Multi-roll automatic material changing winding and unwinding equipment and coating machine

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a multi-roll automatic reloading winding and unwinding device and a coating machine, which comprise a workbench and a reloading mechanism, the workbench is rotatably provided with a central reloading roller, the central reloading roller is provided with a plurality of winding rollers, all the winding rollers are rotatably mounted on the central reloading roller, and the central reloading roller is rotatably mounted on the central reloading roller. The workbench is provided with a first driving part, the first driving part is used for driving the central roll changing roller to rotate around the axis, each roll material roller is detachably provided with a roll core used for winding and unwinding roll materials and is provided with a second driving part, and the second driving part is used for driving the corresponding roll material roller to rotate around the axis; and the material changing mechanism is used for separating the continuous roll material on the roll core of the roll material roller and connecting the separated roll material to the adjacent roll core of the roll material roller located at the working position. The method has the advantages that the time of a traditional roll changing mode is saved, and the lithium battery production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a multi-roll automatic material changing and unwinding device and a coating machine. Background Art

[0002] The lithium battery coating process is an indispensable part of the lithium battery production process. The control of its process capability not only directly affects the performance of the lithium battery, but also affects the battery production efficiency. Among them, the equipment involved in the lithium battery coating process mainly includes the electrode unwinding mechanism, the coating mechanism, the electrode baking mechanism, the winding mechanism, etc., and in the winding and unwinding process, when the coil is full or the unwinding is exhausted, the equipment needs to suspend operation and wait for the staff to manually change the coil. This type of coil changing method has a high work intensity, and with the development of lithium battery coating technology, the work efficiency of this coil changing method combined with the existing winding and unwinding equipment is low, which will reduce the battery production efficiency. Therefore, there is an urgent need for a multi-roll automatic material changing and winding and unwinding equipment that can operate efficiently. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the present application provides a multi-roll automatic material changing and unwinding device.

[0004] The above invention objectives of this application are achieved through the following technical solutions:

[0005] A multi-roll automatic material changing and unwinding device comprises a workbench and a material changing mechanism, the workbench being rotatably provided with a central roll-changing roller, the central roll-changing roller being provided with a plurality of winding rollers, all of the winding rollers being rotatably mounted on the central roll-changing roller, the workbench being provided with a first driving member, the first driving member being used to drive the central roll-changing roller to rotate about an axis, each of the winding rollers being detachably provided with a winding core for unwinding and rewinding the roll and being provided with a second driving member, a working position being provided on the rotation path of the central roll-changing roller, and when any of the winding rollers is located at the working position, the second driving member being used to drive the corresponding winding roller to rotate about an axis;

[0006] There is a material changing position on the rotation path of the central winding roller. When any of the winding rollers is located at the material changing position, the material changing mechanism is used to separate the continuous coil on the winding core of the winding roller and connect the detached coil to the adjacent winding roller core located at the working position.

[0007] The cam is then moved to the next position so that the cam can be moved to the next position and the new cam is moved to the next position so that the cam can be moved to the next position so that the cam can be moved to the next position.

[0008] In a preferred example, the present application can be further configured as follows: the material changing mechanism includes a mounting table, the mounting table is rotatably provided with a material changing rack, the material changing rack is provided with a cutter for abutting the coiled material, and the mounting table is provided with a third driving member. When any of the coiling rollers is located at the material changing position and the coiled material of the coiling roller core is in a continuous state, the third driving member is used to drive the material changing rack to drive the cutter to swing close to the continuous coiled material of the coiling roller core.

[0009] By adopting the above technical solution, a mounting table is set up to provide an installation position for each component, and by setting up a material changing rack, the third driving member can drive the cutter to swing on the conveying path of the coil, so as to facilitate the cutting of the continuous coil and complete the separation operation.

[0010] In a preferred example, the present application can be further configured as follows: an adhesive layer is provided on the winding core, and when any of the winding rollers is located at the working position, the adhesive layer on the winding roller core is used to abut the winding material detached from the winding roller core adjacent to the winding roller located at the material changing position.

[0011] By adopting the above technical solution, an adhesive layer is provided to facilitate bonding the detached coil to the new coil core, thereby completing the connection between the new and old materials.

[0012] In a preferred example, the present application can be further configured as follows: the material changing rack is provided with a material supporting member, and when the cutter abuts against the continuous coil, the material supporting member is used to support the detached coil.

[0013] By adopting the above technical solution, when the third driving member drives the cutter to swing to the continuous coil to complete the separation operation, the material supporting member can support the detached coil to facilitate the connection of the new and old coils.

[0014] In a preferred example, the present application can be further configured as follows: all the winding rollers are arranged equidistantly on the central winding roller along the circumference direction of the central winding roller.

[0015] By adopting the above technical solution, all the coil rollers are arranged at equal distances so that they can be reeled in or unreeled or changed simultaneously, thereby improving overall work efficiency.

[0016] In a preferred example, the present application can be further configured as follows: the multi-roll automatic material changing and unwinding equipment also includes a correction mechanism. When any of the winding rollers is in the working position, the correction mechanism is used to detect the consistency between the winding and unwinding direction of the winding roller core and the rotation direction of the winding roller, and drive any of the winding rollers to move axially along the central winding roller.

[0017] By adopting the above technical solution, a deviation correction mechanism is set to ensure that the coil can be smoothly and accurately wound and unwound in a predetermined direction, thereby improving the quality of battery production.

[0018] In a preferred example, the present application can be further configured as follows: the deflection correction mechanism includes a deflection correction sensor and a control system, the deflection correction sensor is arranged on the material changing mechanism and is used to detect the offset when the coil passes through, the position of the central roll changing roller corresponding to each of the roll changing rollers is axially provided with a deflection correction linear module, the deflection correction linear module is slidably mounted with a slide, the roll changing roller is rotatably mounted on the slide, the deflection correction linear module and the deflection correction sensor are both control-connected to the control system.

[0019] By adopting the above technical solution, when the coil passes through the correction sensor on the mounting table during the winding and unwinding process, the correction sensor detects the offset of the coil in real time and transmits this information to the control system. The control system controls the corresponding correction linear module to start according to the received offset data, and drives the slide mounted on the correction linear module to make fine adjustments along the axial direction until the coil returns to the correct position. This process realizes the automatic and precise correction of the coil offset, ensuring the stability of winding and unwinding and the quality of the product.

[0020] In a preferred example, the present application can be further configured as follows: the number of the slide is one, one end of the winding roller is rotatably mounted on the slide and the other end is suspended, and the rotating shaft of the winding roller is an inflatable shaft.

[0021] By adopting the above technical solution, a cantilever structure is formed. When unloading, the air-expanding shaft is deflated, and the core can be taken out or put in by coaxial horizontal translation, which is convenient for the staff to take and put in, thereby improving work efficiency. At the same time, the air-expanding shaft can control the fixing or unlocking of the core through the inflation and deflation operations, which can facilitate the disassembly of the core.

[0022] In a preferred example, the present application can be further configured as follows: the number of the slides is two and they are symmetrically arranged, both of the slides are provided with a rotating groove for accommodating the rotating shaft of the winding roller and a safety chuck is slidably arranged, the safety chuck is used to close the rotating groove, and the rotating shaft of the winding roller is rotatably installed between the two symmetrical rotating grooves.

[0023] By adopting the above technical solution, the two symmetrically arranged rotation grooves can provide a double-ended rotation position for the rotating shaft of the winding roller, and after installation, the rotation grooves can be closed in conjunction with the sliding safety chuck to prevent the rotating shaft of the winding roller from detaching from the rotation grooves. When unloading, the opening and closing of the rotation grooves are controlled by the sliding operation of the safety chuck to facilitate the disassembly of the winding core.

[0024] Another object of the present application is to provide a coating machine, comprising a coating mechanism, a baking mechanism, a traction mechanism and a multi-roll automatic material changing and unwinding device as described in any one of claims 1 to 9, wherein the coating mechanism is used to coat the coil material, the baking mechanism is used to heat and dry the coated coil material, and the traction mechanism is used to guide and pull the coil material and provide conveying power. The coil material is output from the multi-roll automatic material changing and unwinding device, passes through the coating mechanism, baking mechanism and traction mechanism in sequence, and then returns to the multi-roll automatic material changing and unwinding device.

[0025] By adopting the above technical solution, when used as an unwinding mechanism, the roll material is unwound by any roll roller in cooperation with the corresponding second driving member, and the roll material is rotated back after passing through the coating mechanism, baking mechanism, traction mechanism and other equipment in the coating equipment. At this time, as a winding mechanism, the roll material is wound by another roll roller in cooperation with the corresponding second driving member to complete the entire coating process, and the unwinding and winding processes are combined into one to form a circular conveying route for the roll material in the shape of a U-shaped character. While achieving seamless connection and efficient production, it can also save equipment space, and the processes are more compact and smooth, so that the development of the coating process is not limited to the extension of the horizontal assembly line, and the equipment can be extended to the vertical space, thereby improving space utilization.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] The material changing mechanism then separates the continuous material on the winding roller core at the material changing position, and connects the detached material to the winding roller core adjacent to the working position to complete the connection between the old and new material. At the same time, the winding roller switched to the working position drives the connected winding core to continue to rewind and unwind, so as to achieve seamless reel change and continuous rewinding and unwinding processes. At this time, the staff can replace the winding core on the winding roller at the material changing position without affecting the winding roller at the working position, saving time in the traditional reel changing method and improving the production efficiency of lithium batteries.

[0028] 2. By setting up a mounting table, it is possible to provide an installation position for each component, and by setting up a material changing rack, the third driving member can drive the cutter to swing on the conveying path of the coil, so as to cut the continuous coil and complete the separation operation, and by setting up an adhesive layer, the detached coil can be bonded to the new coil core, thereby completing the connection between the new and old materials.

[0029] 3. When the coil passes the correction sensor on the mounting table during the winding and unwinding process, the correction sensor detects the offset of the coil in real time and transmits this information to the control system. The control system controls the corresponding correction linear module to start according to the received offset data, and drives the slide mounted on the correction linear module to make fine adjustments along the axial direction until the coil returns to the correct position. This process realizes the automatic and precise correction of the coil offset, ensuring the stability of winding and unwinding and the quality of the product.

[0030] 4. When used as an unwinding mechanism, the coil is unwound by any coil roller in cooperation with the corresponding second driving member. After the coil passes through the coating mechanism, baking mechanism, traction mechanism and other equipment in the coating equipment, it rotates back. At this time, as a winding mechanism, the coil is wound by another coil roller in cooperation with the corresponding second driving member to complete the entire coating process, combining the unwinding and winding processes into one, so that the coil forms a circular conveying route in the shape of a U.S. character. While achieving seamless connection and efficient production, it can also save equipment space, and the processes are more compact and smooth, so that the development of the coating process is not limited to the extension of the horizontal assembly line, and the equipment can be extended to the vertical space, thereby improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of a multi-roll automatic material changing and unwinding device in one embodiment of the present application;

[0032] Figure 2 This is a partial structural diagram of a multi-roll automatic material changing and unwinding device in another embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the conveying route of the coil in the multi-roll automatic material changing and unwinding equipment in one embodiment of the present application;

[0034] Figure 4 It is a schematic diagram of the overall structure of a multi-roll automatic material changing and unwinding device and a coating machine in one embodiment of the present application.

[0035] Figure numerals: 1. Workbench; 2. Material changing mechanism; 21. Mounting table; 22. Material changing rack; 23. Cutter; 24. Third driving member; 25. Material supporting member; 3. Center reel-changing roller; 4. Reeling roller; 5. First driving member; 6. Second driving member; 7. Correction mechanism; 71. Correction sensor; 72. Correction linear module; 8. Slide; 9. Pneumatic shaft; 10. Safety chuck; 11. Coating mechanism; 12. Baking mechanism; 13. Traction mechanism. DETAILED DESCRIPTION

[0036] The following description of exemplary embodiments of the present application is made in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0037] It should be noted that the terms "first," "second," and the like in this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the disclosure described herein can be implemented in an order other than that illustrated or described herein. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0038] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates an "or" relationship between the related objects.

[0039] The following describes a multi-roll automatic material changing and unwinding device of the present application with reference to the accompanying drawings.

[0040] Reference Figures 1 to 3 , among which, Figure 1 and Figure 3As shown, the multi-roll automatic material changing and unwinding equipment includes a workbench 1 and a material changing mechanism 2. The workbench 1 is rotatably provided with a central roll changing roller 3. The central roll changing roller 3 is provided with a plurality of winding rollers 4. All the winding rollers 4 are arranged along the circumference direction of the central roll changing roller 3 and are rotatably installed on the central roll changing roller 3. The workbench 1 is provided with a first driving member 5. The first driving member 5 is used to drive the central roll changing roller 3 to rotate on its own axis. Each winding roller 4 is detachably provided with a winding core for winding and unwinding the coil and is provided with a second driving member 6. In the rotation path of the central roll changing roller 3, There is a working position on the center winding roller 3. When any winding roller 4 is in the working position, the second driving member 6 is used to drive the corresponding winding roller 4 to rotate about its own axis. There is a material changing position on the rotation path of the center winding roller 3. The first driving member 5 and the second driving member 6 can both be motors. By coaxially installing the output shaft of the motor to the center winding roller 3 and the winding roller 4 respectively, the center winding roller 3 and the winding roller 4 can be directly driven to rotate about their own axes. When any winding roller 4 is in the material changing position, the material changing mechanism 2 is used to separate the continuous coil on the winding core of the winding roller 4. The material roller 4 that has been detached is connected to the winding core of adjacent material roller 4 that is located in the working position. During operation, the material roller 4 located in the working position cooperates with the second driving member 6 to continuously carry out the winding and unwinding work of the material. Then, when the material winding of the winding core of the material roller 4 at the working position is about to be wound up or about to be unwound, the first driving member 5 drives the center winding roller 3 to rotate about its axis, and the material roller 4 switches from the working position to the material changing position. Then, under the action of the material changing mechanism 2, the continuous material on the winding core of the material roller 4 at the material changing position is separated, and the detached material is connected to the winding core of the adjacent material roller 4 that is located in the working position, completing the connection between the old and new material. At the same time, the material roller 4 that has been switched to the working position drives the connected core to continue to wind and unwind, so as to realize the process of seamlessly connecting the winding and continuous winding and unwinding. At this time, the staff can replace the winding core on the material changing roller 4 at the material changing position without affecting the winding roller 4 at the working position, saving the time of the traditional winding method and improving the production efficiency of lithium batteries.

[0041] It should be noted that the number of winding rollers 4 can be two, three, four, etc., and the number of material changing mechanisms 2 can be set to two groups. By arranging the two groups of material changing mechanisms 2 on the opposite sides of the workbench 1 respectively, the two groups of material changing mechanisms 2 can respectively correspond to the material changing work of the winding core of the winding roller 4 responsible for winding and unwinding.

[0042] The material changing mechanism 2 includes a mounting platform 21, on which a material changing rack 22 is rotatably provided. The material changing rack 22 is provided with a cutter 23 for abutting the coil material. The mounting platform 21 is provided with a third driving member 24. When any coiling roller 4 is in the material changing position and the coil material of the coiling core of the coiling roller 4 is in a continuous state, the third driving member 24 is used to drive the material changing rack 22 to drive the cutter 23 to swing close to the continuous coil material of the coiling core of the coiling roller 4. The third driving member 24 can be optionally a cylinder. By fixing the piston rod of the cylinder to one end of the material changing rack 22, the swinging operation of the material changing rack 22 can be realized under the telescopic action of the cylinder piston rod. By setting up the mounting platform 21, an installation position can be provided for each component. By setting up the material changing rack 22, the third driving member 24 can be used to drive the cutter 23 to swing on the conveying path of the coil material, so as to cut the continuous coil material and complete the separation operation.

[0043] Furthermore, an adhesive layer (not shown in the figure) is provided on the winding core. When any winding roller 4 is in the working position, the adhesive layer on the winding core of the winding roller 4 is used to abut the winding material detached from the winding core of the adjacent winding roller 4 located in the material changing position. By providing the adhesive layer, the detached winding material can be bonded to the new winding core, thereby completing the connection between the new and old materials.

[0044] Specifically, the adhesive layer can be selected as double-sided tape, that is, after the winding core of the winding roller 4 located at the material changing position is replaced, double-sided tape can be glued to the outside of the replaced winding core by manual or mechanical equipment to facilitate the bonding of the detached winding material to the new winding core. It should be noted that the winding core can be an empty winding core for winding or a full winding core for unwinding.

[0045] Furthermore, the material changing rack 22 is provided with a material supporting member 25. When the cutter 23 abuts against the continuous coil, the material supporting member 25 is used to support the detached coil. When the third driving member 24 drives the cutter 23 to swing to the continuous coil to complete the separation operation, the material supporting member 25 can support the detached coil to facilitate the connection of the new and old coils.

[0046] In addition, the multi-roll automatic material changing and unwinding equipment also includes a correction mechanism 7. When any winding roller 4 is in the working position, the correction mechanism 7 is used to detect the consistency between the winding and unwinding direction of the winding core of the winding roller 4 and the rotation direction of the winding roller 4, and drive any winding roller 4 to move axially along the center winding roller 3. By setting the correction mechanism 7, it is ensured that the winding and unwinding work can be carried out smoothly and accurately in the predetermined direction, thereby improving the battery production quality.

[0047] Specifically, the correcting mechanism 7 includes a correcting sensor 71 and a control system. The correcting sensor 71 is arranged on the material changing mechanism 2 and is used to detect the offset of the coil when it passes through. The central coil changing roller 3 is axially provided with a correcting linear module 72 corresponding to the position of each coil changing roller. The correcting linear module 72 is slidably installed with a slide 8, and the coil changing roller is rotatably installed on the slide 8. The correcting linear module 72 and the correcting sensor 71 are both connected to the control system control. When the coil passes through the correcting sensor 71 on the mounting table 21 during the winding and unwinding process, the correcting sensor 71 detects the offset of the coil in real time and transmits this information to the control system. The control system controls the corresponding correcting linear module 72 to start according to the received offset data, and drives the slide 8 slidably installed on the correcting linear module 72 to perform fine-tuning along the axial direction until the coil returns to the correct position. This process realizes the automatic and precise correction of the coil offset, ensuring the stability of winding and unwinding and product quality.

[0048] Among them, such as Figure 2 As shown, in one embodiment, the number of slides 8 is one, one end of the winding roller 4 is rotatably mounted on the slide 8 and the other end is suspended to form a cantilever structure, and the rotating axis of the winding roller 4 is an inflatable shaft 9. When unloading, the inflatable shaft is deflated, and the winding core can be coaxially translated horizontally to be taken out or put in, which is convenient for the staff to take and put, thereby improving work efficiency. At the same time, the inflatable shaft 9 can control the fixing or unlocking of the winding core through the inflation and deflation operations, which can facilitate the disassembly of the winding core.

[0049] In another embodiment, Figure 1 As shown, there are two slides 8 and they are symmetrically arranged. Both slides 8 are provided with a rotating groove for accommodating the rotating shaft of the winding roller 4 and a safety chuck 10 is slidably arranged. The safety chuck 10 is used to close the rotating groove. The rotating shaft of the winding roller 4 is rotatably installed between the two symmetrical rotating grooves. By adopting two symmetrically arranged rotating grooves, the rotating shaft of the winding roller 4 can be provided with a double-ended rotating position, and after the installation is completed, the rotating groove can be closed in conjunction with the sliding safety chuck 10 to prevent the rotating shaft of the winding roller 4 from detaching from the rotating groove. When unloading, the opening and closing of the rotating groove is controlled by the sliding operation of the safety chuck 10 to facilitate the disassembly of the winding core.

[0050] The implementation principle of a multi-roll automatic material changing and unwinding equipment in Example 1 of the present application is: during continuous work, the winding roller 4 located in the working position cooperates with the second driving member 6 to wind and unwind the material. When the winding and unwinding are about to be completed, the first driving member 5 drives the central winding roller 3 to rotate, and switches the winding roller 4 to the material changing position. At the same time, the material changing mechanism 2 separates the continuous rolls through the cutter 23, and uses the adhesive layer to bond the detached rolls to the winding roller 4 at the adjacent working position to complete the connection between the new and old rolls. At the same time, the correction mechanism 7 monitors and corrects the roll deviation in real time to ensure the stable progress of the winding and unwinding work, and the staff can easily replace the roll core of the winding roller 4 at the material changing position to achieve seamless connection and efficient production. Example

[0051] like Figure 4 As shown, a coating machine includes a coating mechanism, a baking mechanism, a traction mechanism and the above-mentioned multi-roll automatic material changing and unwinding device. The coating mechanism is used to coat the coil material, the baking mechanism is used to heat and dry the coated coil material, and the traction mechanism is used to guide and pull the coil material to provide conveying power. The coil material is output from the multi-roll automatic material changing and unwinding device, passes through the coating mechanism, baking mechanism and traction mechanism in sequence, and then rotates back to the multi-roll automatic material changing and unwinding device. With the above-mentioned arrangement, the multi-roll automatic material changing and unwinding device can be used as an unwinding mechanism and a rewinding mechanism in both the single-sided coating device and the double-sided coating device at the same time. When used as an unwinding mechanism, through any roll The material roller 4 cooperates with the corresponding second driving member 6 to unwind the coiled material. After the coiled material passes through the coating mechanism 11, baking mechanism 12, traction mechanism 13 and other equipment in the coating equipment, it rotates back. At this time, it serves as a winding mechanism, and another coiled material roller 4 cooperates with the corresponding second driving member 6 to wind the coiled material to complete the entire coating process. The present application can combine the unwinding and winding processes into one, so that the coiled material forms a circular conveying route in the shape of a U-shaped character. While achieving seamless connection and efficient production, it can also save equipment space, and the processes are more compact and smooth, so that the development of the coating process is not limited to the extension of the horizontal assembly line, and the equipment can be extended to the vertical space to improve space utilization.

[0052] It should be noted that the above-mentioned coating mechanism, baking mechanism and traction mechanism can all be operated using conventional equipment on the market, and no limitation is imposed here.

[0053] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A multi-roll automatic material changing and unwinding equipment, characterized in that: include: A workbench (1) and a material changing mechanism (2), wherein the workbench (1) is rotatably provided with a central roll-changing roller (3), the central roll-changing roller (3) is provided with a plurality of winding rollers (4), all of the winding rollers (4) are rotatably mounted on the central roll-changing roller (3), the workbench (1) is provided with a first driving member (5), the first driving member (5) is used to drive the central roll-changing roller (3) to rotate about its axis, each of the winding rollers (4) is detachably provided with a winding core for reeling in and out the winding material and is provided with a second driving member (6), a working position exists on the rotation path of the central roll-changing roller (3), and when any of the winding rollers (4) is located at the working position, the second driving member (6) is used to drive the corresponding winding roller (4) to rotate about its axis; There is a material changing position on the rotation path of the central winding roller (3). When any of the winding rollers (4) is located at the material changing position, the material changing mechanism (2) is used to separate the continuous winding material on the winding core of the winding roller (4) and connect the detached winding material to the winding core of the adjacent winding roller (4) located at the working position.

2. The multi-roll automatic material changing and unwinding equipment according to claim 1, characterized in that: The material changing mechanism (2) comprises a mounting platform (21), a material changing frame (22) is rotatably provided on the mounting platform (21), a cutter (23) is provided on the material changing frame (22) for contacting the coiled material, and a third driving member (24) is provided on the mounting platform (21). When any of the coiling rollers (4) is located at the material changing position and the coiled material of the coiling core of the coiling roller (4) is in a continuous state, the third driving member (24) is used to drive the material changing frame (22) to drive the cutter (23) to swing close to the continuous coiled material of the coiling core of the coiling roller (4).

3. The multi-roll automatic material changing and unwinding equipment according to claim 1, characterized in that: The winding core is provided with an adhesive layer. When any of the winding rollers (4) is located at the working position, the adhesive layer on the winding core of the winding roller (4) is used to abut against the winding material detached from the winding core of the adjacent winding roller (4) located at the material changing position.

4. The multi-roll automatic material changing and unwinding equipment according to claim 2, characterized in that: The material changing rack (22) is provided with a material supporting member (25). When the cutter (23) abuts against the continuous coil, the material supporting member (25) is used to support the detached coil.

5. The multi-roll automatic material changing and unwinding equipment according to claim 1, characterized in that: All the coiling rollers (4) are arranged equidistantly on the central coil-changing roller (3) along the circumference direction of the central coil-changing roller (3).

6. The multi-roll automatic material changing and unwinding equipment according to claim 1, characterized in that: The multi-roll automatic material changing and unwinding equipment also includes a correction mechanism (7). When any of the winding rollers (4) is in the working position, the correction mechanism (7) is used to detect the consistency between the winding and unwinding direction of the winding core of the winding roller (4) and the rotation direction of the winding roller (4), and drive any of the winding rollers (4) to move axially along the central winding roller (3).

7. The multi-roll automatic material changing and unwinding equipment according to claim 6, characterized in that: The deflection correction mechanism (7) includes a deflection correction sensor (71) and a control system. The deflection correction sensor (71) is arranged on the material changing mechanism (2) and is used to detect the offset of the coil when the coil passes through. The central roll changing roller (3) is provided with a deflection correction linear module (72) along the axial direction corresponding to the position of each roll changing roller. The deflection correction linear module (72) is slidably mounted with a slide (8). The roll changing roller is rotatably mounted on the slide (8). The deflection correction linear module (72) and the deflection correction sensor (71) are both connected to the control system for control.

8. The multi-roll automatic material changing and unwinding equipment according to claim 7, characterized in that: The number of the slide (8) is one, one end of the coiling roller (4) is rotatably mounted on the slide (8) and the other end is suspended, and the rotating shaft of the coiling roller (4) is an inflatable shaft (9).

9. The multi-roll automatic material changing and unwinding equipment according to claim 7, characterized in that: The number of the slides (8) is two and they are symmetrically arranged. Both slides (8) are provided with a rotation groove for accommodating the rotation axis of the winding roller (4) and a safety chuck (10) is slidably arranged. The safety chuck (10) is used to close the rotation groove. The rotation axis of the winding roller (4) is rotatably installed between the two symmetrical rotation grooves.

10. A coating machine, characterized in that: include: A coating mechanism (11), a baking mechanism (12), a traction mechanism (13), and a multi-roll automatic material-changing and rewinding device as described in any one of claims 1 to 9, wherein the coating mechanism (11) is used to coat the coil material, the baking mechanism (12) is used to heat and dry the coated coil material, and the traction mechanism (13) is used to guide and pull the coil material and provide conveying power. The coil material is output from the multi-roll automatic material-changing and rewinding device, passes through the coating mechanism (11), the baking mechanism (12) and the traction mechanism (13) in sequence, and then returns to the multi-roll automatic material-changing and rewinding device.

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