3. The configuration of the extruder
The gap between the screw rod and the barrel is also a link that needs to be paid attention to in the drawing process of plastic materials. Usually the gap between the screw rod and the barrel does not exceed 0.8mm, and once it exceeds 0.8mm, wire breakage will occur , Edge-curling, poor gloss and other phenomena.
4. The temperature of the extruder.
The extrusion temperature is also an important part of the drawing process. The temperature of the barrel, tee, and die will directly affect the temperature of the filament. When the extrusion temperature is too high, the melt fluidity will be poor. It is easy to cause uneven thickness of the diaphragm, especially when the temperature of the die head is high, it is easy to cause the diaphragm to slack and jump, but when the temperature is too low, the plasticization is poor, the extrusion pressure is high, and the three-way fastening screw is easily damaged.
The above are the points that need to be paid attention to in the drawing process. The extrusion temperature and drying and stirring temperature in the drawing process are determined according to the grades and mechanical properties of the plastic raw materials. Therefore, the extrusion temperature and drying and stirring temperature of different resins All are different.
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Post time: Oct-14-2020