Manufacturing method of zero-formaldehyde plywood

Abstract

The invention discloses a manufacturing method of zero-formaldehyde plywood, which comprises the following steps: (1) plate layout: taking a rectangular supporting plate as a datum, aligning, sequentially arranging and fixing single plates and formaldehyde-free adhesive films to form plywood, and adopting the rectangular supporting plates separating plywood, and preparing a plate assembly; (2) hot-pressing: preheating a hot press, putting the plate assembly in the hot press for prepressing, pressurizing the hot press after the prepressing is finished, and decompressing after the pressurizationis finished; (3) cold-pressing: putting the plate assembly after being depressed in a cold press for pressurizing and cooling; and (4) molding: separating the plywood after cold-pressing in the plateassembly from the rectangular supporting plates, and molding the plywood according to specifications to prepare the zero-formaldehyde plywood. The invention can produce the zero-formaldehyde plywoodon a large scale and has better product quality as well as higher production efficiency.

Description

Technical field [0001] The invention relates to a manufacturing method of zero-formaldehyde plywood. Background technique [0002] Plywood is a household material that people use more in daily life, and it is a kind of man-made board. Ordinary plywood has a high formaldehyde content, which has an adverse effect on the human body. Therefore, zero-formaldehyde plywood appears on the market. At present, the manufacturing method of zero-formaldehyde plywood generally uses a formaldehyde-free adhesive film to be combined with the veneer, and then puts it in a heating room for heating. After the adhesive film is melted on the veneer, it is taken out and cooled to obtain a finished product. The disadvantage of this method is that the heating room uses electric heating wire for heating. When multiple sets of film and veneer are put together in the heating room for heating, they will be heated unevenly, and some of the film has melted and some glue The film is still not heated, so it ca...

AI Technical Summary

Problems solved by technology

Ordinary plywood has a high formaldehyde content, which has adverse effects on the human body, so formaldehyde-free plywood has appeared on the market

At present, the manufacturing method of zero-formaldehyde plywood generally uses a formaldehyde-free film to be combined with the veneer, and then placed in a heating room to heat up. After the film melts on the veneer, it is taken out to cool down and the finished product is produced. The disadvantage of this method is that the heating room is heated by electric heating wires. When multiple groups of adhesive films and veneers are put into the heating room for heating, they will be heated unevenly. The film is still not heated, so it cannot be mass-produced; in addition, the film and the veneer are easily misaligned when heated, and the resulting plywood is of poor quality and production efficiency is low