Fiber roller pipe body and preparation method thereof

Abstract

The invention belongs to the technical field of fiber composite materials, and discloses a fiber roller pipe body and a preparation method thereof.The fiber roller pipe body comprises at least two fiber winding layers and at least one fiber bundle layer which are arranged in the circumferential direction of the fiber roller pipe body in a surrounding mode; each fiber winding layer is of a continuous winding structure, each fiber bundle layer is clamped between every two adjacent fiber winding layers to form a sandwich structure, and each fiber winding layer and each fiber bundle layer are connected in a bonding mode; each fiber bundle layer comprises a plurality of pultrusion strip-shaped structures, the multiple strip-shaped structures are arranged in the axial extending direction of the fiber roller pipe body and are sequentially arranged side by side in the circumferential direction of the fiber roller pipe body, and the adjacent strip-shaped structures are connected in a bonding mode. The axial strength and design freedom degree of the fiber roller pipe body can be improved, and the whole preparation method is simple in process, high in finished product percent of pass and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber composite materials, and in particular to a fiber roller tube and a preparation method thereof. Background Art

[0002] Fiber rollers are made of fiber composite materials. Their lightweight, high-strength, and high-rigidity advantages make them widely used in textile, papermaking, printing, and plastics machinery, gradually replacing traditional steel and aluminum rollers. Compared to metal rollers, fiber rollers, with their lighter weight and lower moment of inertia, significantly improve the machine's start-up and stop response speed, while also achieving higher speeds and lower energy consumption, effectively improving overall machine efficiency and energy conservation. The unique properties of fiber rollers are particularly well-utilized in wide-width, high-speed machinery, promoting technological advancement and industrial upgrading in related industries.

[0003] In wide-format equipment, fiber rollers are typically long, and their center is prone to sagging or deformation due to the combined effects of their own weight and material tension. This not only leads to uneven tension distribution in the web, resulting in pressure differences between the ends and center of the roller, which affects the thickness consistency of the product, but can also cause resonance or vibration during high-speed operation, seriously affecting equipment stability and product quality. However, improving the roller's axial strength requires high overall manufacturing costs, a complex process, and high resin molding requirements, resulting in a relatively high scrap rate.

[0004] Therefore, there is an urgent need for a fiber roller tube and a preparation method thereof to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a fiber roller tube body and a preparation method thereof, which can effectively solve the problem that the middle part of the roller shaft is prone to sagging or deformation under the dual effects of its own weight and material tension, improve the axial strength and design freedom of the fiber roller tube body, and the overall preparation method is simple in process, has a high qualified rate of finished products, and is low in cost.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The fiber roller tube comprises:

[0008] At least two fiber winding layers and at least one fiber bundle layer, both of which are arranged around the circumference of the fiber roller tube; each fiber winding layer is a continuously wound structure, each fiber bundle layer is sandwiched between two adjacent fiber winding layers to form a sandwich structure, and each fiber winding layer and each fiber bundle layer are bonded together;

[0009] Each fiber bundle layer includes a plurality of pultruded belt-like structures, which are arranged along the axial extension direction of the fiber roller tube body and are sequentially arranged side by side along the circumferential direction of the fiber roller tube body, and adjacent belt-like structures are bonded together.

[0010] Furthermore, the fiber winding layers and the fiber bundle layers can be stacked in multiple layers in a manner that the fiber winding layers and the fiber bundle layers are alternately arranged.

[0011] Furthermore, the projection of each of the belt-like structures along the axial direction of the fiber roller tube body is a rectangular structure.

[0012] Furthermore, a plurality of the belt-like structures are arranged side by side without gap in the circumferential direction of the fiber roller tube body.

[0013] Furthermore, the band-like structure includes a strip-like structure or a sheet-like structure.

[0014] Furthermore, the strip structure or the sheet structure is made of carbon fiber, glass fiber or basalt fiber.

[0015] Furthermore, the fiber winding layer includes continuous fiber filaments, and the fiber filaments can be laid along the circumferential direction of the fiber roller tube body in a hoop winding, spiral winding or hoop-spiral parallel winding manner.

[0016] Furthermore, adjacent strip structures can be connected by resin bonding.

[0017] Furthermore, adjacent fiber winding layers and fiber bundle layers can be connected by resin bonding.

[0018] A method for preparing a fiber roller tube body, using any of the fiber roller tube bodies described above, comprises the following steps:

[0019] S1: On a mold, winding the first fiber winding layer onto the mold according to a fiber winding process to form the first fiber winding layer;

[0020] S2: outside the first fiber winding layer, arranging a plurality of pultruded belt-like structures along the axial extension direction of the fiber roller tube body and sequentially arranging them side by side along the circumferential direction of the fiber roller tube body, and bonding adjacent belt-like structures to form a second fiber bundle layer, and bonding the first fiber winding layer and the second fiber bundle layer to each other;

[0021] S3: outside the second fiber bundle layer, winding the third fiber winding layer outside the second fiber bundle layer according to the fiber winding process to form the third fiber winding layer to form a sandwich structure; the second fiber bundle layer and the third fiber winding layer are bonded together;

[0022] S4: Repeat steps S2 and S3 according to the setting requirements, alternately laying the fiber bundle layer and the fiber winding layer to form a multi-layer stacking structure;

[0023] S5: After the laying is completed, the entire structure is heated and solidified, cooled and demoulded, and cut according to the required size to obtain the fiber roller tube body.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a fiber roller tube and its preparation method. By sandwiching axially extending pultruded ribbon fiber bundles between wound fiber layers to form a sandwich composite structure, the fiber roller tube's axial tensile strength and stiffness are significantly improved. The pultruded ribbon structure reduces ineffective resin content, resulting in a higher fiber volume ratio, significantly improving the ribbon's tensile strength, stiffness, and fatigue performance. This effectively suppresses sagging, resonance, and uneven tension, ensuring the roller's operational stability under high-speed, high-load conditions. The fiber winding angle and ribbon fiber arrangement can be flexibly adjusted, giving the roller tube greater design freedom and enabling the ratio of axial to circumferential performance to be customized according to actual needs. Furthermore, the fiber roller tube's preparation process is simple, with a high product qualification rate and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a cross-sectional view of a sandwich composite structure of the fiber roller tube body of the present invention;

[0027] Figure 2 It is a cross-sectional view of the multi-layered sandwich composite structure of the fiber roller tube body of the present invention.

[0028] In the picture:

[0029] 1. Fiber winding layer; 2. Fiber bundle layer; 21. Ribbon structure. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0031] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0034] Please refer to Figures 1 to 2 As shown, the present invention provides a fiber roller tube body, comprising at least two fiber winding layers 1 and at least one fiber bundle layer 2, both of which are arranged around the circumferential direction of the fiber roller tube body; each fiber winding layer 1 is a continuous winding structure, and each fiber bundle layer 2 is sandwiched between two adjacent fiber winding layers 1 to form a sandwich structure, and each fiber winding layer 1 and each fiber bundle layer 2 are bonded together; each fiber bundle layer 2 includes a plurality of pultruded belt structures 21, and the plurality of belt structures 21 are arranged along the axial extension direction of the fiber roller tube body, and are arranged side by side in sequence along the circumferential direction of the fiber roller tube body, and adjacent belt structures 21 are bonded together.

[0035] A sandwich composite structure is formed by sandwiching a fiber bundle layer 2 of an axially extending pultruded belt structure 21 between adjacent fiber winding layers 1, and a plurality of pultruded belt structures 21 are arranged side by side along the circumferential direction of the fiber roller tube body, thereby effectively enhancing the tensile strength and stiffness of the fiber roller tube body along the axial direction (i.e., the length direction), and significantly improving the axial mechanical properties. The pultruded belt structure 21 can reduce the invalid resin content, so that it has a higher fiber volume ratio, thereby significantly improving the tensile strength, stiffness and fatigue performance of the belt structure 21, effectively suppressing the sagging, resonance and uneven tension distribution in the middle of the roller, ensuring the uniformity of tension of the wide-width coil during operation, and improving the stability and reliability of the roller under high load and high-speed operation conditions. Furthermore, the adjustable winding angle of the fiber winding layer 1 and the adjustable width, number, and arrangement density of the ribbon fibers in the fiber bundle layer 2 allow for flexible design of the ratio of axial to circumferential performance in the fiber roller tube. This allows for customized layup solutions based on varying equipment requirements, such as width, rotational speed, and tension, further enhancing design freedom. Furthermore, the adhesive connection between each fiber winding layer 1 and each fiber bundle layer 2, as well as the adhesive connection between adjacent ribbon structures 21, simplifies the overall manufacturing process, reduces bonding precision requirements, and improves the yield rate of finished products.

[0036] Specifically, adjacent ribbon structures 21 are bonded together using resin, effectively eliminating interfacial weaknesses between them. This allows for more uniform stress distribution across the fiber bundle layer 2, preventing localized delamination or crack propagation. The bonded ribbon structures 21 can better coordinate deformation and share stress when subjected to axial tensile or bending loads, significantly improving the axial strength, hoop strength, and overall stiffness of the fiber roller tube.

[0037] At the same time, adjacent fiber winding layers 1 and fiber bundle layers 2 can be connected by resin bonding, so that a stable and integrated overall structure can be formed between the adjacent fiber winding layers 1 and fiber bundle layers 2, effectively preventing interlayer slippage or separation, and improving the overall stiffness and strength of the fiber roller tube body when subjected to tension, compression and bending.

[0038] like Figure 1 As shown, for example, the first fiber winding layer 1 can be wound on the mold according to the fiber winding process; then a plurality of pultruded belt structures 21 are arranged outside the first fiber winding layer 1 along the axial extension direction of the fiber roller tube body, and are arranged side by side in sequence along the circumferential direction of the fiber roller tube body, and adjacent belt structures 21 are bonded together, and the first fiber winding layer 1 and the second fiber bundle layer 2 are bonded together; thereafter, the third fiber winding layer 1 is wound outside the second fiber bundle layer 2 according to the fiber winding process to form a sandwich structure of the third fiber winding layer 1, and the second fiber bundle layer 2 and the third fiber winding layer 1 are bonded together.

[0039] like Figure 2 As shown, according to different design requirements, in some embodiments, the fiber winding layer 1 and the fiber bundle layer 2 can be arranged in multiple layers in an alternating manner; wherein the fiber winding layer 1 mainly enhances the circumferential performance, and the fiber bundle layer 2 mainly enhances the axial performance, and the alternating stacking makes the roller tube body have good mechanical properties in both axial and circumferential directions, and the overall structure is more balanced and stronger; and the alternating structure can effectively disperse the complex stresses such as stretching, bending, and torsion generated during use, reduce local stress concentration, and reduce the risk of fatigue damage and destruction; it can also make the fiber roller tube body more resistant to deformation and fatigue under long-term high-load and high-frequency operation, thereby extending its service life.

[0040] Specifically, the projection of each strip-like structure 21 along the axial direction of the fiber roller tube body is a rectangular structure; wherein, the axial projection of the strip-like structure 21 is a rectangle with consistent width and uniform thickness, making laying simpler and arrangement tighter; and after laying, a continuous and uniform reinforcement area can be formed in the axial direction, effectively improving the overall tensile strength and stiffness, and avoiding local stress concentration.

[0041] More specifically, a plurality of belt-like structures 21 are arranged side by side without gaps in the circumferential direction of the fiber roller tube body; wherein, the belt-like structures 21 are arranged without gaps to form a continuous reinforcement ring body in the axial direction, effectively avoiding local weak links.

[0042] Optionally, the band structure 21 includes a strip structure or a sheet structure, which can be flexibly selected according to different performance requirements and process conditions to optimize axial mechanical properties and manufacturing efficiency and enhance the freedom of design and application.

[0043] Optionally, the strip structure or sheet structure may be made of, but not limited to, carbon fiber, glass fiber or basalt fiber, which is not specifically limited here.

[0044] The fiber winding layer 1 includes continuous fiber filaments, which can be laid along the circumferential direction of the fiber roller tube in a circumferential winding, spiral winding, or circumferential spiral parallel winding manner. The continuous fiber filaments can be wound after being fully impregnated with resin, which can ensure good interface bonding between the fiber and the resin, forming a dense and uniform composite material structure, thereby significantly improving the overall strength, stiffness, and fatigue resistance of the roller tube. Different winding methods give the fiber roller tube different mechanical properties. Circumferential winding can effectively enhance the circumferential strength of the roller tube and improve its ability to resist radial pressure; spiral winding can further enhance the axial tensile strength while enhancing the circumferential performance, thereby optimizing the multi-directional force performance; circumferential spiral parallel winding takes into account both circumferential and axial performance, and on the basis of maintaining excellent circumferential strength, further improves the overall axial mechanical properties, giving the fiber roller tube body better comprehensive mechanical performance.

[0045] The resin may be, but is not limited to, epoxy resin, polyester resin or vinyl ester resin, etc., and is not specifically limited here.

[0046] Optionally, the winding angle of the fiber winding layer 1 can be 0°, 45°, etc., which is not specifically limited here.

[0047] The present invention also provides a method for preparing a fiber roller tube body, using the fiber roller tube body in any of the above embodiments, comprising the following steps:

[0048] S1: On a mold, winding a first fiber winding layer 1 onto the mold according to a fiber winding process to form a first fiber winding layer 1;

[0049] S2: Outside the first fiber winding layer 1, a plurality of pultruded belt structures 21 are arranged along the axial extension direction of the fiber roller tube body and sequentially arranged side by side along the circumferential direction of the fiber roller tube body. Adjacent belt structures 21 are bonded together to form a second fiber bundle layer 2. The first fiber winding layer 1 and the second fiber bundle layer 2 are bonded together.

[0050] S3: Winding the third fiber winding layer 1 outside the second fiber bundle layer 2 according to the fiber winding process to form the third fiber winding layer 1 to form a sandwich structure; the second fiber bundle layer 2 and the third fiber winding layer 1 are bonded together;

[0051] S4: Repeat steps S2 and S3 according to the setting requirements, alternately laying the fiber bundle layer 2 and the fiber winding layer 1 to form a multi-layer stacking structure;

[0052] S5: After the laying is completed, the entire structure is heated and solidified, cooled and demoulded, and cut according to the required size to obtain the fiber roller tube body.

[0053] The fiber roller tube preparation method forms a sandwich composite structure by sandwiching a fiber bundle layer 2 of a pultruded belt structure 21 extending in the axial direction between adjacent fiber winding layers 1, and a plurality of pultruded belt structures 21 are arranged side by side along the circumferential direction of the fiber roller tube, thereby effectively enhancing the tensile strength and stiffness of the fiber roller tube along the axial direction (i.e., the length direction), and significantly improving the axial mechanical properties. The pultruded belt structure 21 can reduce the invalid resin content, so that it has a higher fiber volume ratio, thereby significantly improving the tensile strength, stiffness and fatigue performance of the belt structure 21, effectively suppressing the sagging, resonance and uneven tension distribution in the middle of the roller shaft, ensuring the uniformity of tension of the wide-width roll during operation, and improving the stability and reliability of the roller shaft under high load and high-speed operation conditions. Furthermore, the adjustable winding angle of the fiber winding layer 1 and the adjustable width, number, and arrangement density of the ribbon fibers in the fiber bundle layer 2 allow for flexible design of the ratio of axial to circumferential performance in the fiber roller tube. This allows for customized layup solutions based on varying equipment requirements, such as width, rotational speed, and tension, further enhancing design freedom. Furthermore, the adhesive connection between each fiber winding layer 1 and each fiber bundle layer 2, as well as the adhesive connection between adjacent ribbon structures 21, simplifies the overall manufacturing process, reduces bonding precision requirements, and improves the yield rate of finished products.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Fiber roller tube, characterized in that: include: At least two fiber winding layers (1) and at least one fiber bundle layer (2), both of which are arranged around the circumference of the fiber roller tube body; each layer of the fiber winding layer (1) is a continuous winding structure, each layer of the fiber bundle layer (2) is sandwiched between two adjacent layers of the fiber winding layer (1) to form a sandwich structure, and each layer of the fiber winding layer (1) and each layer of the fiber bundle layer (2) are bonded and connected; Each fiber bundle layer (2) includes a plurality of pultruded belt-like structures (21), wherein the plurality of belt-like structures (21) are arranged along the axial extension direction of the fiber roller tube body and are sequentially arranged side by side along the circumferential direction of the fiber roller tube body, and adjacent belt-like structures (21) are bonded and connected.

2. The fiber roller tube according to claim 1, characterized in that: The fiber winding layer (1) and the fiber bundle layer (2) can be arranged in a multi-layer stacked manner in a manner such that the fiber winding layer (1) and the fiber bundle layer (2) are alternately arranged.

3. The fiber roller tube according to claim 1, characterized in that: The projection of each of the belt-like structures (21) along the axial direction of the fiber roller tube body is a rectangular structure.

4. The fiber roller tube according to claim 3, characterized in that: The plurality of belt-like structures (21) are arranged side by side without gap in the circumferential direction of the fiber roller tube.

5. The fiber roller tube according to claim 4, characterized in that: The band-like structure (21) includes a strip-like structure or a sheet-like structure.

6. The fiber roller tube according to claim 5, characterized in that: The strip structure or the sheet structure is made of carbon fiber, glass fiber or basalt fiber.

7. The fiber roller tube according to claim 1, characterized in that: The fiber winding layer (1) comprises continuous fiber filaments, and the fiber filaments can be laid along the circumferential direction of the fiber roller tube body in a hoop winding, spiral winding or hoop spiral parallel winding manner.

8. The fiber roller tube according to any one of claims 1 to 7, characterized in that: Adjacent strip structures (21) can be connected by resin bonding.

9. The fiber roller tube according to any one of claims 1 to 7, characterized in that: Adjacent fiber winding layers (1) and fiber bundle layers (2) can be connected by resin bonding.

10. A method for preparing a fiber roller tube, characterized in that: The fiber roller tube according to any one of claims 1 to 9 is used, comprising the following steps: S1: On a mold, winding the first fiber winding layer (1) onto the mold according to a fiber winding process to form the first fiber winding layer (1); S2: outside the first fiber winding layer (1), a plurality of pultruded belt-shaped structures (21) are arranged along the axial extension direction of the fiber roller tube body, and are sequentially arranged side by side along the circumferential direction of the fiber roller tube body, and adjacent belt-shaped structures (21) are bonded and connected to form the second fiber bundle layer (2), and the first fiber winding layer (1) and the second fiber bundle layer (2) are bonded and connected; S3: outside the second fiber bundle layer (2), the third fiber winding layer (1) is wound outside the second fiber bundle layer (2) according to the fiber winding process to form the third fiber winding layer (1) to form a sandwich structure; the second fiber bundle layer (2) and the third fiber winding layer (1) are bonded together; S4: repeating steps S2 and S3 according to the setting requirements, alternately laying the fiber bundle layer (2) and the fiber winding layer (1) to form a multi-layer superimposed structure; S5: After the laying is completed, the entire structure is heated and solidified, cooled and demoulded, and cut according to the required size to obtain the fiber roller tube body.

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