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A kind of foundry sand for automobile flywheel containing bismuth bentonite

A technology of bentonite and casting molds, applied in casting molding equipment, casting molds, mold cores, etc., can solve the problems of remaining air holes, cracks, limited improvement of molding sand strength, and small free expansion volume on the casting surface, and achieve the reduction of trachoma in automobile flywheels , Elimination of sand inclusion defects, and improvement of surface energy

Active Publication Date: 2019-07-16
MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Flywheel shells are usually made of cast iron. Due to the imperfect performance of traditional casting sand, it is easy to cause problems such as pores, cracks, and even deformation on the surface of the casting. Based on this, the performance of the existing molding sand is improved. Bentonite is used as a Commonly used clay materials are widely used, but the molding sand added with bentonite is not effective in improving the pores and cracks of castings. The free expansion volume of bentonite is small, the price of colloid is low, and the amount of blue absorption is low. limited improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A foundry sand for automobile flywheel containing bismuthized bentonite, which is made of the following components in parts by weight: 80% quartz sand, 3% water glass, 8% bismuthized bentonite, 2% calcium stearate, 1.5% sodium carboxymethylcellulose, Coal powder 3, glass fiber 3, clay 2, magnesium aluminum silicate 3.5, water 8;

[0020] The clay is acid-activated.

[0021] Further, the particle size of the quartz sand is 0.8mm.

[0022] Further, the acid activation treatment of the clay is specifically as follows: calcining the clay at 400°C for 30 minutes, then cooling it naturally to 40°C, adding it to an alanine solution with a mass fraction of 10% and soaking it for 35 minutes, then taking it out, and adding Soak it in a nitric acid solution with a mass fraction of 5% for 40 minutes, then take it out, wash the surface of the clay with deionized water until it is neutral, and then dry it at 121°C until it reaches a constant weight.

[0023] Further, the water glas...

Embodiment 2

[0031] A foundry sand for automobile flywheel containing bismuthized bentonite is made of the following components in parts by weight: 90% quartz sand, 6% water glass, 10% bismuthized bentonite, 4% calcium stearate, 2.5% sodium carboxymethylcellulose, Coal powder 5, glass fiber 6, clay 5, magnesium aluminum silicate 4.5, water 12;

[0032] The clay is acid-activated.

[0033] Further, the particle size of the quartz sand is 1.0 mm.

[0034] Further, the acid activation treatment of the clay is specifically as follows: calcining the clay at 400°C for 30 minutes, then cooling it naturally to 40°C, adding it to an alanine solution with a mass fraction of 10% and soaking it for 35 minutes, then taking it out, and adding Soak it in a nitric acid solution with a mass fraction of 5% for 40 minutes, then take it out, wash the surface of the clay with deionized water until it is neutral, and then dry it at 121°C until it reaches a constant weight.

[0035] Further, the water glass is...

Embodiment 3

[0043] A foundry sand for automobile flywheel containing bismuthized bentonite, which is made of the following components in parts by weight: 85% quartz sand, 5% water glass, 9% bismuthized bentonite, 3% calcium stearate, 12% sodium carboxymethyl cellulose, Coal powder 4, glass fiber 4, clay 3, magnesium aluminum silicate 4, water 10;

[0044] The clay is acid-activated.

[0045] Further, the particle size of the quartz sand is 0.9 mm.

[0046] Further, the acid activation treatment of the clay is specifically as follows: calcining the clay at 400°C for 30 minutes, then cooling it naturally to 40°C, adding it to an alanine solution with a mass fraction of 10% and soaking it for 35 minutes, then taking it out, and adding Soak it in a nitric acid solution with a mass fraction of 5% for 40 minutes, then take it out, wash the surface of the clay with deionized water until it is neutral, and then dry it at 121°C until it reaches a constant weight.

[0047] Further, the water glas...

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Abstract

The invention discloses a casting sand containing bismuth bentonite for an automobile flywheel, and relates to the technical field of casting. The casting sand containing bismuth bentonite is prepared from quartz sand, water glass, bismuth bentonite, calcium stearate, sodium carboxymethyl cellulose, pulverized coal, glass fiber, argil, aluminum magnesium silicate and water. The casting sand containing bismuth bentonite for the automobile flywheel can make the air holes of the automobile flywheel reduced in the process of casting, and thus the defect of sand inclusion is eliminated, so that the sand holes of the automobile flywheel is also reduced significantly.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to casting sand for automobile flywheels containing bismuthized bentonite. Background technique [0002] The flywheel housing is one of the parts of the engine. The engine flywheel housing is located between the engine body and the gearbox. The engine flywheel housing is installed on the outside of the engine flywheel and is fixedly connected with the engine body and the gearbox. The flywheel housing is used for the cover through the flywheel chamber The flywheel plays the role of connecting the body, protection and carrier. [0003] Flywheel shells are usually made of cast iron. Due to the imperfect performance of traditional casting sand, it is easy to cause problems such as pores, cracks, and even deformation on the surface of the casting. Based on this, the performance of the existing molding sand is improved. Bentonite is used as a Commonly used clay materials are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 李孙德
Owner MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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