A winding mandrel for a fiber cloth tape with a tapered end

Abstract

The present application discloses a winding mandrel for a fiber cloth tape having a tapered end portion, which is divided into multiple separate structures along the circumferential direction and formed into an integral structure after being connected to a drive shaft. The winding mandrel is specifically divided into a tapered portion at both ends and a straight portion in the middle. The tapered portion and the straight portion are both divided into multiple monomers along the circumferential spacing, and the drive shaft and each monomer are threaded fitting structures. The structure of the winding bag disclosed in the present application is formed into a regular winding mandrel by a shaping ring and a drive shaft. The fiber cloth tape can be wound in this shaped state. When the fiber cloth tape glue is dry, the drive is removed and the drive ring is pulled, and the multiple monomers of the winding mandrel can be smoothly removed from the winding bag one by one. This solves the problem that the wooden mandrel or thin tube mandrel currently used for winding the fiber cloth tape of this structure is difficult to be removed from the fiber cloth tape, and the problem that the fiber cloth tape is easily cracked or broken is solved, thereby achieving the smooth forming of the fiber cloth tape of this structure.

Description

Technical Field

[0001] The present application relates to the technical field of fiber cloth tapes for titanium products, and in particular to a winding mandrel for a fiber cloth tape having a tapered end. Background Art

[0002] Titanium products offer excellent corrosion resistance, biocompatibility, and higher strength than typical metals, making them widely used in fields such as aviation and medicine. However, a drawback of titanium products is their poor ablation resistance, making them unsuitable for use in the flame nozzles of aircraft engines. Therefore, carbon fiber or other ablation-resistant fiber bags are typically wrapped into a cylindrical structure and, after a special process, embedded in the titanium flame nozzle to improve its ablation resistance.

[0003] The fiber cloth tape is formed by making a winding mandrel with the same internal structure as the corresponding titanium product, and wrapping the raw material of the fiber cloth tape (as shown in the attached manual) with the core rod. Figure 1 The carbon fiber tape is shown as a narrower width. After pre-impregnation (dip in glue), it is wound on a winding mandrel of designed shape (the mandrel is rotated by a drive shaft during winding). After winding, the pre-impregnated glue dries and a fiber cloth tape with a hard structure is formed. After the winding mandrel and the fiber cloth tape are separated, the finished fiber cloth tape is obtained.

[0004] For a fiber cloth tape having a straight section in the middle and tapered sections on both sides (structure such as Figure 2 As shown), the same winding mandrel also has this structure, which fits the inner wall of the fiber cloth tape. A drive shaft is also provided at the end of the winding mandrel. Through the rotation of the drive shaft, the pre-impregnated cloth bag is overlapped and wound on the winding mandrel at a certain tilt angle to wait for the glue to dry. For the fiber cloth tape of this structure, it has conical cylinder sections at both ends. When winding, the two ends of the winding mandrel are wrapped and wound. After the fiber cloth tape is dried, the opening diameter of the conical cylinder sections at both ends is small, and the winding mandrel of the same structure cannot be separated from it, that is, a single fiber cloth tape product cannot be achieved. Therefore, a wooden winding mandrel is usually used at present. After the fiber cloth tape is formed, the wooden winding mandrel is broken and cracked through the end of the fiber cloth tape. After it becomes a wood slag, it is separated from the fiber cloth tape. This operation greatly prolongs the molding cycle of the fiber cloth tape, and the fiber cloth tape is easily damaged during the operation of breaking it with external force, causing cracks and ruptures in the fiber cloth tape.

[0005] Alternatively, a winding mandrel with a thin tube structure may be used. After the fiber tape is formed, an external force may cause the mandrel to deform and shrink to a size smaller than the opening of the fiber tape, thereby achieving detachment. This method also causes damage to the fiber tape and greatly wastes the winding mandrel with a thin tube structure. Summary of the Invention

[0006] In response to the above-mentioned problems, the present application aims to provide a winding core rod for a fiber cloth tape with a tapered end, which can be smoothly removed from the formed fiber cloth tape, thereby solving the problem that the wooden core rod or thin tube core rod currently used for winding the fiber cloth tape of this structure is difficult to be smoothly removed from the fiber cloth tape, and is very likely to cause cracks or breakage in the fiber cloth tape, thereby achieving the smooth forming of the fiber cloth tape of this structure.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is as follows: a winding mandrel of a fiber cloth tape with a tapered end, the fiber cloth tape formed by winding has a straight tube section in the middle and tapered tube sections on both sides, the winding mandrel fits the inner wall of the fiber cloth tape, and a drive shaft is also provided at the end of the winding mandrel, which is characterized in that: the winding mandrel is divided into multiple split structures along the circumferential direction, and is connected to the drive shaft to form an integral structure.

[0008] Preferably, the winding mandrel is divided into conical parts at both ends and a straight part in the middle, and both the conical part and the straight part are divided into a plurality of monomers along the circumferential spacing.

[0009] Preferably, the drive shaft and each monomer are threaded fitting structures, and when each monomer is fitted with the drive shaft, an offset gap is reserved between adjacent monomers along the circumferential direction.

[0010] Preferably, an annular embedding groove is opened at the adjacent side edges of the cone and straight body monomers, and a shaping ring is embedded in the annular embedding groove to pre-position the cone and straight body monomers, and the width of the shaping ring is less than twice the width of the annular embedding groove.

[0011] Preferably, the annular embedding groove is provided on the outer wall of the cone portion at one end away from the driving shaft, and the driving ring is tightly embedded in the annular embedding groove.

[0012] Preferably, a disassembly hole is provided on the inner wall of one or more of the cone parts connected to the drive ring, and the disassembly hole is inclined toward the outside of the cone part.

[0013] The beneficial effects of the present application are as follows: the structure of the winding cloth bag disclosed in the present application sets the winding mandrel as a combination structure of multiple monomers, and the multiple monomers can be shaped into a regular winding mandrel by a shaping ring and a driving shaft. The fiber cloth tape can be wound in this shaped state. When the fiber cloth tape glue is dry, the driving ring is removed and pulled to smoothly remove the multiple monomers of the winding mandrel from the winding cloth bag one by one, thereby solving the problem that the wooden mandrel or thin tube mandrel currently used for winding the fiber cloth tape of this structure is difficult to be removed smoothly from the fiber cloth tape, and is very likely to cause cracks or ruptures in the fiber cloth tape, thereby realizing the smooth molding of the fiber cloth tape of this structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the carbon fiber tape for this application.

[0015] Figure 2 This is a structural diagram of the fiber cloth tape wound and formed in this application.

[0016] Figure 3 This is the overall structural diagram of the winding mandrel for this application.

[0017] Figure 4 For this application Figure 3 Center A view.

[0018] Figure 5 This is a schematic diagram of the multiple constituent units of the cone portion of the present application being offset and tightened inward.

[0019] Figure 6 This is a structural diagram of the annular embedded groove in the cone part of this application.

[0020] Figure 7 This is the structural diagram of the shaping ring of this application (the left side of the figure is the planar structural diagram, and the right side is the side view).

[0021] Figure 8 This is the overall structural diagram of the winding mandrel equipped with a shaping ring and a driving ring for this application.

[0022] Figure 9 This is a diagram of the fiber bag and winding mandrel wrapping for this application.

[0023] Figure 10 For this application Figure 9 Schematic diagram of the process of removing the winding mandrel.

[0024] Figure 11 This is a schematic diagram of the disassembly of a single cone part for this application.

[0025] Figure 12 This is the finished product structure diagram of the fiber cloth belt for this application.

[0026] In the figure: 6-carbon fiber belt; 7-hook body. DETAILED DESCRIPTION

[0027] In order to enable ordinary technicians in this field to better understand the technical solution of the present application, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Refer to the attached Figures 1 to 12 The winding mandrel of a fiber cloth tape with a tapered end is shown, and the raw material of the winding is as follows Figure 1 The figure shows a narrow carbon fiber tape, which is pre-impregnated (dipped in glue) and then wound onto a winding mandrel of a designed shape. After the pre-impregnated glue dries, a fiber cloth tape with a hard structure is formed. After the winding mandrel and the fiber cloth tape are separated, the finished fiber cloth tape is achieved.

[0029] The fiber cloth tape to be formed in this application has a straight section 1a in the middle and tapered sections 1b on both sides, and the structure is as follows: Figure 2 As shown, in order to solve the problem that the current wooden or metal thin cylindrical winding mandrels greatly prolong the molding cycle of the fiber cloth tape, cause cracks and breakages in the fiber cloth tape, and cause great waste problems for the winding mandrels with thin cylindrical structures. The winding mandrel structure designed in this application is as follows Figure 3 、 10 As shown, it is divided into multiple separate structures along the circumferential direction and connected to the drive shaft 3 to form an integral structure. When winding the fiber tape, the drive shaft 3 is connected to the winding mandrel of the separate structure, so that the winding mandrel forms an integral structure to support the winding of the fiber tape. After the fiber tape glue is dried, it is separated from the winding mandrel by the drive shaft 3. After separation, the winding mandrel is formed into multiple separate structures, which can be smoothly removed from the opening of the fiber tape in sequence. On the basis of completing the winding, the winding mandrel and the fiber tape can be smoothly and quickly separated at the same time.

[0030] Specifically, such as Figure 3 As shown, the winding mandrel 2 is divided into a conical portion 21 at both ends and a straight portion 22 in the middle. The conical portion 21 and the straight portion 22 are divided into multiple monomers along the circumferential spacing. Each of the divided monomers is smaller than the opening of the fiber tape and can be smoothly removed and detached. In order to facilitate the connection of multiple monomers into a whole winding mandrel through the drive shaft 3, as shown in FIG. Figure 3 As shown, the drive shaft 3 and each monomer are threaded fitting structures, each monomer is threadedly fitted on the drive shaft 3, and each monomer is wrapped and tightened when the carbon fiber tape is wound, while the fiber tape is shaped.

[0031] In order to separate the fiber tape after the glue is dried, a misalignment gap 2a is reserved between the adjacent monomers along the circumferential direction when each monomer is matched with the drive shaft 3. When separating, the drive shaft 3 is rotated in the opposite direction to separate it from the winding mandrel and the fiber tape. Figure 4 As shown in the state, each monomer separated from the drive shaft 3 has no support, and under the structure of the adjacent offset gap 2a, each monomer moves toward the center, reducing the outer diameter of the entire winding mandrel ( Figure 5 The middle dotted line a is the outer peripheral surface of the wound core rod in the normal supporting state), and each monomer is a split structure, so they can be taken out one by one from the end of the fiber tape.

[0032] Since the winding mandrel is divided into multiple monomer structures, it is difficult to match the thread of the drive shaft 3. Therefore, in order to solve this problem, Figure 6As shown, annular insertion grooves 2b are provided on adjacent sides of the cone-shaped body 21 and the straight body 22. A shaping ring 4 is embedded within the annular insertion grooves 2b to pre-position the cone-shaped body 21 and the straight body 22. During operation, one side of the shaping ring 4 is first inserted into the annular insertion grooves 2b of each cell of the straight body 22 to shape the straight body 22. Each cell of the cone-shaped body 21 is then sleeved onto the other side of the shaping ring 4 to shape the entire winding mandrel. The drive shaft is then slowly rotated and inserted into the winding mandrel, and the fiber tape winding operation can then begin.

[0033] Since the winding bag wraps and tightens the winding mandrel of the split structure after winding and forming, the conical part 21 and the straight body part 22 are difficult to separate as a single body under the shaping effect of the shaping ring 4. Therefore, the width of the shaping ring 4 is set to be less than twice the width of the annular embedding groove 2b, that is, in the process of jointly shaping the conical part 21 and the straight body part 22 by the shaping ring 4, the shaping ring 4 does not contact the inner bottom surface of the annular embedding groove 2b of the conical part 21 and the straight body part 22, and the conical part 21 and the straight body part 22 are positioned with the drive shaft 3 through threaded cooperation. After driving the shaft 3, shake the winding bag left and right to achieve the separation of the shaping ring 4 from the cone part 21 and the straight body part 22 (the width of the preferably shaped ring 4 embedded in the annular embedding groove 2b on each side is 2 mm, and there is a movable gap between the circumferential surface of the annular embedding groove 2b. During the shaking of the winding bag, the shaped ring 4 can be smoothly separated from the shaping ring 4 and the cone part 21 and fall off). After taking out each monomer from the fiber cloth belt port, take out the shaping ring 4 again (the shaping ring 4 is preferably made of rubber and can be bent and deformed to facilitate removal from the fiber cloth belt port).

[0034] In order to further assist the separation of the shaping ring 4 from the cone parts 21 and the straight parts 22 on both sides, as shown in FIG. Figure 8 As shown, the outer wall of the conical portion 21, which is away from the end through which the drive shaft 3 passes, is provided with the annular insertion groove 2b, and a drive ring 5, which can be disengaged by external force, is tightly embedded in the annular insertion groove 2b. During operation, the drive ring 5 is first pulled from the outside, driving the conical portion 21 on that side away from the straight body portion 22. After the distance between the two increases, the shaping ring 4 and the conical portion 21 are preferentially separated. The drive ring 5 is then pulled further, and the drive ring 5 is separated from the conical portion 21 under the restriction of the fiber cloth end. As a result, the conical portion 21 on that side loses its shaping function and becomes a plurality of dispersed individual units, which can then be removed one by one. The outer drive ring 5 can then be removed by shaking the limiting bag or using tweezers. The straight body portion 22 then becomes a separate structure and can be removed one by one. The conical portion 21 on the other side is removed one by one in the same way, completing the removal operation of the entire winding mandrel.

[0035] In order to further facilitate the disassembly of the cone portion 21, as shown in FIG. Figure 11As shown, a disassembly hole 2a is opened on the inner wall of one or more cone portions 21 connected to the drive ring 5. After the drive shaft 3 is disassembled, the hook 7 can be optionally embedded in the disassembly hole 2a to pull out a single cone portion 21, so that the single cone portion 21 can be separated from the wrapped cloth bag, and then the remaining cone portions 21 can be smoothly taken out.

[0036] In order to further improve the removal efficiency of the single cone portion 21, it is preferred that Figure 11 As shown, the disassembly hole 2a is tilted toward the outside of the cone 21. Since the diameter of the two sides of the formed fiber bag is reduced, the single cone 21 can be pulled by the hook body in combination with the tilted disassembly hole 2a. Figure 11 Pull it out in the direction of the middle arrow, while also preventing the hook body from separating from the disassembly hole 2a.

[0037] The principle of the present application is as follows: according to the structure of the winding bag disclosed in the present application, the winding mandrel is set to a plurality of monomer combination structures, and the plurality of monomers can be shaped into a regular winding mandrel by the shaping ring 4 and the driving shaft 3. The fiber tape winding operation can be carried out in this shaped state. When the fiber tape glue is dry, the driving shaft 3 is first rotated in the opposite direction to be taken out, and then the driving ring 5 is pulled from the outside to drive the cone portion 21 on this side away from the straight body portion 22. After the distance between the two increases, the shaping ring 4 and the cone portion 21 are separated first, and the driving ring 5 is continued to be pulled to separate the driving ring 5 from the cone portion 21 under the restriction of the fiber tape port. As a result, the cone portion 21 on this side loses its shaping effect and becomes a plurality of dispersed monomers, which can then be taken out one by one. Then, the outer driving ring 5 can be taken out by shaking the limiting bag or using tweezers, and then the straight body portion 22 is divided into a structure and can be taken out one by one. The cone portion 21 on the other side is taken out one by one in the same way to complete the removal operation of the entire winding mandrel.

[0038] The above shows and describes the basic principles, main features and advantages of this application. Without departing from the spirit and scope of this application, this application will also have various changes and improvements, which fall within the scope of this application.

Claims

1. A winding mandrel for a fiber tape with a tapered end, wherein the fiber tape (1) formed by winding has a straight tube section (1a) in the middle and tapered tube sections (1b) on both sides, the winding mandrel (2) is in contact with the inner wall of the fiber tape (1), and a drive shaft (3) is further provided at the end of the winding mandrel (2), characterized in that: The winding mandrel (2) is divided into a plurality of separate structures along the circumferential direction, and is connected to the driving shaft (3) to form an integral structure; The winding mandrel (2) is divided into cone portions (21) at both ends and a straight portion (22) in the middle, and both the cone portion (21) and the straight portion (22) are divided into a plurality of monomers along a circumferential spacing; The drive shaft (3) and each monomer are threadedly matched structures, and when each monomer is matched with the drive shaft (3), a dislocation gap (2a) is reserved between adjacent monomers in the circumferential direction; Annular embedding grooves (2b) are provided at adjacent sides of the cone portion (21) and the straight portion (22), and a shaping ring (4) for pre-positioning the cone portion (21) and the straight portion (22) is embedded in the annular embedding groove (2b), wherein the width of the shaping ring (4) is less than twice the width of the annular embedding groove (2b).

2. The winding mandrel according to claim 1, characterized in that: The annular embedding groove (2b) is provided on the outer wall of the cone portion (21) at one end away from the driving shaft (3), and a driving ring (5) that can be separated by external force is tightly embedded in the annular embedding groove (2b).

3. The winding mandrel according to claim 2, characterized in that: A disassembly hole is provided on the inner wall of one or more cone parts (21) connected to the drive ring (5), and the disassembly hole is arranged obliquely toward the outside of the cone part (21).

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