Three-box modeling process for medium thin-wall frame castings

Abstract

The invention provides a three-box modeling process for medium thin-wall frame castings. The process comprises the following steps: lower box modeling: lower sand box sample plates are modeled; one part of pouring systems needing embedment are placed; the lower sand box sample plates are taken out after sand loading; and two sample plates are adopted for drawing and modeling from two sides; and upper box modeling: upper sand box sample plates are modeled; paint is coated on the modeled sand boxes and sand cores; and pouring is prepared after core unloading, box closing, box pressing and box clamping. The process uses precise-positioned sample plates for modeling, so that the box overturning times and the sample taking process through box opening after modeling are reduced, meanwhile, the middle box modeling process is simplified, the number of the sand cores is reduced, in particular, the more prominent effect is achieved in a casting process of large and medium castings, and a reference process is provided for three-box modeling of the large and medium castings.

Description

technical field [0001] The invention relates to the field of sand casting, in particular to a three-box molding process for medium-sized thin-walled frame castings. Background technique [0002] Sand gravity casting is a casting method in which the mold sand with certain performance is compacted with different compactness to form a mold and a sand core, and the metal liquid is injected into the mold by gravity. It has wide applicability and short production cycle. , low price and other advantages. For medium-sized complex thin-walled frame castings, due to the complex contour structure of the castings, the internal multi-cavities, bosses, thin walls and complex curved surfaces, it is difficult to process and shape, and sand gravity casting is used for one-time molding. [0003] For medium-sized castings, the size of the sand box used is relatively large, and the weight of the sand box is heavy during molding. Sometimes, three-box molding is required according to the structu...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the prior art, and provides a three-box molding process for medium-sized thin-walled frame castings, which solves the problem of multiple overturning of the box during the molding process and the need to open the box to take out the shape after molding, which makes the process complicated. problems, while simplifying the molding process of the middle box

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