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A method for preparing foundry sand with good collapsibility

A casting mold and collapsibility technology, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of low recycling efficiency, high cost, poor collapsibility of molding sand molds, etc., to reduce residual strength and improve collapse performance , Improve the effect of collapsibility

Inactive Publication Date: 2020-10-30
含山县能华铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For sand casting, it is necessary to apply a binder to bond the sand to make it into a casting mold before it can be cast. Water glass is a commonly used binder for sand casting. However, the sand mold after casting needs to be recycled to reduce cost, but the mold sand mold with water glass as the binder has poor collapsibility, resulting in low recycling efficiency and high cost

Method used

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  • A method for preparing foundry sand with good collapsibility
  • A method for preparing foundry sand with good collapsibility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing foundry sand with good collapsibility, the method comprises the following steps:

[0023] preparing a collapsing regulator, the collapsing regulator is made by combining organic fat, carbide micropowder and inorganic potassium compound;

[0024] Mix raw sand, water glass, water, clay and the collapse regulator to form the foundry sand with good collapsibility.

[0025] The organic fat is formed by mixing ethyl sorbate and dimethyl L-tartrate in a mass ratio of 3:1.2.

[0026] The carbide fine powder is silicon carbide, and the particle size of the silicon carbide is 1 μm.

[0027] The inorganic potassium compound is potassium pyrophosphate.

[0028] The mixing mass ratio of the organic fat, carbide fine powder and inorganic potassium compound is 8:4:1.

[0029] The raw sand is quartz sand with a particle size of 1.0 mm.

[0030] The clay is bentonite with a particle size of 1.0 mm.

[0031] The mixing includes mixing the raw sand, water glass...

Embodiment 2

[0035] A method for preparing foundry sand with good collapsibility, the method comprises the following steps:

[0036] preparing a collapsing regulator, the collapsing regulator is made by combining organic fat, carbide micropowder and inorganic potassium compound;

[0037] Mix raw sand, water glass, water, clay and the collapse regulator to form the foundry sand with good collapsibility.

[0038] Described organic grease is that ethyl sorbate and L-dimethyl tartrate are mixed by 3: 1.5 mass ratios.

[0039] The carbide fine powder is silicon carbide, and the particle size of the silicon carbide is 2 μm.

[0040] The inorganic potassium compound is potassium dihydrogen phosphate.

[0041] The mixing mass ratio of the organic fat, carbide micropowder and inorganic potassium compound is 10: 6: 2.

[0042] The raw sand is quartz sand with a particle size of 1.2mm.

[0043] The clay is bentonite with a particle size of 1.2mm.

[0044] The mixing includes mixing the raw sand,...

Embodiment 3

[0048] A method for preparing foundry sand with good collapsibility, the method comprises the following steps:

[0049] preparing a collapsing regulator, the collapsing regulator is made by combining organic fat, carbide micropowder and inorganic potassium compound;

[0050] Mix raw sand, water glass, water, clay and the collapse regulator to form the foundry sand with good collapsibility.

[0051] The organic fat is formed by mixing ethyl sorbate and dimethyl L-tartrate in a mass ratio of 3:1.3.

[0052] The carbide fine powder is silicon carbide, and the particle size of the silicon carbide is 1.5 μm.

[0053] The inorganic potassium compound is potassium tetraborate.

[0054] The mixing mass ratio of the organic grease, carbide fine powder and inorganic potassium compound is 9:5:1.6.

[0055] The raw sand is quartz sand with a particle size of 1.1mm.

[0056] The clay is bentonite with a particle size of 1.1 mm.

[0057] The mixing includes mixing the raw sand, water g...

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Abstract

The invention discloses a method for preparing casting molding sand with good collapsibility, and relates to the technical field of casting. The method comprises the following steps that a collapse modifier is prepared, the collapse modifier is composed of organic grease, carbide micro powder and inorganic potassium compound; and roughing sand, water glass, water, clay and the collapse modifier are mixed to form the casting molding sand with good collapsibility. According to the method, the normal-temperature strength and the residual strength of the molding sand can be effectively improved, pores and cracks can be generated in a bonding film in the molding sand after high-temperature by adding the collapse modifier prepared in the method, so that the continuity of the bonding film generated in the molding sand can be effectively destroyed, and then the residual strength is reduced, so that the collapsibility is remarkably improved, and better recycling is facilitated.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a method for preparing casting sand with good collapsibility. Background technique [0002] Sand casting is currently the most common and simplest type of casting in the state of the art and has been used for centuries. Sand casting is used to manufacture large parts such as gray cast iron, ductile iron, stainless steel and other types Sand casting of steel and other processes, the main steps include painting, mould, core making, modeling, melting and pouring, cleaning, etc. According to statistics, in my country or in the world, 60-70% of all castings are produced with sand molds. Compared with other casting methods, sand casting has low cost, simple production process and short production cycle. [0003] For sand casting, it is necessary to apply a binder to bond the sand to make it into a casting mold before it can be cast. Water glass is a commonly used binder fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 江进华
Owner 含山县能华铸造有限公司
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