CN105436411B - A kind of high ventilative lost-foam casting method - Google Patents
A kind of high ventilative lost-foam casting method Download PDFInfo
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- CN105436411B CN105436411B CN201511022632.9A CN201511022632A CN105436411B CN 105436411 B CN105436411 B CN 105436411B CN 201511022632 A CN201511022632 A CN 201511022632A CN 105436411 B CN105436411 B CN 105436411B
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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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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Abstract
The present invention discloses a kind of high ventilative lost-foam casting method, including roughing sand, function ingredients and binder, the roughing sand includes fresh sand and reclaimed sand, and fresh sand includes 100 110 parts of silica sand, 6 10 parts of zircon sand by weight, 10 15 parts of forsterite sand, 57 parts of emergy, 35 parts of grog refractory, 35 parts of carbon sand；The function ingredients are the combustible containing carbon fiber, the binder is the mixture of phenolic resin, vegetable oil, tower oil, polyvinyl alcohol, production cost of the present invention is low, improve structural stability, thermal conductivity is good, and refractoriness height and anti acid alkali performance are good, and gas permeability is increased under the premise of ensureing sand bond, bleb defect is reduced, yield rate is increased.
Description
Technical field
The invention belongs to casting technology fields, more particularly, to a kind of high ventilative lost-foam casting method.
Background technology
In casting field, in broad terms, every material for being used for manufacturing casting mold (including sand core, coating etc.) is referred to as making
Proximate matter material.The casting mold used in Foundry Production has sand mold, metal mold, ceramic mould, gypsum mould, graphite mould etc., wherein it is most universal and
Sand mold largely is used, worldwide, the casting produced using sand mold accounts for the 60%- that various casting molds produce casting output
80%, 21 century calls " Green foundry ", and environmental protection realizes that sustainable development is our fundamental state policy, Modeling Material pair
The environmental protection of Foundry Works, green, cleanly production play an important role, and in sand casting and lost foam casting production, will arrange
The discarded old sand of amplification quantity must bring natural environment huge pollution if regeneration treatment and recycling cannot be carried out
Destroy, thus develop it is a kind of environmental protection, of low pollution Modeling Material for current present situation, have great significance.
Invention content
Based on the above technical problem, the invention discloses a kind of high ventilative lost-foam casting methods to be protected using environment-friendly materials
Environment and resource are protected.
The complete technical solution of the present invention includes：
A kind of high ventilative lost-foam casting method, includes the following steps：
Bead prefoam prepares apperance group, and white mould identical with cast shape is made by foaming using polystyrene, pours
Injection system, riser are then bonded to mould by the way of six to eight moulds (i.e. a set of running gate system matches six to eight casting)
Sample group；Apperance group coat drying, vanning, by several times filling molding sand jolt ramming, strike off case mouth, finally cover polyethylene film, negative pressure
Cast, outlet polishing；It is characterized in that, the molding sand includes roughing sand and function ingredients；
The roughing sand includes fresh sand and reclaimed sand, and the fresh sand and reclaimed sand mass ratio are (65-80)：(35-20)；
The fresh sand by weight include 100-110 parts of silica sand, 6-10 parts of zircon sand, 10-15 parts of forsterite sand, just
Beautiful sand 5-7 parts, 3-5 parts of grog refractory, 3-5 parts of carbon sand；
Dioxide-containing silica is 90%-95% in the silica sand, and aluminium oxide is less than 5%, and surplus is inevitably miscellaneous
Matter, granularity are 140-180 mesh, and strict density is 1.75g/cm3 or more, average fineness 52-55；
Zirconia content is more than 70% in the zircon sand, and silica content is less than 28%, and titanium oxide content is less than
0.3%, iron oxide content is less than 0.12%, and alumina content is less than 0.2%, and granularity is 240-280 mesh；
Content of magnesia is 48-55% in the olivine sand, and silica content is less than 45%, and iron oxide content is less than
8%, granularity is 240-280 mesh；
Alumina content is 99-99.5% in the emergy, and granularity is 140-180 mesh；
The grog refractory is that mass ratio is 2:1 bauxite and gangue mixture, wherein aluminium oxide in bauxite
Content is 75%, and refractoriness is more than 1850 DEG C；
The carbonaceous fineness of sand is 160-200 mesh；
The regeneration fineness of sand is 180-240 mesh；
One to two kind of the function ingredients diatomite or attapulgite, granularity are 80-120 mesh, account for the total matter of roughing sand
The 3-5% of amount.
The carbon sand is graphite or coke, granularity are 180 mesh.
The present invention compared with the prior art, using the silica sand of appropriate level as roughing sand principal component, reduces production cost, and
Using grain size small zircon sand and olivine sand, the coefficient of expansion is small, improves structural stability, and thermal conductivity is good, and refractoriness is high, and
Olivine sand also improves the anti acid alkali performance of molding sand, and grog refractory is loose, improves refractoriness, and handle convenient for knockout, adopts
With reclaimed sand, be conducive to environmental protection and recycle, and fine grain reclaimed sand is conducive to improve mold quality, at the same using diatomite or
The porous materials such as attapulgite reduce the usage amount of refractory material as molding sand material, make casting mold lighting, not only improve ring
It protects, and using rational proportioning, increases gas permeability under the premise of ensureing sand bond, reduce bleb defect, increase
Yield rate is added.
Specific implementation mode
The present invention will be further described With reference to embodiment.
A kind of high ventilative lost-foam casting method, includes the following steps：
Bead prefoam prepares apperance group, and white mould identical with cast shape is made by foaming using polystyrene, pours
Injection system, riser are then bonded to mould by the way of six to eight moulds (i.e. a set of running gate system matches six to eight casting)
Sample group；Apperance group coat drying, vanning, by several times filling molding sand jolt ramming, strike off case mouth, finally cover polyethylene film, negative pressure
Cast, outlet polishing；
The molding sand is a kind of ventilative foundry sand, including roughing sand, the first function ingredients, the second function ingredients, bonding
Agent；The roughing sand includes fresh sand and reclaimed sand, and the fresh sand and reclaimed sand mass ratio are (65-80)：(35-20)；
The fresh sand by weight include 100-110 parts of silica sand, 6-10 parts of zircon sand, 10-15 parts of forsterite sand, just
Beautiful sand 5-7 parts, 3-5 parts of grog refractory, 3-5 parts of carbon sand；
Dioxide-containing silica is 90%-95% in the silica sand, and aluminium oxide is less than 5%, and surplus is inevitably miscellaneous
Matter, granularity are 140-180 mesh, and strict density is 1.75g/cm3 or more, average fineness 52-55；
Zirconia content is more than 70% in zircon sand, and silica content is less than 28%, and titanium oxide content is less than 0.3%, oxidation
Iron content is less than 0.12%, and alumina content is less than 0.2%, and granularity is 240-280 mesh；
Content of magnesia is 48-55% in the olivine sand, and silica content is less than 45%, and iron oxide content is less than
8%, granularity is 240-280 mesh,
Alumina content is 99-99.5% in the emergy, and granularity is 140-180 mesh；
The grog refractory is that mass ratio is 2:1 bauxite and gangue mixture, wherein aluminium oxide in bauxite
Content is 75%, and refractoriness is more than 1850 DEG C,
The carbon sand is graphite or coke, granularity are 160-200 mesh,
The regeneration fineness of sand is 180-240 mesh.
First function ingredients are the combustible containing carbon fiber, thin sawdust, agricultural crop straw, thin sawdust granularity
For 160-200 mesh, a diameter of 4-6mm of crop branch fiber；
One to two kind of the second function ingredients diatomite or attapulgite, granularity are 80-120 mesh, account for roughing sand
The 3-5% of gross mass,
The binder is the mixture of phenolic resin, vegetable oil, tower oil, polyvinyl alcohol, and volume ratio is (60-65)：
(4-6)：(2:-3)：(10-15).
Claims (1)
1. a kind of high ventilative lost-foam casting method, includes the following steps：
Bead prefoam prepares apperance group, white mould identical with cast shape is made by foaming using polystyrene, cast is
System, riser are then bonded to apperance group in such a way that six to eight moulds, that is, a set of running gate system matches six to eight casting；Mould
Sample group coat drying, vanning, by several times filling molding sand jolt ramming, strike off case mouth, finally cover polyethylene film, vacuum-assist pouring goes out
Case is polished；It is characterized in that, the molding sand includes roughing sand and function ingredients；
The roughing sand includes fresh sand and reclaimed sand, and the fresh sand and reclaimed sand mass ratio are (65-80)：(35-20)；
The fresh sand includes 100-110 parts of silica sand, 6-10 parts of zircon sand, 10-15 parts of forsterite sand, emergy by weight
5-7 parts, 3-5 parts of grog refractory, 3-5 parts of carbon sand；
Dioxide-containing silica is 90%-95% in the silica sand, and aluminium oxide is less than 5%, and surplus is inevitable impurity, grain
Degree is 140-180 mesh, strict density 1.75g/cm3More than, average fineness 52-55；
Zirconia content is more than 70% in the zircon sand, and silica content is less than 28%, and titanium oxide content is less than 0.3%, oxygen
Change iron content and be less than 0.12%, alumina content is less than 0.2%, and granularity is 240-280 mesh；
Content of magnesia is 48-55% in the forsterite sand, and silica content is less than 45%, and iron oxide content is less than
8%, granularity is 240-280 mesh；
Alumina content is 99-99.5% in the emergy, and granularity is 140-180 mesh；
The grog refractory is that mass ratio is 2:1 bauxite and gangue mixture, wherein alumina content in bauxite
It is 75%, refractoriness is more than 1850 DEG C；
The carbonaceous fineness of sand is 160-200 mesh；
The regeneration fineness of sand is 180-240 mesh；
The function ingredients are one to two kind of diatomite or attapulgite, and granularity is 80-120 mesh, accounts for roughing sand gross mass
3-5%；
The carbon sand is graphite or coke.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511022632.9A CN105436411B (en) | 2015-12-30 | 2015-12-30 | A kind of high ventilative lost-foam casting method |
| PCT/CN2016/107875 WO2017114076A1 (en) | 2015-12-30 | 2016-11-30 | High breathability lost foam casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511022632.9A CN105436411B (en) | 2015-12-30 | 2015-12-30 | A kind of high ventilative lost-foam casting method |
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| Publication Number | Publication Date |
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| CN105436411A CN105436411A (en) | 2016-03-30 |
| CN105436411B true CN105436411B (en) | 2018-08-17 |
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| CN201511022632.9A Active CN105436411B (en) | 2015-12-30 | 2015-12-30 | A kind of high ventilative lost-foam casting method |
Country Status (2)
| Country | Link |
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| CN (1) | CN105436411B (en) |
| WO (1) | WO2017114076A1 (en) |
Families Citing this family (14)
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|---|---|---|---|---|
| CN105537502A (en) * | 2015-12-30 | 2016-05-04 | 青岛博泰美联化工技术有限公司 | Sand casting method of diesel engine component |
| CN105499497B (en) * | 2015-12-30 | 2018-07-27 | 繁峙县中兴华徳联铸有限公司 | A kind of V methods casting technique |
| CN105458158A (en) * | 2015-12-30 | 2016-04-06 | 青岛博泰美联化工技术有限公司 | Environment-friendly foundry molding sand composition |
| CN105583365A (en) * | 2015-12-30 | 2016-05-18 | 青岛博泰美联化工技术有限公司 | Evaporative pattern casting method for diesel engine casing |
| CN105618667B (en) * | 2015-12-30 | 2018-12-14 | 韶关市晟发有色金属有限公司 | A kind of fire resisting casting sand |
| CN105397020A (en) * | 2015-12-30 | 2016-03-16 | 青岛博泰美联化工技术有限公司 | Air permeable casting sand |
| CN105583354A (en) * | 2015-12-30 | 2016-05-18 | 青岛博泰美联化工技术有限公司 | Casting method for cast iron sand mold |
| CN105436411B (en) * | 2015-12-30 | 2018-08-17 | 青岛立准金属有限公司 | A kind of high ventilative lost-foam casting method |
| CN105537516B (en) * | 2015-12-30 | 2018-08-24 | 泊头市亚奇铸业有限公司 | A kind of diesel engine casing sand mould casting method |
| CN105618668A (en) * | 2015-12-30 | 2016-06-01 | 青岛博泰美联化工技术有限公司 | High-strength foundry sand |
| CN106077422A (en) * | 2016-06-23 | 2016-11-09 | 含山县清溪德胜铸造厂 | A kind of production technology of the sand foundry goods pig iron |
| CN107737866A (en) * | 2017-10-12 | 2018-02-27 | 东风精密铸造安徽有限公司 | A kind of novel casting molding sand and preparation method thereof |
| CN114570879B (en) * | 2022-03-09 | 2024-06-21 | 上海大学 | Ceramic shell for monocrystal superalloy blade and preparation method thereof |
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Also Published As
| Publication number | Publication date |
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| CN105436411A (en) | 2016-03-30 |
| WO2017114076A1 (en) | 2017-07-06 |
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Effective date of registration: 20180711 Address after: 266319 Tongxin Village, Jiulong Town, Jiaozhou City, Qingdao City, Shandong Province Applicant after: Qingdao Li quasi Pioneer Metals Corporation Address before: 266555 room 1007, purple Jin Plaza, 658 Jinggangshan Road, Huangdao, Qingdao, Shandong Applicant before: QINGDAO BOTAI MEILIAN CHEMICAL TECHNOLOGY CO., LTD. |
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