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Water-soluble ceramic core and preparation method thereof

A ceramic core, water-soluble technology, used in cores, casting molding equipment, casting molds, etc., can solve problems such as low service life and adverse effects of surface roughness of castings, and achieve the effect of ensuring surface quality

Inactive Publication Date: 2018-02-27
东风精密铸造安徽有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The water-soluble core is dissolved or collapsed in water, and its advantage is that it is easy to remove the core, but the core will be corroded by the aqueous solution and water vapor during the core removal, the service life is not high, and the surface roughness of the casting is adversely affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A water-soluble ceramic core, comprising: 7-14 parts by weight of refractory aggregate, 60-70 parts by weight of salt, and 24-28 parts by weight of plasticizer. The surface of a water-soluble ceramic core is coated with one A layered waterproof membrane, the waterproof membrane comprising the following components: 32 parts by weight of resin, 3 parts by weight of curing agent and 50 parts by weight of solvent, wherein the resin is preferably a phenolic resin, and the curing agent is hexamethylenetetramine, The solvent is preferably acetone.

[0022] The plasticizer is preferably crude polyethylene glycol.

[0023] The refractory aggregate is 120 mesh fused corundum.

[0024] The film-forming method of the waterproof membrane is as follows: adding resin and curing agent to the solvent, fully stirring and uniformly, and natural air drying, then heating, and keeping the temperature at 100°C for 70 minutes.

[0025] A method for preparing a water-soluble ceramic core includes the ...

Embodiment 2

[0033] A water-soluble ceramic core, comprising: 91 parts by weight of refractory aggregate, 7.5 parts by weight of barium hydroxide, 1.5 parts by weight of potassium aluminate, and 8 parts by weight of water. The surface of a water-soluble ceramic core is coated Covered with a waterproof film, the waterproof film includes the following components: 32 parts by weight of resin, 3 parts by weight of curing agent and 50 parts by weight of solvent, wherein the resin is preferably a phenolic resin, and the curing agent is hexamethylenetetramine Amine, the solvent is preferably acetone.

[0034] The refractory aggregate is 120 mesh fused corundum.

[0035] The film-forming method of the waterproof membrane is as follows: adding resin and curing agent to the solvent, fully stirring and uniformly, and natural air drying, then heating, and keeping the temperature at 100°C for 70 minutes.

[0036] A method for preparing a water-soluble ceramic core includes the following steps:

[0037] S1, pr...

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PUM

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Abstract

The invention discloses a water-soluble ceramic core, comprising: 7-14 parts by weight of refractory aggregate, 60-70 parts by weight of salt and 24-28 parts by weight of plasticizer. The surface is coated with a waterproof film, and the waterproof film includes the following components: 32 parts by weight of resin, 3 parts by weight of curing agent and 50 parts by weight of solvent, wherein the resin is preferably phenolic resin, and the curing agent adopts hexamethylene base tetramine, the solvent is preferably acetone. The water-soluble ceramic core in the present invention is provided with a layer of waterproof film on its surface, which can effectively resist the soaking of water vapor when the core is removed, so as to ensure the surface quality of the core and the casting.

Description

Technical field [0001] The invention relates to the technical field of investment casting, in particular to a water-soluble ceramic core and a preparation method thereof. Background technique [0002] Metal casting is a process in which metal is smelted into a liquid that meets certain requirements and poured into a mold. After cooling, solidification, and cleaning, a casting with a predetermined shape, size and performance is obtained. Because the casting blank is almost formed, it can achieve the purpose of avoiding machining or a small amount of processing, reducing the cost and reducing the time to a certain extent. Metal casting is one of the basic processes in the modern machinery manufacturing industry. [0003] Ceramic core is the abbreviation of a kind of ceramic core used in the investment casting process. It is used as an adapter to form the cavity of the casting. Its function is to form the inner cavity structure of the casting, and to ensure the casting together with ...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C1/00
CPCB22C9/10B22C1/00
Inventor 鲁茂波
Owner 东风精密铸造安徽有限公司