When the temperature in the feeding section of the plastic filament extruder is too high, the direct harm is to reduce the output, thereby affecting the output of the monofilament. So, what is the cause of this hazard? What is his solution?
The temperature in the feeding section of the extruder is too high, the raw materials are melted and plasticized in advance after entering the feeding section, and the screw rotates, which reduces the extrusion volume. If the temperature in the feeding section is too high and reaches the plasticizing temperature, the raw material will be plasticized when it enters the section, sticking to the feeding section, blocking the raw material to be transported further, so that the previous section (compression section) cannot be compressed and compacted, and the plasticizing effect is poor and lost The friction force of the screw pushing the raw material forward, the screw gradually rotates, so that the extrusion capacity is gradually reduced, and the material is broken afterwards. This is some obvious phenomenon of wire drawing machine when the temperature is too high.
The reason for this phenomenon is that the high temperature of the compression section of the extruder transfers heat to the feeding section; or the temperature of the feeding section is set too high; or the screen changing time is long and there is no flowing material to take away the heat and the feeding section is transferred. Heat temperature rises.
Therefore, the simple and direct way to solve this problem is to reduce the given temperature in the feeding section. Another thing is to minimize the use of powder and scrap, and directly use pellets, which will also effectively solve this problem. Reduce and reduce the impact on monofilament yield.
Post time: Sep-27-2021