The extruder barrel screw plastic material enters the e […]
The extruder barrel screw plastic material enters the extruder from the hopper, and is transported forward by the rotation of the extruder barrel screw. During the forward movement, the material receives the heating and extrusion of the barrel. The shearing and compressing action brought by the extruder barrel screw makes the material melt, thus realizing the change among the three states of glass state, high elastic state and viscous flow state. In the process of rotation, the plastic is mainly sheared and plasticized by the screw, so the screw will bear huge shear stress and friction. Due to long-term working under harsh conditions, the screw edges are worn, the screw edges are worn, the screw edges become smaller, and the gap with the barrel increases, which will lead to a reduction in the amount of plastic extrusion, and in severe cases, plastic backflow will occur, and the plasticizing effect will be reduced. , the phenomenon of serious decline in grain size and production capacity.
The extruder barrel screw is the most important part of the plastic machine equipment, which is directly related to the plasticizing effect and output of the plastic machine.
The material of the extruder barrel screw must have high mechanical strength, can withstand huge torque and have no deformation under high temperature and high pressure conditions.
