CN104475648A - Resin molding sand with characteristics of high heat-resistance and gas permeability, and preparation method thereof - Google Patents
Resin molding sand with characteristics of high heat-resistance and gas permeability, and preparation method thereof Download PDFInfo
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- CN104475648A CN104475648A CN201410607532.1A CN201410607532A CN104475648A CN 104475648 A CN104475648 A CN 104475648A CN 201410607532 A CN201410607532 A CN 201410607532A CN 104475648 A CN104475648 A CN 104475648A
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- parts
- molding sand
- clay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
Abstract
The invention relates to resin molding sand with characteristics of high heat-resistance and gas permeability, wherein the resin molding sand is prepared from the following raw materials by weight: 2-4 parts of desulfurized gypsum, 5-7 parts of turpentine oil, 3-5 parts of carbon fibers, 8-13 parts of precipitated silica, 2-3 parts of hydrogenated rosin, 1-1.4 parts of cobalt oxide, 20-25 parts of calcined aluminum hydroxide, 1-1.5 parts of Na2O, 40-50 parts of pit mud, 70-80 parts of knar clay, 3-4 parts of a furan resin, 100-120 parts of clay, a proper amount of water, and 20-30 parts of an auxiliary agent. According to the resin molding sand of the present invention, the clay and the knar clay are adopted so as to provide advantages of suitable particle size, good gas permeability, good fluidity and good dispersion, the carbon fibers, the precipitated silica and the calcined aluminum hydroxide are added so as to increase the strength and the heat resistance of the molding sand particles, the cast surface is smooth, the shakeout is not easily generated, and the recycling can be achieved.
Description
Technical field
The present invention relates to casting field, particularly relate to a kind of high heat-resisting permeable resin molding sand and preparation method thereof.
Background technology
The subject matter that current molding sand exists has: 1, particle size difficulty controls, if molding sand particle diameter is too large, although gas permeability is better, cast(ing) surface is more coarse, and fineness is bad; If molding sand material footpath is too little, cause mo ld void bad, foundry goods has pore to produce.2, dispel the heat bad, chill effect is poor, and shrinkage porosite, shrinkage cavity phenomenon easily appear in intricate casting inside.3, dispersed, mobility is bad, easily caking, dusting beans.4, knockout is serious, and scrappage is high.5, special molding sand is lacked for different types of foundry goods.
Conventional clay molding sand has many good qualities, but exists not easy to be recycled, and poor air permeability, mobility are bad, dispersiveness is bad, collapsibility is poor, it is bad to dispel the heat, environmental pollution is serious shortcoming.
Therefore, the above shortcoming that molding sand exists needs to overcome.
Summary of the invention
The object of the present invention is to provide a kind of high heat-resisting permeable resin molding sand and preparation method thereof, this sand permeability is good, good fluidity, good dispersion, and intensity is high, good heat resistance, and cast(ing) surface is smooth, not easily knockout, can also recycling.
Technical scheme of the present invention is as follows:
A kind of high heat-resisting permeable resin molding sand, is characterized in that being made up of the raw material of following weight portion: desulfurated plaster 2-4, turpentine oil 5-7, carbon fiber 3-5, precipitated silica 8-13, Foral 2-3, cobalt oxide 1-1.4, calcinations of aluminum hydroxide 20-25, Na2O 1-1.5, first mud 40-50, kieselguhr 70-80, furane resins 3-4, clay 100-120, water are appropriate, auxiliary agent 20-30;
Described auxiliary agent is made up of the raw material of following weight portion: potassic feldspar 2-3, photovoltaic silicon cutting solid waste 20-23, carbon black 1-2, residual oil liquid 0.5-1, phenolic resins 1-1.4, sodium carbonate 0.8-1.2, bentonite 2-2.5, cationic starch 1-1.4, water are appropriate; Preparation method is: by potassic feldspar, photovoltaic silicon cutting solid waste, carbon black mixing, carry out ball milling, cross 150 mesh sieves, add the water of 7-9 weight portion, stir, add phenolic resins again, stir, granulation, particle diameter is at 0.5-2mm, then at 1400-1600 DEG C, calcine 20-30 minute, obtain particle; By sodium carbonate, bentonite, cationic starch mixing, add the water of 5-7 weight portion, be heated to 70-80 DEG C, stir 3-4 minute, add described particle, stir, dry, pulverize, particle diameter at 0.5-2.5mm, then mixes with other residual components, stirs, to obtain final product.
The preparation method of the heat-resisting permeable resin molding sand of described height, is characterized in that comprising the following steps:
(1) by clay, desulfurated plaster, precipitated silica, cobalt oxide, calcinations of aluminum hydroxide, first mud, kieselguhr mixing, pulverize, cross 50 mesh sieves, add carbon fiber, Na2O, the water adding 7-9% weight portion stirs, granulation, and particle diameter is at 0.05-2.5mm, send in calcining furnace, pre-burning 20-25 minute at 300-400 DEG C, then sinters at 1330-1370 DEG C, takes out, polishing, to surface roughness≤0.1mm, obtains clay particle;
(2) by turpentine oil, Foral mixing, be heated to 50-60 DEG C, stir 10-15 minute, obtain mixed material;
(3) material that described clay particle, (2) step obtain is mixed with other residual components, then the water adding 2-3% weight portion mixes, and to obtain final product.
Beneficial effect of the present invention
Molding sand of the present invention is by using clay, kieselguhr, particle size is suitable, good permeability, good fluidity, good dispersion, by adding carbon fiber, precipitated silica, calcinations of aluminum hydroxide, add intensity and the heat resistance of molding sand particle, cast(ing) surface is smooth, not easily knockout, can also recycling.Auxiliary agent of the present invention make use of photovoltaic silicon cutting solid waste, containing exotic materials such as carborundum, adds the heat resistance of molding sand, prevent clay particle from boning, decrease environmental pollution, be conducive to molding sand and recycle, there is bentonite on surface, and caking property is good, and plasticity is good.
Detailed description of the invention
A kind of high heat-resisting permeable resin molding sand, is made up of the raw material of following weight portion (kilogram): desulfurated plaster 3, turpentine oil 6, carbon fiber 4, precipitated silica 11, Foral 2.5, cobalt oxide 1.2, calcinations of aluminum hydroxide 23, Na2O 1.3, first mud 45, kieselguhr 75, furane resins 3.5, clay 110, water are appropriate, auxiliary agent 25;
Described auxiliary agent is made up of the raw material of following weight portion (kilogram): potassic feldspar 2.5, photovoltaic silicon cutting solid waste 21, carbon black 1.5, residual oil liquid 0.7, phenolic resins 1.2, sodium carbonate 1, bentonite 2.3, cationic starch 1.2, water are appropriate; Preparation method is: by potassic feldspar, photovoltaic silicon cutting solid waste, carbon black mixing, carry out ball milling, cross 150 mesh sieves, add the water of 8 weight portions, stir, then add phenolic resins, stir, granulation, particle diameter, at 0.5-2mm, is then calcined 25 minutes, is obtained particle at 1500 DEG C; By sodium carbonate, bentonite, cationic starch mixing, add the water of 6 weight portions, be heated to 76 DEG C, stir 3 minutes, add described particle, stir, dry, pulverize, particle diameter at 0.5-2.5mm, then mixes with other residual components, stirs, to obtain final product.
The preparation method of the heat-resisting permeable resin molding sand of described height, comprises the following steps:
(1) by clay, desulfurated plaster, precipitated silica, cobalt oxide, calcinations of aluminum hydroxide, first mud, kieselguhr mixing, pulverize, cross 50 mesh sieves, add carbon fiber, Na2O, the water adding 8% weight portion stirs, granulation, and particle diameter is at 0.05-2.5mm, send in calcining furnace, pre-burning 23 minutes at 350 DEG C, then sinters at 1350 DEG C, takes out, polishing, to surface roughness≤0.1mm, obtains clay particle;
(2) by turpentine oil, Foral mixing, be heated to 54 DEG C, stir 14 minutes, obtain mixed material;
(3) material that described clay particle, (2) step obtain is mixed with other residual components, then the water adding 2.4% weight portion mixes, and to obtain final product.
The sand test data that the present embodiment obtains are as follows: green compression strength is 154KPa, gas permeability 122, and hot green tensile strength is 2.4KPa, and normal temperature green tensile strength is 21KPa.
Claims (2)
1. a high heat-resisting permeable resin molding sand, is characterized in that being made up of the raw material of following weight portion: desulfurated plaster 2-4, turpentine oil 5-7, carbon fiber 3-5, precipitated silica 8-13, Foral 2-3, cobalt oxide 1-1.4, calcinations of aluminum hydroxide 20-25, Na2O 1-1.5, first mud 40-50, kieselguhr 70-80, furane resins 3-4, clay 100-120, water are appropriate, auxiliary agent 20-30;
Described auxiliary agent is made up of the raw material of following weight portion: potassic feldspar 2-3, photovoltaic silicon cutting solid waste 20-23, carbon black 1-2, residual oil liquid 0.5-1, phenolic resins 1-1.4, sodium carbonate 0.8-1.2, bentonite 2-2.5, cationic starch 1-1.4, water are appropriate; Preparation method is: by potassic feldspar, photovoltaic silicon cutting solid waste, carbon black mixing, carry out ball milling, cross 150 mesh sieves, add the water of 7-9 weight portion, stir, add phenolic resins again, stir, granulation, particle diameter is at 0.5-2mm, then at 1400-1600 DEG C, calcine 20-30 minute, obtain particle; By sodium carbonate, bentonite, cationic starch mixing, add the water of 5-7 weight portion, be heated to 70-80 DEG C, stir 3-4 minute, add described particle, stir, dry, pulverize, particle diameter at 0.5-2.5mm, then mixes with other residual components, stirs, to obtain final product.
2. the preparation method of high heat-resisting permeable resin molding sand according to claim 1, is characterized in that comprising the following steps:
(1) by clay, desulfurated plaster, precipitated silica, cobalt oxide, calcinations of aluminum hydroxide, first mud, kieselguhr mixing, pulverize, cross 50 mesh sieves, add carbon fiber, Na2O, the water adding 7-9% weight portion stirs, granulation, and particle diameter is at 0.05-2.5mm, send in calcining furnace, pre-burning 20-25 minute at 300-400 DEG C, then sinters at 1330-1370 DEG C, takes out, polishing, to surface roughness≤0.1mm, obtains clay particle;
(2) by turpentine oil, Foral mixing, be heated to 50-60 DEG C, stir 10-15 minute, obtain mixed material;
(3) material that described clay particle, (2) step obtain is mixed with other residual components, then the water adding 2-3% weight portion mixes, and to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410607532.1A CN104475648B (en) | 2014-11-03 | 2014-11-03 | A kind of high heat-resisting permeable resin molding sand and preparation method thereof |
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| CN201410607532.1A CN104475648B (en) | 2014-11-03 | 2014-11-03 | A kind of high heat-resisting permeable resin molding sand and preparation method thereof |
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| CN104475648A true CN104475648A (en) | 2015-04-01 |
| CN104475648B CN104475648B (en) | 2016-08-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841874A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Moulding sand for middle-large size castings and preparation method thereof |
| CN104841861A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Precoated sand appropriate for manufacturing of thin-walled core sand and preparation method of precoated sand |
| CN104889318A (en) * | 2015-06-08 | 2015-09-09 | 含山县东山德雨球墨铸造厂 | Preparation method of steel casting moulding sand |
| CN107138676A (en) * | 2017-04-25 | 2017-09-08 | 安徽索立德铸业有限公司 | A kind of defeated and dispersed auxiliary agent of casting water glass self-hardening sand |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58202943A (en) * | 1982-05-19 | 1983-11-26 | Nissan Motor Co Ltd | Resin coated sand for casting |
| CN103521690A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Easily-collapsible mud core molding sand and preparation method thereof |
| CN103567356A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Sodium silicate sand with high wet-compressive strength and preparation method thereof |
| CN104057011A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand for loam core and preparation method of casting molding sand |
-
2014
- 2014-11-03 CN CN201410607532.1A patent/CN104475648B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58202943A (en) * | 1982-05-19 | 1983-11-26 | Nissan Motor Co Ltd | Resin coated sand for casting |
| CN103567356A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Sodium silicate sand with high wet-compressive strength and preparation method thereof |
| CN103521690A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Easily-collapsible mud core molding sand and preparation method thereof |
| CN104057011A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand for loam core and preparation method of casting molding sand |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841874A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Moulding sand for middle-large size castings and preparation method thereof |
| CN104841861A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Precoated sand appropriate for manufacturing of thin-walled core sand and preparation method of precoated sand |
| CN104889318A (en) * | 2015-06-08 | 2015-09-09 | 含山县东山德雨球墨铸造厂 | Preparation method of steel casting moulding sand |
| CN107138676A (en) * | 2017-04-25 | 2017-09-08 | 安徽索立德铸业有限公司 | A kind of defeated and dispersed auxiliary agent of casting water glass self-hardening sand |
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| Publication number | Publication date |
|---|---|
| CN104475648B (en) | 2016-08-17 |
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Effective date of registration: 20160628 Address after: 241200 Anhui Province, Wuhu City asan cypress Fanchang County Town Village Industrial Park Applicant after: WUHU CHUANGYUAN NEW MATERIALS CO., LTD. Address before: 241200 Anhui city of Wuhu province Fanchang Suncun Town Village plow Applicant before: Fanchang Qixiang Casting Factory |
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Effective date of registration: 20190430 Address after: 301500 Ninghe County, Tianjin (revoked) on the east side of Nanhu Village, Lutai Town Patentee after: TIANJIN BAOXIN CASTING CO., LTD. Address before: 241200 Baishu Village Industrial Park, Eshan Town, Fanchang County, Wuhu City, Anhui Province Patentee before: WUHU CHUANGYUAN NEW MATERIALS CO., LTD. |
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