CN1721103A - Molding sand adhesive for casting - Google Patents

Molding sand adhesive for casting Download PDF

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Publication number
CN1721103A
CN1721103A CN 200410035418 CN200410035418A CN1721103A CN 1721103 A CN1721103 A CN 1721103A CN 200410035418 CN200410035418 CN 200410035418 CN 200410035418 A CN200410035418 A CN 200410035418A CN 1721103 A CN1721103 A CN 1721103A
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China
Prior art keywords
waterglass
agent
sand
molding sand
present
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Pending
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CN 200410035418
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Chinese (zh)
Inventor
王继启
宁强
张红
张龙
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王继启
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Priority to CN 200410035418 priority Critical patent/CN1721103A/en
Publication of CN1721103A publication Critical patent/CN1721103A/en
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Abstract

Sand sticking collapse agent for casting comprises raw material of weight per cent: soluble glass 94.5-98%, dextrose powder 1.5-2.5%, light calcium carbonate powder 0.2-2%, suspending agent 0.2-0.5% and antiseptic 0.1-0.5%. It succeeds to integrate aforementioned raw material, has good high temperature collapsibility and anti-sticking ability, can fit to multiple hardening ways, cut baking time for CO2 and can increase recovery rate for used sand.

Description

The sticking agent of bursting of moulding sand for casting
Technical field
The present invention relates to a kind of casting industry molding sand with having the routed agent of gluing of bonding and defeated and dispersed effect.
Background technology
Sodium silicate sand, clay-beaded sand, resin bonded sand are domestic three Large Sand types.These three kinds different molding sand compare, and the clay-beaded sand dust pollution is serious, and operating environment is poor; The resin sand chemical contamination is obvious, and cost is too high.Comprehensively weigh from environmental angle and economic angle, sodium silicate sand is the binding agent that is hopeful to realize green casting most, and it is nontoxic, do not have and smell, and environment is good, and the extensive scope of application is arranged, and because of it has deformability preferably, type, core intensity height are particularly suitable for the production of steel-casting.But it has fatal weakness: collapsibility is poor, causes the discarded of a large amount of types, core sand in the production.Many founder authors have done huge effort, have obtained suitable achievement, the application of having put into production of many defeated and dispersed dose, modifier, and collapsibility improves.Simultaneously many new problems have also been produced, as type, the decline of core intensity, bad adaptability, unstable product quality.Chinese patent application numbers 90102788 discloses a kind of disperser for water-glass sand, has only introduced organic defeated and dispersed dose in waterglass, can't solve the homogeneity question of high temperature collapsibility and defeated and dispersed dose effectively.
Summary of the invention
Technical problem to be solved by this invention provides the sticking agent of bursting of a kind of moulding sand for casting, and the high temperature collapsibility is good, makes the wet adhesion of molding sand strong, and dry bond strength is good.
The sticking agent of bursting of moulding sand for casting of the present invention is characterized in that being made up of the raw material of following percetage by weight: waterglass 94.5-98%, powdered glucose 1.5-2.5%, precipitated calcium carbonate powder 0.2-2%, suspending agent 0.2-0.5%, anticorrisive agent 0.1-0.5%.
The present invention is main component with waterglass, has introduced organic defeated and dispersed dose and inorganic defeated and dispersed dose simultaneously, and suspending agent has solved the difficult problem of inorganic defeated and dispersed dose of easy sinking layering, and anticorrisive agent has mainly solved organic defeated and dispersed dose perishable problem.Suspending agent can select for use sodium phosphate trimer, calgon, bentonite or molecular weight to be lower than 3,000,000 known products such as polyacrylamide, preferred sodium phosphate trimer; Anticorrisive agent can be selected known products such as borax, sodium sulfite or Sodium Benzoate for use, preferred borax.It is 2.15-2.30 that waterglass preferably adopts modulus M, and density is 1.45-1.47g/cm 3Product.
The sticking preparation method who bursts agent of the present invention is, each raw material is mixed in emulsifying tank, and mulser high-speed stirred 1h gets final product under the normal temperature.
The sticking use amount of agent in foundry sand of bursting of the present invention is: in weight ratio, and foundry sand: sticking agent=100: the 6-8 that bursts.
Below relatively explain preparating mechanism of the present invention and characteristics:
(1) organic defeated and dispersed dose of glucose increases routed mechanism
Introduce organic defeated and dispersed dose of glucose, make in its water that is dissolved in waterglass rapidly, form even mucus, when the molding sand temperature arrives 600 ℃, glucose decomposes fully, make the waterglass sintered membrane many holes occur, destroyed the integrality of waterglass sintered membrane, thereby improved the collapsibility of molding sand<800 ℃.When the molding sand temperature reached 800 ℃, liquid phase just appearred in the waterglass sintered membrane, made the most disappearance in hole, so introduce organic defeated and dispersed dose of glucose, main effect is obviously to have improved 800 ℃ of collapsibilities in the past of molding sand.
(2) inorganic defeated and dispersed dose of precipitated calcium carbonate increases routed mechanism
The main composition of precipitated calcium carbonate is CaCO 3, content 〉=98%, introduce inorganic defeated and dispersed dose of precipitated calcium carbonate after, when molding sand temperature 〉=850 ℃, CaCO 3Just be decomposed into CaO and CO 2Gas is borrowed CaCO 3Pyrolytic and the phase change expansion of CaO, make the waterglass sintered membrane crackle or formation embrittlement film occur, thereby reduced the retained strength of 800~1100 ℃ of molding sand, in other words, inorganic defeated and dispersed dose of precipitated calcium carbonate significantly improved the molding sand temperature and reached 800~1100 ℃ collapsibility.Owing to adopted the appropriate and usefulness of organic defeated and dispersed dose of glucose and inorganic defeated and dispersed dose of precipitated calcium carbonate, significantly improved the collapsibility of cast cooling back type, core sand.Precipitated calcium carbonate the present invention preferably adopts superfine powder, and its granularity is the 3000-5000 order.
(3) improve molding sand dry strength mechanism
1, the present invention is main stick with waterglass.The organic defeated and dispersed dose of glucose of selecting for use itself also is a kind of good organic bond (and soluble in water).Glucose has obviously been brought into play the effect of coadhesive.
2, the anticorrisive agent borax introduced of the present invention, with the waterglass compatibility in also be a kind of adhesion promoter, it has promoted the raising of waterglass oneself viscosity.
3, the present invention is because coadhesive, the introducing of adhesion promoter, improved the adhesion strength of waterglass self on the one hand by adhesion promoter, the adhesion strength of additionally having replenished molding sand by coadhesive on the other hand, so that the dry strength of molding sand be significantly improved, compare with single waterglass, the molding sand dry strength has improved 30%.
(4) rationally utilize original moisture content of waterglass, do not add water in addition
With the existing moisture content in the waterglass organic defeated and dispersed dose of glucose, suspending agent and anticorrisive agent are dissolved rapidly in the technology, form homogeneous solution.Promptly increase the sticking agent of bursting in the cohesive force of molding sand hygrometric state, avoided adding in addition the shortcoming that solution easy layering and waterglass density reduce behind the water again.
(5) after inorganic defeated and dispersed dose of precipitated calcium carbonate superfine powder introduced, brought the long-term sinkage of placing of inorganic fine powder.After selecting 3000~5000 purpose superfine light calcium carbonates for use certain effect is arranged, effect is obvious behind the introducing suspending agent sodium phosphate trimer.Effect is desirable more after adopting mulser to operate, and the present invention has preferably taked following measure in the difficult problem of easy sinking layering after the inorganic defeated and dispersed dose of precipitated calcium carbonate of solution introduced:
1, having selected for use 3000~5000 purpose precipitated calcium carbonate superfine powders to reduce sinks.
2, utilize self viscosity of waterglass, stop to sink.
3, introducing suspending agent delays.
4, employing mulser operation (rotating speed: 2000~3000r/min), make inorganic defeated and dispersed dose of particle be the mesocolloid state.
Advantage of the present invention:
(1) favorable environment protection being arranged, is the green hope of casting.
1, this product is originally as uniform liquid nontoxic, free from extraneous odour.Product does not have waste gas, no waste water, no waste residue in the overall process of producing.
2, the user can significantly improve the old sand reclamation rate in using.The old sand reclamation rate is 50~70%, and the discharge capacity of old sand (waste residue) has reduced 50~70%.
3, during the user used, working space removed CO 2Blow a small amount of CO that brings firmly 2Outside the residual air, do not have other any new poisonous, pernicious gas and produce.Obviously reduced simultaneously CO 2Residual air concentration is because of CO 2Can reduce CO in the sclerosis 2Consumption 50%.
(2) good collapsibility is arranged
The present invention has developed the advantage of waterglass, has overcome the deadly defect of waterglass collapsibility performance difference.Because significantly improving of collapsibility shortened the clear mould time, improved clear die worker and made environment, the more important thing is and improved the old sand reclamation rate.
(3) sand mold dry strength height, the wet cohesive force of molding sand is strong
Use product of the present invention, molding sand increases by 30% than waterglass intensity after hardening to whole intensity, and can adapt to different shape, the needs of various sizes type, core.
Because organic defeated and dispersed dose and inorganic defeated and dispersed dose introducing, increased the collapsibility behind hygrometric state cohesive force, molding sand dry strength and the molding sand high temperature of molding sand.
(4) adapt to multiple sclerosis mode
Product of the present invention can adapt to multiple sclerosis mode (as oven dry sclerosis, CO 2Sclerosis, ester sclerosis, inorganic salts sclerosis, microwave heating, vacuum displacement sclerosis etc.).At CO 2Can reduce CO in the sclerosis 2More than 50%, shorten firm time 50%.
(5) shortened CO 2Drying time after the sclerosis.
Product of the present invention can make CO 2Drying time after the sclerosis shortens 30~60%.
(6) excellent anti-scab ability is arranged.
The wet cohesive force of product molding sand of the present invention is strong, makes molding sand in conjunction with tightr, has effectively stoped the infiltration of molten steel, and scab phenomenon is greatly alleviated.
(7) easy to operate
Product of the present invention successfully becomes adhesive (waterglass), organic defeated and dispersed dose (powdered glucose), inorganic defeated and dispersed dose (precipitated calcium carbonate superfine powder), suspending agent (sodium phosphate trimer), anticorrisive agent (borax) integrated, use, easy to operate.
It below is the effect comparison of product of the present invention and single waterglass.
The at present domestic exhausted big Foundry Works of counting still uses single waterglass to make adhesive.Product of the present invention belongs to modified water glass type of new generation, and it is good to possess molding sand hygrometric state cohesive force, CO 2Blow hard and low temperature drying after the dry strength height, only kept appropriate retained strength during high temperature, the molding sand collapsibility is good, the casting quality height.As follows with the molding sand effect comparison that product of the present invention and single waterglass are manufactured:
Sequence number Content Effect
1 Wet cohesive force of molding sand and lubricity Product of the present invention is significantly better than single waterglass
2 Molding sand dry strength (whole intensity) Product of the present invention has improved 30% than single waterglass
3 CO 2Firm time Product of the present invention has shortened 50% than single waterglass
4 CO 2Consumption Product of the present invention has been saved more than 50% than single waterglass.
5 The low temperature drying time Product of the present invention has shortened 30~60% than single waterglass.
6 Molding sand collapsibility behind the high temperature (800-1100 ℃) Collapsibility is good behind the product molding sand high temperature of the present invention, and clear mould is easy.Collapsibility is poor after having overcome single sodium silicate sand high temperature, the deadly defect of clear mould difficulty.
7 The clear mould time Product of the present invention has shortened 50~70% than single waterglass.
8 The old sand reclamation rate Product of the present invention has improved 50~70% than single waterglass.
9 Old sand (waste residue) discharge capacity Product of the present invention has reduced by 50~70% than single waterglass.
10 Anti-foundry goods scab ability Product of the present invention has excellent anti-scab ability, significantly better than single waterglass.
11 The cast(ing) surface brightness Product of the present invention obviously is better than single waterglass.
12 In the use temperature, humidity are changed adaptability Product of the present invention is significantly better than single waterglass, and product of the present invention is subjected to temperature, humidity effect very little, all can bring into play its good function in any environment.Single waterglass is strong to temperature, moisture sensitivity, and with the change of environmental condition, partly service index need be adjusted accordingly.
The specific embodiment
The used raw material quality of following examples is:
Sequence number Material name Quality requirement
1 Waterglass (inorganic bond) (1) modulus: M=2.15~2.30 (2) density: (g/cm 3)D=1.45~1.47
2 Organic defeated and dispersed dose Weight content %: 〉=95%
3 Inorganic defeated and dispersed dose Order number: 3000~5000
4 Suspending agent Weight content %: 〉=95%
5 Anticorrisive agent Weight content %: 〉=95%
Embodiment one:
Waterglass 96%, powdered glucose 2%, precipitated calcium carbonate powder 1%, sodium phosphate trimer 0.5%, borax 0.5%.
Embodiment two:
Waterglass 94.5%, powdered glucose 2.5%, precipitated calcium carbonate powder 2%, sodium phosphate trimer 0.5%, borax 0.5%.
Embodiment three:
Waterglass 98%, powdered glucose 1.5%, precipitated calcium carbonate powder 0.2%, sodium phosphate trimer 0.2%, borax 0.1%.
Embodiment four:
Waterglass 96%, powdered glucose 2%, precipitated calcium carbonate powder 1.5%, calgon 0.3%, Sodium Benzoate 0.2%.
Embodiment five:
Waterglass 96%, powdered glucose 2%, precipitated calcium carbonate powder 1.5%, sodium phosphate trimer 0.3%, sodium sulfite 0.2%.
Embodiment six:
Waterglass 98%, powdered glucose 1.5%, precipitated calcium carbonate powder 0.2%, bentonite 0.2%, borax 0.1%.

Claims (7)

1, the sticking agent of bursting of moulding sand for casting is characterized in that being made up of the raw material of following percetage by weight: waterglass 94.5-98%, powdered glucose 1.5-2.5%, precipitated calcium carbonate powder 0.2-2%, suspending agent 0.2-0.5%, anticorrisive agent 0.1-0.5%.
2, the sticking agent of bursting according to claim 1 is characterized in that described suspending agent is that sodium phosphate trimer, calgon, bentonite or molecular weight are lower than 3,000,000 polyacrylamide.
3, the sticking agent of bursting according to claim 2 is characterized in that described suspending agent is a sodium phosphate trimer.
4, the sticking agent of bursting according to claim 1 is characterized in that described anticorrisive agent is borax, sodium sulfite or Sodium Benzoate.
5, the sticking agent of bursting according to claim 4 is characterized in that described anticorrisive agent is a borax.
6, the sticking agent of bursting according to claim 1, the modulus M that it is characterized in that described waterglass is 2.15-2.30, density is 1.45-1.47g/cm 3
7, the sticking agent of bursting according to claim 1, the granularity that it is characterized in that described precipitated calcium carbonate powder is the 3000-5000 order.
CN 200410035418 2004-07-17 2004-07-17 Molding sand adhesive for casting Pending CN1721103A (en)

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Application Number Priority Date Filing Date Title
CN 200410035418 CN1721103A (en) 2004-07-17 2004-07-17 Molding sand adhesive for casting

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Application Number Priority Date Filing Date Title
CN 200410035418 CN1721103A (en) 2004-07-17 2004-07-17 Molding sand adhesive for casting

Publications (1)

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CN1721103A true CN1721103A (en) 2006-01-18

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101323008B (en) * 2007-06-12 2012-11-21 米纳克有限公司 Moulding material mixture, moulded blank for moulding purposes and method for producing a moulded blank
CN101444823B (en) * 2008-12-26 2013-08-21 济南圣泉集团股份有限公司 Caking agent
CN103495693A (en) * 2013-10-16 2014-01-08 合肥市田源精铸有限公司 High-temperature-resisting easy collapse molding sand and preparation method thereof
CN104139154A (en) * 2014-07-30 2014-11-12 吴江市液铸液压件铸造有限公司 Phenolic resin self-hardening sand and preparation method thereof
DE102014221237A1 (en) 2013-10-19 2015-04-23 Peak Deutschland Gmbh Process for producing lost cores or moldings for casting production
CN106925717A (en) * 2017-04-28 2017-07-07 三门峡阳光铸材有限公司 Founding materials inorganic binder
CN109014020A (en) * 2018-07-02 2018-12-18 四川顺宇铸造有限公司 A kind of casting moulding sand hardening agent and production application process
CN109175217A (en) * 2018-11-14 2019-01-11 李新忠 A kind of cast glass sand and preparation method thereof
CN110653331A (en) * 2019-09-29 2020-01-07 佛山市高明利钢精密铸造有限公司 Preparation method of molding sand binder for casting
CN110666096A (en) * 2019-09-29 2020-01-10 含山县能华铸造有限公司 Method for preparing casting molding sand with good collapsibility
CN114472796A (en) * 2022-01-21 2022-05-13 中国第一汽车股份有限公司 Modified inorganic binder sand with collapsibility and preparation method thereof

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101323008B (en) * 2007-06-12 2012-11-21 米纳克有限公司 Moulding material mixture, moulded blank for moulding purposes and method for producing a moulded blank
CN101444823B (en) * 2008-12-26 2013-08-21 济南圣泉集团股份有限公司 Caking agent
CN103495693A (en) * 2013-10-16 2014-01-08 合肥市田源精铸有限公司 High-temperature-resisting easy collapse molding sand and preparation method thereof
US10092947B2 (en) 2013-10-19 2018-10-09 Peak Deutschland Gmbh Method for producing lost cores or molded parts for the production of cast parts
DE102014221237A1 (en) 2013-10-19 2015-04-23 Peak Deutschland Gmbh Process for producing lost cores or moldings for casting production
CN104139154A (en) * 2014-07-30 2014-11-12 吴江市液铸液压件铸造有限公司 Phenolic resin self-hardening sand and preparation method thereof
CN106925717A (en) * 2017-04-28 2017-07-07 三门峡阳光铸材有限公司 Founding materials inorganic binder
CN109014020A (en) * 2018-07-02 2018-12-18 四川顺宇铸造有限公司 A kind of casting moulding sand hardening agent and production application process
CN109175217A (en) * 2018-11-14 2019-01-11 李新忠 A kind of cast glass sand and preparation method thereof
CN109175217B (en) * 2018-11-14 2021-04-23 李新忠 Casting glass sand and preparation method thereof
CN110653331A (en) * 2019-09-29 2020-01-07 佛山市高明利钢精密铸造有限公司 Preparation method of molding sand binder for casting
CN110666096A (en) * 2019-09-29 2020-01-10 含山县能华铸造有限公司 Method for preparing casting molding sand with good collapsibility
CN110666096B (en) * 2019-09-29 2020-10-30 含山县能华铸造有限公司 Method for preparing casting molding sand with good collapsibility
CN114472796A (en) * 2022-01-21 2022-05-13 中国第一汽车股份有限公司 Modified inorganic binder sand with collapsibility and preparation method thereof

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