An internal mold for forming a tubular structure and a demolding method

Abstract

The present invention relates to the field of molds, and particularly to an internal mold for forming a tubular structure and a demolding method. The internal mold for forming a tubular structure includes a mold body, and the mold body includes at least two first forming members capable of moving towards the axis of the tubular structure along the radial direction of the tubular structure. Through the internal mold for forming a tubular structure and the demolding method provided by the present invention, during demolding, first, the first forming members are moved along the radial direction. Then, during this process, the first forming members are completely separated from the inner wall of the tubular structure. Next, the first forming members are moved along the axial direction of the tubular structure. During this process, no friction is generated between the first forming members and the inner wall of the tubular structure, thereby being able to reduce the demolding difficulty.

Description

Technical Field

[0001] The present invention relates to a mold, in particular to an inner mold for forming a tubular structure and a demolding method. Background Art

[0002] A launch tube is a large tubular device, and traditional launch tubes are mostly made of metal. With the development of material technology, launch tubes made of carbon fiber composite materials have emerged. When using carbon fiber composite materials to make launch tubes, usually sheet-shaped carbon fiber raw materials are wound around the surface of a mold. After heating and pressurization, the carbon fiber solidifies, and then demolding can be carried out at this time.

[0003] In the prior art, the design of the mold is unreasonable, so that during demolding, friction occurs between the mold and the inner surface of the already formed launch tube, which is not only not conducive to demolding, but also easily has an adverse impact on the surfaces of the mold and the launch tube. Summary of the Invention

[0004] The object of the present invention is to provide an inner mold for forming a tubular structure and a demolding method, aiming at the problem of inconvenient demolding existing in the prior art during the demolding process when using carbon fiber raw materials to make large tubular structures.

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

[0006] An inner mold for forming a tubular structure includes a mold body, and the mold body includes at least two first forming members that can move along the radial direction of the tubular structure towards the axis of the tubular structure.

[0007] As a preferred solution of the present invention, the mold body further includes a second forming member, and the second forming member is spliced with at least two first forming members to form a forming surface in the shape of a cylindrical surface.

[0008] As a preferred solution of the present invention, the first forming member includes a first surface plate, a first support assembly, and a first strengthening assembly;

[0009] The first surface plate is a columnar plate, the first support assembly includes a plurality of arc-shaped plates arranged at intervals and straight plates for connecting each arc-shaped plate, and the first strengthening assembly includes a plurality of strengthening rods connected to the first support assembly;

[0010] The first surface plate is connected to the first support assembly.

[0011] As a preferred solution of the present invention, the second forming member includes a second surface plate, a second support assembly, and a second strengthening assembly;

[0012] The second surface plate is a columnar plate, the second support assembly includes a plurality of arc-shaped plates arranged at intervals and straight plates for connecting each arc-shaped plate, and the second strengthening assembly includes a plurality of strengthening rods connected to the second support assembly;

[0013] The second surface plate is connected to the second support assembly.

[0014] As a preferred embodiment of the present invention, the first surface plate and the second surface plate are spliced to form a forming surface;

[0015] On the end face of the first surface plate, the intersection points of the inner surface of the first surface plate and the two side surfaces of the first surface plate are the first intersection point and the second intersection point respectively, and the intersection points of the outer surface of the first surface plate and the two side surfaces of the first surface plate are the third intersection point and the fourth intersection point respectively;

[0016] The distance between the first intersection point and the second intersection point is greater than the distance between the third intersection point and the fourth intersection point.

[0017] As a preferred embodiment of the present invention, the number of the second forming members is two, and the number of the first forming members is two;

[0018] The two second forming members are arranged oppositely, and the two first forming members are arranged oppositely.

[0019] As a preferred embodiment of the present invention, it further includes a mold clamping connecting frame, and the mold clamping connecting frame includes a plurality of connecting rods, and the plurality of connecting rods enclose a closed frame structure connected end to end.

[0020] As a preferred embodiment of the present invention, a plurality of first connecting plates are provided at both ends of the mold body, and the mold clamping connecting frame further includes a second connecting plate, and the first connecting plate is connected to the second connecting plate.

[0021] As a preferred embodiment of the present invention, a guide rail is provided inside.

[0022] A demolding method for forming a tubular structure includes the following steps: moving the first forming member along the radial direction of the tubular structure towards the axis of the tubular structure; moving the first forming member along the axial direction of the tubular structure until the first forming member is separated from the tubular structure.

[0023] To sum up, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0024] 1. Through the internal mold for forming a tubular structure and the demolding method provided by the present invention, during demolding, first move the first forming member along the radial direction. In this process, the first forming member is completely separated from the inner wall of the tubular structure, and then move the first forming member along the axial direction of the tubular structure. In this process, there is no friction between the first forming member and the inner wall of the tubular structure, so that the demolding difficulty can be reduced;

[0025] 2. Through the internal mold for forming a tubular structure provided by the present invention, the distance between the first intersection point and the second intersection point is greater than the distance between the third intersection point and the fourth intersection point, so that the first forming member can move smoothly when moving along the radial direction towards the axis of the tubular structure. Description of the Drawings

[0026] Figure 1 It is a schematic structural view of the inner mold for forming a tubular structure provided by the present invention.

[0027] Figure 2 It is a schematic structural view of the inner mold for forming a tubular structure provided by the present invention from another perspective.

[0028] Figure 3 It is a schematic structural view of the first forming member provided by the present invention.

[0029] Figure 4 is Figure 3 The partial enlarged view of part V in.

[0030] Figure 5 It is a schematic structural view of the first forming member provided by the present invention from another perspective.

[0031] Figure 6 It is a comparison schematic diagram of the distance L1 between the first intersection point and the second intersection point and the distance L2 between the third intersection point and the fourth intersection point.

[0032] Figure 7 It is a schematic structural view of the second forming member provided by the present invention.

[0033] Figure 8 is Figure 7 The partial enlarged view of part VI in.

[0034] Figure 9 It is a schematic structural view of the mold clamping connecting frame provided by the present invention.

[0035] Figure 10 It is a schematic diagram of the mold body during the demolding process provided by the present invention.

[0036] Icon: 1 - Inner mold for forming a tubular structure; 11 - Mold body; 12 - Mold clamping connecting frame; 13 - Joint; 14 - Forming surface; 111 - First forming member; 112 - Second forming member; 113 - First connecting plate; 114 - Operating space; 121 - Connecting rod; 122 - Second connecting plate; 123 - Reinforcing rod; 124 - Joint connecting part; 1111 - First surface plate; 1112 - First support assembly; 1113 - First connecting assembly; 1114 - Weight reduction hole; 1121 - Second surface plate; 1122 - Second support assembly; 1123 - Second connecting assembly. Detailed implementation manners

[0037] The present invention will be described in detail below with reference to the accompanying drawings.

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to 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.

[0039] Embodiment 1

[0040] Please refer to Figures 1-9 . The present invention provides an inner mold 1 for forming a tubular structure. This inner mold 1 for forming a tubular structure includes a mold body 11, a mold clamping connecting frame 12 and a joint 13.

[0041] The mold body 11 includes two first forming members 111 and two second forming members 112. The two first forming members 111 are arranged opposite to each other, and the two second forming members 112 are arranged opposite to each other. The two first forming members 111 and the two second forming members 112 are spliced to form a forming surface 14 in the shape of a cylindrical surface. An operation space 114 is also provided at the center of the mold body 11, and a guide rail is provided in the operation space 114. Further, the guide rail is provided on the first forming member 111.

[0042] Specifically, the first forming member 111 includes a first surface plate 1111, a first support assembly 1112 and a first strengthening assembly. The first surface plate 1111 is a columnar plate. The first support assembly 1112 includes a plurality of arcuate plates arranged at intervals and straight plates for connecting each arcuate plate. The first strengthening assembly includes a plurality of strengthening rods 123 connected to the first support assembly 1112; the first surface plate 1111 is connected to the first support assembly 1112. Further, the first surface plate 1111, the first support assembly 1112 and the first strengthening assembly are all made of metal materials. The first support assembly 1112 and the first strengthening assembly are connected by welding. Weight-reducing holes 1114 are provided on each arcuate plate and straight plate.

[0043] The second forming assembly includes a second surface plate 1121, a second support assembly 1122 and a second strengthening assembly; the second surface plate 1121 is a columnar plate. The second support assembly 1122 includes a plurality of arcuate plates arranged at intervals and straight plates for connecting each arcuate plate. The second strengthening assembly includes a plurality of strengthening rods 123 connected to the second support assembly 1122; the second surface plate 1121 is connected to the second support assembly 1122. Further, the first surface plate 1111, the first support assembly 1112 and the first strengthening assembly are all made of metal materials. The first support assembly 1112 and the first strengthening assembly are connected by welding. Weight-reducing holes 1114 are provided on each arcuate plate and straight plate.

[0044] The first surface plate 1111 and the second surface plate 1121 are spliced to form the molding surface 14. On the end face of the first surface plate 1111, the intersections of the inner surface of the first surface plate 1111 with the two side surfaces of the first surface plate 1111 are the first intersection point A and the second intersection point B respectively, and the intersections of the outer surface of the first surface plate 1111 with the two side surfaces of the first surface plate 1111 are the third intersection point C and the fourth intersection point D respectively. The distance L2 between the first intersection point A and the second intersection point B is greater than the distance L1 between the third intersection point C and the fourth intersection point D. With this structure, during the process of moving the first molding member 111 along the radial direction of the tubular structure, it is possible to avoid friction between the side surface of the first molding member 111 and the second molding member 112, making the demolding operation more convenient.

[0045] The connection between the first molding member 111 and the second molding member 112 is achieved through the mold clamping connection frame 12.

[0046] The mold clamping connection frame 12 is used to be arranged at the end of the mold body 11. Among them, the number of the mold clamping connection frames 12 is two. One mold clamping connection frame 12 is connected to one end of the mold body 11, and the other mold clamping connection frame 12 is connected to the other end of the mold body 11.

[0047] Specifically, a plurality of first connecting plates 113 are arranged at both ends of the mold body 11. The mold clamping connection frame 12 includes a plurality of connecting rods 121 and a second connecting plate 122. The plurality of connecting rods 121 enclose a closed frame structure connected end to end. The second connecting plate 122 is fixedly connected to the connecting rods 121. The first connecting plate 113 is detachably connected to the second connecting plate 122.

[0048] Furthermore, connection holes are provided on the first connecting plate 113, and connection holes are provided on the second connecting plate 122. The first connecting plate 113 and the second connecting plate 122 can be detachably connected through bolts.

[0049] A plurality of reinforcing rods 123 are also provided on the mold clamping connection frame 12. The reinforcing rods 123 are arranged in the frame formed by the connecting rods 121 and are connected to the connecting rods 121. A joint connection portion 124 is provided at the center of the mold clamping connection frame 12, and the joint connection portion 124 is used to be connected to the joint 13.

[0050] One end of the joint 13 is connected to the mold clamping connection frame 12, and the other end of the joint 13 is used to be connected to the fixing device of the inner molding die.

[0051] Embodiment 2

[0052] Please refer to Figure 10 . The present invention also provides a demolding method for forming a tubular structure, which uses the inner molding die 1 for forming a tubular structure provided in Embodiment 1, and includes the following steps:

[0053] S1. Move the first forming member 111 radially towards the axis of the tubular structure along the tubular structure;

[0054] S2. Move the first forming member 111 axially along the tubular structure until the first forming member 111 is separated from the tubular structure.

[0055] Further, in step S1, the following steps are included:

[0056] S101. Separate the mold closing connecting member from the mold body 11;

[0057] S102. Place the trolley for demolding in the operation space 114, connect the trolley to the first forming member 111, and the trolley drives the first forming member 111 to move radially towards the axis of the tubular structure along the tubular structure.

[0058] Further, the trolley includes wheels and a hydraulic lifting device. The wheels are connected to the hydraulic lifting device, and the wheels can drive the hydraulic lifting device to move. Specifically, the hydraulic lifting device can be a hydraulic cylinder, a jack, etc. The hydraulic lifting device can be connected to the first forming member 111. When the hydraulic lifting device contracts, it drives the first forming member 111 to move radially along the mold body 11; when the wheels drive the hydraulic lifting device to move along the guide rail, the trolley can drive the first forming member 111 to move axially along the mold body 11. The specific structure of the trolley is prior art and will not be elaborated here.

[0059] In step S2, the following steps are included:

[0060] S201. Move the trolley along the guide rail, and the trolley drives the first forming member 111 until the first forming member 111 is completely staggered from the tubular structure in the radial direction.

[0061] Repeat the above steps S1 and S2 to separate the two first forming members 111 from the tubular structure.

[0062] Then the following steps are carried out:

[0063] S3. Move the second forming member 112 radially towards the axis of the tubular structure along the tubular structure;

[0064] S4. Move the second forming member 112 axially along the tubular structure until the second forming member 112 is separated from the tubular structure.

[0065] The beneficial effects of the present invention are as follows:

[0066] 1. Through the tubular structure forming inner mold 1 and the demolding method provided by the present invention, during demolding, first move the first forming member 111 in the radial direction. During this process, the first forming member 111 is completely separated from the inner wall of the tubular structure, and then move the first forming member 111 in the axial direction of the tubular structure. During this process, there will be no friction between the first forming member 111 and the inner wall of the tubular structure, thus reducing the demolding difficulty.

[0067] 2. Through the tubular structure forming inner mold 1 provided by the present invention, the distance L2 between the first intersection point A and the second intersection point B is greater than the distance L1 between the third intersection point C and the fourth intersection point D, so that the first forming member 111 can move smoothly when moving radially towards the axis of the tubular structure.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A demoulding method for forming a tubular structure, characterized in that, Adopt a tubular structure forming inner mold, the tubular structure forming inner mold includes a mold body, and the mold body includes at least two first forming parts capable of moving towards the axis of the tubular structure along the radial direction of the tubular structure; The mold body further includes a second forming part, and the second forming part and at least two of the first forming parts are spliced to form a forming surface in the shape of a cylindrical surface; The first forming part includes a first surface plate, a first support assembly, and a first strengthening assembly; The first surface plate is a columnar plate, the first support assembly includes a plurality of arc-shaped plates arranged at intervals and straight plates for connecting each arc-shaped plate, and the first strengthening assembly includes a plurality of strengthening rods connected to the first support assembly; The first surface plate is connected to the first support assembly; The second forming part includes a second surface plate, a second support assembly, and a second strengthening assembly; The second surface plate is a columnar plate, the second support assembly includes a plurality of arc-shaped plates arranged at intervals and straight plates for connecting each arc-shaped plate, and the second strengthening assembly includes a plurality of strengthening rods connected to the second support assembly; The second surface plate is connected to the second support assembly; The first surface plate and the second surface plate are spliced to form the forming surface; On the end face of the first surface plate, the intersection points of the inner surface of the first surface plate and the two side surfaces of the first surface plate are respectively a first intersection point and a second intersection point, and the intersection points of the outer surface of the first surface plate and the two side surfaces of the first surface plate are respectively a third intersection point and a fourth intersection point; The distance between the first intersection point and the second intersection point is greater than the distance between the third intersection point and the fourth intersection point; It further includes a mold closing connecting frame, and the mold closing connecting frame includes a plurality of connecting rods, and the plurality of connecting rods enclose a closed frame structure connected end to end; Both ends of the mold body are provided with a plurality of first connecting plates, the mold closing connecting frame further includes a second connecting plate, and the first connecting plate is connected to the second connecting plate; An operation space is further provided at the center of the mold body, and a guide rail is provided in the operation space; The demolding method includes the following steps: S1. Move the first forming part towards the axis of the tubular structure along the radial direction of the tubular structure; S2. Move the first forming part along the axial direction of the tubular structure until the first forming part is separated from the tubular structure; Among them, in S1, it includes the following steps: S101. Separate the mold closing connecting piece from the mold body; S102. Place the trolley for demolding in the operation space, connect the trolley to the first forming part, and the trolley drives the first forming part to move towards the axis of the tubular structure along the radial direction of the tubular structure; Further, the trolley includes wheels and a hydraulic lifting device. The wheels are connected to the hydraulic lifting device. The wheels can drive the hydraulic lifting device to move. The hydraulic lifting device can be connected to the first forming member. When the hydraulic lifting device contracts, it drives the first forming member to move in the radial direction of the mold body. When the wheels drive the hydraulic lifting device to move along the guide rail, the trolley can drive the first forming member to move in the axial direction of the mold body.

2. The demolding method for forming a tubular structure according to claim 1, characterized in that The number of the second forming members is two, and the number of the first forming members is two. The two second forming members are arranged oppositely, and the two first forming members are arranged oppositely.

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