Low-carbon green molding sand material and preparation method thereof

A technology of green sand and bright carbon, which is applied in the direction of casting molding equipment, molds, cores, etc., can solve the problems of poor anti-sticking sand effect and poor high thermal shock resistance, and achieve low raw sand consumption and high impact performance. Improved effect

Pending Publication Date: 2020-10-30
曲阜市铸造材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a low-carbon green sand material and a preparation method thereof, which solves the problems of poor anti-sticking sand effect and poor high thermal shock resistance in the casting manufacturing process in the related art

Method used

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  • Low-carbon green molding sand material and preparation method thereof
  • Low-carbon green molding sand material and preparation method thereof

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Effect test

specific Embodiment 1

[0024] Specific embodiment 1, a low-carbon green sand material, comprising: 70 parts of bentonite, 8 parts of bright carbon, 26 parts of coal powder, 10 parts of silicate, and 8 parts of starch in parts by weight.

[0025] According to the user's requirements, the different production equipment of the user, and the requirements of the casting for sand mixing, the weight ratio of bright carbon and silicate in the components should be between bright carbon:silicate=1:1.25~1:2.5 Make adjustment controls.

[0026] Wherein, described bentonite adopts organic bentonite;

[0027] According to the relevant standards of my country's foundry industry, the particle size requirement for foundry coal powder is: "more than 95% of the particles should pass through the 0.106mm sieve hole (ie 140 mesh sieve)". The role of coal powder in the casting forming process mainly has four aspects: ① After the molten iron is injected into the sand mold, the coal powder in the molding sand is heated and...

specific Embodiment 2

[0030] Specific embodiment 2, a low-carbon green sand material, comprising: 67 parts of bentonite, 6 parts of bright carbon, 22 parts of coal powder, 9 parts of silicate, and 6 parts of starch in parts by weight.

specific Embodiment 3

[0031] Specific embodiment three, a low-carbon green sand material, comprising: 63 parts of bentonite, 5 parts of bright carbon, 18 parts of coal powder, 7 parts of silicate, and 4 parts of starch in parts by weight.

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Abstract

A low-carbon green molding sand material comprises, by weight, 60-70 parts of bentonite, 4-8 parts of lustrous carbon, 15-26 parts of coal powder, 5-10 parts of silicate and 3-8 parts of starch. A preparation method of the low-carbon green molding sand material comprises the steps that the bentonite, the lustrous carbon, the coal powder, the silicate and the starch of corresponding parts by weightare added into a grinding wheel type sand mixer or a rotor type sand mixer to form semi-finished products; the semi-finished products are stirred for 2-10 min; a stirred mixture is smashed to be between 200-300 meshes; and the smashed mixture is packaged to obtain finished products. Compared with traditional green molding sand materials, the low-carbon green molding sand material and the preparation method thereof have the advantages that added amounts of the bentonite and the coal powder can be lowered by 20%-30%, a casting mold made of the green molding sand is used for producing castings,the advantages that consumption of crude sand is low, and sand does not adhere to the surfaces of the castings are achieved, and green compression strength, hot wire drawing strength and impact performance of the green molding sand castings are all improved.

Description

technical field [0001] The invention relates to the technical field of green molding sand and its preparation, and more specifically relates to a low-carbon green molding sand material and a preparation method thereof. Background technique [0002] Wet mold casting refers to the casting method in which sand molds are poured directly without drying after they are made. Wet mold casting has low cost, high productivity, improved working conditions, and is easy to realize mechanization and automation. Green sand is the most widely used and most convenient molding method, accounting for about 60-70% of all sand usage, which can save ovens, save fuel and electricity, shorten production cycles and save costs. [0003] Green sand is composed of raw sand, clay, additives and water in a certain proportion. The role of molding sand in the casting process is very important. The casting waste caused by poor quality of molding sand accounts for more than 30% of the total casting waste....

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor高化民韦博曲磊高雁高政
Owner曲阜市铸造材料厂