Anti-veining additive for casting, preparation method and application method

An additive and veining technology, applied in the field of foundry materials, can solve the problems of poor strength of coated sand and inability to completely eliminate veining defects, and achieve the effect of reducing cracking tendency, simple and easy addition process, and improving strength.

Active Publication Date: 2022-06-28
YANCHENG RENCHUANG SAND IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of anti-veining additive can only eliminate 50%-95% of the veining, and cannot completely eliminate the veining defect, and the strength of the coated sand is not good

Method used

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  • Anti-veining additive for casting, preparation method and application method
  • Anti-veining additive for casting, preparation method and application method
  • Anti-veining additive for casting, preparation method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] An anti-veining additive for casting, which is composed of the following raw materials:

[0044] Glycerin 60%, glass fiber 10%, nano-titanium dioxide powder with particle size of 3nm 5%, graphite powder with particle size of 40nm 5.45%, polycarbosilane 9%, bentonite 9.5%, alkali metal oxide 0.05%, coupling agent H5501% . Alkali metal oxide is a mixture of sodium oxide, potassium oxide and lithium oxide in a mass ratio of 1:3:5.

[0045] The preparation method of the anti-veining additive is as follows:

[0046] (1) Weigh glycerin, nano-titanium dioxide powder, polycarbosilane, bentonite, alkali metal oxide, coupling agent H550 in proportion, and mix well;

[0047] (2) The uniformly mixed material is placed in an environment with a humidity lower than 60HR and a temperature lower than 150℃ for 2-5h maintenance;

[0048] (3) adding glass fiber and nano-graphite powder in proportion to the cured material, and stirring the components evenly to obtain an anti-veining addi...

Embodiment 2

[0054] An anti-veining additive for casting, which is composed of the following raw materials:

[0055] 50% glycerin, 10% glass fiber, 10% nano titanium dioxide powder with particle size of 5nm, 10% graphite powder with particle size of 60nm, polycarbosilane 9.45%, bentonite 10%, alkali metal oxide 0.05%, coupling agent H5500. 5%. Among them, the alkali metal oxide is a mixture of sodium oxide, potassium oxide and lithium oxide with a mass ratio of 1:2:3.

[0056] The preparation method of the anti-veining additive is as follows:

[0057] (1) Weigh glycerin, nano-titanium dioxide powder, polycarbosilane, bentonite, and alkali metal oxide in proportion, and mix well;

[0058] (2) The uniformly mixed materials are placed in an environment with a humidity lower than 60HR and a temperature lower than 150℃ for 2-5h maintenance;

[0059] (3) adding glass fiber and nano-graphite powder in proportion to the cured material, and stirring the components evenly to obtain an anti-veinin...

Embodiment 3

[0062] An anti-veining additive for casting, which is composed of the following raw materials:

[0063] 70% glycerin, 5% glass fiber, 5% nano titanium dioxide powder with a particle size of 10nm, 5% graphite powder with a particle size of 100nm, 5% polycarbosilane, 8.99% bentonite, 0.01% alkali metal oxide, and coupling agent H5501% . Among them, the alkali metal oxide is composed of sodium oxide, potassium oxide and lithium oxide in a mass ratio of 1:5:8.

[0064] The preparation method of the anti-veining additive is as follows:

[0065] (1) Weigh glycerin, nano-titanium dioxide powder, polycarbosilane, bentonite, alkali metal oxide, coupling agent H550 in proportion, and mix well;

[0066] (2) The uniformly mixed materials are placed in an environment with a humidity lower than 60HR and a temperature lower than 150℃ for 2-5h maintenance;

[0067] (3) adding glass fiber and nano-graphite powder in proportion to the cured material, and stirring the components evenly to obt...

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Abstract

The invention discloses an anti-veining additive for casting, a preparation method and a use method. The anti-veining additive of the present invention comprises the following raw materials in mass percentage: 50-70% of glycerin, 5%-10% of glass fiber, 5%-10% of nano-graphite powder, 5%-10% of nano-titanium dioxide powder, 5%-10% of bentonite 10%, polycarbosilane 1%-10%, alkali metal oxide 0.01%-0.05%, coupling agent H550 0.01-1%, the sum of the above components is 100%; the alkali metal oxide is sodium oxide, At least one of potassium oxide and lithium oxide. The coated sand using the anti-veining agent of the invention has no veins on the casting surface, and can effectively relieve or eliminate the veining defects.

Description

technical field [0001] The invention belongs to the technical field of casting materials, and particularly relates to an anti-veining additive for casting, a preparation method and a use method. Background technique [0002] Casting is the foundation of modern industrial production. With the advancement of science and technology and the development of society, consumers have higher and higher quality requirements for castings. During the production process of coated sand casting, it is warmly welcomed by various foundry manufacturers because of its high sand core strength, low gas generation, high dimensional accuracy of castings, and good surface finish of castings. Coated sand is coated with organic resin and curing agent on the surface of silica sand, and the filled coated sand is solidified and formed by heating the core box. After the sand core is formed, the casting production can be directly carried out. The coated sand process can produce castings with simple or com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/04
CPCB22C1/04
Inventor 李卓情尹海军冯俊龙包羽冲秦申二
Owner YANCHENG RENCHUANG SAND IND TECH CO LTD
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