CN103586397A - Casting sand for casting stainless steel end enclosure - Google Patents
Casting sand for casting stainless steel end enclosure Download PDFInfo
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- CN103586397A CN103586397A CN201310609123.0A CN201310609123A CN103586397A CN 103586397 A CN103586397 A CN 103586397A CN 201310609123 A CN201310609123 A CN 201310609123A CN 103586397 A CN103586397 A CN 103586397A
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- end socket
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Abstract
The invention relates to casting sand for casting a stainless steel end enclosure. The casting sand for casting the stainless steel end enclosure comprises facing sand and backing sand in a mass ratio of 1: 1, wherein the facing sand comprises the following components by weight percent: 100-200 meshes of crude sand, 1-2% of resin, 10-15% of urotropin, 5-10% of toughening agent, 0.1-0.5% of calcium stearate and 0.5-1.5% of water, in terms of mass percentages relative to the crude sand; the backing sand comprises the following components by weight percent: 40-70 meshes of new sand, 2.5-3.5% of sodium water glass and 10-15% of binder, in terms of mass percentages relative to the new sand. The casting sand for casting the stainless steel end enclosure can avoid phenomena of sand sticking and sand inclusion on the surface of a cast product, can ensure that the cast product has no pores, avoids the defects of shrinkage hole and shrinkage of the cast product, and can improve the yield of the cast products.
Description
Technical field
The present invention relates to a kind of molding sand of casting use, relate in particular to a kind of molding sand for the casting of stainless steel end socket.
Background technology
Stainless steel end socket is a kind of product that is used for shutoff stainless steel pipes, be that pipeline reaches an end afterwards or two end sockets of burn-oning at two of one section of pipe are done a kind of product that container is used, be widely used in the fields such as oil, electronics, heating, chemical industry, medicine, sewage disposal.Stainless steel end socket adopts sand casting, and therefore, the quality of molding sand directly has influence on the quality of end socket.The formula of the molding sand of existing casting end socket is fresh sand 100%, and bentonite 9%～11% and water 4%～4.7%, use pneumatic rammer rramming during moulding, mo(U)ld face brush silica flour wash.With this molding sand, in casting end socket process, rising head cutting is more difficult, at core cavity and outer surface, occurs scab phenomenon, and foundry goods easily produces pore, burning into sand phenomenon, and yield rate is low, does not also reach 50%.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, provides that a kind of casting pressing port cutting quantity is little in casting end socket process, after casting, and the molding sand of foundry goods pore-free, shrinkage cavity and porosity defect.
For achieving the above object, the technical solution used in the present invention is: a kind of molding sand for the casting of stainless steel end socket, it is characterized in that: described molding sand comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of described veil and weight ratio thereof are: 100～200 object roughing sand, resin 1%～2%, methenamine 10%～15%, tough dose 5%～10%, calcium stearate 0.1%～0.5%, water 0.5%～1.5%, described percentage is the mass percent that accounts for described roughing sand; The constituent of described back of the body yarn and weight ratio thereof are: 40～70 object fresh sands, and sodium silicate 2.5%～3.5%, binding agent 10%～15%, described percentage is the mass percent that accounts for described fresh sand.
In a preferred embodiment of the present invention, further comprise that described molding sand comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of described veil and weight ratio thereof are: 160 object roughing sand, resin 1.5%, methenamine 12%, tough dose 7%, calcium stearate 0.3%, water 1%, described percentage is the mass percent that accounts for described roughing sand; The constituent of described back of the body yarn and weight ratio thereof are: 60 object fresh sands, and sodium silicate 3%, binding agent 12%, described percentage is the mass percent that accounts for described fresh sand.
In a preferred embodiment of the present invention, further comprise that described roughing sand is zircon sand.
In a preferred embodiment of the present invention, further comprise that described fresh sand is the quartz sand of water content >=96%.
In a preferred embodiment of the present invention, further comprise that described binding agent is lithium bentonite.
The invention solves the defect existing in background technology, the molding sand for the casting of stainless steel end socket of the present invention can be avoided the phenomenon of scab, burning into sand, can guarantee foundry goods pore-free, shrinkage cavity and porosity defect, can improve the yield rate of foundry goods.
The specific embodiment
The present invention is further detailed explanation in conjunction with the embodiments now.
A kind of molding sand for the casting of stainless steel end socket, it comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of veil and weight ratio thereof are: 100～200 object roughing sand, resin 1%～2%, methenamine 10%～15%, tough dose 5%～10%, calcium stearate 0.1%～0.5%, water 0.5%～1.5%, said percentage is the mass percent that accounts for roughing sand; Constituent and the weight ratio thereof of back of the body yarn are: 40～70 object fresh sands, and sodium silicate 2.5%～3.5%, binding agent 10%～15%, said percentage is the mass percent that accounts for fresh sand.
Preferably, a kind of molding sand for the casting of stainless steel end socket, it comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of veil and weight ratio thereof are: 160 object roughing sand, resin 1.5%, methenamine 12%, tough dose 7%, calcium stearate 0.3%, water 1%, said percentage is the mass percent that accounts for roughing sand; Constituent and the weight ratio thereof of back of the body yarn are: 60 object fresh sands, and sodium silicate 3%, binding agent 12%, said percentage is the mass percent that accounts for described fresh sand.
In the present invention, roughing sand is zircon sand, the quartz sand that fresh sand is water content >=96%, and binding agent adopts lithium bentonite.
In the present invention, in moulding snad composition, add resin, can improve the adhesive force of molding sand, avoid when casting, foundry goods produces shrinkage defect; Add methenamine and tough dose, in order to improve the curability of molding sand, further avoid when casting, foundry goods produces shrinkage defect; Add calcium stearate to increase the lubricity of molding sand, avoid occurring scab phenomenon in casting process, avoid cast(ing) surface burning into sand; The sodium silicate adding can infiltrate in gap and hole, can stop up capillary porosity duct, improves density and the intensity of molding sand, and then reduces feeding, the cutting quantity of rising head when reducing foundry goods; With lithium bentonite, as binding agent, to increase the suspension of molding sand, avoid, when foundry goods, occurring the defects such as pore, shrinkage cavity.
Embodiment 1:
A kind of molding sand for the casting of stainless steel end socket, it comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of veil and weight ratio thereof are: 100 object roughing sand, resin 1%, methenamine 10%, tough dose 5%, calcium stearate 0.1%, water 0.5%, said percentage is the mass percent that accounts for roughing sand; Constituent and the weight ratio thereof of back of the body yarn are: 40 object fresh sands, and sodium silicate 2.5%, binding agent 10%, said percentage is the mass percent that accounts for fresh sand.Roughing sand is zircon sand, the quartz sand that fresh sand is water content >=96%, and binding agent adopts lithium bentonite.
Embodiment 2:
A kind of molding sand for the casting of stainless steel end socket, it comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of veil and weight ratio thereof are: 200 object roughing sand, resin 2%, methenamine 15%, tough dose 10%, calcium stearate 0.5%, water 1.5%, said percentage is the mass percent that accounts for roughing sand; Constituent and the weight ratio thereof of back of the body yarn are: 70 object fresh sands, and sodium silicate 3.5%, binding agent 15%, said percentage is the mass percent that accounts for fresh sand.Roughing sand is zircon sand, the quartz sand that fresh sand is water content >=96%, and binding agent adopts lithium bentonite.
Embodiment 3:
A kind of molding sand for the casting of stainless steel end socket, it comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of veil and weight ratio thereof are: 160 object roughing sand, resin 1.5%, methenamine 12%, tough dose 7%, calcium stearate 0.3%, water 1%, said percentage is the mass percent that accounts for roughing sand; Constituent and the weight ratio thereof of back of the body yarn are: 60 object fresh sands, and sodium silicate 3%, binding agent 12%, said percentage is the mass percent that accounts for described fresh sand.Roughing sand is zircon sand, the quartz sand that fresh sand is water content >=96%, and binding agent adopts lithium bentonite.
The sand casting end socket made from molding sand of the present invention, casting yield 100%, yield rate brings up to 68%.
Above foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, related personnel can, within not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on description, must determine technical scope according to claim scope.
Claims (5)
1. the molding sand for stainless steel end socket casting, it is characterized in that: described molding sand comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of described veil and weight ratio thereof are: 100～200 object roughing sand, resin 1%～2%, methenamine 10%～15%, tough dose 5%～10%, calcium stearate 0.1%～0.5%, water 0.5%～1.5%, described percentage is the mass percent that accounts for described roughing sand; The constituent of described back of the body yarn and weight ratio thereof are: 40～70 object fresh sands, and sodium silicate 2.5%～3.5%, binding agent 10%～15%, described percentage is the mass percent that accounts for described fresh sand.
2. a kind of molding sand for stainless steel end socket casting according to claim 1, it is characterized in that: described molding sand comprises that mass ratio is facing sand and the floor sand of 1:1, the constituent of described veil and weight ratio thereof are: 160 object roughing sand, resin 1.5%, methenamine 12%, tough dose 7%, calcium stearate 0.3%, water 1%, described percentage is the mass percent that accounts for described roughing sand; The constituent of described back of the body yarn and weight ratio thereof are: 60 object fresh sands, and sodium silicate 3%, binding agent 12%, described percentage is the mass percent that accounts for described fresh sand.
3. a kind of molding sand for the casting of stainless steel end socket according to claim 1 and 2, is characterized in that: described roughing sand is zircon sand.
4. a kind of molding sand for the casting of stainless steel end socket according to claim 1 and 2, is characterized in that: the quartz sand that described fresh sand is water content >=96%.
5. a kind of molding sand for the casting of stainless steel end socket according to claim 1 and 2, is characterized in that: described binding agent is lithium bentonite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310609123.0A CN103586397A (en) | 2013-11-27 | 2013-11-27 | Casting sand for casting stainless steel end enclosure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310609123.0A CN103586397A (en) | 2013-11-27 | 2013-11-27 | Casting sand for casting stainless steel end enclosure |
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| CN103586397A true CN103586397A (en) | 2014-02-19 |
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| CN201310609123.0A Pending CN103586397A (en) | 2013-11-27 | 2013-11-27 | Casting sand for casting stainless steel end enclosure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259380A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨理工大学 | Composite modified water glass sand with high collapsibility and preparation method thereof |
| CN104690211A (en) * | 2015-02-04 | 2015-06-10 | 繁昌县金科机电科技有限公司 | Fast-cured precoated sand for hot method and preparation method thereof |
| CN105127360A (en) * | 2014-12-16 | 2015-12-09 | 株式会社帝尔鄂世稳 | Inorganic binder composition for castings |
| CN109158526A (en) * | 2018-10-19 | 2019-01-08 | 含山县兴达球墨铸铁厂 | A kind of die casting sand formulation |
| CN109967690A (en) * | 2019-03-27 | 2019-07-05 | 烟台通鼎舟汽车零部件有限公司 | A kind of thin-walled aluminium alloy castings gravitational casting precoated sand and its application method |
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| JPS5499039A (en) * | 1978-01-23 | 1979-08-04 | Ebara Mfg | Production of core mold for precise casting |
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| JPS5499039A (en) * | 1978-01-23 | 1979-08-04 | Ebara Mfg | Production of core mold for precise casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259380A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨理工大学 | Composite modified water glass sand with high collapsibility and preparation method thereof |
| CN105127360A (en) * | 2014-12-16 | 2015-12-09 | 株式会社帝尔鄂世稳 | Inorganic binder composition for castings |
| CN104690211A (en) * | 2015-02-04 | 2015-06-10 | 繁昌县金科机电科技有限公司 | Fast-cured precoated sand for hot method and preparation method thereof |
| CN109158526A (en) * | 2018-10-19 | 2019-01-08 | 含山县兴达球墨铸铁厂 | A kind of die casting sand formulation |
| CN109967690A (en) * | 2019-03-27 | 2019-07-05 | 烟台通鼎舟汽车零部件有限公司 | A kind of thin-walled aluminium alloy castings gravitational casting precoated sand and its application method |
| CN109967690B (en) * | 2019-03-27 | 2020-08-18 | 烟台通鼎舟汽车零部件有限公司 | Precoated sand for gravity casting of thin-wall aluminum alloy casting and using method thereof |
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Application publication date: 20140219 |