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Cast form water borne coating and technique for preparing the same

A technology of water-based coating and preparation process, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., which can solve the problems of long coating time and many processes, and achieve the effect of good water dispersibility

Inactive Publication Date: 2009-08-05
深圳市景鼎现代科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of paint takes a long time and many processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Coating ratio: zircon powder 70kg, inorganic gel 1.4kg, polyvinyl acetate emulsion 4.46kg, water glass 5.48kg, silicone defoamer 0.05kg, sodium pentachlorophenate 0.01kg, water 18.6kg.

[0024] Preparation process: Add inorganic gel dry powder directly into water and mix and disperse in a high-speed disperser for 10 minutes, then add sodium pentachlorophenate and organic silicon defoamer and mix for 10 minutes, then add zircon powder and mix for 20 minutes, finally add water glass, polyacetic acid After mixing the ethylene emulsion for 30 minutes, adjust the paint to the consistency of the use state with water.

Embodiment 2

[0026] Coating ratio: zircon powder 50kg, mullite powder 25kg, inorganic gel 1.3kg, polyvinyl acetate emulsion 2kg, water glass 2.5kg, polyphosphate 0.5kg, sodium methylene naphthalene sulfonate 0.15kg, alkylphenol Polyoxyethylene ether 0.23kg, silicone defoamer 0.1kg, sodium benzoate 0.02kg, water 18.2kg.

[0027] Preparation process: Add the dry inorganic gel powder directly into water and mix and disperse in a high-speed disperser for 15 minutes, then add sodium benzoate, sodium methylene naphthalene sulfonate, alkylphenol polyoxyethylene ether, and silicone defoamer and mix for 20 minutes, then Add mullite powder and zircon powder and mix for 25 minutes, and finally add polymeric phosphate, water glass and polyvinyl acetate emulsion and mix for 25 minutes, then adjust the paint to the consistency of the use state with water.

Embodiment 3

[0029] Coating ratio: kyanite powder 40kg, bauxite powder 25kg, inorganic gel 1kg, polyvinyl acetate emulsion 3.5kg, silica sol 3.5kg, polymer phosphate 1kg, sodium alkylbenzene sulfonate 0.2kg, fatty alcohol polyoxygen Vinyl ether 0.3kg, n-butanol 0.39kg, pentachloronaphthol 0.01kg, water 25.1kg.

[0030] Preparation process: Add inorganic gel dry powder directly into water and mix and disperse in a high-speed disperser for 20 minutes, then add pentachloronaphthol, sodium alkylbenzene sulfonate, fatty alcohol polyoxyethylene ether, n-butanol and mix for 5 minutes, then add aluminum Mix bauxite powder and kyanite powder for 30 minutes, and finally add polymeric phosphate, silica sol, polyvinyl acetate emulsion and mix for 20 minutes, then adjust the paint to the consistency of the use state with water.

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Abstract

The invention relates to an auxiliary material for casting a mould, in particular to a casting mould water-based coating formulation for a sand mould or an expendable pattern casting (EPC), and a process for preparing the same. The casting mould water-based coating formulation consists of refractory powder, a suspending agent, a bonding agent, a surfactant, a defoaming agent, a corrosion remover and water. The process comprises the following steps: adding the suspending agent to the water directly, and mixing and dispersing the mixture in a high speed dispersion machine; adding auxiliary agents including the defoaming agent, the surfactant, the corrosion remover, and the like to the water, and mixing the auxiliary agents; adding the refractory powder to the mixture to be mixed; and adding the bonding agent to the mixture to be mixed, and then adding water to adjust the coating until the coating has the thickness in a using state to obtain the finished product. The coating prepared by the process has the effects that the coating ensures that a high-density low-viscosity coating has excellent suspension property and storage stability, a coating layer is not easy to crack after drying, the coating is advantageous to improve the capacity of the coating to resist high temperature metal corrosion, and the like.

Description

Technical field: [0001] The invention relates to an auxiliary material for casting molding, in particular to a casting water-based paint for sand mold or lost foam and its preparation process. Background technique: [0002] A mold coating is a thin layer of refractory coating applied to the surface of a mold. It is a physical suspension dispersion system, usually composed of refractory powder, carrier liquid, suspending agent, binder, thickener and additives. Among them, the refractory powder is the basis of the coating. It is suspended in the coating by means of a suspending agent, and is evenly coated on the working surface of the mold. After the carrier liquid evaporates, the binder makes the powder dry and form a dense coating. Protects the work surface. In order to make the casting coating have excellent physical and technological properties such as suspension, coating, leveling, permeability and flow resistance, in addition to choosing a suitable refractory powder, t...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/04
Inventor 孙鲁洪胡昊明
Owner 深圳市景鼎现代科技有限公司
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