Manufacturing method of integrated gypsum mold with core and shell based on light curing rapid prototyping

Abstract

The invention discloses a core-shell type integrated gypsum casting mold manufacturing method based on rapid light-curing molding, and belongs to the field of rapid manufacturing of gypsum casting molds. The core-shell type integrated gypsum casting mold manufacturing method comprises: 1) manufacturing a resin member mold for gypsum casting mold fillinga by using rapid light curing molding equipment; 2) preparing a slurry, wherein the slurry comprises alpha calcium sulfate hemihydrate, quartz powder, bauxite, talc powder, C fiber, silica sol, magnesium sulfate and the balance of water; 3) in avacuum injection molding machine, carrying out mold filling casting on the resin member mold prepared in the step 1) and the slurry prepared in the step 2), and standing until solidifying after the casting so as to prepare a gypsum billet; and 4) sintering the gypsum billet to removing the resin member mold so as to prepare the gypsum casting mold. According to the present invention, with the method, the rapid manufacturing of the complex-structure part gypsum casting mold is achieved, the production process with characteristics of low cost and short production period is provided for the manufacturing of the low-melting point metal casting member with characteristics of complex structure and high surface quality, and the problems in the suspension beam, the inner cavity channel and othertraditional sand mold processes can be solved.

Description

technical field [0001] The invention belongs to the technical field of gypsum rapid manufacturing, and in particular relates to a method for manufacturing a core-type-shell integrated gypsum casting mold based on light-curing rapid prototyping. Background technique [0002] Gypsum molds have the advantages of low cost, short production cycle, and good dimensional stability, but the gypsum mold manufacturing process currently used in production still has the following deficiencies: traditional gypsum mold manufacturing is mainly for low-melting point metals with relatively simple appearance features Material casting, for functional structural parts such as small and complex structures and suspended structures, it is difficult to manufacture using this process due to the difficulty in prototype manufacturing and the fluidity of gypsum slurry; usually the initial setting time and final setting time of hemihydrate gypsum are between a few minutes and Within tens of minutes, the ...

AI Technical Summary

Problems solved by technology

[0002] Gypsum molds have the advantages of low cost, short production cycle, and good dimensional stability, but the gypsum mold manufacturing process currently used in production still has the following deficiencies: traditional gypsum mold manufacturing is mainly for low-melting point metals with relatively simple appearance features Material casting, for functional structural parts such as small and complex structures and suspended structures, it is difficult to manufacture using this process due to the difficulty in prototype manufacturing and the fluidity of gypsum slurry; usually the initial setting time and final setting time of hemihydrate gypsum are between a few minutes and Within tens of minutes, the production cycle is extremely short and the production efficiency is high, but the manufacturing time of the prototype resin parts used for pouring gypsum is much longer than the molding time of plaster casting molds, especially for prototype resin parts with complex structures, the production cycle is longer, The advantages of high production efficiency of gypsum casting cannot be fully utilized; the theoretical water demand of mold gypsum is only 18.61%, in order to ensure the fluidity requirements of mold gypsum, its actual water demand is as high as 60% to 80%, which reduces its mechanical properties

[0003] Therefore, the traditional method of manufacturing plaster molds with complex structures is difficult to implement, the production cycle is long, the production cost is high, and the accuracy is difficult to guarantee, which makes it difficult to cast low-melting point alloy parts with complex structures through plaster molds.

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