CN103920851B - A kind of method changing investment shell intensity by dipping organic binder bond - Google Patents
A kind of method changing investment shell intensity by dipping organic binder bond Download PDFInfo
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- CN103920851B CN103920851B CN201410077523.6A CN201410077523A CN103920851B CN 103920851 B CN103920851 B CN 103920851B CN 201410077523 A CN201410077523 A CN 201410077523A CN 103920851 B CN103920851 B CN 103920851B
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- Prior art keywords
- shell
- dipping
- strength
- intensity
- organic binder
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- 238000007598 dipping method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011230 binding agent Substances 0.000 title claims abstract description 9
- 238000005470 impregnation Methods 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 239000004816 latex Substances 0.000 claims abstract description 11
- 229920000126 latex Polymers 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 7
- 230000000717 retained effect Effects 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 3
- 239000011257 shell material Substances 0.000 description 41
- 239000010410 layer Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A kind of method changing investment shell intensity by dipping organic binder bond, PVA solution that impregnation liquid uses mass percentage concentration to be 0.5% 4%, mass percentage concentration are the latex solution of 2% 20% or have the liquid of default viscosity；Dip time is 2～10min, impregnates for successively, every which floor or only slurry seal layer is carried out；Treat that shell i.e. dewaxes after continuing after drying to prepare next stratotype shell, or slurry seal layer impregnation drying；The present invention is highly reliable, simple to operate, by adjusting impregnation liquid kind, concentration and the dipping number of plies, can conveniently change the strength character of various material shell: increase layer intensity by dipping and improve shell normal temperature strength, improve dewaxing anti-crack ability, weaken the combination of layer before and after dipping simultaneously, reduce retained strength, improve hulling performance, solve the problem that Mold Shell Strength in Lost Wax is difficult to coordinate to control.
Description
Technical field
The present invention relates to investment casting shell technical field, be specifically related to a kind of by dipping organic binder bond
The method changing investment shell intensity.
Background technology
Strength character is one of investment casting shell most basic performance, and shell has three kinds of strength characters, the most often
Temperature intensity, elevated temperature strength and retained strength, three has certain relation but different.Silicasol case
Being one of the most the most frequently used shell, its subject matter is that normal temperature strength is relatively low, high temperature and retained strength
High.In dewaxing process, wax material expands and shell can be produced higher stress effect, and normal temperature strength is low easily
Cause shell crackle；And retained strength is high, it is unfavorable for the cleaning after cast.
The method changing investment shell intensity at present mainly adds fiber, latex etc. in the slurry.Add fiber
Major Difficulties be the kind of fiber, content, length etc. all can appreciable impact slurry and the performance of shell,
Must select according to actual type shell material, viscosity etc.；Add latex simultaneously and can reduce stablizing of slurry
Property.And both of which has high requirement to slurry preparation technique, stirring condition layer.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, it is an object of the invention to provide a kind of by leaching
Stain organic binder bond changes the method for investment shell intensity, by controlling layer intensity and the Coating combination situation of shell
Change the intensity of shell, have method flexibly, reliable results and feature simple to operate.
For reaching object above, the present invention adopts the following technical scheme that
A kind of method changing investment shell intensity by dipping organic binder bond, impregnation liquid uses percent mass dense
PVA solution or mass percentage concentration that degree is 0.5%-4% are the latex solution of 2%-20%；Dip time
It is 2～10min, impregnates for successively, every which floor or only slurry seal layer is carried out；Treat that shell continues preparation after drying
I.e. dewax after next stratotype shell, or slurry seal layer impregnation drying.
Advantages of the present invention is as follows:
1) use the present invention not change the preparation process of shell, do not affect characteristic and the stucco of slurry
Journey, is not limited by type shell material, shape；
2) present invention can control the intensity of shell flexibly, by changing the kind of impregnation liquid, impregnation liquid quality
Percentage concentration, dip time, the number of plies etc. of dipping, can arbitrarily control investment shell intensity, to reach to have
Higher normal temperature strength, suitable elevated temperature strength and the shell of relatively low retained strength；
3) the inventive method is as being the most only slurry seal layer dipping, will not change the Coating combination situation of shell and only
After increase shell, which floor intensity, i.e. increases shell normal temperature strength and does not affect shell high temperature, retained strength.
Accompanying drawing explanation
Fig. 1 is the shell normal temperature strength column comparison diagram of embodiment of the present invention difference impregnation solution.
Fig. 2 is the hot strength of investment shell column comparison diagram of embodiment of the present invention difference impregnation solution.
Fig. 3 is the shell retained strength column comparison diagram of embodiment of the present invention difference impregnation solution.
Detailed description of the invention
It is desirable to provide a kind of side being changed Mold Shell Strength in Lost Wax by dipping organic binder bond
Method, not enough to solve current shell normal temperature strength, the problem that retained strength is too high.With Ludox-Kaolin
As a example by shell difference impregnation solution, the present invention is made further to retouch in detail by with specific embodiments and the drawings
State.
Such as table 1, for preparation and the dipping process of shell, binding agent is Ludox GS30, fire proofed wood
Material is calcined kaolin, and after interlayer drying time and dipping, drying time is 24h, and dip time is 5min.
Table 1 shell preparation process
Impregnation liquid: 00-without；L1-low content latex；L2-high-load latex；P1-low content PVA；P2-height contains
Amount PVA；Si-Ludox
Shell normal temperature strength, elevated temperature strength and retained strength result as shown in Figure 1, Figure 2 and Figure 3.
As seen from the figure, shell dipping reinforced effects is fairly obvious, and conclusion is as follows:
1) PVA, latex all can significantly improve shell normal temperature strength
2) owing to weakening Coating combination, PVA, latex all can reduce shell high temperature and retained strength
3) preparation process dipping latex can seriously reduce shell high temperature and retained strength, and therefore latex only can be used
Dipping in slurry seal layer.
4) by controlling the mass percentage concentration of PVA impregnation liquid, the dipping number of plies and dip time, can pass through
Control shell monolayer and Coating combination, change shell bulk strength, obtain that there is higher room temperature and high temperature
Intensity, the shell of relatively low retained strength.
Claims (1)
1. the method changing investment shell intensity by dipping organic binder bond, it is characterised in that: impregnation liquid
The PVA solution or the mass percentage concentration that use mass percentage concentration to be 0.5%-4% are the latex of 2%-20%
Solution；Dip time is 2～10min, impregnates for successively, every which floor or only slurry seal layer is carried out；Treat shell
Dried continuation i.e. dewaxes after preparing next stratotype shell, or slurry seal layer impregnation drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077523.6A CN103920851B (en) | 2014-03-04 | 2014-03-04 | A kind of method changing investment shell intensity by dipping organic binder bond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077523.6A CN103920851B (en) | 2014-03-04 | 2014-03-04 | A kind of method changing investment shell intensity by dipping organic binder bond |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103920851A CN103920851A (en) | 2014-07-16 |
| CN103920851B true CN103920851B (en) | 2016-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410077523.6A Active CN103920851B (en) | 2014-03-04 | 2014-03-04 | A kind of method changing investment shell intensity by dipping organic binder bond |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103920851B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399886B (en) * | 2014-11-03 | 2016-09-14 | 西安航空动力股份有限公司 | A kind of formwork back-up coat slurry preparation method and formwork processing method |
| RU2625859C2 (en) * | 2015-08-05 | 2017-07-19 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") | Method of manufacture of foundry high-fire-reinforced ceramic forms |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032503A (en) * | 1987-10-12 | 1989-04-26 | 国家机械工业委员会沈阳铸造研究所 | Compound shell-producing technology using silica-sol wash |
| CN1414054A (en) * | 2002-09-16 | 2003-04-30 | 章浩龙 | Silica sol binder and preparation method thereof |
| CN1438082A (en) * | 2002-09-16 | 2003-08-27 | 章浩龙 | Silica sol binder and preparation method thereof |
| CN101104195A (en) * | 2007-08-02 | 2008-01-16 | 哈尔滨工业大学 | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55106657A (en) * | 1979-02-09 | 1980-08-15 | Janome Sewing Mach Co Ltd | Forming method of mold for precision casting |
| JPS5617157A (en) * | 1979-07-18 | 1981-02-18 | Kubota Ltd | Reinforcing method of ceramic shell mold |
-
2014
- 2014-03-04 CN CN201410077523.6A patent/CN103920851B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032503A (en) * | 1987-10-12 | 1989-04-26 | 国家机械工业委员会沈阳铸造研究所 | Compound shell-producing technology using silica-sol wash |
| CN1414054A (en) * | 2002-09-16 | 2003-04-30 | 章浩龙 | Silica sol binder and preparation method thereof |
| CN1438082A (en) * | 2002-09-16 | 2003-08-27 | 章浩龙 | Silica sol binder and preparation method thereof |
| CN101104195A (en) * | 2007-08-02 | 2008-01-16 | 哈尔滨工业大学 | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell |
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| Publication number | Publication date |
|---|---|
| CN103920851A (en) | 2014-07-16 |
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