Continuous rolling carbon fiber cloth, preparation process and finished product detection method

Abstract

The invention discloses a continuously wound carbon fiber cloth, a preparation process and a finished product detection method, and relates to the technical field of carbon fiber cloth preparation, the winding initial section and the winding termination section of the carbon fiber cloth are respectively connected with a first electric connection detection member and a second electric connection detection member, and the carbon fiber cloth can be continuously wound through the conductivity and continuity of the carbon fiber cloth. A first electric connection detection head on a first electric connection detection piece connected to the carbon fiber cloth at the winding initial section can be electrically connected with a second electric connection detection head on a second electric connection detection piece connected to the winding termination section; when a product is detected, current and / or current can be applied to the first electric connection detection head and the second electric connection detection head to detect whether the carbon fiber cloth is continuous and has no open circuit or not under the condition that the continuously wound carbon fiber cloth does not need to be unfolded, so that whether the whole length of a carbon fiber cloth roll material has the condition of disconnection and rewinding or not can be quickly determined.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon fiber cloth preparation, and in particular to a continuously rolled carbon fiber cloth, a preparation process and a finished product detection method. Background Art

[0002] In the preparation process of making a carbon fiber cloth that is continuously wound from multiple carbon fiber tows, it is necessary to first use a creel to unwind the carbon fiber tows from multiple carbon fiber tubes, and then use a yarn unwinding machine to evenly unwind the multiple carbon fiber tows, so that the carbon fiber tows are transformed into thin yarn sheets with uniformly dispersed width through a series of processes, and then pressed by a pressing machine so that the multiple carbon fiber tows after unwinding are pressed into a whole piece of carbon fiber cloth, and finally the continuously prepared carbon fiber cloth is wound by a winding machine.

[0003] When the carbon fiber cloth rolls are delivered to enterprises, some enterprises will inspect or conduct random inspections on the delivered carbon fiber cloth rolls. However, since the carbon fiber cloth rolls are usually wound in a long length, it is impossible or difficult to fully unfold the carbon fiber cloth rolls for inspection at the inspection site. The random inspection process can only measure the weight and winding thickness of the carbon fiber cloth rolls, and unfold a small part of the carbon fiber cloth rolls to detect whether there are broken cloth splicing. It is impossible to detect whether the entire carbon fiber cloth roll is broken and rewound over the entire length.

[0004] This also leads to some manufacturers winding waste carbon fiber cloth or poor carbon fiber cloth on the innermost layer of the reel, and then winding carbon fiber cloth of slightly better quality or that meets the requirements on the outer layer of the above waste carbon fiber cloth or poor carbon fiber cloth to cover the above waste carbon fiber cloth or poor carbon fiber cloth so as to reach the same standard weight and the same standard winding thickness. Even during random inspection, a small part of the unfolded carbon fiber cloth roll is still wound with carbon fiber cloth of slightly better quality or that meets the requirements, and the inspectors cannot find out whether the carbon fiber cloth roll is broken or rewound along its entire length. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a preparation process of a continuously wound carbon fiber cloth, the preparation process comprising the following steps: pressing a yarn sheet obtained by unwinding a plurality of bundles of carbon fiber tows that are continuously unwound and fed to obtain a continuously prepared carbon fiber cloth, and making at least one side of the continuously prepared carbon fiber cloth continuously covered with an insulating release layer; then using a reel to wind the continuously prepared carbon fiber cloth, so that the continuously prepared carbon fiber cloth forms a continuous roll on the reel; wherein the continuous roll has an initial winding section located in the inner layer of the continuous roll and a winding termination section located in the outer layer of the connecting roll; before winding, the carbon fiber cloth in the initial winding section is connected to a first electrical connection detection component, and the first electrical connection detection component has a first electrical connection detection head that penetrates the stacking range of the continuous roll along the axial direction of the reel; after winding, the carbon fiber cloth in the winding termination section is connected to a second electrical connection detection component, and the second electrical connection detection component has a second electrical connection detection head.

[0007] As a further solution of the present invention: the first electrical connection detection part includes a sheet-like connecting outer skin, a detection area and a connection area outside the detection area are provided on one side surface of the sheet-like connecting outer skin, a conductive sheet substrate is bonded to the detection area, and a bonding layer is bonded to the connection area; the first electrical connection detection head of the first electrical connection detection part is connected to the conductive sheet substrate; the sheet-like connecting outer skin is bonded to the initial section of winding through the bonding layer, and the conductive sheet substrate is in layered conductive contact with the carbon fiber cloth of the initial section of winding.

[0008] As a further solution of the present invention: the first electrical connection detection component includes two sheet-like connecting outer skins arranged along the thickness direction; each sheet-like connecting outer skin is provided with a corresponding conductive sheet substrate and an adhesive layer, and the conductive sheet substrate and the adhesive layer are both located on a side surface of the sheet-like connecting outer skin opposite to the other sheet-like connecting outer skin; wherein the conductive sheet substrates on different sheet-like connecting outer skins are conductively connected to each other, and there is an open gap between the conductive sheet substrates on different sheet-like connecting outer skins for the carbon fiber cloth of the initial section of winding to penetrate.

[0009] As a further solution of the present invention: two sheet-shaped connecting outer skins are connected to each other, and the interconnected area and the connecting area are respectively located on two opposite sides of the detection area; the two sheet-shaped connecting outer skins have an elastic bending direction that brings the two conductive sheet substrates closer to each other.

[0010] As a further solution of the present invention: the sheet-shaped connecting outer skin is made of insulating material.

[0011] As a further solution of the present invention: the second electrical connection detection head of the second electrical connection detection member is extended out of the stacking range of the continuous coil along the axial direction of the reel.

[0012] As a further solution of the present invention: after the continuously prepared carbon fiber cloth is wound up, an anti-loosening sleeve is put on the periphery of the continuous roll.

[0013] As a further solution of the present invention: during pressing, both sides of the carbon fiber cloth are covered with insulating release paper; after pressing, a layer of insulating release paper is torn off, and then a layer of insulating protective film is covered on the side of the carbon fiber cloth without insulating release paper.

[0014] The present invention provides the following technical solution: a continuously rolled carbon fiber cloth is prepared by adopting the above-mentioned preparation process.

[0015] The present invention provides the following technical solution: the continuous coil prepared by the above-mentioned preparation process is tested, and when testing, the positive electrode and the negative electrode of the detection equipment are respectively connected to the first electrical connection detection head and the second electrical connection detection head, and then the current and / or current are applied to detect whether the carbon fiber cloth is continuous without a break.

[0016] Compared with the prior art, the beneficial effects of the technical solution are as follows: through the good electrical conductivity and continuity of the carbon fiber cloth, the first electrical connection detection head on the first electrical connection detection member connected to the carbon fiber cloth in the initial section of winding and the second electrical connection detection head on the second electrical connection detection member connected to the terminal section of winding can be electrically connected; when testing the product, without unfolding the continuously wound carbon fiber cloth, current and / or current can be applied to the first electrical connection detection head and the second electrical connection detection head to detect whether the carbon fiber cloth is continuous and without a break, thereby quickly determining whether there is a disconnection and rewinding in the entire length of the carbon fiber cloth roll; for purchasers, it can effectively avoid the purchase of carbon fiber cloth rolls with disconnection and rewinding, that is, it can effectively avoid the purchase of carbon fiber cloth rolls with waste carbon fiber cloth or poor carbon fiber cloth in the innermost layer of the roll, thereby reducing the risk of loss; for production enterprises, it can effectively restrict production enterprises from using disconnection and rewinding in the process of producing carbon fiber cloth rolls, thereby improving production quality.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic structural diagram of a pressing mechanism used in the preparation process of the present invention; Figure 2 is a schematic structural diagram of a first electrical connection detection member used in the preparation process of the present invention; Figure 3 yes Figure 2 Structural cross-sectional view along the AA direction; Figure 4 It is a schematic diagram of the structure after the carbon fiber cloth is inserted into the open gap in the preparation process of the present invention.

[0020] The corresponding reference numerals in the accompanying drawings are described as follows: Carbon fiber cloth-1, insulating release layer-2, reel-3, first electrical connection detection member-4, first electrical connection detection head-5, pressing mechanism-6, upper unwinding device-7, lower unwinding device-8, upper rewinding device-9, upper protective film unwinding device-10, insulating protective film-12, rewinding mechanism-13, Sheet-shaped connecting outer skin-401a, 401b, conductive sheet substrate-402a, 402b, adhesive layer-403a, 403b, opening gap-404, The first upper pressing roller -601, the first lower pressing roller -602, the second upper pressing roller -603, the second lower pressing roller -604. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-4 In this embodiment, a preparation process of a continuously rolled carbon fiber cloth is provided, and the preparation process comprises the following steps: S101, pressing a yarn sheet obtained by unwinding a plurality of carbon fiber tows continuously unwound and fed to obtain a continuously prepared carbon fiber cloth 1, and making at least one side of the continuously prepared carbon fiber cloth continuously covered with an insulating release layer 2; S102, then using the reel 3 to wind up the continuously prepared carbon fiber cloth 1, so that the continuously prepared carbon fiber cloth 1 forms a continuous roll on the reel 3; Among them, the continuous coil has an initial winding section located in the inner layer of the continuous coil and a winding termination section located in the outer layer of the connecting coil; before winding, the carbon fiber cloth in the initial winding section is connected to the first electrical connection detection component 4, and the first electrical connection detection component 4 has a first electrical connection detection head 5 that penetrates through the stacking range of the continuous coil along the axial direction of the reel 3; after winding is completed, the carbon fiber cloth in the winding termination section is connected to the second electrical connection detection component, and the second electrical connection detection component has a second electrical connection detection head.

[0023] The insulating release layer 2 is used to prevent the laminated structures formed after the carbon fiber cloth 1 is wound from contacting each other.

[0024] Through the good conductivity and continuity of the carbon fiber cloth 1, the first electrical connection detection head 5 on the first electrical connection detection member 4 connected to the carbon fiber cloth in the initial section of winding can be electrically connected to the second electrical connection detection head on the second electrical connection detection member connected to the end section of winding; when testing the product, without unfolding the continuously wound carbon fiber cloth 1, current and / or current can be applied to the first electrical connection detection head 5 and the second electrical connection detection head to detect whether the carbon fiber cloth is continuous and without a break, thereby quickly determining whether there is a disconnection and rewinding in the entire length of the carbon fiber cloth roll. For purchasers, it effectively avoids merchants from purchasing carbon fiber cloth rolls with disconnection and rewinding, and effectively avoids purchasing carbon fiber cloth rolls with waste carbon fiber cloth or poor carbon fiber cloth in the innermost layer of the roll, thereby reducing the risk of loss; for manufacturers, it can effectively restrict manufacturers from using disconnection and rewinding in the process of producing carbon fiber cloth rolls, thereby improving production quality.

[0025] In some embodiments, during pressing, both sides of the carbon fiber cloth 1 are covered with insulating release paper; after pressing, a layer of insulating release paper is torn off, and then a layer of insulating protective film 12 is covered on the side of the carbon fiber cloth 1 without insulating release paper.

[0026] like Figure 1 As shown, when the gauze is pressed by the first upper pressing roller 601 and the first lower pressing roller 602 of the pressing mechanism 6, the upper unwinding device 7 is used to unwind the upper insulating release paper onto the upper layer of the gauze to be pressed, and the lower unwinding device 8 is used to unwind the lower insulating release paper onto the lower layer of the gauze to be pressed; when pressing, the carbon fiber cloth 1 can be protected by the upper and lower layers of insulating release paper, especially for dust protection.

[0027] After the gauze is pressed to obtain the carbon fiber cloth 1, the upper insulating release paper is rolled up by the upper winding device 9, that is, the upper insulating release paper is torn off from the carbon fiber cloth 1; then the insulating protective film is unrolled by the upper protective film unwinding device 10; and then the insulating protective film is covered on the upper layer of the carbon fiber cloth 1 by bonding through the second upper pressing roller 603 and the second lower pressing roller 604 in the pressing mechanism 6.

[0028] In some embodiments, the carbon fiber cloth 1 can be rolled up by a winding mechanism 13 driven by a motor to drive a reel 3 to roll up the carbon fiber cloth 1 .

[0029] In this embodiment, the first electrical connection detection member 4 includes a sheet-shaped connection outer skin 401a, and a detection area and a connection area outside the detection area are provided on one side of the sheet-shaped connection outer skin 401a. A conductive sheet substrate 402a is bonded to the detection area, and a bonding layer 403a is bonded to the connection area. The first electrical connection detection head 5 of the first electrical connection detection member is connected to the conductive sheet substrate 402a. The sheet-shaped connection outer skin 401a is bonded to the initial winding section through the bonding layer 403a, and the conductive sheet substrate 402a is in laminated conductive contact with the carbon fiber cloth of the initial winding section.

[0030] Furthermore, the first electrical connection detection member 4 includes two sheet-like connection outer skins (401a, 401b) arranged along the thickness direction; each sheet-like connection outer skin (401a, 401b) is provided with a corresponding conductive sheet substrate (402a, 402b) and an adhesive layer (403a, 403b), and the conductive sheet substrate and the adhesive layer are both located on a side surface of the sheet-like connection outer skin opposite to the other sheet-like connection outer skin; wherein the conductive sheet substrates on different sheet-like connection outer skins are mutually conductively connected, and there is an open gap 404 between the conductive sheet substrates on different sheet-like connection outer skins for the carbon fiber cloth 1 of the initial section of winding to penetrate, that is, there is an open gap 404 between the conductive sheet substrate 402a and the conductive sheet substrate 402b.

[0031] Furthermore, the two sheet-shaped connecting skins (401a, 401b) are connected to each other, and the interconnected area and the connecting area are located at two opposite sides of the detection area, such as Figure 3 , 4 The two sheet-shaped connecting skins (401a, 401b) have an elastic bending direction that allows the two conductive sheet substrates (402a, 402b) to approach each other.

[0032] After the carbon fiber cloth 1 is inserted into the open gap 404, on the one hand, the two side surfaces of the carbon fiber cloth 1 can be glued close to each other through a total of two adhesive layers on different sheet-shaped connecting skins, so that the two conductive sheet substrates can make laminated conductive contact with the two side surfaces of the carbon fiber cloth 1. On the other hand, the two conductive sheet substrates can form elastic clamping on the carbon fiber cloth 1 through the two sheet-shaped connecting skins with elastic bending characteristics, so that the electrical connection between the conductive sheet substrate (402a, 402b) and the carbon fiber cloth 1 is more stable, which is more conducive to the accuracy of subsequent detection results.

[0033] It is worth noting that when the two sides of the carbon fiber cloth 1 are respectively covered with the insulating protective film 12 and the insulating release paper (insulating release layer 2): in the process of inserting the carbon fiber cloth 1 into the opening gap 404, as shown in FIG. Figure 4 As shown, first tear off a portion of the insulating protective film 12 and a portion of the insulating release paper on the edge of the carbon fiber cloth 1, so that the carbon fiber cloth 1 can be inserted into the opening gap 404 and can contact the conductive sheet substrate (402a, 402b); after the insertion and gluing are completed, the torn insulating protective film 12 and insulating release paper are respectively covered on the outside of the corresponding sheet-shaped connecting outer skin (401a, 401b). There is no need to cut off the torn insulating protective film and insulating release paper, and the torn insulating protective film and insulating release paper can be used to form a covering for the sheet-shaped connecting outer skin to increase the difficulty of separating the conductive sheet substrate from the carbon fiber cloth.

[0034] The first electrical connection detection head 5 is, for example, a portion of the structure extending from the conductive sheet substrate, or a connector having an interface connected to the conductive sheet substrate (whose conductive terminals or wires are connected to the conductive sheet substrate), or a conductive metal wire segment connected to the conductive sheet substrate... and other components with conductive extension functions, which can correspondingly extend the electrical connection position of the conductive sheet substrate out of the stacking range of the continuous coil.

[0035] In some embodiments, the sheet-shaped connecting outer skin is made of insulating material, such as an elastic outer skin made of PU, TPU, etc. The sheet-shaped connecting outer skin has a certain thickness, so it can also be understood as a block-shaped connecting outer skin, whose thickness direction corresponds to the thickness direction of the carbon fiber cloth, and whose length direction corresponds to the width direction of the carbon fiber cloth.

[0036] In some embodiments, the conductive sheet substrate is a conductive metal sheet substrate having a bending property.

[0037] In this embodiment, the structural setting of the second electrical connection detection component can refer to the setting of the first electrical connection detection component, but the difference is: the adhesive layer of the second electrical connection detection component is glued to the winding termination section, and the conductive sheet substrate of the second electrical connection detection component is in layered conductive contact with the carbon fiber cloth of the winding termination section.

[0038] In some embodiments, the second electrical connection detection head of the second electrical connection detection member penetrates out of the stacking range of the continuous coil along the axial direction of the roll.

[0039] In some embodiments, after the continuously prepared carbon fiber cloth is rolled up, an anti-loosening sleeve is placed on the periphery of the continuous roll.

[0040] In some embodiments, the upper layer of insulating release paper unwound by the upper unwinding device 7 has resin on it; the lower layer of insulating release paper unwound by the lower unwinding device 8 has resin on it; when entering the pressing surface of the first upper pressing roller 601 and the first lower pressing roller 602, the resin on the insulating release paper corresponds to the gauze.

[0041] At least one of the first upper pressing roller 601 and the first lower pressing roller 602 is a pressing roller with a heating function. During pressing, the resin on the insulating release paper is heated at the same time, so that the resin on the insulating release paper can be impregnated into the gauze, so that the carbon fiber cloth obtained after pressing is a carbon fiber prepreg cloth.

[0042] The pressing roller with heating function is, for example, a pressing roller into which hot liquid can be passed.

[0043] In some embodiments, a plurality of piercing needles (not shown) are formed on one side of the conductive sheet substrate corresponding to the carbon fiber cloth and arranged at intervals along the length direction of the conductive sheet substrate. The piercing needles should penetrate into the carbon fiber cloth to make piercing conductive contact with the carbon fiber cloth.

[0044] More preferably, when there are two conductive sheet substrates (402a, 402b), the puncture needles on the conductive sheet substrate 402a and the puncture needles on the conductive sheet substrate 402b are arranged in a staggered manner.

[0045] In some embodiments, when the conductive sheet substrate is in contact with the carbon fiber cloth, especially when the carbon fiber prepreg is in laminated contact and penetration contact, the positive electrode of the heating circuit of a power supply device and the negative electrode of the heating circuit are electrically connected to the electrical connection detection head (the first electrical connection detection head and the second electrical connection detection head are electrically connected) and the conductive sheet substrate (the conductive sheet substrate of the first electrical connection detection component and the conductive sheet substrate of the second electrical connection detection component), respectively, and then power is turned on so that the conductive sheet substrate and the penetration needle can be electrically heated; so that the resin impregnated at the corresponding position on the carbon fiber cloth can be heated to soften and / or heat-melt, thereby making the laminated conductive contact between the conductive sheet substrate and the carbon fiber cloth, and the penetration conductive contact between the penetration needle and the carbon fiber cloth smoother.

[0046] In some embodiments, during the pressing process, the initial winding section and the final winding section are not impregnated with resin, and conductive contact can be made directly.

[0047] In this embodiment, a finished product detection method is actually proposed, and the finished product detection method is to detect the continuous coil material prepared by the preparation process of any of the above embodiments.

[0048] During the detection, the detection positive electrode and the detection negative electrode of the detection equipment are connected to the first electrical connection detection head 5 and the second electrical connection detection head respectively, and then the current and / or current are applied to detect whether the carbon fiber cloth is continuous without a short circuit, that is, to detect whether there is a short circuit in the electrical connection from the first electrical connection detection head 5-the first electrical connection detection member 4-the carbon fiber cloth 1-the second electrical connection detection member-the second electrical connection detection head, so that without unrolling the carbon fiber cloth roll, it is possible to quickly determine whether the carbon fiber cloth roll is a continuous roll, and the detection is more convenient.

[0049] In some embodiments, the detection device may be a multimeter, which has a high popularity, is easy to use, and has a low cost.

[0050] In this embodiment, a continuously rolled carbon fiber cloth is actually proposed, which is prepared by the preparation process of any of the above embodiments. The carbon fiber cloth roll formed finally has the corresponding first electrical connection detection head 5, first electrical connection detection member 4, second electrical connection detection member, and second electrical connection detection head.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A process for preparing a continuously rolled carbon fiber cloth, characterized in that: The preparation process comprises the following steps: The yarn sheets obtained by unwinding the continuous unwinding and feeding of the plurality of carbon fiber tows are pressed to obtain a continuously prepared carbon fiber cloth, and at least one side of the continuously prepared carbon fiber cloth is continuously covered with an insulating release layer; Then, the continuously prepared carbon fiber cloth is rolled up by a reel, so that the continuously prepared carbon fiber cloth forms a continuous roll on the reel; Among them, the continuous coil has an initial winding section located in the inner layer of the continuous coil and a winding termination section located in the outer layer of the connecting coil; before winding, the carbon fiber cloth in the initial winding section is connected to the first electrical connection detection component, and the first electrical connection detection component has a first electrical connection detection head that penetrates through the stacking range of the continuous coil along the axial direction of the reel; after winding is completed, the carbon fiber cloth in the winding termination section is connected to the second electrical connection detection component, and the second electrical connection detection component has a second electrical connection detection head.

2. The preparation process according to claim 1, characterized in that: The first electrical connection detection member comprises a sheet-shaped connection outer skin, wherein one side of the sheet-shaped connection outer skin has a detection area and a connection area outside the detection area, the detection area is bonded with a conductive sheet substrate, and the connection area is bonded with an adhesive layer; The first electrical connection detection head of the first electrical connection detection member is connected to the conductive sheet substrate; The sheet-shaped connecting outer skin is bonded to the initial winding section through the bonding layer, and the conductive sheet substrate is in laminated conductive contact with the carbon fiber cloth of the initial winding section.

3. The preparation process according to claim 2, characterized in that: The first electrical connection detection member includes two sheet-shaped connection outer skins arranged along the thickness direction; Each sheet-shaped connecting outer skin is provided with a corresponding conductive sheet substrate and an adhesive layer, and the conductive sheet substrate and the adhesive layer are both located on a side surface of the sheet-shaped connecting outer skin opposite to another sheet-shaped connecting outer skin; The conductive sheet substrates on different sheet-shaped connecting outer skins are conductively connected to each other, and there are openings between the conductive sheet substrates on different sheet-shaped connecting outer skins, which are suitable for the carbon fiber cloth in the initial stage of winding to penetrate.

4. The preparation process according to claim 3, characterized in that: The two sheet-shaped connecting skins are connected to each other, and the interconnected area and the connecting area are located at two opposite sides of the detection area respectively; The two sheet-shaped connecting skins have an elastic bending direction that allows the two conductive sheet substrates to approach each other.

5. The preparation process according to claim 2, characterized in that: The sheet connection outer skin is made of insulating material.

6. The preparation process according to any one of claims 1 to 5, characterized in that: The second electrical connection detection head of the second electrical connection detection member penetrates the stacking range of the continuous coil along the axial direction of the reel.

7. The preparation process according to claim 6, characterized in that: After the continuously prepared carbon fiber cloth is wound up, an anti-loosening sleeve is set on the periphery of the continuous roll.

8. The preparation process according to claim 1 or 2 or 3 or 4 or 5 or 7, characterized in that: When pressing, both sides of the carbon fiber cloth are covered with insulating release paper; After the pressing is completed, a layer of insulating release paper is torn off, and then a layer of insulating protective film is covered on the side of the carbon fiber cloth that does not have the insulating release paper.

9. A continuously rolled carbon fiber cloth, characterized in that: The preparation is obtained by the preparation process described in any one of claims 1 to 8.

10. A finished product detection method, characterized in that: The continuous coil prepared by the preparation process according to any one of claims 1 to 8 is tested. When testing, the positive electrode and negative electrode of the testing device are connected to the first electrical connection testing head and the second electrical connection testing head respectively, and then current and / or current are applied to detect whether the carbon fiber cloth is continuous without disconnection.

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