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Sodium silicate moulding sand and preparation method thereof

A water glass and molding sand technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of poor air permeability and poor collapsibility, and achieve the effects of easy doffing, reducing scrap rate and ensuring quality.

Inactive Publication Date: 2016-04-13
WUXI LINGTONG CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For above-mentioned existing problems, the present invention provides a kind of water glass molding sand and preparation method thereof, to overcome the poor air permeability and the poor collapsibility of the water glass molding sand in the prior art, thereby improving the water glass molding sand. Air permeability and collapsibility make doffing extremely easy, ensuring the quality of castings and reducing the reject rate of castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the water glass molding sand that the embodiment of the present invention 1 provides comprises:

[0022] (1) take out raw yarn, the water glass of 6% raw yarn consumption, the straw powder of 3% raw yarn consumption, 0.8% water;

[0023] (2) Put the raw yarn into the sand mixer;

[0024] (3) Mix straw powder, water and water glass, then add in the sand mixer that is placed with raw yarn and mix, mix and grind for 6 minutes, obtain water glass molding sand.

[0025] In the preparation method of water glass molding sand provided in Example 1 of the present invention, the raw yarn is quartz sand, and the particle size of the quartz sand is 40 / 100 mesh, the mud content is less than or equal to 0.5%, the moisture is less than or equal to 0.5%, and the pH value is 6.5~7.5, loss on ignition less than or equal to 0.5%, angle coefficient less than or equal to 1.35, fine powder amount less than or equal to 1%.

[0026] In the preparation method of the ...

Embodiment 2

[0029] The preparation method of the water glass molding sand that the embodiment of the present invention 2 provides comprises:

[0030] (1) take out the water glass of raw yarn, 7% raw yarn consumption, the straw powder of 3.5% raw yarn consumption, 1.2% water;

[0031] (2) Put the raw yarn into the sand mixer;

[0032] (3) Mix straw powder, water and water glass, then add in the sand mixer that is placed with raw yarn and mix, mix and grind for 6 minutes, obtain water glass molding sand.

[0033] In the preparation method of water glass molding sand provided in Example 2 of the present invention, the raw yarn is quartz sand, and the particle size of the quartz sand is 40 / 100 mesh, the mud content is less than or equal to 0.5%, the moisture is less than or equal to 0.5%, and the pH value is 6.5~7.5, loss on ignition less than or equal to 0.5%, angle coefficient less than or equal to 1.35, fine powder amount less than or equal to 1%.

[0034] In the preparation method of th...

Embodiment 3

[0037] The preparation method of the water glass molding sand that the embodiment of the present invention 3 provides comprises:

[0038] (1) take out the water glass of raw yarn, 8% raw yarn consumption, the straw powder of 4% raw yarn consumption, 1.5% water;

[0039] (2) Put the raw yarn into the sand mixer;

[0040] (3) Mix straw powder, water and water glass, then add in the sand mixer that is placed with raw yarn and mix, mix and grind for 6 minutes, obtain water glass molding sand.

[0041] In the preparation method of water glass molding sand provided in Example 3 of the present invention, the raw yarn is quartz sand, and the particle size of the quartz sand is 40 / 100 mesh, the mud content is less than or equal to 0.5%, the moisture is less than or equal to 0.5%, and the pH value is 6.5~7.5, loss on ignition less than or equal to 0.5%, angle coefficient less than or equal to 1.35, fine powder amount less than or equal to 1%.

[0042] In the preparation method of the ...

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Abstract

The invention discloses sodium silicate moulding sand and a preparation method thereof, and belongs to the field of casting. In the sodium silicate moulding sand and the preparation method thereof, straw powder of a certain proportion is added, and therefore the problems that sodium silicate moulding sand in the prior art is poor in air permeability and collapsibility are solved, the air permeability and collapsibility of the sodium silicate moulding sand are improved, doffing is very easy, the quality of a casting is guaranteed, and the reject ratio of the casting is lowered.

Description

technical field [0001] The invention relates to the field of casting, in particular to a water glass molding sand and a preparation method thereof. Background technique [0002] Molding sand is a material used for molding in sand casting. Molding sand is generally made of molding materials such as foundry sand, molding sand binder and auxiliary additives in a certain proportion. Different binders are used in molding sand, which can be divided into clay sand, water glass sand, cement sand, resin sand, etc. Among them, clay sand, water glass sand and resin sand are the most used. [0003] The role of molding sand in foundry production is extremely important, and casting waste products caused by poor quality of molding sand account for about 30% to 50% of the total casting waste products. Therefore, molding sand must have high strength and thermal stability, good fluidity, certain plasticity, good air permeability and high collapsibility. [0004] However, the air permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18B22C1/02
CPCB22C1/188B22C1/02
Inventor 金松李如康
Owner WUXI LINGTONG CASTING CO LTD
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