A film-coated sand shell mold casting process

Abstract

The invention belongs to the technical field of casting technology, and specifically relates to a casting process of a film-coated sand shell; the locking module in the process includes a support plate, a locking ring and a locking rod. A locking groove, a locking ring is provided inside the locking groove, a locking rod is threadedly connected to the middle of the locking ring, positioning grooves are symmetrically arranged at both ends of the bottom surface of the locking ring, and the inside of the positioning groove is slidingly connected There is a positioning block, and the inner end of the positioning block is connected with the inner end surface of the positioning groove by a spring; the present invention squeezes and fixes the sand filling block on the top of the coated sand shell through the locking rod in the locking module, so that the metal The support mold gland can conveniently and stably lock the sand filling blocks of different heights, effectively improving the casting quality of the coated sand shell mold; and the present invention arranges a rotating plate at the bottom end of the side wall of the locking groove, so that the positioning block The outer end can be squeezed into the positioning groove stably and easily, which enhances the convenience of the coated sand shell mold casting.

Description

technical field [0001] The invention belongs to the technical field of casting technology, in particular to a film-coated sand shell mold casting technology. Background technique [0002] The green sand casting process is widely used in foundry enterprises because of its short production cycle, unlimited product batch size, convenience and flexibility; but also because the quality stability and dimensional accuracy of castings produced by this process are not high enough. The production of auto parts that cannot meet the higher requirements, usually everyone's improvement method is to configure the coated sand shell core in the green sand cavity to stabilize the surface quality of the casting and improve the dimensional accuracy of the casting; but this improvement process is still used Green sand is used as a carrier, and this process is still a green sand casting process. For this reason, supporting sand treatment facilities and molding equipment must be invested, so the i...

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Problems solved by technology

[0004] Although the casting process of this invention is simple and easy, the labor intensity is small, the cost is low, and it can effectively stabilize the surface quality of the casting and improve the dimensional accuracy level of the casting, but the invention still has the following problems: When the sand filling block on the top of the membrane sand shell is fixed, the integrated fixing structure provided at the end of the rotating metal support mold gland cannot conveniently and effectively fix the top surface of the sand filling block, and it is also inconvenient to disassemble the fixing structure , and when faced with sand filling blocks of different heights, it is necessary to replace different metal backing mold glands for fixing, which not only wastes time, but also causes an increase in casting cost, and also affects the casting quality and processing accuracy of the coated sand shell mold

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