CN103464684A - Precise investment casting method - Google Patents
Precise investment casting method Download PDFInfo
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- CN103464684A CN103464684A CN2013104364623A CN201310436462A CN103464684A CN 103464684 A CN103464684 A CN 103464684A CN 2013104364623 A CN2013104364623 A CN 2013104364623A CN 201310436462 A CN201310436462 A CN 201310436462A CN 103464684 A CN103464684 A CN 103464684A
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Abstract
The invention discloses a precise investment casting method. The precise investment casting method mainly comprises the steps of coating for manufacturing a shell, dewaxing, roasting, pouring and the like and further comprises the steps of manufacturing a cooling member according to an easily loosened part structure of a casting, manufacturing a cooling member wax mold same with the cooling member according to the overall dimension of the cooling member, and arranging the cooling member wax mold at the corresponding position of a casting wax mold; after coating a layer of materials each time, removing coatings on the outer surface of the cooling member wax mold so as to form a cavity for placing the cooling member in a mold shell after the dewaxing and roasting steps; fixedly placing the cooling member in the cavity. According to the precise investment casting method, the cooling member is skillfully avoided being subjected to high-temperature roasting along with the mold shell, the outer surface oxidation and internal structure change of the cooling member caused by the high-temperature roasting are prevented, the cooling effect of the cooling member is improved, and the defects of the cavity shrinkage and loosening of the casting are effectively prevented.
Description
Technical field
The invention belongs to the melted module precise casting technology field, particularly eliminate the casting method of shrinkage cavity, rarefaction defect.
Background technology
In investment casting process, the shrinkage cavity of foundry goods, rarefaction defect is comparatively common, particularly light-alloy is as aluminium, the thick large part of magnesium precision-investment casting medium casting easily produces loose, the defects such as shrinkage cavity, adopt the air-cooled porous spot of blowing in realizing production, but effect is all undesirable, casting qualified rate is low, the air-cooled foundry goods that easily makes of drying produces air-breathing oxidizing fire, secondary casting flaw appears, for this reason, some foundry enterprise utilizes cooling-part heat conduction to solve shrinkage cavity, rarefaction defect, while utilizing cooling-part heat conduction, be generally just cooling-part to be arranged on wax-pattern in shell process processed, the shortcoming of this mode is mainly that cooling-part will need stand high-temperature roasting along with the shell process, easily cause the oxidation of cooling-part outer surface and internal structure change, reduce cooling effect, affect the cast article quality.
Summary of the invention
The problem existed for solving prior art, the invention provides a kind of precision-investment casting method, can improve cooling effect, efficiently solves the problems such as shrinkage cavity, rarefaction defect.
Technical scheme of the present invention is as described below:
A kind of precision-investment casting method, mainly comprise the steps such as wax-pattern compacting, running channel combination, paint case making, dewaxing, roasting, cast, casting cleaning, wherein also comprises the steps:
A, in described running channel combination step, be prone to the portion structure of rarefaction defect according to foundry goods, make a cooling-part, then make identical with it cooling-part wax-pattern according to the overall size of cooling-part, then the cooling-part wax-pattern is arranged on the relevant position of casting wax mould;
B, in described paint case making step, after every painting one layered material, the coating of cooling-part wax-pattern outer surface is wiped so that after Tuo La and calcination steps, form one and there is the cavity of placing cooling-part on shell;
C, before described cast step, cooling-part is placed in cavity, and adopts refractory powder+binder mixtures caulking joint to fix.
Advantage of the present invention and beneficial effect are:
The present invention adopts the cooling-part mode cooling, avoided dexterously cooling-part along with the shell high-temperature roasting, outer surface oxidation and internal structure change that cooling-part produces because of high-temperature roasting have been prevented, promoted the stability of cooling-part, improved the cooling effect of cooling-part, effectively prevent the generation of foundry goods shrinkage cavity, rarefaction defect, promoted the qualification rate of foundry goods, and this method is simple to operate.
The accompanying drawing explanation
Fig. 1 utilizes the present invention to produce the schematic diagram of an annular casing hot investment casting part;
In figure: 1-shell, 2-cooling-part, 3-refractory powder+binder mixtures
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, but the scope that should at this point not be interpreted as theme of the present invention only limits to following embodiment, do not breaking away under the technology of the present invention state of mind, all various modifications, replacement and changes of making according to ordinary skill knowledge and customary means, include within the scope of the invention.
Embodiment mono-
As shown in Figure 1, a kind of precision-investment casting method, mainly comprise the steps such as wax-pattern compacting, running channel combination, paint case making, dewaxing, roasting, cast, casting cleaning, characterized by further comprising following steps:
A, in described running channel combination step, be prone to the portion structure of rarefaction defect according to foundry goods, make a cooling-part 2, then make identical with it cooling-part 2 wax-patterns according to the overall size of cooling-part 2, then cooling-part 2 wax-patterns are arranged on the relevant position of casting wax mould;
B, in described paint case making step, after every painting one layered material, the coating of cooling-part wax-pattern outer surface is wiped so that after Tuo La and calcination steps, form one and there is the cavity of placing cooling-part 2 on shell 1;
C, before described cast step, cooling-part is placed in cavity, and adopts 3 caulking joints of refractory powder+binder mixtures to fix.
In the present embodiment, described cooling-part 2 is metal heat-conducting piece, as iron block, copper billet, aluminium block etc., when adopting iron block, can effectively reduce production costs, and heat-conducting effect is also better.
Further, in the present embodiment, described refractory powder is 270
﹟～325
﹟colliery powder.
Utilize this method avoided dexterously cooling-part as iron block along with the shell high-temperature roasting.Prevented that cooling-part from, because of outer surface oxidation and internal structure change that high-temperature roasting produces, having improved the stability of cooling-part, thereby having improved the cold effect of cooling-part, can effectively prevent the generation of foundry goods shrinkage cavity, rarefaction defect, and simple to operate.
Embodiment bis-
As shown in Figure 1,, a kind of precision-investment casting method, mainly comprise the steps such as wax-pattern compacting, running channel combination, paint case making, dewaxing, roasting, cast, casting cleaning, characterized by further comprising following steps:
A, in described running channel combination step, be prone to the portion structure of rarefaction defect according to foundry goods, make a cooling-part 2, make identical with it cooling-part 2 wax-patterns according to the overall size of cooling-part 2 again, then cooling-part 2 wax-patterns are arranged on the relevant position of casting wax mould, in described cooling-part 2, are provided with the cooling medium circulation pipe;
B, in described paint case making step, after every painting one layered material, the coating of cooling-part wax-pattern outer surface is wiped so that after Tuo La and calcination steps, form one and there is the cavity of placing cooling-part 2 on shell 1;
C, before described cast step, cooling-part is placed in cavity, and adopts 3 caulking joints of refractory powder+binder mixtures to fix.
Further, in the present embodiment, described refractory powder is 270
﹟～325
﹟colliery powder.
Further, in the present embodiment, pass into cooling medium in described cooling medium circulation pipe, cooling medium is water or chilled brine, when adopting chilled brine, can further improve cooling heat-conducting effect, thereby significantly reduce foundry goods shrinkage cavity, rarefaction defect, the cast product qualification rate is than improving more than 5% by water cooling.
Claims (6)
1. a precision-investment casting method, mainly comprise the steps such as wax-pattern compacting, running channel combination, paint case making, dewaxing, roasting, cast, casting cleaning, characterized by further comprising following steps:
A, in described running channel combination step, be prone to the portion structure of rarefaction defect according to foundry goods, make a cooling-part (2), make identical with it cooling-part (2) wax-pattern according to the overall size of cooling-part (2) again, then cooling-part (2) wax-pattern is arranged on the relevant position of casting wax mould;
B, in described paint case making step, after every painting one layered material, the coating of cooling-part wax-pattern outer surface is wiped so that after Tuo La and calcination steps, form a cavity with placement cooling-part (2) shell (1) is upper;
C, before described cast step, cooling-part is placed in cavity, and adopts refractory powder+binder mixtures (3) caulking joint to fix.
2. a kind of precision-investment casting method according to claim 1, it is characterized in that: described cooling-part (2) is metal heat-conducting piece.
3. a kind of precision-investment casting method according to claim 1, it is characterized in that: described cooling-part is provided with the cooling medium circulation pipe in (2).
4. a kind of precision-investment casting method according to claim 2, it is characterized in that: described metal heat-conducting piece is iron block.
5. a kind of precision-investment casting method according to claim 3, it is characterized in that: the cooling medium passed in described cooling medium circulation pipe is water or chilled brine.
6. according to the described any precision-investment casting method of claim 1～5, it is characterized in that described refractory powder is 270
﹟～325
﹟colliery powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104364623A CN103464684A (en) | 2013-09-23 | 2013-09-23 | Precise investment casting method |
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|---|---|---|---|
| CN2013104364623A CN103464684A (en) | 2013-09-23 | 2013-09-23 | Precise investment casting method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397027A (en) * | 2015-12-02 | 2016-03-16 | 株洲中航动力精密铸造有限公司 | Casting method of casting |
| CN105458180A (en) * | 2015-11-20 | 2016-04-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming pouring gate with dewaxing opening and preparing and blocking method of forming pouring gate |
| CN106513575A (en) * | 2016-09-29 | 2017-03-22 | 广西大学 | Manufacturing method of precise casting mold |
| CN109604523A (en) * | 2019-01-28 | 2019-04-12 | 株洲中航动力精密铸造有限公司 | Preparation method, the preparation method and application of hot investment casting casting of precision casting shell |
| CN113547079A (en) * | 2021-07-28 | 2021-10-26 | 贵州安吉航空精密铸造有限责任公司 | Alloy casting molding method |
| CN114951586A (en) * | 2022-05-30 | 2022-08-30 | 阿诺诗(广东)精密金属科技有限公司 | Cold and hot paste application structure of precision casting and application method thereof |
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| JPS59191542A (en) * | 1983-04-15 | 1984-10-30 | Toyota Motor Corp | Investment casting method |
| JPS63168250A (en) * | 1987-01-05 | 1988-07-12 | Kobe Steel Ltd | Locally cooling method for lost-wax casting |
| CN101767193A (en) * | 2009-12-25 | 2010-07-07 | 沈阳工业大学 | Process method for eliminating loose of thick and large casting of high-temperature alloy |
| CN102463322A (en) * | 2010-11-15 | 2012-05-23 | 贵州安吉航空精密铸造有限责任公司 | Method for improving quality of investment precision cast shuttering |
| CN102806313A (en) * | 2012-09-03 | 2012-12-05 | 贵州安吉航空精密铸造有限责任公司 | Method for preventing casting boss from shrinkage porosity |
| CN103192027A (en) * | 2013-03-28 | 2013-07-10 | 清华大学 | Partial cooling method of cold iron in investment casting |
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2013
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| JPS59191542A (en) * | 1983-04-15 | 1984-10-30 | Toyota Motor Corp | Investment casting method |
| JPS63168250A (en) * | 1987-01-05 | 1988-07-12 | Kobe Steel Ltd | Locally cooling method for lost-wax casting |
| CN101767193A (en) * | 2009-12-25 | 2010-07-07 | 沈阳工业大学 | Process method for eliminating loose of thick and large casting of high-temperature alloy |
| CN102463322A (en) * | 2010-11-15 | 2012-05-23 | 贵州安吉航空精密铸造有限责任公司 | Method for improving quality of investment precision cast shuttering |
| CN102806313A (en) * | 2012-09-03 | 2012-12-05 | 贵州安吉航空精密铸造有限责任公司 | Method for preventing casting boss from shrinkage porosity |
| CN103192027A (en) * | 2013-03-28 | 2013-07-10 | 清华大学 | Partial cooling method of cold iron in investment casting |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458180A (en) * | 2015-11-20 | 2016-04-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming pouring gate with dewaxing opening and preparing and blocking method of forming pouring gate |
| CN105458180B (en) * | 2015-11-20 | 2017-12-12 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of shaping running channel and its preparation and method for blocking containing wax discharging port |
| CN105397027A (en) * | 2015-12-02 | 2016-03-16 | 株洲中航动力精密铸造有限公司 | Casting method of casting |
| CN106513575A (en) * | 2016-09-29 | 2017-03-22 | 广西大学 | Manufacturing method of precise casting mold |
| CN109604523A (en) * | 2019-01-28 | 2019-04-12 | 株洲中航动力精密铸造有限公司 | Preparation method, the preparation method and application of hot investment casting casting of precision casting shell |
| CN113547079A (en) * | 2021-07-28 | 2021-10-26 | 贵州安吉航空精密铸造有限责任公司 | Alloy casting molding method |
| CN114951586A (en) * | 2022-05-30 | 2022-08-30 | 阿诺诗(广东)精密金属科技有限公司 | Cold and hot paste application structure of precision casting and application method thereof |
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Application publication date: 20131225 |