Heat-insulation fireproof coating applied to pre-buried pipe of vacuum cast aluminium alloy casting
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A technology of aluminum alloy castings and refractory coatings, applied in the field of casting, can solve problems such as poor results
Active Publication Date: 2015-04-08
CHUZHOU JINNUO INDAL
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preparation example Construction
[0029] The preparation method of above-mentioned modified clay is:
[0030] 1) The lump clay is fed into the grinding machine, and under the condition that the rotating speed is 180 rev / min, the ball-milling is carried out continuously for 4 hours, and the powder is obtained by passing through a 200-mesh sieve;
[0031] 2) Add powder and water in a weight ratio of 1:1.5 into the stainless steel heating tank, and then close the stainless steel heating tank;
[0032] 3) heating the raw material through a stainless steel heating tank, stirring while heating, and the stirring speed is controlled at 120 rpm, after stirring and heating to 155 ℃-165 ℃, stop heating, and continue to stir for 60-65 minutes;
[0033] 4) The powder after heating and stirring is sucked into the stainless steel freezing bed, closed and frozen for 12 hours, and the freezing temperature is -6 °C;
[0034] 5) On the freezing bed, keep refrigerated for 24 hours under the condition of 0 ℃-2 ℃, make its crystal...
Embodiment 2
[0038] A heat-insulating and refractory coating for pre-embedded pipes of vacuum casting aluminum alloy castings is prepared from the following components in parts by weight: 30 parts of sepiolite powder, 4 parts of cationic starch, 6 parts of expanded graphite, 1.5 parts of chloroplatinic acid, industrial alkali 3 parts, 4 parts modified clay, 6 parts alumina, 4 parts silicon carbide, 6 parts sodium carboxymethyl cellulose, 30 parts deionized water, 3 parts mullite, 1 part shell, 6 parts sea mud, titanium 1 part potassium acid whisker, 3 parts silicon nitride, 1 part boron nitride, 3 parts iron carbonate, 1 part titanium dioxide whisker, 3 parts magnesium carbonate, 1 part zinc oxide, 6 parts calcined kaolin, 1 part alum, blue 6 parts of spar powder.
[0039] Its preparation method is as follows:
[0040] 1) Mix and stir the above-mentioned components evenly, and put them into a ball mill;
[0041] 2) Grind in a ball mill for about 4 hours, and test whether there are residu...
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Abstract
The invention discloses a heat-insulation fireproof coating applied to a pre-buried pipe of a vacuum cast aluminium alloy casting. The heat-insulation fireproof coating is prepared from the following components in parts by weight: 20-30 parts of sepiolite powder, 4-6 parts of cationic starch, 4-6 parts of expanded graphite, 1.5-3 parts of chloroplatinic acid, 1-3 parts of industrial alkali, 4-6 parts of modified clay, 4-6 parts of aluminium oxide, 4-6 parts of silicon carbide, 4-6 parts of sodium carboxymethylcellulose, 30-50 parts of deionized water, 1-3 parts of mullite, 1-3 parts of shell, 4-6 parts of sea mud, 1-3 parts of potassium titanate whiskers, 1-3 parts of silicon nitride, 1-3 parts of boron nitride, 1-3 parts of iron carbonate, 1-3 parts of titanium dioxide whiskers, 1-3 parts of magnesium carbonate, 1-3 parts of zinc oxide, 4-6 parts of calcined kaolin, 1-3 parts of white alum and 4-6 parts of kyanite powder. By improving the preparation of the conventional fireproof mud, a pre-buried copper pipe or stainless steel pipe is coated with a layer of fireproof coating with specific thickness; and the effects of insulating heat, preventing softening and preventing a liquid aluminum accommodation copper pipe from entering a pipeline can be implemented.
Description
technical field [0001] The invention relates to the technical field of casting, in particular to a heat-insulating refractory coating for pre-embedded pipes of vacuum casting aluminum alloy castings. Background technique [0002] The home appliance liner mold is a kind of vacuum forming mold. The refrigerator manufacturer heats the mold, and then softens the ABS plastic and forms it. The heating of the mold is realized by the water pipe embedded in the inner side of the aluminum alloy casting, and the hot water is circulated into the water pipe, and the temperature control of the overall mold is realized by controlling the water flow and temperature. [0003] At present, the home appliance liner mold is generally cast by the sand molding process, and the pre-embedding of the water pipe is made by pre-fabricating the pipe groove on the sand mold, and then the shape of the pipe groove is made, and the copper pipe or stainless steel bent in advance according to the size of the ...
Claims
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