Semi-open pouring process of iron mould covered with sand

Abstract

The invention discloses a semi-opened pouring process of a sand lined metal mold. The semi-opened pouring process comprises the following process steps: female mold manufacturing; metal mold manufacturing; mold assembling; sand molding; curing and drawing; box assembling; pouring; cooling; and mold opening. The semi-opened pouring process comprises the specific process steps: female mold manufacturing: selecting two female molds proper in size according to the boundary dimension of a casting; processing cavities same to contour of the casting in opposite faces of the two female molds accordingto the contour of the casting; and forming a plurality of cooling pipeline through holes in an equally spaced manner in two side walls of the two female molds. According to the semi-opened pouring process, by driving the pipe ends of a water inlet / out pipe, a first U-shaped pipe and a second U-shaped pipe by a double-shaft motor into the cooling pipeline through holes in the side walls of the female molds to communicate to cooling pipelines in the female molds to form a heat dissipating pipe distributed in an S shape and cooling the casting in the female molds by supplying cold water throughan external water supply pipe, the structure can meet the cooling demand of the sand lined metal mold transported on a female mold conveying rack, so that the female mold processing cost is lowered.

Description

technical field [0001] The invention relates to the technical field of sand-coated iron molds, in particular to a semi-open pouring process for sand-coated iron molds. Background technique [0002] Iron mold sand-covered casting has the characteristics of sand mold casting, that is, there is a rigid sand mold shell, so that the overall strength of the sand mold is high, no deformation, wide adaptability, easy demoulding of castings, reliable positioning, and high precision; The characteristics of membrane sand shell mold casting are convenient and fast molding. No matter what kind of casting sand mold, the molding can be completed within two or three minutes. The density of the molding sand and the surface hardness of the mold are guaranteed by the equipment, which is always consistent and does not need to be painted. Coating; not only obtained smooth castings, but also improved the shape and dimensional accuracy of castings; iron mold sand-covered casting also has the chara...

AI Technical Summary

Problems solved by technology

[0003] However, when the existing sand-covered casting process of iron molds is cooled, in order to improve the production efficiency of sand-coated iron molds, it is necessary to set corresponding cooling pipes inside the mother mold, and the setting of the cooling pipes requires metal cutting on the mother mold. Complicated, the processing cost is higher, so the existing process needs to be improved

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