Device and method for manufacturing wood-plastic coated lumber composite

A method for manufacturing a wood-plastic coated lumber composite , comprising the following steps:

• 1. feeding a lumber core by a wood-plastic/lumber composite co-extrusion feeder , and processing the lumber core to form point-like gear pressing marks on the lumber core, wherein the wood-plastic/lumber composite co-extrusion feeder comprises a frame, at least one group of toothed conveying units, a tooth mark milling unit for milling tooth marks defining the point-like gear pressing marks on an outer surface of the lumber core, and a lumber co-extrusion mold, wherein the at least one group of toothed conveying units, the tooth mark milling unit, and the lumber co-extrusion mold are arranged on the frame in sequence, each toothed conveying unit comprises a lower toothed pressure roller installed on a first fixed bearing seat and an upper toothed pressure roller installed on a first movable bearing seat, and after the first fixed bearing seat and the first movable bearing seat are connected by a first adjustment unit, a first conveying channel having an adjustable height adjusted by the first adjustment unit is formed between the upper toothed pressure roller and the lower-toothed pressure roller;
• 2. weaving or winding a continuous fiber on the surface of the lumber core to form a fiber mesh;
• and
• 3. co-extruding outside the fiber mesh to form a wood-plastic layer to obtain a wood-plastic coated lumber composite.