A demolding fixture and demolding method for composite material cylinders

Abstract

This invention discloses a demolding fixture and method for a composite material cylinder. The demolding fixture includes a mold and a demolding guide rail. The mold has an end cap between its first end and the composite material cylinder. The demolding guide rail includes a fixing area and a traction area. One end of the fixing area is provided with an end fixing member that can be detachably connected to the end cap, and the other end of the fixing area is provided with a demolding retaining ring that allows the cylindrical mold to pass through while restricting the longitudinal displacement of the composite material cylinder. The method is performed using the aforementioned demolding fixture. This application effectively disperses the local stress on the composite material cylinder by using a front-end compression and rear-end tension method for demolding, thus avoiding excessive stress concentration and damage during demolding.

Description

Technical Field

[0001] This invention relates to the field of molded composite material demolding technology, and in particular to a demolding tool and method for a composite material cylinder. Background Technology

[0002] After the composite cylinder has cured and molded, it needs to be removed from the mold. To facilitate demolding, the mold surface is usually smooth and coated with a release agent to reduce the friction between the composite cylinder and the mold. However, for composite cylinders with a long length, the demolding stroke is long, and there is still a large amount of friction between the composite cylinder and the mold, making it very difficult to remove the composite cylinder from the mold.

[0003] Currently, there are two methods for demolding composite material cylinders: manual demolding and mechanical demolding. Manual demolding is labor-intensive and inefficient, making it unsuitable for batch demolding. It is also generally not applicable to cylinders that are difficult to demold. Mechanical demolding, on the other hand, uses demolding machines that are expensive, complex in structure, and have long manufacturing cycles. During demolding, the demolding force is often concentrated in a certain area, which can easily damage the composite material cylinder. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a demolding tooling and demolding method for composite material cylinders, which can disperse the local stress on the cylinder during demolding, is simple to operate, can reduce demolding costs and improve demolding efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A demolding fixture for a composite material cylinder includes a demolding guide rail and a mold. The outer periphery of the mold covers the composite material cylinder to be demolded. The demolding guide rail includes two sets of spaced guide blocks, a fixing area for fixing the composite material cylinder, and a traction area for pulling out a cylindrical mold inside the composite material cylinder to complete demolding. The traction area is provided with a drive mechanism for providing traction driving force. The fixing area and the traction area are located between the two guide blocks. The mold includes a first end and a second end. An end cap is provided on the first end. One end of the fixing area is provided with an end fixing member that can be detachably connected to the end cap. The other end of the fixing area is provided with a demolding retaining ring that allows the cylindrical mold to pass through while restricting the longitudinal displacement of the composite material cylinder along the demolding guide rail. The end cap includes a covering part and a connecting part that are sleeved on the first end and cover the composite material cylinder, and a connecting part for connecting with the end fixing member.

[0007] As a further improvement to the above solution:

[0008] The connecting part is provided with internal threads, and the end fixing part includes an end cover plate and a locking nut that can pass through the end cover plate and be threadedly connected to the connecting part. The locking nut is provided with a clearance hole to avoid interference with the first end. The end cover plate is detachably connected to the guide block. The demolding retaining ring is detachably connected to the guide block. The composite material cylinder is provided with an inner guide rail, and the demolding retaining ring is provided with a stop block that can abut against the end face of the inner guide rail.

[0009] The fixed area is provided with several height adjustment brackets, each including two symmetrically arranged adjustment parts and a support part disposed between the two adjustment parts for supporting the composite material cylinder; the adjustment parts are movably connected to the guide block and can reciprocate along the width direction; the adjustment parts are provided with a first inclined surface that gradually rises along the width direction of the demolding guide rail, and the adjustment parts are provided with a second inclined surface that can be adapted to the first inclined surface, so that by controlling the adjustment parts to move back and forth along the width direction of the guide block, the support part can be adjusted to rise and fall along the height direction of the guide block.

[0010] The driving mechanism includes a hydraulic cylinder for pulling the mold and a hydraulic cylinder mounting frame that is slidably connected to the guide block and can slide back and forth along the length of the guide block; the cylinder body of the hydraulic cylinder is fixedly connected to the hydraulic cylinder mounting frame, and multiple sets of hydraulic cylinder fixing assemblies are spaced apart along the length of the guide block on the traction area, and the hydraulic cylinder mounting frame is detachably connected to the guide block through the hydraulic cylinder fixing assemblies.

[0011] The drive mechanism also includes a flexible adapter assembly. The telescopic rod of the hydraulic cylinder is detachably connected to the second end via the flexible adapter assembly. The flexible adapter assembly includes a first adapter plate detachably connected to the telescopic rod and a second adapter plate detachably connected to the second end. A plurality of flexible lead screws are provided between the second adapter plate and the first adapter plate. Both the first and second adapter plates are provided with mounting holes that can be clearance-fitted with the flexible lead screws. The flexible lead screws are fixed by setting nuts after passing through the mounting holes.

[0012] The flexible cylinder fixing assembly also includes a third adapter plate and an adapter plate trailer. The third adapter plate is movably connected to the adapter plate trailer with an adjustable installation height. The adapter plate trailer is slidably connected to the guide block and can reciprocate along the length of the guide block. The third adapter plate is located between the first adapter plate and the second adapter plate and is also threadedly connected to the flexible lead screw.

[0013] The flexible lead screw includes a first flexible lead screw disposed between a first transfer plate and a third transfer plate, and a second flexible lead screw disposed between a third transfer plate and a second transfer plate; both the first and second flexible lead screws are movably connected to the third transfer plate, so that the connection length between the hydraulic cylinder and the mold is adjustable; the third transfer plate can rotate along the width direction of the demolding guide rail.

[0014] A method for demolding a composite material cylinder, using the aforementioned demolding fixture, includes the following steps:

[0015] S1. When performing the composite material cylinder molding process, the end cap is fixed on the first end of the mold and carried out together, so that the covering part of the end cap and the mold together cover the composite material cylinder to form a sleeve fixation.

[0016] S2. Place the composite material cylinder to be demolded in the fixed area, and make the second end pass through the center hole of the demolding retaining ring and connect it to the drive mechanism. The connecting part of the end cap is connected to the end fixing part.

[0017] S3. Start the drive mechanism to pull the mold from the composite material cylinder towards the traction area until it is completely removed;

[0018] S4. Remove the end caps covering the composite material cylinder to complete the demolding.

[0019] In step S2, based on the structural dimensions of the composite material cylinder and the mold, the height of the height adjustment bracket in the fixed area and the height position of the third adapter plate in the drive mechanism are adjusted so that after the composite material cylinder is placed in the fixed area, the third adapter plate, the demolding retaining ring and the mold can be in a coaxial state; the telescopic rod of the hydraulic cylinder in the drive mechanism is set to the extended state, and by adjusting the nuts on the first flexible lead screw and the second flexible lead screw, the hydraulic cylinder and the mold are in a suitable connection distance, and the cylinder body of the hydraulic cylinder is fixed on the demolding guide rail by the hydraulic cylinder fixing assembly.

[0020] In step S3, the hydraulic cylinder in the drive mechanism is activated to retract the telescopic rod, and the flexible transfer assembly applies traction force to the mold for demolding. After the telescopic rod of the hydraulic cylinder has completed its retraction stroke, the temporary fasteners fixing the hydraulic cylinder mounting bracket are removed, the telescopic rod is extended again, and the hydraulic cylinder mounting bracket is moved in the direction of mold traction until the telescopic rod is fully extended. Then, the cylinder body of the hydraulic cylinder is fixed on the demolding guide rail by the hydraulic cylinder fixing assembly. The above steps are repeated until the mold is completely demolded.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] This invention proposes a demolding fixture and method for composite material cylinders. During demolding, the composite material cylinder to be demolded is placed in the fixed area of ​​the demolding guide rail. The end caps on the composite material cylinder are connected to the end fixing members. Through the end fixing members, a tensile force is generated on the composite material cylinder during demolding. The other end of the composite material cylinder abuts against the demolding retaining ring. During demolding, the demolding retaining ring applies a pressure to the composite material cylinder. By demolding the composite material cylinder by applying pressure at the front end and tension at the rear end, the local stress on the composite material cylinder can be effectively dispersed, avoiding excessive stress concentration on the composite material cylinder during demolding and causing damage. This allows the composite material cylinder to withstand a larger demolding force during demolding, improving demolding efficiency.

[0023] By setting a stop block on the demolding retaining ring that matches the inner guide rail of the composite material cylinder, the demolding retaining ring can simultaneously block the end face of the cylinder and the inner guide rail during demolding, thus preventing the inner guide rail from being sheared during mold dragging and causing the inner guide rail and the composite material cylinder to delaminate.

[0024] By setting a height adjustment bracket, the demolding retaining ring and the end cover plate can be detachably connected, and the third adapter plate can be rotated so that the tooling can adapt to the demolding of composite material cylinders of different diameters, which has good applicability.

[0025] By setting a flexible lead screw to connect the hydraulic cylinder and the mold, damage to the composite material cylinder or body is avoided due to misalignment between the telescopic rod and the mold, thereby improving the success rate of demolding and the ease of operation.

[0026] By setting the hydraulic cylinder mounting bracket to slide in connection with the guide block, after the hydraulic cylinder's telescopic rod completes its stroke, continuous demolding can be achieved by adjusting the position of the hydraulic cylinder mounting bracket. By setting temporary fasteners to fix the hydraulic cylinder mounting bracket, the hydraulic cylinder mounting bracket can achieve stepless adjustment, which significantly improves demolding efficiency and reduces equipment costs. Attached Figure Description

[0027] Figure 1 This is a perspective view of a demolding fixture for a composite material cylinder in an embodiment of the device.

[0028] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 This is a schematic cross-sectional view of the connection at the first end of the mold in the embodiment of the device.

[0030] Figure 4 This is a schematic diagram of the height adjustment bracket in the embodiment of the device;

[0031] Figure 5 This is a schematic diagram of the structure in the device embodiment showing the displacement of the adjustment section towards the center of the demolding track;

[0032] Figure 6 yes Figure 1 A magnified view of a section at point C.

[0033] Figure 7 yes Figure 1 A magnified view of a section at point B.

[0034] Figure 8 This is a partial perspective view illustrating the connection of the second end of the mold in the device embodiment.

[0035] Figure 9 This is a schematic diagram of the structure at the end of the composite material cylinder in the embodiment of the device.

[0036] Figure 10 This is a schematic diagram of the demolding retaining ring in the embodiment of the device.

[0037] Figure 11 This is a schematic three-dimensional view of the flexible adapter component in the device embodiment.

[0038] Figure 12 This is a schematic three-dimensional view of the structure in which the flexible lead screw in the flexible adapter assembly of the device embodiment is misaligned.

[0039] The labels in the diagram represent:

[0040] 1. Mold; 11. First end; 12. Second end; 13. End cap; 131. Covering part; 132. Connecting part; 2. Composite material cylinder; 21. Inner guide rail; 31. Guide block; 32. Fixing area; 33. Traction area; 4. End fixing part; 41. End cover plate; 42. Locking nut; 43. Clearance hole; 5. Demolding retaining ring; 51. Stop block; 6. Height adjustment bracket; 61. Adjustment part; 62. Support part; 63. Waist hole; 7. Drive mechanism; 71. Hydraulic cylinder mounting bracket; 72. Hydraulic cylinder fixing assembly; 73. Cylinder body; 74. Telescopic rod; 8. Flexible transfer assembly; 81. First transfer plate; 82. Second transfer plate; 83. Third transfer plate; 84. First flexible lead screw; 85. Second flexible lead screw; 86. Transfer plate trailer. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Device Example:

[0043] Figures 1 to 12An embodiment of a demolding fixture for a composite material cylinder according to the present invention is shown, including a demolding guide rail and a mold 1. The outer periphery of the mold 1 is covered with the composite material cylinder 2 to be demolded. The demolding guide rail includes two sets of spaced guide blocks 31, a fixing area 32 for fixing the composite material cylinder 2, and a traction area 33 for pulling out the cylindrical mold 1 inside the composite material cylinder 2 to complete the demolding. The fixing area 32 and the traction area 33 are located between the two guide blocks 31. The mold 1 includes a first end 11 and a second end 12. An end cap 13 is provided on the first end 11. One end of the fixing area 32 is provided with an end fixing member 4 that can be detachably connected to the end cap 13. The other end of the fixing area 32 is provided with a demolding retaining ring 5 that allows the cylindrical mold 1 to pass through and restricts the longitudinal displacement of the composite material cylinder 2 along the demolding guide rail. The end cap 13 includes a covering part 131 and a connecting part 132 that are sleeved on the first end 11 and covered inside the composite material cylinder 2. The covering part 131 and the connecting part 132 are connected to the end fixing member 4. In this structure, an end cap 13 is provided on the mold 1. The end cap 13 is sleeved on the first end 11. During the molding process of the composite material, the end cap 13 is wrapped inside the composite material cylinder 2 to form a covering structure, thereby fixing the end cap 13 between the composite material cylinder 2 and the mold 1. During demolding, the composite material cylinder 2 to be demolded is placed in the fixed area 32 of the demolding guide rail. The end cap 13 on the composite material cylinder to be demolded is connected to the end fixing member 4. Through the end fixing member 4, a tensile force is formed on the composite material cylinder 2 during demolding. The other end of the composite material cylinder 2 abuts against the demolding retaining ring. During demolding, the demolding retaining ring will apply a pressure to the composite material cylinder 2. By demolding the composite material cylinder 2 by using the method of front-end compression and rear-end tension, the local stress of the composite material cylinder 2 can be effectively dispersed, avoiding excessive force concentration on the composite material cylinder 2 during demolding and causing damage. This allows the composite material cylinder 2 to withstand a larger demolding force during demolding, improving demolding efficiency.

[0044] In this embodiment, the connecting part 132 is provided with an internal thread, and the end fixing member 4 includes an end cover plate 41 and a locking nut 42 that can pass through the end cover plate 41 and be threadedly connected to the connecting part 132. The locking nut 42 is provided with a clearance hole 43 to avoid interference with the first end 11. The end cover plate 41 is detachably connected to the guide block 31. In this structure, the end cap 13 is sleeved on the mold 1. When the composite material cylinder 2 is being molded and processed, it can provide a force point for the fiber yarn to turn. The covering part 131 is set as a cone with a maximum diameter slightly smaller than the outer diameter of the composite material cylinder 2 to improve the connection stability between the end cap 13 and the composite material cylinder 2 when the mold is lifted and demolded. By setting the locking nut 42 to be threadedly connected to the connecting part 132 and the locking nut 42 is provided with a clearance hole 43, the mold 1 is not connected to the end fixing member 4 or the end cap 13 when demolding, ensuring that the mold 1 can be demolded smoothly.

[0045] In this embodiment, the composite material cylinder 2 is provided with an inner guide rail 21, and the demolding retaining ring is provided with a stop block 51 that can abut against the end face of the inner guide rail 21. The demolding retaining ring 51 and the guide block 31 are detachably connected. In this structure, the demolding retaining ring 5 can simultaneously block the end face of the cylinder and the inner guide rail 21 during demolding, preventing the mold 1 from shearing the inner guide rail 21 and causing delamination between the inner guide rail 21 and the composite material cylinder 2. By setting the demolding retaining ring and the guide block 31 to be detachably connected, the demolding of other composite material cylinders 2 with large length-to-diameter ratios and different diameters can be applied simply by replacing the demolding retaining ring, thus improving the applicability of the device.

[0046] In this embodiment, a plurality of height-adjustable brackets 6 are provided on the fixed area 32. Each height-adjustable bracket 6 includes two symmetrically arranged adjusting parts 61 and a support part 62 disposed between the two adjusting parts 61 for supporting the composite material cylinder 2. The adjusting parts 61 are movably connected to the guide block 31 and can reciprocate along the width direction. The adjusting parts 61 are provided with a first inclined surface that gradually rises along the width direction of the demolding guide rail, and a second inclined surface that can be adapted to the first inclined surface. This allows the support part 62 to be adjusted in the height direction of the guide block 31 by controlling the back-and-forth movement of the adjusting parts 61 along the width direction of the guide block 31. Specifically, the adjusting parts 61 and the support part 62 are detachably connected by bolts. Long strip-shaped waist holes 63 for bolt connection are provided on the first inclined surface, the second inclined surface, and the guide block 31. In this structure, the installation height of the support 62 is increased by moving the adjustment part 61 along the middle of the demolding guide rail, and the installation height of the support 62 is decreased by moving the adjustment part 61 along the side of the demolding guide rail, thereby further improving the applicability of the device.

[0047] In this embodiment, a hydraulic cylinder for traction of the mold 1 is provided in the traction zone 33. A hydraulic cylinder mounting frame 71 is provided on the traction zone 33, which is slidably connected to the guide block 31 and can slide back and forth along the length direction of the guide block 31. The cylinder body 73 is fixedly connected to the hydraulic cylinder mounting frame 71. Multiple sets of hydraulic cylinder fixing assemblies 72 are provided on the traction zone 33 along the length direction of the guide block 31. The hydraulic cylinder mounting frame 71 is detachably connected to the guide block 31 through the hydraulic cylinder fixing assemblies 72. In this structure, because the extension stroke of the hydraulic cylinder is usually short, it cannot meet the requirement of demolding the composite material cylinder 2 with a single contraction. By setting the hydraulic cylinder mounting frame 71, after the extension rod 74 of the hydraulic cylinder has completed its stroke, continuous demolding can be achieved by adjusting the position of the hydraulic cylinder mounting frame 71, which improves demolding efficiency and reduces equipment costs.

[0048] In this embodiment, the telescopic rod 74 of the hydraulic cylinder is detachably connected to the second end 12 via a flexible adapter assembly 8. The flexible adapter assembly 8 includes a first adapter plate 81 detachably connected to the telescopic rod 74 and a second adapter plate 82 detachably connected to the second end. A plurality of flexible lead screws are provided between the second adapter plate 82 and the first adapter plate 81. Both the first adapter plate 81 and the second adapter plate 82 are provided with mounting holes that can be clearance-fitted with the flexible lead screws. After the flexible lead screws pass through the mounting holes, they are fixed by nuts. In this structure, if the hydraulic cylinder is directly connected to the mold 1, any deviation in the coaxiality between the mold 1 and the hydraulic cylinder can easily damage the hydraulic cylinder during demolding. By setting flexible lead screws to avoid direct connection between the telescopic rod 74 and the mold 1, a certain adjustment function can be provided when there is a deviation in the coaxiality between the mold 1 and the hydraulic cylinder. By tightening and loosening the nuts on the flexible lead screws, the connection length between the hydraulic cylinder and the mold 1 can be infinitely adjusted, improving the structural stability of the device, further reducing the difficulty of demolding, and increasing the success rate of demolding.

[0049] In this embodiment, the flexible cylinder fixing assembly 72 further includes a third adapter plate 83 and an adapter plate trailer 86. The third adapter plate 83 is movably connected to the adapter plate trailer 86 with adjustable mounting height. The adapter plate trailer 86 is slidably connected to the guide block 31 and can reciprocate along the length direction of the guide block 31. The third adapter plate 83 is disposed between the first adapter plate 81 and the second adapter plate 82, and is also threadedly connected to the flexible lead screw. Specifically, the third adapter plate 83 is fixedly connected to a mounting bracket, and the mounting bracket is threadedly connected to the adapter plate trailer 86 via a height adjusting bolt. In this structure, the length of the flexible lead screw can be further increased by setting the adapter plate trailer 86, providing adjustment space when there is a deviation in the coaxiality between the mold 1 and the oil cylinder, and avoiding damage to the oil cylinder due to the non-axial direction of the demolding force of the oil cylinder being stuck by the demolding force during demolding; furthermore, by setting the third adapter plate 83 to be rotatable, the height of the axis of the third adapter plate 83 can be adjusted to adapt to composite material cylinders 2 of different sizes, further improving the applicability of the device, and the structure is simple.

[0050] In this embodiment, the flexible lead screw includes a first flexible lead screw 84 disposed between the first adapter plate 81 and the third adapter plate 83, and a second flexible lead screw 85 disposed between the third adapter plate 83 and the second adapter plate 82. Both the first flexible lead screw 84 and the second flexible lead screw 85 are movably connected to the third adapter plate 83, making the connection length between the hydraulic cylinder and the mold 1 adjustable. The third adapter plate 83 can rotate along the width direction of the demolding guide rail. In this structure, by providing the first flexible lead screw 84 and the second flexible lead screw 85, the connection length between the hydraulic cylinder and the mold 1 can be adjusted steplessly more conveniently. The fact that the third adapter plate 83 can rotate along the width direction of the demolding guide rail allows for appropriate adjustment when the connecting lead screws are not parallel, improving the working stability of the hydraulic cylinder.

[0051] Method Implementation Examples:

[0052] A method for demolding a composite material cylinder, using the demolding fixture in the apparatus embodiment, includes the following steps:

[0053] S1. During the molding process of the composite material cylinder 2, the end cap 13 is fixed on the first end 11 of the mold 1 and carried out together, so that the covering part 131 of the end cap 13 and the mold 1 together cover the composite material cylinder 2, forming a sleeve fixation.

[0054] S2. Place the composite material cylinder 2 to be demolded in the fixing area 32, and make the second end pass through the center hole of the demolding retaining ring and connect it with the drive mechanism 7. The connecting part 132 of the end cap 13 is connected to the end fixing part 4.

[0055] S3. Start the drive mechanism 7 to pull the mold 1 from the composite material cylinder 2 into the traction zone 33 until it is completely removed.

[0056] S4. Remove the end caps 13 encased in the composite material cylinder 2 to complete demolding.

[0057] In this embodiment, in step S2, the height of the height adjustment bracket 6 in the fixed area 32 and the third adapter plate 83 in the drive mechanism 7 are adjusted according to the structural dimensions of the composite material cylinder 2 and the mold 1, so that after the composite material cylinder 2 is placed in the fixed area 32, the third adapter plate 83, the demolding retaining ring and the mold 1 can be in a coaxial state; the telescopic rod 74 of the hydraulic cylinder in the drive mechanism 7 is set to the extended state, and the nut on the first flexible lead screw 84 and the second flexible lead screw 85 is adjusted to make the hydraulic cylinder and the mold 1 have a suitable connection distance, and the cylinder body 73 of the hydraulic cylinder is fixed on the demolding guide rail by the hydraulic cylinder fixing assembly 72.

[0058] In this embodiment, in step S3, the hydraulic cylinder in the drive mechanism 7 is activated to retract the telescopic rod 74, and the flexible transfer component 8 applies traction force to the mold 1 for demolding. After the telescopic rod 74 of the hydraulic cylinder has completed its retraction stroke, the temporary fasteners fixing the hydraulic cylinder mounting bracket 71 are removed, the telescopic rod 74 is extended again, and the hydraulic cylinder mounting bracket 71 is moved in the traction direction of the mold 1 until the telescopic rod 74 is fully extended. Then, the cylinder body 73 of the hydraulic cylinder is fixed on the demolding guide rail by the hydraulic cylinder fixing component 72. The above steps are repeated until the mold 1 is completely demolded.

[0059] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A demolding fixture for a composite material cylinder, characterized in that: The device includes a demolding guide rail and a mold (1), the outer periphery of which is covered by a composite material cylinder (2) to be demolded; the demolding guide rail includes two sets of spaced guide blocks (31), a fixing area (32) for fixing the composite material cylinder (2), and a traction area (33) for pulling the mold (1) out of the composite material cylinder (2) to complete the demolding, the traction area (33) is provided with a drive mechanism (7) for providing traction driving force; the fixing area (32) and the traction area (33) are located between the two guide blocks (31); the mold (1) includes a first end (11) and a second end (12), and so on. An end cap (13) is provided on the first end (11), and an end fixing member (4) is provided at one end of the fixing area (32) that can be detachably connected to the end cap (13). A demolding retaining ring (5) is provided at the other end of the fixing area (32) that allows the mold (1) to pass through and restricts the longitudinal displacement of the composite material cylinder (2) along the demolding guide. The end cap (13) includes a covering part (131) and a connecting part (132) which are sleeved on the first end (11) and covered inside the composite material cylinder (2) and a connecting part (132) for connecting to the end fixing member (4). The connecting part (132) is provided with internal threads. The end fixing member (4) includes an end cover plate (41) and a locking nut (42) that can pass through the end cover plate (41) and be threadedly connected to the connecting part (132). The locking nut (42) is provided with a clearance hole (43) that can avoid interference with the first end (11). The end cover plate (41) is detachably connected to the guide block (31). The demolding retaining ring (5) is detachably connected to the guide block (31). The composite material cylinder (2) is provided with an inner guide rail (21). The demolding retaining ring is provided with a stop block (51) that can abut against the end face of the inner guide rail (21). The fixed area (32) is provided with several height adjustment brackets (6). Each height adjustment bracket (6) includes two symmetrically arranged adjustment parts (61) and a support part (62) arranged between the two adjustment parts (61) for supporting the composite material cylinder (2). The adjustment parts (61) are movably connected to the guide block (31) and can move back and forth along the width direction. The adjustment parts (61) are provided with a first inclined surface that gradually rises along the width direction of the demolding guide rail. The support part (62) is provided with a second inclined surface that can be adapted to the first inclined surface. By controlling the adjustment parts (61) to move back and forth along the width direction of the guide block (31), the support part (62) can be adjusted to rise and fall along the height direction of the guide block (31).

2. The demolding fixture for the composite material cylinder according to claim 1, characterized in that: The drive mechanism (7) includes a hydraulic cylinder for traction mold (1) and a hydraulic cylinder mounting bracket (71) that is slidably connected to the guide block (31) and can slide back and forth along the length direction of the guide block (31); the cylinder body (73) of the hydraulic cylinder is fixedly connected to the hydraulic cylinder mounting bracket (71), and multiple sets of hydraulic cylinder fixing assemblies (72) are spaced apart along the length direction of the guide block (31) on the traction area (33), and the hydraulic cylinder mounting bracket (71) is detachably connected to the guide block (31) through the hydraulic cylinder fixing assemblies (72).

3. The demolding fixture for the composite material cylinder according to claim 2, characterized in that: The drive mechanism (7) further includes a flexible adapter assembly (8). The telescopic rod (74) of the oil cylinder is detachably connected to the second end (12) through the flexible adapter assembly (8). The flexible adapter assembly (8) includes a first adapter plate (81) detachably connected to the telescopic rod (74) and a second adapter plate (82) detachably connected to the second end. A plurality of flexible lead screws are provided between the second adapter plate (82) and the first adapter plate (81). Both the first adapter plate (81) and the second adapter plate (82) are provided with mounting holes that can be clearance-fitted with the flexible lead screws. The flexible lead screws are fixed by setting nuts after passing through the mounting holes.

4. The demolding fixture for the composite material cylinder according to claim 3, characterized in that: The cylinder fixing assembly (72) also includes a third adapter plate (83) and an adapter plate trailer (86). The third adapter plate (83) is movably connected to the adapter plate trailer (86) with adjustable installation height. The adapter plate trailer (86) is slidably connected to the guide block (31) and can reciprocate along the length direction of the guide block (31). The third adapter plate (83) is located between the first adapter plate (81) and the second adapter plate (82), and is also threadedly connected to the flexible lead screw.

5. The demolding fixture for the composite material cylinder according to claim 4, characterized in that: The flexible lead screw includes a first flexible lead screw (84) disposed between the first adapter plate (81) and the third adapter plate (83) and a second flexible lead screw (85) disposed between the third adapter plate (83) and the second adapter plate (82); both the first flexible lead screw (84) and the second flexible lead screw (85) are movably connected to the third adapter plate (83), so that the connection length between the oil cylinder and the mold (1) is adjustable; The third adapter plate (83) can rotate along the width direction of the demolding guide rail.

6. A method for demolding a composite material cylinder, characterized in that: Using the demolding fixture according to any one of claims 1-5, the process includes the following steps: S1. When performing the molding process of composite material cylinder (2), the end cap (13) is fixed on the first end (11) of the mold (1) and carried out together, so that the covering part (131) of the end cap (13) and the mold (1) are covered in the composite material cylinder (2) together to form a sleeve fixation. S2. Place the composite material cylinder (2) to be demolded in the fixed area (32), and make the second end pass through the center hole of the demolding retaining ring and connect with the drive mechanism (7). The connecting part (132) of the end cap (13) is connected with the end fixing part (4). S3. Start the drive mechanism (7) to pull the mold (1) from the composite material cylinder (2) into the traction zone (33) until it is completely removed; S4. Remove the end cap (13) that is encased in the composite material cylinder (2) to complete the demolding.

7. The demolding method for the composite material cylinder according to claim 6, characterized in that: In step S2, according to the structural dimensions of the composite material cylinder (2) and the mold (1), the height adjustment bracket (6) in the fixed area (32) and the height position of the third adapter plate (83) in the drive mechanism (7) are adjusted so that after the composite material cylinder (2) is placed in the fixed area (32), the third adapter plate (83), the demolding retaining ring and the mold (1) can be in a coaxial state; the telescopic rod (74) of the oil cylinder in the drive mechanism (7) is set to the extended state, and by adjusting the nuts on the first flexible screw (84) and the second flexible screw (85), the oil cylinder and the mold (1) are in a suitable connection distance, and the cylinder body (73) of the oil cylinder is fixed on the demolding guide rail by the oil cylinder fixing assembly (72).

8. The demolding method for the composite material cylinder according to claim 7, characterized in that: In step S3, the cylinder in the drive mechanism (7) is activated to retract the telescopic rod (74) and apply traction force to the mold (1) through the flexible transfer assembly (8) for demolding. After the telescopic rod (74) of the cylinder has completed its retraction stroke, the temporary fasteners of the fixed cylinder mounting bracket (71) are removed, the telescopic rod (74) is extended again, and the cylinder mounting bracket (71) is moved in the traction direction of the mold (1) until the telescopic rod (74) is fully extended. Then, the cylinder body (73) of the cylinder is fixed on the demolding guide rail through the cylinder fixing assembly (72). The above steps are repeated until the mold (1) is completely demolded.

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