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Screw and Barrel for Recycling Machine manufacturers take you to understand the reasons for the damage of plastic screws in the screw barrel
The Screw and Barrel for Recycling Machine manufacturer tells you that in daily use, the plastic screw will also be damaged in the screw barrel. So, do you know what caused it? Let's take a look at it today.
Screw and Barrel for Recycling Machine manufacturers tell you that the plastic screw rotates in the screw barrel, and the friction between the material and the two is the gradual wear of the working surface of the screw and the barrel: the diameter of the screw gradually decreases, and the diameter of the inner hole of the screw barrel gradually increases. In this way, the matching diameter gap between the screw and the screw barrel increases little by little with the gradual wear of the two.
Screw and Barrel for Recycling Machine manufacturers tell you that because the resistance of the mold and the shunt in front of the screw barrel has not changed, this increases the amount of oil leakage when the extruded material moves forward, that is, the flow of the material from the diameter gap to the feeding direction increases. , resulting in a decrease in the output of the extruder. Screw and Barrel for Recycling Machine manufacturers tell you that this phenomenon increases the residence time of the material in the barrel, causing the material to be overplasticized or even decomposed. In the case of polyethylene, the hydrogen chloride produced by the decomposition enhances the corrosion of the screw and barrel.