A rewinding machine with a double punching knife device

Abstract

This utility model discloses a rewinding machine with a double-punching knife device, including a frame. From front to back, the frame is equipped with an embossing device, a first punching device, a second punching device, and a winding device. The principle of this utility model is scientific. Based on existing rewinding machines, it mainly adds one punching device. The two punching devices are arranged front and back, and the punching knives of the two devices are different. One set is spare, and the other is in operation. This eliminates the need to disassemble and replace the punching knives when rewinding different paper products, improving work efficiency, reducing labor intensity, and ensuring the quality of the rewound paper products.

Description

Technical Field

[0001] This utility model belongs to the field of toilet paper rewinding production technology, specifically relating to a rewinding machine with a double punching knife device. Background Technology

[0002] Standard toilet paper rewinding machines have only one perforation blade device. This device uses upper and lower perforation blade rollers to clearly punch out broken lines, resulting in small, elongated holes perpendicular to the unfolding direction of the finished paper roll. During production, users need to replace the perforating blades and perforating teeth on the perforation blade device depending on the required paper roll product. This not only wastes manpower and time, but also means that the replaced blades and teeth are essentially unusable after reinstallation, leading to significant waste. Utility Model Content

[0003] In order to solve the above-mentioned technical problems in the prior art, the present invention provides a rewinding machine with a double (two) punching knife device, and the two double punching knife devices can be used alternately or simultaneously.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a rewinding machine with a double punching knife device, comprising a frame, wherein an embossing device, a first punching device, a second punching device and a winding device are arranged sequentially from front to back on the frame;

[0005] Both the first and second punching devices include an upper rotating roller and a lower fixed roller arranged horizontally in the left-right direction. The left and right ends of the central shaft of the upper rotating roller are rotatably connected to the frame. The frame is provided with two lifting drive mechanisms symmetrically arranged on the left and right. The left and right ends of the central shaft of the lower fixed roller are fixed on the corresponding lifting drive mechanisms. The frame is provided with a punching motor for driving the upper rotating roller. The outer circle of the upper rotating roller is uniformly provided with a number of punching face knives in the circumferential direction. The top of the lower fixed roller is provided with a punching tooth knife.

[0006] The lifting drive mechanism includes a lifting cylinder, a rotating arm, and a push rod. The rear end of the rotating arm is hinged to the frame, the upper end of the push rod is hinged to the front end of the rotating arm, the lifting cylinder is vertically arranged, and the lower end of the lifting cylinder is hinged to the frame. The lower end of the push rod is coaxially provided with a threaded hole, and the piston rod at the upper end of the lifting cylinder extends coaxially into and is threaded into the threaded hole. The end of the central shaft of the lower fixed roller is fixedly connected to the middle of the rotating arm on the same side.

[0007] The embossing device includes an embossing roller, an embossing roller, and a paper feeding roller arranged horizontally in the left-right direction. At least one embossing roller is provided. The embossing roller is located below the embossing roller and is tangent to it. The paper feeding roller is located in front of the embossing roller. The left and right ends of the central shafts of the embossing roller and the embossing roller are rotatably connected to the frame. The left and right ends of the central shaft of the paper feeding roller are respectively connected to a first front-back position adjustment mechanism. The frame is provided with a scraper plate that contacts the upper outer circle of the embossing roller.

[0008] The first front-to-back position adjustment mechanism includes a first adjustment cylinder and a first lever. The rear end of the first adjustment cylinder is hinged to the frame. The front end of the piston rod of the first adjustment cylinder is coaxially connected to a first push-pull rod. The front end of the first push-pull rod is hinged to the lower end of the first lever. The middle part of the first lever is hinged to the frame through a first fulcrum hinge. The first lever is located in front of the paper feeding fabric roller. The central shaft end of the paper feeding fabric roller is provided with a first bearing seat. The front end of the first bearing seat is fixedly connected to the rear side of the upper part of the first lever.

[0009] The winding device includes a winding pressure roller, a winding pattern roller, a winding smooth roller, and a winding felt roller arranged horizontally in the left-right direction. The winding pressure roller is located above the winding pattern roller. A rotating rod is rotatably provided at both ends of the central axis of the winding pressure roller. The front end of the rotating rod is rotatably connected to the frame, and the rear end of the rotating rod is connected to a winding cylinder for driving the rotating rod to rotate. The winding pattern roller, the winding smooth roller, and the winding felt roller are arranged in sequence from back to front. A second front-back position adjustment mechanism is connected to both ends of the central axis of the paper feeding felt roller.

[0010] The second front and rear position adjustment mechanism includes a second adjusting cylinder and a second lever. The front end of the second adjusting cylinder is hinged to the frame. The rear end of the piston rod of the second adjusting cylinder is coaxially connected to a second push-pull rod. The rear end of the second push-pull rod is hinged to the lower end of the second lever. The middle part of the second lever is hinged to the frame through a second fulcrum hinge. The second lever is located in front of the take-up fabric roller. The central shaft end of the take-up fabric roller is provided with a second bearing seat. The front end of the second bearing seat is fixedly connected to the upper rear side of the second lever.

[0011] By adopting the above technical solution, this utility model has the following beneficial effects:

[0012] 1) A first punching device and a second punching device are installed at intervals along the front and back of the frame. Different punching face blades and punching teeth are mounted on the first and second punching devices. When the first punching device is needed for punching operations, the second punching device is on standby (not in operation), and vice versa. Alternatively, three or more punching devices with different blades can be installed at intervals along the front and back direction. This eliminates the need to change blades during paper roll production, improving production efficiency, avoiding disassembly and replacement of blades, ensuring punching quality, and extending blade life.

[0013] 2) The upper rotating rollers of the first and second punching devices remain stationary. When the multiple punching blades in the upper rotating rollers rotate to their lowest position and contact the punching teeth, they punch holes in the paper being fed from front to back. The lower fixed rollers of the first and second punching devices do not rotate, and the punching teeth remain stationary in the working position. When the lower fixed roller is in standby (not working), the piston rods of the lifting cylinders on both sides retract synchronously downwards, driving the rotating arm and the lower fixed roller to rotate downwards around the hinge point at the rear end of the rotating arm, thus lowering the position of the lower fixed roller. When the lower fixed roller moves from the standby position to the working position, the piston rod of the lifting cylinder extends, driving the lower fixed roller to move upwards to the working position.

[0014] 3) The paper feeding fabric roller of the embossing device moves back and forth by the extension and retraction of the first adjusting cylinder. The piston rod of the first adjusting cylinder extends and drives the paper feeding fabric roller to move backward through the first lever, so that the paper surface can be tightly attached to the embossing roller. The embossing roller tangent to the embossing roller embosses the paper surface that is conveyed backward around the embossing roller. The paper scraps adhering to the surface of the embossing roller are scraped off by the scraper plate.

[0015] 4) The take-up fabric roller of the take-up device moves back and forth by extending and retracting the second adjusting cylinder. The piston rod of the second adjusting cylinder shortens and drives the take-up fabric roller to move backward through the second lever. This allows the perforated paper surface to be tightly adhered to the take-up smooth roller. The paper surface is taken up in the triangular area between the take-up pattern roller, the take-up smooth roller and the take-up pressure roller. During the take-up process, the compaction of the paper roll is adjusted in a timely manner by the take-up cylinder.

[0016] In summary, the principle of this utility model is scientific. Based on the existing rewinding machine, it mainly adds a punching device. The two punching devices are arranged one in front of the other, and the punching blades of the two punching devices are different. One is spare and the other is working. In this way, when rewinding different paper products, there is no need to disassemble and replace the punching blades, which improves work efficiency, reduces the labor intensity of workers, and ensures the quality of the paper products after rewinding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first punching device in operation and the second punching device in standby state in this utility model.

[0018] Figure 2 This is a schematic diagram showing the first punching device in standby mode and the second punching device in working mode in this utility model.

[0019] Figure 3 for Figure 1 Enlarged view of the first drilling device in the middle;

[0020] Figure 4 for Figure 1 Enlarged view of the second punching device;

[0021] Figure 5 for Figure 1 Enlarged view of the embossing device;

[0022] Figure 6 for Figure 1 Enlarged view of the winding device;

[0023] Figure 7 This is a top view of the upper rotating rollers of the first and second punching devices in this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figures 1-7 As shown, a rewinding machine with a double punching knife device includes a frame 1, on which an embossing device 2, a first punching device 3, a second punching device 4 and a winding device 5 are arranged sequentially from front to back.

[0026] Both the first punching device 3 and the second punching device 4 include an upper rotating roller 6 and a lower fixed roller 7 arranged horizontally in the left-right direction. The left and right ends of the central shaft of the upper rotating roller 6 are rotatably connected to the frame 1. The frame 1 is provided with two lifting drive mechanisms symmetrically arranged on the left and right sides. The left and right ends of the central shaft of the lower fixed roller 7 are fixed on the corresponding lifting drive mechanisms. The frame 1 is provided with a punching motor for driving the upper rotating roller 6. The outer circle of the upper rotating roller 6 is uniformly provided with a number of punching face knives 8 in the circumferential direction. The top of the lower fixed roller 7 is provided with a punching tooth knife 9.

[0027] The lifting drive mechanism includes a lifting cylinder 10, a rotating arm 11, and a push rod 12. The rear end of the rotating arm 11 is hinged to the frame 1. The upper end of the push rod 12 is hinged to the front end of the rotating arm 11. The lifting cylinder 10 is vertically arranged, and the lower end of the lifting cylinder 10 is hinged to the frame 1. The lower end of the push rod 12 is coaxially provided with a threaded hole. The piston rod at the upper end of the lifting cylinder 10 extends coaxially into and is threaded into the threaded hole. The central shaft end of the lower fixed roller 7 is fixedly connected to the middle of the rotating arm 11 on the same side.

[0028] The embossing device 2 includes an embossing roller 13, an embossing roller 14, and a paper feeding fabric roller 15 arranged horizontally in the left-right direction. At least one embossing roller 14 is provided. The embossing roller 14 is located below the embossing roller 13 and is tangent to the embossing roller 13. The paper feeding fabric roller 15 is located in front of the embossing roller 13. The left and right ends of the central axis of the embossing roller and the embossing roller 14 are rotatably connected to the frame 1. The left and right ends of the central axis of the paper feeding fabric roller 15 are respectively connected to a first front-back position adjustment mechanism. The frame 1 is provided with a scraper plate 16 that contacts the upper outer circle of the embossing roller 13.

[0029] The first front-to-back position adjustment mechanism includes a first adjusting cylinder 17 and a first lever 18. The rear end of the first adjusting cylinder 17 is hinged to the frame 1. The piston rod of the first adjusting cylinder 17 is coaxially connected to a first push-pull rod 19. The front end of the first push-pull rod 19 is hinged to the lower end of the first lever 18. The middle part of the first lever 18 is hinged to the frame 1 through a first fulcrum hinge 20. The first lever 18 is located in front of the paper feeding fabric roller 15. The central shaft end of the paper feeding fabric roller 15 is provided with a first bearing seat 21. The front end of the first bearing seat 21 is fixedly connected to the upper rear side of the first lever 18.

[0030] The winding device 5 includes a winding pressure roller 22, a winding pattern roller 23, a winding smooth roller 24, and a winding felt roller 25 arranged horizontally in the left-right direction. The winding pressure roller 22 is located above the winding pattern roller 23. A rotating rod 26 is rotatably provided at both ends of the central axis of the winding pressure roller 22. The front end of the rotating rod 26 is rotatably connected to the frame 1, and the rear end of the rotating rod 26 is connected to a winding cylinder 27 for driving the rotating rod 26 to rotate. The winding pattern roller 23, the winding smooth roller 24, and the winding felt roller 25 are arranged sequentially from back to front. A second front-back position adjustment mechanism is connected at both ends of the central axis of the paper feeding felt roller 15.

[0031] The second front and rear position adjustment mechanism includes a second adjusting cylinder 28 and a second lever 29. The front end of the second adjusting cylinder 28 is hinged to the frame 1. The rear end of the piston rod of the second adjusting cylinder 28 is coaxially connected to a second push-pull rod 30. The rear end of the second push-pull rod 30 is hinged to the lower end of the second lever 29. The middle part of the second lever 29 is hinged to the frame 1 through a second fulcrum hinge 31. The second lever 29 is located in front of the take-up fabric roller 25. The central shaft end of the take-up fabric roller 25 is provided with a second bearing seat 32. The front end of the second bearing seat 32 is fixedly connected to the upper rear side of the second lever 29.

[0032] The working principle and beneficial effects of this utility model are as follows:

[0033] 1) A first punching device 3 and a second punching device 4 are arranged at intervals on the frame 1. Different punching face blades 8 and punching tooth blades 9 are installed on the first punching device 3 and the second punching device 4. When the first punching device 3 is needed to perform punching operations, the second punching device 4 is on standby (not working), and when the second punching device 4 is needed to perform punching operations, the first punching device 3 is on standby (not working). Of course, more than three punching devices with different blades can also be arranged at intervals along the front-back direction. During the production of paper roll 33, the blades do not need to be changed, which improves production efficiency, avoids disassembly and replacement of blades, ensures punching quality, and extends the service life of the blades.

[0034] 2) The overall position of the upper roller 6 of the first punching device 3 and the second punching device 4 remains unchanged. When the multiple punching blades 8 in the upper roller 6 rotate to the bottom and contact the punching tooth blades 9, they impact the paper surface being conveyed from front to back. Figure 1 and Figure 2 (As indicated by the arrow in the image) Drilling is performed. The lower fixed roller 7 of the first drilling device 3 and the second drilling device 4 does not rotate, and the drilling tooth 9 remains stationary in the working position. When the lower fixed roller 7 is in standby (not working), the piston rods of the lifting cylinders 10 on both sides retract downwards synchronously, driving the rotating arm 11 and the lower fixed roller 7 to rotate downwards around the hinge point at the rear end of the rotating arm 11 through the push rod 12, and the position of the lower fixed roller 7 moves downwards. When the lower fixed roller 7 changes from the standby position to the working position, the piston rod of the lifting cylinder 10 extends, driving the lower fixed roller 7 to move upwards to the working position.

[0035] 3) The paper feeding fabric roller 15 of the embossing device 2 moves back and forth by the extension and retraction of the first adjusting cylinder 17. The piston rod of the first adjusting cylinder 17 extends and drives the paper feeding fabric roller 15 to move backward through the first lever 18, so that the paper surface can be tightly attached to the embossing roller 13. The embossing roller 14, which is tangent to the embossing roller 13, embosses the paper surface that is conveyed backward around the embossing roller 13. The paper scraps adhering to the surface of the embossing roller 13 are scraped off by the scraper plate 16.

[0036] 4) The take-up fabric roller 25 of the take-up device 5 moves back and forth by the extension and retraction of the second adjusting cylinder 28. The piston rod of the second adjusting cylinder 28 is shortened, and the take-up fabric roller 25 is driven to move backward through the second lever 29. The perforated paper surface can be tightly attached to the take-up smooth roller 24. The paper surface is taken up in the triangular area between the take-up pattern roller 23, the take-up smooth roller 24 and the take-up pressure roller 22. During the take-up process, the compaction of the paper roll 33 is adjusted in time by the take-up cylinder 27.

[0037] It should be emphasized that the components in this utility model, such as the upper rotating roller 6, the perforating blade 8, the lower fixed roller 7, the perforating tooth blade 9, and the scraper 16, are all existing mature technologies, and their specific structures and working principles will not be described in detail. The embossing device 2 and the winding device 5 are consistent with those on existing rewinding machines and do not require modification.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rewinder having a double slitting knife arrangement, comprising a frame, characterised in that: The frame is equipped with an embossing device, a first punching device, a second punching device, and a winding device, arranged sequentially from front to back. Both the first and second punching devices include an upper rotating roller and a lower fixed roller arranged horizontally in the left-right direction. The left and right ends of the central shaft of the upper rotating roller are rotatably connected to the frame. The frame is provided with two lifting drive mechanisms symmetrically arranged on the left and right. The left and right ends of the central shaft of the lower fixed roller are fixed on the corresponding lifting drive mechanisms. The frame is provided with a punching motor for driving the upper rotating roller. The outer circle of the upper rotating roller is uniformly provided with a number of punching face knives in the circumferential direction. The top of the lower fixed roller is provided with a punching tooth knife.

2. A rewinder with double perforating device according to claim 1, characterized in that: The lifting drive mechanism includes a lifting cylinder, a rotating arm, and a push rod. The rear end of the rotating arm is hinged to the frame, the upper end of the push rod is hinged to the front end of the rotating arm, the lifting cylinder is vertically arranged, and the lower end of the lifting cylinder is hinged to the frame. The lower end of the push rod is coaxially provided with a threaded hole, and the piston rod at the upper end of the lifting cylinder extends coaxially into and is threaded into the threaded hole. The end of the central shaft of the lower fixed roller is fixedly connected to the middle of the rotating arm on the same side.

3. The rewinder having a double perforating knife device according to claim 1, characterized in that: The embossing device includes an embossing roller, an embossing roller, and a paper feeding roller arranged horizontally in the left-right direction. At least one embossing roller is provided. The embossing roller is located below the embossing roller and is tangent to it. The paper feeding roller is located in front of the embossing roller. The left and right ends of the central shafts of the embossing roller and the embossing roller are rotatably connected to the frame. The left and right ends of the central shaft of the paper feeding roller are respectively connected to a first front-back position adjustment mechanism. The frame is provided with a scraper plate that contacts the upper outer circle of the embossing roller.

4. A rewinding machine with a double-punching knife device according to claim 3, characterized in that: The first front-to-back position adjustment mechanism includes a first adjustment cylinder and a first lever. The rear end of the first adjustment cylinder is hinged to the frame. The front end of the piston rod of the first adjustment cylinder is coaxially connected to a first push-pull rod. The front end of the first push-pull rod is hinged to the lower end of the first lever. The middle part of the first lever is hinged to the frame through a first fulcrum hinge. The first lever is located in front of the paper feeding fabric roller. The central shaft end of the paper feeding fabric roller is provided with a first bearing seat. The front end of the first bearing seat is fixedly connected to the rear side of the upper part of the first lever.

5. The rewinder having a double perforating knife device according to claim 1, characterized in that: The winding device includes a winding pressure roller, a winding pattern roller, a winding smooth roller, and a winding felt roller arranged horizontally in the left-right direction. The winding pressure roller is located above the winding pattern roller. A rotating rod is rotatably provided at both ends of the central axis of the winding pressure roller. The front end of the rotating rod is rotatably connected to the frame, and the rear end of the rotating rod is connected to a winding cylinder for driving the rotating rod to rotate. The winding pattern roller, the winding smooth roller, and the winding felt roller are arranged in sequence from back to front. A second front-back position adjustment mechanism is connected to both ends of the central axis of the paper feeding felt roller.

6. A rewinding machine with double perforating device according to claim 5, characterized in that: The second front and rear position adjustment mechanism includes a second adjusting cylinder and a second lever. The front end of the second adjusting cylinder is hinged to the frame. The rear end of the piston rod of the second adjusting cylinder is coaxially connected to a second push-pull rod. The rear end of the second push-pull rod is hinged to the lower end of the second lever. The middle part of the second lever is hinged to the frame through a second fulcrum hinge. The second lever is located in front of the take-up fabric roller. The central shaft end of the take-up fabric roller is provided with a second bearing seat. The front end of the second bearing seat is fixedly connected to the upper rear side of the second lever.

Images