Dotted line pressure cut rewinder

Abstract

This invention belongs to the field of printing machinery technology, specifically relating to a dotted-line die-cutting and rewinding machine. It includes a frame with side wall panels, an unwinding mechanism at the front end of the frame, and a rewinding mechanism at the rear end. A traction mechanism and a die-cutting mechanism are sequentially arranged between the unwinding and rewinding mechanisms. Several guide rollers are arranged between the unwinding and traction mechanisms, and between the die-cutting and rewinding mechanisms. A sensing roller is also provided to detect the tension of the film and transmit the data to a PLC, thereby controlling the motor speed to ensure the film tension reaches a set value. In this dotted-line die-cutting and rewinding machine, the blade roller is fixed in position and directly driven to rotate by a servo motor. The distance of the perforations on the film is controlled by the up-and-down movement of the bottom roller, ensuring a stable connection between the blade roller and the bottom roller.

Description

Technical Field

[0001] This invention belongs to the field of printing machinery technology, specifically relating to a dotted-line die-cutting and rewinding machine. Background Technology

[0002] In pharmaceutical packaging, some medicine packets require a perforated line to be cut between the printed patterns after printing, facilitating separation after packaging. Currently, the most common method used by medicine packet manufacturers is laser ablation to cut the perforated line. However, because the material reacts significantly to heat, the perforated lines often have rough edges and are prone to deformation. Existing perforation cutting devices have problems. The cutting roller can cut four medicine packets in one rotation. To allow one roller to cut different sizes of medicine packets, it needs to accelerate and decelerate four times. During acceleration and deceleration, the roller surface vibrates significantly, resulting in a low yield of perforated lines and failing to meet the requirements for technological replacement. Summary of the Invention

[0003] To overcome the shortcomings of the existing technology, the present invention provides a dotted line pressure cutting and rewinding machine.

[0004] This invention is achieved through the following technical solution: a dotted-line pressure cutting and rewinding machine, comprising a frame with side wall panels, an unwinding mechanism at the front end of the frame, a winding mechanism at the rear end of the frame, a traction mechanism and a pressure cutting mechanism arranged sequentially between the unwinding mechanism and the winding mechanism, a plurality of guide rollers arranged between the unwinding mechanism and the traction mechanism and between the pressure cutting mechanism and the winding mechanism, and a sensing roller is also provided. The sensing roller is used to detect the tension of the film and transmit the data to the PLC, thereby controlling the motor speed so that the tension of the film reaches the set value.

[0005] In the above scheme, in order to make the material roll tightly packed and not loose, a material receiving pressure roller device is provided at the rear end of the frame. The material receiving pressure roller device includes a material receiving pressure roller arm, one end of which is hinged to the frame and the other end is hinged to a forearm. A material receiving pressure roller is provided at the end of the forearm, and a pressure roller arm cylinder is connected to the body of the material receiving pressure roller arm.

[0006] In the above scheme, an angle positioning screw is provided at the junction of the forearm and the receiving roller.

[0007] In the above scheme, the cutting mechanism includes a cutter roller, a bottom roller, and a pressure roller. The film is passed out around the bottom roller. The cutter roller is set on the bottom roller and fixed on the frame. The shaft end of the cutter roller is equipped with a cutter roller servo motor to directly drive the cutter roller to rotate. The bottom roller is fixed on the two side wall plates and can move up and down. The shaft end of the bottom roller is equipped with a bottom roller servo motor to directly drive the bottom roller to rotate. The pressure roller is arranged side by side on the side of the bottom roller and can move horizontally.

[0008] In the above scheme, the bottom roller is provided with longitudinal first linear guide pairs at both ends. The first linear guide pairs are fixed to the inner side of the wall panel. A slide plate is provided on the first linear guide pairs. A slider A that moves on the slide plate is provided on the slide plate. The bottom roller is fixed to the slider A by bearings. A bottom roller drive cylinder is connected to the slide plate.

[0009] In the above scheme, the lower end of the slider A is provided with an adjusting screw, the upper end of the adjusting screw is connected to the slider A through a nut, the lower end of the adjusting screw is connected to an adjusting rod through a bevel gear transmission pair, and the shaft end of the adjusting rod is provided with a dial handwheel.

[0010] In the above scheme, bottom roller synchronous racks are provided on both sides of the sliding plate, and the bottom roller synchronous racks mesh with coaxial gears.

[0011] In the above scheme, the pressure roller is provided with a second linear guide pair at both ends, and the pressure roller is fixed on the slider B of the second linear guide pair by bearings. The slider is connected to a pressure roller cylinder that drives the pressure roller to move laterally.

[0012] In the above scheme, the slider B is provided with a pressure roller synchronous rack, which meshes with a coaxial gear.

[0013] Compared with the prior art, the advantages of the dotted-line cutting and rewinding machine of this invention are:

[0014] 1. The blade roller and bottom roller of this dotted line cutting and rewinding machine are driven by independent servo motors, which effectively eliminates the problem of tooth backlash that cannot be eliminated and the precision is limited caused by gear transmission.

[0015] 2. The cutter roller is fixed in position and is directly driven to rotate by a servo motor. The rotation speed of the cutter roller remains constant, which makes the operation of the cutter roller and the bottom roller stable. The distance of the perforation on the film is controlled by the up and down movement of the bottom roller.

[0016] 3. The relative position of the cutter roller is fixed, and it is driven to rotate by a servo motor. The cutter roller can cut 4 medicine packets in one rotation. In order to enable one cutter roller to cut medicine packets of different sizes, it needs to accelerate and decelerate 4 times. During the acceleration and deceleration process, the rotational impact of the cutter roller is directly transmitted to the machine frame, so the quality is stable and reliable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a dashed-line pressure cutting and rewinding machine according to the present invention.

[0018] Figure 2 yes Figure 1 An enlarged view of the medium-pressure cutting mechanism 6.

[0019] Figure 3 yes Figure 2 View A in the diagram.

[0020] Figure 4 yes Figure 2 Rotate view in direction B.

[0021] In the diagram: 1. Unwinding mechanism, 2. Frame, 3. Sensing roller, 4. Traction mechanism, 5. Film, 6. Cutting mechanism, 7. Pressure roller arm cylinder, 8. Take-up pressure roller arm, 9. Forearm, 10. Angle positioning screw, 11. Take-up pressure roller, 12. Winding mechanism, 13. Cutting roller, 14. Bottom roller, 15. Pressure roller, 16. Pressure roller cylinder, 17. Pressure roller synchronous rack, 18. Bottom roller synchronous rack, 19. Bottom roller drive cylinder, 20. Bevel gear transmission pair, 21. Adjusting rod, 22. Dial handwheel, 23. Bottom roller servo motor, 24. Cutting roller servo motor, 25. Slider A, 26. Nut, 27. Adjusting screw, 28. Slide plate, 29. Second linear guide pair, 30. Slider B, 31. First linear guide pair. Detailed Implementation

[0022] The dashed-line cutting and rewinding machine of the present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 This is a schematic diagram of the structure of a dashed-line cutting and rewinding machine according to the present invention. Figure 2 yes Figure 1 Enlarged view of component 6 Figure 3 yes Figure 2 View A in the middle, Figure 4 yes Figure 2The figure shows a view from direction B. The dashed-lined pressure-cutting and rewinding machine includes a frame 2 with side wall panels. An unwinding mechanism 1 is located at the front end of the frame 2, and a winding mechanism 12 is located at the rear end. A traction mechanism 4 and a pressure-cutting mechanism 6 are sequentially arranged between the unwinding mechanism 1 and the winding mechanism 12. Several guide rollers are arranged between the unwinding mechanism 1 and the traction mechanism 4, and between the pressure-cutting mechanism 6 and the winding mechanism 12. A sensing roller 3 is also provided. The sensing roller 3 detects the tension of the film 5 and transmits the data to the PLC, thereby controlling the motor speed to ensure the film tension reaches the set value. To ensure that the material roll is tightly packed and not loose, a material receiving pressure roller device is provided at the rear end of the frame 2. The material receiving pressure roller device includes a material receiving pressure roller arm 8, one end of which is hinged to the frame 2, and the other end is hinged to a small arm 9. A material receiving pressure roller 11 is provided at the end of the small arm 9. A pressure roller arm cylinder 7 is connected to the arm of the material receiving pressure roller arm 8. An angle positioning screw 10 is provided at the junction of the small arm 9 and the material receiving pressure roller 11. The cutting mechanism 6 includes a cutter roller 13, a bottom roller 14, and a pressure roller 15. The film 5 passes around the bottom roller 14 and is transmitted out. The cutter roller 13 is set on the bottom roller 14 and fixed on the frame. The shaft end of the cutter roller 13 is equipped with a cutter roller servo motor 24 to directly drive the cutter roller to rotate. The two ends of the bottom roller 14 are equipped with a longitudinal first linear guide pair 31. The first linear guide pair 31 is fixed on the inner side of the wall panel. The first linear guide pair 31 is equipped with a slide plate 28. The slide plate 28 is equipped with a slider A25 that moves on the slide plate. The bottom roller is fixed to the slider A by a bearing. The slide plate 28 is connected to the bottom roller drive cylinder 19. The lower end of the slider A25 is equipped with an adjusting screw 27. The upper end of the adjusting screw 27 is connected to the slider A25 by a nut 26. The lower end of the adjusting screw 27 is connected to an adjusting rod 21 by a bevel gear transmission pair 20. The shaft end of the adjusting rod 21 is equipped with a dial handwheel 22. A bottom roller servo motor 23 is installed at the shaft end of the bottom roller 14 to directly drive the bottom roller to rotate. Pressure rollers 15 are arranged side-by-side on the sides of the bottom roller 14 and can move horizontally. Bottom roller synchronization racks 18 are installed on the sliding plates on both sides, meshing with coaxial gears to ensure synchronization and prevent deviation when the bottom roller 14 moves up and down. Second linear guide pairs 29 are installed at both ends of the pressure roller 15. The pressure roller is fixed to the slider B30 of the second linear guide pair by bearings. A pressure roller cylinder 16 is connected to the slider B30 to drive the pressure roller to move laterally. A pressure roller synchronization rack 17 is installed on the slider B30, meshing with coaxial gears.

[0024] During operation, the film 5 is fed from the unwinding mechanism 1 to the cutting mechanism 6 via the traction mechanism 4. When perforations need to be punched on the film, the bottom roller 14 moves the film 5 upward to contact the cutter roller 13. When an interruption is needed, the bottom roller moves downward to separate from the cutter roller, and the cutter roller no longer punches holes in the film. After the perforation is completed, the film is wound onto the winding mechanism 12 via the guide roller. The take-up pressure roller 11 presses the film tightly in real time to ensure that the take-up roll is tight and not loose.

[0025] The cutter roller and bottom roller of this dotted-line pressure cutting and rewinding machine are driven by independent servo motors, which can complete the packaging materials with varying circumference within a certain range. The cutter roller is fixed in position and is directly driven to rotate by the servo motor. The rotation speed of the cutter roller remains constant, which makes the operation of the cutter roller and the bottom roller stable. The distance of the perforation on the film is controlled by the up and down movement of the bottom roller, which effectively eliminates the problems of tooth gap that cannot be eliminated and the limited accuracy caused by using gears to transmit power.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the methods and techniques disclosed above without departing from the scope of the present invention to create equivalent embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method of using a dotted-line pressing and rewinding machine, the dotted-line pressing and rewinding machine comprising a frame (2) with side wall panels, an unwinding mechanism (1) at the front end of the frame (2), and a winding mechanism (12) at the rear end of the frame (2), characterized in that: A traction mechanism (4) and a cutting mechanism (6) are arranged sequentially between the unwinding mechanism (1) and the winding mechanism (12). Several guide rollers are arranged between the unwinding mechanism (1) and the traction mechanism (4) and between the cutting mechanism (6) and the winding mechanism (12). A sensing roller (3) is also arranged. The sensing roller (3) is used to detect the tension of the film and transmit the data to the PLC, thereby controlling the motor speed so that the tension of the film reaches the set value. The cutting mechanism (6) includes a cutter roller (13), a bottom roller (14), and a pressure roller (15). The film (5) passes around the bottom roller (14) and is transmitted out. The cutter roller (13) is set on the bottom roller (14) and fixed on the frame (2). The shaft end of the cutter roller (13) is equipped with a cutter roller servo motor (24) to directly drive the cutter roller to rotate. The bottom roller (14) is fixed on both side walls and can move up and down. The shaft end of the bottom roller (14) is equipped with a bottom roller servo motor (23) to directly drive the bottom roller to rotate. The pressure roller (15) is arranged side by side on the side of the bottom roller (14) and can move horizontally. During operation, the film (5) is sent from the unwinding mechanism (1) to the cutting mechanism (6) via the traction mechanism (4). When it is necessary to punch dotted holes on the film, the bottom roller (14) moves the film (5) upward to contact the cutter roller (13). When it is necessary to interrupt the operation, the bottom roller moves downward to separate from the cutter roller, and the cutter roller no longer punches holes in the film. After the film is punched, it is wound onto the winding mechanism (12) via the guide roller. The winding pressure roller (11) presses the film tightly in real time to make the winding roll tight and not loose. The cutter roller and bottom roller of this dotted line cutting and rewinding machine are driven by independent servo motors. The cutter roller is fixed in position and is directly driven to rotate by the servo motor. The rotation speed of the cutter roller remains constant, which makes the operation of the cutter roller and the bottom roller stable. The distance of the perforation on the film is controlled by the up and down movement of the bottom roller.

2. The method of using a dotted-line cutting and rewinding machine according to claim 1, characterized in that: The rear end of the frame (2) is provided with a receiving pressure roller device, which includes a receiving pressure roller arm (8). One end of the receiving pressure roller arm (8) is hinged to the frame (2), and the other end is hinged to a small arm (9). The end of the small arm (9) is provided with a receiving pressure roller (11), and a pressure roller arm cylinder (7) is connected to the arm of the receiving pressure roller arm (8).

3. The method of using a dotted-line cutting and rewinding machine according to claim 2, characterized in that: An angular positioning screw (10) is provided at the junction of the forearm (9) and the receiving roller (11).

4. The method of using a dotted-line cutting and rewinding machine according to claim 1, characterized in that: The bottom roller (14) is provided with longitudinal first linear guide pairs (31) at both ends. The first linear guide pairs (31) are fixed to the inner side of the wall panel. A slide plate (28) is provided on the first linear guide pairs (31). A slider A (25) that moves on the slide plate is provided on the slide plate (28). The bottom roller (14) is fixed on the slider A (25) by bearings. A bottom roller drive cylinder (19) is connected to the slide plate (28).

5. The method of using a dotted-line cutting and rewinding machine according to claim 4, characterized in that: The lower end of the slider A (25) is provided with an adjusting screw (27), the upper end of the adjusting screw (27) is connected to the slider A (25) through a nut (26), the lower end of the adjusting screw (27) is connected to an adjusting rod (21) through a bevel gear transmission pair (20), and the shaft end of the adjusting rod (21) is provided with a dial handwheel (22).

6. The method of using a dotted-line cutting and rewinding machine according to claim 4, characterized in that: Both sides of the slide plate (28) are provided with bottom roller synchronous racks (18), which mesh with coaxial gears.

7. The method of using a dotted-line cutting and rewinding machine according to claim 1, characterized in that: The pressure roller (15) is provided with a second linear guide pair (29) at both ends. The pressure roller (15) is fixed on the slider B (30) of the second linear guide pair by bearings. The slider B (30) is connected to a pressure roller cylinder (16) that drives the pressure roller to move laterally.

8. The method of using a dotted-line cutting and rewinding machine according to claim 7, characterized in that: The slider B (30) is provided with a pressure roller synchronous rack (17), which meshes with a coaxial gear.

Images