Preparation method of environment-friendly veneer board

Abstract

The invention discloses a preparation method of an environment-friendly veneer board. The preparation method comprises the following steps that raw wood is processed, specifically the raw wood is dried, more specifically, wood pieces generated after annular cutting are placed into a drying chamber, the temperature is controlled to be 50-80 DEG C, and continuous drying is conducted for 12-24 h; adhesive applying is conducted, specifically, an adhesive is applied to the wood pieces; softening is conducted, specifically, the wood pieces are heated to be softened, the heating temperature is 50-70DEG C. the softening time is 0.1-0.4 h, and then the wood pieces are flattened through a press roller; pre-pressing is conducted, specifically, the wood pieces are subjected to assembling and then placed into a hot pressing machine to be pre-pressed, and then a rough board is obtained; edge cutting and hot pressing are conducted, specifically, the rough board is cut into a stock board, then hot pressing is conducted, and a board is obtained; and the board is repaired and polished, and finally the board is subjected to edge sawing forming and overhauling to obtain the veneer board. According tothe preparation method of the environment-friendly veneer board, through the adhesive prepared by the applicant, the holt melting performance of the adhesive is good, the temperature of the veneer board in pre-pressing is reduced, the adhesion performance of the adhesive is not affected, the wood pieces can be more easily adhered and flattened in low-temperature pre-pressing, and the veneer boardlayer is more compact and stable in structure.

Description

technical field [0001] The invention relates to the technical field of plywood production, in particular to a preparation method of an environment-friendly plywood. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. The existing adhesives used in plywood production generally use more thermosetting adhesives, and some adhesives have poor thermosetting properties, and the thermosetting process takes a long time, which is called insufficient viscosity. High temperature is required during pre-pressing to improve its adhesive performance, but the wood chips in the prior art are generally not very smooth, and they are all curled, which is not convenient for later pressing and forming. Th...

AI Technical Summary

Problems solved by technology

The existing adhesives used in plywood production generally use more thermosetting adhesives, and some adhesives have poor thermosetting properties, and the thermosetting process takes a long time, which is called insufficient viscosity. High temperature is required during pre-pressing to improve its adhesive performance, but the wood chips in the prior art are generally not very smooth, and they are all curled, which is not convenient for later pressing and forming. The higher temperature during pre-pressing makes the internal stress larger , easy to deform and open glue, affecting the quality and service life of plywood