EPDM电线料造粒机-玖德隆机械（昆山）有限公司

Temperature is too high: refers to the temperature control exceeding the optimal plasticizing temperature of a certain plastic, which can easily cause the plastic to burn and age. 1. The basic principle of plastic extrusion
The working principle of the extruder is: using a specific shape The screw rotates in the heated barrel, squeezing the plastic sent from the hopper forward to uniformly plasticize (i.e., melt) the plastic. Through the machine head and molds of different shapes, the plastic is extruded into continuous shapes. The required plastic layers of various shapes are extruded and wrapped on the wire core and cable.
. Plastic extrusion process
Before extruding plastic, check whether the plastic is moist or have other debris, and then preheat the screw and add it to the hopper. During the extrusion process, the plastic loaded into the hopper enters the barrel with the help of gravity or a feeding screw. Under the thrust of the rotating screw, it continues to advance forward and gradually moves from the preheating section to the homogenizing section. At the same time, the plastic is subjected to The mixing and extrusion of the screw transforms into a viscous flow state under the action of the external heat of the barrel and the shear friction between the plastic and the equipment, forming a continuous and uniform material flow in the screw groove. Under the temperature specified by the process, the plastic changes from a solid state to a plastic object in a molten state. Then, through the push or stirring of the screw, the fully plasticized plastic is pushed into the machine head and reaches the material flow of the machine head, through the mold core and The annular gap between the mold sleeves is extruded from the mold sleeve mouth and extruded around the conductor or core to form a continuous and dense insulation layer or sheath layer, which is then cooled and solidified to form a product.
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