Valve body forming casting mold

Abstract

The invention discloses a valve body forming casting mold, and belongs to the field of casting molding. The mold comprises a sand box, a sand mold, a mold core and an anti-adhering coating, wherein the sand mold is of a double-layer structure; ordinary clay wet sand is adopted at a part in contact with the sand box, of the sand mold; resin sand is adopted at the part close to the mold core, of the sand mold; the mold core is of a double-core structure; double cores are arranged on one same horizontal line and are connected with each other through a connecting rod; horn-shaped casting holes are respectively formed in the left side and the right side of the sand box; the anti-adhering coating coats the contact part of the sand mold and the mold core and coats the outer side of the sand mold. By adopting the valve body forming casting mold, the resin sand can be effectively saved, the cost is reduced, the phenomenon that the mold core flows upwards under the action of the liquid metal pressure is effectively reduced, and the quality of a cast piece is improved.

Description

technical field [0001] The invention belongs to the field of casting modeling, and in particular relates to a valve body molding casting mold. technical background [0002] Casting is a common method of producing castings. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. [0003] Due to its high strength, high density and good surface finish, the castings produced by resin sand have high dimensional accuracy, clear external contours, compact structure, and high comprehensive quality of castings. At the same time, resin sand has good fluidity, easy compaction, adjustable demoulding time, high strength after hardening, and no deformation in the sub...

AI Technical Summary

Problems solved by technology

However, resin sand has the disadvantage of high cost, and the general molding, because of the pressure of liquid metal, the core will float up, and the wall thickness of the cast valve body will be uneven.

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