The plasticizing process of raw materials in the single-screw Plastic pellet machine

According to the requirement of the formulation for plastic products, through inlet hopper sent evenly send raw materials to the chamber of the Plastic pellet machine. As the screw rotates, the material is propelled by the thread to the front of the chamber.

In the front of the chamber, there is resistance of screen pack, shunt plate and molding mould, besides, with the gap between threads shrinking, under the gradually shallower depth of thread material combined with heating generated by the chamber at the same time, material pushed forward will be squeezed, sheared, heated and stirred , and coupled with force generated by friction between inner chamber walls and the thread surface, a certain quantity of heat created making the temperature of raw materials rise when it is pushed forward.

During this process, its physical state is gradually transformed from glass state to high elastic state, and finally become a sticky flow, thus achieve the full plasticizing effect. The screw rotates steadily and continuously, can extrude the uniformly molten material from the molding die out to finish a plastic product of a certain shape. Then through cooling and shaping, the finish extruded products are processed.

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