Wood products are mainly production process

??? For existing technology, the process comprises forming wood products in several forms: extrusion molding, calender molding, injection molding, press molding and the like. WPC basic process is as follows:

???? Waste plastic, sawdust, straw and other raw material crushing and grinding �� ??treatment �� flour mixed with plastics extrusion processing �� ??granulation �� �� �� cooling stereotypes traction �� cut to length �� finished. stainless deck screws

Because of different processing equipment, there will be a corresponding change in the specific process.

???? In the calender molding, the process is divided into two: one is the mixed material into the extruder and extruded through a die plate, and then roll formed into different sizes of sheet metal; while the other is the materials are mixed in an open mill mill, after mixing into pieces, crushed and then rolled out into a sheet. Currently, calendering way in China has imported foreign production equipment.wood plastic composite decking china

In the extrusion molding process, the molding and plastic processing methods and equipment commonly used in profiles, similar to the sheet metal processing technology. Method: the mixed material into an extruder, extruded through a die or plate sections of different cross-sectional shapes. Can be divided into single-screw extruders and twin-screw two forms, depending on the circumstances can choose different extruder. Twin-screw extruder because of its high yield and excellent processability, and more and more people are welcome. But the twin-screw extruder has a large drawback is that one-time investment of acquisition costs over larger than a single-screw extruder 2 to 3 times. In the molding process, the mold is very important role, it can be said that wood processing techniques, in addition to formulation technology, the key technique is the second die. At present, we can say our wood products for the die technology is still in development and testing phase, there are a lot of research needs to be done.

???? In extrusion, the extruded from the die plate shaped products or require cooling stereotypes. Typically, stereotypes divided into two kinds of dry and wet, you can also have the form of a water-cooled and air-cooled. Choose which shape the form, depending on the circumstances of their products may be made??. If the wood flour content is higher in proportion higher than the plastic case, to choose the form of dry-type setting and cooled, and vice versa on the selection of wet water. backyard patio wpc lumber

Cold stereotypes. But because technology is a new type of wood molding technology, therefore, several forms of stereotypes sometimes need to swap cross-use, this visual circumstances and its own technology and flexible selected. After styling products (including profiles, sheet metal) generally after a traction device, making it a stable continuous production, thus completing the entire extrusion process.