Carbon fiber sizing device and carbon fiber wet winding production line

Abstract

The utility model relates to a carbon fiber sizing device and a carbon fiber wet-process winding production line, belongs to the technical field of carbon fiber wet-process winding, solves the problem of non-uniform glue content of two surfaces of a carbon fiber bundle, and comprises an impregnation roller, the lower part of the impregnation roller is positioned in an impregnation tank to form an impregnation part of the impregnation roller; the counter-pressing roller is matched with the non-immersion part of the impregnation roller and can rotate around the axis of the counter-pressing roller, the axis of the counter-pressing roller is parallel to the axis of the impregnation roller, a gap allowing a carbon fiber bundle to penetrate through is formed between the impregnation roller and the counter-pressing roller, and the length of the impregnation roller and the counter-pressing roller in the axis direction is larger than the width of the carbon fiber bundle. By adopting the glue applying device disclosed by the utility model, the glue contents of the two surfaces of the carbon fiber bundle are uniform and controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber wet winding, in particular to a carbon fiber sizing device and a carbon fiber wet winding production line. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] To increase the structural strength of cylindrical components, such as motor rotors, one existing method is to wind carbon fibers around the outer circumference of the cylindrical component. Carbon fiber winding methods include wet winding and dry winding. Wet winding uses unimpregnated carbon fiber bundles, which are then impregnated with resin inline before winding.

[0004] In carbon fiber wet winding, such as Figure 1 As shown, the gluing device usually uses a dipping roller 2 to apply liquid resin to the carbon fiber bundle 3. The gluing device includes a dipping roller 2 and a dipping tank 1. The dipping tank 1 is used to hold the liquid resin. The lower part of the dipping roller 2 is located in the dipping tank 1 as an immersion part, and the immersion part is immersed in the liquid resin in the dipping tank 1. The carbon fiber bundle 3 bypasses the dipping roller 2 but does not contact the liquid resin in the dipping tank 1. During the transportation of the carbon fiber bundle 3, the dipping roller 2 is driven to rotate under the friction force of the carbon fiber bundle 3 and brings up the liquid resin (referred to as glue) and attaches it to the surface of the carbon fiber bundle 3.

[0005] However, this sizing method makes the carbon fiber bundle 3 have more glue on one side and less glue on the other side. Figure 2 As shown, one solution is to allow the carbon fiber bundle 3 to be immersed in the dipping tank 1 while passing around the dipping roller 2. However, this method may cause the carbon fiber bundle 3 to contain too much glue, and the glue content is difficult to control. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a carbon fiber gluing device and a carbon fiber wet winding production line, so that the glue content on both sides of the carbon fiber bundle is uniform and the glue content is controllable.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] In the first aspect, an embodiment of the present invention provides a carbon fiber gluing device, comprising a dipping roller, the lower part of which is located in a dipping tank to form an immersed part of the dipping roller, and a pressing roller that cooperates with the non-immersed part of the dipping roller and can rotate around its own axis, the axis of the pressing roller is parallel to the axis of the dipping roller, and a gap is formed between the dipping roller and the pressing roller for allowing the carbon fiber bundle to pass through so that the dipping roller and the pressing roller are in contact with the carbon fiber bundle at the same time, and the length of the dipping roller and the pressing roller along the axial direction is greater than the width of the carbon fiber bundle.

[0009] Optionally, the counter-pressing roller is located directly above the dipping roller, so that the counter-pressing roller cooperates with the non-immersed portion of the dipping roller.

[0010] Optionally, along the conveying direction of the carbon fiber bundle, tensioning rollers that can rotate around their own axes are provided upstream and downstream of the pressing roller and the dipping roller, and the length of the tensioning roller along the axial direction is greater than the width of the carbon fiber bundle so that the carbon fiber bundle can always be in contact with the tensioning roller.

[0011] Optionally, the tensioning roller is symmetrically arranged relative to the plane where the axes of the dipping roller and the pressing roller are located.

[0012] Optionally, along the conveying direction of the carbon fiber bundle, a movable guide roller is provided upstream of the pressing roller and the dipping roller, the axis of the movable guide roller is parallel to the axis of the pressing roller and the dipping roller, and the movable guide roller is connected to a linear drive mechanism to realize linear reciprocating motion along its own axis, thereby guiding the carbon fiber bundle to reciprocate along the axis in the gap between the dipping roller and the pressing roller during the process of being conveyed.

[0013] Optionally, the length of the movable guide roller along the axial direction is greater than the width of the carbon fiber bundle.

[0014] Optionally, the movable guide roller is located at a set position so that the movable guide roller can tension the carbon fiber bundle.

[0015] Optionally, the movable guide roller is also provided downstream of the pressing roller and the dipping roller.

[0016] Optionally, the pressing roller and the dipping roller are both connected to a linear drive mechanism, so that the pressing roller and the dipping roller can synchronously reciprocate along their own axes relative to the dipping tank, so that in the process of the carbon fiber bundle passing through the gap between the dipping roller and the pressing roller and being transmitted, the contact area between the carbon fiber bundle and the pressing roller and the dipping roller continuously changes in the axial direction.

[0017] In a second aspect, an embodiment of the present invention provides a carbon fiber wet winding production line, which is equipped with the carbon fiber sizing device described in the first aspect.

[0018] The beneficial effects of the above utility model are as follows:

[0019] The glue of the dipping roller and the pressing roller are used to apply glue to the carbon fiber bundle, thereby ensuring that the glue content on both sides of the carbon fiber bundle is uniform.

[0020] 2. The carbon fiber sizing device of the present invention is provided with a movable guide roller, which is connected to a driving mechanism to realize reciprocating motion along its own axial direction. The reciprocating motion of the movable guide roller can drive the reciprocating motion of the carbon fiber bundle, so that the position of the carbon fiber bundle can change in conjunction with the change of the appearance position of the raw material roller, so that the transportation of the carbon fiber bundle is dynamically guided, and the carbon fiber bundle is not prone to wrinkles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation on this application.

[0022] Figure 1 This is a schematic diagram of the current carbon fiber gluing device structure;

[0023] Figure 2 This is a schematic diagram of current measures to solve the problem of uniform glue content on both sides of carbon fiber bundles;

[0024] Figure 3 This is a schematic structural diagram of Example 1 of the present utility model;

[0025] Figure 4 This is a schematic diagram of the reciprocating motion of the carbon fiber bundle driven by the movable guide roller in Example 1 of the utility model;

[0026] Among them, 1. Dipping tank, 2. Dipping roller, 3. Carbon fiber bundle, 4. Tensioning roller, 5. Pressing roller, 6. Movable guide roller. DETAILED DESCRIPTION

[0027] For the convenience of description, if the words "upper" and "lower" appear in this utility model, they only indicate that they are consistent with the upper and lower directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this utility model.

[0028] Example 1

[0029] This embodiment provides a carbon fiber gluing device, such as Figure 3 As shown, it includes a dipping tank 1 and a dipping roller 2. The dipping tank 1 is used to hold liquid resin. The lower part of the dipping roller 2 is located in the dipping tank 1 and serves as the immersion part of the dipping roller 2. The lower part of the dipping roller 2 is immersed in the liquid resin in the dipping tank 1. As the dipping roller 2 rotates, the liquid resin adheres to the surface of the dipping roller 2 and is picked up by the dipping roller 2.

[0030] The dipping tank 1 is a container with an open top, and its shape is a cube, a cylinder or other shapes. Those skilled in the art can configure it according to actual needs.

[0031] In order to enable the dipping roller 2 to rotate around its own axis, the two ends of the dipping roller 2 are rotatably connected to the tank wall of the dipping tank 1. In another embodiment, the two ends of the dipping roller 2 are rotatably connected to the dipping roller bracket, which is arranged outside the dipping tank 1.

[0032] Along the conveying direction of the carbon fiber bundle 3, tensioning rollers 4 are provided upstream and downstream of the dipping roller 2. The axis of the tensioning roller 4 is parallel to the axis of the dipping roller 2, which has a tensioning effect on the carbon fiber bundle 3, so that the carbon fiber bundle 3 can better fit with the dipping roller 2. The carbon fiber bundle 3 successively bypasses the upstream tensioning roller 4, the dipping roller 2 and the downstream tensioning roller 4.

[0033] In this embodiment, the upstream and downstream tensioning rollers 4 are symmetrically arranged relative to the vertical plane passing through the axis of the dipping roller 2, so that the tensioning forces applied by the upstream and downstream tensioning rollers 4 to the carbon fiber bundles 3 are also symmetrically arranged, ensuring the uniformity of the glue coating on the carbon fiber bundles 3.

[0034] The above structure can adopt the structure of the existing carbon fiber gluing device, and its further technical details are not described in detail here. This embodiment is improved on the basis of the existing carbon fiber gluing device, and adds a counter-pressure roller 5 that cooperates with the non-immersed part of the dipping roller 2. The axis of the counter-pressure roller 5 is parallel to the axis of the dipping roller 2.

[0035] In this embodiment, the pressing roller 5 is arranged directly above the dipping roller 2 to achieve cooperation between the pressing roller 5 and the non-immersed part of the dipping roller 2. The axes of the pressing roller 5 and the dipping roller 2 are located in the same vertical plane, and a gap is formed between the pressing roller 5 and the dipping roller 2 for the carbon fiber bundle 3 to pass through.

[0036] In order to enable the pressing roller 5 to rotate around its own axis, both ends of the pressing roller 5 are rotatably connected to the dipping tank 1. In another embodiment, both ends of the pressing roller 5 are rotatably connected to a pressing roller bracket, which is arranged outside the dipping tank 1.

[0037] It should be understood that the gap between the pressing roller 5 and the dipping roller 2 for the carbon fiber bundle to pass through is very small. This is because the thickness of a single layer of carbon fiber bundle is very small. This small gap even makes the pressing roller 5 and the dipping roller 2 almost in contact. Specifically, the dipping roller 2 contacts the lower surface of the carbon fiber bundle 3 and the pressing roller 5 contacts the upper surface of the carbon fiber bundle 3. The movement of the carbon fiber bundle 3 drives the dipping roller 2 and the pressing roller 5 to rotate, and at the same time, the liquid resin brought up by the dipping roller 2 can be transferred to the pressing roller 5. In the area where the pressing roller 5 and the dipping roller 2 are in contact with the carbon fiber bundle 3, the liquid resin on the surface of the dipping roller 2 can be transferred to the pressing roller 5 through the gaps in the carbon fiber bundle 3 itself (that is, the gaps between the individual fibers in the fiber bundle). In the remaining areas, the liquid resin on the dipping roller 2 can be directly transferred to the pressing roller 5.

[0038] After the liquid resin adheres to the surfaces of the dipping roller 2 and the pressing roller 5, the dipping roller 2 can coat the liquid resin on the lower surface of the carbon fiber bundle 3, and the pressing roller 5 can coat the liquid resin on the upper surface of the carbon fiber bundle 3, thereby ensuring that the glue content on the upper and lower surfaces of the carbon fiber bundle 3 is uniform.

[0039] Moreover, the pressing roller 5 cooperates with the non-immersed part of the dipping roller 2 so that the carbon fiber bundle 3 will not be immersed in the liquid resin in the dipping tank 1, avoiding the defects of excessive and uncontrollable glue content in the carbon fiber bundle 3.

[0040] In this embodiment, the lengths of the pressing roller 5 and the dipping roller 2 along the axial direction are both greater than the width of the carbon fiber bundle 3. Preferably, the lengths of the pressing roller 2 and the dipping roller 2 along the axial direction are the same, and the ends of the pressing roller 5 and the dipping roller 2 on the same side are arranged flush.

[0041] Correspondingly, the length of the tensioning roller 4 along the axial direction is also greater than the width of the carbon fiber bundle 3. Preferably, the length of the tensioning roller 4 is equal to the length of the dipping roller 2 and the pressing roller 5, and the ends of the tensioning roller 4 on the corresponding sides of the dipping roller 2 and the pressing roller 5 are arranged flush.

[0042] With this arrangement, there is a portion between the dipping roller 2 and the counter-pressing roller 5 that is not isolated by the carbon fiber bundle 3. The liquid resin of the dipping roller 2 can be better transferred to the counter-pressing roller 5, and space is left for the carbon fiber bundle 3 to move along the axis of the counter-pressing roller 5 and the dipping roller 2. The carbon fiber bundle 4 can make a linear motion along the axis of the dipping roller 2 and the counter-pressing roller 5, and the dipping roller 2 and the counter-pressing roller 5 can apply glue to the carbon fiber bundle 3 through different parts. During operation, the portion of the dipping roller 3 and the counter-pressing roller 5 that contacts the carbon fiber bundle applies glue to the carbon fiber bundle 3, and the remaining portion of the counter-pressing roller 5 directly receives the liquid resin transferred from the dipping roller 3. The carbon fiber bundle 3 contacts the portion of the dipping roller 2 and the counter-pressing roller 5 that is attached with the liquid resin, further ensuring the uniformity of the glue content on both sides of the carbon fiber bundle 3.

[0043] Further, such as Figure 4 As shown, in order to enable the carbon fiber bundle 3 to perform reciprocating linear motion along the axis of the dipping roller 2 and the pressing roller 5, the carbon fiber sizing device further includes a movable guide roller 6. The tensioning roller 4 is omitted in the figure. It should be understood that in other possible embodiments, the tensioning roller 4 may not be provided, and the movable guide roller 6 may be set at a set position to tension the carbon fiber bundle 3. That is, the movable guide roller 6 also serves as a tensioning roller.

[0044] Along the conveying direction of the carbon fiber bundle 3, the movable guide roller 6 is located upstream of the dipping roller 2 and the pressing roller 5. The movable guide roller 6 is rotatably connected to the moving part of the linear drive mechanism so that the movable guide roller 6 can perform reciprocating linear motion along the axial direction of the pressing roller 5 and the dipping roller 2 under the action of the linear drive mechanism.

[0045] Furthermore, the linear drive mechanism and the movable guide roller 6 are arranged outside the dipping tank 1, which is convenient for arranging the drive mechanism and the movable guide roller 6, and the dipping tank 1 will not be modified.

[0046] Preferably, the dimension of the movable guide roller 6 along the axial direction is larger than the width of the carbon fiber bundle 3 to avoid the carbon fiber bundle 3 from escaping from the movable guide roller 6 due to the speed difference when the movable guide roller 6 drives the carbon fiber bundle 3 to move.

[0047] The linear drive mechanism adopts a screw transmission mechanism or a hydraulic cylinder or a pneumatic cylinder or other device capable of outputting linear motion, the axis of which is arranged along the axis direction of the dipping roller 2 and the pressing roller 5.

[0048] When a hydraulic cylinder or an air cylinder is used, the movable guide roller 6 is rotationally connected to the piston rod of the hydraulic cylinder or the air cylinder; when a screw transmission mechanism is used, the movable guide roller 6 is rotationally connected to the motion shaft, and the motion shaft is fixedly connected to the screw slider of the screw transmission mechanism.

[0049] Furthermore, to facilitate control of the linear motion of the movable guide roller, the linear drive mechanism utilizes a screw transmission mechanism, including a forward- and reverse-rotating motor. The motor's output shaft is connected to one end of a screw, the other end of which is supported by a bearing seat. The screw's axis is parallel to the axes of the dipping roller 2 and the counter-pressing roller 5. A screw slider is threadedly connected to the screw, which is slidably connected to a fixed guide rail disposed parallel to the screw. The screw slider is fixed to one end of the motion shaft, and the movable guide roller 6 is rotationally connected to the other end of the motion shaft.

[0050] Preferably, the moving shaft passes through the support seat and is slidably connected to the support seat, and the support seat supports the moving shaft to prevent the moving shaft from causing significant deformation.

[0051] In this embodiment, the output movement of the movable guide roller 6 by the control screw transmission mechanism is made so that the position of the movable guide roller 6 corresponds to the appearance position of the carbon fiber bundle on the raw material roller at all times, thereby dynamically guiding the transportation of the carbon fiber bundle 3 and preventing the carbon fiber bundle 3 from wrinkling easily.

[0052] The working method of the carbon fiber gluing device of this embodiment is as follows:

[0053] The carbon fiber bundle 3 sequentially passes around the movable guide roller 6, the upstream tension roller 4, passes through the gap between the counter-pressing roller 5 and the dipping roller 2, and then passes around the downstream tension roller 4. The carbon fiber bundle 3 is transported along the conveying direction. Under the action of friction, it drives the dipping roller 2, the counter-pressing roller 5, the tension roller 4 and the movable guide roller 6 to rotate around their own axes.

[0054] The lower portion of the dipping roller 2 is immersed in the liquid resin in the dipping tank 1. As the dipping roller 2 rotates, the liquid resin adheres to the surface of the dipping roller 2 and is carried out. The dipping roller 2 contacts the lower surface of the carbon fiber bundle 3, thereby coating the lower surface of the carbon fiber bundle 3 with liquid resin. At the same time, the liquid resin adhered to the surface of the dipping roller 2 can be transferred to the pressing roller 5, which contacts the upper surface of the carbon fiber bundle 3, thereby coating the upper surface of the carbon fiber bundle 3 with liquid resin. The drive mechanism drives the carbon fiber bundle 3 to reciprocate along the axis of the dipping roller 2 and the pressing roller 5 through the movable guide roller 6, so that different parts of the dipping roller 2 and the pressing roller 5 apply glue to the carbon fiber bundle 3, ensuring a uniform glue content on both sides of the carbon fiber bundle 3.

[0055] Example 2

[0056] This embodiment provides a carbon fiber gluing device. Compared with Example 1, the only difference is that a movable guide roller 6 is also provided downstream of the pressing roller 5 and the dipping roller 2. The movable guide roller 6 is connected to the linear drive mechanism. The setting method of the linear drive mechanism is the same as that of Example 1 and will not be repeated here.

[0057] It is understandable that, in this embodiment, the tensioning roller 4 may not be provided, and the two movable guide rollers 6 are located at set positions so that the two movable guide rollers 6 have a tensioning effect on the carbon fiber bundle.

[0058] Example 3

[0059] This embodiment provides a carbon fiber gluing device. Compared with Example 1, the only difference is that no movable guide roller 6 is provided, and tensioning rollers 4 are provided upstream and downstream of the pressing roller 5 and the dipping roller 2. The pressing roller 5 and the dipping roller 2 are both connected to a linear drive mechanism, and the linear drive mechanism drives the pressing roller 5 and the dipping roller 2 to perform reciprocating linear motion perpendicular to the transmission direction of the carbon fiber bundle 3, so that in the process of the carbon fiber bundle 3 passing through the gap between the dipping roller 2 and the pressing roller 5 and being transmitted, the contact area between the carbon fiber bundle 3 and the pressing roller 5 and the dipping roller 2 continuously changes in the axial direction.

[0060] The structure of the linear drive mechanism is the same as that of the linear drive mechanism in Example 1, and will not be described again here.

[0061] When adopting this solution, it should be understood that the size and position settings of the dipping tank 1 and the dipping roller 2 will not interfere with each other, that is, the dipping tank 1 does not affect the connection between the linear drive mechanism and the dipping roller.

[0062] Example 4

[0063] This embodiment provides a carbon fiber wet winding production line, which is equipped with the carbon fiber gluing device described in Example 1, Example 2, or Example 3. The remaining structure of the production line can adopt existing technology and will not be described in detail here.

[0064] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A carbon fiber gluing device, comprising a dipping roller, wherein the lower portion of the dipping roller is located in a dipping tank to form an immersion portion of the dipping roller, characterized in that: It also includes a counter-pressing roller that cooperates with the non-immersed part of the dipping roller and can rotate around its own axis. The axis of the counter-pressing roller is parallel to the axis of the dipping roller. A gap is formed between the dipping roller and the counter-pressing roller for the carbon fiber bundle to pass through so that the dipping roller and the counter-pressing roller are in contact with the carbon fiber bundle at the same time. The length of the dipping roller and the counter-pressing roller along the axial direction is greater than the width of the carbon fiber bundle.

2. The carbon fiber gluing device according to claim 1, characterized in that: The counter-pressing roller is located just above the dipping roller.

3. The carbon fiber gluing device according to claim 1, characterized in that: Along the conveying direction of the carbon fiber bundle, tensioning rollers capable of rotating around their own axes are provided upstream and downstream of the pressing roller and the dipping roller. The length of the tensioning roller along the axis direction is greater than the width of the carbon fiber bundle.

4. The carbon fiber gluing device according to claim 3, characterized in that: The tensioning roller is symmetrically arranged relative to the plane where the axes of the dipping roller and the counter-pressing roller are located.

5. The carbon fiber gluing device according to claim 1, characterized in that: Along the conveying direction of the carbon fiber bundle, a movable guide roller is provided upstream of the pressing roller and the dipping roller, the axis of the movable guide roller is parallel to the axis of the pressing roller and the dipping roller, and the movable guide roller is connected to the linear drive mechanism to realize linear reciprocating motion along its own axis, thereby guiding the carbon fiber bundle to reciprocate along the axis in the gap between the dipping roller and the pressing roller during the process of passing through the gap between the dipping roller and the pressing roller.

6. The carbon fiber gluing device according to claim 5, characterized in that: The length of the movable guide roller along the axial direction is greater than the width of the carbon fiber bundle.

7. The carbon fiber gluing device according to claim 5, characterized in that: The movable guide roller is located at a set position so that the movable guide roller can tension the carbon fiber bundle.

8. The carbon fiber gluing device according to claim 5, characterized in that: The movable guide roller is also provided downstream of the pressing roller and the dipping roller.

9. The carbon fiber gluing device according to claim 1, characterized in that: The pressing roller and the dipping roller are both connected to a linear drive mechanism, so that the pressing roller and the dipping roller can synchronously reciprocate along their own axes relative to the dipping tank, so that during the process of the carbon fiber bundle passing through the gap between the dipping roller and the pressing roller and being transmitted, the contact area between the carbon fiber bundle and the pressing roller and the dipping roller continuously changes in the axial direction.

10. Carbon fiber wet winding production line, characterized in that, A carbon fiber gluing device according to any one of claims 1 to 9 is provided.

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