Carbon-carbon crucible support needling preform mold

Abstract

The utility model relates to a carbon-carbon crucible support needling preform mold which comprises a molding table and a support assembly, the molding table comprises a platform part and a curved surface part, the platform part is arranged on the curved surface part, the platform part and the curved surface part independently adhere and wrap a thermal shrinkage film, and the support assembly is arranged on the molding table. The wood mold has the effects of improving the quality of the wood mold bonded with the thermal shrinkage film and keeping the mold precision.

Description

Technical Field

[0001] This application relates to the field of needle-punched preforms for crucibles, and particularly to a carbon-carbon crucible support needle-punched preform mold. Background Art

[0002] In the current mainstream preparation process of carbon-carbon crucible supports, it includes the preparation of carbon fiber crucible support preforms and hot pressing of the green bodies; the preparation method of carbon fiber crucible support preforms is basically profiling needle punching, which belongs to the category of needle punching of special-shaped parts, and requires corresponding shaped profiling molds. The accuracy requirements for the molds and auxiliary materials are relatively high. The mold preparation process usually includes the following steps: preparing the corresponding wooden mold according to the process requirements - preparing auxiliary materials (heat shrinkable film, glue, EVA foam) - cutting the heat shrinkable film and EVA foam into the required shapes - using a hot air gun and glue to paste the two layers of film to form the mold.

[0003] Existing molds generally include a wooden mold. The wooden mold includes a mold table and a support. The support and the mold table are generally integrally arranged. At the same time, when preparing the mold, heat shrinkable film and EVA foam need to be bonded to the wooden mold to complete the preparation of the mold. In addition, different crucible wooden molds have different mold tables to form preforms of different shapes.

[0004] In view of the above related technologies, when manufacturing the mold, the "concave" surface of the crucible mold makes it difficult for the heat shrinkable film to perfectly fit the surface of the wooden mold, which easily leads to the formation of voids at the junction of the plane and the curved surface, resulting in the inability of the mold to accurately simulate the inner surface of the product, causing excessive accuracy deviation or scrapping of the entire wooden mold. Summary of the Invention

[0005] In order to improve the quality of bonding the heat shrinkable film to the wooden mold and maintain the mold accuracy, this application provides a carbon-carbon crucible support needle-punched preform mold.

[0006] A carbon-carbon crucible support needle-punched preform mold provided by this application adopts the following technical solutions:

[0007] A carbon-carbon crucible support needle-punched preform mold includes a mold table and a support assembly. The mold table includes a platform part and a curved surface part. The platform part is arranged on the curved surface part. The platform part and the curved surface part are independently bonded and wrapped with heat shrinkable film. The support assembly is arranged on the mold table.

[0008] By adopting the above technical solution, when the mold base needs to be bonded with a heat-shrinkable film, the platform part and the curved surface part are independently wrapped with the heat-shrinkable film for bonding the heat-shrinkable mold respectively, so that the plane and the arc surface are independently wrapped by the heat-shrinkable mold. After the platform part and the curved surface part are respectively bonded and wrapped, the assembly of the platform part and the curved surface part is then carried out, thereby improving the covering property of the heat-shrinkable film on the wooden mold, reducing the wrapping gap of the heat-shrinkable film on the wooden mold, thus improving the mold accuracy, and solving the problem that when manufacturing the mold, the concave-shaped surface of the crucible support mold makes it difficult for the heat-shrinkable film to perfectly fit the surface of the wooden mold, which easily leads to the formation of voids at the junction of the plane and the curved surface, resulting in the inability of the mold to accurately simulate the inner surface of the product, causing excessive precision deviation or the scrapping of the entire wooden mold.

[0009] Optionally, a transition opening is provided at the transition position between the platform part and the curved surface part.

[0010] By adopting the above technical solution, the opening of the transition opening enables part of the heat-shrinkable mold bonded to the platform part and the curved surface part to be extruded to the transition opening when the platform part and the curved surface part are connected and combined, and then the heat-shrinkable mold extruded to the transition opening is polished, thereby ensuring a smooth transition of the heat-shrinkable mold between the platform part and the curved surface part, making the mold have better accuracy and better usability.

[0011] Optionally, a sunk groove is provided in the platform part, and the curved surface part passes through the sunk groove and is in abutting fit with the platform part.

[0012] By adopting the above technical solution, the setting of the sunk groove enables the curved surface part to pass through the sunk groove when the platform part and the curved surface part need to be combined, so that the sunk groove initially positions the position between the curved surface part and the platform part, thereby ensuring the accuracy of the position when the curved surface part and the platform part are assembled, making the mold have better accuracy and better usability.

[0013] Optionally, a through connection hole is provided in the platform part, and a connection convex block is fixedly provided on the curved surface part, and the connection convex block passes through and is in sliding fit with the connection hole.

[0014] By adopting the above technical solution, the setting of the connection hole further positions the assembly connection between the platform part and the curved surface part when the connection block of the platform part passes through the connection hole, thereby ensuring the accuracy of the position when the curved surface part and the platform part are assembled, making the mold have better accuracy and better usability.

[0015] Optionally, the bracket assembly includes a fixed seat and a plurality of fixing members. The fixed seat is provided with a plurality of fixing holes, and the plurality of fixing holes are uniformly distributed radially from the inside to the outside of the fixed seat. When the fixed seat is fixedly connected to the mold base, each fixing member passes through each fixing hole and is fixedly connected to the mold base.

[0016] By adopting the above technical solution, the opening of a number of fixing holes enables each fixing member to pass through the fixing holes at different distances from the middle position of the fixing seat when the fixing seat is fixedly connected to the mold tables of different sizes, so that the fixing seat is fixedly connected to the mold tables of different sizes, thereby making the support assembly applicable to wooden mold tables of various size types. Subsequently, only the mold table needs to be remade and replaced for different molds, which is beneficial to improving the mold accuracy and reducing the cost, and making the usability better.

[0017] Optionally, the support assembly further includes support columns, the support columns are fixedly arranged on the fixing seat, and the support columns are provided with a plurality of mounting holes, and each of the mounting holes is used for connecting with a needle punching machine.

[0018] By adopting the above technical solution, the arrangement of the mounting holes makes the fixed connection between the support column and the needle punching machine simpler and more convenient, and makes the usability better.

[0019] Optionally, the support assembly further includes a plurality of reinforcing ribs, one end of each reinforcing rib is fixedly connected to the fixing seat, and the other end of each reinforcing rib is fixedly connected to the support column.

[0020] By adopting the above technical solution, the arrangement of each reinforcing rib enables the support column to be supported by each reinforcing rib, so that the fixed connection stability between the support column and the fixing seat is better, and the usability is better.

[0021] Optionally, the fixing seat is provided with a plurality of through-going weight-reducing holes.

[0022] By adopting the above technical solution, the arrangement of each weight-reducing hole reduces the mass of the fixing disk and at the same time reduces the material use of the fixing disk, thereby reducing material waste and making the economy better.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the heat shrinkable film needs to be bonded to the mold table, the platform part and the curved surface part are respectively independently bonded and wrapped with the heat shrinkable film, so that the plane and the arc surface are independently wrapped by the heat shrinkable mold. After the platform part and the curved surface part are respectively bonded and wrapped, the assembly of the platform part and the curved surface part is carried out, thereby improving the covering property of the heat shrinkable film on the wooden mold, reducing the wrapping gap of the heat shrinkable film on the wooden mold, and thus improving the mold accuracy. It improves the problem that when manufacturing the mold, the concave surface of the crucible support mold makes it difficult for the heat shrinkable film to perfectly fit the surface of the wooden mold, which easily leads to the formation of voids at the junction of the plane and the curved surface, resulting in the inability of the mold to accurately simulate the inner shape surface of the product, causing excessive precision deviation or the scrapping of the entire wooden mold.

[0025] 2. The opening of the transition port enables, when the platform part and the curved surface part are connected and combined, a part of the heat shrinkable mold adhered to each of the platform part and the curved surface part to be extruded into the transition port. Subsequently, the heat shrinkable mold extruded into the transition port is polished, so as to ensure a smooth transition of the heat shrinkable mold between the platform part and the curved surface part, thereby making the precision of the mold better and the usability better.

[0026] 3. The setting of the sunk groove enables, when the platform part and the curved surface part need to be combined, the curved surface part to pass through the sunk groove, so that the sunk groove initially positions the position between the curved surface part and the platform part, thereby ensuring the precision of the position when the curved surface part and the platform part are assembled, making the precision of the mold better and the usability better. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 is a cross-sectional view of the overall structure of an embodiment of the present application.

[0029] Figure 3 is Figure 2 an enlarged view of part A of

[0030] Description of the Reference Numerals: 1, mold base; 11, platform part; 111, sunk groove; 112, connection hole; 12, curved surface part; 121, connection convex block; 122, transition port; 123, central hole; 2, bracket assembly; 21, fixing seat; 211, fixing hole; 212, weight reduction hole; 22, fixing member; 23, support column; 231, mounting hole; 24, reinforcing rib. Detailed Embodiment

[0031] The following will Figures 1-3 further describe the present application in detail with reference to the attached

[0032] An embodiment of the present application discloses a carbon-carbon crucible support needle-punched preform mold. Referring to Figure 1 , a carbon-carbon crucible support needle-punched preform mold includes a mold base 1 and a bracket assembly 2, and the bracket assembly 2 is arranged on the mold base 1.

[0033] Referring to Figure 1 and Figure 2, the mold base 1 includes a platform portion 11 and a curved surface portion 12. The platform portion 11 is cylindrical, and the side surface of the curved surface portion 12 is arc-shaped. The platform portion 11 is disposed on the curved surface portion 12. A sunk groove 111 is formed in the middle position on one side of the platform portion 11. The groove body of the sunk groove 111 is frustum-shaped. The diameter dimension of the groove body of the sunk groove 111 on the side close to the curved surface portion 12 of the platform portion 11 is larger than the direct dimension on the side far from the platform portion 11. The side of the curved surface portion 12 close to the platform portion 11 is frustum-shaped. When the platform portion 11 is disposed on the curved surface portion 12, the side of the curved surface portion 12 close to the platform portion 11 penetrates through the sunk groove 111 and abuts against the platform portion 11 in a mating manner. Thus, when the platform portion 11 and the curved surface portion 12 need to be combined, the curved surface portion 12 penetrates through the sunk groove 111, so that the sunk groove 111 initially positions the position between the curved surface portion 12 and the platform portion 11, thereby ensuring the accuracy of the position when the curved surface portion 12 and the platform portion 11 are assembled, and thus making the accuracy of the mold better.

[0034] Refer to Figure 1 and Figure 2 , a through connection hole 112 is formed in the middle position of the platform portion 11. The hole body of the connection hole 112 is frustum-shaped. The diameter dimension of the connection hole 112 on the side close to the curved surface portion 12 is larger than the diameter dimension on the side far from the curved surface portion 12. A connection convex block 121 is coaxially and fixedly disposed in the middle position on the side of the curved surface portion 12 close to the platform portion 11. The connection convex block 121 is frustum-shaped. The diameter dimension of the connection convex block 121 on the side close to the curved surface portion 12 is larger than the diameter dimension on the side far from the curved surface portion 12. When the platform portion 11 is disposed on the curved surface portion 12, the connection convex block 121 penetrates through and is slidably mated with the connection hole 112. When the connection block of the platform portion 11 penetrates through the connection hole 112, the assembly connection between the platform portion 11 and the curved surface portion 12 is further positioned, thereby ensuring the accuracy of the position when the curved surface portion 12 and the platform portion 11 are assembled, and thus making the accuracy of the mold better. At the same time, it also makes the separation between the curved surface portion 12 and the platform portion 11 simpler and more convenient, and thus makes the mold demolding simpler and more convenient.

[0035] Refer to Figure 3 , a transition opening 122 is formed at the transition position between the platform portion 11 and the curved surface portion 12. The groove body of the transition opening 122 is annular and coaxial with the platform portion 11. The cross-section of the transition groove is triangular. Thus, when the platform portion 11 and the curved surface portion 12 are connected and combined, a part of the heat shrinkable mold adhered to each of the platform portion 11 and the curved surface portion 12 is extruded to the transition opening 122, and then the heat shrinkable mold extruded to the transition opening 122 is polished, so as to ensure the smooth transition of the heat shrinkable mold between the platform portion 11 and the curved surface portion 12, and thus make the accuracy of the mold better.

[0036] Refer to Figure 1 and Figure 2, a central hole 123 is provided on one side of the middle position of the curved surface portion 12 close to the platform portion 11. In the embodiment of the present application, the central hole 123 is used for fitting with the installation of the needle punching machine.

[0037] In the embodiment of the present application, the materials selected for the bracket assembly 2 are all metal materials, so that the bracket assembly 2 has high structural strength and strong bearing capacity, and is easy to disassemble and interchange.

[0038] Refer to Figure 1 and Figure 2 , the bracket assembly 2 includes a fixed seat 21 and a plurality of fixing members 22. The fixed seat 21 is cylindrical, and the fixed seat 21 is provided with a plurality of fixing holes 211. The plurality of fixing holes 211 are divided into multiple fixing groups. The fixing holes 211 within the same fixing group are circumferentially and uniformly distributed around the axis of the fixed seat 21 along the same circumferential direction, and the different fixing groups are uniformly distributed radially from the inside to the outside of the fixed seat 21. In the embodiment of the present application, the fixing member 22 is a fixing screw. When the fixed seat 21 is fixedly connected to the mold table 1, the fixing screws of each fixing member 22 are respectively inserted into the fixing holes 211 of the same fixing group and are threadedly connected to the mold table 1. Thus, when the fixed seat 21 is fixedly connected to the mold tables 1 of different sizes, the fixing members 22 are respectively inserted into the fixing holes 211 at different distances from the middle position of the fixed seat 21, so that the fixed seat 21 is fixedly connected to the mold tables 1 of different sizes, and the bracket assembly 2 is applicable to various size types of wooden mold tables 1. Subsequently, only the mold table 1 needs to be remade and replaced for different molds, which is beneficial to improving the mold accuracy and reducing costs.

[0039] Refer to Figure 1 and Figure 2 , the fixed seat 21 is provided with a plurality of through weight-reducing holes 212. The weight-reducing holes 212 are circumferentially and uniformly distributed around the axis of the fixed seat 21, so that the mass of the fixed disk is reduced, and at the same time, the material use of the fixed disk is reduced, thereby reducing material waste.

[0040] Refer to Figure 1 and Figure 2 , the bracket assembly 2 further includes a support column 23. The support column 23 is a hollow cylinder, and the support column 23 is coaxially and fixedly arranged on the fixed seat 21. A plurality of mounting holes 231 are provided on the outer peripheral surface of the support column 23, and each mounting hole 231 is used for connecting with the needle punching machine, so that the fixed connection between the support column 23 and the needle punching machine is simpler and more convenient.

[0041] Refer to Figure 1 and Figure 2, the bracket assembly 2 further includes a plurality of reinforcing ribs 24. Each reinforcing rib 24 is located between the support column 23 and the fixed seat 21. One end of each reinforcing rib 24 is fixedly connected to the fixed seat 21, and the other end of each reinforcing rib 24 is fixedly connected to the support column 23. The reinforcing ribs 24 are circumferentially and uniformly distributed around the axis of the fixed seat 21, so that the support column 23 is supported by the reinforcing ribs 24, thereby making the fixed connection between the support column 23 and the fixed seat 21 more stable.

[0042] The implementation principle of the carbon-carbon crucible support needle-punched preform mold in the embodiment of the present application is as follows: when the mold table 1 needs to be bonded with a heat-shrinkable film, the platform part 11 and the curved surface part 12 are respectively wrapped with the heat-shrinkable film independently for bonding, so that the plane and the arc surface are independently wrapped by the heat-shrinkable mold. When the wrapping of the platform part 11 and the curved surface part 12 is completed respectively, then the assembly of the platform part 11 and the curved surface part 12 is carried out, thereby improving the covering property of the heat-shrinkable film on the wooden mold, reducing the wrapping gap of the heat-shrinkable film on the wooden mold, thereby improving the mold accuracy, and improving the problem that when manufacturing the mold, the "concave" surface of the crucible support mold makes it difficult for the heat-shrinkable film to perfectly fit the surface of the wooden mold, which easily leads to the formation of voids at the junction of the plane and the curved surface, resulting in the mold being unable to accurately simulate the inner surface of the product, causing too large precision deviation or the scrapping of the entire wooden mold.

[0043] The above are all the preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A carbon-carbon crucible support needle punching preform mold, characterized in that: The mold platform (1) comprises a platform (1) and a support assembly (2), wherein the mold platform (1) comprises a platform portion (11) and a curved portion (12), wherein the platform portion (11) is arranged on the curved portion (12), wherein the platform portion (11) and the curved portion (12) are independently bonded and wrapped with heat shrink film, and the support assembly (2) is arranged on the mold platform (1).

2. A carbon-carbon crucible support needle punched preform mold according to claim 1, characterized in that: A transition opening (122) is provided at the transition position between the platform portion (11) and the curved portion (12).

3. The carbon-carbon crucible support needle punching preform mold according to claim 1, characterized in that: The platform portion (11) is provided with a recessed groove (111), and the curved surface portion (12) is inserted into the recessed groove (111) and abuts against the platform portion (11).

4. A carbon-carbon crucible support needle punched preform mold according to claim 3, characterized in that: The platform portion (11) is provided with a connecting hole (112) which is arranged through the platform portion (11), and the curved portion (12) is fixedly provided with a connecting protrusion (121), and the connecting protrusion (121) is arranged through and slidably fits in the connecting hole (112).

5. The carbon-carbon crucible support needle punched preform mold according to claim 1, characterized in that: The support assembly (2) comprises a fixing seat (21) and a plurality of fixing members (22); the fixing seat (21) is provided with a plurality of fixing holes (211); the plurality of fixing holes (211) are evenly distributed from the inside to the outside along the radial direction of the fixing seat (21); when the fixing seat (21) is fixedly connected to the molding platform (1), each of the fixing members (22) is respectively penetrated through each of the fixing holes (211) and fixedly connected to the molding platform (1).

6. The carbon-carbon crucible support needle punching preform mold according to claim 5, characterized in that: The support assembly (2) further comprises a support column (23), wherein the support column (23) is fixedly disposed on the fixing seat (21), and the support column (23) is provided with a plurality of mounting holes (231), and each mounting hole (231) is used for connecting to the acupuncture machine.

7. The carbon-carbon crucible support needle punching preform mold according to claim 6, characterized in that: The support assembly (2) further comprises a plurality of reinforcing ribs (24), one end of each of the reinforcing ribs (24) being fixedly connected to the fixing seat (21), and the other end of each of the reinforcing ribs (24) being fixedly connected to the supporting column (23).

8. The carbon-carbon crucible support needle punching preform mold according to claim 5, characterized in that: The fixing seat (21) is provided with a plurality of weight-reducing holes (212) penetrating therethrough.

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