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Molding sand formula for casting

A technology of formula and molding sand, which is applied in casting molding equipment, molds, cores, etc., can solve the problems of poor repeated use, uneven condensation speed, shrinkage cavities, etc. , the effect of viscosity enhancement

Inactive Publication Date: 2018-02-09
JIANGSU MINJIANG MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a casting sand formula, which can solve the problems of cracks and shrinkage cavities caused by the uneven condensation speed of general foundry sand castings, and the poor effect of repeated use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A molding sand formula for foundry, consisting of 15 parts by weight of clay sand, 15 parts of quartz sand, 20 parts of Hao sand, 20 parts of magnesia, 8 parts of diatomaceous earth, 5 parts of talcum powder, and 3 parts of rosin Parts, 2 parts of titanium dioxide, 5 parts of coal powder, 25 parts of coupling agent, 10 parts of hardener, 5 parts of brown corundum powder, 10 parts of water.

[0011] Mix the above materials together and stir them evenly, then heat them, continue to stir them while heating, heat until the temperature reaches 220°C, stop heating, and cool to room temperature to obtain the finished casting sand formula.

Embodiment 2

[0013] A molding sand formula for foundry, consisting of 20 parts by weight of clay sand, 20 parts of quartz sand, 22 parts of Hao sand, 22 parts of magnesia, 11 parts of diatomaceous earth, 7 parts of talcum powder, and 5 parts of rosin Parts, 4 parts of titanium dioxide, 7 parts of coal powder, 30 parts of coupling agent, 13 parts of hardener, 7 parts of brown corundum powder, 12 parts of water.

[0014] Mix the above materials together and stir them evenly, then heat them, continue to stir them while heating, heat until the temperature reaches 220°C, stop heating, and cool to room temperature to obtain the finished casting sand formula.

Embodiment 3

[0016] A molding sand formula for foundry, consisting of 25 parts by weight of clay sand, 25 parts of quartz sand, 25 parts of Hao sand, 25 parts of magnesia, 15 parts of diatomaceous earth, 8 parts of talcum powder, and 6 parts of rosin. Parts, 5 parts of titanium dioxide, 10 parts of coal powder, 35 parts of coupling agent, 15 parts of hardener, 10 parts of brown corundum powder, 13 parts of water.

[0017] Mix the above materials together and stir them evenly, then heat them, continue to stir them while heating, heat until the temperature reaches 220°C, stop heating, and cool to room temperature to obtain the finished casting sand formula.

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PUM

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Abstract

The present invention relates to one, which is characterized in that: it consists of the following components in parts by weight: 15-25 parts of clay sand, 15-25 parts of quartz sand, 20-25 parts of haosha, 20-25 parts of magnesia, diatom 8~15 parts of soil, 5~8 parts of talcum powder, 3~6 parts of rosin, 2~5 parts of titanium dioxide, 5~10 parts of coal powder, 25~35 parts of coupling agent, 10~15 parts of hardener, brown corundum powder 5-10 parts, 10-13 parts of water; compared with the prior art, clay sand is used as a raw material, and the bonding performance is outstanding. The present invention is not only simple to manufacture, low in cost, but also suitable for secondary utilization after recovery of foundry sand formulations. Greatly reduce the cost of use. The expansion coefficient of hao sand and magnesia is small when heated. Mixing hao sand and magnesia with quartz sand is used as the raw sand of the foundry sand formula to reduce the expansion coefficient of the quartz sand, so that the condensation speed of the casting is uniform, and the surface of the casting is not easy to produce after condensation. Cracks and shrinkage cavities; foundry sand formulations can be made more viscous by adding coal powder and clay.

Description

Technical field [0001] The invention relates to the field of ore sand, in particular to a casting sand formula. Background technique [0002] Foundry sand is a material used in sand casting. Foundry sand plays an extremely important role in casting production. Casting waste caused by poor quality casting sand accounts for about 30-50% of total casting waste. The cohesive ability of casting sand is an important indicator to measure the quality of casting sand formulation. Existing casting sand usually uses water glass as a coupling agent to make water glass sand. Although the binding effect is better, Water glass is more expensive, so the manufacturing cost of casting sand is also relatively high, and in actual use, water glass sand will have problems such as difficulty in falling out and difficult regeneration of old sand. [0003] In the production process of castings, various casting defects such as sand holes, cracks, pores, shrinkage holes, etc. often occur, and the occurrence...

Claims

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Application Information

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IPC IPC(8): B22C1/08B22C1/18
CPCB22C1/08B22C1/181
Inventor 施路明
Owner JIANGSU MINJIANG MINING CO LTD