A molding tool and demoulding method for a cylindrical structure with an irregular inner surface

Abstract

The present invention relates to the field of processing molds, and specifically to a molding tool and demoulding method for a cylindrical structure with an irregular inner surface, wherein the molding tool comprises a molding component, wherein the outer surface of the molding component is used to match the inner surface of the cylindrical structure, and the molding component comprises at least three blocks; when processing the cylindrical structure, the at least three blocks are used to be spliced ​​to form a molding surface, and a accommodating space is provided in the middle of the molding component; when demoulding, the accommodating space is used to provide space for the blocks, so as to facilitate the separation of the blocks from the cylindrical structure. With the molding tool provided by the present invention, during processing, the molding components are connected to form a molding surface. After processing, when demoulding is required, the blocks are moved into the accommodating space until they are separated from the formed cylindrical structure. At this time, the blocks can be moved out more conveniently, thereby facilitating demoulding.

Description

Technical Field

[0001] The invention relates to a processing mould, in particular to a forming tool with a cylindrical structure having an irregular inner surface and a demoulding method. Background Art

[0002] When using carbon fiber composite materials to make a cylindrical structure, the sheet-like carbon fiber raw material is usually wrapped around the surface of the mold. After heating and pressurizing, the carbon fiber is solidified and demolding can be performed at this time.

[0003] In the prior art, the mold design is unreasonable, so that when demolding, the mold and the inner surface of the formed launch tube produce friction, which is not conducive to demolding and easily has an adverse effect on the surface of the mold and the cylindrical structure. In particular, when processing a cylindrical structure with an irregular inner surface made of carbon fiber composite materials, it is even more difficult to demold using a traditional mold. Summary of the invention

[0004] The purpose of the present invention is to provide a molding tool and a demoulding method for a cylindrical structure with an irregular inner surface in order to solve the problem of demoulding difficulty in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A molding tool for a cylindrical structure with an irregular inner surface, comprising a molding component, wherein the outer surface of the molding component is used to match the inner surface of the cylindrical structure, and the molding component includes at least three blocks; when processing the cylindrical structure, the at least three blocks are used to be spliced ​​to form a molding surface, and a accommodating space is provided in the middle of the molding component; when demolding, the accommodating space is used to provide space for the blocks, so as to facilitate the separation of the blocks from the cylindrical structure. With the molding tool provided by the present invention, during processing, the molding components are connected to form a molding surface. After processing, when demolding is required, the blocks are moved into the accommodating space until they are separated from the formed cylindrical structure. At this time, the blocks can be moved out more conveniently, thereby facilitating demolding.

[0007] As a preferred solution of the present invention, it also includes a core mold, which is placed in the accommodating space and is movably connected to the molding component.

[0008] As a preferred solution of the present invention, a first sliding part is provided on the core mold, and a second sliding part is provided on the molding assembly, and the first sliding part and the second sliding part are slidably connected. When demolding, the core mold is slid to separate the core mold from the molding assembly, so that each block on the molding assembly can move into the accommodating space, thereby realizing the separation of each block from the formed cylindrical structure.

[0009] As a preferred embodiment of the present invention, the core mold further comprises a base, and the first sliding part is fixedly connected to the base; the base is a hollow structure, and a rib plate is provided in the hollow structure of the base, and the rib plate is connected to the inner wall of the base. Setting the core mold as a hollow structure can reduce the weight of the core mold and facilitate the movement of the core mold. At the same time, providing the rib plate in the core mold is conducive to strengthening the pressure bearing capacity of the core mold.

[0010] As a preferred embodiment of the present invention, the molding assembly includes a first block and a second block; when the molding tool is used for processing, the first block and the second block are spliced ​​to form a molding surface; when the molding tool is used for demolding, the first block can move into the accommodating space.

[0011] As a preferred solution of the present invention, the first sliding part is a slide groove, the second sliding part is a slider, the slider is arranged on the first block, the surface of the core mold corresponding to the first block is provided with a slide groove, and the core mold has a contact surface in contact with the second block. In the present invention, the surface of the core mold corresponding to the first block is provided with a slide groove, and the surface corresponding to the second block is in direct contact with the second block, so that the core mold can fully support the first block and the second block.

[0012] As a preferred solution of the present invention, a plurality of through holes are provided on the surface of the second block in contact with the core mold. The above structure can avoid the surface flatness of the second block caused by processing errors, thereby avoiding the core mold from being subjected to resistance caused by the surface flatness during movement, and facilitating the movement of the core mold.

[0013] As a preferred solution of the present invention, the core mold has a first end and a second end, and the cross-sectional size of the core mold gradually decreases in the direction from the first end to the second end. With the above structure, the core mold can move in the direction from the first end to the second end with very little resistance, and during the movement of the core mold, the first block can gradually move toward the center of the accommodating space, so that the first block is naturally separated from the inner surface of the cylindrical structure, and at the same time, the core mold can always maintain contact with the first block, thereby always providing support for the first block.

[0014] As a preferred solution of the present invention, it also includes an end plate, one end of the molding component is connected to one end plate, and the other end of the molding component is connected to another end plate; a connecting portion for connecting to the blocks is provided on the end plate.

[0015] A demoulding method comprises the following steps: moving the blocks along the radial direction of the cylindrical structure until the blocks are separated from the cylindrical structure.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] By adopting the molding tool provided by the present invention, during demoulding, the core mold is moved until the blocks can be separated from the formed cylindrical structure. At this time, the blocks can be moved out more conveniently, thereby facilitating demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the molding tool provided in Example 1 of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the forming tool provided in Example 1 of the present invention after the end plate is removed.

[0020] Figure 3 yes Figure 2 A partial enlarged view of part A in the middle.

[0021] Figure 4 It is a structural schematic diagram of the core mold provided in Example 1 of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the first block provided in Example 1 of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the second block provided in Example 1 of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the molding tool provided in Example 2 of the present invention.

[0025] Figure 8 It is a schematic diagram of the structure of the forming tool provided in Example 2 of the present invention after the end plate is removed.

[0026] Fig. 9 It is a schematic diagram of the structure of the core mold provided in Example 2 of the present invention.

[0027] Fig.10 It is a schematic diagram of the structure of the molding assembly provided in Example 2 of the present invention.

[0028] Icons: 1-molding component; 2-end plate; 3-core mold; 31-connecting hole; 11-first block; 12-second block; 13-accommodating space; 14-molding surface; 111-slider; 1111-sliding column; 1112-groove; 322-convex strip; 31-base; 312-rib plate; 32-slide groove; 113-weight-reducing hole. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Example 1

[0032] See also Figure 1-Figure 6 . This embodiment provides a molding tool for a cylindrical structure with an irregular inner surface, which includes a core mold 3, a molding assembly 1 and an end plate 2. The outer surface of the molding assembly 1 is used to adapt to the inner surface of the cylindrical structure, and a receiving space 13 is provided in the middle of the molding assembly 1. The core mold 3 is placed in the receiving space 13 and abuts against the molding assembly 1. There are two end plates 2, one of which is connected to one end of the molding assembly 1, and the other end plate 2 is connected to the other end of the molding assembly 1.

[0033] The molding assembly 1 includes a first block 11 and a second block 12. In this embodiment, the number of the first blocks 11 is two, and the number of the second blocks 12 is two.

[0034] The first block 11 and the second block 12 are spliced ​​to form a molding surface 14. The molding surface 14 is the outer surface of the molding component 1, and the molding surface 14 is used to adapt to the inner surface shape of the cylindrical structure to be processed.

[0035] The first block 11 and the second block 12 are also spliced ​​to form a receiving space 13, and the receiving space 13 is located at the center of the molding assembly 1. When processing the cylindrical structure, the receiving space 13 is used to accommodate the core mold 3; during the demoulding process, the receiving space 13 is used to provide space for the first block 11 and the second block 12 to move toward the center of the molding assembly 1, thereby facilitating demoulding.

[0036] Specifically, there are two first blocks 11, which are arranged opposite to each other, and there are two second blocks 12, which are arranged opposite to each other. A channel arranged along the radial direction of the molding component 1 is formed between the two second blocks 12, so that the first block 11 can move along the channel.

[0037] The first block 11 is provided with a slider 111. The slider 111 includes a base and a sliding post 1111. The base is fixedly connected to the first block 11 or formed integrally, and the sliding post 1111 is connected to the base or formed integrally. A groove 1112 is provided on the side of the sliding post 1111.

[0038] A plurality of weight-reducing holes 113 are provided on the surface of the second block 12 located in the accommodating space 13 .

[0039] The ends of the first block 11 and the second block 12 are provided with connection holes 31 for connecting with the end plate 2 .

[0040] The core mold 3 includes a base 31 and a slide groove 32, and the slide groove 32 is fixedly connected to the base 31. The core mold 3 has a first end and a second end, and the cross-sectional size of the core mold 3 gradually decreases along the direction from the first end to the second end. When the core mold 3 is placed in the accommodating space 13, the direction from the first end to the second end is consistent with the axial direction of the molding component 1.

[0041] Specifically, the cross section of the base 31 is a rectangular structure. Two oppositely disposed side surfaces of the base 31 are provided with slide grooves 32, and the two side surfaces are used to connect with the first sub-block 11. Another pair of oppositely disposed side surfaces of the base 31 are used to abut against the second sub-block 12.

[0042] A convex strip 322 is provided in the slide groove 32 for matching with the groove 1112 on the slide post 1111 .

[0043] The base body 31 is a hollow structure. A rib plate 312 is provided in the hollow structure of the base body 31 . The rib plate 312 is connected to the inner wall of the base body 31 .

[0044] The end plate 2 is provided with a connection hole 31, and the connection hole 31 is used to connect with the first sub-block 11 and the second sub-block 12. When the end plate 2 is connected with the molding assembly 1, the relative position between the first sub-block 11 and the second sub-block 12 is fixed.

[0045] The present invention also provides a demoulding method. The demoulding method comprises the following steps:

[0046] The first block 11 is moved along the radial direction of the cylindrical structure until the first block 11 is separated from the cylindrical structure. Specifically, the demoulding method includes the following steps:

[0047] S1. Remove the end plate 2 from the molding assembly 1;

[0048] S2. Move the core mold 3 in the direction from the second end of the core mold 3 to the first end. As the core mold 3 moves in the axial direction, the first block 11 moves radially toward the center of the accommodating space 13;

[0049] S3. The first sub-block 11 is separated from the formed cylindrical structure.

[0050] The working principle of the molding tool provided in the embodiment of the present invention is:

[0051] When in use, the core mold 3 is placed in the accommodating space 13, and the first blocks 11 and the second blocks 12 are connected in sequence, so that the first blocks 11 and the second blocks 12 are spliced ​​to form a molding surface 14. Then the end plate 2 is connected to the end of the molding component 1. The raw materials of the carbon fiber composite sheet are wound on the molding surface 14, and then demolding is performed after curing and molding. During the demolding process, the core mold 3 is moved in the direction from the second end of the core mold 3 to the first end. As the core mold 3 moves in the axial direction, the first block 11 moves radially toward the center of the accommodating space 13, and a gap is generated between the first block 11 and the formed cylindrical structure, thereby facilitating demolding.

[0052] 1. When using the molding tool provided by the present invention, the core mold 3 is moved during demoulding until the blocks can be separated from the formed cylindrical structure. At this time, the blocks can be moved out more conveniently, thereby facilitating demoulding.

[0053] 2. The slider 111 and the slide groove 32 are connected, which can facilitate the movement of the core mold 3 and provide a guide for the core mold 3. There is no need to add lubricating oil or grease, and it can work under heating and pressurized conditions.

[0054] 3. A plurality of through holes are provided on the surface of the second block 12 in contact with the core mold 3, which can avoid the insufficient surface flatness caused by processing errors on the second block 12, thereby avoiding the resistance caused by insufficient surface flatness during the movement of the core mold 3, thereby facilitating the movement of the core mold 3.

[0055] 4. Along the direction from the first end to the second end, the cross-sectional size of the core mold 3 gradually decreases, so that the core mold 3 can move along the direction from the first end to the second end with very little resistance, and during the movement of the core mold 3, the first block 11 can gradually move toward the center of the accommodating space 13, so that the first block 11 is naturally separated from the inner surface of the cylindrical structure. At the same time, the core mold 3 can always maintain contact with the first block 11, thereby always providing support for the first block 11.

[0056] Example 2

[0057] See also Figure 7-Figure 10 . This embodiment provides a winding tool, which includes a core mold 3, a molding component 1 and an end plate 2. The outer surface of the molding component 1 is used to adapt to the inner surface of the cylindrical structure, and a receiving space 13 is provided in the middle of the molding component 1. The core mold 3 is placed in the receiving space 13 and abuts against the molding component 1. There are two end plates 2, one of which is connected to one end of the molding component 1, and the other end plate 2 is connected to the other end of the molding component 1.

[0058] The molding assembly 1 includes a first block 11 and a second block 12. In this embodiment, the number of the first blocks 11 is four, and the number of the second blocks 12 is four.

[0059] The first block 11 is spaced apart from the second block 12. The first block 11 and the second block 12 are spliced ​​to form a molding surface 14. The molding surface 14 is the outer surface of the molding component 1, and the molding surface 14 is used to adapt to the inner surface shape of the cylindrical structure to be processed.

[0060] The first block 11 and the second block 12 are also spliced ​​to form a receiving space 13, and the receiving space 13 is located at the center of the molding assembly 1. When processing the cylindrical structure, the receiving space 13 is used to accommodate the core mold 3; during the demoulding process, the receiving space 13 is used to provide space for the first block 11 to move to the center of the molding assembly 1, thereby facilitating demoulding.

[0061] A second sub-block 12 is disposed between two adjacent first sub-blocks 11 , and a channel disposed along the radial direction of the molding component 1 is formed between the two adjacent first sub-blocks 11 , so that the second sub-block 12 can move along the channel.

[0062] The first block 11 is provided with a slider 111. The slider 111 includes a base and a sliding post 1111. The base is fixedly connected to the first block 11 or formed integrally, and the sliding post 1111 is connected to the base or formed integrally. A groove 1112 is provided on the side of the sliding post 1111.

[0063] The ends of the first block 11 and the second block 12 are provided with connection holes 31 for connecting with the end plate 2 .

[0064] The core mold 3 includes a base 31 and a slide groove 32, and the slide groove 32 is fixedly connected to the base 31. The core mold 3 has a first end and a second end, and the cross-sectional size of the core mold 3 gradually decreases along the direction from the first end to the second end. When the core mold 3 is placed in the accommodating space 13, the direction from the first end to the second end is consistent with the axial direction of the molding component 1.

[0065] Specifically, a slide groove 32 is provided on each side surface of the base body 31 that is opposite to the first sub-block 11 . Two of the other side surfaces of the base body 31 that are opposite to each other are provided to be spaced apart from the second sub-block 12 .

[0066] A convex strip 322 is provided in the slide groove 32 for matching with the groove 1112 on the slide post 1111 .

[0067] The base body 31 is a hollow structure. A rib plate 312 is provided in the hollow structure of the base body 31 . The rib plate 312 is connected to the inner wall of the base body 31 .

[0068] The end plate 2 is provided with a connection hole 31, and the connection hole 31 is used to connect with the first sub-block 11 and the second sub-block 12. When the end plate 2 and the molding assembly 1 are connected together, the relative position between the first sub-block 11 and the second sub-block 12 is fixed.

[0069] The working principle of the molding tool provided in this embodiment is:

[0070] When in use, the core mold 3 is placed in the accommodating space 13, and the first blocks 11 and the second blocks 12 are connected in sequence, so that the first blocks 11 and the second blocks 12 are spliced ​​to form a molding surface 14. Then the end plate 2 is connected to the end of the molding component 1. The raw materials of the carbon fiber composite sheet are wound on the molding surface 14, and then demolding is performed after curing and molding. During the demolding process, the core mold 3 is moved in the direction from the second end of the core mold 3 to the first end. As the core mold 3 moves in the axial direction, the second block 12 moves radially toward the center of the accommodating space 13, and a gap is generated between the second block 12 and the formed cylindrical structure, thereby facilitating demolding.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forming tool with a cylindrical structure having an irregular inner surface, characterized in that: It comprises a molding component, the outer surface of which is adapted to fit the inner surface of the cylindrical structure, and the molding component comprises at least three blocks; When processing the cylindrical structure, the at least three blocks are used to splice to form a molding surface, and a receiving space is provided in the middle of the molding assembly; During demoulding, the accommodating space is used to provide space for the blocks, so as to facilitate the separation of the blocks from the cylindrical structure; It also includes a core mold, which is placed in the accommodating space and is movably connected to the molding assembly; The core mold is provided with a first sliding part, the molding assembly is provided with a second sliding part, and the first sliding part is slidably connected to the second sliding part; The core mold further includes a base, and the first sliding part is fixedly connected to the base; The base body is a hollow structure, a rib plate is provided in the hollow structure of the base body, and the rib plate is connected to the inner wall of the base body; The molding assembly includes a first block and a second block; When the molding tool is in a state of being used for processing, the first block and the second block are spliced ​​to form a molding surface; When the molding tool is in a state of demoulding, the first block can move into the accommodating space; The core mold has a first end and a second end, and the cross-sectional size of the core mold gradually decreases along the direction from the first end to the second end; The first sliding part is a slide groove, the second sliding part is a slider, the slider is arranged on the first block, and the slide groove is arranged on the surface of the core mold corresponding to the first block; The core mold has a contact surface that contacts the second block; It also includes an end plate, one end of the molding assembly is connected to one end plate, and the other end of the molding assembly is connected to another end plate; The end plate is provided with a connecting portion for connecting with the block; The slider includes a base and a sliding column, the base is fixedly connected to the first block or is integrally formed, the sliding column is connected to the base or is integrally formed, and a groove is provided on the side of the sliding column; The slide groove is provided with a convex strip adapted to the groove on the slide post; The ends of the first block and the second block are provided with connection holes for connecting with the end plate; The end plate is provided with a connecting hole, and the connecting hole is used to connect with the first block and the second block.

2. The molding tool according to claim 1, characterized in that: A plurality of through holes are arranged on the surface of the second block in contact with the core mold.

3. A demoulding method, characterized in that: Based on the molding tool as claimed in claim 1, the following steps are included: The blocks are moved along the radial direction of the cylindrical structure until the blocks are separated from the cylindrical structure.

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