Preparation method of composite door sheet

Abstract

The invention discloses a method for preparing a composite door panel. The operation steps are as follows: (1) cutting: decontamination treatment is performed on the raw materials, ingredients are prepared according to the requirements of the drawing, and the wooden frame, filler board and surface board are cut; (2) high temperature treatment : Carry out high-temperature treatment on the wooden frame, filler board, and surface board; (3) Thickness sanding; (4) Gluing and forming embryos; (5) Glue pressing: Send the slabs to the hot press, start the hot press, The temperature is controlled at 150°-170°, the compression time is 200s-300s, and the pressure is 4MPA-6MPA. After the hot pressing is completed, let it stand for 30-45min and remove the slab; (6) veneer the cooled slab Edge sealing, processing forming edge, processing assembly hole for assembly; (7) Spraying topcoat. The invention improves the preparation method, effectively prevents degumming and even warping of the composite board by controlling the moisture content of the composite board, and improves the appearance quality of the composite board.

Description

technical field [0001] The invention relates to the field of wood processing, in particular to a preparation method of a composite door panel. Background technique [0002] Nowadays, with the continuous improvement of people's living standards, especially people living in some cities, the requirements for personal home furniture are getting higher and higher. Wooden furniture is also the most widely used. Composite doors are one of the wooden doors. The first type is the door frame and door leaf made of plywood, fiberboard, particleboard, glued wood, blockboard, decorative board and other wood-based panels as the main raw materials. Because of the texture and color of natural wood, the wood composite door maintains the decorative effect of the wooden door, and at the same time, the performance of the wooden door is stable, so as to win the favor of many consumers. However, the quality of wood composite doors currently on the market is uneven, and its main reason is that the...

AI Technical Summary

Problems solved by technology

However, the quality of wood composite doors currently on the market is uneven, the main reason being that there are certain defects in their preparation methods.

[0003] In the existing method for preparing composite door panels, the influence of moisture content in wood on the quality of composite doors is ignored. If the moisture content is too high, during the hot pressing process, due to the high temperature of hot pressing, the solvent in the adhesive is easier to Move to the surface plate that is in direct contact with the hot pressing plate, and at the same time accelerate the diffusion speed of the water molecules in the adhesive, increase the humidity of the surface plate, and the sudden release of the internal stress of the slab will cause the warping and deformation of the slab surface, and at the same time cause the slab to be deformed during the cooling process. Medium-permeable glue, coupled with the sudden temperature difference and pressure of the indoor environment, will accelerate the evaporation of moisture inside the composite door, which will increase the humidity on the upper and lower surfaces of the slab, reduce the viscosity of the adhesive, and cause degumming between the composite board layers. At the same time, the internal stress of the slab is released suddenly, causing the slab surface to warp and deform