Molding sand adhesive for casting

Abstract

Sand sticking collapse agent for casting comprises raw material of weight per cent: soluble glass 94.5-98úÑ, dextrose powder 1.5-2.5úÑ, light calcium carbonate powder 0.2-2úÑ, suspending agent 0.2-0.5úÑ and antiseptic 0.1-0.5úÑ. It succeeds to integrate aforementioned raw material, has good high temperature collapsibility and anti-sticking ability, can fit to multiple hardening ways, cut baking time for CO2 and can increase recovery rate for used sand.

Description

technical field [0001] The invention relates to a collapsing agent with binding and collapsing functions for molding sand in the foundry industry. Background technique [0002] Sodium silicate molding sand, clay molding sand, and resin molding sand are the three major sand types in China. Compared with these three different molding sands, the clay molding sand has serious dust pollution and poor operating environment; the resin sand has obvious chemical pollution and the cost is too high. Comprehensively measured from the perspective of environmental protection and economics, sodium silicate molding sand is the most promising binder for green casting. It is non-toxic, odorless, environmentally friendly, and has a wide range of applications because it has good concessions. High core strength, especially suitable for the production of steel castings. But it has a fatal weakness: poor collapsibility, resulting in a lot of mold and core sand being...

AI Technical Summary

Problems solved by technology

[0005] The present invention takes water glass as the main component, introduces organic disintegrating agent and inorganic disintegrating agent at the same time, the suspending agent solves the problem that the inorganic disintegrating agent is easy to sink and stratify, and the preservative mainly solves the problem of easy deterioration of the organic disintegrating agent