CN108436028A - A kind of new type silica sol, water glass composite shell and preparation method thereof - Google Patents

A kind of new type silica sol, water glass composite shell and preparation method thereof Download PDF

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Publication number
CN108436028A
CN108436028A CN201810085014.6A CN201810085014A CN108436028A CN 108436028 A CN108436028 A CN 108436028A CN 201810085014 A CN201810085014 A CN 201810085014A CN 108436028 A CN108436028 A CN 108436028A
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CN
China
Prior art keywords
compound crystal
ludox
mesh
powder
sand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810085014.6A
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Chinese (zh)
Inventor
陈象青
刘成铭
沈雁
李勇
周立明
宋连华
叶世林
徐爱民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANHUI HUOSHAN KEWAN SPECIAL CASTING Co Ltd
Original Assignee
ANHUI HUOSHAN KEWAN SPECIAL CASTING Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ANHUI HUOSHAN KEWAN SPECIAL CASTING Co Ltd filed Critical ANHUI HUOSHAN KEWAN SPECIAL CASTING Co Ltd
Priority to CN201810085014.6A priority Critical patent/CN108436028A/en
Publication of CN108436028A publication Critical patent/CN108436028A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/18Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
    • B22C1/186Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C3/00Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • B22C9/04Use of lost patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/12Treating moulds or cores, e.g. drying, hardening

Abstract

The present invention discloses a kind of new type silica sol, water glass composite shell and preparation method thereof, including superficial layer, transition zone, reinforcing layer, the superficial layer is made of Ludox, compound crystal powder and the compound crystal sand of 80 120 mesh, the transition zone is made of Ludox, compound crystal powder and the compound crystal sand of 40 70 mesh, the reinforcing layer is made of the mullite powder of silica-sol wash, mullite powder and 16 30 mesh, the product form strength that the present invention makes is high, it is at low cost, it is not limited by mould-type, fabrication cycle is short, substantially increases the performance of enterprises.

Description

A kind of new type silica sol, water glass composite shell and preparation method thereof
Technical field
The present invention relates to made of metal shell processing technique field, specific more particularly to a kind of new type silica sol, waterglass are compound Shell and preparation method thereof.
Background technology
Ludox is silicon dioxide microparticle evenly dispersed colloidal solution in water, is a kind of inorganic high score of function admirable Sub- binder is used for the binder of wax-pattern shell, wax-pattern shell is by being repeatedly coated with slurry and stucco, sand in hot investment casting Be bonded together by Ludox and slurry between layer, formation shell processed, existing shell Material have silica flour, quartz sand, schmigel, Mullite sand, zirconium English powder, zircon sand etc., but differed on being applicable in pouring temperature, there are the cast temperature difference, and with cast formwork The increase of thickness is dried and also becomes further difficult, how to be reduced in cast number and ensures that form strength is ability convenient for drying Domain technical problems to be solved.
Invention content
For this purpose, a kind of new type silica sol of present invention proposition, water glass composite shell and preparation method thereof, form strength is high, It is at low cost, it is not limited by mould-type, fabrication cycle is short, substantially increases the performance of enterprises.
The present invention is realized by following means:
A kind of new type silica sol, water glass composite shell, including superficial layer, transition zone, reinforcing layer, the superficial layer be Ludox, compound crystal powder and the compound crystal sand of 80-120 mesh are made, and the transition zone is that Ludox, compound crystal powder and 40-70 purposes are multiple Crystal sand is made, and the reinforcing layer is made of the mullite powder of silica-sol wash, mullite powder and 16-30 mesh.
The compound crystal powder, the used raw material of compound crystal sand are identical, the raw material described in the two be by following material proportion and At:Al2O3>=80%, SiO2≤ 18%, Fe2O3≤ 0.06%, preparaton≤0.1%.
Preferably, the preparaton includes following component:Trim,ethylchlorosilane, graphite, antimony pentafluoride close fluoro sulphur Acid.
Preferably, each component trim,ethylchlorosilane in the preparaton, graphite, antimony pentafluoride close the proportioning of flurosulphonic acid For 3-6:1-2:4-8.
The production method of a kind of new type silica sol, water glass composite shell, includes following steps:
1) entire blending process carries out under the conditions of L-type blender is continuously run, and L-type blade must be over center, And blade and cylinder side, cylinder bottom gap about 5mm;It is excessive, precipitation is will appear in blending process;
2) be first added Ludox, then gradually uniformly, be slowly added into compound crystal powder, continuously stir 8-9 hours after adding, then With 6# flow cup viscosimeter viscosimetrics density is then measured until after viscosity reaches requirement;The determination for measuring viscosity number, is in cylinder Feeding is distinguished on center, cylinder side, then takes its average value;It is stained with coating with sheet glass, light is observed, determines and applies if no particle point Material stirring is uniform;Often plus 2-3Kg compound crystal powder;Dope viscosity can be improved 5 seconds or so;Often plus 0.5Kg Ludox, dope viscosity can It reduces by 5 seconds or so, is adjusted according to above-mentioned rule;
3) superficial layer uses above-mentioned steps 2) made from Ludox add compound crystal powder coating, the ratio of Ludox and compound crystal powder is 1:0.9-1.1, viscosity are 15 ± 2 seconds, are prewetted using S830 Ludox, ensure that environment temperature is 21-27 DEG C, relative humidity is 50-60RH, it is 6-8h that superficial layer stucco, which uses the compound crystal sand of 80-120 mesh, dry firm time,;
4) transition zone be two layers, be all made of above-mentioned steps 2) made from Ludox add compound crystal powder coating, Ludox and compound crystal The ratio of powder is 1:1.3-1.5, viscosity 18-20 seconds, is prewetted using S1430 Ludox, and guarantee environment temperature is 21-27 DEG C, relative humidity 40-50RH, transition zone stucco uses the compound crystal sand of 40-70 mesh, dry firm time to be no less than 10h;
5) reinforcing layer is two layers, and the ratio that the 4th layer, layer 5 silica-sol wash and mullite divide is 1:1.5-1.8, stream Cup viscosity 20-25 seconds ensures that environment temperature is 21-27 DEG C, relative humidity 40-50RH, and reinforcing layer stucco uses 16-30 mesh Mullite sand, at room temperature product drying harden.
Advantageous effect of the present invention:Product form strength of the present invention is high, and low manufacture cost, product is easily dried, and this hair Bright the method can not be limited by mould-type, and fabrication cycle is short, can greatly improve the performance of enterprises.
Specific implementation mode:
In order to make those skilled in the art more fully understand technical scheme of the present invention, with reference to embodiment to this hair It is bright to be described further:
Embodiment one
A kind of new type silica sol, water glass composite shell, including superficial layer, transition zone, reinforcing layer, the superficial layer be Ludox, compound crystal powder and the compound crystal sand of 80-120 mesh are made, and the transition zone is that Ludox, compound crystal powder and 40-70 purposes are multiple Crystal sand is made, and the reinforcing layer is made of the mullite powder of silica-sol wash, mullite powder and 16-30 mesh.
The compound crystal powder, the used raw material of compound crystal sand are identical, the raw material described in the two be by following material proportion and At:Al2O3>=80%, SiO2≤ 18%, Fe2O3≤ 0.06%, preparaton≤0.1%.
Preferably, the preparaton includes following component:Trim,ethylchlorosilane, graphite, antimony pentafluoride close fluoro sulphur Acid.
Preferably, each component trim,ethylchlorosilane in the preparaton, graphite, antimony pentafluoride close the proportioning of flurosulphonic acid For 3-6:1-2:4-8.
The production method of a kind of new type silica sol, water glass composite shell, includes following steps:
1) entire blending process carries out under the conditions of L-type blender is continuously run, and L-type blade must be over center, And blade and cylinder side, cylinder bottom gap about 5mm;It is excessive, precipitation is will appear in blending process;
2) be first added Ludox, then gradually uniformly, be slowly added into compound crystal powder, continuously stir 8-9 hours after adding, then With 6# flow cup viscosimeter viscosimetrics density is then measured until after viscosity reaches requirement;The determination for measuring viscosity number, is in cylinder Feeding is distinguished on center, cylinder side, then takes its average value;It is stained with coating with sheet glass, light is observed, determines and applies if no particle point Material stirring is uniform;Often plus 2-3Kg compound crystal powder;Dope viscosity can be improved 5 seconds or so;Often plus 0.5Kg Ludox, dope viscosity can It reduces by 5 seconds or so, is adjusted according to above-mentioned rule;
3) superficial layer uses above-mentioned steps 2) made from Ludox add compound crystal powder coating, the ratio of Ludox and compound crystal powder is 1:0.9-1.1, viscosity are 15 ± 2 seconds, are prewetted using S830 Ludox, ensure that environment temperature is 21-27 DEG C, relative humidity is 50-60RH, it is 6-8h that superficial layer stucco, which uses the compound crystal sand of 80-120 mesh, dry firm time,;
4) transition zone be two layers, be all made of above-mentioned steps 2) made from Ludox add compound crystal powder coating, Ludox and compound crystal The ratio of powder is 1:1.3-1.5, viscosity 18-20 seconds, is prewetted using S1430 Ludox, and guarantee environment temperature is 21-27 DEG C, relative humidity 40-50RH, transition zone stucco uses the compound crystal sand of 40-70 mesh, dry firm time to be no less than 10h;
5) reinforcing layer is two layers, and the ratio that the 4th layer, layer 5 silica-sol wash and mullite divide is 1:1.5-1.8, stream Cup viscosity 20-25 seconds ensures that environment temperature is 21-27 DEG C, relative humidity 40-50RH, and reinforcing layer stucco uses 16-30 mesh Mullite sand, at room temperature product drying harden.
Above certain exemplary embodiments that the present invention is only described by way of explanation, undoubtedly, for ability The those of ordinary skill in domain without departing from the scope of the invention can be with a variety of different modes to described reality Example is applied to be modified.Therefore, foregoing description is regarded as illustrative in nature, and should not be construed as protecting model to the claims in the present invention The limitation enclosed.
Unless otherwise defined, all academic and scientific terminologies used herein have the technical field of the invention common The identical meanings that technical staff is understood.
In the case of inconsistent, the definition in this specification shall prevail.
Unless otherwise indicated, all percentage, number, ratio etc. are by weight.
When providing numerical value or numberical range, a series of preferred scope or lower preferable values and upper limit preferred value, should manage It is solved to specifically disclose by any of any smaller range limit or preferred value and any larger range limit or preferred value One logarithm is formed by any range, regardless of whether range is disclosed respectively.Unless otherwise indicated, it is described in this specification In place of numberical range, the range is intended to include all integers and the score in range endpoints and range.
When term " about " or " left and right " are used to describe the end value of number value or range, disclosure of that should be include this Concrete numerical value or involved end value.
Using the element and component of the usage of " one " and "/kind " the description present invention, this only for it is convenient and in order to Provide ordinary circumstance of the present invention.Unless otherwise apparent statement, which should be interpreted as include/kind or at least one/kind.

Claims (4)

1. a kind of new type silica sol, water glass composite shell, it is characterised in that:It is described including superficial layer, transition zone, reinforcing layer Superficial layer be made of Ludox, compound crystal powder and the compound crystal sand of 80-120 mesh, the transition zone be Ludox, compound crystal powder with The compound crystal sand of 40-70 mesh is made, and the reinforcing layer is made of the mullite powder of silica-sol wash, mullite powder and 16-30 mesh.
2. a kind of new type silica sol according to claim 1, water glass composite shell, it is characterised in that:It is described Compound crystal powder, the used raw material of compound crystal sand it is identical, the raw material described in the two is formed by following material proportion:Al2O3≥ 80%, SiO2≤ 18%, Fe2O3≤ 0.06%, preparaton≤0.1%.
3. a kind of new type silica sol according to claim 2, water glass composite shell, it is characterised in that:The preparaton stated It include following component:Trim,ethylchlorosilane, graphite, antimony pentafluoride close flurosulphonic acid, the trim,ethylchlorosilane, graphite, The proportioning that antimony pentafluoride closes flurosulphonic acid is 3-6:1-2:4-8.
4. the production method of a kind of new type silica sol, water glass composite shell includes following steps:
1) entire blending process carries out under the conditions of L-type blender is continuously run, and L-type blade must be over center, and leaf Piece and cylinder side, cylinder bottom gap about 5mm;It is excessive, precipitation is will appear in blending process;
2) be first added Ludox, then gradually uniformly, be slowly added into compound crystal powder, continuously stirred after adding 8-9 hours, then use 6# Flow cup viscosimeter viscosimetric then measures density until after viscosity reaches requirement;Measure viscosity number determination, be cylinder center, Feeding is distinguished on cylinder side, then takes its average value;It is stained with coating with sheet glass, light is observed, determines that coating stirs if no particle point It mixes uniformly;Often plus 2-3Kg compound crystal powder;Dope viscosity can be improved 5 seconds or so;Often plus 0.5Kg Ludox, dope viscosity can reduce It 5 seconds or so, is adjusted according to above-mentioned rule;
3) superficial layer uses above-mentioned steps 2) made from Ludox add compound crystal powder coating, the ratio of Ludox and compound crystal powder is 1: 0.9-1.1, viscosity are 15 ± 2 seconds, are prewetted using S830 Ludox, ensure that environment temperature is 21-27 DEG C, relative humidity 50- 60RH, it is 6-8h that superficial layer stucco, which uses the compound crystal sand of 80-120 mesh, dry firm time,;
4) transition zone is two layers, is all made of above-mentioned steps 2) made from Ludox add compound crystal powder coating, Ludox and compound crystal powder Ratio is 1:1.3-1.5, viscosity 18-20 seconds, is prewetted using S1430 Ludox, ensures that environment temperature is 21-27 DEG C, phase It is 40-50RH to humidity, transition zone stucco uses the compound crystal sand of 40-70 mesh, dry firm time to be no less than 10h;
5) reinforcing layer is two layers, and the ratio that the 4th layer, layer 5 silica-sol wash and mullite divide is 1:1.5-1.8 flow cup is viscous Degree 20-25 seconds ensures that environment temperature is 21-27 DEG C, relative humidity 40-50RH, and reinforcing layer stucco uses 16-30 purposes not Carry out stone sand, product drying hardens at room temperature.
CN201810085014.6A 2018-01-29 2018-01-29 A kind of new type silica sol, water glass composite shell and preparation method thereof Pending CN108436028A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111266519A (en) * 2019-12-25 2020-06-12 江苏金研新材料科技有限公司 Preparation technology and application of large-scale high-strength composite shell

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713475A (en) * 1971-01-04 1973-01-30 Nalco Chemical Co Shell molds
CN103056340A (en) * 2013-01-06 2013-04-24 沈阳化工大学 Method for casting surface layer by using TiAlC-base ceramic powder as metal and titanium alloy
CN104368757A (en) * 2014-11-07 2015-02-25 沈阳黎明航空发动机(集团)有限责任公司 Thin-walled circular type investment casting shell and preparation method thereof
CN104475682A (en) * 2014-12-17 2015-04-01 北京航空航天大学 Combined wax pattern-based method of achieving precision investment casting for heat-resistant cast steel thin-wall turbine shell
CN105344924A (en) * 2015-10-26 2016-02-24 无锡市永亿精密铸造有限公司 Shell primary layer coating for casting of precise casting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713475A (en) * 1971-01-04 1973-01-30 Nalco Chemical Co Shell molds
CN103056340A (en) * 2013-01-06 2013-04-24 沈阳化工大学 Method for casting surface layer by using TiAlC-base ceramic powder as metal and titanium alloy
CN104368757A (en) * 2014-11-07 2015-02-25 沈阳黎明航空发动机(集团)有限责任公司 Thin-walled circular type investment casting shell and preparation method thereof
CN104475682A (en) * 2014-12-17 2015-04-01 北京航空航天大学 Combined wax pattern-based method of achieving precision investment casting for heat-resistant cast steel thin-wall turbine shell
CN105344924A (en) * 2015-10-26 2016-02-24 无锡市永亿精密铸造有限公司 Shell primary layer coating for casting of precise casting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111266519A (en) * 2019-12-25 2020-06-12 江苏金研新材料科技有限公司 Preparation technology and application of large-scale high-strength composite shell

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Application publication date: 20180824

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