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In the introduction of the previous article, we explained all the most important raw materials about wood-plastics （WPC) , and how to distinguish the quality of raw materials, and the quality of raw materials will affect quality.

Today we will continue to explain the next step, the raw materials ratio is good, will be poured into the granulator to stir and start granulation.

wpc machine

According to the raw materials mixed according to a certain ratio, the extruded plastic wood pellets are dried by high-temperature fusion, and bagged for use. The main function of the granulation equipment is to realize the process of pre-plasticizing wood powder and plastic, and uniformly mixing the biomass powder material and PE plastic under molten conditions to pre-process the production of plastic wood materials. Due to the poor fluidity of the composite wood melt, the design of the wood-plastic (WPC) granulator and the plastic granulator are not exactly the same. The design of the granulator is also different for different plastics. The granulator usually used for polyethylene usually uses a conical twin-screw extruder because polyethylene is a heat-sensitive resin, and the cone-type twin-screw extruder has strong shearing force and the screw length is parallel. The twin-screw extruder is short, reducing the residence time of the material in the barrel. The outer diameter of the screw is tapered from large to small, so the compression ratio is quite large, and the material can be plasticized more fully and evenly in the barrel.

wood composite decking workshop

Next time we will move to next step. Any question please don’t be hesitate to contact us by : info@greencoveringfactory.com