CN101439400A - Method for casting multiple elongated holes on large-sized thick-wall iron casting with furan bonded sand core - Google Patents

Method for casting multiple elongated holes on large-sized thick-wall iron casting with furan bonded sand core Download PDF

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Publication number
CN101439400A
CN101439400A CNA2008102338411A CN200810233841A CN101439400A CN 101439400 A CN101439400 A CN 101439400A CN A2008102338411 A CNA2008102338411 A CN A2008102338411A CN 200810233841 A CN200810233841 A CN 200810233841A CN 101439400 A CN101439400 A CN 101439400A
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China
Prior art keywords
core
elongated hole
cast
thick
casting
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Pending
Application number
CNA2008102338411A
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Chinese (zh)
Inventor
王向阳
陈阵
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NINGXIA GONGXIANG GROUP CO Ltd
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NINGXIA GONGXIANG GROUP CO Ltd
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Priority to CNA2008102338411A priority Critical patent/CN101439400A/en
Publication of CN101439400A publication Critical patent/CN101439400A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a method for casting a large thick-wall iron casting furan resin sand core, in particular to a method for casing a plurality of long and thin holes in the large thick-wall iron casting furan resin sand core. The invention is characterized in that the method comprises the steps as follows: preparing for manufacturing a core, molding, manufacturing the core, assembling a mould, pouring and cleaning. The invention provides the method for casting a plurality of long and thin holes in the large thick-wall iron casting furan resin sand core, the method is unique and simple, adopts widely-used furan resin sand, can not cause the casting defects such as sintering, sand burning and the like and can obtain a plurality of long and thin holes with the radial deflection less than plus or minus 2mm at a large thick-wall iron casting with low cost.

Description

A kind of large thick-wall ironcasting furane resins core is cast the method for a plurality of elongated hole
Technical field
The present invention relates to a kind of casting method of large thick-wall ironcasting furane resins core, especially relate to the method that a kind of large thick-wall ironcasting furane resins core is cast a plurality of elongated hole.
Background technology
Elongated hole is in the condition of high temperature for a long time in big section motlten metal, can cause the danger of elongated hole chip bending and sintering, scab, and a plurality of elongated hole have just more increased this defective odds, surpass when casting out tens array elongated hole in the cast iron of 100mm at present at large-scale, heavy wall, when length diameter ratio greater than 20, for sand casting be quite the difficulty and have height to scrap risk.Generally to select extraordinary formative method and material could produce this foundry goods.Such as using ceramic core, core shooting or covering sand technology etc., the shortcoming of this casting method is that equipment, mould investment are high, only is suitable for producing in enormous quantities.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of process uniqueness, simple, adopt widely used furan resin-sand, do not have casting flaws such as sintering, scab, on the large thick-wall ironcasting, can obtain the blowhole radial-deformation is cast a plurality of elongated hole less than a kind of large thick-wall ironcasting furane resins core of a plurality of elongated hole of ± 2mm method cheaply.
The present invention realizes in the following way:
A kind of large thick-wall ironcasting furane resins core is cast the method for a plurality of elongated hole, and it is characterized in that: it comprises the steps:
A. the preparation of coremaking: according to the diameter and the length of core, but in molding sand, add the materials A and the B of the high-temperature gasification of different proportion during coremaking, be mixed uniformly, manufactured size, the uniform arbor of material, prepare special-purpose filling, consolidation instrument;
B. moulding, coremaking: arbor is put into the centre of core, use special-purposely fill, the consolidation instrument will mix the core sand that makes and successively insert core box and carry out consolidation, treat that core sclerosis back takes out core from core box, the brushing cast paint is stand-by;
C. mould assembling, cast: check whether the elongated hole core has crackle, then the elongated hole core is assembled with fixture and fix the conventional method of its mould assembling and cast employing iron casting production;
D. cleaning;
But the materials A of described high-temperature gasification and B are respectively liquid resin and resin polycondensation reaction promoter, the weight percentage 1%~8% of A wherein, and the weight of B is 0.3~4%;
Described arbor is with core carbon steel;
One end of described fuse can freely stretch.
The present invention has following effect:
1) the technology uniqueness, make core keep rigidity and avoid sintering: elongated hole is being in the condition of high temperature for a long time in big section motlten metal, can cause the danger of elongated hole chip bending and sintering, scab, and a plurality of elongated hole have just more increased this defective odds, not meeting of a hole all is unacceptable, prevents that elongated hole bending and scab from being main points of the present invention.Its principle of method provided by the invention is: the elongated hole vertical casting.A plurality of holes, especially a plurality of measure-alike array elongated hole adopt the core print seat part disjunctor in several holes.In core, add the gasifiable substance A+B of high temperature, but the materials A of described high-temperature gasification and B are respectively liquid resin and resin polycondensation reaction promoter, the weight percentage 1%~8% of A wherein, the weight percentage of B is 0.3 ~ 4%, utilizes gasification from cooling off core.Rely on the gasification heat absorption to take away the heat of the core heart portion when making core be subjected to axial buoyancy and prevent deflection, make core maintenance rigidity and avoid sintering.
2) solved the crooked and sticking dead problem of elongated hole in large thick-wall cast iron: this easy and practical self cooling production method of core provided by the invention, see in actual production and follow-up effect, make the foundry goods elongated hole very little by sticking dead probability, there is not waste product, crooked degree is within 1~2mm, satisfy customer requirement fully, having produced hundreds of heavy wall has elongated hole foundry goods and heavy wall that a plurality of array elongated hole foundry goods are arranged, and has all successfully solved the crooked and sticking dead problem of elongated hole in large thick-wall cast iron.
The specific embodiment
A kind of large thick-wall ironcasting furane resins core is cast the method for a plurality of elongated hole, and it is characterized in that: it comprises the steps:
A. the preparation of coremaking: according to the diameter and the length of core, but in molding sand, add the materials A and the B of the high-temperature gasification of different proportion during coremaking, be mixed uniformly, manufactured size, the uniform arbor of material, prepare special-purpose filling, consolidation instrument;
B. moulding, coremaking: arbor is put into the centre of core, use special-purposely fill, the consolidation instrument will mix the core sand that makes and successively insert core box and carry out consolidation, treat that core sclerosis back takes out core from core box, the brushing cast paint is stand-by;
C. mould assembling, cast: check whether the elongated hole core has crackle, then the elongated hole core is assembled with fixture and fix the conventional method of its mould assembling and cast employing iron casting production.
D. cleaning.
Above-mentioned elongated hole core is realized from cooling by volatizable material;
But the materials A of above-mentioned high-temperature gasification and B are respectively liquid and resin polycondensation reaction promoter, the weight percentage 1%~8% of A wherein, and the weight percentage of B is 0.3~4%;
Above-mentioned arbor is with core carbon steel;
Above-mentioned fuse one end will be designed to and can freely stretch.
Look the core of different-diameter, length during the production of coremaking of the present invention is prepared, but when coremaking, in molding sand, add the materials A and the B of the high-temperature gasification of different proportion, be mixed uniformly; Manufacture size, the uniform arbor of material, prepared special-purpose filling, consolidation instrument.
In the coremaking process, arbor is put into the centre of core, use special-purposely fill, the consolidation instrument will mix the core sand that makes and successively insert core box and carry out consolidation.Treat from core box, to take out core after the core sclerosis.The brushing cast paint is stand-by.
Check when mould assembling whether the elongated hole core has crackle, then the elongated hole core assembled and fix that fixture can be used as the air-out apparatus use.Core axially will leave line expansion extendable room.
When cast, to guarantee that giving vent to anger of each core is smoothly.

Claims (4)

1. a large thick-wall ironcasting furane resins core is cast the method for a plurality of elongated hole, and it is characterized in that: it comprises the steps:
A. the preparation of coremaking: according to the diameter and the length of core, but in molding sand, add the materials A and the B of the high-temperature gasification of different proportion during coremaking, be mixed uniformly, manufactured size, the uniform arbor of material, prepare special-purpose filling, consolidation instrument;
B. moulding, coremaking: arbor is put into the centre of core, use special-purposely fill, the consolidation instrument will mix the core sand that makes and successively insert core box and carry out consolidation, treat that core sclerosis back takes out core from core box, the brushing cast paint is stand-by;
C. mould assembling, cast: check whether the elongated hole core has crackle, then the elongated hole core is assembled with fixture and fix the conventional method of its mould assembling and cast employing iron casting production;
D. cleaning.
2. a kind of large thick-wall ironcasting furane resins core as claimed in claim 1 is cast the method for a plurality of elongated hole, it is characterized in that: but the materials A of described high-temperature gasification and B are respectively liquid resin and resin polycondensation reaction promoter, the weight percentage 1%~8% of A wherein, the weight of B is 0.3~4%.
3. a kind of large thick-wall ironcasting furane resins core as claimed in claim 1 is cast the method for a plurality of elongated hole, it is characterized in that: described arbor is with core carbon steel.
4. a kind of large thick-wall ironcasting furane resins core as claimed in claim 1 is cast the method for a plurality of elongated hole, it is characterized in that: an end of described fuse can freely stretch.
CNA2008102338411A 2008-12-26 2008-12-26 Method for casting multiple elongated holes on large-sized thick-wall iron casting with furan bonded sand core Pending CN101439400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008102338411A CN101439400A (en) 2008-12-26 2008-12-26 Method for casting multiple elongated holes on large-sized thick-wall iron casting with furan bonded sand core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008102338411A CN101439400A (en) 2008-12-26 2008-12-26 Method for casting multiple elongated holes on large-sized thick-wall iron casting with furan bonded sand core

Publications (1)

Publication Number Publication Date
CN101439400A true CN101439400A (en) 2009-05-27

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103752767A (en) * 2013-12-18 2014-04-30 桐乡合德机械有限公司 Shaping structure and manufacturing process of casting elongated hole sand core
CN105149518A (en) * 2015-10-14 2015-12-16 河北天宇高科冶金铸造有限公司 Sand core and method for casting molding of deep holes with same
CN103834828B (en) * 2012-11-27 2017-06-16 沈阳工业大学 A kind of controllable through hole zinc and kirsite porous material preparation method
CN108555243A (en) * 2018-04-08 2018-09-21 江苏宏德特种部件股份有限公司 A kind of preparation method and applications of main shaft class arbor structure
CN109746646A (en) * 2019-03-18 2019-05-14 苏州瑞森硬质合金有限公司 A kind of alloy rod production process containing deep hole
CN110252940A (en) * 2019-07-05 2019-09-20 宁波永祥铸造有限公司 A kind of casting core material and core-making method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103834828B (en) * 2012-11-27 2017-06-16 沈阳工业大学 A kind of controllable through hole zinc and kirsite porous material preparation method
CN103752767A (en) * 2013-12-18 2014-04-30 桐乡合德机械有限公司 Shaping structure and manufacturing process of casting elongated hole sand core
CN103752767B (en) * 2013-12-18 2016-06-22 桐乡合德机械有限公司 Foundry goods Elongated hole sand core molding structure and manufacturing process
CN105149518A (en) * 2015-10-14 2015-12-16 河北天宇高科冶金铸造有限公司 Sand core and method for casting molding of deep holes with same
CN108555243A (en) * 2018-04-08 2018-09-21 江苏宏德特种部件股份有限公司 A kind of preparation method and applications of main shaft class arbor structure
CN109746646A (en) * 2019-03-18 2019-05-14 苏州瑞森硬质合金有限公司 A kind of alloy rod production process containing deep hole
CN110252940A (en) * 2019-07-05 2019-09-20 宁波永祥铸造有限公司 A kind of casting core material and core-making method

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Open date: 20090527