Double-faced uniform forming method of gypsum plaster ceiling board

Abstract

The invention relates to a double-faced uniform forming method of a gypsum plaster ceiling board. A manufacturing mould of the gypsum plaster ceiling board is divided into a pair of upper and lower mould group; an upper mould comprises an upper soft mould and an upper hard mould, and a lower mould comprises a lower soft mould and a lower hard mould; and the soft moulds are fixedly connected with the hard moulds. The double-faced uniform forming method comprises the following steps of: firstly pouring a right amount of gypsum slurry into the upper mould during work, wherein the gypsum slurry is spread and uniformly distributed in the upper mould and uniformly vibrated to be formed; after the gypsum slurry is dried to a certain degree, starting to pour the gypsum slurry into the lower mould; after the gypsum slurry is spread and uniformly distributed in the lower mould, covering the upper mould on the lower mould, combining and extruding the upper and the lower moulds, and integrally and uniformly vibrating for forming, wherein after the upper and the lower moulds are sufficiently solidified, gypsums inside the upper and the lower moulds are formed into a whole. The upper and the lower moulds both comprise an inner mould and an outer mould, wherein the inner mould is the soft mould (made from silica gel and other materials) so as to be convenient for the gypsums to be smoothly separated from the soft mould after formed, and a flash cave is arranged in the periphery of the lower soft mould so as to be convenient for storing the superfluous gypsum slurry of the lower mould when the upper and the lower moulds are combined; and the outer mould is made of hard materials (aluminum alloy and the like) so as to be convenient to fix and move. By adopting the method, the problems of rough surface, multiple pores and lower strength of a common gypsum plaster board are solved; and the produced gypsum plaster ceiling board has few pores, fine and smooth surface and high rigidity.

Description

technical field [0001] The invention relates to the field of gypsum board production, in particular to a double-sided uniform molding method for a gypsum ceiling. Background technique [0002] Gypsum ceiling is widely used in architectural decoration because of its light weight, environmental protection and breathability. At present, the most commonly used method for making gypsum ceilings is to inject gypsum slurry into a flexible mold, and after the gypsum is solidified and formed, the mold is removed to obtain a gypsum board. The simple production method is to use only one bottom mold, inject the gypsum slurry with adjusted ratio into the cavity of the bottom mold to solidify and form, and remove the bottom mold to get the gypsum board. The disadvantage of this method is that the surface shape of the gypsum board is difficult to control , rough surface, many pores, low strength, easy to break. The improved method is to use two upper and lower molds. The lower mold with ...

AI Technical Summary

Problems solved by technology

Because it is handmade, the thickness of the gypsum board reinforcement ribs produced by this method is different, there are still many pores on the surface and inside, and the surface quality is not high. When there are high requirements for surface finish and strength, this method cannot meet Require

There are other similar improvements, but they still do not solve the problem of mass production of high-quality gypsum ceilings

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