Water-based self-drying/quick-drying sand type casting coating and preparation method thereof
A foundry coating and self-drying technology, applied in foundry molding equipment, coatings, molds, etc., can solve the problems of poor suspension stability of coatings, no time thixotropy, and long self-drying time, and achieve good paintability and The effect of leveling, no deterioration of sand strength, and strong anti-hygroscopic ability
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[0032] Example 1: Water-based self-drying / fast-drying chromite powder coating
[0033] Components and content: 100 parts of chromite powder, 2 parts of dispersing suspension agent, 3 parts of room temperature self-crosslinking styrene-acrylic emulsion, 3 parts of quick-drying silica sol, 0.2 part of water reducing agent, 1.0 part of defoaming agent, 0.2 part of preservative Servings, 40 servings of tap water. The above-mentioned components are prepared according to the above-mentioned preparation method of the paint to prepare the paint.
[0034] The coating is used in acid self-hardening furan resin sand process to produce high chromium alloy steel impeller castings. The coating with a thickness of about 0.5mm can be completely dried in 2.5h under the conditions of 30℃~34℃ and relative humidity 65%~71%. After the process is completed, most of the coating is automatically peeled off in pieces. After shot blasting, only a small amount of sand sticks to the corners, and no pores ar...
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[0035] Example two: Water-based self-drying / quick-drying zirconium-containing composite silicate and zircon powder composite coating
[0036] Components and content: 80 parts of zirconium-containing composite silicate powder, 15 parts of zircon powder, 5 parts of talc powder, 5 parts of iron oxide red powder, 3 parts of dispersing suspension agent, 2 parts of self-crosslinking styrene-acrylic emulsion at room temperature, quick-drying 8 parts of silica sol, 1 part of water reducing agent, 1.5 parts of defoamer, 45 parts of tap water. The above-mentioned components are prepared according to the above-mentioned preparation method of the paint to prepare the paint.
[0037] The coating is used in acid self-hardening furan resin sand process to produce thick and large pump cover iron castings. The coating with a thickness of about 0.7mm can be completely dried in 2.5h under the condition of 30℃~34℃ and relative humidity 65%~71%. After the process is completed, most of the coating i...
Example Embodiment
[0038] Example 3: Water-based self-drying / quick-drying zirconium-containing composite silicate powder coating
[0039] Components and content: 100 parts of zirconium-containing composite silicate powder, 3 parts of dispersing suspension agent, 5 parts of room temperature self-crosslinking styrene-acrylic emulsion, 6 parts of quick-drying silica sol, 1.5 parts of water reducing agent, 0.2 parts of defoaming agent, 0.5 parts of preservative and 50 parts of tap water. The above-mentioned components are prepared according to the above-mentioned preparation method of the paint to prepare the paint.
[0040] The coating is used for CO 2 The process of blowing solidified sodium silicate sand to produce ordinary carbon steel ring castings. The coating with a thickness of about 0.8mm can be completely dried in 3.0h at an ambient temperature of 33℃~35℃ and a relative humidity of 54%~60%. After the process is completed, all the coatings are automatically peeled off in pieces. There is no s...
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