NANJING LESUN SCREW CO.,LTD

Precautions and Working Process of Extruder Barrel

1. Precautions for the extruder barrel


1. After the extruder barrel heats up, remove the nozzle, the head coupling body of the extruder barrel, and take out the extruder screw. Brush the inner wall of the extruder barrel with a copper mesh brush moistened with mold release agent, and then tie a cloth strip to a long wooden stick to clean the inner hole of the extruder barrel, and inspect the inner wall for cleanliness and damage with the light method.


2. In addition to checking whether the inner wall of the extruder barrel is clean and scratched, it should also be checked for wear. The method is to lower the extruder barrel to room temperature, and use the extruder barrel measuring instrument to measure multiple points from the front end of the extruder barrel to the periphery of the hopper. The distance can be 3 to 5 times the inner diameter. When the wear is severe, consider re-boring the extruder barrel and increase the size of the screw accordingly.


The energy saving of the extruder barrel can be divided into two parts: one is the power part and the other is the heating part.


The power part of the extruder barrel is energy-saving: most of the inverters are used. The energy-saving method is to save the residual energy of the motor. For example, the actual power of the motor is 50Hz, but in actual production, only 30Hz is sufficient for production. The energy consumption of the inverter is wasted, and the inverter is to change the power output of the motor to achieve the effect of energy saving.


The heating part of the extruder barrel is energy-saving: the heating part is mostly energy-saving by using electromagnetic heaters, and the energy-saving rate is about 30% to 70% of the old-fashioned resistance coil.


2. The working process of the extruder barrel


The plastic material enters the extruder barrel from the hopper, and is transported forward by the rotation of the extruder screw. During the forward movement of the material, it is heated by the barrel and brought by the extruder screw. Shearing and compression make the material melt, thus realizing the change among the three states of glass state, high elastic state and viscous flow state.


In the case of pressurization, the material in the viscous flow state is passed through a die with a certain shape, and then becomes a continuum with a cross-section similar to the die. Then it is cooled and shaped to form a glassy state, thereby obtaining the workpiece to be processed.


Our company is specialized in producing parallel and co-rotating modular screw elements, barrels and screws, involving various models from Ø20mm to Ø300mm. After ten years of vigorous development, our company now has a number of advanced CNC machine tools and special processing equipment for screw manufacturing. Now our machining operations have basically realized intelligence and automation. Advanced processing methods, strong technical force, and sophisticated processing technology ensure that the quality and technical indicators of each production fully satisfy customers. If you have any need, please consult us.

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