A protective film cutting and winding device with convenient roll changing

Abstract

The application discloses a protective film cutting and winding device with convenient roll changing, which comprises a mounting seat, two rotating seats are synchronously rotationally connected in the mounting seat through a first driving assembly, at least two connecting seats are arranged on the rotating seats at intervals in the circumferential direction, winding shafts for winding the protective film are rotationally connected between the connecting seats on the two rotating seats, one end of the winding shaft is provided with a connecting part, and the connecting part is used for being detachably transmissionally connected with a second driving assembly arranged on the mounting seat when the winding shaft rotates with the rotating seat to a roll changing station. Through the arrangement of the two synchronously rotatable rotating seats on the mounting seat and the arrangement of the at least two connecting seats on the rotating seats in the circumferential direction, the plurality of winding shafts can be switched to the stations by rotating with the rotating seat. When one winding shaft is completed, the rotating seat is rotated to switch another empty winding shaft to the winding station, so that the roll changing is realized without stopping the machine, and the production efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of protective film production equipment, specifically, it relates to a protective film cutting and rewinding device that facilitates roll changing. Background Technology

[0002] Protective film is a surface protection material widely used in electronics, building materials, automobile manufacturing, optical devices, and other fields. Its production process typically includes multiple stages such as film blowing, coating, slitting, cutting, and winding. Among these, cutting and winding are the final processes on the production line, directly affecting the packaging quality and shipping efficiency of the finished product.

[0003] Currently, common protective film cutting and winding devices typically employ a fixed winding shaft structure, meaning that a single machine is equipped with only one or two winding shafts, and the positions of these shafts are relatively fixed. In actual production, when the protective film roll on the winding shaft reaches the set diameter, the operator needs to first stop the entire production line, then manually unload the full roll, reinstall an empty roll, and finally restart the machine to continue production. This traditional method has the following significant drawbacks:

[0004] 1. Changing rolls requires shutting down the entire production line, which seriously affects production efficiency, and frequent start-ups and shutdowns also have an adverse effect on the lifespan of the equipment;

[0005] 2. Replacing the winding shaft is a rather cumbersome operation, usually requiring manual disassembly and installation, which is labor-intensive. Furthermore, the protective film is prone to wrinkles or shifting during the replacement process, affecting the winding quality.

[0006] 3. The drive connection structure of the take-up shaft is complex. After changing the roll, the drive components need to be re-aligned and reconnected, which is inconvenient to operate and has poor reliability. Summary of the Invention

[0007] The purpose of this invention is to provide a protective film cutting and winding device that facilitates roll changing, so as to solve the technical problems of existing winding devices that require machine shutdown when changing rolls, have cumbersome roll changing operations, and have inconvenient drive connections.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a protective film cutting and winding device for convenient roll changing, comprising a mounting base, wherein two rotating seats are synchronously rotatably connected to the mounting base via a first driving component, and at least two connecting seats are provided at intervals along the circumference of the rotating seats. A winding shaft for winding the protective film is rotatably connected between two opposing connecting seats on the two rotating seats. One end of the winding shaft is provided with a connecting part, which is used to detachably drive the second driving component provided on the mounting base when the winding shaft rotates with the rotating seats to the roll changing position. Through the above overall structural layout, the two rotating seats can achieve synchronous rotation under the drive of the first driving component, thereby driving multiple winding shafts to cyclically switch between the winding position and the roll changing position, providing a reliable structural basis for continuous winding operation without stopping the machine.

[0009] Preferably, the mounting base includes a first base and two vertical seats. The two vertical seats are respectively fixed to both sides of the first base, and the two rotating seats are respectively rotatably connected to the corresponding vertical seats. The first base provides a stable mounting foundation for the entire device, and the two vertical seats provide independent support for the two rotating seats, ensuring that the two rotating seats can rotate coaxially and smoothly, and that the winding shaft will not be skewed or jammed when rotating with the rotating seats.

[0010] Preferably, each of the two rotating seats has a rotating shaft fixedly connected to its opposite side. The rotating shaft is rotatably connected to the corresponding vertical seat through a first bearing. A second gear is fixed on one of the rotating shafts, which reduces the rotational frictional resistance between the rotating shaft and the vertical seat, making the rotation of the rotating seat smoother. At the same time, the second gear serves as a power input interface, which can transmit the driving force of the first drive component to the rotating shaft.

[0011] Preferably, the first drive assembly includes a first motor fixed to the vertical base, a first gear fixed on the output shaft of the first motor, and the first gear being connected to the second gear via a synchronous belt.

[0012] Preferably, there are two connecting seats, located at the top and bottom of the rotating seat respectively. First connecting blocks are provided on both sides of the top and bottom of the rotating seat, and second connecting blocks are provided on both sides of each connecting seat. A locking screw is threaded into the first connecting block, and a threaded hole adapted to the end of the locking screw is provided in the second connecting block. The thickness of the first connecting block is greater than the thickness of the second connecting block. The threaded section of the locking screw has a longer guiding distance inside the first connecting block, enabling more accurate insertion into the threaded hole of the second connecting block, thus improving the convenience and reliability of assembly.

[0013] Preferably, the second drive assembly includes a second motor fixed to the mounting base. The output shaft end of the second motor is fixed with a connector. The connecting part is a connecting groove located at the end of the take-up shaft and adapted to the connector. The engagement of the connector and the connecting groove forms a detachable plug-in transmission engagement. When the take-up shaft is in the take-up position, the connector and the connecting groove are engaged, and the power of the second motor is reliably transmitted to the take-up shaft. When the take-up shaft needs to rotate with the rotating base to switch positions, the connector and the connecting groove can be easily separated without hindering the rotation of the rotating base.

[0014] Preferably, the connecting seat is provided with a through hole, and a second bearing is fixed in the through hole. The two ends of the take-up shaft are respectively rotatably connected to the second bearings of the two connecting seats. One end of the take-up shaft extends out of the corresponding connecting seat and is provided with the connecting groove. The connecting head and the connecting groove are both cross-shaped, which can not only transmit a large torque, but also has an automatic guiding effect during the insertion of the connecting head into the connecting groove. Even if there is a small angular deviation between the two, they can be smoothly inserted and form a reliable transmission fit.

[0015] Preferably, the take-up shaft is provided with a double-sided adhesive layer for fixing the end of the protective film. The double-sided adhesive layer extends along the axial direction of the take-up shaft and has appropriate adhesiveness. When a roll of protective film begins to be wound, the operator only needs to press the starting end of the protective film onto the double-sided adhesive layer to achieve quick fixing without the need for additional tape or adhesive.

[0016] Preferably, it also includes a second base, the top of which is connected to the bottom of the first base via a telescopic cylinder. The second base is fixedly installed on the workshop floor. The cylinder body of the telescopic cylinder is fixed to the second base, and the piston rod of the telescopic cylinder is connected to the bottom of the first base. By extending or retracting the telescopic cylinder, the entire first base and above components can be driven to move up and down, thereby flexibly adjusting the axial height of the winding shaft. This allows the winding shaft to be precisely matched with the discharge port height of the upstream cutting equipment, avoiding the problem of the protective film sagging or being overstretched during the conveying process due to height mismatch.

[0017] Preferably, the first motor, the second motor, and the telescopic cylinder are all electrically connected to an external controller, which is a PLC controller.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting two synchronously rotating seats on the mounting base and setting at least two connecting seats along the circumference on the rotating seats, multiple take-up shafts can switch positions as the rotating seats rotate. When one take-up shaft finishes winding, the rotating seats can switch another empty take-up shaft to the winding position, realizing roll changing without stopping the machine and improving production efficiency.

[0020] 2. The winding shaft can be detachably installed on the rotating seat via a connecting seat. The connecting seat is connected by a first connecting block, a second connecting block and a locking screw, which not only ensures the stability of the connection, but also facilitates quick disassembly and assembly. The winding operation is simple and quick, reducing the intensity of manual labor.

[0021] 3. By setting a connecting groove at the end of the take-up shaft and a connector at the end of the output shaft of the second motor, when the take-up shaft rotates with the rotating seat to the roll changing station, the connecting groove and the connector are aligned to form a detachable transmission connection, and the drive connection structure is simple and reliable.

[0022] 4. By setting a second base and a telescopic cylinder, the height of the entire device can be adjusted according to the actual needs of the production line, making it more adaptable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the connector structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the rotating seat structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the rotating seat and the connecting seat of the present invention;

[0027] Figure 5 This is a schematic diagram of the winding shaft structure of the present invention.

[0028] In the attached drawings, the following are the reference numerals: 1. Mounting base; 2. Rotating base; 3. Connecting base; 4. Rewinding shaft; 5. First base; 6. Vertical base; 7. Rotating shaft; 8. First bearing; 9. Second gear; 10. First motor; 11. First gear; 12. Synchronous belt; 13. First connecting block; 14. Second connecting block; 15. Locking screw; 16. Screw hole; 17. Second motor; 18. Connector; 19. Connecting groove; 20. Second bearing; 21. Double-sided adhesive layer; 22. Second base; 23. Telescopic cylinder. Detailed Implementation

[0029] The structure of this convenient protective film cutting and winding device will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Please see Figures 1-5The present invention provides a technical solution: a protective film cutting and winding device for easy roll changing, including a mounting base 1, in which two rotating seats 2 are synchronously rotatably connected via a first drive component. At least two connecting seats 3 are provided on the rotating seats 2 at intervals along their circumference. A winding shaft 4 for winding the protective film is rotatably connected between the two opposite connecting seats 3 on the two rotating seats 2. One end of the winding shaft 4 is provided with a connecting part, which is used to detachably drive the winding shaft 4 to the second drive component provided on the mounting base 1 when the winding shaft 4 rotates with the rotating seats 2 to the roll changing position.

[0035] After the take-up shaft 4 at the take-up station finishes taking up its winding, the first drive component drives the two rotating seats 2 to rotate synchronously, switching another empty take-up shaft 4 to the take-up station. At the same time, the full take-up shaft 4 is switched to the roll-changing station. At the roll-changing station, the connecting part at the end of the full take-up shaft 4 is disengaged from the second drive component. The operator can unload the full take-up shaft 4 and replace it with a new empty take-up shaft. The whole process does not require stopping the machine, realizing continuous production of the take-up stage after the protective film is cut, and improving the output efficiency of the entire production line.

[0036] Mounting base 1 includes a first base 5 and two vertical seats 6. The two vertical seats 6 are fixed on both sides of the first base 5 respectively. The two rotating seats 2 are rotatably connected to the corresponding vertical seats 6. The vertical seats 6 provide stable support for the rotating seats 2, so that the two rotating seats 2 can achieve synchronous and smooth rotation under the drive of the first drive component, avoiding the impact of sway or shaking on the roll changing positioning accuracy.

[0037] Two rotating seats 2 are fixedly connected to rotating shafts 7 on opposite sides. The rotating shafts 7 are rotatably connected to the corresponding vertical seats 6 through the first bearing 8. A second gear 9 is fixed on one of the rotating shafts 7.

[0038] The first drive assembly includes a first motor 10 fixed on the vertical base 6. A first gear 11 is fixed on the output shaft of the first motor 10. The first gear 11 is connected to the second gear 9 via a synchronous belt 12. After the first motor 10 is started, it drives one of the rotating shafts 7 to rotate through the transmission of the first gear 11, the synchronous belt 12, and the second gear 9, thereby driving the two rotating seats 2 to rotate synchronously.

[0039] There are two connecting seats 3, located at the top and bottom of the rotating seat 2 respectively. When the rotating seat 2 rotates 180°, the positions of the connecting seats 3 at the top and bottom of the rotating seat 2 are interchanged, thereby realizing the switching between the winding station and the winding station. The top and bottom sides of the rotating seat 2 are provided with first connecting blocks 13, and the sides of the connecting seats 3 are provided with second connecting blocks 14 respectively. The first connecting block 13 is threaded with a locking screw 15, and the second connecting block 14 is provided with a screw hole 16 that matches the end of the locking screw 15. Since the thickness of the first connecting block 13 is greater than the thickness of the second connecting block 14, the locking screw 15 passes through the first connecting block 13 and extends into the screw hole 16 of the second connecting block 14, ensuring sufficient thread engagement length and reliable connection. Disassembly is very convenient; simply unscrew the locking screw 15 in the opposite direction.

[0040] The second drive assembly includes a second motor 17 fixed on the mounting base 1. A connector 18 is fixed to the end of the output shaft of the second motor 17. The connecting part is a connecting groove 19 located at the end of the take-up shaft 4 and adapted to the connector 18. When the take-up shaft 4 rotates with the rotating base 2 to the winding position, the connecting groove 19 at the end of the take-up shaft 4 is exactly opposite to the connector 18 at the end of the output shaft of the second motor 17. In the winding operation state, the connector 18 is inserted into the connecting groove 19, and the second motor 17 drives the take-up shaft 4 to rotate for winding. When it is necessary to switch the take-up shaft, the connector 18 is withdrawn from the connecting groove 19, and the take-up shaft 4 can rotate away with the rotating base 2.

[0041] The connecting seat 3 is provided with a through hole, and a second bearing 20 is fixed in the through hole. The two ends of the take-up shaft 4 are respectively rotatably connected to the second bearings 20 of the two connecting seats 3. One end of the take-up shaft 4 extends out of the corresponding connecting seat 3 and is provided with a connecting groove 19. Both the connector 18 and the connecting groove 19 are cross-shaped. The cross-shaped connection structure transmits large torque and is not easy to slip. Even if there is a slight angular deviation between the connector 18 and the connecting groove 19, it can be smoothly inserted and work normally.

[0042] The take-up shaft 4 is provided with a double-sided adhesive layer 21 for fixing the end of the protective film. When the take-up begins, the end of the protective film can be quickly and firmly attached to the take-up shaft 4 through the double-sided adhesive layer 21. When the take-up is completed, the full roll of protective film can be easily removed from the take-up shaft 4. The double-sided adhesive layer 21 is replaceable.

[0043] It also includes a second base 22, the top of which is connected to the bottom of the first base 5 via a telescopic cylinder 23. The height of the entire device is adjusted by telescopic cylinder 23, so that the height of the winding shaft matches the discharge port height of the upstream cutting equipment. No additional modifications to the production line are required, which improves the versatility and adaptability of the equipment.

[0044] The first motor 10, the second motor 17, and the telescopic cylinder 23 are all electrically connected to an external controller, which is a PLC controller. Through preset programs, the controller can automatically control actions such as winding, changing rolls, and height adjustment, thereby further improving the level of production automation.

[0045] In the initial state, the take-up shaft 4 located at the top of the rotating seat 2 is in the take-up position. The connector 18 of the second motor 17 is inserted into the connecting groove at the end of the take-up shaft 4. The second motor 17 is started, driving the take-up shaft 4 to rotate, and continuously winding the cut protective film onto the take-up shaft 4. Before the take-up begins, the starting end of the protective film is pressed and fixed onto the double-sided adhesive layer 21 on the surface of the take-up shaft 4 by the operator. At the same time, another take-up shaft 4 located at the bottom of the rotating seat 2 is in standby mode. The take-up shaft 4 in standby mode has a new double-sided adhesive layer 21 pre-attached to it, waiting for the next roll change.

[0046] When the protective film roll on the take-up shaft 4 reaches the set diameter, the second motor 17 stops rotating, disengages the locking screw 15 from the screw holes 16 of the first connecting block 13 and the second connecting block 14, and then removes the connector 18 from the connecting groove 19. Subsequently, the first motor 10 starts, drives the rotating shaft 7 to rotate through the first gear 11, the synchronous belt 12, and the second gear 9, thereby driving the two rotating seats 2 to rotate synchronously by 180°. At this time, the empty take-up shaft 4 at the bottom rotates to the top take-up position, and the full take-up shaft 4 at the top rotates to the bottom change-up position. The connecting groove 19 at the end of the empty take-up shaft 4 is aligned and engaged with the connector 18 of the second motor 17 to complete the transmission connection. Then, the locking screw 15 passes through the screw holes 16 of the first connecting block 13 and the second connecting block 14 in sequence, thereby fixing the rotating seat 2 and the connecting seat 3. The second motor 17 restarts, and the new empty take-up shaft 4 begins to wind.

[0047] Meanwhile, the full-wound take-up shaft 4, which was originally located at the top, has been rotated to the bottom rewinding station. At this station, the operator loosens the locking screw 15 to disengage the connecting seat 3 from the rotating seat 2. Then, the entire take-up shaft 4, along with the protective film roll, is removed from between the two connecting seats 3. Next, the new empty take-up shaft 4 is installed at the corresponding position at the bottom of the rotating seat 2 through the connecting seats 3 at both ends. The locking screw 15 is tightened to fix it, and the end of the protective film is pre-attached to the double-sided adhesive layer 21, waiting for the next rewinding.

[0048] Through the above cycle, continuous production without stopping the machine is achieved for cutting and rewinding the protective film. The roll changing process is fast and simple, and the drive connection is completed automatically without manual intervention.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A protective film cutting and rewinding device for easy roll changing, characterized in that, The device includes a mounting base (1), in which two rotating seats (2) are synchronously rotatably connected via a first drive assembly. At least two connecting seats (3) are provided on the rotating seats (2) at circumferential intervals. A winding shaft (4) for winding up the protective film is rotatably connected between the two opposite connecting seats (3) on the two rotating seats (2). One end of the winding shaft (4) is provided with a connecting part, which is used to detachably drive the second drive assembly provided on the mounting base (1) when the winding shaft (4) rotates with the rotating seats (2) to the roll changing position.

2. The protective film cutting and rewinding device for convenient roll changing according to claim 1, characterized in that: The mounting base (1) includes a first base (5) and two vertical seats (6). The two vertical seats (6) are respectively fixed on both sides of the first base (5), and the two rotating seats (2) are respectively rotatably connected to the corresponding vertical seats (6).

3. The protective film cutting and rewinding device for convenient roll changing according to claim 2, characterized in that: Two rotating seats (2) are fixedly connected to rotating shafts (7) on opposite sides. The rotating shafts (7) are rotatably connected to the corresponding vertical seats (6) through first bearings (8). A second gear (9) is fixed on one of the rotating shafts (7).

4. The protective film cutting and rewinding device for convenient roll changing according to claim 3, characterized in that: The first drive assembly includes a first motor (10) fixed on the vertical base (6), and a first gear (11) is fixed on the output shaft of the first motor (10). The first gear (11) is connected to the second gear (9) via a synchronous belt (12).

5. A protective film cutting and rewinding device for easy roll changing according to claim 4, characterized in that: Two connecting seats (3) are provided, and the two connecting seats (3) are located at the top and bottom of the rotating seat (2) respectively. The rotating seat (2) has a first connecting block (13) on both sides of the top and the bottom. The connecting seats (3) have a second connecting block (14) on both sides. The first connecting block (13) is threaded with a locking screw (15). The second connecting block (14) is provided with a screw hole (16) that matches the end of the locking screw (15). The thickness of the first connecting block (13) is greater than the thickness of the second connecting block (14).

6. The protective film cutting and rewinding device for convenient roll changing according to claim 1, characterized in that: The second drive assembly includes a second motor (17) fixed on the mounting base (1), and a connector (18) is fixed to the end of the output shaft of the second motor (17). The connector is a connecting groove (19) located at the end of the take-up shaft (4) and adapted to the connector (18).

7. A protective film cutting and rewinding device for easy roll changing according to claim 6, characterized in that: The connecting seat (3) is provided with a through hole, and a second bearing (20) is fixed in the through hole. The two ends of the take-up shaft (4) are respectively rotatably connected to the second bearings (20) of the two connecting seats (3). One end of the take-up shaft (4) extends out of the corresponding connecting seat (3) and is provided with the connecting groove (19). The connecting head (18) and the connecting groove (19) are both cross-shaped.

8. A protective film cutting and rewinding device for easy roll changing according to claim 7, characterized in that: The take-up shaft (4) is provided with a double-sided adhesive layer (21) for fixing the end of the protective film.

9. A protective film cutting and rewinding device for easy roll changing according to claim 8, characterized in that: It also includes a second base (22), the top of which is connected to the bottom of the first base (5) via a telescopic cylinder (23).

10. A protective film cutting and rewinding device for convenient roll changing according to claim 9, characterized in that: The first motor (10), the second motor (17), and the telescopic cylinder (23) are all electrically connected to an external controller.

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