Sand mold casting technology and equipment

Abstract

The invention relates to a sand mold casting technology comprising steps that: modeling sand is manufactured, wherein casting sand with a size of 40-70 meshes are added to 1-3% of water glass; the mixture is uniformly mixed in a fracturing blender; molding and core-making are carried out; a manufactured mould cavity is vibrated on a vibration platform; casting is carried out during vibration; when a metal solution starts to solidify, the vibration step is stopped. The equipment suitable for the sand mold casting technology comprises a lower platform rack which is used for supporting an upper platform rack used for bearing the mould cavity, wherein the supporting is realized by using a rubber spring. A high-frequency motor used for generating vibration is arranged on the upper platform rack. The equipment and the technology are advantaged in that: the technology and the equipment are environment-friendly; reproducibility for used sand recycling is good; and collapsibility of used sand is good.

Description

technical field [0001] The invention relates to a sand casting process and vibration casting equipment. Background technique [0002] The coal powder in the green sand is decomposed by heat, releasing a large amount of toxic gases such as benzopyrene, dioxin, hydrogen sulfide, carbon monoxide, etc., and the pollution is the most serious; the furan resin and phenolic resin in the resin sand produce strong gas in the molding and casting process. Irritant odors such as sulfur dioxide, sulfur trioxide, nitric oxide, etc., especially the production of dioxins and furans, which cannot be biodegraded in the environment and cause serious pollution to the environment; water glass is cheap, non-toxic, odorless and non-flammable , No harmful gas will be produced in the process of sand mixing, molding and casting, but the water glass sand has two major problems of collapsibility and reuse of old sand. Moreover, during the casting process of existing metal castings, since the sand box o...

AI Technical Summary

Problems solved by technology

[0002] The coal powder in the green sand is decomposed by heat, releasing a large amount of toxic gases such as benzopyrene, dioxin, hydrogen sulfide, carbon monoxide, etc., and the pollution is the most serious; the furan resin and phenolic resin in the resin sand produce strong gas in the molding and casting process. Irritant odors such as sulfur dioxide, sulfur trioxide, nitric oxide, etc., especially the production of dioxins and furans, which cannot be biodegraded in the environment and cause serious pollution to the environment; water glass is cheap, non-toxic, odorless and non-flammable , no harmful gas will be produced in the process of sand mixing, molding and casting, but the water glass sand has two major problems of collapsibility and old sand reuse and regeneration

Moreover, during the casting process of existing metal castings, since the sand box or the mold is in a static state, the bubbles in the metal solution are difficult to escape, which is not conducive to the floating of slag inclusions, thus making the finished castings prone to air bubbles, slag inclusions, looseness, and cracks and other defects seriously affect the quality of casting products

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