Used sand regeneration mechanism

Abstract

The invention relates to an used sand regeneration mechanism, which comprises an upper millstone and a lower millstone with up and down relative arrangement, one of the upper millstone and lower millstone can bear loading force and rotate relative to another millstone, an upper millstone surface is provided at the lower end of the upper millstone, a lower millstone surface positioned relative to the upper millstone surface and used for cooperating with the upper millstone surface for extruding and twisting the corresponding used sand particles, and an accommodation gap used for accommodating the corresponding used sand particles is provided between the upper millstone surface and the lower millstone surface. The invention provides the used sand regeneration mechanism with low use cost, and the used sand particles are difficult to be crushed during the regeneration of the used sand.

Description

technical field [0001] The invention relates to an old sand regenerating mechanism used for regenerating old sand produced in foundry production. Background technique [0002] In the foundry industry, whether clay sand casting or water glass sand casting is used, a large amount of waste sand, also known as old sand, will be produced. Almost all resin self-setting sand manufacturers use resin self-setting sand and old sand through mechanical friction. It is used for resin sand molding and core making after regeneration; some enterprises remove the dead clay film on the surface of some sand grains by impacting and rubbing the old clay sand, and replace all or part of the new sand in clay sand; these treatment methods are difficult to remove sand grains The dead clay and inert film coated on the surface can achieve limited regeneration effect, resulting in lower casting quality and lower performance. Most enterprises discard the old sand after several reuses and replace it wit...

AI Technical Summary

Problems solved by technology

The stripping force provided by these regeneration processes is limited, and the residual film on the old sand grains cannot be completely removed, and the quality of the regenerated sand is not very high; due to the need to provide a higher speed for the old sand shell, this requires relatively high equipment capacity. High strength increases the cost of the equipment. The old sand with high speed and low speed wears the equipment seriously, and the replacement frequency of the equipment is high, which also increases the cost of the equipment. At the same time, because the old sand particles are fragile, the old sand under high speed Sand particles impact and collide with each other, and old sand particles often break. With the increase of the demoulding rate of old sand particles, the greater the speed, impact force and friction required by old sand particles, the wear of equipment components and the old sand Particle breakage is more severe

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