Plastic wood production process
Various methods have been developed for the production of plastic wood composite, the most important of which are:
- Extrusion
- Injection molding
- Compression molding
- Paltrogen
- Page formatting
Extrusion method
Among these methods, the extrusion method is more popular due to the continuous and uniform production of plastic wood profiles.
The extrusion process is used to mix two or more components of the formulation. This method can also be used to mix mill and fresh waste materials. The obtained polymer was converted into granules with the required dimensions by a granulating machine and then it was formed by the usual methods of injection, extrusion, blowing, etc. The capacity of extruders is expressed in terms of the amount of material they extrude per hour. For example, one hundred kilograms per hour can be used to determine whether the device is large or small.
Plastic wood production process
The most important part of the extruder is its screw. Most active extruders in the world have one screw, others two screws and sometimes four. One of the important features of multi-screw extruders is the good ability to mix materials and mix them. In addition, the extrusion efficiency of a two-screw machine is three times higher than that of a single screw. The use of extrusion method, especially double-screw extruders (two screws), is the most common method in the manufacture of plastic wood products.
plastic-wood extrusion process is such that plastic materials, wood flour and other additives in combination, flow freely from the extruder feed chamber on top of which into the spiral rod neck and from there the material is directed into the extruder. melting of materials during their transfer along the length of the screw and mainly by shear forces (friction).
At the end of the mold, the molten material is driven directly and in the form of a solid stream into the heated mold connected to the extruder, and after passing through the mold, plastic wood profiles are formed. Therefore, the shape of the extruded product is constant along its length.