A kind of preparation method of water-based spray coating for large iron castings

A water-based technology for iron castings, applied in casting molding equipment, coatings, casting molds, etc., can solve the problems of uneven coating, difficult to guarantee coating hangability, high toxicity, etc., and achieve excellent rheological properties, spray coating Good performance and high environmental protection factor

Active Publication Date: 2015-12-09
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are currently few researches and developments on spray coatings in China, especially spray coatings for large iron castings, and there are a series of problems in production operations. The smell is very strong; the anti-sand sticking performance of the coating is poor, it is not easy to sinter, and cannot meet the anti-sand sticking requirements of large castings; due to the high surface tension of the coating, it is difficult to guarantee the coating hangability of the coating, there are many drip marks, and the coating is uneven , affecting the surface quality of castings; the paint spraying performance is poor
[0004] So far there is no way to overcome the above drawbacks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: a kind of preparation method of water-based spray coating of large-scale iron casting, this method comprises the steps:

[0021] Ⅰ. Add 340kg of water to the high-speed dispersing kettle, turn on the electric agitator, and slowly add 3kg of hydroxypropyl methylcellulose at a dispersing speed of 800r / min. After the addition, continue stirring for 20 minutes to completely disperse and dissolve it;

[0022] Ⅱ. Add 2kg of sodium pentachlorophenate, 2kg of silicone defoamer, and 6kg of Tritonx-102 active agent to the dispersing kettle, turn on the electric stirring, and disperse for 10 minutes at a speed of 1200r / min;

[0023] Ⅲ. Keep stirring at a high speed, slowly add attapulgite 32kg into the dispersion kettle, after the addition is complete, disperse at a speed of 1200r / min for 10 minutes;

[0024] Ⅳ. Add 5kg of PVA, 60kg of ethyl silicate, and 70kg of aluminum sulfate to the dispersing kettle in turn, and disperse at a speed of 1200r / min for 10 minutes ...

Embodiment 2

[0027] Embodiment two: a kind of preparation method of water-based spray coating of large-scale iron casting, this method comprises the following steps:

[0028] Ⅰ. Add 320kg of water to the high-speed dispersing kettle, turn on the electric stirring, and slowly add hydroxypropyl methylcellulose at a dispersing speed of 800r / min. After adding the material, continue stirring for 20 minutes to completely disperse and dissolve it;

[0029] Ⅱ. Add 3.5kg of sodium pentachlorophenate, 3kg of silicone defoamer, and 4.5kg of Tritonx-102 active agent to the dispersion kettle, turn on the electric stirring, and disperse for 10 minutes at a speed of 1200r / min;

[0030] Ⅲ. Keep stirring at a high speed, slowly add attapulgite 25kg into the dispersing kettle, after adding, disperse at a speed of 1200r / min for 10 minutes;

[0031] Ⅳ. Add 6kg of PVA, 50kg of ethyl silicate, and 53kg of aluminum sulfate to the dispersing kettle in turn, and disperse at a speed of 1200r / min for 10 minutes afte...

Embodiment 3

[0034] Embodiment three: a kind of preparation method of water-based spray coating of large-scale iron casting, this method comprises the following steps:

[0035] Ⅰ. Add 300kg of water to the high-speed dispersing kettle, turn on the electric agitator, and slowly add 7kg of hydroxypropyl methylcellulose at a dispersing speed of 800r / min. After the addition, continue stirring for 20 minutes to completely disperse and dissolve it;

[0036] Ⅱ. Add 5kg of sodium pentachlorophenate, 4kg of silicone defoamer, and 2kg of Tritonx-102 active agent to the dispersion kettle, turn on the electric stirring, and disperse for 10 minutes at a speed of 1200r / min;

[0037] Ⅲ. Keep stirring at a high speed, slowly add 15kg of attapulgite to the dispersing kettle, and disperse at a speed of 1200r / min for 10 minutes after the addition is complete;

[0038] Ⅳ. Add 7kg of PVA, 30kg of ethyl silicate, and 40kg of aluminum sulfate to the dispersing kettle in turn, and disperse at a speed of 1200r / min...

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PUM

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Abstract

The invention relates to a production method of a fireproof coating for a sand mould casting and particularly relates to a preparation method of a water-base spraying coating for a large-size iron casting, which is used for a large-size thick-wall iron casting and is suitable for a spraying coating process. The method comprises the following steps: adding water into a high-speed dispersion kettle; starting electric agitation; slowly adding hydroxypropyl methyl cellulose; after adding the material, continuing to agitate; adding sodium pentachlorophenate, an organic silicon de-foaming agent and an activating agent into the dispersion kettle; starting the electric agitation and slowly adding attapulgite into the dispersion kettle while keeping high-speed agitation; after adding the material, dispersing; sequentially adding PVA (Polyvinyl Acetate), ethyl silicate and aluminum sulfate into the dispersion kettle; after adding the material, dispersing; sequentially adding bauxite and sillimanite into the dispersion kettle under an agitating state; after adding the material, finishing dispersion; discharging and packaging. The production method provided by the invention is unique in raw materials and process, high in environmental protection coefficient, excellent in coating rheological property and good in spraying performance; the coating is easy to sinter and is particularly suitable for the large-size iron casting.

Description

technical field [0001] The invention relates to a production method of a refractory coating for sand casting, in particular to a method for preparing a large-scale thick-walled iron casting water-based spray coating suitable for a spray coating process. Background technique [0002] Foundry coating is a very important material in the foundry industry, which has a great influence on the appearance quality and internal quality of castings. Casting coatings can be divided into brush coatings, flow coatings, dip coatings and spray coatings according to their application methods, and correspondingly there are brush coatings, flow coatings, dip coatings and spray coatings. Flow coating and dip coating are only suitable for small and medium-sized parts, and the efficiency of brushing is too low. For the production of large parts, it is an inevitable trend to choose spray coating. [0003] However, there are currently few researches and developments on spray coatings in China, espe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
Inventor 陈学更韩文李天才朱劲松
Owner 共享新材料(山东)有限公司
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