CN102672794B - Composite sand mould forming process for producing casting fireproof materials - Google Patents

Composite sand mould forming process for producing casting fireproof materials Download PDF

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Publication number
CN102672794B
CN102672794B CN201210184410.7A CN201210184410A CN102672794B CN 102672794 B CN102672794 B CN 102672794B CN 201210184410 A CN201210184410 A CN 201210184410A CN 102672794 B CN102672794 B CN 102672794B
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China
Prior art keywords
sand mould
film
composite sand
incubator
composite
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CN201210184410.7A
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Chinese (zh)
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CN102672794A (en
Inventor
冯中起
龙希成
陈龙
张鑫
罗凯
罗峰
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瑞泰科技股份有限公司
都江堰瑞泰科技有限公司
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Priority to CN201210184410.7A priority Critical patent/CN102672794B/en
Publication of CN102672794A publication Critical patent/CN102672794A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/484Refractories by fusion casting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F7/00Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/107Refractories by fusion casting
    • C04B35/109Refractories by fusion casting containing zirconium oxide or zircon (ZrSiO4)
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/653Processes involving a melting step
    • C04B35/657Processes involving a melting step for manufacturing refractories
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C29/00Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/12Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on oxides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina

Abstract

The invention relates to a composite sand mould forming process for producing casting fireproof materials. The composite sand mould forming process includes steps of: mould preparing; laminating; mould vacuumizing; box containing; thermal insulation material filling; jolt ramming; vacuumizing of a thermal insulation box; pattern withdrawing; turning; feeder head placing; thermal insulation material filling on the periphery of a feeder head and the like. The composite sand mould forming process well solves the technical problems of easy box crush and crack of finished products caused by the fact that the negative pressure forming process is applied to the process of fireproof material casting. The composite sand mould manufactured by the composite sand mould forming process is applied to manufacturing of the casting fireproof materials, and the composite sand mould forming process is energy-saving and environment-friendly and improves appearance quality of the finished products.

Description

A kind of composite sand mould moulding process of producing castable refractory
Technical field
The invention belongs to the technical field of castable refractory, more particularly, the present invention relates to a kind of composite sand mould moulding process of producing castable refractory.
Background technology
Casting refractory material product is the important inner lining materials of glass industry melting furnaces, and the model of castable refractory production and application mainly contains 3 kinds of the quartz sand sand mo(u)ld of graphite mo(u)ld, resin-bonded and the quartz sand sand mo(u)lds of waterglass combination at present.The expensive difficulty of processing of graphite mo(u)ld is large; The quartz sand sand mo(u)ld of resin-bonded has at normal temperatures from hardware features, is easy to make overall sand mo(u)ld, and product appearance size precision is high, but this sand mold is with high content of technology, and cost is higher than waterglass; The quartz sand sand mo(u)ld easy manufacture with low content of technology of waterglass combination, cost are low, but its shortcoming is the poor dimensional precision of sand mo(u)ld, causes product allowance large, and presentation quality is poor.
At present, domestic castable refractory manufacturing enterprise generally adopts the quartz sand sand mold of waterglass combination, and this is also to cause China's casting refractory material product presentation quality is starkly lower than external product for a long time, the market competitiveness is starkly lower than one of key factor of external product.In addition, water-glass sand contains a large amount of vehicle substances, is difficult to be reproduced utilization, and sand mold is disposable use, will produce every year a large amount of industrial refuses, causes the wasting of resources and environmental pollution.
Negative pressure of vacuum moulding process is a kind of without binding agent, water and other additive, only with the sealing of dry sand, plastic sheeting, the technology of taking out negative pressure and carrying out moulding, possess casting dimension accurately, the advantage of the aspects such as clear-cut, energy-conserving and environment-protective, and this technique is cast boundary both at home and abroad and is described as " foundry engieering of 21st century " and " green revolution of foundary industry ".But the foundry engieering of the metal materials such as cast iron and castable refractory technology because the aspects such as material composition, temperature exist significant difference, thereby apply to castable refractory industry by negative pressure of vacuum moulding process and still have problems urgently to be resolved hurrily.
Patent of invention CN101143460 B discloses a kind of method of utilizing producing casting fireproof material by negative pressure hollow type.Publication number is the negative-pressure molding process that the patent application document of CN101823122A discloses a kind of casting refractory material product.But in above-mentioned founding refractory product technical process, exist technological process complexity, the easy easily defect of the aspect such as cracking of low, the goods of crush, efficiency.
Summary of the invention
In order to solve the above-mentioned technical problem existing in prior art, the object of the present invention is to provide a kind of composite sand mould moulding process of producing castable refractory, composite sand mould moulding process of the present invention has well solved vacuum forming process application easily technical barrier of cracking of existing easy crush, goods in founding fire proofed wood technique.
Composite sand mould rising head of the present invention adopts antivacuum moulding process, and body adopts vacuum forming technique to make.So, the characteristic of the aspect such as can bring into play rising head sand mold high-efficient simple, energy-conservation, high-temperature behavior is excellent, makes full use of again the advantage of the aspect such as environmental protection and energy saving, products appearance good quality of vacuum forming; And in the process of preparation, resinoid bond is blended in packing material in suitable ratio, give full play to the feature of resinoid bond air set, all can play a supporting role at normal temperature and high temperature to membranous wall, thereby can under lower vacuum pressure, implement casting, solve the easily technical barrier of cracking of the easy crush of vacuum forming technique, goods, and further improved the quality of goods.
To achieve these goals, the present invention has adopted following technical scheme:
Produce a composite sand mould moulding process for castable refractory, it is characterized in that described composite sand mould moulding process comprises the following steps: (1) is according to the shape fabricating die wall porous of goods and the model of hollow; (2) model of step (1) gained is placed on the template with vacuum suction chamber, and implement vacuum pumping on the outer surface that softening ethylene-vinyl acetate copolymer film is covered, described film is close on the die wall of described model, and in wherein said ethylene-vinyl acetate copolymer, the content of vinyl acetate is 25-35wt%; (3) model that is glued with described film step (2) being obtained is placed in the incubator with vacuum suction chamber, insert insulation material jolt ramming, implement the vacuum pumping of special-purpose thermal insulation case, upset special-purpose thermal insulation case also takes out model, place rebound and rising head, stay-warm case obtain described composite sand mould with dry sand filling rising head surrounding on cover, wherein said insulation material comprises furane resins or the phenolic resins of 0.1-5.0wt%, and the quartz sand of 95-99.9 wt% or alumina hollow ball.
Wherein, described rising head adopts the sand mould plate of heating resisting metal, resin-bonded, sand mould plate or the heat retaining and exothermal system of waterglass combination to become.
Wherein, described heat retaining and exothermal body can be for example the silica fibre that contains 2.2-3.5 wt%, the quartz sand of 72-85wt%, the aluminium powder of 2.5-5.0wt%, the di-iron trioxide of 2.5-6.0wt%, manganese dioxide, the furane resins of 0.8-1.5wt% and the phenolic resins of 0.6-1.5wt% of 1.2-2.5.
Wherein, described model refers to the model that adopts timber, resin or metal die wall porous and hollow.Further preferably, described model refers to and adopts the die wall porous made of aluminum or aluminum alloy and the model of hollow.
Wherein, described ethylene-vinyl acetate copolymer film softens by being heated to 60-79 ℃.
Wherein, described insulation material comprises the phenolic resins of 1.8wt%, the stearic acid of 1.2wt%, dimethicone, the acrylic acid modified rosin of 1.2wt% and the quartz sand of surplus of 1.5wt%.
Wherein, in step (2) and step (3), described vacuum pumping refers to the pressure in described model is evacuated to 0.01-0.038 MPa.
Compared with prior art, the present invention has following beneficial effect:
1. the notch portion of emitting of goods does not need to vacuumize, and can realize the tender batch making of air set and same specification, has improved production efficiency.2. of the present invention vacuumizing can just can meet the needs of production under lower pressure, and the time of the pressurize of simultaneously casting also shortens greatly, thereby is conducive to save the energy, and rising head material selects heat retaining and exothermal body to can save energy more than 30% on selecting in addition.3. the employing of composite sand mould technique can guarantee the normal temperature strength of composite sand mould, can guarantee again the high temperature casting case that do not collapse, and has effectively guaranteed the superiority of products appearance and inherent quality.
Accompanying drawing explanation
Fig. 1: the vacuum forming part-structure profile described in specific embodiment of the present invention;
Fig. 2: the composite sand mould section of structure described in specific embodiment of the present invention;
In figure, the represented implication of each Reference numeral is respectively: 1-model, 2-vacuum suction chamber, 3-film, 4-passage, 5-incubator, 6-insulation material, 7-rebound, 8-rising head, 9-stay-warm case, 10-dry sand, 11-connector, 12-model passage.
The specific embodiment
Below with reference to the drawings and specific embodiments, technical scheme of the present invention is described further.
embodiment 1:
The present embodiment is exemplarily set forth the composite sand mould of producing casting zirconia corundum goods 250 × 400 × 1200mm.Shown in accompanying drawing 1-2, described composite sand mould is prepared by following steps:
Rising head 8 adopts heat retaining and exothermal system to make template (manganese dioxide, the furane resins of 0.8-1.5wt% and the phenolic resins of 0.6-1.5wt% of the aluminium powder of the silica fibre that contains 2.2-3.5 wt%, the quartz sand of 72-85wt%, 2.5-5.0wt%, the di-iron trioxide of 2.5-6.0wt%, 1.2-2.5), according to the drawing shape of technique initialization, by thick 400 (height) × 400 × 40mm() (2) and 400 (height) × 250 × 40 mm(thick) (2) heat retaining and exothermal body plate, adopt fastening being bolted together of steel wire of diameter 2mm.
To make vacuum forming model 1(appearance and size 250 × 400 × 1200 mm of hollow according to article shape) (adopt metal pattern, for example aluminum or aluminum alloy model), be connected with vacuum suction chamber 2, and by adopt softening heater to eva film 3(vinyl acetate content at the EVA of 32wt% plastic sheeting) soften, be covered in the outer surface of model 1, the passage 4 being connected with model 1 by vacuum suction chamber 2 and model passage 12 are taken the air in special purpose model 1 and between film special 3 and special purpose model 1 away, model internal pressure is controlled at 0.035 MPa, softening eva film 3 can be adjacent on model 1 outer surface,
The model 1 that is glued with eva film 3 is placed in vacuum forming incubator 5, and by insulation material 6(granularity at 50 orders, the furane resins of 0.1-5.0wt% or phenolic resins, and the quartz sand of 95-99.9 wt% or alumina hollow ball) insert in incubator 5, carry out jolt ramming operation, to guarantee that insulation material 6 can close contact eva film 3;
Start vavuum pump, by connector 11, incubator 5 is carried out to vacuum pumping, make 5 casees interior negative pressure (pressure is controlled at 0.038MPa) that form of incubator, further sclerosis eva film 3, and discharge the vacuum state in special purpose model 1, keep the negative pressure state of part between incubator 5 and film special 3, model 1 is taken out.
Upset is with the incubator 5 of eva film 3, and the heat retaining and exothermal body rising head 8 of placing rebound 7 and making, and place stay-warm case 9 and with dry sand 10 filling rising head 8 surroundings can obtain the composite sand mould described in the present embodiment.
embodiment 2:
The present embodiment is exemplarily set forth the composite sand mould of producing casting zirconia corundum goods 250 × 400 × 1200mm, and shown in accompanying drawing 1-2, described composite sand mould is prepared by following steps:
Rising head 8 adopts resin bonded sand mould rising head 8(furane resins 3wt%, quartz sand 97wt%),, according to the drawing shape of technique initialization, be that 600(is high by rising head 8 interior shapes that adopt resin bonded sand mould to make) × 400 × 250mm, rising head 8 surrounding wall thickness are 30mm.
Vacuum forming model 1(appearance and size 250 × 400 × 1200 mm of hollow will be made according to article shape), be connected with vacuum suction chamber 2, and by adopt softening heater to eva film 3(vinyl acetate content at the EVA of 32wt% plastic sheeting) soften, be covered in the outer surface of model 1, the passage 4 being connected with model 1 by vacuum suction chamber 2 and model passage 12 are taken the air in special purpose model 1 and between film special 3 and special purpose model 1 away, model internal pressure is controlled at 0.030MPa, softening eva film 3 can be adjacent on model 1 outer surface,
The model 1 that is glued with eva film 3 is placed in vacuum forming incubator 5, and the insulation material described in insulation material 6(is comprised to the phenolic resins of 1.8wt%, the stearic acid of 1.2wt%, dimethicone, the acrylic acid modified rosin of 1.2wt% and the quartz sand of surplus of 1.5wt%) insert in incubator 5, carry out jolt ramming operation, to guarantee that insulation material 6 can close contact eva film 3;
Start vavuum pump, by connector 11, incubator 5 is carried out to vacuum pumping, make 5 casees interior negative pressure (pressure is controlled at 0.035 MPa) that form of incubator, further sclerosis eva film 3, and discharge the vacuum state in special purpose model 1, keep the negative pressure state of part between incubator 5 and film special 3, model 1 is taken out.
Upset is with the incubator 5 of eva film 3, and the heat retaining and exothermal body rising head 8 of placing rebound 7 and making, and place stay-warm case 9 and with dry sand 10 filling rising head 8 surroundings can obtain the composite sand mould described in the present embodiment.
The specific embodiment of the present invention is only for being further elaborated and illustrating technical scheme of the present invention; anyly can not limit scope of the present invention according to embodiment per capita, the embodiment of all distortion being equal to of making in the claimed scope of claims of the present invention and change is all in the present invention's scope required for protection.

Claims (4)

1. a composite sand mould moulding process of producing castable refractory, is characterized in that: described composite sand mould moulding process comprises the following steps:
(1) according to the vacuum forming model of the shape fabricating die wall porous of goods and hollow;
(2) model of step (1) gained is placed on the template with vacuum suction chamber, and be connected with vacuum suction chamber, adopt softening heater ethylene-vinyl acetate copolymer film to be softened to the outer surface of processing and be covered in model, heating-up temperature is 60-79 ℃, the passage being connected with model by vacuum suction chamber and model passage are taken the air in model and between film and model away, model internal pressure is controlled at 0.030-0.035 MPa, described film is close on the die wall of described model, in wherein said ethylene-vinyl acetate copolymer, the content of vinyl acetate is 25-35wt%,
(3) model that is glued with described film step (2) being obtained is placed in the vacuum forming incubator with vacuum suction chamber, insert insulation material jolt ramming to guarantee that insulation material can close contact film, start vavuum pump, by connector, incubator is carried out to vacuum pumping, make formation negative pressure in incubator case, pressure is controlled at 0.035-0.038MPa, further hardening film, and discharge the vacuum state in model, keep the negative pressure state of part between incubator and film, upset is with the incubator of film and take out model, place rebound and rising head, stay-warm case obtain described composite sand mould with dry sand filling rising head surrounding on cover, the phenolic resins that wherein said insulation material contains 1.8wt%, the stearic acid of 1.2wt%, the dimethicone of 1.5wt%, the acrylic acid modified rosin of 1.2wt% and the quartz sand of surplus, described rising head adopts the sand mould plate of heating resisting metal, resin-bonded, sand mould plate or the heat retaining and exothermal system of waterglass combination to become.
2. a kind of composite sand mould moulding process of producing castable refractory claimed in claim 1, is characterized in that: manganese dioxide, the furane resins of 0.8-1.5wt% and the phenolic resins of 0.6-1.5wt% of the aluminium powder of the silica fibre that described heat retaining and exothermal body contains 2.2-3.5 wt%, the quartz sand of 72-85wt%, 2.5-5.0wt%, the di-iron trioxide of 2.5-6.0wt%, 1.2-2.5.
3. a kind of composite sand mould moulding process of producing castable refractory claimed in claim 1, is characterized in that: described model refers to the model that adopts timber, resin or metal die wall porous and hollow.
4. a kind of composite sand mould moulding process of producing castable refractory claimed in claim 3, is characterized in that: described model refers to and adopts the die wall porous made of aluminum or aluminum alloy and the model of hollow.
CN201210184410.7A 2012-06-06 2012-06-06 Composite sand mould forming process for producing casting fireproof materials CN102672794B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210184410.7A CN102672794B (en) 2012-06-06 2012-06-06 Composite sand mould forming process for producing casting fireproof materials

Applications Claiming Priority (2)

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CN201210184410.7A CN102672794B (en) 2012-06-06 2012-06-06 Composite sand mould forming process for producing casting fireproof materials
PCT/CN2012/078519 WO2013181875A1 (en) 2012-06-06 2012-07-11 Composite sand casting process for producing cast fire-resistant material

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CN102672794A CN102672794A (en) 2012-09-19
CN102672794B true CN102672794B (en) 2014-05-28

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Publication number Priority date Publication date Assignee Title
CN102672808B (en) * 2012-06-06 2014-05-28 瑞泰科技股份有限公司 Composite mould for manufacturing casting fireproof materials
CN103360095B (en) * 2013-07-31 2018-07-17 刘中兴 Produce the vacuum full mold technique of fused and cast refractory products
CN105215280A (en) * 2015-11-06 2016-01-06 合肥熠辉轻合金科技有限公司 A kind of Aluminum alloy gravity casting metals mould compound dead head
CN110202089B (en) * 2019-07-11 2020-12-18 北京钢研高纳科技股份有限公司 Composite molding method of casting and application thereof

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EP2151290A1 (en) * 2007-06-01 2010-02-10 Sintokogio, LTD. Equipment for molding mold with molding flask, and method for molding mold with molding flask
CN101143460A (en) * 2007-08-31 2008-03-19 侯松发 Method for producing casting fireproof material by negative pressure hollow type method
CN101823122A (en) * 2010-03-24 2010-09-08 河南省前卫实业有限公司 Negative-pressure molding process of casting refractory material product

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Application publication date: 20120919

Assignee: Dujiangyan Ruitai Technology Co.,Ltd.

Assignor: Ruitai Technology Co., Ltd.

Contract record no.: 2014510000129

Denomination of invention: Composite sand mould forming process for producing casting fireproof materials

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License type: Exclusive License

Record date: 20140821