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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

Active Publication Date: 2014-06-25
广东省铸力铸材科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, to provide a drying speed, less / no pollution, safe use, low production cost and sintering Water-based self-drying / quick-drying sand casting coating with high stripping rate and preparation method of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Water-based self-drying / quick-drying chromite powder coating

[0033] Components and content: 100 parts of chromite powder, 2 parts of dispersing suspending agent, 3 parts of self-crosslinking styrene-acrylic emulsion at room temperature, 3 parts of quick-drying silica sol, 0.2 parts of water reducer, 1.0 part of defoamer, 0.2 parts of preservative parts, 40 parts of tap water. The above-mentioned components are prepared according to the preparation method of the above-mentioned paint.

[0034] The coating is used for the production of high chromium alloy steel impeller castings by the acid no-hardening furan resin sand process. A coating with a thickness of about 0.5mm can be completely dried within 2.5 hours at 30°C to 34°C and a relative humidity of 65% to 71%. After the process is completed, most of the coating is automatically peeled off in flakes. After shot blasting, only a small amount of sand sticks to the corner of the casting, and no pores are f...

Embodiment 2

[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 agent, 2 parts of self-crosslinking styrene-acrylic emulsion at room temperature, quick-drying 8 parts of silica sol, 1 part of water reducer, 1.5 parts of defoamer, 45 parts of tap water. The above-mentioned components are prepared according to the preparation method of the above-mentioned paint.

[0037] The coating is used in the acid no-hardening furan resin sand process to produce thick and large pump cover iron castings. A coating with a thickness of about 0.7mm can be completely dried within 2.5 hours at 30°C to 34°C and a relative humidity of 65% to 71%. After the process is completed, most of the coating is automatically peeled off in ...

Embodiment 3

[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 suspending agent, 5 parts of self-crosslinking styrene-acrylic emulsion at room temperature, 6 parts of quick-drying silica sol, 1.5 parts of water reducing agent, 0.2 parts of defoaming agent, 0.5 parts of preservatives, 50 parts of tap water. The above-mentioned components are prepared according to the preparation method of the above-mentioned paint.

[0040] The coating is used for CO 2 Ordinary carbon steel rim castings are produced by blowing and solidifying water glass sand process. A coating with a thickness of about 0.8mm can be completely dried within 3.0 hours at an ambient temperature of 33°C to 35°C and a relative humidity of 54% to 60%. After the process is completed, the coating is automatically peeled off in pieces, and there is no san...

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Abstract

The invention provides a water-based self-drying / quick-drying sand type casting coating and a preparation method thereof, wherein the water-based self-drying / quick-drying sand type casting coating is high in drying speed, little in pollution / pollution-free, safe to use, low in manufacture cost and high in sintering and stripping rate. The preparation method takes natural fireproof materials which are not calcined or electrically molten, such as zircon powder, chromite powder or zirconic composite silicate mineral powder, as basic materials, adopts a normal-temperature cured-type modified macromoleclar polymer as a main normal-temperature self-drying / low-temperature quick-drying binder, takes a quick-drying type silicate binder as a main high-temperature binder, adopts an efficient composite suspension dispersant high in fire-resistant degree and low in hot shrinkage rate and is added with proper amounts of efficient water reducing agents and defoaming agents to prepare a steel-iron casting water-based self-drying / quick-drying coating which is high in content of solid (nonvolatile matter) and low in permeability. The water-based self-drying / quick-drying sand type casting coating is excellent in thixotropy, brushing property and quick-drying function, thereby achieving the aim of saving energy, improving the environment and improving the quality of castings. The water-based self-drying / quick-drying sand type casting coating is applicable to the field of casting coatings.

Description

technical field [0001] The invention relates to a sand casting coating, in particular to a water-based self-drying / quick-drying sand casting coating and a preparation method of the coating. Background technique [0002] Sand casting coatings are mainly divided into alcohol-based coatings and water-based coatings according to the type of solvent. [0003] At present, alcohol-based coatings using methanol, ethanol and isopropanol as solvents are widely used in China. They are ignited and burned immediately after application, and have the characteristics of fast curing and less labor-hour consumption. [0004] Ordinary water-based coatings that use tap water as a solvent are generally placed in a heating furnace for a long time to dry after application, or are baked with a natural gas, coal gas, or diesel flame spray gun. They are safe, reliable, convenient to transport, low in price, clean and pollution-free, Suspension and stable brushing performance and other characteristic...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 冯胜山谢树忠刘春晶张传波梁家豪高运华李方义徐幼喜
Owner 广东省铸力铸材科技有限公司
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