Method for improving stability of a die-molded composite door panel

Abstract

The invention relates to a method for improving the stability of a die-molded composite door panel, which comprises the following four steps of: 1, selecting materials, to be specific, selecting a piece of melamine decorative paper and a middle-density fiberboard as materials for producing the die-molded composite door panel; 2, softening the middle-density fiberboard by spring an ammonia or urea solution; 3, limiting the depth and height of patterned fluctuation as well as a curvature radius of the patterned fluctuation transition of a mold; and 4, selecting a hot press for simultaneously closing multiple layers, setting high temperature and low temperature for press plates of the hot press at intervals one by one in die molding, doing different arrangements on a pavement sequence of raw materials on a high-temperature press plate and a low-temperature press plate, and giving special parameters to a closing speed, pressure, pressure holding time and pressure reduction speed in the pressurizing process so as to solve the stress balance problem of the die-molded composite door panel on different aspects. According to the invention, a set of feasible method is provided to guarantee the flatness of the die-molded composite door panel, reduce the fracture damage and guarantee the product quality.

Description

technical field [0001] The invention relates to the processing of laminates, in particular to a method for improving the stability of a composite door panel molded with melamine decorative paper and medium-density fiberboard. Background technique [0002] In recent years, the panels of wooden decorative doors have become popular to be made of molded composite panels of melamine decorative paper and medium density fiberboard. This layered board has the advantages of smooth and wear-resistant surface of melamine decorative paper, simple processing equipment and process, and various molded patterns. It is favored by manufacturers of wooden composite doors and decorative materials, but due to the asymmetry of many factors such as the material, density, thickness, thermal expansion and contraction, wet expansion and dry contraction, and molded ductility of the second-layer material, the composite The stability of the whole board is poor, and it is easy to warp and deform, which c...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the panels of wooden decorative doors have become popular to be made of molded composite panels of melamine decorative paper and medium density fiberboard. This layered board has the advantages of smooth and wear-resistant surface of melamine decorative paper, simple processing equipment and process, and various molded patterns. It is favored by manufacturers of wooden composite doors and decorative materials, but due to the asymmetry of many factors such as the material, density, thickness, thermal expansion and contraction, wet expansion and dry contraction, and molded ductility of the second-layer material, the composite The stability of the whole board is poor, and it is easy to warp and deform, which will cause deformation of the composite door and even affect the use

The poor stability of the composite of melamine decorative paper and medium density fiberboard is a problem, and there is no relevant report on overcoming this problem so far

CN100408288 announced the patent technology of Mr. Qian Jun's "Hot Pressing Process for Improving the Stability of Solid Wood Composite Panels", which is a technical proposition for improving the stability of solid wood composite panels purely from the hot pressing process. This patented technology still cannot completely solve the present application A series of technical problems aimed at the stability of the two-layer molded composite door panel