Plastic Wood Molding Process

The process of plastic wood molding mainly includes the pulverization, cleaning, drying and granulation of plastics, the drying, processing of wood powder, the compounding of plastic and wood, and the molding process of products. 1. Wood powder formula and compounding: The formula of wood powder and plastic is the core technology in plastic wood processing technology, and its quality will directly affect the processing technology and product quality of the product. Foreign companies generally do not introduce and transfer the formula technology, usually only transfer sales equipment, therefore, the formula technology is the core technology here. The plastic wood formula is generally composed of plastic, wood powder and various additives. The proportion varies depending on the processing equipment, and also varies depending on the use and requirements of the product. Before processing, according to the proportion of the formula, the wood powder, plastics and additives are placed in a high-speed mixer for mixing, mainly for the purpose of uniformly mixing several raw materials and auxiliary agents, and preparing for extrusion production or compression injection. Second, the selection and treatment of wood powder: wood powder used in plastic wood technology generally does not have strict requirements, wood powder of various types of wood and various plant fibers can generally be used (sawdust produced during wood processing, After the scraps are crushed, the effect on the processing is not large. The main requirement is that the particle size of various wood powders is generally 20-100 mesh. On this basis, it is necessary to ensure that the wood powder and plastic are dried before mixing. . Generally, the moisture content of wood flour should be controlled within 3%. The drying equipment can be electrically heated, or dried by microwave heating or naturally dried. The dried wood powder should be stored in a dry place (indoor), and it is not allowed to absorb moisture twice, otherwise it will have a greater impact on processing. It is necessary to mention that when using a venting-type extruder, especially a twin-screw extruder to process wood-plastic materials, the wood powder can be dried without special treatment. Perform extrusion processing.