Molding sand formula

Abstract

The invention discloses a molding sand formula. The molding sand formula consists of the following components in parts by weight: 16-23 parts of clay sand, 17-24 parts of quartz sand, 8-15 parts of bentonite, 5-8 parts of zeolite powder, 3-6 parts of rosin, 2-5 parts of gypsum powder and 10-13 parts of water. The molding sand formula is outstanding in adhesion property, not only is simple to prepare and low in cost, but also is suitable for secondary utilization of recycled molding sand, and thus, the use cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a molding sand formula. Background technique [0002] Molding sand is a material used for molding in sand casting. Molding sand plays an extremely important role in casting production. The casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. The bonding ability of molding sand is an important indicator to measure the quality of molding sand. The existing molding sand usually uses water glass as a binder to make water glass sand. Although the bonding effect is better, but because water glass is more expensive, so The manufacturing cost of molding sand is also relatively high, and in the actual use of water glass sand, there will be problems such as difficulty in falling sand and difficult regeneration of old sand. Contents of the invention [0003] In order to overcome the above-mentioned technical problems exist...

AI Technical Summary

Problems solved by technology

The bonding ability of molding sand is an important indicator to measure the quality of molding sand. The existing molding sand usually uses water glass as a binder to make water glass sand. Although the bonding effect is better, but because water glass is more expensive, so The manufacturing cost of molding sand is also relatively high, and in the actual use of water glass sand, there will be problems such as difficulty in falling sand and difficult regeneration of old sand.