A ring part integral mold

Abstract

The application discloses a ring-shaped part integral mold, belongs to the technical field of aero-engines, and is used for machining a compressor casing. The compressor casing comprises an inner ring, an outer ring, and a hollow support plate connecting the inner ring and the outer ring. The ring-shaped part integral mold comprises a movable block assembly, a bottom plate 300, and a mold locking assembly 100. The movable block assembly is arranged on the bottom plate 300, and the mold locking assembly 100 is used for cooperating with the bottom plate 300 to compress the movable block assembly. The movable block assembly comprises an inner ring movable block assembly 400 and an outer ring movable block assembly 500. The inner ring movable block assembly 400 is arranged around the outer ring movable block assembly 500, and a gap between the two forms an inner ring forming cavity used for forming the inner ring. The side, away from the inner ring movable block assembly 400, of the outer ring movable block assembly 500 and the mold locking assembly 100 form an outer ring forming cavity used for forming the outer ring. The ring-shaped part integral mold further comprises a ceramic core 9 used for forming a connecting rib. The application can solve the problems of too many types and quantities of movable blocks of the integral mold and low disassembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular, to an integral mold for a ring-shaped part. Background Technology

[0002] In the field of aero-engine technology, many parts are precision cast and require mold processing. Ring-shaped parts, especially those with multi-ring structures and hollow connecting parts, are particularly difficult to manufacture due to their complex structure. A typical example is the compressor casing, whose structure is shown in the attached manual. Figure 2 As shown, it includes an inner ring, an outer ring, and a hollow support plate connecting the inner and outer rings. The two openings of the outer ring of the hollow support plate are extremely difficult to process due to the presence of connecting ribs.

[0003] For ring-shaped parts, the traditional process is to use unit wax molds to assemble molds for processing. However, the assembled molds have problems such as unstable wax mold dimensions. Therefore, integral wax molds have begun to emerge.

[0004] However, for ring-shaped parts such as compressor casings, the existing integral wax molds present many problems due to their complex structure. The integral wax mold structure is more complex than the unit wax mold pressing process, requiring the disassembly of more numerous and varied cavity blocks, leading to difficulties in mold closing and opening, and cumbersome operations. Particularly for complex parts like compressor casings, which have hollow support plates with connecting ribs, machining the internal structure is a major challenge. Therefore, a redesign and optimization of the mold is necessary, and the design process must fully consider how to disassemble the blocks more rationally and simplify operations. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an integral mold for ring-shaped parts, which solves the problems of complex and numerous movable blocks in integral molds and low disassembly efficiency. It can be widely applied to multi-ring-shaped parts with connecting parts, such as compressor casings.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: an integral mold for an annular part, used for processing a compressor casing, the compressor casing including an inner ring, an outer ring, and a hollow support plate connecting the inner ring and the outer ring, the hollow support plate being provided with multiple hollow support plates around the inner ring, and at least some of the hollow support plates having connecting ribs at the openings facing the outer ring; the integral mold for the annular part includes a movable block assembly, a base plate, and a mold locking assembly, the movable block assembly being arranged on the base plate, and the mold locking assembly being used to cooperate with the base plate to press the movable block assembly; The clutch assembly includes an inner clutch assembly and an outer clutch assembly: The inner ring movable block assembly is arranged around the outer ring movable block assembly, and the gap between the inner ring movable block assembly and the outer ring movable block assembly forms an inner ring forming cavity, which is used to form the inner ring; The outer ring movable block assembly, on the side away from the inner ring movable block assembly, is enclosed by the locking assembly to form an outer ring forming cavity, which is used to form the outer ring; The integral mold for the ring-shaped part also includes a ceramic core, which is disposed at the limiting holes of the outer ring movable block assembly and the inner ring movable block assembly for forming the connecting rib.

[0007] Furthermore, the integral mold for the annular part also includes an inner support and a rod. The inner support is disposed on the base plate and is used to support and limit the inner ring movable block assembly. The rod is used to cooperate with the inner support to lift and remove the inner support.

[0008] Furthermore, the bottom end of the rod is provided with an external thread, the inner support is a conical cylinder structure, and the bottom plate of the inner support is provided with a threaded hole for threaded engagement with the rod.

[0009] Furthermore, the mold-locking assembly also includes outer mold blocks arranged in a ring array. The outer ring movable block assembly includes a first outer ring movable block, a second outer ring movable block, and a third outer ring movable block arranged in a ring array sequentially inside the outer mold blocks. The outer mold blocks are connected to the base plate and are used to press and limit the first outer ring movable block, the second outer ring movable block, and the third outer ring movable block. The side walls of the first outer ring movable block and the second outer ring movable block are provided with limiting grooves. The limiting grooves on the side walls of adjacent first outer ring movable blocks and second outer ring movable blocks are spliced ​​to form an outer ring limiting hole. The outer ring limiting hole is used to limit the ceramic core.

[0010] Furthermore, the outer mold block is provided with a wax injection channel that is connected to an external wax injection pipe. The wax injection channel is located in the outer mold block and has a diversion channel. The diversion channel is connected to a pre-set patch forming cavity in the outer mold block. The patch forming cavity is used to form a patch.

[0011] Furthermore, the locking mold assembly includes an upper cover plate and a locking mold frame. The locking mold frame is used to fit over the outer mold block and press the outer mold block. The locking mold frame is connected to the base plate through a connecting block. The upper cover plate is located at the top of the locking mold frame and is used to press and limit the movable block assembly.

[0012] Furthermore, the inner ring movable block assembly includes a cylindrical second inner ring movable block and a plurality of first inner ring movable blocks arranged in a ring array. The first inner ring movable blocks are engaged with the top of the second inner ring movable blocks. Limiting grooves are formed at the bottom of the first inner ring movable blocks and the top of the second inner ring movable blocks. The limiting grooves at the bottom of the first inner ring movable blocks and the second inner ring movable blocks are spliced ​​together to form a core limiting hole. The core limiting hole is used to limit the ceramic core.

[0013] Furthermore, the bottom of the first inner ring movable block is provided with a positioning boss for pressing and limiting the ceramic core.

[0014] Furthermore, the ceramic core has a connecting rib forming hole for forming the connecting rib. The ceramic core includes a T-shaped positioning block and a core positioning block, which are connected to each other. The core positioning block is inserted into the outer ring limiting hole and the core limiting hole in sequence. The T-shaped positioning block cooperates with the preset limiting cavity on the outer mold block.

[0015] Furthermore, the first end of the core positioning block is connected to the T-shaped positioning block, and the second end of the core positioning block is provided with a limiting groove, which cooperates with the positioning boss at the bottom of the first inner ring movable block.

[0016] The beneficial effects of this invention are: To address the issues of traditional ring-shaped parts having more complex integral mold structures than unit wax mold molding, requiring more disassembly of cavity blocks, and involving more complicated operations, this invention targets multi-ring structure ring parts, especially those with hollow support plates connecting the inner and outer rings, such as compressor casings. The integral mold is designed into three main parts, with a base plate and mold-locking assembly providing support and limiting. Three types of movable block assemblies are used to complete the forming of the gas generator: an inner ring movable block assembly, an outer ring movable block assembly, and a mold-locking assembly. These three movable block assemblies are arranged from the inside out, making the overall structure clearer and easier to mark, classify, install, and disassemble.

[0017] The inner and outer ring movable components can be understood as being located on both sides of the inner ring and used to form the inner ring, while the outer ring movable component is used to cooperate with the clamping component to form the outer ring. The movable components do not work independently but can be used in conjunction with each other, thereby reducing the number of individual movable types and achieving a more compact structure.

[0018] In addition, the hollow support plate of the compressor casing has a connecting rib structure that is difficult to process. This structure is achieved by using a ceramic core. The ceramic core is located at the limiting holes of the outer ring movable block assembly and the inner ring movable block assembly. The connecting rib is formed simultaneously with the wax injection molding of the hollow support plate, which can complete the overall processing operation conveniently and quickly without the need to use too many types of movable blocks.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all the advantages described above simultaneously. In addition to the objectives, features, and advantages described above, this invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the compressor casing used for processing by the mold of the present invention.

[0021] Figure 3 This is a schematic diagram of the compressor casing and ceramic core assembly.

[0022] Figure 4 This is a schematic diagram of the structure of the preferred embodiment of the present invention after concealing the top cover plate and part of the locking frame.

[0023] Figure 5 This is a schematic diagram of the structure after the mold-locking component is hidden in a preferred embodiment of the present invention.

[0024] Figure 6 This is a structural schematic diagram of the inner ring movable block assembly in a preferred embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the ceramic core and the inner ring movable block assembly in a preferred embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of the ceramic core according to a preferred embodiment of the present invention.

[0027] Legend: 100, Mold clamping assembly; 101, Top cover plate; 102, Mold clamping frame; 200, Outer mold block; 201, Diversion channel; 300, Base plate; 400, Inner ring movable block assembly; 401, First inner ring movable block; 402, Second inner ring movable block; 4021, Limiting boss; 403, Core limiting hole; 500, Outer ring movable block assembly; 501, First outer ring movable block; 502, Second outer ring movable block; 503, Third outer ring movable block; 600, Inner support; 700, Rod; 800, Patch; 9, Ceramic core; 901, T-shaped positioning block; 902, Core positioning block; 903, Limiting groove; 904, Connecting rib forming hole; 10, Wax injection tube. Detailed Implementation

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0029] An integral mold for a ring-shaped part is provided for processing a compressor casing. The compressor casing includes an inner ring, an outer ring, and a hollow support plate connecting the inner ring and the outer ring. Multiple hollow support plates are provided around the inner ring, and at least some of the hollow support plates have connecting ribs at their openings facing the outer ring. The integral mold for the ring-shaped part includes a movable block assembly, a base plate 300, and a mold locking assembly 100. The movable block assembly is arranged on the base plate 300, and the mold locking assembly 100 is used to cooperate with the base plate 300 to press the movable block assembly. The clutch assembly includes an inner clutch assembly 400 and an outer clutch assembly 500: The inner ring movable block assembly 400 is arranged around the outer ring movable block assembly 500, and the gap between the inner ring movable block assembly 400 and the outer ring movable block assembly 500 forms an inner ring forming cavity, which is used to form the inner ring. The outer ring movable block assembly 500, on the side away from the inner ring movable block assembly 400, forms an outer ring forming cavity with the mold locking assembly 100, and the outer ring forming cavity is used to form the outer ring; The integral mold for the ring-shaped part also includes a ceramic core 9, which is disposed at the limiting holes of the outer ring movable block assembly 500 and the inner ring movable block assembly 400 for forming the connecting rib.

[0030] This invention targets multi-ring structure annular parts, particularly hollow support plates with connecting parts between the inner and outer rings, such as compressor casings. The overall mold is designed as three main parts, with a base plate 300 and a mold-locking assembly 100 providing support and positioning. Three types of movable block assemblies are used to complete the forming of the gas generator: an inner ring movable block assembly 400, an outer ring movable block assembly 500, and a mold-locking assembly 100. These three movable block assemblies are arranged from the inside out, making the overall structure clearer and easier to label, classify, install, and disassemble. The inner ring movable block assembly 400 and the outer ring movable block assembly 500 can be understood as being located on both sides of the inner ring and used to form the inner ring. The outer ring movable block assembly 500 also cooperates with the mold-locking assembly 100 to form the outer ring. The individual piston components do not work independently but can be used in conjunction with each other. For example, the locking component 100 can both press the piston components from the outer ring and form the outer ring forming cavity. By using one piston component for multiple purposes, the types and number of pistons can be reduced, resulting in a more compact structure. Meanwhile, the hollow support plate of the compressor casing has a connecting rib structure that is difficult to process. This is achieved using a ceramic core 9. The ceramic core 9 is located at the limiting holes of the outer ring piston component 500 and the inner ring piston component 400. The connecting rib is formed simultaneously with the wax injection molding of the hollow support plate, allowing for convenient and quick completion of the overall processing operation without the need for numerous types of pistons.

[0031] Preferably, please refer to Figure 4 , 5 As shown, the overall mold for the annular part also includes an inner support 600 and a rod 700. The inner support 600 is disposed on the base plate 300 and is used to support and limit the inner ring movable block assembly 400. The rod 700 is used to cooperate with the inner support 600 to lift and remove the inner support 600.

[0032] Understandably, the inner support member 600 is located at the very center of the base plate 300, serving to press and limit the inner ring movable block assembly 400 from the inside. Together with the base plate 300 and the mold-locking assembly 100, it strengthens the pressing and limiting of the movable block assembly. Since the inner support member 600 is compressed from all sides by the inner ring movable block assembly 400, it can be removed using the rod 700 to facilitate disassembly.

[0033] Preferably, please refer to Figure 4 , 5 As shown, the bottom end of the rod 700 is provided with an external thread, the inner support 600 is a conical cylinder structure, and the bottom plate of the inner support 600 is provided with a threaded hole for threaded engagement with the rod 700.

[0034] Understandably, the conical inner support 600 is designed to facilitate the clamping of the inner ring movable block assembly 400. Its cross-section is wider at the top and narrower at the bottom, meaning the outer wall of the inner support 600 is inclined. However, this also makes the inner support 600 difficult to remove. Therefore, a screw hole is made on the bottom plate of the inner support 600 to engage with the threaded bottom of the rod 700. The rod 700 can use a T-shaped screw for easy manual operation.

[0035] It should be noted that the screw holes on the base plate of the inner support 600 can be through holes. In this case, as the rod 700 is continuously screwed downwards, similar to the principle of a lead screw and nut, the inner support 600 can be lifted. After loosening the inner support 600, it is easy to manually remove the inner support 600.

[0036] Preferably, please refer to Figure 1 , 4 As shown, the locking mold assembly 100 includes an upper cover plate 101 and a locking mold frame 102. The locking mold frame 102 is used to fit over the outer mold block 200 and press the outer mold block 200. The locking mold frame 102 is connected to the base plate 300 through a connecting block. The upper cover plate 101 is located at the top of the locking mold frame 102 and is used to press and limit the movable block assembly.

[0037] In a preferred embodiment of the present invention, please refer to Figure 4 , 5 As shown, the mold locking assembly 100 further includes an outer mold block 200 arranged in a ring array. The outer ring movable block assembly 500 includes a first outer ring movable block 501, a second outer ring movable block 502, and a third outer ring movable block 503 arranged in a ring array inside the outer mold block 200. The outer mold block 200 is connected to the base plate 300 and is used to press and limit the first outer ring movable block 501, the second outer ring movable block 502, and the third outer ring movable block 503. The side walls of the first outer ring movable block 501 and the second outer ring movable block 502 are provided with limiting grooves. The limiting grooves on the side walls of adjacent first outer ring movable blocks 501 and second outer ring movable blocks 502 are spliced ​​to form an outer ring limiting hole. The outer ring limiting hole is used to limit the ceramic core 9.

[0038] Understandably, in order to enhance the stability of the outer ring movable block assembly 500, the outer outer ring movable blocks 501, 502 and 503 are pressed and limited by the outer mold block 200. The outer mold block 200 can have a large area of ​​groove, which can reduce the weight of the outer mold block 200 and can also cooperate with the locking frame 102 of the locking mold assembly 100 for limiting installation.

[0039] Preferably, please refer to Figure 4As shown, the outer mold block 200 is provided with a wax injection channel that is connected to the external wax injection pipe 10. The wax injection channel is located in the outer mold block 200 and has a diversion channel 201. The diversion channel 201 is connected to a pre-set patch forming cavity in the outer mold block 200. The patch forming cavity is used to form patch 800.

[0040] It should be noted that the patch 800 can be used for shaping blank products. Usually, the parts required for shaping products need to be made with additional molds. However, this invention opens a patch forming cavity on the outer mold block 200, which is easily detachable on the outside and through which the wax injection channel flows. The patch forming cavity is connected to the wax injection channel through the diversion channel 201. This allows various required patches 800 to be formed in the outer mold block 200, which helps to save a lot of mold opening costs and further improves the functional value of the outer mold block 200.

[0041] Preferably, please refer to Figure 4 , 6 As shown in Figure 7, the inner ring movable block assembly 400 includes a cylindrical second inner ring movable block 402 and a plurality of first inner ring movable blocks 401 arranged in a ring array. The first inner ring movable blocks 401 are snapped onto the top of the second inner ring movable block 402. Limiting grooves are formed at the bottom of the first inner ring movable block 401 and the top of the second inner ring movable block 402. The limiting grooves at the bottom of the first inner ring movable block 401 and the second inner ring movable block 402 are spliced ​​to form a core limiting hole 403. The core limiting hole 403 is used to limit the ceramic core 9.

[0042] Understandably, the cylindrical second inner ring movable block 402 has better overall stability and can provide good support for the first inner ring movable block 401 at its bottom. The first inner ring movable block 401 is a ring-shaped arrangement of movable blocks, which facilitates disassembly and, together with the second inner ring movable block 402, forms the core limiting hole 403 to limit the ceramic core 9.

[0043] Preferably, please refer to Figure 4 , 6As shown in Figures 7 and 8, the bottom of the first inner ring movable block 401 is provided with a positioning boss for pressing and limiting the ceramic core 9. In a preferred embodiment of the present invention, the ceramic core 9 is provided with a connecting rib forming hole 904 for forming the connecting rib. The ceramic core 9 includes a T-shaped positioning block 901 and a core positioning block 902, which are connected to each other. The core positioning block 902 is inserted into the outer ring limiting hole and the core limiting hole 403 in sequence. The T-shaped positioning block 901 cooperates with the preset limiting cavity on the outer mold segment 200. In a preferred embodiment of the present invention, the first end of the core positioning block 902 is connected to the T-shaped positioning block 901, and the second end of the core positioning block 902 is provided with a limiting groove 903. The limiting groove 903 cooperates with the positioning boss at the bottom of the first inner ring movable block 401. It should be noted that, in order to facilitate filling and ensure molding quality, the wax injection tube 10 of this invention is set on the outer cylindrical surface at the lower end of the wax mold of the compressor box, which determines that the wax material is filled from bottom to top. In this process, due to the installation structure of the ceramic core 9, the T-shaped positioning block 901 of the ceramic core 9 is limited by the outer mold block 200 to become the positioning end. After the core positioning block 902 is inserted into the core limiting hole 403, due to the existence of the mold fitting clearance, it can be understood that the outermost end of the core positioning block 902 is a free end (not limited by interference). This free end will shift upward under the impact pressure of wax filling, and the left and right positions will also shift due to the filling pressure of the wax material, resulting in a large difference in the wall thickness of the hollow support plate, which cannot guarantee the wall thickness requirements of the support plate.

[0044] To address the issue of unstable positioning of the ceramic core 9, which leads to excessive thickness tolerances in the support plate, the first inner ring movable block 401 of this invention is provided with a positioning boss at its bottom to press and limit the free end of the front end of the core positioning block 902, thereby preventing the free end of the core from shifting during the filling process. It should be noted that due to the positioning boss at the bottom of the first inner ring movable block 401, a gap will be formed at the top of the hollow support plate after the corresponding compressor casing wax mold is formed. Therefore, a matching patch is needed. The outer mold block 200 of this invention can additionally form a patch 800, which can be used to fill the gap at the bottom of the hollow support plate.

[0045] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] This document describes the principles and implementation methods of the present invention. The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A ring-shaped integral mold for machining a compressor casing, the compressor casing comprising an inner ring, an outer ring, and a hollow support plate connecting the inner ring and the outer ring, wherein multiple hollow support plates are arranged around the inner ring, and at least a portion of the hollow support plates have connecting ribs at their openings facing the outer ring, characterized in that... The integral mold for the ring-shaped part includes a movable block assembly, a base plate (300), and a mold locking assembly (100). The movable block assembly is arranged on the base plate (300), and the mold locking assembly (100) is used to cooperate with the base plate (300) to press the movable block assembly. The clutch assembly includes an inner clutch assembly (400) and an outer clutch assembly (500): The inner ring movable block assembly (400) is arranged around the outer ring movable block assembly (500), and the gap between the inner ring movable block assembly (400) and the outer ring movable block assembly (500) forms an inner ring forming cavity, which is used to form the inner ring; The outer ring movable block assembly (500) is located away from the inner ring movable block assembly (400) and is enclosed by the mold locking assembly (100) to form an outer ring forming cavity, which is used to form the outer ring; The integral mold for the ring-shaped part also includes a ceramic core (9), which is located at the limiting holes of the outer ring movable block assembly (500) and the inner ring movable block assembly (400) for forming the connecting rib; The mold locking assembly (100) includes an outer mold block (200) arranged in a ring array. The outer ring movable block assembly (500) includes a first outer ring movable block (501), a second outer ring movable block (502), and a third outer ring movable block (503) arranged in a ring array inside the outer mold block (200). The outer mold block (200) is connected to the base plate (300) and is used to press and limit the first outer ring movable block (501), the second outer ring movable block (502), and the third outer ring movable block (503). The side walls of the first outer ring movable block (501) and the second outer ring movable block (502) are provided with limiting grooves. The limiting grooves on the side walls of adjacent first outer ring movable blocks (501) and second outer ring movable blocks (502) are spliced ​​to form an outer ring limiting hole. The outer ring limiting hole is used to limit the ceramic core (9).

2. The integral mold for a ring-shaped part according to claim 1, characterized in that, The ring-shaped part mold also includes an inner support (600) and a rod (700). The inner support (600) is disposed on the base plate (300) and is used to support and limit the inner ring movable block assembly (400). The rod (700) is used to cooperate with the inner support (600) to lift and remove the inner support (600).

3. The integral mold for a ring-shaped part according to claim 2, characterized in that, The bottom end of the rod (700) is provided with an external thread, the inner support (600) is a conical cylinder structure, and the bottom plate of the inner support (600) is provided with a screw hole for threaded engagement with the rod (700).

4. The integral mold for a ring-shaped part according to claim 1, characterized in that, The outer mold block (200) is provided with a wax injection channel that is connected to an external wax injection pipe (10). The wax injection channel is located in the outer mold block (200) and has a diversion channel (201). The diversion channel (201) is connected to a pre-set patch forming cavity in the outer mold block (200). The patch forming cavity is used to form a patch (800).

5. The integral mold for a ring-shaped part according to claim 1, characterized in that, The locking mold assembly (100) further includes an upper cover plate (101) and a locking mold frame (102). The locking mold frame (102) is used to fit over the outer mold block (200) and press the outer mold block (200). The locking mold frame (102) is connected to the base plate (300) through a connecting block. The upper cover plate (101) is located at the top of the locking mold frame (102) and is used to press and limit the movable block assembly.

6. The integral mold for a ring-shaped part according to claim 1, characterized in that, The inner ring movable block assembly (400) includes a cylindrical second inner ring movable block (402) and a plurality of first inner ring movable blocks (401) arranged in a ring array. The first inner ring movable blocks (401) are snapped onto the top of the second inner ring movable block (402). Limiting grooves are provided at the bottom of the first inner ring movable block (401) and the top of the second inner ring movable block (402). The limiting grooves of the bottom of the first inner ring movable block (401) and the second inner ring movable block (402) are spliced ​​to form a core limiting hole (403). The core limiting hole (403) is used to limit the ceramic core (9).

7. The integral mold for a ring-shaped part according to claim 6, characterized in that, The bottom of the first inner ring movable block (401) is provided with a positioning boss for pressing and limiting the ceramic core (9).

8. The integral mold for a ring-shaped part according to claim 7, characterized in that, The ceramic core (9) has a connecting rib forming hole (904) for forming the connecting rib. The ceramic core (9) includes a T-shaped positioning block (901) and a core positioning block (902). The T-shaped positioning block (901) and the core positioning block (902) are connected to each other. The core positioning block (902) is inserted into the outer ring limiting hole and the core limiting hole (403) in sequence. The T-shaped positioning block (901) cooperates with the preset limiting cavity on the outer mold block (200).

9. A ring-shaped integral mold according to claim 8, characterized in that, The first end of the core positioning block (902) is connected to the T-shaped positioning block (901), and the second end of the core positioning block (902) is provided with a limiting groove (903), which cooperates with the positioning boss at the bottom of the first inner ring movable block (401).

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