CN105618669A - Refractory coating for sand casting of pump body - Google Patents
Refractory coating for sand casting of pump body Download PDFInfo
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- CN105618669A CN105618669A CN201610074714.6A CN201610074714A CN105618669A CN 105618669 A CN105618669 A CN 105618669A CN 201610074714 A CN201610074714 A CN 201610074714A CN 105618669 A CN105618669 A CN 105618669A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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Abstract
The invention discloses refractory coating for sand casting of a pump body, and relates to the technical field of pump casting. The refractory coating is prepared from, by weight, 70-80 parts of phenolic resin, 20-25 parts of fluorocarbon resin, 15-20 parts of mineral powder, 12-17 parts of butadiene styrene rubber, 10-15 parts of asbestos powder, 10-15 parts of rosin, 8-12 parts of nanometer silica powder, 6-10 parts of soap, 6-10 parts of engine oil, 3-6 parts of antimonous oxide, 2-4 parts of ferroboron powder, 2-4 parts of dioctyl phthalate, 2-3 parts of rare earth alloy powder and 400-500 parts of water. After a sand mold and a sand core are coated with the refractory coating, protection films which are high in compactness, refractoriness and thermochemical stability are rapidly formed on the surface of the sand mold and the surface of the sand core, sand is prevented from adhering to the surface of the cast pump body, and the surface roughness of the pump body is greatly lowered; the surface strength of the sand mold and the sand core is improved, the anti-erosion property of the sand mold and the sand core is improved, and thermal radiation of molten metal on the sand mold and the sand core is reduced.
Description
Technical field:
The present invention relates to pump casting technology field, be specifically related to a kind of pump housing sand casting fireproof coating.
Background technology:
Sand casting is a kind of casting method producing foundry goods, and steel, ferrum and most of non-ferrous alloy casting all can obtain with sand mould casting method. Modeling Material used by sand casting is cheap and easy to get, and Casting mold manufacturing is easy, to the single-piece production of foundry goods, produces by batch and produces in a large number and all adapt to, for a long time, is always up the basic technology in Foundry Production. In sand casting, in order to improve the surface quality of foundry goods, generally it is coated with fireproof coating at mould surface, to improve the performances such as its Thermal Resistant Surface, chemical stability, anti-metal liquid erosion and anti-stick grittiness. Although currently used pump sand casting fireproof coating can meet these performances substantially, but the pump housing surface quality made is coarse, it is necessary to just can assemble after repeatedly grinding process, add the amount of labour, be not suitable for industrialization large-scale production.
Summary of the invention:
The technical problem to be solved is in that to provide a kind of pump housing sand casting fireproof coating that can improve sand mold, the Thermal Resistant Surface of core, chemical stability, anti-metal liquid erosion and anti-stick grittiness.
The technical problem to be solved adopts following technical scheme to realize:
A kind of pump housing sand casting fireproof coating, is made up of the raw material of following parts by weight:
Phenolic resin 70-80 part, fluorocarbon resin 20-25 part, mineral powder 15-20 part, butadiene-styrene rubber 12-17 part, flake asbestos 10-15 part, Colophonium 10-15 part, nano silicon micronization 8-12 part, soap 6-10 part, machine oil 6-10 part, antimony oxide 3-6 part, ferro-boron powder 2-4 part, dioctyl phthalate 2-4 part, rare earth alloy powder 2-3 part, water 400-500 part;
Its preparation method is as follows:
(1) in water, add phenolic resin, fluorocarbon resin and butadiene-styrene rubber, after mix homogeneously under microwave frequency 2450MHz, power 600W microwave treatment 10min, add soap and dioctyl phthalate, continue microwave treatment 5min, obtain material I;
(2) in Colophonium, add nano silicon micronization and machine oil, heat to 50-60 DEG C of insulation mixing 15min, add antimony oxide, ferro-boron powder and rare earth alloy powder, continue insulation mixing 10min, obtain material II;
(3) in material I, add material II, mineral powder and flake asbestos, add in ball mill after mix homogeneously, be milled to fineness less than 30 ��m.
Described mineral powder is made up of the raw material of following parts by weight: colliery powder 20-25 part, kieselguhr 10-15 part, zeolite powder 8-13 part, Gypsum Fibrosum powder 6-11 part, stearic acid 5-9 part, paraffin oil 5-9 part, nanometer rubber powder 4-7 part, sodium chloride 3-5 part, polyacrylamide 2-4 part, vermiculite power 2-4 part, zinc oxide 1-2 part, Realgar 1-2 part, its preparation method is: first add in 5 times of w ethanol by colliery powder and kieselguhr, stearic acid and nanometer rubber powder is added after soaking 1h, then at microwave frequency 2450MHz, microwave treatment 15min under power 600W, sodium chloride and polyacrylamide is added after naturally cooling to room temperature, mix homogeneously is placed on 0-5 DEG C and stands 30min, filter, filtering residue is ground into powder after vacuum drying, it is subsequently adding zeolite powder, Gypsum Fibrosum powder, paraffin oil, vermiculite power, zinc oxide and Realgar, it is sufficiently mixed uniformly.
Described vermiculite power needs through pretreatment before using, its processing method is: add in 200-250 part isopropanol by 100-120 part vermiculite power and 25-35 part maleic anhydride, mixture is prior to supersound process 30min under supersonic frequency 40kHz, power 50W, it is again heated to reflux state insulation 15min, 7-11 part sodium carboxymethyl cellulose and 3-6 part soda powder is added after being cooled to room temperature, standing 1h after mix homogeneously, be then fed into vacuum drier, powder made by the size-reduced machine of gained solid.
Described rare earth alloy powder is elementary composition by following percentage by weight: Fe55-60%, Al25-30%, Cr6-8%, Ni2-4%, Mo1-2%, La2-3%, Ce0.5-1%.
The invention has the beneficial effects as follows:
(1), after this fireproof coating is applied to sand mold, core, can quickly form the protecting film that one layer of compactness, fire resistance and thermo-chemical stability are high on its surface, it is prevented that the surface scab of the foundry goods pump housing, be substantially reduced pump housing surface roughness;
(2) this coating can significantly improve the surface strength of sand mold, core, improve its erosion resistibility, reduce the molten metal heat radiation to sand mold, core, thus preventing or reduce the defects such as the pump housing sand holes owing to sand washing or thermal expansion cause and burning into sand, and can prevent or slow down the harmful effect to pump housing surface of the thermal decomposition product of some resin sand;
(3) addition of coating middle rare earth alloyed powder and ferro-boron powder can make pump housing surface texture refine, thus improving serviceability and the service life of the pump housing;
(4) reduce pump housing knockout and the cleaning amount of labour, save the time.
Detailed description of the invention:
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with specific embodiment, the present invention is expanded on further.
Embodiment 1
(1) in 400 parts of water, 70 parts of phenolic resin, 20 parts of fluorocarbon resins and 15 parts of butadiene-styrene rubber are added, after mix homogeneously under microwave frequency 2450MHz, power 600W microwave treatment 10min, add 6 parts of soap and 2 parts of dioctyl phthalates, continue microwave treatment 5min, obtain material I;
(2) in 15 parts of Colophonium, add 8 parts of nano silicon micronizations and 6 parts of machine oil, heat to 50-60 DEG C of insulation mixing 15min, add 3 parts of antimony oxides, 3 parts of ferro-boron powder and 2 parts of rare earth alloy powders, continue insulation mixing 10min, obtain material II;
(3) in material I, add material II, 15 parts of mineral powders and 10 parts of flake asbestos, add in ball mill after mix homogeneously, be milled to fineness less than 30 ��m.
The preparation of mineral powder: first 20 parts of colliery powders and 10 parts of kieselguhr are added in 5 times of w ethanol, 6 parts of stearic acid and 5 parts of nanometers of rubber powders are added after soaking 1h, microwave treatment 15min under microwave frequency 2450MHz, power 600W, 3 parts of sodium chloride and 3 parts of polyacrylamides are added after naturally cooling to room temperature, mix homogeneously is placed on 0-5 DEG C and stands 30min, filter, filtering residue is ground into powder after vacuum drying, it is subsequently adding 8 parts of zeolite powders, 6 parts of Gypsum Fibrosum powders, 8 parts of paraffin oil, 3 parts of vermiculite powers, 2 parts of zinc oxide and 1 portion of Realgar, is sufficiently mixed uniformly.
The pretreatment of vermiculite power: 100 parts of vermiculite powers and 25 parts of maleic anhydrides are added in 200 parts of isopropanols, mixture is prior to supersound process 30min under supersonic frequency 40kHz, power 50W, it is again heated to reflux state insulation 15min, 8 parts of sodium carboxymethyl cellulose and 4 parts of soda powders are added after being cooled to room temperature, 1h is stood after mix homogeneously, being then fed into vacuum drier, powder made by the size-reduced machine of gained solid.
Rare earth alloy powder is elementary composition by following percentage by weight: Fe55%, Al30%, Cr8%, Ni3%, Mo1%, La2%, Ce1%.
Embodiment 2
(1) in 500 parts of water, 80 parts of phenolic resin, 25 parts of fluorocarbon resins and 12 parts of butadiene-styrene rubber are added, after mix homogeneously under microwave frequency 2450MHz, power 600W microwave treatment 10min, add 8 parts of soap and 3 parts of dioctyl phthalates, continue microwave treatment 5min, obtain material I
(2) in 12 parts of Colophonium, add 10 parts of nano silicon micronizations and 8 parts of machine oil, heat to 50-60 DEG C of insulation mixing 15min, add 5 parts of antimony oxides, 2 parts of ferro-boron powder and 3 parts of rare earth alloy powders, continue insulation mixing 10min, obtain material II;
(3) in material I, add material II, 20 parts of mineral powders and 12 parts of flake asbestos, add in ball mill after mix homogeneously, be milled to fineness less than 30 ��m.
The preparation of mineral powder: first 25 parts of colliery powders and 15 parts of kieselguhr are added in 5 times of w ethanol, 9 parts of stearic acid and 4 parts of nanometers of rubber powders are added after soaking 1h, microwave treatment 15min under microwave frequency 2450MHz, power 600W, 5 parts of sodium chloride and 2 parts of polyacrylamides are added after naturally cooling to room temperature, mix homogeneously is placed on 0-5 DEG C and stands 30min, filter, filtering residue is ground into powder after vacuum drying, it is subsequently adding 10 parts of zeolite powders, 8 parts of Gypsum Fibrosum powders, 5 parts of paraffin oil, 4 parts of vermiculite powers, 1 part of zinc oxide and 2 portions of Realgars, is sufficiently mixed uniformly.
The pretreatment of vermiculite power: 110 parts of vermiculite powers and 30 parts of maleic anhydrides are added in 250 parts of isopropanols, mixture is prior to supersound process 30min under supersonic frequency 40kHz, power 50W, it is again heated to reflux state insulation 15min, 10 parts of sodium carboxymethyl cellulose and 6 parts of soda powders are added after being cooled to room temperature, 1h is stood after mix homogeneously, being then fed into vacuum drier, powder made by the size-reduced machine of gained solid.
Rare earth alloy powder is elementary composition by following percentage by weight: Fe55%, Al30%, Cr8%, Ni3%, Mo1%, La2%, Ce1%.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described. Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention. Claimed scope is defined by appending claims and equivalent thereof.
Claims (4)
1. a pump housing sand casting fireproof coating, it is characterised in that be made up of the raw material of following parts by weight:
Phenolic resin 70-80 part, fluorocarbon resin 20-25 part, mineral powder 15-20 part, butadiene-styrene rubber 12-17 part, flake asbestos 10-15 part, Colophonium 10-15 part, nano silicon micronization 8-12 part, soap 6-10 part, machine oil 6-10 part, antimony oxide 3-6 part, ferro-boron powder 2-4 part, dioctyl phthalate 2-4 part, rare earth alloy powder 2-3 part, water 400-500 part;
Its preparation method is as follows:
(1) in water, add phenolic resin, fluorocarbon resin and butadiene-styrene rubber, after mix homogeneously under microwave frequency 2450MHz, power 600W microwave treatment 10min, add soap and dioctyl phthalate, continue microwave treatment 5min, obtain material I;
(2) in Colophonium, add nano silicon micronization and machine oil, heat to 50-60 DEG C of insulation mixing 15min, add antimony oxide, ferro-boron powder and rare earth alloy powder, continue insulation mixing 10min, obtain material II;
(3) in material I, add material II, mineral powder and flake asbestos, add in ball mill after mix homogeneously, be milled to fineness less than 30 ��m.
2. pump housing sand casting fireproof coating according to claim 1, it is characterized in that, described rare earth alloy powder is elementary composition by following percentage by weight: Fe55-60%, Al25-30%, Cr6-8%, Ni2-4%, Mo1-2%, La2-3%, Ce0.5-1%.
3. pump housing sand casting fireproof coating according to claim 1, it is characterized in that, described mineral powder is made up of the raw material of following parts by weight: colliery powder 20-25 part, kieselguhr 10-15 part, zeolite powder 8-13 part, Gypsum Fibrosum powder 6-11 part, stearic acid 5-9 part, paraffin oil 5-9 part, nanometer rubber powder 4-7 part, sodium chloride 3-5 part, polyacrylamide 2-4 part, vermiculite power 2-4 part, zinc oxide 1-2 part, Realgar 1-2 part, its preparation method is: first add in 5 times of w ethanol by colliery powder and kieselguhr, stearic acid and nanometer rubber powder is added after soaking 1h, then at microwave frequency 2450MHz, microwave treatment 15min under power 600W, sodium chloride and polyacrylamide is added after naturally cooling to room temperature, mix homogeneously is placed on 0-5 DEG C and stands 30min, filter, filtering residue is ground into powder after vacuum drying, it is subsequently adding zeolite powder, Gypsum Fibrosum powder, paraffin oil, vermiculite power, zinc oxide and Realgar, it is sufficiently mixed uniformly.
4. pump housing sand casting fireproof coating according to claim 3, it is characterized in that: described vermiculite power needs through pretreatment before using, its processing method is: add in 200-250 part isopropanol by 100-120 part vermiculite power and 25-35 part maleic anhydride, mixture is prior to supersonic frequency 40kHz, supersound process 30min under power 50W, it is again heated to reflux state insulation 15min, 7-11 part sodium carboxymethyl cellulose and 3-6 part soda powder is added after being cooled to room temperature, 1h is stood after mix homogeneously, it is then fed into vacuum drier, powder made by the size-reduced machine of gained solid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610074714.6A CN105618669A (en) | 2016-02-01 | 2016-02-01 | Refractory coating for sand casting of pump body |
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| CN201610074714.6A CN105618669A (en) | 2016-02-01 | 2016-02-01 | Refractory coating for sand casting of pump body |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106634427A (en) * | 2016-12-16 | 2017-05-10 | 池州恒和精密机械有限公司 | Refractory paint for sand casting |
| CN108856638A (en) * | 2018-08-30 | 2018-11-23 | 安徽惠明机械制造有限公司 | A kind of machine casting moulding sand binder |
| CN108907073A (en) * | 2018-07-11 | 2018-11-30 | 马鞍山力搏机械制造有限公司 | A kind of preparation method for die casting cast paint |
| CN109014016A (en) * | 2018-08-30 | 2018-12-18 | 安徽惠明机械制造有限公司 | Sand mixing auxiliary material for sand casting |
| CN109093060A (en) * | 2018-08-30 | 2018-12-28 | 安徽惠明机械制造有限公司 | A kind of high-strength sand and preparation method thereof |
| CN109290514A (en) * | 2018-11-23 | 2019-02-01 | 贵州安吉航空精密铸造有限责任公司 | A kind of low pressure core coating and preparation method thereof |
| CN109321021A (en) * | 2018-10-29 | 2019-02-12 | 石家庄易辰防火保温材料有限公司 | A kind of fire-type expanded vermiculite and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634427A (en) * | 2016-12-16 | 2017-05-10 | 池州恒和精密机械有限公司 | Refractory paint for sand casting |
| CN108907073A (en) * | 2018-07-11 | 2018-11-30 | 马鞍山力搏机械制造有限公司 | A kind of preparation method for die casting cast paint |
| CN108856638A (en) * | 2018-08-30 | 2018-11-23 | 安徽惠明机械制造有限公司 | A kind of machine casting moulding sand binder |
| CN109014016A (en) * | 2018-08-30 | 2018-12-18 | 安徽惠明机械制造有限公司 | Sand mixing auxiliary material for sand casting |
| CN109093060A (en) * | 2018-08-30 | 2018-12-28 | 安徽惠明机械制造有限公司 | A kind of high-strength sand and preparation method thereof |
| CN109321021A (en) * | 2018-10-29 | 2019-02-12 | 石家庄易辰防火保温材料有限公司 | A kind of fire-type expanded vermiculite and preparation method thereof |
| CN109290514A (en) * | 2018-11-23 | 2019-02-01 | 贵州安吉航空精密铸造有限责任公司 | A kind of low pressure core coating and preparation method thereof |
| CN109290514B (en) * | 2018-11-23 | 2020-06-23 | 贵州安吉航空精密铸造有限责任公司 | Low-pressure sand core coating and preparation method thereof |
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Application publication date: 20160601 |