CN104550636A - Molding sand for aluminum alloy casting and preparation method of molding sand - Google Patents
Molding sand for aluminum alloy casting and preparation method of molding sand Download PDFInfo
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- CN104550636A CN104550636A CN201410711032.2A CN201410711032A CN104550636A CN 104550636 A CN104550636 A CN 104550636A CN 201410711032 A CN201410711032 A CN 201410711032A CN 104550636 A CN104550636 A CN 104550636A
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- sand
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- clay
- molding sand
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses molding sand for an aluminum alloy casting. The molding sand is prepared from the following raw materials in parts by weight: 40-50 parts of photovoltaic silicon cutting solid wastes, 1-1.4 parts of K2O, 1-1.3 parts of Na2O, 30-38 parts of magnesite powder, 2-3 parts of red sand, 5-6 parts of styrene-butadiene emulsion, 1-1.3 parts of dextrin, 30-40 parts of alkaline earth, 130-160 parts of clay, a proper amount of water and 20-30 parts of aids. The molding sand disclosed by the invention is granular, high in air permeability, high in dispersity and high in heat resistance, the aluminum alloy surface is not adhered, and the amount of oxide inclusion phenomena is small.
Description
Technical field
The present invention relates to casting field, particularly relate to a kind of aluminium alloy castings molding sand and preparation method thereof.
Background technology
There is particle size problem rambunctious in current molding sand, affects yield rate and the Modeling precision of foundry goods.Further, lack special molding sand for different types of foundry goods, make casting accuracy not high, yield rate is low.
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.
Above shortcoming needs to improve.
Summary of the invention
The object of the present invention is to provide a kind of aluminium alloy castings molding sand and preparation method thereof, this sand permeability be good, good dispersion, good heat resistance, non-caked aluminum alloy surface, oxide slag inclusion phenomenon is few.
Technical scheme of the present invention is as follows:
A kind of aluminium alloy castings molding sand, is characterized in that being made up of the raw material of following weight portion: photovoltaic silicon cutting solid waste 40-50, K
2o1-1.4, Na
2o1-1.3, magnesite powder 30-38, red sand 2-3, Carboxy emulsion 5-6, dextrin 1-1.3, alkaline earth 30-40, clay 130-160, water are appropriate, auxiliary agent 20-30;
Described auxiliary agent is made up of the raw material of following weight portion: chromite sand 6-8, ceramic sand 4-5, walnut sand 2-3, aluminium oxide 3-4, silica 4-5, nice foundry sand 5-7, clay 2-3, silane coupler kh-550 0.5-1, magnesia 0.4-0.7; Preparation method is: carry out ball milling by after aluminium oxide, magnesia, silica mixing, cross 200 mesh sieves, 2-2.5 hour is calcined at 1400-1500 DEG C, add Quench in cold water, then be ground into the particle that particle diameter is less than 2mm, add chromite sand, walnut sand, grinding 30-40 minute, add other residual components, grinding 20-30 minute, to obtain final product.
The preparation method of described aluminium alloy castings molding sand, is characterized in that comprising the following steps:
(1) by clay, photovoltaic silicon cutting solid waste, alkaline earth mixing, pulverize, cross 50 mesh sieves, add K
2o, Na
2o mixes, and 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 sinter at 1200-1250 DEG C, take out, polish to surface roughness≤0.1mm, obtain clay particle;
(2) magnesite powder is heated to melt, adds Quench in cold water, be ground into the using magnesite granule of 0.05-1.5mm;
(3) described clay particle, using magnesite granule are mixed with other residual components, then add the water mixing 8-13 minute of 4.1-4.7% weight portion, to obtain final product.
Beneficial effect of the present invention
Molding sand of the present invention is graininess, good permeability, good dispersion, good heat resistance, non-caked aluminum alloy surface, and oxide slag inclusion phenomenon is few.Auxiliary agent of the present invention is high temperature resistant, good dispersion, and lubricity is good, good with the affinity of clay particle, can increase the plasticity of molding sand, gas permeability, mobility, heat resistance, prevent clay particle from boning, and improves the yield rate of foundry goods.
Detailed description of the invention
A kind of aluminium alloy castings molding sand, is made up of the raw material of following weight portion (kilogram): photovoltaic silicon cutting solid waste 45, K
2o1.2, Na
2o1.2, magnesite powder 34, red sand 2.5, Carboxy emulsion 5.5, dextrin 1.2, alkaline earth 35, clay 140, water are appropriate, auxiliary agent 25;
Described auxiliary agent is made up of the raw material of following weight portion (kilogram): chromite sand 7, ceramic sand 4.5, walnut sand 2.5, aluminium oxide 3.5, silica 4.5, nice foundry sand 6, clay 2.5, silane coupler kh-550 0.7, magnesia 0.6; Preparation method is: carry out ball milling by after aluminium oxide, magnesia, silica mixing, cross 200 mesh sieves, calcine 2.3 hours at 1450 DEG C, add Quench in cold water, then be ground into the particle that particle diameter is less than 2mm, add chromite sand, walnut sand, grind 35 minutes, add other residual components, grind 25 minutes, to obtain final product.
The preparation method of described aluminium alloy castings molding sand, comprises the following steps:
(1) by clay, photovoltaic silicon cutting solid waste, alkaline earth mixing, pulverize, cross 50 mesh sieves, add K
2o, Na
2o mixes, and the water adding 8% weight portion stirs, granulation, and particle diameter, at 0.05-2.5mm, is sent in calcining furnace, pre-burning 23 minutes at 350 DEG C, then sintered at 1230 DEG C, take out, polish to surface roughness≤0.1mm, obtain clay particle;
(2) magnesite powder is heated to melt, adds Quench in cold water, be ground into the using magnesite granule of 0.05-1.5mm;
(3) described clay particle, using magnesite granule are mixed with other residual components, then the water adding 4.4% weight portion mixes 11 minutes, to obtain final product.
The sand test data that the present embodiment obtains are as follows: green compression strength is 120KPa, gas permeability 150, and green tensile strength is 2.1KPa.
Claims (2)
1. an aluminium alloy castings molding sand, is characterized in that being made up of the raw material of following weight portion: photovoltaic silicon cutting solid waste 40-50, K
2o1-1.4, Na
2o1-1.3, magnesite powder 30-38, red sand 2-3, Carboxy emulsion 5-6, dextrin 1-1.3, alkaline earth 30-40, clay 130-160, water are appropriate, auxiliary agent 20-30;
Described auxiliary agent is made up of the raw material of following weight portion: chromite sand 6-8, ceramic sand 4-5, walnut sand 2-3, aluminium oxide 3-4, silica 4-5, nice foundry sand 5-7, clay 2-3, silane coupler kh-550 0.5-1, magnesia 0.4-0.7; Preparation method is: carry out ball milling by after aluminium oxide, magnesia, silica mixing, cross 200 mesh sieves, 2-2.5 hour is calcined at 1400-1500 DEG C, add Quench in cold water, then be ground into the particle that particle diameter is less than 2mm, add chromite sand, walnut sand, grinding 30-40 minute, add other residual components, grinding 20-30 minute, to obtain final product.
2. the preparation method of aluminium alloy castings molding sand according to claim 1, is characterized in that comprising the following steps:
(1) by clay, photovoltaic silicon cutting solid waste, alkaline earth mixing, pulverize, cross 50 mesh sieves, add K
2o, Na
2o mixes, and 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 sinter at 1200-1250 DEG C, take out, polish to surface roughness≤0.1mm, obtain clay particle;
(2) magnesite powder is heated to melt, adds Quench in cold water, be ground into the using magnesite granule of 0.05-1.5mm;
(3) described clay particle, using magnesite granule are mixed with other residual components, then add the water mixing 8-13 minute of 4.1-4.7% weight portion, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711032.2A CN104550636A (en) | 2014-12-01 | 2014-12-01 | Molding sand for aluminum alloy casting and preparation method of molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711032.2A CN104550636A (en) | 2014-12-01 | 2014-12-01 | Molding sand for aluminum alloy casting and preparation method of molding sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550636A true CN104550636A (en) | 2015-04-29 |
Family
ID=53068300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410711032.2A Pending CN104550636A (en) | 2014-12-01 | 2014-12-01 | Molding sand for aluminum alloy casting and preparation method of molding sand |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787990A (en) * | 2018-05-31 | 2018-11-13 | 益阳仪纬科技有限公司 | A kind of preparation method of aluminium alloy casting sand |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3841473A1 (en) * | 1988-12-09 | 1990-06-13 | Heinze Gerald | Moulding sand for foundry purposes |
| DE19643514A1 (en) * | 1996-10-22 | 1998-04-23 | Metallgesellschaft Ag | Process for producing molding sand for foundry purposes |
| CN103272988A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | High-tensile strength molding sand and manufacturing method |
| CN103272989A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand manufactured from chromite sand as main material and manufacturing method thereof |
| CN103272987A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand manufactured from silica sand as main material and manufacturing method thereof |
| CN104057018A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand and preparation method thereof |
-
2014
- 2014-12-01 CN CN201410711032.2A patent/CN104550636A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3841473A1 (en) * | 1988-12-09 | 1990-06-13 | Heinze Gerald | Moulding sand for foundry purposes |
| DE19643514A1 (en) * | 1996-10-22 | 1998-04-23 | Metallgesellschaft Ag | Process for producing molding sand for foundry purposes |
| CN103272988A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | High-tensile strength molding sand and manufacturing method |
| CN103272989A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand manufactured from chromite sand as main material and manufacturing method thereof |
| CN103272987A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand manufactured from silica sand as main material and manufacturing method thereof |
| CN104057018A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787990A (en) * | 2018-05-31 | 2018-11-13 | 益阳仪纬科技有限公司 | A kind of preparation method of aluminium alloy casting sand |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
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| RJ01 | Rejection of invention patent application after publication |