CN104057014B - A kind of molding sand for casting gray iron and preparation method thereof - Google Patents

A kind of molding sand for casting gray iron and preparation method thereof Download PDF

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Publication number
CN104057014B
CN104057014B CN201410229460.1A CN201410229460A CN104057014B CN 104057014 B CN104057014 B CN 104057014B CN 201410229460 A CN201410229460 A CN 201410229460A CN 104057014 B CN104057014 B CN 104057014B
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sand
molding sand
casting
calcining
meal
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CN104057014A (en
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朱安会
马洪章
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Anhui Xin Run Type Material Co Ltd
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Abstract

A kind of molding sand for casting gray iron, is prepared by the raw materials in: quartz sand 250-280, meerschaum 40-45, loess 160-170, conch meal 30-35, titanium dioxide 20-25, grass meal 40-45, acrylic emulsion 2-3, carborundum 30-40, coal dust 10-15, Gypsum Fibrosum 50-60, zinc stearate 3-4, bentonite 10-15, ammonium dihydrogen phosphate 3-4, sodium bicarbonate 4-5, dodecylbenzene sodium sulfonate 2-3, carbamide 4-6, flour 10-12, wood bamboo powder 40-45, water are appropriate.Present invention uses meerschaum, loess, bentonite etc. through calcining, have the plasticity of excellence, caking property, by using conch meal, grass meal, wood bamboo powder etc., add breathability, by using titanium dioxide, add dispersibility, high temperature collapsibility is good;By using coal dust, making cast(ing) surface light, the present invention improves casting yield.

Description

A kind of Molding sand for casting gray iron And preparation method thereof
Technical field
The present invention relates to casting field, particularly relate to a kind of molding sand for casting gray iron and preparation method thereof.
Background technology
Molding sand is the material in casting for moulding.Molding sand is typically mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things, also can be with natural silica sand argillaceous, the sand formulation Sand particle diameter of common cast aluminium is the biggest or the least, molding sand material footpath is the biggest, although breathability is preferable, but aloxite part surface ratio is rougher, fineness is bad, molding sand material footpath is the least, causes mo ld void bad, and aluminium casting has pore to produce.Domestic and international widely used coal dust clay green-sand, typically it is blended with water by roughing sand, binding agent, coal dust additive etc., there is certain Sand sticking-resistant effect and the advantage that the cost of material is low, production efficiency is high, but its consumption is big, discharge is serious, decompose at casting process coal dust firing and produce toxic gas and pollute.
Molding sand is different by binding agent used, can be divided into clay-bonded sand, water-glass sand, cement bonded sand, quartz sand etc., most with clay-bonded sand, water-glass sand and quartz sand.Molding sand effect in Foundry Production is particularly important, and the casting wasted product caused because of the poor quality of molding sand accounts for the 30~50% of the total waste product of foundry goods.The generally requirement to molding sand is: 1, have higher intensity and heat stability, to bear the effect of various external force and high temperature.2, the ability that good mobility, i.e. molding sand are mutually shifted between sand grains under external force or action of gravity own.3, certain plasticity, i.e. molding sand deform under external force, can keep the ability of the shape given after external force is removed.4, preferable breathability, i.e. molding sand hole are through the ability of gas.5, high collapsibility, also known as knockability, i.e. after casting solidification, whether molding sand is easily destroyed, if the performance easily removed from foundry goods.
Current casting field quickly grows, and the performance requirement for steel-casting and ironcasting is higher, thus it requires promote the performance of molding sand further.
Summary of the invention
It is an object of the invention to provide a kind of molding sand for casting gray iron and preparation method thereof, this molding sand has that plasticity is good, good permeability, high temperature collapsibility are good, the feature of non-caked foundry goods.
Technical scheme is as follows:
A kind of molding sand for casting gray iron, it is characterised in that be prepared by the raw materials in: quartz sand 250-280, meerschaum 40-45, loess 160-170, conch meal 30-35, titanium dioxide 20-25, grass meal 40-45, acrylic emulsion 2-3, carborundum 30-40, coal dust 10-15, Gypsum Fibrosum 50-60, zinc stearate 3-4, bentonite 10-15, ammonium dihydrogen phosphate 3-4, sodium bicarbonate 4-5, dodecylbenzene sodium sulfonate 2-3, carbamide 4-6, flour 10-12, wood bamboo powder 40-45, water are appropriate.
The preparation method of described molding sand for casting gray iron, it is characterized in that comprising the following steps: quartz sand, meerschaum, loess, conch meal, bentonite, Gypsum Fibrosum are put in 520-540 DEG C of calcining furnace and calcined 4-5 hour, then take out, it is ground into 250-350 mesh powder, is subsequently adding grass meal, titanium dioxide, carborundum suitable quantity of water, dispersed with stirring, pugging, send in 1420-1450 DEG C of calcining furnace and calcine 3-5 hour, take out and be crushed to 50-100 mesh, obtain calcining material;By zinc stearate, ammonium dihydrogen phosphate, sodium bicarbonate, dodecylbenzene sodium sulfonate, carbamide, flour, acrylic emulsion mixing, grind 30-40 minute, mix 15-20 minute with calcining material, other residual components, to obtain final product.
Beneficial effects of the present invention
Present invention uses meerschaum, loess, bentonite etc. through calcining, have the plasticity of excellence, caking property, by using conch meal, grass meal, wood bamboo powder etc., add breathability, by using titanium dioxide, add dispersibility, high temperature collapsibility is good;By using coal dust, making cast(ing) surface light, the present invention is prone to moulding, coremaking, and shrinkage factor is little, and casting dimension is accurate, solves foundry goods shrinkage cavity and porosity effect and reaches more than 90%, improves casting yield.
Detailed description of the invention
A kind of molding sand for casting gray iron, is made up of the raw material of following weight portion (kilogram): quartz sand 260, meerschaum 43, loess 165, conch meal 33, titanium dioxide 23, grass meal 43, acrylic emulsion 2.5, carborundum 35, coal dust 13, Gypsum Fibrosum 55, zinc stearate 3.5, bentonite 13, ammonium dihydrogen phosphate 3.5, sodium bicarbonate 4.5, dodecylbenzene sodium sulfonate 2.5, carbamide 5, flour 11, wood bamboo powder 43, water are appropriate.
The preparation method of described molding sand for casting gray iron, comprise the following steps: quartz sand, meerschaum, loess, conch meal, bentonite, Gypsum Fibrosum are put in 530 DEG C of calcining furnaces and calcined 4.5 hours, then take out, it is ground into 300 mesh powder, is subsequently adding grass meal, titanium dioxide, carborundum suitable quantity of water, dispersed with stirring, pugging, send in 1430 DEG C of calcining furnaces and calcine 4 hours, take out and be crushed to 80 mesh, obtain calcining material;By zinc stearate, ammonium dihydrogen phosphate, sodium bicarbonate, dodecylbenzene sodium sulfonate, carbamide, flour, acrylic emulsion mixing, grind 35 minutes, mix 18 minutes with calcining material, other residual components, to obtain final product.
The sand test data that the present embodiment obtains are as follows: high temperature compression strength is at more than 0.91Mpa, and gas forming amount is less than below 13.9ml/g, heat-resistant time 170 seconds, and room temperature tensile intensity is more than 0.01Mpa, and hot-drawn intensity is more than 0.015Mpa.

Claims (1)

1. a molding sand for casting gray iron, it is characterised in that be prepared by the raw materials in: quartz sand 250-280, meerschaum 40-45, loess 160-170, conch meal 30-35, titanium dioxide 20-25, grass meal 40-45, acrylic emulsion 2-3, carborundum 30-40, coal dust 10-15, Gypsum Fibrosum 50-60, zinc stearate 3-4, bentonite 10-15, ammonium dihydrogen phosphate 3-4, sodium bicarbonate 4-5, dodecylbenzene sodium sulfonate 2-3, carbamide 4-6, flour 10-12, wood bamboo powder 40-45, water are appropriate;
The preparation method of described molding sand for casting gray iron comprises the following steps: quartz sand, meerschaum, loess, conch meal, bentonite, Gypsum Fibrosum are put in 520-540 DEG C of calcining furnace and calcined 4-5 hour, then take out, it is ground into 250-350 mesh powder, it is subsequently adding grass meal, titanium dioxide, carborundum suitable quantity of water, dispersed with stirring, pugging, send in 1420-1450 DEG C of calcining furnace and calcine 3-5 hour, taking-up is crushed to 50-100 mesh, obtains calcining material;By zinc stearate, ammonium dihydrogen phosphate, sodium bicarbonate, dodecylbenzene sodium sulfonate, carbamide, flour, acrylic emulsion mixing, grind 30-40 minute, mix 15-20 minute with calcining material, other residual components, to obtain final product.
CN201410229460.1A 2014-05-28 2014-05-28 A kind of molding sand for casting gray iron and preparation method thereof Expired - Fee Related CN104057014B (en)

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Families Citing this family (19)

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CN104475653B (en) * 2014-11-03 2016-12-07 芜湖市华鑫精密铸件有限公司 A kind of highly-breathable molding sand and preparation method thereof
CN104475643A (en) * 2014-11-03 2015-04-01 繁昌县琦祥铸造厂 Carbon steel cast molding sand and preparation method thereof
CN104646602A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Anti-staining foundry molding sand and preparation method thereof
CN104646599A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Heat-resisting molding sand with high bonding performance and preparation method thereof
CN104646595A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Core molding sand containing spherical quartz and preparation method of core molding sand
CN104646596A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Creep resistant molding sand and preparation method thereof
CN104646601A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Molding sand for large mold core and preparation method thereof
CN104646600A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Anti-cracking heat-resistant molding sand and preparation method thereof
CN104646594A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Molding sand for machine molding and preparation method thereof
CN104841856A (en) * 2015-05-07 2015-08-19 马鞍山市恒毅机械制造有限公司 Molding sand with reducibility and preparation method thereof
CN105170872A (en) * 2015-08-19 2015-12-23 合肥市田源精铸有限公司 Novel molding sand
CN105170880A (en) * 2015-08-19 2015-12-23 合肥市田源精铸有限公司 Environment-friendly molding sand
CN105964878A (en) * 2016-03-10 2016-09-28 繁昌县琪鑫铸造有限公司 High-gas-permeability wet molding sand used for gray iron casting and manufacturing method thereof
CN105903890A (en) * 2016-05-26 2016-08-31 合肥市田源精铸有限公司 Easily-collapsing green sand
CN105903887A (en) * 2016-05-26 2016-08-31 合肥市田源精铸有限公司 High-performance green sand
CN107935566B (en) * 2017-11-30 2021-05-11 共享智能装备有限公司 Sintered ceramsite for casting and preparation method thereof
CN108705026B (en) * 2018-06-22 2020-07-14 佛山市高明利钢精密铸造有限公司 Preparation method of special molding sand for casting stainless steel parts with complex shapes
CN108465772B (en) * 2018-06-22 2020-02-07 佛山市高明利钢精密铸造有限公司 Preparation method of molding sand special for integral casting of large stainless steel parts
CN110681817B (en) * 2019-09-29 2021-02-26 含山县能华铸造有限公司 Preparation method of binder for pig iron investment casting

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JPH05200478A (en) * 1992-01-28 1993-08-10 Hitachi Metals Ltd Manufacture of spheroidal graphite cast iron
CN102728775B (en) * 2012-06-08 2014-02-12 繁昌县琦祥铸造厂 Molding sand containing wood fiber and production method thereof
CN103521681A (en) * 2013-10-16 2014-01-22 合肥市田源精铸有限公司 Molding sand and preparation method thereof
CN103495694A (en) * 2013-10-16 2014-01-08 合肥市田源精铸有限公司 Yellow-soil foundry sand and preparation method thereof
CN103521695A (en) * 2013-10-16 2014-01-22 合肥市田源精铸有限公司 Molding sand for casting iron balls and preparation method of molding sand

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Inventor after: Zhang Zhigong

Inventor before: Zhu Anhui

Inventor before: Ma Hongzhang

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Effective date of registration: 20170815

Address after: 461435, Henan province Taikang County town plate village administrative village leaf village

Patentee after: Zhang Zhigong

Address before: 233050, Anhui Bengbu hi tech Zone Qin Zhen town Expressway material field

Patentee before: Anhui Xin Run type material company limited

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Granted publication date: 20160824

Termination date: 20180528