When the screws of co-rotating parallel twin screw extruder rotate in the same direction, the teeth of one screw extend into the groove of the other screw like a wedge, and the material cannot continue to enter the adjacent groove from the groove, but can only be forced to flow from the saw groove of one screw to the groove of the other screw.
In this way, the material is repeatedly forced to turn between the two screws, and it is subjected to good shearing and mixing. If the screw rotates in the reverse direction, the material must pass through the jaws, and the material seems to pass through the mixing gap of two wheels, so the shearing effect will be better.
Similar to the single-screw extrusion process, the twin screw extruder process can also be divided into three stages: feeding and solid conveying, melting and melt conveying. But the twin screw extruder working principle is completely different from single screw extruder. On one hand, the twin screw extruder is forward conveying, forcibly pushing the material forward. On the other hand, the twin screw extruder produces a strong shearing effect on the material at the meshing point of the two screws, which increases the mixing and plasticizing effect of the material.
No matter what kind of co-rotating parallel twin screw extruder, the equipment is basically the same. When producing products, the raw materials are usually processed by the extruder barrel and screw. Therefore, the barrel screw of the twin screw extruder belongs to the processing part of the extruder.
After the product is processed by the screw barrel, it is extruded into the shape of the product we need at the die of the twin screw extruder, so the die of the extruder is also a part of the extruder.
Before the product is processed, we need to raise the temperature of the screw barrel, and we need to control the temperature of the equipment within a certain range during the production process.
There are many types of products that the twin screw extruder can produce, such as rubber sealing strips, rubber tubes, rubber sealing strips, rubber wires and other products. Different types of rubber products require different equipment configurations during production. We need to select the appropriate model and the appropriate type of extruder according to the equipment configuration used in the production of our products.
Therefore, the temperature control part is also part of the equipment, and the power part of the equipment is also provided by the twin screw extruder for product processing. The power part of the equipment drives the screw of the twin screw extruder to rotate to extrude the product. Another is that the transmission power part of the gearbox is also indispensable in the equipment.
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