G-CFRP winding pipe core for winding copper foil and aluminum foil
By introducing a carbon fiber layer into the GFRP wound core, the problem of insufficient lateral stiffness of the GFRP wound core is solved, achieving higher bending stiffness and material durability, which is suitable for stability and reusability in the copper and aluminum foil winding process.
Patent Information
- Application Number
- CN202423190051.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-24
AI Technical Summary
The existing GFRP wound core has insufficient lateral stiffness, which makes the copper and aluminum foil windings prone to deformation, slippage and surface damage during transportation, and the fatigue performance decreases when reused.
G-CFRP wound cores, made from a mixture of glass fiber and carbon fiber, enhance their bending stiffness by adding a carbon fiber layer inside the core. The preparation methods include glass fiber cross-spiral winding, carbon fiber arc sheet bonding, and outer layer winding.
It significantly improves the bending stiffness of the core, reduces deformation and material damage during transportation, and enhances the durability and surface integrity for repeated use.
Smart Images
Figure CN223524657U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of copper foil aluminum foil winding with pipe core, especially a kind of hybrid fiber composite winding pipe core. BACKGROUND
[0002] At present, copper foil, aluminum foil winding with pipe core is mostly GFRP (glass fiber reinforced composite) winding pipe. GFRP winding pipe is made of glass fiber reinforced composite material impregnated woven winding pultrusion curing. The pipe body is formed by glass fiber reinforced composite material interlaced spiral winding, which is light in weight, high in longitudinal strength, corrosion resistant and long in service life. However, the lateral rigidity is relatively poor. Copper foil aluminum foil winding with pipe core often uses this glass fiber reinforced composite winding pipe.
[0003] With the increase of product volume and weight, the GFRP winding pipe is supported at both ends during transportation, and the middle is stressed and shaken. Wrinkles and arrows may appear at the bottom of the roll at the customer end, causing some materials to be scrapped. The basic reason is that the lateral rigidity of the pipe core is not enough, and the bending deformation causes the copper foil to slip and extrude. On the other hand, GFRP winding pipe can be used repeatedly for a certain number of times, and the probability of problems occurring after pipe core fatigue may increase. In addition, improper operation and storage during use may cause surface scratches, and the surface may be turned and polished for a certain number of times for reuse, and the pipe wall becomes thinner, and the corresponding bending resistance decreases. CONTENT OF THE UTILITY MODEL
[0004] The technical problem to be solved by the present application is to overcome the defects of the prior art, and to provide a G-CFRP winding pipe core for copper foil and aluminum foil winding. The composite material G-CFRP pipe core is prepared by mixing glass fiber and carbon fiber, which solves the problem of insufficient bending stiffness of the current GFRP pipe core.
[0005] The technical solution adopted by the present application to achieve the purpose of the invention is a G-CFRP winding pipe core for copper foil and aluminum foil winding. The pipe core is formed by interlaced spiral winding and impregnation of glass fiber reinforced composite material. Its characteristics are that the pipe core contains a carbon fiber layer.
[0006] In order to further enhance the bending stiffness of the pipe core, the carbon fiber layer can be one or more layers.
[0007] The carbon fiber layer is formed by two or more carbon fiber arc pieces that are matched with the curvature of the pipe core and buckled into a layer of the pipe core.
[0008] The preparation method of the pipe core of the present application is as follows: first, impregnate the glass fiber reinforced composite material, then interlaced spiral winding and curing to form the inner layer of the pipe core, then brush the glue on the surface of the carbon fiber arc piece and adhere to the surface of the inner layer of the pipe core and cure, and finally impregnate, interlaced winding and curing the outer layer of the pipe core to form the G-CFRP winding pipe core.
[0009] This invention uses hybrid fibers to prepare G-CFRP cores, which greatly improves the bending stiffness compared to ordinary G-CFRP cores. When used for copper and aluminum foil winding cores, the cores exhibit less lateral bending deformation during handling, and the copper and aluminum foils are less likely to be damaged. Attached Figure Description
[0010] Figure 1 This is a partial longitudinal cross-sectional view of the core of the G-CFRP winding tube for copper and aluminum foil winding of this utility model. Detailed Implementation
[0011] The following kimono illustrations and embodiments will provide a more detailed description of this utility model. Example
[0012] like Figure 1 As shown, the copper and aluminum foil winding tube core 2 is made of G-CFRP. The inner layer 2-1 of the core is formed by interlacing and spirally winding glass fiber reinforced composite material and then impregnating and curing it. The outer layer 2-3 is the same as the inner layer 2-1. The middle layer 2-2 is a carbon fiber layer. In the embodiment, the thickness of the carbon fiber layer is 1mm, 2mm, and 3mm, respectively. The carbon fiber layer is formed by bonding multiple carbon fiber arc sheets with the same curvature as the outer surface of the inner layer 2-1 around the circumference. Preparation method: First, glass fiber reinforced composite material is impregnated with resin, interlaced and spirally wound, and cured to form the inner layer 2-1 of the core. Then, carbon fiber arc sheets are brushed with resin and bonded to the surface of the inner layer of the core and cured to form the carbon fiber layer 2-2. Finally, the outer layer 2-3 of the core is impregnated with resin, interlaced and spirally wound, and cured to form the G-CFRP wound tube core. The inner diameter of the core is 150mm, the total wall thickness is 15mm, and the carbon fiber layer is located in the middle position.
[0013] Comparison of flexural stiffness performance between G-CFRP pipes with different thicknesses of carbon fiber layers in the middle layer and GFRP pipes (inner diameter 150mm, wall thickness 15mm)
[0014] Parameters Pure glass fiber 1 mm carbon fiber layer 2 mm carbon fiber layer 3 mm carbon fiber layer Bending stiffness N / mm 11869 16706 19478 21055 Improvement ratio % - 40.80 64.11 77.40
[0015] As can be seen from the table, the addition of carbon fiber layers of different thicknesses can increase the bending stiffness by more than 40%.
[0016] To further enhance the bending stiffness of the core, the carbon fiber layer can be one or more layers.
Claims
1. A G-CFRP winding tube core for winding copper foil and aluminum foil, the tube core being formed by mutually crossing spiral winding of a glass fiber reinforced composite material and impregnation and curing; characterized in that: The carbon fiber layer is one or more layers; the carbon fiber layer is formed by buckling two or more carbon fiber arc pieces which are adapted to the curvature of the tube core.