Device and method for manufacturing wood-plastic coated lumber composite

Patent metadata

Field	Value
Publication number	US-11865759-B2
Application number	US-201917047344-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Jan 8, 2019
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A wood-plastic/lumber composite co-extrusion feeder includes a frame, wherein at least one group of toothed conveying units, a tooth mark milling unit for milling tooth marks on an outer surface of a lumber, and a lumber co-extrusion mold are arranged on the frame in sequence, each toothed conveying unit includes 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 an adjustment unit, a first conveying channel having an adjustable height is formed between the upper toothed pressure roller and the lower-toothed pressure roller.

First claim

The invention claimed is:

1. 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.

2. The method according to claim 1 , wherein the wood-plastic coated lumber composite comprises the lumber core coated with a wood-plastic composite layer, and the surface of the lumber core is provided with the point-like gear pressing marks; the fiber mesh is further coated with the wood-plastic composite layer outside the lumber core with the point-like gear pressing marks, and the fiber mesh is coated and restrained by the wood-plastic composite layer; and the fiber is at least one of a carbon fiber, a glass fiber, a basalt fiber, an aramid fiber, a polyester fiber, a polyamide fiber and a polyacrylonitrile fiber.

3. The method according to claim 2 , wherein the fiber is a fiber pre-soaked with a prepreg resin matrix, and the prepreg resin matrix is at least one of a wood-plastic composite, polypropylene, polyethylene, polyvinyl chloride, polylactic acid and polystyrene; the wood-plastic composite layer and the wood-plastic layer outside the fiber mesh respectively comprise a first wood-plastic layer and a second wood-plastic layer which are connected, wherein the first wood-plastic layer is completely coated on the lumber core and the point-like gear pressing marks and forms a nail structure in the point-like gear pressing marks, the fiber mesh is arranged between the first wood-plastic layer and the second wood-plastic layer, and the second wood-plastic layer is completely coated on the fiber mesh.

4. The method according to claim 3 , wherein thicknesses of the first wood-plastic layer and the second wood-plastic layer are 0.1 mm to 2 mm and 1 mm to 5 mm respectively.

5. The method according to claim 2 , wherein at a front side of the at least one group of toothed conveying unit a rubber pressure roller units is arranged which comprises a lower rubber roller installed on a second fixed bearing seat and an upper rubber roller installed on a second movable bearing seat, after the second fixed bearing seat and the second movable bearing seat are connected by a second adjustment unit, a second conveying channel having an adjustable height adjusted by the second adjustment unit is formed between the upper rubber roller and the lower rubber roller, and an elastic rubber layer is sheathed on outer surfaces of the upper rubber roller and the lower rubber roller.

6. The method according to claim 5 , wherein the second adjustment unit comprises: a second sliding rod, a second fixed-length sleeve sheathed outside the second sliding rod, a second adjusting nut for adjustment and a second compressed spring with one end pressed against the second adjusting nut.

7. The method according to claim 2 , wherein the first adjustment unit comprises: a first sliding rod, a first fixed-length sleeve sheathed outside the first sliding rod, a first adjusting nut for adjustment and a first compressed spring with one end pressed against the first adjusting nut.

8. The method according to claim 2 , wherein each toothed conveying unit is provided with a group of limiting rubber roller sets, each limiting rubber roller set comprises a left limiting rubber roller and a right limiting rubber roller, and a limiting space is formed between the left limiting rubber roller and the right limiting rubber roller.

9. The method according to claim 8 , wherein two toothed conveying units are provided, and the two toothed conveying units are located between two groups of limiting rubber roller sets.

10. The method according to claim 2 , wherein the tooth mark milling unit comprises a first tooth mark milling mechanism for milling upper and lower surfaces of the lumber core and a second tooth mark milling mechanism for milling left and right surfaces of the lumber core, the first tooth mark milling mechanism comprises a first milling cutter frame and a first tooth mark roller located at a rear side of the first milling cutter frame, the second tooth mark milling mechanism comprises a second milling cutter frame and a second tooth mark roller located at a rear side of the second milling cutter frame, and the first milling cutter frame and the second milling cutter frame are respectively provided with a milling cutter.

11. The method according to claim 1 , wherein a pressing mark depth is 0.5 mm to 4 mm independently; and a pressing mark density is 1 piece/cm 2 to 20 pieces/cm 3 independently.

Assignees

• Univ South China Agricult

Inventors

• Ou Rongxian
• Wang Qingwen
• Yi Xin
• Tang Wei
• Sun Lichao
• Xu Junjie

Classifications

• B29C48/154 Primary

  Coating solid articles, i.e. non-hollow articles · CPC title

• B29C48/002

  combined with surface shaping · CPC title

• B29C48/06

  Rod-shaped · CPC title

• B29C48/21

  the layers being joined at their surfaces · CPC title

• B29C48/265

  Support structures or bases for apparatus, e.g. frames · CPC title