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Water-base foundry coating and preparation technology thereof

A casting coating, water-based technology, used in casting molding equipment, manufacturing tools, coatings, etc., can solve the problems of low viscosity, uneven coating, gas generation pores, pinholes, etc., and achieve good bonding effect.

Inactive Publication Date: 2014-02-19
WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive gas generation of the existing coatings for cast iron pipe parts can easily cause defects such as pores and pinholes in the cast pipes; and the low viscosity of the coatings for existing cast iron pipe parts results in failure to coat or uneven coating. It not only affects the life of the mold, but also causes defects such as unevenness and even leakage on the surface of the cast pipe.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation technology of above-mentioned water-based foundry paint, realizes through the following steps:

[0019] 1) Prepare the above-mentioned water and casting coating;

[0020] 2) After dry mixing quartz powder, diatomaceous earth and bentonite for 0.5h, add water, and then wet mix silica sol, white mud, sodium hydroxymethyl cellulose and additives;

[0021] 3) Put the mixed water-based casting coating into a ball mill and mix for 4 hours before discharging.

Embodiment 1

[0023] A water-based casting paint, 270 mesh quartz powder, 8% diatomite for removing crystal water, 6% silica sol, 0.6% white mud, 0.1% methylol in proportion to the weight of the quartz powder Sodium cellulose, 4% bentonite, and the rest are additives, which are surfactants and defoamers; diatomaceous earth is roasted at 800°C for 5 hours to remove crystal water and organic matter. After dry mixing quartz powder, diatomaceous earth and bentonite for 0.5h, add water, then wet mix silica sol, white clay, sodium hydroxymethyl cellulose and additives, put the mixed water-based casting paint into a ball mill and mix After grinding for 4 hours, the material can be discharged.

Embodiment 2

[0025] A kind of water-based casting paint, take 320 mesh quartz powder, take 12% diatomite to remove crystal water, 10% silica sol, 1% white mud, 0.2% methylol in proportion to the weight of quartz powder Sodium cellulose, 6% bentonite, and the rest are additives, which are surfactants and defoamers; diatomaceous earth is roasted at 850°C for 5 hours to remove crystal water and organic matter. After dry mixing quartz powder, diatomaceous earth and bentonite for 0.5h, add water, then wet mix silica sol, white clay, sodium hydroxymethyl cellulose and additives, put the mixed water-based casting paint into a ball mill and mix After grinding for 4 hours, the material can be discharged.

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Abstract

A water-base foundry coating comprises quartz powder, and also comprises the components: diatomite for removing crystal water and accounting for 8%-12% by mass of quartz powder, silica sol accounting for 6%-10% by mass of quartz powder, white mud accounting for 0.6%-1%by mass of quartz powder, carboxymethyl cellulose sodium accounting for 6%-10% by mass of quartz powder, bentonite accounting for 6%-10% by mass of quartz powder, and the balance additive. The water-base foundry coating is good in high temperature resistance and combining performance, has capabilities of storing gas and exhausting gas, and helps to avoid disadvantages of pores, pin holes, depression and the like on castings.

Description

technical field [0001] The invention relates to a casting coating, in particular to a water-based casting coating and a preparation process thereof. Background technique [0002] Casting refers to heating and melting metal and pouring it into sand molds or molds to make it solidify into utensils. In the production process of metal mold cast pipe, coating is a key technology. The quality of coating directly affects the life of mold, the quality of cast pipe and productivity. The function of coating includes the following aspects: reduce the thermal shock suffered by metal mold, improve Its service life; adjust the thermal resistance of the system and control the cooling rate to ensure that the structure and performance of the casting meet the requirements and form a suitable casting surface. Excessive gas generation of the existing coatings for cast iron pipe parts can easily cause defects such as pores and pinholes in the cast pipes; and the low viscosity of the coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 浦巧生
Owner WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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