Sand mold composite molding method

Abstract

The invention discloses a sand mold composite molding method, and belongs to the field of rapid casting. The method comprises the following steps: according to the complex structural characteristics of a casting mold, carrying out a layering process in the horizontal direction; according to the module structure of each divided area, determining the processing method: when a subarea of the casting mold contains a runner, the casting mold in the subarea is large and heavy and accounts for a large amount of volume, a digital control forming method is adopted; when a casting mold contains a complicated inner cavity structure, a dispersed / accumulated forming method is adopted; molding the lower part of the casting mold by cutting, after the molding of the lower part of the casting mold, molding the upper part of the casting mold by accumulating so as to finish the molding of the casting mold; and finally cleaning to remove the waste sands so as to obtain the sand casting mold. The method can achieve large and medium casting mold molding in any shape, and can improve the manufacturing speed and quality of casting mold by selecting proper partition positions.

Description

technical field [0001] The invention relates to the technical field of casting, and more particularly, to a rapid manufacturing method of casting molds. Background technique [0002] In order to improve the quality of single-piece and small-batch casting molds, reduce production costs, and reduce production cycles, the casting mold manufacturing technology based on the principle of discrete accumulation forming and direct numerical control cutting forming principles came into being. The most typical representatives of these two technologies are laser sintering forming technology and dieless casting forming technology, both of which can directly produce various shapes of casting sand molds without molds. [0003] The two technologies provide a convenient way to trial production of new products, but both have their own advantages and disadvantages. Discrete stacking can be formed in any shape, but layer-by-layer laying wastes time, especially when thick and heavy molds are inv...

AI Technical Summary

Problems solved by technology

[0003] The two technologies provide a convenient way for the trial production of new products, but both technologies have their own advantages and disadvantages. Discrete accumulation forming can be formed in any shape, but it is time-consuming to lay materials layer by layer, especially when thick and heavy molds are involved. Its disadvantages are long processing time and poor forming quality; casting mold CNC cutting forming has the advantages of fast and high-precision forming, but the casting mold with inner cavity structure needs to be disassembled and processed, and its time and quality are greatly affected

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