CN102397983B - Full mold casing coating - Google Patents

Full mold casing coating Download PDF

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Publication number
CN102397983B
CN102397983B CN 201110392541 CN201110392541A CN102397983B CN 102397983 B CN102397983 B CN 102397983B CN 201110392541 CN201110392541 CN 201110392541 CN 201110392541 A CN201110392541 A CN 201110392541A CN 102397983 B CN102397983 B CN 102397983B
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parts
sodium
coating
full
mold casting
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CN102397983A (en
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戴初发
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Guangdong Huabo Enterprise Management Consulting Co ltd
NANTONG TONGZHOU DISTR JUNLANG BUILDING ENGINEERING Co.,Ltd.
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NINGBO XINGKE AUTOMOBILE NEW MATERIAL TECHNOLOGY Co Ltd
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Abstract

The invention discloses a full mold casting coating, which consists of the lower components in part by weight: 70-80 parts of quartz powder, 10-15 parts of olivine powder, 10-15 parts of alundum powder, 4-6 parts of sodium bentonite, 1-2 parts of lignosulfonic acid, 2-3 parts of dextrin powder, 0.8-1.5 parts of sodium carboxymethylcellulose, 0.4-0.6 part of sodium benzoate, 1-2 parts of hollow glass microsphere, 7-9 parts of aluminum sulfate, 4-6 parts of polyvinyl alcohol, 5-6 parts of silica sol, 0.5-0.8 part of brown iron oxide, 0.04-0.06 part of n-octyl alcohol and 15-25 parts of water.

Description

A kind of full-mold casting coating
Technical field
The present invention relates to casting field, particularly the cavityless casting field.
Background technology
The disperse system that full-mold casting coating is comprised of the material of multiple different in kind, its composition mainly comprises the compositions such as refractory material, binding agent, carrier, suspending agent and special additive, needs coating that good processing performance, service behaviour, quality stability are arranged and applies reappearance.Full-mold casting coating is coated in the outer surface of foamed polystyrene pattern, could the moulding cast after the coating drying.Foamed plastics is airtight, and heat distortion temperature low (about about 70 ℃) is poor to the affinity of water; Liquid residue after foamed plastics melted by heating, the gasification is many, and gas forming amount is large, if these gases and liquid residue can not in time be discharged, foundry goods will produce the carbon defects such as gas, carburetting, Surface Wrinkle in iron.These characteristics have determined that full-mold paint should possess following performance requirement, and namely coating should have good wetability and being coated with property, good high-temperature resistant property and elevated temperature strength and good hot permeability.
About full-mold casting coating, more existing patent literatures, in the prior art, the patent No. is that 03134231.0 Chinese patent discloses a kind of negative pressure cavityless casting coating, its key material is 320 order zirconium English powder or 320 order silica flours or 320 order graphite; Binding agent is sodium phosphate or waterglass or polyvinyl formal and combination thereof; Solvent is water or ethanol; Wetting agent is acetone; Blowing agent is sodium alkyl sulfonate; The coating quality proportioning is: key material 70~80%, and binding agent 4~8%, wetting agent 0.8~1.2%, blowing agent: 1.4~2.0%, all the other are solvent.It is good that this coating has with the foamed plastics wettability, strong adhesion, the characteristics such as elevated temperature strength height and good permeability.The patent No. is that 02100867.1 Chinese patent discloses a kind of water-base paint specially for disappearing cast mold, it is by 700~850 parts of high silica flours, 150~300 parts of diatomite, 20~30 parts of boron-moisten soils, 0.5~2.0 parts of industrial sodium carbonates, 5~15 parts of sodium cellulosates, 30~40 parts of white glue with vinyl, 10~20 parts of aluminum sulfate, 20~30 parts of iron oxide, 20~30 parts of starch, 0.1~0.2 part of washing powder and 700~800 parts of water form, and it is good that this coating has wellability, brushability is good, it is good to become characteristic and trickling property, and coating is even, good permeability, intensity is high, fire resistance is good, and wearability is good, advantage and effect that shelling property is good.But, these two patented technology applicable craft scopes are vacuum full mold castings, the resistance to elevated temperatures of its coating is relatively poor, can only be fit to short finding (in the 200kg) of high-temperature process time and produce, then can not adapt to for the production of heavy castings (in 20 tons) and small lot handwork.The patent No. is the disclosed a kind of full-mold casting coating of the Chinese patent of 200510071854.X, this coating by aqueous solvent and solid content according to water: solid content is that 0.8~1: 1 mass ratio mixes; Wherein solid content be amorphous graphite, crystalline flake graphite, clay, polyvinyl acetate fat liquor according to 25: 5: 4.5: 6 mass ratio forms.This coating has the production technology that resistant to elevated temperatures performance can be applicable to heavy castings, but its manufacturing cost is higher, and can not be applicable to manual brushing, and this coating is black, easily causes the image of working environment black pollution.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to provide a kind of all have strong wearability, high tack, good gas permeability and drip-dry full-mold casting coating under high temperature, low temperature environment, can satisfy the heavy castings production requirement.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of full-mold casting coating, this coating is comprised of following component in weight portion: silica flour 70-80 part, olive stone flour 10-15 part, schmigel 10-15 part, sodium bentonite 4-6 part, lignin sulfonic acid 1-2 part, dextrine powder 2-3 part, sodium carboxymethylcellulose 0.8-1.5 part, Sodium Benzoate 0.4-0.6 part, hollow glass micropearl 1-2 part, aluminum sulfate 7-9 part, polyvinyl alcohol 4-6 part, Ludox 5-6 part, brown iron oxide 0.5-0.8 part, n-octyl alcohol 0.04-0.06 part, water 15-25 part.
Wherein, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Sodium bentonite wherein is for adopting calcium-base bentonite modification of sodium carbonate to prepare.
The present invention has following beneficial effect:
1) on the basis of great many of experiments, determined composition and separately the content of aggregate, suspending agent, bonding agent and the auxiliary material of coating, so that the effect between the above-mentioned each component reaches collaborative, the combination property of coating is improved.Full-mold casting coating of the present invention had both reached high anti-stick sand ability, rigidity and the resistance to elevated temperatures of raising apperance, minimized cost again.Optimization allotment through aggregate and various additives forms high current sex change fluid, all reaches better state with foamed polystyrene pattern wetability and brushability.Facts have proved that this coating just can reach the above paint thickness of 1.7mm through 2 times brushings, the anti-stick sand that can satisfy heavy castings requires and carries needs.
2) full-mold casting coating of the present invention has good suspension and thixotropy, also has good gas permeability and higher surface strength, and preparation technology is simple, easy to operate, abundant raw materials, production cost are low.Full mold cast(ing) surface with its production is bright and clean, without carbon defects such as elephant skin; Coating is easy to peel off, and is convenient to cleaning.
Coating of the present invention is suitable for the cavityless casting of large-sized iron casting.
The specific embodiment
Embodiment one
A kind of full-mold casting coating, this coating is comprised of following component in weight portion: 70 parts of silica flours, 15 parts of olive stone flours, 10 parts of schmigels, 6 parts of sodium bentonites, 1 part of lignin sulfonic acid, 3 parts of dextrine powders, 0.8 part of sodium carboxymethylcellulose, 0.6 part of Sodium Benzoate, 1 part of hollow glass micropearl, 9 parts in aluminum sulfate, 4 parts of polyvinyl alcohol, 6 parts of Ludox, 0.5 part of brown iron oxide, 0.06 part of n-octyl alcohol, 15 parts in water, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Embodiment two
A kind of full-mold casting coating, this coating is comprised of following component in weight portion: 80 parts of silica flours, 10 parts of olive stone flours, 15 parts of schmigels, 4 parts of sodium bentonites, 2 parts of lignin sulfonic acids, 2 parts of dextrine powders, 1.5 parts of sodium carboxymethylcelluloses, 0.4 part of Sodium Benzoate, 2 parts of hollow glass micropearls, 7 parts in aluminum sulfate, 6 parts of polyvinyl alcohol, 5 parts of Ludox, 0.8 part of brown iron oxide, 0.04 part of n-octyl alcohol, 25 parts in water, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Embodiment three
A kind of full-mold casting coating, this coating is comprised of following component in weight portion: 75 parts of silica flours, 13 parts of olive stone flours, 13 parts of schmigels, 5 parts of sodium bentonites, 1.5 parts of lignin sulfonic acids, 2.5 parts of dextrine powders, 1.2 parts of sodium carboxymethylcelluloses, 0.5 part of Sodium Benzoate, 1.5 parts of hollow glass micropearls, 8 parts in aluminum sulfate, 5 parts of polyvinyl alcohol, 5.5 parts of Ludox, 0.6 part of brown iron oxide, 0.05 part of n-octyl alcohol, 20 parts in water, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that namely the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of each raw material of product of the present invention and auxiliary element, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.

Claims (4)

1. a full-mold casting coating is characterized in that, this coating is comprised of following component in weight portion: silica flour 70-80 part, olive stone flour 10-15 part, schmigel 10-15 part, sodium bentonite 4-6 part, lignin sulfonic acid 1-2 part, dextrine powder 2-3 part, sodium carboxymethylcellulose 0.8-1.5 part, Sodium Benzoate 0.4-0.6 part, hollow glass micropearl 1-2 part, aluminum sulfate 7-9 part, polyvinyl alcohol 4-6 part, Ludox 5-6 part, brown iron oxide 0.5-0.8 part, n-octyl alcohol 0.04-0.06 part, water 15-25 part.
2. a kind of full-mold casting coating as claimed in claim 1 is characterized in that, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
3. a kind of full-mold casting coating as claimed in claim 2 is characterized in that, sodium bentonite wherein is for adopting calcium-base bentonite modification of sodium carbonate to prepare.
4. a kind of full-mold casting coating as claimed in claim 2 or claim 3 is characterized in that this coating is comprised of following component in weight portion: 75 parts of silica flours, 13 parts of olive stone flours, 13 parts of schmigels, 5 parts of sodium bentonites, 1.5 parts of lignin sulfonic acids, 2.5 parts of dextrine powders, 1.2 parts of sodium carboxymethylcelluloses, 0.5 part of Sodium Benzoate, 1.5 parts of hollow glass micropearls, 8 parts in aluminum sulfate, 5 parts of polyvinyl alcohol, 5.5 parts of Ludox, 0.6 part of brown iron oxide, 0.05 part of n-octyl alcohol, 20 parts in water.
CN 201110392541 2011-11-29 2011-11-29 Full mold casing coating Active CN102397983B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103100652A (en) * 2012-12-11 2013-05-15 芜湖恒坤汽车部件有限公司 Method for preparing solid-mold casting coating material for cast aluminum

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CN102773405B (en) * 2012-07-26 2015-10-28 宁夏共享集团有限责任公司 A kind of production technology of casting sand mold water based paint
CN102836973B (en) * 2012-07-30 2015-04-15 霍山县东胜铸造材料有限公司 Preparation method for heating heat-insulating riser sleeve
CN102836950B (en) * 2012-08-31 2014-06-25 太仓科博尔精密铸业有限公司 Lost foam coating and preparation method thereof
CN102896274B (en) * 2012-10-30 2015-03-25 宜昌科博耐火材料有限公司 Preparation method of water-based paint cast by high-chromium cast iron lost foam
CN103100657B (en) * 2012-12-11 2016-05-18 芜湖恒坤汽车部件有限公司 A kind of preparation method of strong wearability full-mold casting coating
CN103100649B (en) * 2012-12-11 2016-05-18 芜湖恒坤汽车部件有限公司 A kind of preparation method of high tack full-mold casting coating
CN103100653B (en) * 2012-12-11 2016-03-23 芜湖恒坤汽车部件有限公司 A kind of preparation method of highly-breathable full-mold casting coating
CN103100656B (en) * 2012-12-11 2016-05-18 芜湖恒坤汽车部件有限公司 A kind of preparation method of quick-drying full-mold casting coating
CN103100651B (en) * 2012-12-11 2016-12-21 光泽县和新设备技术有限公司 A kind of preparation method of heavy castings full-mold casting coating
CN103100650B (en) * 2012-12-11 2016-01-06 芜湖恒坤汽车部件有限公司 A kind of preparation method of anti-stick grittiness full-mold casting coating
CN103100658B (en) * 2012-12-11 2016-05-18 芜湖恒坤汽车部件有限公司 The preparation method of full-mold casting coating for a kind of cast iron
CN103056290B (en) * 2013-01-25 2014-11-26 南京信息工程大学 Heat-resisting cast iron casting coating and preparation method thereof
CN103551496B (en) * 2013-10-29 2015-09-02 新疆华莎能源股份有限公司 Anhydrous water-base forsterite powder paint
CN106513568A (en) * 2016-10-10 2017-03-22 佛山市高明区明城镇新能源新材料产业技术创新中心 Environment friendly casting coating as well as preparation method and using method thereof
CN106964752A (en) * 2017-05-17 2017-07-21 东风精密铸造安徽有限公司 A kind of resin-coated sand shell mould cast carbon steel formulation for coating material and preparation technology
CN109382485A (en) * 2018-11-19 2019-02-26 吉林省众慧广博科技有限公司 A kind of casting technique improving automobile-used disk like members casting accuracy
CN109332579B (en) * 2018-11-28 2019-11-12 南京宁阪特殊合金有限公司 It is a kind of to uphang buoyancy coating and preparation method thereof for resin bonded sand mould casting

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN103100652A (en) * 2012-12-11 2013-05-15 芜湖恒坤汽车部件有限公司 Method for preparing solid-mold casting coating material for cast aluminum
CN103100652B (en) * 2012-12-11 2016-06-08 芜湖恒坤汽车部件有限公司 A kind of preparation method of cast aluminium full-mold casting coating

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