop automatically. The main motor and the feeding motor are electrically interlocked, that is, the main motor does not start, and the feeding motor cannot be started; the main motor of the feeding motor does not stop, and the main motor cannot stop. The main motor control cabinet of the twin-screw extruder has over-current protection, which has been set before leaving the factory. In addition, it also has a mechanical protection device, generally a nylon shear pin type safety coupling. When the design torque is exceeded, the shear pin is cut off and the transmission box stops working. The twin-screw adopts frequency conversion speed regulation, AC motor drive or DC speed regulation, DC motor drive. The deceleration and twin-screw drive are in the same box, with compact dimensions. The safety coupling equipped with shear pins can protect the screw and transmission box from being damaged due to overload.
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