CN113600752A - Investment casting molding method - Google Patents
Investment casting molding method Download PDFInfo
- Publication number
- CN113600752A CN113600752A CN202110908205.XA CN202110908205A CN113600752A CN 113600752 A CN113600752 A CN 113600752A CN 202110908205 A CN202110908205 A CN 202110908205A CN 113600752 A CN113600752 A CN 113600752A
- Authority
- CN
- China
- Prior art keywords
- air
- shell
- investment casting
- heat exchange
- casting molding
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005495 investment casting Methods 0.000 title claims abstract description 16
- 238000000465 moulding Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 238000005266 casting Methods 0.000 claims abstract description 22
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 239000011819 refractory material Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 abstract description 7
- 230000005494 condensation Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 238000013021 overheating Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to an investment casting forming method, which comprises the following steps: preparing a wax mould according to a design drawing, firstly coating a plurality of layers of refractory materials on the outer surface of the wax mould, then roasting the refractory materials, melting and removing the wax mould to obtain a shell, then pouring and smelting alloy materials in a liquid state into the shell, providing an air compressor and an air cooling device, cooling compressed air generated by the air compressor through the air cooling device, then cooling the thick and large hot spot parts in the shell, and obtaining a casting after the alloy materials are solidified. By adopting the technical scheme of the invention, the compressed air generated by the air compressor is cooled by the air cooling device, and then the compressed air is cooled by aiming at the thick and large hot spot part in the shell, so that the condensation speed of the alloy material injected into the part is accelerated, the defects of overheating shrinkage cavity and porosity at the local position in the shell are prevented, the foundation is laid for improving the molding quality of the casting, the frequency of repairing and processing the casting at the later stage is avoided or reduced, and the labor intensity of workers is reduced.
Description
Technical Field
The invention relates to the technical field of investment casting, in particular to an investment casting forming method.
Background
In the casting and forming process, firstly, a casting mold is prepared according to the shape of a product, then a metal material which is smelted into liquid is poured into the casting mold through a pouring cup, and the casting and forming are carried out after the metal material is condensed, along with the continuous development of the casting process technology, the shape and the structure of a casting are more and more complex, when the alloy material which is smelted into a liquid state is poured into the shell, the condensation rates of the metal material in all areas in the shell are not consistent, particularly, at the thick and large thermal junction part, the metal material has the longest time for reaching the complete condensation due to the small contact area with the external environment and the slow cooling speed, so that overheating shrinkage cavities and loosening defects are easily generated at the corresponding position of the finally formed casting, the casting forming quality is influenced, the casting is scrapped, or the casting must be repaired at the later stage, and the labor intensity of workers is increased.
Disclosure of Invention
In order to solve the technical problem, the invention provides an investment casting forming method.
The invention provides an investment casting forming method, which comprises the following steps:
preparing a wax pattern according to a design drawing, firstly coating a plurality of layers of refractory materials on the outer surface of the wax pattern, roasting the refractory materials, melting and removing the wax pattern to obtain a shell, then pouring and smelting alloy materials in a liquid state into the shell, providing an air compressor and an air cooling device, cooling compressed air generated by the air compressor by the air cooler, then, aligning to a thick and large thermal node part in the shell for cooling, and obtaining a casting after the alloy materials are solidified.
The alloy material is aluminum alloy or magnesium alloy.
The temperature of the compressed air after being cooled by the air cooling device is 0-10 ℃.
The air cooling device comprises an ice chest, a water tank and a heat exchange tube, wherein the water tank is placed in the ice chest, clear water is contained in the water tank, the heat exchange tube is immersed in the clear water, the two ends of the heat exchange tube extend out of the ice chest respectively, one end of the heat exchange tube is used as an air inlet and is communicated with the output end of the air compressor, and the other end of the heat exchange tube is used as an air outlet and is used for aligning to a thick and large heat joint part in the shell for cooling.
The heat exchange tubes are arranged in a convoluted and coiled manner with the center of the water tank as a convolution center and are arranged in a circuitous manner on the left side or the right side or the front side and the rear side of the water tank along the direction from top to bottom.
And a plug is arranged at the air inlet or the air outlet.
The heat exchange tube is made of a galvanized iron tube.
The water tank is made of a steel plate with the thickness not less than 3 mm.
The invention has the beneficial effects that: by adopting the technical scheme of the invention, the compressed air generated by the air compressor is cooled to 0-10 ℃ by the air cooling device, and then the compressed air is cooled aiming at the thick and large thermal junction part in the shell, so that the condensation speed of the alloy material injected into the part is accelerated, and the difference of the condensation speed of the alloy material in each area in the shell is reduced, thereby preventing the defects of overheating shrinkage cavity and porosity at the local position, laying a foundation for improving the molding quality of the casting, being beneficial to improving the qualification rate of the finished casting, avoiding or reducing the frequency of repairing and processing the casting at the later stage, and reducing the labor intensity of workers.
Drawings
FIG. 1 is a schematic structural diagram of an air cooling device according to the present invention;
fig. 2 is a top view of fig. 1 of the present invention.
In the figure: 1-refrigerator, 2-water tank, 3-heat exchange tube, 4-air inlet, 5-air outlet and 6-plug.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings, but the claimed protection scope is not limited thereto;
the invention provides an investment casting forming method, which comprises the following steps as shown in figures 1 and 2:
preparing a wax mould according to a design drawing, firstly coating a plurality of layers of refractory materials on the outer surface of the wax mould, then roasting the refractory materials, melting and removing the wax mould to obtain a shell, then pouring and smelting alloy materials in a liquid state into the shell, providing an air compressor and an air cooling device, cooling compressed air generated by the air compressor through the air cooling device, then cooling the thick and large hot spot parts in the shell, and obtaining a casting after the alloy materials are solidified.
Further, it is preferable that the alloy material is an aluminum alloy or a magnesium alloy. The temperature of the compressed air after being cooled by the air cooling device is 0-10 ℃.
In addition, the air cooling device comprises an ice chest 1, a water tank 2 and a heat exchange tube 3, wherein the water tank 2 is placed in the ice chest 1, clear water is contained in the water tank 2, the heat exchange tube 3 is immersed in the clear water, two ends of the heat exchange tube extend out of the ice chest 1 respectively, one end of the heat exchange tube 3 serves as an air inlet 4 and is used for being communicated with the output end of an air compressor, and the other end of the heat exchange tube 3 serves as an air outlet 5 and is used for being aligned to a thick and large heat joint part in a shell for cooling. The heat exchange tubes 3 are arranged in a convoluted manner with the center of the water tank 2 as a convolution center and are arranged in a circuitous manner on the left and right sides or the front and rear sides of the water tank 2 along the top-down direction. Therefore, the part of the heat exchange tube 3 immersed in the clean water is maximized as much as possible, and the refrigeration and cooling effects on the compressed air are effectively improved.
In addition, a plug 6 is arranged at the air inlet 4 or the air outlet 5. When the air cooling device is idle, the two ends of the heat exchange tube 3 can be plugged by the plugs 6, clear water is prevented from entering the inside of the heat exchange tube 3 and freezing to block the heat exchange tube 3, and the preferable heat exchange tube 3 is made of a galvanized iron tube. The water tank 2 is made of a steel plate with the thickness not less than 3 mm.
By adopting the technical scheme of the invention, the compressed air generated by the air compressor is cooled to 0-10 ℃ by the air cooling device, and then the compressed air is cooled aiming at the thick and large thermal junction part in the shell, so that the condensation speed of the alloy material injected into the part is accelerated, and the difference of the condensation speed of the alloy material in each area in the shell is reduced, thereby preventing the defects of overheating shrinkage cavity and porosity at the local position, laying a foundation for improving the molding quality of the casting, being beneficial to improving the qualification rate of the finished casting, avoiding or reducing the frequency of repairing and processing the casting at the later stage, and reducing the labor intensity of workers.
Claims (8)
1. An investment casting molding method is characterized in that: the method comprises the following steps:
preparing a wax pattern according to a design drawing, firstly coating a plurality of layers of refractory materials on the outer surface of the wax pattern, roasting the refractory materials, melting and removing the wax pattern to obtain a shell, then pouring and smelting alloy materials in a liquid state into the shell, providing an air compressor and an air cooling device, cooling compressed air generated by the air compressor by the air cooler, then, aligning to a thick and large thermal node part in the shell for cooling, and obtaining a casting after the alloy materials are solidified.
2. The method of investment casting molding of claim 1 wherein: the alloy material is aluminum alloy or magnesium alloy.
3. The method of investment casting molding of claim 1 wherein: the temperature of the compressed air after being cooled by the air cooling device is 0-10 ℃.
4. The method of investment casting molding of claim 1 wherein: air cooling device includes refrigerator-freezer (1), water tank (2) and heat exchange tube (3), and place in refrigerator-freezer (1) water tank (2), and the splendid attire has clear water in water tank (2), and heat exchange tube (3) submergence is in the clear water and its both ends stretch out refrigerator-freezer (1) respectively outside, the one end of heat exchange tube (3) as air inlet (4) and be used for with the air compressor machine output intercommunication, the other end of heat exchange tube (3) is as gas outlet (5) and be used for aiming at thick big thermal-junction position cools off in the shell.
5. The method of investment casting molding of claim 4 wherein: the heat exchange tubes (3) are arranged in a convoluted and coiled manner with the center of the water tank (2) as a convolution center and are arranged in a circuitous manner on the left side and the right side or the front side and the rear side of the water tank (2) along the direction from top to bottom.
6. The method of investment casting molding of claim 4 wherein: and a plug (6) is also arranged at the air inlet (4) or the air outlet (5).
7. The method of investment casting molding of claim 4 wherein: the heat exchange tube (3) is made of a galvanized iron tube.
8. The method of investment casting molding of claim 1 wherein: the water tank (2) is made of a steel plate with the thickness not less than 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110908205.XA CN113600752A (en) | 2021-08-09 | 2021-08-09 | Investment casting molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110908205.XA CN113600752A (en) | 2021-08-09 | 2021-08-09 | Investment casting molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113600752A true CN113600752A (en) | 2021-11-05 |
Family
ID=78339965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110908205.XA Pending CN113600752A (en) | 2021-08-09 | 2021-08-09 | Investment casting molding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113600752A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750499A (en) * | 2016-04-21 | 2016-07-13 | 清华大学 | Method of utilizing conformal cold iron and forced convection to locally cool investment casting |
| CN206169178U (en) * | 2016-11-09 | 2017-05-17 | 安徽应流集团霍山铸造有限公司 | Fired mold is heat sink for precision casting |
| CN110961577A (en) * | 2019-12-24 | 2020-04-07 | 陕西宏远航空锻造有限责任公司 | Method for solving shrinkage porosity of investment casting aluminum alloy casting |
| CN213858365U (en) * | 2020-11-18 | 2021-08-03 | 天津昊宇创智精密机械有限公司 | Cooling device for machining |
| CN213906553U (en) * | 2021-01-04 | 2021-08-06 | 深圳市佑金自动化设备有限公司 | Frequency converter cooling device |
-
2021
- 2021-08-09 CN CN202110908205.XA patent/CN113600752A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750499A (en) * | 2016-04-21 | 2016-07-13 | 清华大学 | Method of utilizing conformal cold iron and forced convection to locally cool investment casting |
| CN206169178U (en) * | 2016-11-09 | 2017-05-17 | 安徽应流集团霍山铸造有限公司 | Fired mold is heat sink for precision casting |
| CN110961577A (en) * | 2019-12-24 | 2020-04-07 | 陕西宏远航空锻造有限责任公司 | Method for solving shrinkage porosity of investment casting aluminum alloy casting |
| CN213858365U (en) * | 2020-11-18 | 2021-08-03 | 天津昊宇创智精密机械有限公司 | Cooling device for machining |
| CN213906553U (en) * | 2021-01-04 | 2021-08-06 | 深圳市佑金自动化设备有限公司 | Frequency converter cooling device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20211105 |