Dynamic stress balance rewinding machine for medical adhesive tape

Abstract

The invention relates to the technical field of rewinding machines, in particular to a medical adhesive tape dynamic stress balance rewinding machine which comprises a rack, a first rewinding shaft and a second rewinding shaft are installed on a double-station driving disc, a cutting frame is installed in the rack, the cutting frame extends to the position between the first rewinding shaft and the second rewinding shaft in the length direction, and the first rewinding shaft and the second rewinding shaft are arranged on the rack. A screw rod and a cutting seat are rotationally connected in the cutting frame, a cutting knife is mounted on the cutting seat, a dragging and lifting balance roller is rotationally connected to the top end of the electric cylinder driving frame, and the driving assembly comprises a first transmission combination in transmission on the lifting frame and further comprises a second transmission combination in transmission on the screw rod. And the problems of manual balance and manual cutting are solved. The produced medical adhesive tape roll reaches extremely high standards in the aspects of appearance, compactness, use performance and the like, and the strict quality requirements of the medical industry are met.

Description

Technical Field

[0001] The present invention relates to the technical field of rewinding machines, and particularly to a dynamic stress balance rewinding machine for medical tapes. Background Art

[0002] A tape rewinding machine is a special equipment for the production of adhesive tapes and plays a key role in the tape production process. A tape rewinding machine is a mechanical device used to rewind a large roll of tape into small rolls according to specific requirements. Generally, it can be divided into a simple rewinding machine, a deviation rectifying rewinding machine, a peeling rewinding machine, a turning double-shaft rewinding machine, etc. Taking a tape rewinding machine as an example, inside the main body of the rewinding machine, a feeding shaft, a first tightening shaft, a second tightening shaft, a conveying shaft (conveying shaft or roller combination), a first winding shaft and a second winding shaft (or the first rewinding shaft and the second rewinding shaft) are sequentially arranged. One ends of the first winding shaft and the second winding shaft are commonly installed on a driving disk to form a two-station rewinding.

[0003] After the tape is rewound, it needs to be cut manually. The contact with the blade is likely to cause the risk of scratching the operator. The ordinary rewinding machine lacks a dynamic stress compensation mechanism and has poor adaptability to elastic tapes; the cutting mechanism is mostly independently driven, and there are serious deficiencies in the balance and cutting synchronization, resulting in low efficiency. Summary of the Invention

[0004] To solve the above problems, the present invention provides a dynamic stress balance rewinding machine for medical tapes, which includes a frame. Inside the frame, a conveying roller combination is provided. On the discharging side of the conveying roller combination, a two-station driving disk installed on one side inside the frame is provided. A first rewinding shaft and a second rewinding shaft are installed on the two-station driving disk. Inside the frame, a cutting frame is installed. The cutting frame extends along the length direction between the first rewinding shaft and the second rewinding shaft. A screw rod is rotatably connected inside the cutting frame. A reciprocating groove is formed inside the cutting frame. A cutting seat driven on the screw rod is provided inside the reciprocating groove. A cutting knife extending between the first rewinding shaft and the second rewinding shaft is installed on the cutting seat. An electric cylinder driving frame is provided inside the frame. A lifting balance roller is rotatably connected to the top end of the electric cylinder driving frame. A lifting frame and a driving assembly are provided inside the frame. A pressing balance roller is rotatably connected to the end of the lifting frame. The driving assembly includes a first transmission combination driven on the lifting frame and also includes a second transmission combination driven on the screw rod.

[0005] As a further preferred option, at least one conveying roller on the discharging side of the conveying roller combination is close to the two-station driving disk to convey the tape to the first rewinding shaft or the second rewinding shaft.

[0006] As a further preferred option, guide rail structures are installed on the left and right inner walls of the frame. The two ends of the electric cylinder driving frame are slidably matched with the left and right guide rail structures. The lifting balance roller is installed on the top end of the electric cylinder driving frame through two bearing seats. When the first rewinding shaft and the second rewinding shaft rotate to the front side in sequence, they reach above the lifting balance roller.

[0007] As a further preferred embodiment, a horizontal seat is installed at the front bottom of the frame, a vertically upward electric cylinder is installed on the horizontal seat, and the electric cylinder drive frame is installed on the top of the electric cylinder.

[0008] As a further preferred embodiment, the cutting frame is positioned at the rear, the bottom of the reciprocating groove passes through the bottom surface of the cutting frame, and the bottom end of the cutting blade passes through the bottom surface of the cutting frame through the reciprocating groove.

[0009] As a further preferred embodiment, the first transmission assembly includes a second guide rail installed on the right end of the frame, the right end of the lifting frame slides on the second guide rail, the first transmission assembly also includes a first gear transferred to the right end inside the frame, including a first rack connected to the electric cylinder driving frame, and also including a second rack installed on the lifting frame, the first gear is meshed between the first rack and the second rack, the second transmission assembly includes a second gear transferred on the right end inside the frame, and also includes a third gear installed on the right end of the screw, the second gear is away from above the first gear, the third gear meshes with the second gear, the top end of the first rack is provided with an extension part, the extension end extends upward and meshes with the second gear, when the electric cylinder driving frame rises, the first rack meshes with the first gear and rotates counterclockwise, and the first gear meshes with the second rack to descend, and the lifting frame is driven to descend by the second rack, and the first rack meshes with the second gear and rotates counterclockwise, and the second gear meshes with the third gear to rotate clockwise, and the screw is driven by the third gear to rotate clockwise, and the cutting seat is driven by the screw, and the cutting knife is driven by the cutting seat to move linearly.

[0010] As a further preference, a distribution box is provided at the right end of the frame, a driving device is installed in the distribution box, and an action end of the driving device enters the frame and corresponds to the vicinity of the free ends of the first rewinding shaft and the second rewinding shaft.

[0011] As a further preference, the end of the lifting frame is provided with a bent portion bent forward, and the downward pressure balancing roller is installed on the bent portion.

[0012] The beneficial effects of the present invention compared to the prior art are:

[0013] 1. An electric cylinder drive frame is set in the frame, and the first transmission combination and the second transmission combination are set relative to the lifting mode of the electric cylinder drive frame. At the same time, a cutting knife is set relative to the transmission combination. The double-station drive disk rotates 180 degrees to bring the first rewinding shaft to the front side, and the first rewinding shaft brings the first roll to the top of the front drag balance roller, and brings the second rewinding shaft to the back side to wait for the second roll to continue to receive the tape substrate. The tape substrate is pulled down by the first roll rotating to the front side and there is a connecting section between the second roll rotated to the back side. The connecting section passes through the bottom side of the cutting knife, and the first rewinding shaft and the second rewinding shaft stop rotating. When the electric cylinder drive frame rises with the drag balance roller, the electric cylinder drive frame drives the first transmission combination, and the first transmission combination drives the lifting frame to descend, so that the downward pressure balance roller descends and rolls on the outer cylindrical surface of the free end of the first rewinding shaft, and the outer cylindrical surface of the drag balance roller is aimed at the first When the lifting frame is lowered, the first reel is lifted and the first reel is lifted up, so that the lifting frame can be lowered. When the lifting frame is lowered, the first reel is lifted and the second reel is lifted, so that the lifting frame can be lowered. When the lifting frame is lowered, the first reel is lifted and the second reel is lifted, so that the lifting frame can be lowered. When the lifting frame is lowered, the first reel is lifted and the second reel is lifted, so that the lifting frame can be lowered. When the lifting frame is lowered, the first reel is lifted and the second reel is lifted, so that the lifting frame can be lowered. When the lifting frame is lowered, the first reel is lifted and the second reel is lifted, so that the lifting frame can be lowered

[0014] The cutting process requires no manual intervention. The dual-station design, coupled with high-speed, precise cutting and switching, significantly improves equipment utilization and production efficiency, making it particularly suitable for large-scale, high-speed production of medical tapes. The coordinated balancing of the upper and lower balance rollers ensures highly consistent tape winding tension from the core to the outer layer of the dual-station rewinding shaft, directly determining the tightness and uniformity of the finished roll. The resulting finished roll has a flat end surface and neat side edges, meeting the aesthetic requirements of high-quality medical products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a medical tape dynamic stress balancing rewinder from a front side perspective provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of a medical tape dynamic stress balancing rewinder provided by an embodiment of the present invention from a second perspective;

[0017] Figure 3 A medical tape dynamic stress balancing rewinding machine provided by the embodiment of the present invention is composed of Figure 2Schematic enlarged view of part A drawn out

[0018] Figure 4 Partial schematic view of a medical tape dynamic stress balance rewinder provided by an embodiment of the present invention

[0019] Figure 5 A medical tape dynamic stress balance rewinder provided by an embodiment of the present invention consists of Figure 4 Schematic bottom view drawn out

[0020] In the figure: 1, frame; 2, double-station drive disk; 3, first rewinding shaft; 4, second rewinding shaft; 5, cutting frame; 6, screw; 7, cutting seat; 8, cutting knife; 9, drive assembly; 10, electric cylinder drive frame; 11, lifting balance roller; 12, lifting frame; 13, pressing balance roller; 14, reciprocating groove; 15, horizontal seat; 16, second guide rail; 17, first gear; 18, first rack; 19, second rack; 20, second gear; 21, third gear; 22, distribution box; 23, bending part Specific embodiments

[0021] The following will clearly and completely describe the above-mentioned and other embodiments and advantages of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments

[0022] In one embodiment, as Figures 1-5 shown

[0023] This embodiment provides a medical tape dynamic stress balance rewinder, including a frame 1. A conveying roller combination is arranged inside the frame 1. A double-station drive disk 2 is installed on one side inside the frame 1 at the discharge side of the conveying roller combination. A first rewinding shaft 3 and a second rewinding shaft 4 are installed on the double-station drive disk 2. A cutting frame 5 is installed inside the frame 1. The cutting frame 5 extends along the length direction between the first rewinding shaft 3 and the second rewinding shaft 4. A screw 6 is rotatably connected inside the cutting frame 5. A reciprocating groove 14 is formed inside the cutting frame 5. A cutting seat 7 driven on the screw 6 is arranged inside the reciprocating groove 14. A cutting knife 8 extending between the first rewinding shaft 3 and the second rewinding shaft 4 is installed on the cutting seat 7. An electric cylinder drive frame 10 is arranged inside the frame 1. A lifting balance roller 11 is rotatably connected to the top end of the electric cylinder drive frame 10. A lifting frame 12 and a drive assembly 9 are arranged inside the frame 1. A pressing balance roller 13 is rotatably connected to the end of the lifting frame 12. The drive assembly 9 includes a first transmission combination driven on the lifting frame 12 and also includes a second transmission combination driven on the screw 6

[0024] Detailed working principle

[0025] Continuous feeding and conveying: The medical tape substrate is usually a wide roll of tape that is continuously fed into the machine and smoothly conveyed along a predetermined path by a conveying roller assembly in the direction of the dual-station driving disk 2. For example, the first reel is pre-sleeved on the first rewinding shaft 3. The dual-station driving disk 2 brings the first rewinding shaft 3 to the output end of the tape, and the first rewinding shaft 3 rotates the first reel through its own rotation, so that the tape is rewound once on the first reel. At this time, the second rewinding shaft 4 is located at the front side. The second reel is sleeved on the second rewinding shaft 4. The dual-station driving disk 2 rotates 180 degrees, brings the first rewinding shaft 3 to the front side, and the first rewinding shaft 3 brings the first reel to the front side and lifts it above the lifting balance roller 11. The second rewinding shaft 4 is brought to the rear side to wait for the second reel to continue receiving the tape substrate. There is a connecting section between the tape substrate due to the rotation of the first reel to the front side and the second reel that has rotated to the rear side. The connecting section passes under the bottom side of the cutting knife 8. The first rewinding shaft 3 and the second rewinding shaft 4 stop rotating. At this time, the electric cylinder drive frame 10 drives the lifting balance roller 11 to rise. At the same time, the electric cylinder drive frame 10 drives the first transmission assembly, and the first transmission assembly drives the lifting frame 12 to descend, so that the pressing balance roller 13 descends and rolls on the outer circular surface of the free end of the first rewinding shaft 3. The outer circular surface of the lifting balance roller 11 rolls on the outer layer of the tape substrate of the first reel. The rising amplitude of the electric cylinder drive frame 10 is relatively large. During its rising process, it will drive the screw 6 to rotate in advance through the second transmission assembly. When the electric cylinder drive frame 10 rises to the set position, it drives the first transmission assembly, and the first transmission assembly drives the lifting frame 12 to descend. In this way, the screw 6 rotates for a long time to move the cutting seat 7 with the cutting knife 8 from left to right while automatically cutting off the connecting section of the tape substrate between the first reel and the second reel. As the electric cylinder drive frame 10 rises to the maximum position, the pressing balance roller 13 rolls on the outer circular surface of the free end of the first rewinding shaft 3, and by linking the first transmission assembly, the outer circular surface of the lifting balance roller 11 rolls on the outer layer of the tape substrate of the first reel, so that the first rewinding shaft 3 quickly maintains balance. The first rewinding shaft 3 drives the first reel to rotate smoothly again, so that the cut end is completely wound onto the first reel.

[0026] Continuing from the above, while the first reel is completely wound up, the second rewinding shaft 4 on another work station winds up the second reel with the other cut end of the tape substrate. The first rewinding shaft 3 rotates the first reel at the front side. After completely winding up the broken tape substrate, the electric cylinder drive frame 10 drives the lifting balance roller 11 to descend, and the lifting balance roller 11 leaves the first reel, removing the first reel with the wound-up tape from the first rewinding shaft 3. The first transmission combination and the second transmission combination drive in reverse, that is, the pressing balance roller 13 moves upward away from the first rewinding shaft 3, and the cutting seat 7 drives the cutting knife 8 to reset to the left. The double-station drive disk 2 rotates 180 degrees, bringing the second rewinding shaft 4 to the front side and the first rewinding shaft 3 to the rear side. The second reel on the second rewinding shaft 4 switches the wound tape substrate above the lifting balance roller 11. The electric cylinder drive frame 10 drives the lifting balance roller 11 to rise again, making the lifting balance roller 11 press on the outer layer of the tape substrate relative to the second reel. And so on, driven by the rise of the lifting balance roller 11, the first transmission combination and the second transmission combination act again, the cutting knife 8 moves from left to right to complete cutting again, and the pressing balance roller 13 completes descending again.

[0027] The whole process is completed in a short time. Especially when the first rewinding shaft 3 and the second rewinding shaft 4 switch positions by 180 degrees front and back, through the first transmission combination and the second transmission combination in the drive assembly 9, it can not only automatically cut the connecting section of the tape substrate between the first rewinding shaft 3 and the second rewinding shaft 4, but also make the reel on the first rewinding shaft 3 rotate smoothly when completely wound up. The cutting process does not require manual operation of the knife. The double-station design cooperates with high-speed and precise cutting and switching actions, greatly improving the equipment utilization rate and production efficiency, and is especially suitable for large-scale and high-speed production of medical tapes.

[0028] The coordinated balancing method of the upper and lower balance rollers ensures that the winding tension (stress) of the tape from the core to the outer layer of the double-station rewinding shaft is highly consistent, which directly determines the tightness and uniformity of the finished reel. Finally, the end face of the finished reel is flat and the side edges are neat, meeting the appearance requirements of high-quality medical products.

[0029] The screw drive + guide rail structure ensures the smoothness and positioning accuracy of the cutting knife during high-speed movement. The whole process (winding, balance correction, cutting, station switching, new reel start) is highly automated, reducing manual intervention, lowering labor intensity, and improving production consistency. In actual production, a programmable logic controller (PLC) is used to achieve automation.

[0030] This medical tape dynamic stress-balancing rewinder, through its innovative dual-station switching, screw-driven high-precision cutting, and core dual-balance roller dynamic stress control system, perfectly solves the challenges of manual station switching, manual balancing, and manual cutting in high-speed continuous production of medical tape. The resulting medical tape rolls meet extremely high standards in appearance, firmness, and performance (such as smooth unwinding and no residual adhesive), meeting the stringent quality requirements of the medical industry.

[0031] like Figures 2 to 5 As shown, the first transmission assembly includes a second guide rail 16 installed on the right end of the frame 1, and the right end of the lifting frame 12 is slidably fitted on the second guide rail 16. The first transmission assembly also includes a first gear 17 connected to the right end of the interior of the frame 1, including a first rack 18 connected to the electric cylinder drive frame 10, and also includes a second rack 19 installed on the lifting frame 12. The first gear 17 is meshed between the first rack 18 and the second rack 19. The second transmission assembly includes a second gear 20 connected to the right end of the interior of the frame 1, and also includes a third gear 21 installed at the right end of the screw 6. The second gear 20 is away from the top of the first gear 17. The third gear 21 engages with the second gear 20. The top of the first rack 18 is provided with an extension portion, which extends upward and engages with the second gear 20. When the electric cylinder drives the frame 10 to rise, the first rack 18 engages with the first gear 17 to rotate counterclockwise, and the first gear 17 engages with the second rack 19 to descend, and the second rack 19 drives the lifting frame 12 to descend, and the first rack 18 engages with the second gear 20 to rotate counterclockwise, and the second gear 20 engages with the third gear 21 to rotate clockwise, and the third gear 21 drives the screw 6 to rotate clockwise, the screw 6 drives the cutting seat 7, and the cutting seat 7 drives the cutting knife 8 to move linearly.

[0032] Taking the first rewinding shaft 3 as an example, when the first rewinding shaft 3, together with the reel and the tape substrate carried by the reel, switches to the front side, the reel is located above the lifting balance roller 11. The electric cylinder drive frame 10 drives the lifting balance roller 11 to rise, and drives the first rack 18 to rise. The first rack 18 first uses the tooth surface on the top section to engage with the second gear 20 to rotate. The second gear 20 engages with the third gear 21 to rotate. The third gear 21 drives the screw rod 6 to rotate. The screw rod 6 drives the cutting seat 7, and the cutting seat 7 drives the cutting knife 8 to move linearly. First, the cutting of the tape connection section between the reels on the first rewinding shaft 3 and the second rewinding shaft 4 is completed. The electric cylinder drive frame 10 drives the lifting balance roller 11 to continue rising, so that the outer cylindrical surface of the lifting balance roller 11 rolls on the outer layer of the tape after the reel is wound. At the same time, the tooth surface on the bottom section of the first rack 18 engages with the first gear 17 again, driving the first gear 17 to rotate. The first gear 17 engages with the second rack 19 to descend, and the second rack 19 drives the lifting frame 12 to descend. Finally, the pressing balance roller 13 is pressed on the outer cylindrical surface of the free end of the first rewinding shaft 3 through the lifting frame 12. Through the two-stage transmission relationship of the first rack 18, the cutting knife 8 first completes a long-distance cutting action, and then the pressing balance roller 13 is pressed on the first rewinding shaft 3, which not only ensures that the cutting knife 8 has enough stroke to cut off the substrate connection section, but also reduces the lifting stroke of the pressing balance roller 13, saving space.

[0033] As Figures 1 to 4 shown, the cutting frame 5 is located at the rear (i.e., close to the feeding end of the substrate). The bottom of the reciprocating groove 14 penetrates through the bottom surface of the cutting frame 5. The bottom end of the cutting knife 8 passes through the bottom surface of the cutting frame 5 through the reciprocating groove 14.

[0034] It should be further noted that a distribution box 22 is provided at the right end of the frame 1. A driving device is installed in the distribution box 22. The moving end of the driving device enters the frame 1 and corresponds to the vicinity of the free ends of the first rewinding shaft 3 and the second rewinding shaft 4.

[0035] It should be further noted that the end of the lifting frame 12 is provided with a bent portion 23 that bends forward, and the pressing balance roller 13 is installed on the bent portion 23.

[0036] It should be further noted that guide rail structures are installed on the left and right inner walls of the frame 1. The two ends of the electric cylinder driving frame 10 are slidably engaged with the left and right guide rail structures. The lifting balance roller 11 is installed on the top of the electric cylinder driving frame 10 through the left and right bearing seats. When the first rewinding shaft 3 and the second rewinding shaft 4 rotate to the front side in sequence, they reach above the lifting balance roller 11. In actual use, the electric cylinder is controlled by the controller to form a control association with the servo motor where the double-station driving disc 2 is located. For example, when the double-station driving disc 2 rotates 180 degrees to switch the front and rear positions of the first rewinding shaft 3 and the second rewinding shaft 4, it will control the electric cylinder to drive the electric cylinder driving frame 10 to complete a lifting, realizing automation.

[0037] It should be further noted that the first rewinding shaft 3 and the second rewinding shaft 4 are driven by separate servo motors at the connection of the double-station driving disc 2 to enable them to rotate independently. The control method and specific structure are the prior art of the double-station rewinder and will not be elaborated here.

[0038] The above orientation references do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and is set with relative descriptions with reference to the orientations in the figure. In essence, the specific orientations of the components are based on their actual installation, actual use, and the habitual orientation descriptions of those skilled in the art. This is hereby stated.

[0039] The above-described specific implementation manners have further elaborated on the invention purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manners of the present invention and is not used to limit the protection scope of the present invention. It is specifically pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dynamic stress balance rewinder for medical tapes, characterized in that, It includes a frame (1). Inside the frame (1), there is a conveying roller combination. On the discharge side of the conveying roller combination, there is a double-station driving disc (2) installed on one side inside the frame (1). A first rewinding shaft (3) and a second rewinding shaft (4) are installed on the double-station driving disc (2). Inside the frame (1), a cutting frame (5) is installed. The cutting frame (5) extends longitudinally between the first rewinding shaft (3) and the second rewinding shaft (4). A screw rod (6) is rotatably connected inside the cutting frame (5). A reciprocating groove (14) is formed inside the cutting frame (5). Inside the reciprocating groove (14), there is a cutting seat (7) driven on the screw rod (6). A cutting knife (8) extending between the first rewinding shaft (3) and the second rewinding shaft (4) is installed on the cutting seat (7). Inside the frame (1), there is an electric cylinder driving frame (10). At the top of the electric cylinder driving frame (10), a lifting balance roller (11) is rotatably connected. Inside the frame (1), there is a lifting frame (12) and a driving assembly (9). At the end of the lifting frame (12), a pressing balance roller (13) is rotatably connected. The driving assembly (9) includes a first transmission combination driven on the lifting frame (12), and also includes a second transmission combination driven on the screw rod (6).

2. The dynamic stress balance rewinder for medical tapes according to claim 1, characterized in that, At least one conveying roller on the discharge side of the conveying roller combination is close to the double-station driving disc (2) to convey the tape to the first rewinding shaft (3) or the second rewinding shaft (4).

3. The dynamic stress balance rewinder for medical tapes according to claim 2, characterized in that, Guide rail structures are installed on the left and right inner walls of the frame (1). The two ends of the electric cylinder driving frame (10) are slidably fitted on the left and right guide rail structures. The lifting balance roller (11) is installed at the top of the electric cylinder driving frame (10) through two bearing seats. When the first rewinding shaft (3) and the second rewinding shaft (4) rotate to the front side in sequence, they reach above the lifting balance roller (11).

4. The dynamic stress balance rewinder for medical tapes according to claim 3, characterized in that, A horizontal seat (15) is installed at the bottom of the front side of the frame (1). An electric cylinder vertically upward is installed on the horizontal seat (15). The electric cylinder driving frame (10) is installed at the top of the electric cylinder.

5. The dynamic stress balance rewinder for medical tapes according to claim 4, wherein, The cutting frame (5) is at the rear. The bottom of the reciprocating groove (14) penetrates the bottom surface of the cutting frame (5). The bottom end of the cutting knife (8) passes through the bottom surface of the cutting frame (5) through the reciprocating groove (14).

6. The dynamic stress balance rewinder for medical tapes according to claim 5, wherein The first transmission assembly includes a second guide rail (16) mounted on the right end of the frame (1), and the right end of the lifting frame (12) is slidably engaged with the second guide rail (16). The first transmission assembly also includes a first gear (17) connected to the right end inside the frame (1), including a first rack (18) connected to the electric cylinder drive frame (10), and also includes a second rack (19) mounted on the lifting frame (12). The first gear (17) is engaged between the first rack (18) and the second rack (19). The second transmission assembly includes a second gear (20) connected to the right end inside the frame (1), and also includes a third gear (21) mounted on the right end of the screw (6). The second gear (20) is away from the top of the first gear (17). The third gear (21) meshes with the second gear (20), the top end of the first rack (18) is provided with an extension portion, the extension end extends upward and meshes with the second gear (20), when the electric cylinder drives the frame (10) to rise, the first rack (18) meshes with the first gear (17) to rotate counterclockwise, the first gear (17) meshes with the second rack (19) to descend, and the second rack (19) drives the lifting frame (12) to descend, the first rack (18) meshes with the second gear (20) to rotate counterclockwise, and the second gear (20) meshes with the third gear (21) to rotate clockwise, the third gear (21) drives the screw (6) to rotate clockwise, the screw (6) drives the cutting seat (7), and the cutting seat (7) drives the cutting knife (8) to move linearly.

7. A dynamic stress balance rewinder for medical tapes according to claim 6, characterized in that, A distribution box (22) is provided at the right end of the frame (1), and a driving device is installed in the distribution box (22). The action end of the driving device enters the frame (1) and corresponds to the free ends of the first rewinding shaft (3) and the second rewinding shaft (4).

8. A dynamic stress balance rewinder for medical tapes according to claim 7, characterized in that, The end of the lifting frame (12) is provided with a bending portion (23) bent forward, and the downward pressure balancing roller (13) is installed on the bending portion (23).

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