Quick-drying water-based casting paint for large steel castings and its preparation method

A technology for casting coatings and steel castings, which is applied to casting molding equipment, coatings, cores, etc. It can solve the problems of low temperature resistance of coatings, long construction process, and slow drying speed, and achieve low cost and short drying time. , little effect on environmental pollution

Active Publication Date: 2021-01-26
CHINA ERZHONG GRP DEYANG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The patent of this invention aims at various problems existing in the use of existing water-based casting coatings, especially for large steel castings with a molten steel volume of more than 100 tons, such as slow drying speed, long construction process and low temperature resistance of the coating in casting production , poor adhesion, severe sand sticking in castings and other problems, the following technical solutions are proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] The preparation method of quick-drying water-based casting paint for large steel castings is carried out according to the following steps:

[0052] a. Take lithium-based bentonite paste, magnesium aluminum silicate paste, water-soluble modified phenolic resin, water-soluble modified silicone resin, low-viscosity polyvinyl butyral resin, modified zirconium British flour and water; the water is divided into 3 parts, so that the first part of water: the second part of water: the weight ratio of the third part of water is 3:5~6:1~2; preferably, the weight ratio of water is 3: 5.6:1.4;

[0053] Mix the above-mentioned lithium-based bentonite paste, magnesium aluminum silicate paste, water-soluble modified phenolic resin, water-soluble modified silicone resin, low-viscosity polyvinyl butyral resin and the first part of water to obtain solution A ; Preferably, a high-speed disperser is used for mixing, and the dispersion speed is 100-200r / min;

[0054] b. Then add modified z...

Embodiment 1

[0079] Raw materials by weight: 100 parts of modified zircon powder G1, 2 parts of lithium-based bentonite paste, 2 parts of aluminum magnesium silicate paste, 2.0 parts of water-soluble modified phenolic resin F1, 0.5 parts of water-soluble modified silicone resin 0.2 parts of low-viscosity polyvinyl butyral resin, 35 parts of water.

[0080]Preparation of casting paint: mix lithium-based bentonite paste, aluminum magnesium silicate paste with water-soluble modified phenolic resin, water-soluble modified silicone resin, low-viscosity polyvinyl butyral resin and 30% of the total water Add the water into the high-speed disperser according to the aforementioned ratio, first stir evenly at a speed of 150r / min, then add 100 parts of zircon powder and 80% of the remaining water, the slurry gradually becomes thicker after the zircon powder is added, at this time Adjust the distance between the dispersing disc and the bottom of the charging tank to make the vortex into a shallow basi...

Embodiment 2

[0082] Weigh 100 parts of modified zircon powder G1, 1.5 parts of lithium-based bentonite paste, 2 parts of aluminum magnesium silicate paste; 1.5 parts of water-soluble modified phenolic resin F1, 1.0 parts of water-soluble modified silicone resin, low viscosity 0.2 parts of polyvinyl butyral resin, 40 parts of distilled water.

[0083] The preparation of foundry paint is the same as in Example 1.

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Abstract

The invention relates to a quick-drying water-based casting coating for large steel castings and a preparation method thereof, and belongs to the technical field of foundry coatings. The quick-dryingwater-based casting coating for the large steel castings comprises the following materials, by mass, 100 parts of modified zircon powder, 1 to 5 parts of lithium-based bentonite paste, 1 to 5 parts ofaluminum magnesium silicate paste, 0.2 to 3 parts of water-soluble modified phenol resin, 0.1 to 1 part of water-soluble modified silicone resin, 0.1 to 0.5 part of the low-viscosity polyvinyl butyral resin and 20 to 40 parts of water. The quick-drying water-based casting coating for the large steel castings is characterized in that the suspension property is higher than or equal to 98% / (24H), the gas generation amount is smaller than 5 ml / g, the solid content is larger than 73%, the coating wear resistance is 0.02 g, coating is smooth without flowing, baking and coating can be repeatedly carried out many times, the baked coating is fully dried, the coating has no defects such as cracks, bubbles, pores and delamination, and the good sand resistant function is achieved during molten steelerosion and etching.

Description

technical field [0001] The invention relates to a fast-drying water-based casting coating for large steel castings and a preparation method thereof, belonging to the technical field of casting coatings. Background technique [0002] As a widely used basic process material in the foundry field, water-based casting coatings have many advantages, such as low market price, convenient use, less environmental pollution, and less health hazards to operators. However, compared with alcohol-based casting coatings Compared with the water-based casting coatings currently used, there are many disadvantages such as poor adhesion and weak erosion of high-temperature molten steel; coatings that use silica sol or water glass as binders often cause castings to stick to sand, especially when the coating is dry. The speed is slow, the construction process is long, the thickness of the coating is thin, and the thickness of a dry film is difficult to reach 0.5mm. When the next coating is applied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 白敏唐贤其
Owner CHINA ERZHONG GRP DEYANG HEAVY IND
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