CN106513565A - Foundry molding sand - Google Patents
Foundry molding sand Download PDFInfo
- Publication number
- CN106513565A CN106513565A CN201611214662.4A CN201611214662A CN106513565A CN 106513565 A CN106513565 A CN 106513565A CN 201611214662 A CN201611214662 A CN 201611214662A CN 106513565 A CN106513565 A CN 106513565A
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- China
- Prior art keywords
- sand
- parts
- molding sand
- foundry molding
- casting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention provides foundry molding sand. The foundry molding sand comprises, by weight, 35-40 parts of bentonite, 0.2-1 part of binder, 15-20 parts of silica sand, 5-10 parts of zircon sand, 15-20 parts of magnesite, 3-6 parts of olivine sand, 15-20 parts of silicone rubber and 30-40 parts of alloying pellets. According to the foundry molding sand, the zircon sand and the magnesite are small in dilatation coefficient when being heated, the zircon sand and the magnesite are mixed with the silica sand to serve as crude sand of the foundry molding sand, the dilatation coefficient is reduced, the structural stability is improved, the condensation speed of castings is made uniform, and cracks and shrinkage cavities cannot be formed in the casting surfaces easily after condensation. Ceramsite is added, the high temperature resistance and acid-base erosion resistance are improved, and recycling can further be achieved. By adding a small amount of binder, the viscosity of the foundry molding sand can be enhanced.
Description
Technical field
The present invention relates to casting technology field, and in particular to a kind of moulding sand for casting.
Background technology
Molding sand is the material in casting for moulding.Molding sand is typically by Foundry sand, moulding sand binder and additional thing
Mixed Deng Modeling Material according to a certain percentage, it is also possible to natural silica sand argillaceous, the sand formulation of common cast aluminium
Sand particle diameter is too big or too little, and molding sand material footpath is too big, although breathability is preferable, but aloxite part surface is relatively rough, bright and clean
Degree is bad, and molding sand material footpath is too little, causes mo ld void bad, and aluminium casting has pore to produce.Domestic and international widely used coal dust
Clay green-sand, is typically blended with water by roughing sand, binding agent, coal dust additive etc., with 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 generation in casting process coal dust firing
Toxic gas 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., with clay-bonded sand,
Water-glass sand and quartz sand it is most.Effect of the molding sand in Foundry Production is particularly important, makes because of the poor quality of molding sand
Into casting wasted product account for the 30～50% of the total waste product of foundry goods.Requirement generally to molding sand is：1st, with higher intensity and heat
Stability, to bear the effect of various external force and high temperature.2nd, good mobility, i.e. molding sand are under external force or action of gravity itself
The ability being mutually shifted between sand grains.3rd, certain plasticity, i.e. molding sand deform under external force, can keep after external force is removed
The ability of the shape for being given.4th, the ability of preferable breathability, i.e. molding sand hole through gas.5th, 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.
The content of the invention
Not enough for prior art, the present invention provides a kind of moulding sand for casting, overcomes the deficiencies in the prior art, the molding sand
With high breathability, collapsibility, foundry goods brightness can be improved the characteristics of.
For realizing object above, technical scheme is achieved by the following technical programs：
A kind of moulding sand for casting, including the raw material of following weight portion：Bentonite 35-40 parts, binding agent 0.2-1 parts, silicon
Sand 15-20 parts, white sand 5-10 parts, magnesia 15-20 parts, olivine sand 3-6 parts, 15-20 parts silicone rubber and 30-40 part alloying pellets.
Described bentonite calcines 3-4 hours in being put into 560-580 DEG C of calcining furnace, then, takes out, is ground into 200-400
Mesh powder.
The one kind of described alloying pellet for nickel-base alloy, molybdenum-base alloy, niobium-base alloy or tungsten-bast alloy.
The present invention provides a kind of moulding sand for casting, and advantage is compared with prior art：The white sand of the present invention and magnesia are heated
When the coefficient of expansion it is less, white sand and magnesia mixed with silica sand the roughing sand as casting sand, the coefficient of expansion is reduced, raising finishes
Structure stability so that foundry goods condensation rate is uniform, and cast(ing) surface is not likely to produce crackle and shrinkage cavity after condensation；Nice foundry sand is added, is carried
The high temperature resistant of high molding sand, antiacid alkali erosiveness, can also recycle；Add a small amount of binding agent cause the viscous of casting sand
Property strengthen.
Specific embodiment
For making purpose, technical scheme and the advantage of the embodiment of the present invention clearer, with reference to the embodiment of the present invention pair
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of the invention
Embodiment, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the premise of the property made work, belongs to the scope of protection of the invention.
A kind of moulding sand for casting, including the raw material of following weight portion：Bentonite 35-40 parts, binding agent 0.2-1 parts, silicon
Sand 15-20 parts, white sand 5-10 parts, magnesia 15-20 parts, olivine sand 3-6 parts, 15-20 parts silicone rubber and 30-40 part alloying pellets；
Described bentonite calcines 3-4 hours in being put into 560-580 DEG C of calcining furnace, then, takes out, is ground into 200-400 mesh powder；Institute
The one kind of the alloying pellet stated for nickel-base alloy, molybdenum-base alloy, niobium-base alloy or tungsten-bast alloy.
When the white sand of the present invention and magnesia are heated, the coefficient of expansion is less, and white sand and magnesia are mixed as casting sand with silica sand
Roughing sand, reduce the coefficient of expansion, improve structural stability so that foundry goods condensation rate is uniform, and cast(ing) surface is difficult after condensation
Crack and shrinkage cavity；Nice foundry sand is added, the high temperature resistant of molding sand, antiacid alkali erosiveness is improved, can also be recycled；Add few
Amount binding agent can cause the viscosity of casting sand to strengthen.
It should be noted that above example is only to illustrate technical scheme, rather than a limitation；Although ginseng
The present invention is described in detail according to previous embodiment, it will be understood by those within the art that：Which still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent is carried out to which part technical characteristic；And
These modifications are replaced, and do not make the essence of appropriate technical solution depart from spirit and the model of various embodiments of the present invention technical scheme
Enclose.
Claims (3)
1. a kind of moulding sand for casting, it is characterised in that including the raw material of following weight portion：Bentonite 35-40 parts, binding agent
0.2-1 parts, silica sand 15-20 parts, white sand 5-10 parts, magnesia 15-20 parts, olivine sand 3-6 parts, 15-20 parts silicone rubber and 30-40
Part alloying pellet.
2. moulding sand for casting according to claim 1, it is characterised in that：Described bentonite is put into 560-580 DEG C of calcining
3-4 hours are calcined in stove, then, are taken out, are ground into 200-400 mesh powder.
3. moulding sand for casting according to claim 1, it is characterised in that：Described alloying pellet is nickel-base alloy, molybdenio conjunction
One kind of gold, niobium-base alloy or tungsten-bast alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214662.4A CN106513565A (en) | 2016-12-26 | 2016-12-26 | Foundry molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214662.4A CN106513565A (en) | 2016-12-26 | 2016-12-26 | Foundry molding sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106513565A true CN106513565A (en) | 2017-03-22 |
Family
ID=58338660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611214662.4A Pending CN106513565A (en) | 2016-12-26 | 2016-12-26 | Foundry molding sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106513565A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398526A (en) * | 2017-09-30 | 2017-11-28 | 江苏闽江矿业有限公司 | A kind of high intensity sand formulation |
| CN107414013A (en) * | 2017-06-30 | 2017-12-01 | 安徽省辉煌机械制造有限公司 | A kind of swage molding sand for the coefficient of expansion for reducing quartz sand |
| CN107649642A (en) * | 2017-10-27 | 2018-02-02 | 湖州正德轻工机械有限公司 | A kind of inexpensive molding sand |
| CN107671231A (en) * | 2017-09-29 | 2018-02-09 | 马鞍山松鹤信息科技有限公司 | A kind of aluminium alloy casting sand and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030101907A1 (en) * | 2002-11-08 | 2003-06-05 | Brown Richard K. | Sand casting foundry composition and method using shale as an anti-veining agent |
| CN101524741A (en) * | 2009-04-22 | 2009-09-09 | 安徽省宁国新宁实业有限公司 | Vertical-parting casting ball and casting section die |
| CN103495697A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | Anti-adhesive saw-dust molding 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 |
| CN105170877A (en) * | 2015-09-15 | 2015-12-23 | 蚌埠冠宜型材科技有限公司 | Molding sand for casting |
| CN106040965A (en) * | 2016-08-15 | 2016-10-26 | 合肥江淮铸造有限责任公司 | Molding sand for casting |
-
2016
- 2016-12-26 CN CN201611214662.4A patent/CN106513565A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030101907A1 (en) * | 2002-11-08 | 2003-06-05 | Brown Richard K. | Sand casting foundry composition and method using shale as an anti-veining agent |
| CN101524741A (en) * | 2009-04-22 | 2009-09-09 | 安徽省宁国新宁实业有限公司 | Vertical-parting casting ball and casting section die |
| CN103495697A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | Anti-adhesive saw-dust molding 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 |
| CN105170877A (en) * | 2015-09-15 | 2015-12-23 | 蚌埠冠宜型材科技有限公司 | Molding sand for casting |
| CN106040965A (en) * | 2016-08-15 | 2016-10-26 | 合肥江淮铸造有限责任公司 | Molding sand for casting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414013A (en) * | 2017-06-30 | 2017-12-01 | 安徽省辉煌机械制造有限公司 | A kind of swage molding sand for the coefficient of expansion for reducing quartz sand |
| CN107671231A (en) * | 2017-09-29 | 2018-02-09 | 马鞍山松鹤信息科技有限公司 | A kind of aluminium alloy casting sand and preparation method thereof |
| CN107398526A (en) * | 2017-09-30 | 2017-11-28 | 江苏闽江矿业有限公司 | A kind of high intensity sand formulation |
| CN107649642A (en) * | 2017-10-27 | 2018-02-02 | 湖州正德轻工机械有限公司 | A kind of inexpensive molding sand |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |
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| RJ01 | Rejection of invention patent application after publication |