One-time forming method for S-shaped pouring gate of large-sized shell casting

Abstract

The invention belongs to the technical field of casting, and discloses a one-time forming method for an S-shaped pouring gate of a large-sized shell casting. The method includes the following steps that an S-shaped pouring gate model is prepared, the pouring gate model is filled with gas or filler, a release agent or talcum powder is brushed onto the surface of the pouring gate model, the lower end of the pouring gate model is connected with a sprue base set pin sleeve of a forming model, and the upper end of the pouring gate model is connected with a positioning block on the top face of a sand box; modelling is performed based on the forming model with the pouring gate model; after modelling is completed and the casting is solidified, the gas or filler in the pouring gate model is released; and then the pouring gate model is taken out, and accordingly the S-shaped pouring gate can be formed on a casting mold. By means of the one-time forming method, there is no need to manufacture an S-shaped pouring gate mold, the working procedure of manufacturing a pouring gate core is omitted, the mold thickness of the S-shaped pouring gate core does not need to be considered, the mold thickness of the whole casting mold is reduced, and reusing can be achieved.

Description

technical field [0001] The invention belongs to the technical field of casting, and relates to a method for one-time forming of a serpentine runner for a large shell casting. Background technique [0002] In the production process of large-scale shell castings, clay sand, resin sand, water glass sand, cement sand, etc. are usually used for modeling, and oil sand, resin sand, water glass sand, and cement sand are used to make cores. The specific method is: use snakes The left and right core boxes of the sprue are respectively made into left and right sprue cores, and the two cores are combined with an adhesive, baked and solidified to form a complete serpentine sprue core. [0003] The core-making method of the serpentine sprue: oil sand, resin sand, water glass sand, cement sand, etc. can be used to make left-right symmetrical serpentine sprue cores, see figure 1 ; 11 is the left half core of the serpentine sprue, 12 is the right half core of the serpentine sprue, the left ...

AI Technical Summary

Problems solved by technology

[0007] When designing the casting method of the first method, usually the minimum sand intake of the core should be considered when manufacturing the runner core, and the minimum sand intake of the mold should also be considered when molding. Stacking increases the thickness of the mold

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