CN117428152A - Forming process of complex ceramic core for casting - Google Patents
Forming process of complex ceramic core for casting Download PDFInfo
- Publication number
- CN117428152A CN117428152A CN202311381409.8A CN202311381409A CN117428152A CN 117428152 A CN117428152 A CN 117428152A CN 202311381409 A CN202311381409 A CN 202311381409A CN 117428152 A CN117428152 A CN 117428152A
- Authority
- CN
- China
- Prior art keywords
- ceramic core
- core part
- gasket
- casting
- complex
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 131
- 238000005266 casting Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 238000012797 qualification Methods 0.000 abstract description 4
- 238000002679 ablation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/101—Permanent cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The application discloses a molding process of complex ceramic core for casting, comprising the following steps: and installing a gasket which can be removed by high-temperature melting between the ceramic core part A and the ceramic core part B which are respectively pressed and formed, and forming the integral ceramic core after removing the gasket by high-temperature melting. And (3) preparing a ceramic core part B on the ceramic core part A to obtain a ceramic core formed by the ceramic core part A with the gasket and the ceramic core part B, removing the ceramic core by sintering the ceramic core to remove the gasket through high-temperature ablation, obtaining the ceramic core with a complex structure formed by integrally sintering the ceramic core part A and the ceramic core part B, solving the problem that the two independent ceramic core parts A and the ceramic core part B are mutually matched to obtain the ceramic core when the ceramic core is used in a later stage, and the problem that the size precision of an inner cavity is low after casting is solved, so that the qualification rate is affected.
Description
Technical Field
The invention relates to a molding process of a complex ceramic core for casting, and belongs to the technical field of casting core processes.
Background
The inner cavity of the casting is formed by adopting the ceramic core in the production of the casting, and the ceramic core 7 is complicated in structure, see fig. 6 and cannot be integrally manufactured and formed, so that the ceramic core used in the production adopts a splicing structure, see fig. 7, and the two independent ceramic core parts A71 and B72 are mutually matched, so that the problem that the dimensional accuracy of the inner cavity of the cast casting is low and the qualification rate is affected is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a molding process of a complex ceramic core for casting.
The invention is realized by the following technical scheme.
The invention provides a molding process of a complex ceramic core for casting, which comprises the following steps:
and installing a gasket which can be removed by high-temperature melting between the ceramic core part A and the ceramic core part B which are respectively pressed and formed, and forming the integral ceramic core after removing the gasket by high-temperature melting.
The molding process specifically comprises five steps of ceramic core part A molding, gasket placement, ceramic core part B molding, coring and sintering which are sequentially carried out.
The ceramic core part A is formed by the following steps: the upper die A and the lower die are tightly covered to form a ceramic core part A of the ceramic core.
The gasket placing step comprises the following steps: the shims were mounted in the manufactured ceramic core section a.
In the gasket placement step, the gasket is a wax material.
The ceramic core part B forming step comprises the following steps: the upper die B and the lower die are tightly covered to form a ceramic core part B of the ceramic core.
The coring step is as follows: the ceramic core part B and the ceramic core part A form a ceramic core to be taken down from the lower die, a gasket interval is arranged at a casting forming space of the later casting between the ceramic core part B and the ceramic core part A, and other parts are connected.
The sintering step is as follows: and sintering the ceramic core formed by the pressed ceramic core part B and the ceramic core part A, and melting and removing the gasket at high temperature to obtain the ceramic core.
The invention has the beneficial effects that: and (3) preparing a ceramic core part B on the ceramic core part A to obtain a ceramic core formed by the ceramic core part A with the gasket and the ceramic core part B, removing the ceramic core by sintering the ceramic core to remove the gasket through high-temperature ablation, obtaining the ceramic core with a complex structure formed by integrally sintering the ceramic core part A and the ceramic core part B, solving the problem that the two independent ceramic core parts A and the ceramic core part B are mutually matched to obtain the ceramic core when the ceramic core is used in a later stage, and the problem that the size precision of an inner cavity is low after casting is solved, so that the qualification rate is affected.
Drawings
FIG. 1 is a schematic view of the structure of a ceramic core portion A of the present invention at the time of press molding;
FIG. 2 is a schematic view showing the structure of the ceramic core portion A of the present invention when the mounting pad is press-molded;
FIG. 3 is a schematic view of the structure of the gasket of the present invention;
FIG. 4 is a schematic view showing the structure of the ceramic core part B of the present invention when the mounting pad is press-molded;
FIG. 5 is a schematic view showing the structure of the ceramic core part A, the gasket and the ceramic core part B of the present invention when they are pressed and molded;
FIG. 6 is a schematic view of the structure of the ceramic core of the present invention;
FIG. 7 shows a prior art ceramic core part A and ceramic core part B installation
Schematic structural diagram of ceramic core;
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
The molding process of the complex ceramic core for casting comprises the following steps of:
s1, ceramic core part A71 is molded: the upper die a21 is closely pressed with the lower die 1 to form a ceramic core portion a71 of the ceramic core 7 as shown in fig. 1.
S2, gasket placement: the gasket 3 made of high-temperature removable organic material is installed in the manufactured ceramic core portion a71, the gasket 3 is made of wax material, and the gasket 3 has the same casting structure as the later casting, as shown in fig. 2 and 3.
S3, ceramic core part B72 is molded: the upper die B22 is closely pressed with the lower die 1 to form a ceramic core portion B72 of the ceramic core 7, as shown in fig. 4.
S4, coring: the ceramic core part B72 and the ceramic core part A71 form the ceramic core 7 which is removed from the lower die 1, a spacer 3 is arranged between the ceramic core part B72 and the ceramic core part A71 at the casting forming space of the later casting, and other parts are connected as shown in figure 5.
S5, sintering: the ceramic core 7 formed by the pressed ceramic core portion B72 and the ceramic core portion a71 is sintered, and the gasket 3 is melted and removed at a high temperature to obtain the ceramic core 7, as shown in fig. 6.
The ceramic core 7 adopts the ceramic core part A71 to be molded firstly, then the gasket 3 which can be ablated at high temperature is installed, after occupying the casting molding space of the later casting, the ceramic core part B72 is manufactured on the ceramic core part A71, the ceramic core 7 which is formed by the ceramic core part A71 with the gasket 3 and the ceramic core part B72 is obtained, the ceramic core 7 is ablated and removed at high temperature by sintering the gasket 3, the ceramic core 7 which is formed by integrally sintering the ceramic core part A71 and the ceramic core part B72 is obtained, and when the later casting is used, the ceramic core 7 is obtained by mutually matching the two independent ceramic core parts A71 and the ceramic core part B72, and the problem that the size accuracy is low and the qualification rate is affected exists in the inner cavity after casting.
Claims (8)
1. A process for forming a complex ceramic core for casting, comprising:
a gasket (3) which can be removed by high-temperature melting is arranged between a ceramic core part A (71) and a ceramic core part B (72) which are respectively pressed and molded, and the gasket (3) is removed by high-temperature melting to form the molding process of the integrated ceramic core (7).
2. The molding process of the complex ceramic core for casting according to claim 1, wherein the molding process specifically comprises five steps of molding the ceramic core portion a (71), placing a gasket, molding the ceramic core portion B (72), coring and sintering, which are sequentially performed.
3. A process for forming a complex ceramic core for casting according to claim 2, characterized in that the ceramic core portion a (71) is formed by the steps of: the upper die A (21) and the lower die (1) are tightly covered and pressed to form a ceramic core part A (71) of the ceramic core (7).
4. The molding process of the complex ceramic core for casting according to claim 2, wherein the gasket insertion step is: the gasket (3) is mounted in the manufactured ceramic core part a (71).
5. A process for forming a complex ceramic core for casting according to claim 4, characterized in that in the gasket insertion step, the gasket (3) is a wax material.
6. A process for forming a complex ceramic core for casting according to claim 2, characterized in that said ceramic core portion B (72) forming step comprises: the upper die B (22) and the lower die (1) are tightly covered and pressed to form a ceramic core part B (72) of the ceramic core (7).
7. The molding process of a complex ceramic core for casting according to claim 2, wherein the coring step is: the ceramic core part B (72) and the ceramic core part A (71) form a ceramic core (7) to be taken down from the lower die (1), a gasket (3) is arranged at a casting forming space of a later casting between the ceramic core part B (72) and the ceramic core part A (71), and other parts are connected.
8. The molding process of the complex ceramic core for casting according to claim 2, wherein the sintering step is: sintering the ceramic core (7) formed by the pressed ceramic core part B (72) and the ceramic core part A (71), and melting and removing the gasket (3) at high temperature to obtain the ceramic core (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311381409.8A CN117428152A (en) | 2023-10-24 | 2023-10-24 | Forming process of complex ceramic core for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311381409.8A CN117428152A (en) | 2023-10-24 | 2023-10-24 | Forming process of complex ceramic core for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117428152A true CN117428152A (en) | 2024-01-23 |
Family
ID=89557754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311381409.8A Pending CN117428152A (en) | 2023-10-24 | 2023-10-24 | Forming process of complex ceramic core for casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117428152A (en) |
-
2023
- 2023-10-24 CN CN202311381409.8A patent/CN117428152A/en active Pending
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