CN101992258B - Composite foundry sand material for preventing foundry sand sintering in steel cast casting and preparation method thereof - Google Patents
Composite foundry sand material for preventing foundry sand sintering in steel cast casting and preparation method thereof Download PDFInfo
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- CN101992258B CN101992258B CN201010584066.1A CN201010584066A CN101992258B CN 101992258 B CN101992258 B CN 101992258B CN 201010584066 A CN201010584066 A CN 201010584066A CN 101992258 B CN101992258 B CN 101992258B
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Abstract
The invention relates to a composite foundry sand material for preventing foundry sand sintering in steel cast casting and a preparation method thereof. After the material is casted and calcined at high temperature, the foundry sand of the material is of a scrobiculate loose structure, instead of a hard agglomerated cake, and the composite foundry sand material comprises the following components in percentage by weight: 40-65% of quartz sand, 35-60% of 70 sand and 1-1.2% of furane resin, and a curing agent accounts for 30-50% of furane resin. The composite foundry sand material has the advantages that after being casted and calcined, the composite foundry sand forms the scrobiculate loose structure, thereby damaging a quartz sand foundry sand sintered structure, generating no large agglomerated block, being easy for cleaning, greatly improving labor productivity and reducing production cost; in addition, the production materials (quartz sand and 70 sand) have low cost and wide sources; moreover, by using the composite foundry sand material, cracks, misrun and other secondary flaws caused by cleaning can be reduced, therefore, the quality of casts is improved.
Description
Technical field
The present invention relates to can prevent in a kind of casting steel casting composite sand material and the preparation method of molding sand sintering, this material is after cast high-temperature calcination, its molding sand forms honeycomb loose structure and does not form hard agglomerate, and the casting technique that belongs to casting production is manufactured field.
Background technology
(comprise furane resins in quartzy air-set mold sand casting at present, phenolic resins, waterglass alicyclic organic quartz air-set mold sand) produce, the solution of the quartz sand molding sand sintering that large-scale steel-casting is not freely produced because of reasons in structure heat radiation is conventionally at part use chrome ore, zirconium ore sand, the special sand such as mound sand and forsterite sand, special sand has certain heat storage function and the relative higher refractoriness of quartz sand, overheated to local molding sand is not the too serious effect that can play the anti-sintering of anti-scab, but wall thickness is exceeded to refractoriness in the same old way sintering compared with dark elongated position because of high-temperature special sand compared with thick or mud core, and sand removal is more difficult, and not only resource scarcity of special sand, expensive, worker labour productivity is low, working condition is severe.For this reason, need a kind of production cost low in large-scale steel-casting Foundry Production, raw material is easy to get, the solution that labor productivity is high.
Summary of the invention
Purpose of design: avoid the weak point in background technology, design a kind of molding sand after cast high-temperature calcination, its molding sand forms honeycomb loose structure and does not form hard agglomerate, a kind of composite sand material and preparation method that can prevent molding sand sand sintering in Foundry Production.
Design: no matter be all local entirety caking and hard owing to using molding sand after single quartz sand or single special sand sintering, therefore design of the present invention is to use the composite sand material that quartz sand is base, allow the part of casting mold molding sand easy-sintering become honey comb structure, destroy the structure (seeing accompanying drawing 1) of its agglomerate.So just can make workman's sand removal easy, raise labour productivity, also require lower cost for material, easy to operate, also can be called honeycomb method.The selection of material of the present invention for this reason: select the mixed sand of quartz sand and 70 sand as composite sand material, this is because single quartz sand does molding sand in the unfavorable one side that lives through existing generation sintering after saturated high temperature (conventionally more than 1350 DEG C), also have high temperature casting mold cavity dimension change little, the feature that surface quality of continuous castings is good; Living through after saturated high temperature, not producing sintering and do molding sand with single 70 sand (lime stone), sand removal is easy, and it is quick lime CaO and gas CO2 that 70 sand just start calcining and decomposing above at 700 DEG C, and quick lime is powder, there is not Sintering Problem, and be the endothermic reaction; 70 sand (lime stone) fast decoupled absorb a large amount of heat energy and play the effect of Quench in the time reaching more than 900 DEG C, also can produce shrink mark simultaneously, and pore, earthworm are split, casting mold cavity dimension changes greatly and the shortcoming such as cast(ing) surface is poor.Bi-material can be learnt from other's strong points to offset one's weaknesses, and this molding sand had both had the heat absorption function of the special sand such as chrome ore, also can meet the requirement of part surface quality of continuous castings, meets choice requirement.For this reason, select the skeleton of quartz sand as honeycomb, become empty material using 70 sand as honeycomb, reach the object of destroying quartz sand molding sand sintering entirety caking.And it is low also to meet production cost, the principle that raw material is easy to get.
Technical scheme: this composite sand material, roughing sand is taking quartz sand as example, and its percentage by weight is: quartz sand 40～65%, 70 sand 35～60%.Taking furane resins as binding agent, when benzene sulfonic acid is curing agent, binding agent, curing agent addition percentage are constant, because curing agent (benzene sulfonic acid) is acid material, after adding 70 sand in roughing sand, sour consumption value can significantly increase, and addition can suitably increase, and sand mulling craft also must be adjusted; When binding agent is the materials such as phenolic resins, waterglass, because curing agent is nonacid material, therefore sand mulling craft can be constant.
Sand mulling craft scheme to furan resin self curing sand is as follows: scheme (1): quartz sand is mixed with curing agent and mixed for 2 ~ 3 minutes, after then adding furane resins mixing to mix for 2 ~ 3 minutes, then shake out after adding 70 sand mixing to mix for 2 ~ 4 minutes.Scheme (2): quartz sand is mixed with curing agent 2 ~ 3 minutes, 70 sand are mixed with furane resins and mixed for 2 ~ 3 minutes simultaneously, and then shake out after two kinds of sand are mixed together to 2 ~ 3 minutes.This molding sand in Foundry Production after cast high-temperature calcination its molding sand form honeycomb loose structure.
The present invention compared with background technology, the one, this composite sand material forms honey comb structure after high-temperature calcination, destroys quartz sand molding sand sintering structure, can not produce bulk sintering, sand removal is easy, significantly raises labour productivity, and reduces production costs; The 2nd, produce material (quartz sand and 70 sand) cost low, abundant raw material; The 3rd, reduce the secondary defect producing because of sand removal as crackle, misrun etc., improve casting quality.
Brief description of the drawings
Fig. 1 is the structural representation of composite sand material, and in its figure, black is quartz sand, and white is 70 sand.The composite sand material of quartz sand and 70 sand forms honey comb structure after high-temperature calcination cannot form hard agglomerate, is conducive to sand removal.
Detailed description of the invention
Embodiment 1: a kind of composite sand material that can prevent molding sand sintering in Foundry Production, its percentage by weight is: quartz sand 40%, 70 sand 60%, furane resins 1.2%, curing agent accounts for furane resins than 30 ~ 50%.Described curing agent is benzene sulfonic acid; Described quartz sand can adopt chrome ore, zirconium ore sand, mound sand, forsterite sand to substitute, and binding agent can substitute with other resin or waterglass.
Embodiment 1-1: on the basis of embodiment 1, quartz sand 45%, 70 sand 55%, furane resins 1.2%, curing agent accounts for furane resins than 50%.
Embodiment 1-2: on the basis of embodiment 1, quartz sand 50%, 70 sand 50%, furane resins 1.2%, curing agent accounts for furane resins than 50%.
Embodiment 1-3: on the basis of embodiment 1, quartz sand 55%, 70 sand 45%, furane resins 1.2%, curing agent accounts for furane resins than 50%.
Embodiment 1-4: on the basis of embodiment 1, quartz sand 60%, 70 sand 40%, furane resins 1.2%, curing agent accounts for furane resins than 50%.
Embodiment 1-1 ~ 1-4: with reference to accompanying drawing 1.A kind of method that can prevent molding sand sand sintering in Foundry Production, sand mulling craft: by quartz sand and curing agent mixing 2-3 minute, then add 1 ~ 1.2% furane resins mixing after 2-3 minute, then add 70 sand → mixing to shake out after 2-4 minute, sand mulling craft also can be implemented by scheme 2.This composite sand in Foundry Production after cast high-temperature calcination its molding sand form honeycomb loose structure.
It is to be understood that: although above-described embodiment is to the present invention's detailed text description of contrasting; but these text descriptions; just the simple text of mentality of designing of the present invention is described; instead of restriction to mentality of designing of the present invention; any combination, increase or amendment that does not exceed mentality of designing of the present invention, all falls within the scope of protection of the present invention.
Claims (2)
1. one kind can prevent the sand mulling craft of the composite sand material of molding sand sintering in Foundry Production, it is characterized in that composite sand material weight percentage is: quartz sand 40～65%, 70 sand 35～60%, furane resins 1 ~ 1.2%, curing agent accounts for furane resins than 30 ~ 50%, and curing agent is benzene sulfonic acid; The sand mulling craft of composite sand material:
Scheme (1): quartz sand is mixed with curing agent and mixed for 2～3 minutes, after then adding furane resins mixing to mix for 2～3 minutes, then shake out after adding 70 sand mixing to mix for 2～4 minutes;
Scheme (2): quartz sand is mixed with curing agent 2～3 minutes, 70 sand are mixed with furane resins and mixed for 2～3 minutes simultaneously, and then after two kinds of sand are mixed together to 2～3 minutes, shake out, this molding sand in Foundry Production after cast high-temperature calcination its molding sand form honeycomb loose structure.
2. the sand mulling craft of the composite sand material that can prevent molding sand sintering in Foundry Production according to claim 1, is characterized in that: described quartz sand adopts chrome ore, zirconium ore sand, mound sand, forsterite sand to substitute.
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| CN201010584066.1A CN101992258B (en) | 2010-12-13 | 2010-12-13 | Composite foundry sand material for preventing foundry sand sintering in steel cast casting and preparation method thereof |
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| CN201010584066.1A CN101992258B (en) | 2010-12-13 | 2010-12-13 | Composite foundry sand material for preventing foundry sand sintering in steel cast casting and preparation method thereof |
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| CN101992258A CN101992258A (en) | 2011-03-30 |
| CN101992258B true CN101992258B (en) | 2014-07-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212665A (en) * | 2013-05-09 | 2013-07-24 | 窦志超 | Artificial nice foundry sand, preparation method and application thereof |
| CN103570367A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | High fire-resistant molding sand for casting and preparation method thereof |
| CN104525842A (en) * | 2014-12-01 | 2015-04-22 | 繁昌县恒鑫汽车零部件有限公司 | Facing sand for casting of gray cast iron cylinder bodies and preparation method thereof |
| CN105127359A (en) * | 2015-08-19 | 2015-12-09 | 合肥市田源精铸有限公司 | High-thermal-stability sand |
| CN105312501A (en) * | 2015-11-02 | 2016-02-10 | 广西博白县三田机械制造有限公司 | Die casting method |
| CN105312485B (en) * | 2015-11-02 | 2018-02-02 | 广西博白县三田机械制造有限公司 | A kind of die casting molding sand |
| CN106311961B (en) * | 2016-10-31 | 2021-02-05 | 杭州微砂科技有限公司 | Sintering-resistant and sand-bonding-free furan resin molding sand material and manufacturing method thereof |
| CN111496177B (en) * | 2020-06-03 | 2022-02-25 | 中车戚墅堰机车车辆工艺研究所有限公司 | Furan resin self-hardening sand, manufacturing method thereof and casting sand mold |
| CN114273603A (en) * | 2021-12-10 | 2022-04-05 | 东华大学 | Mixed raw sand |
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| DE2040734A1 (en) * | 1970-08-17 | 1972-02-24 | Kraemer & Grebe Kg | Casting sand - contng hydrocarbon poly-condensate |
| EP0521469A1 (en) * | 1991-07-01 | 1993-01-07 | Toshiba Monofrax Company Ltd. | Casting mold |
| CN1394705A (en) * | 2002-06-23 | 2003-02-05 | 东风汽车公司 | Production method of resin sand core for investment casting |
| CN101439388A (en) * | 2008-12-18 | 2009-05-27 | 南通华东液压铸业有限公司 | Chromium iron resin mould sand and preparation thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1238131C (en) * | 2004-04-09 | 2006-01-25 | 四川德阳二重精细化工厂 | Nano level cementing material in use for foundry sand, preparation method and usage |
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- 2010-12-13 CN CN201010584066.1A patent/CN101992258B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2040734A1 (en) * | 1970-08-17 | 1972-02-24 | Kraemer & Grebe Kg | Casting sand - contng hydrocarbon poly-condensate |
| EP0521469A1 (en) * | 1991-07-01 | 1993-01-07 | Toshiba Monofrax Company Ltd. | Casting mold |
| CN1394705A (en) * | 2002-06-23 | 2003-02-05 | 东风汽车公司 | Production method of resin sand core for investment casting |
| CN101439388A (en) * | 2008-12-18 | 2009-05-27 | 南通华东液压铸业有限公司 | Chromium iron resin mould sand and preparation thereof |
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| CN101992258A (en) | 2011-03-30 |
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Inventor after: Zhang Hongzhuan Inventor after: Zhou Liming Inventor after: Dong Hongchao Inventor after: Tang Guojian Inventor after: Guo Jianming Inventor before: Zhang Hongzhuan Inventor before: Zhou Liming Inventor before: Dong Hongchao Inventor before: Tang Guojian Inventor before: Guo Jianming |
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Address after: 311106 No.2 Road, industrial block, Tangqi Town, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Steam Turbine Casting and Forging Co.,Ltd. Address before: 311106 No.2 Road, industrial block, Tangqi Town, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU STEAM TURBINE CASTING AND FORGING Co.,Ltd. |
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