Secondary sand-shooting molding technique for casting sand core

Abstract

The invention discloses a two-time sand shooting forming process for casting a sand core. Firstly a mould is provided with a small sand core mould cavity, in which a mould joint is different from a mould joint of the whole sand core, and a whole sand core mould cavity inside, and a sand inlet is arranged on each mould cavity; the small mould cavity is subjected to sand shooting to produce a small sand core; the small sand core is taken out, placed on a position corresponding to the whole sand core mould cavity, and subjected to mold spotting, and the sand is shot in the whole sand core mould cavity to produce the whole sand core. The process has the advantages of one-time forming and simple and quick operation; and for the formed sand core, no connector is existed, and no phenomenon of core breaking, burr and flap edge occurs, thereby effectively ensuring the quality of the sand core.

Description

technical field [0001] The invention relates to a casting process, in particular to a secondary sand-shooting molding process for casting mud cores with two types of parting surfaces for rapid casting. Background technique [0002] Since the shape and size of the cores are irregular and the distance between the cores is small, when casting cores with two types of parting surfaces, up to now, the foundry industry still uses the cores with two types of parting surfaces to be manufactured separately, and then the The clay cores of different shapes are bonded manually with glue to form a whole clay core. The disadvantages of this process are: 1. To manufacture two clay cores with different profiles, two sets of molds are needed, which increases the production cost; 2. The clay cores with two parting surfaces are artificially bonded, and it is difficult to avoid seams, burrs, and flashes. , and the scale is not accurate, and the core is prone to broken core at the bonding place,...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: 1. To manufacture two clay cores with different profiles, two sets of molds are needed, which increases the production cost; 2. The clay cores with two parting surfaces are artificially bonded, and it is difficult to avoid seams, burrs, and flashes. , and the scale is not accurate, and the core is prone to breakage at the bonding place, which affects the quality of the casting

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