A water-based coating for lost foam casting

Abstract

The invention discloses a water-based coating for lost foam casting, and the coating comprises the following components by weight percent: 15-18% of 150-200-mesh porzite powder, 5-8% of 80-150-mesh quartz powder, 12-18% of 200-320-mesh bauxite, 1.2-1.5% of silica sol, 1.5-3.0% of polyvinyl acetate emulsion, 0.1-0.4% of sodium carboxymethylcellulose, 0.15-0.35% of sodium alkylbenzene sulfonate, 0.15-0.35% of sodium sulfate, 0.1-0.3% of n-octanol, 0.10-0.18% of fatty alcohol polyoxyethylene ether and the balance water.

Description

technical field

[0001] The invention relates to the field of casting, in particular to the field of coating for lost foam casting. Background technique

[0002] With its unique advantages, lost foam casting is known as "green casting technology" and "21st century casting technology". Since its application in my country in the 1960s, after decades of continuous development, the application field of lost foam casting has been continuously expanded, and good economic and social benefits have been obtained.

[0003] Lost foam casting coating is one of the two key technologies of lost foam casting process. The performance of the coating directly affects the quality of the casting, which is significantly different from the traditional sand casting coating. The main purpose of traditional sand casting coatings is to prevent castings from mechanical sand sticking and chemical sticking sand, while coatings for lost foam casting have an important role in forming and maintaining cast...

Examples

Embodiment 1

[0024] A water-based paint for lost foam casting, the paint is composed of the following components in weight percentage: 15% of 150-200 mesh mullite powder, 8% of 80-150 mesh quartz powder, 12% of 200-320 mesh bauxite %, silica sol 1.5%, polyvinyl acetate milk 1.5%, sodium carboxymethyl cellulose 0.4%, sodium alkylbenzene sulfonate 0.15%, sodium sulfate 0.35%, n-octanol 0.1%, fatty alcohol polyoxyethylene ether 0.18 %, the balance being water.

Embodiment 2

[0026] A water-based paint for lost foam casting, the paint is composed of the following components in weight percentage: 18% of 150-200 mesh mullite powder, 5% of 80-150 mesh quartz powder, 18% of 200-320 mesh bauxite %, silica sol 1.2%, polyvinyl acetate milk 3.0%, sodium carboxymethyl cellulose 0.1%, sodium alkylbenzene sulfonate 0.35%, sodium sulfate 0.15%, n-octanol 0.3%, fatty alcohol polyoxyethylene ether 0.10 %, the balance being water.

Embodiment 3

[0028] A water-based paint for lost foam casting, the paint is composed of the following components in weight percentage: 16% of 150-200 mesh mullite powder, 6% of 80-150 mesh quartz powder, 15% of 200-320 mesh bauxite %, silica sol 1.5%, polyvinyl acetate milk 2.5%, sodium carboxymethyl cellulose 0.3%, sodium alkylbenzene sulfonate 0.25%, sodium sulfate 0.25%, n-octanol 0.2%, fatty alcohol polyoxyethylene ether 0.15 %, the balance being water.

[0029] The preparation method of the coating of above-mentioned embodiment one to three is:

[0030] a. Stir the mullite powder, quartz powder and bauxite base material in the paint grinding equipment, then add 35% of the total water to the base material, wet the base material and stir it;

[0031] b. Add silica sol, polyvinyl acetate milk, sodium carboxymethyl cellulose, sodium alkylbenzene sulfonate, sodium sulfate, n-octanol, and fatty alcohol polyoxyethylene ether to the base material that has been wetted and stirred. , and add ...

technical field

[0001] The invention relates to the field of casting, in particular to the field of coating for lost foam casting. Background technique

[0002] With its unique advantages, lost foam casting is known as "green casting technology" and "21st century casting technology". Since its application in my country in the 1960s, after decades of continuous development, the application field of lost foam casting has been continuously expanded, and good economic and social benefits have been obtained.

[0003] Lost foam casting coating is one of the two key technologies of lost foam casting process. The performance of the coating directly affects the quality of the casting, which is significantly different from the traditional sand casting coating. The main purpose of traditional sand casting coatings is to prevent castings from mechanical sand sticking and chemical sticking sand, while coatings for lost foam casting have an important role in forming and maintaining cast...

Examples

Embodiment 1

[0024] A water-based paint for lost foam casting, the paint is composed of the following components in weight percentage: 15% of 150-200 mesh mullite powder, 8% of 80-150 mesh quartz powder, 12% of 200-320 mesh bauxite %, silica sol 1.5%, polyvinyl acetate milk 1.5%, sodium carboxymethyl cellulose 0.4%, sodium alkylbenzene sulfonate 0.15%, sodium sulfate 0.35%, n-octanol 0.1%, fatty alcohol polyoxyethylene ether 0.18 %, the balance being water.

Embodiment 2

[0026] A water-based paint for lost foam casting, the paint is composed of the following components in weight percentage: 18% of 150-200 mesh mullite powder, 5% of 80-150 mesh quartz powder, 18% of 200-320 mesh bauxite %, silica sol 1.2%, polyvinyl acetate milk 3.0%, sodium carboxymethyl cellulose 0.1%, sodium alkylbenzene sulfonate 0.35%, sodium sulfate 0.15%, n-octanol 0.3%, fatty alcohol polyoxyethylene ether 0.10 %, the balance being water.

Embodiment 3

[0028] A water-based paint for lost foam casting, the paint is composed of the following components in weight percentage: 16% of 150-200 mesh mullite powder, 6% of 80-150 mesh quartz powder, 15% of 200-320 mesh bauxite %, silica sol 1.5%, polyvinyl acetate milk 2.5%, sodium carboxymethyl cellulose 0.3%, sodium alkylbenzene sulfonate 0.25%, sodium sulfate 0.25%, n-octanol 0.2%, fatty alcohol polyoxyethylene ether 0.15 %, the balance being water.

[0029] The preparation method of the coating of above-mentioned embodiment one to three is:

[0030] a. Stir the mullite powder, quartz powder and bauxite base material in the paint grinding equipment, then add 35% of the total water to the base material, wet the base material and stir it;

[0031] b. Add silica sol, polyvinyl acetate milk, sodium carboxymethyl cellulose, sodium alkylbenzene sulfonate, sodium sulfate, n-octanol, and fatty alcohol polyoxyethylene ether to the base material that has been wetted and stirred. , and add ...