An intermittent die cutting machine and a control method thereof

Abstract

The present application relates to the technical fields of die cutting processing, and particularly relates to an intermittent die cutting machine and a control method thereof, the die cutting machine comprising a material belt unwinding roller, a die cutting mechanism, a material belt winding roller and an intermittent conveying mechanism arranged below the die cutting mechanism; the intermittent conveying mechanism comprising a front guide roller set, a rear guide roller set and a moving buffer roller set located between the front guide roller set and the rear guide roller set; the moving buffer roller set comprising a moving seat, two traction rollers arranged side by side on the moving seat and a driving assembly; the material belt entering the front guide roller set and the rear guide roller set is wrapped around the corresponding side traction rollers, and the wrapping directions of the material belts on the two traction rollers are opposite; the driving assembly drives the moving seat to reciprocate to change the buffer length of the material belt at the front guide roller set and the rear guide roller set, and further change the conveying direction of the material belt at the position of the die cutting mechanism. Through the present application, intermittent and reciprocating conveying of the material belt at the die cutting mechanism can be realized, the interval between two die cutting processes is reduced, and the waste of the material belt is reduced.

Description

Technical Field

[0001] This invention relates to the field of die-cutting technology, and more particularly to an intermittent die-cutting machine and its control method. Background Technology

[0002] Currently, most die-cutting machines on the market use a circular cutter structure to complete the continuous die-cutting operation of layered material strips. The specific operation process is as follows: the conveyor mechanism drives the layered material strip to be continuously conveyed, and the rotating circular cutter, together with the material strip roller, performs die-cutting processing on the material strip during the conveying process. After the die-cutting is completed, the waste part of the material strip is peeled off from the base material strip, and the qualified material strip is wound up and collected by the winding mechanism.

[0003] The existing circular cutter has a circumferential structure divided into a die-cutting area and a clearance area, and is not a full-circumferential cutting edge structure. During the continuous rotation of the circular cutter with the shaft, the die-cutting of the strip can be realized only when the die-cutting area is in contact with the strip; when the clearance area rotates to the working position, the circular cutter completely disengages from the strip and the die-cutting operation is suspended, thereby realizing intermittent die-cutting of the strip.

[0004] However, due to the structural limitations of the circular cutter's clearance area, there will be unused redundant material left between two adjacent die-cutting areas on the strip. This part of the material cannot be used for product molding and will eventually be peeled off and discarded along with the waste, directly causing waste of the strip's raw materials and resulting in low material utilization. Summary of the Invention

[0005] This invention provides an intermittent die-cutting machine and its control method, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An intermittent die-cutting machine includes a strip unwinding roller, a die-cutting mechanism, a strip winding roller, and a waste film winding mechanism, characterized in that it further includes an intermittent conveying mechanism arranged below the die-cutting mechanism; The intermittent conveying mechanism includes a front guide roller group, a rear guide roller group, and a movable buffer roller group located between the two. The movable buffer roller assembly includes a movable base, two traction rollers arranged side by side on the movable base, and a drive assembly; The material strips entering the front guide roller group and the rear guide roller group are respectively wrapped around the traction rollers on the corresponding sides, and the wrapping directions of the material strips on the two traction rollers are opposite. The drive assembly drives the moving seat to reciprocate, thereby changing the buffer length of the strip at the front guide roller group and the rear guide roller group, and thus changing the conveying direction of the strip at the position of the die-cutting mechanism.

[0007] Furthermore, the drive assembly includes a drive motor and a transmission mechanism; The transmission mechanism converts the rotational motion of the drive motor into the linear reciprocating motion of the moving seat.

[0008] Furthermore, a sliding guide is provided below both of the movable seats.

[0009] Furthermore, sensing components are provided along the moving path of the movable seat, corresponding to the die-cutting position and the avoidance position of the circular cutter on the die-cutting mechanism.

[0010] Furthermore, the movable seat comprises, from bottom to top, a base plate, a middle plate, and a top plate; The conveyor belt is sandwiched between the bottom plate and the middle plate, and mounting holes for installing the two traction rollers are formed on the opposite surfaces of the middle plate and the top plate.

[0011] Furthermore, both the front guide roller group and the rear guide roller group include a reversing roller and two guide rollers; The two guide rollers are arranged vertically, with the lower guide roller and the bottom traction surface of the traction roller on the same horizontal plane. The bottom traction surface of the reversing roller and the top traction surface of the traction roller are located on the same horizontal plane.

[0012] Furthermore, the waste film winding mechanism includes a paper guide roller assembly and a waste film winding roller; The paper guide roller assembly is located at the discharge end of the die-cutting mechanism and is used to guide the die-cut waste film to the waste film take-up roller.

[0013] Furthermore, the waste film winding mechanism includes a waste scraping roller and a conveyor belt; The waste removal roller is equipped with a scraper on one side of the conveyor belt. The scraper is used to remove the waste film that is stuck to or wrapped around the waste removal roller. The conveyor belt is used to transport the scraped waste film to the recycling bin.

[0014] Furthermore, a traction roller, a slitting mechanism, and a pressure roller assembly are arranged along the transmission direction between the strip winding roller and the die-cutting mechanism; The slitting mechanism is used to slit the entire strip into multiple narrow strips.

[0015] The present invention also provides a control method for an intermittent die-cutting machine, applied to the intermittent die-cutting machine described above, comprising the following steps: The strip is introduced into the die-cutting mechanism via the front guide roller group, and then guided to the rear guide roller group. The strip is then wrapped around two traction rollers on the moving seat, with the wrapping directions of the strips on the two traction rollers being opposite. The strip moves along the normal conveying direction at the position of the die-cutting mechanism. The circular cutter of the die-cutting mechanism cuts the strip. At this time, the moving seat is driven to move towards the front guide roller group through the drive component. The strip is buffered between the rear guide roller group and the next traction roller. When the circular cutter rotates to face the strip, the moving seat is driven to move toward the rear guide roller group by the drive component. The buffer length of the strip between the front guide roller group and the previous traction roller increases, and the buffer length of the strip between the next traction roller and the rear guide roller group decreases. The strip moves in the opposite direction at the position of the die-cutting mechanism, so that the next die-cutting initial position of the die-cutting mechanism moves forward. When the cutting edge of the circular cutter rotates back to face the strip, repeat the above steps to achieve intermittent die-cutting of the strip.

[0016] The technical solution of this invention can achieve the following technical effects: This invention uses the movement of the moving buffer roller group to make the material strip intermittently reciprocate at the die-cutting mechanism, which effectively reduces the distance between two die-cuts and improves the utilization rate of the material strip. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an intermittent die-cutting machine; Figure 2 This is a front view of an intermittent die-cutting machine. Figure 3 This is a schematic diagram of the intermittent conveying mechanism; Figure 4 This is a schematic diagram of the moving seat in its initial position for obstacle avoidance. Figure 5 This is a schematic diagram of the movable seat in the initial position of the die-cutting process; Figure 6 This is a schematic diagram of the movement of the moving seat during die cutting; Figure 7 This is a schematic diagram of the drive component. Figure 8 This is a schematic diagram of the first structure of a waste film winding mechanism; Figure 9 This is a schematic diagram of the second structure of the waste film winding mechanism.

[0019] Reference numerals: 1. Unwinding roller; 2. Die-cutting mechanism; 3. Rewinding roller; 4. Waste film rewinding mechanism; 4a. Guide roller assembly; 4b. Waste film rewinding roller; 4c. Waste scraping roller; 4d. Conveyor belt; 5. Intermittent conveying mechanism; 51. Front guide roller assembly; 511. Reversing roller; 512. Guide roller; 52. Rear guide roller assembly; 53. Moving buffer roller assembly; 531. Moving seat; 532. Traction roller; 533. Drive assembly; 5331. Drive motor; 5332. Transmission mechanism; 534. Sliding guide; 6. Sensing assembly; 7. Traction roller; 8. Slitting mechanism; 9. Pressure roller assembly. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1-9 As shown, this application provides an intermittent die-cutting machine, including a strip unwinding roller 1, a die-cutting mechanism 2, a strip winding roller 3, and a waste film winding mechanism 4. The die-cutting machine also includes an intermittent conveying mechanism 5 arranged below the die-cutting mechanism 2. The intermittent conveying mechanism 5 includes a front guide roller group 51, a rear guide roller group 52, and a moving buffer roller group 53 located between the two; The movable buffer roller group 53 includes a movable seat 531, two traction rollers 532 arranged side by side on the movable seat 531, and a drive assembly 533; The strip material passing through the die-cutting mechanism 2 is introduced through the front guide roller group 51 and sent out through the rear guide roller group 52; the strip material entering the front guide roller group 51 and the rear guide roller group 52 are respectively wrapped around the corresponding traction rollers 532, and the wrapping direction of the strip material on the two traction rollers 532 is opposite. The drive assembly 533 drives the moving seat 531 to reciprocate along the conveying direction of the strip, thereby changing the buffer length of the strip at the front guide roller group 51 and the rear guide roller group 52, and thus changing the conveying direction of the strip at the position of the die-cutting mechanism 2. It should be noted that the conveying direction of the strip from the unwinding end to the winding end is taken as the front-back direction reference, the direction perpendicular to the horizontal plane is taken as the vertical reference, the side closer to the unwinding end of the strip is taken as the front side, and the side closer to the winding end of the strip is taken as the rear side.

[0023] In this embodiment, regarding the wrapping and engagement of the two traction rollers 532 with the material strip, the first traction roller 532 is positioned close to the front guide roller group 51, and the second traction roller 532 is positioned close to the rear guide roller group 52. After the material strip enters the front guide roller group 51, it wraps around the right side of the first traction roller 532, then extends horizontally to the discharge side of the front guide roller group 51, and is fed upward into the die-cutting mechanism 2. After being die-cut by the die-cutting mechanism 2, it is fed downward into the rear guide roller group 52, and continues to extend horizontally to the second traction roller 532, wrapping around the second traction roller 532 from the left side. Then, it is led out from the rear guide roller group 52 to the next process. Thus, the material strip entering the front guide roller group 51 and the material strip entering the rear guide roller group 52 both pass between the two traction rollers 532, and are wrapped on the first traction roller 532 in a right-side wrapping form, and on the second traction roller 532 in a left-side wrapping form. The wrapping directions of the material strip on the two traction rollers 532 are opposite.

[0024] During the die-cutting process, the die-cutting mechanism 2 adopts a circular cutter structure, with a cutting edge and a clearance position circumferentially arranged on the circular cutter. When the cutting edge of the circular cutter rotates to contact the material strip for die-cutting, the material strip moves forward along the normal conveying direction at the position of the die-cutting mechanism 2, and the circular cutter completes the die-cutting action on the material strip. At this time, the moving seat 531 drives the two traction rollers 532 to be on the side close to the front guide roller group 51.

[0025] When the circular cutter rotates to face the strip, the drive assembly 533 drives the moving seat 531 to move away from the front guide roller group 51. The buffer length of the strip between the front guide roller group 51 and the previous traction roller 532 increases, while the buffer length of the strip between the next traction roller 532 and the rear guide roller group 52 decreases. Since the wrapping direction of the strip on the two traction rollers 532 is opposite, the conveying direction of the strip at the position of the die-cutting mechanism 2 changes. The strip moves a small distance in the opposite direction, causing the next die-cutting initial position of the die-cutting mechanism 2 to shift forward, thereby reducing the gap between two die-cuts. When the cutting edge of the circular cutter rotates again to contact the strip for die cutting, the moving seat 531 simultaneously drives the two traction rollers 532 to move towards the front guide roller group 51. At this time, the die-cut strip is buffered between the next traction roller 532 and the rear guide roller group 52. When the circular cutter rotates to the avoidance position again, the above steps are repeated to realize intermittent die cutting.

[0026] The present invention enables the material strip to be intermittently reciprocated at the die-cutting mechanism 2 by moving the moving buffer roller group 53, which effectively reduces the gap between two die-cuts and improves the utilization rate of the material strip.

[0027] In this solution, the drive assembly 533 includes a drive motor 5331 and a transmission mechanism 5332; the transmission mechanism 5332 converts the rotational motion of the drive motor 5331 into the linear reciprocating motion of the moving seat 531.

[0028] Specifically, the transmission mechanism 5332 includes a driving roller and a driven roller. Both the driving and driven rollers are equipped with pulleys at both ends, and a conveyor belt is mounted on the two pulleys on the same side. A drive motor 5331 is connected to the driving roller to provide driving force. Two movable seats 531 are provided, located at both ends of the two traction rollers 532, and each movable seat 531 is connected to the conveyor belt on its corresponding side. In this preferred embodiment, for this technical feature of the transmission mechanism 5332, a screw-nut transmission mechanism 5332 or a gear and rack transmission mechanism 5332 can also be used. Of course, any mechanism that can convert the rotary motion of the drive motor 5331 into the linear reciprocating motion of the movable seat 531 is acceptable.

[0029] In operation, the drive motor 5331 receives a control signal and starts, driving the active roller to rotate forward or backward, and causing the driven roller to rotate synchronously via the conveyor belt. The movable seat 531 is fixed on the conveyor belt, which converts the rotational motion of the active roller into linear motion along the conveying direction of the conveyor belt. The conveyor belt drives the movable seat 531 to move back and forth, which in turn drives the two traction rollers 532 arranged side by side on the movable seat 531 to move back and forth synchronously along the conveying direction of the material belt, so as to change the buffer length of the material belt between the front guide roller group 51 and the rear guide roller group 52.

[0030] By controlling the rotation angle of the drive motor 5331, the travel and position of the moving seat 531 can be precisely controlled, ensuring the intermittent conveying accuracy of the strip at the position of the die-cutting mechanism 2, avoiding excessive or insufficient reverse movement distance of the strip, and ensuring the accuracy of the reduction in the gap between two die-cuts.

[0031] Based on the above scheme, preferably, a sliding guide 534 is provided under both movable seats 531.

[0032] Regarding the technical feature of the sliding guide 534, a slider and slide rod matching structure or a slide rail and slide groove matching structure can be selected. Of course, as long as the function of linear guidance of the moving seat 531 and reduction of frictional resistance can be achieved, it is acceptable. In practical applications, the slider and slide rod matching structure is preferred. Two sliders are symmetrically fixedly connected to the bottom sides of the moving seat 531, and two slide rods are fixedly installed on the frame along the conveying direction of the material belt. Each slider has a through hole that matches the corresponding slide rod. The slide rod passes through the through hole, and the slider slides with the slide rod through the through hole to ensure that the moving seat 531 moves back and forth strictly along the conveying direction of the material belt.

[0033] With this preferred solution, the movable seat 531 moves smoothly and without deviation under the guidance and constraint of the sliders and slide rods on both sides, effectively avoiding the problem of strip deviation or uneven tension caused by the deviation of the movable seat 531, and ensuring the accuracy of the strip conveying position of the die-cutting mechanism 2.

[0034] In this preferred embodiment, sensing components 6 are provided on the moving path of the movable seat 531, corresponding to the die-cutting position and the avoidance position of the circular cutter on the die-cutting mechanism 2.

[0035] The sensing component 6 is selected from proximity switches or photoelectric sensors. Two sensing components 6 are arranged at intervals on the moving path of the moving seat 531, corresponding to the die-cutting position and the avoidance position of the circular cutter, respectively. The sensing component 6 is electrically connected to the control system of the die-cutting machine.

[0036] In operation, the circular cutter rotates continuously. When the cutting edge of the circular cutter rotates to face the material strip, the control system, based on the die-cutting signal fed back by the circular cutter angle encoder, controls the drive assembly 533 to drive the moving seat 531 to move closer to the front guide roller group 51 until the sensing metal plate on the moving seat 531 triggers the proximity switch at the corresponding die-cutting position. The proximity switch feeds back a positioning signal to the control system, confirming that the moving seat 531 has reached the die-cutting position. The material strip moves forward along the normal conveying direction, and the circular cutter performs the die-cutting action. At this time, the die-cut material strip is buffered between the rear guide roller group 52 and the next traction roller 532, while the take-up shaft does not work. If the moving seat 531 is sensed by the proximity switch at the position of the front guide roller group 51 first, the moving seat 531 stops, but the circular cutter has not yet completed the die-cutting. To ensure the normal operation of the die-cutting, the take-up shaft starts the take-up operation to drive the material strip to continue conveying until this round of die-cutting is completed.

[0037] When the circular cutter rotates to face the material strip, the control system controls the drive assembly 533 to drive the moving seat 531 to move towards the rear guide roller group 52 according to the avoidance signal fed back by the angle encoder, until the sensing metal sheet triggers the proximity switch of the corresponding avoidance position. The proximity switch feeds back the position signal to the control system, and the control system confirms that the moving seat 531 has reached the avoidance position. At this time, the material strip has moved a small distance in the opposite direction, so that the next die-cutting initial position of the die-cutting mechanism 2 moves forward. During this process, the winding shaft is always in the winding state.

[0038] Through this preferred solution, the sensing component 6 achieves precise positioning of the moving seat 531 in the die-cutting position and the avoidance position, ensuring precise synchronization between the die-cutting action of the circular cutter and the intermittent conveying action of the material strip, avoiding collision interference between the cutting edge of the circular cutter and the material strip moving in the opposite direction, while ensuring the consistency of the material strip's reverse movement distance, so that the gap between two die-cuts is stably reduced, further reducing material strip waste.

[0039] In a preferred embodiment of the present invention, the movable seat 531 includes a bottom plate, a middle plate and a top plate from bottom to top; the conveyor belt is sandwiched between the bottom plate and the middle plate, and mounting holes for mounting two traction rollers 532 are formed on the opposite surfaces of the middle plate and the top plate.

[0040] In this preferred embodiment, the bottom plate is located at the bottom layer and is fixedly connected to the sliding guide 534. The middle plate is stacked and fixed above the bottom plate, and the top plate is stacked and fixed above the middle plate. A horizontal clamping gap is formed between the bottom plate and the middle plate. The conveyor belt of the transmission mechanism 5332 is horizontally inserted into the clamping gap and is fastened to the bottom plate or the middle plate by bolts to realize the rigid linkage between the conveyor belt and the moving seat 531. The upper surface of the middle plate and the lower surface of the top plate are arranged opposite each other, and semi-circular grooves are correspondingly opened on the opposite surfaces of the two plates. After the middle plate and the top plate are stacked, the two opposite semi-circular grooves are joined together to form two complete mounting holes. The two ends of the roller shafts of the two traction rollers 532 are supported in the corresponding mounting holes by bearings to realize the parallel installation of the two traction rollers 532.

[0041] Through this preferred embodiment, the three-layer composite structure conceals the conveyor belt of the transmission mechanism 5332 within the clamping gap between the bottom plate and the middle plate, preventing the conveyor belt from being exposed to die-cutting waste or dust contamination, and extending the service life of the transmission mechanism 5332; the mounting hole formed by the splicing of the middle plate and the top plate provides a stable rotational support for the traction roller 532, ensuring that the traction roller 532 maintains a stable position during high-speed rotation and reciprocating movement with the moving seat 531, and preventing the traction roller 532 from shifting, which would cause uneven tension or deviation of the material belt; the overall structure is arranged in a flat vertical direction, occupying little space, and providing a compact structural solution for the limited installation space below the die-cutting mechanism 2.

[0042] In this preferred embodiment, both the front guide roller group 51 and the rear guide roller group 52 include a reversing roller 511 and two guide rollers 512; the two guide rollers 512 are arranged vertically, and the bottom traction surface of the lower guide roller 512 is on the same horizontal plane as the bottom traction surface of the traction roller 532; the bottom traction surface of the reversing roller 511 and the top traction surface of the traction roller 532 are on the same horizontal plane.

[0043] In operation, the strip is introduced into the front guide roller group 51 from the unwinding end, first wrapping around the two guide rollers 512 of the front guide roller group 51 in an S-shape, and then horizontally pulled forward from the lower guide roller 512. Because the bottom traction surface of the lower guide roller 512 is on the same horizontal plane as the bottom traction surface of the previous traction roller 532, the strip enters the bottom of the previous traction roller 532 horizontally without bending and wraps around the previous traction roller 532. After wrapping, the strip is horizontally pulled backward from the top of the previous traction roller 532. Because the top traction surface of the previous traction roller 532 is on the same horizontal plane as the bottom traction surface of the reversing roller 511, the strip enters the bottom of the reversing roller 511 horizontally without bending. After being guided by the reversing roller 511, it enters the die-cutting mechanism 2 horizontally to complete the die-cutting process.

[0044] The strip processed by the die-cutting mechanism 2 is horizontally drawn out from the die-cutting mechanism 2 and enters the bottom of the reversing roller 511 of the rear guide roller group 52. Since the bottom traction surface of the reversing roller 511 is on the same horizontal plane as the top traction surface of the rear traction roller 532, the strip enters the top of the rear traction roller 532 horizontally without bending and wraps around the rear traction roller 532. After wrapping, the strip is horizontally drawn out from the bottom of the rear traction roller 532. Since the bottom traction surface of the rear traction roller 532 is on the same horizontal plane as the bottom traction surface of the lower guide roller 512 in the rear guide roller group 52, the strip enters the lower guide roller 512 horizontally without bending, and then wraps around the two guide rollers 512 of the rear guide roller group 52 in an S-shape, and finally leads to the winding end downstream of the rear guide roller group 52.

[0045] With this preferred embodiment, the front guide roller group 51 and the rear guide roller group 52 are arranged such that the bottom of the lower guide roller 512 is at the same height as the bottom of the traction roller 532, and the top of the reversing roller 511 is at the same height as the top of the traction roller 532. This ensures that the material strip remains horizontal and straight when entering and exiting the two traction rollers 532, avoiding surface friction damage and tension changes caused by bending the material strip up and down. This ensures that the tension of the material strip is stable and the operation is smooth during intermittent conveying, thereby ensuring the die-cutting accuracy of the die-cutting mechanism 2 on the material strip, while reducing scratches on the surface of the material strip and improving the quality of the finished product.

[0046] As a further optimization of the above embodiment, the waste film winding mechanism 4 includes a paper guide roller group 4a and a waste film winding roller 4b; the paper guide roller group 4a is disposed at the discharge end of the die-cutting mechanism 2 and is used to pull the die-cut waste film to the waste film winding roller 4b.

[0047] During the die-cutting process, after the die-cutting mechanism 2 cuts the material strip, the finished material strip continues to be conveyed forward along the normal conveying direction, while the waste film separates from the finished material strip at the die-cutting position. The separated waste film is first conveyed upward to the guide roller group 4a, and then wrapped around the three guide rollers in an S-shape. The guide roller group 4a provides guidance and tension to the waste film through rolling contact, so that the waste film is smoothly conveyed backward along the predetermined path. Finally, it is wound up by the waste film winding roller 4b. The winding motor drives the waste film winding roller 4b to rotate at a uniform speed to maintain stable tension of the waste film and avoid loose accumulation of waste film.

[0048] In this preferred embodiment, the guide roller assembly 4a is located at the discharge end of the die-cutting mechanism 2, which promptly guides the waste film separated after die-cutting from the die-cutting area, preventing the waste film from accumulating and tangling in the die-cutting mechanism 2 and affecting normal die-cutting operations. At the same time, the waste film is automatically and continuously wound up by the waste film winding roller 4b, so that the waste film is completely separated from the finished product strip and recycled separately. There is no need for frequent manual cleaning of waste film, which greatly reduces the intensity of manual labor and improves the automation level and production continuity of the die-cutting machine.

[0049] As another preferred embodiment, the waste film winding mechanism 4 includes a waste scraping roller 4c and a conveyor belt 4d; the waste scraping roller 4c is provided with a scraper on one side of the conveyor belt 4d, and the scraper is used to scrape off the waste film that is pasted and wrapped on the waste scraping roller 4c; the conveyor belt 4d is used to transport the scraped waste film to the recycling bin.

[0050] In this scheme, a fixed shovel is selected. The waste shovel roller 4c is installed on the frame through a bearing seat. The waste shovel roller 4c is connected to the rotary drive component. The shovel is fixedly installed on the frame on one side of the waste shovel roller 4c. The blade of the shovel maintains a small gap with the outer circumference of the waste shovel roller 4c. The conveyor belt 4d is arranged below the shovel, and the end of the conveyor belt 4d corresponds to the recycling box.

[0051] Through this preferred solution, the waste removal roller 4c and the scraper work together to achieve automatic and continuous removal of waste film. The conveyor belt 4d promptly transports the removed waste film to the recycling bin, eliminating the need for manual cleaning and significantly improving the automation level and continuous operation capability of the die-cutting machine. At the same time, it reduces the risk of equipment failure caused by the accumulation of waste film.

[0052] In this embodiment, a traction roller 7, a slitting mechanism 8, and a pressure roller assembly 9 are arranged between the strip winding roller 3 and the die-cutting mechanism 2 along the transmission direction; the slitting mechanism 8 is used to cut the entire strip into multiple narrow strips.

[0053] During the die-cutting process, the entire strip of material, after being die-cut by the die-cutting mechanism 2, first enters the clamping gap between the upper and lower rollers of the traction roller 7. The traction motor drives the lower roller to rotate, and the upper roller rotates synchronously under friction. The traction roller 7 provides forward traction force to the strip through elastic clamping, so that the strip is conveyed to the slitting mechanism 8 with stable tension, avoiding loose accumulation of the strip between the die-cutting mechanism 2 and the slitting mechanism 8. After the entire strip of material enters the slitting mechanism 8, the slitting motor drives the cutter shaft to drive multiple circular cutters to rotate synchronously. The blades of the circular cutters cut into the strip, evenly cutting the entire strip of material into multiple narrow strips of equal width along the longitudinal direction. The multiple narrow strips after slitting enter the pressing gap between the pressure roller and the support roller of the pressure roller assembly 9. The pressure roller presses each narrow strip flat, eliminating edge burrs and warping deformation generated during the slitting process. Subsequently, each narrow strip is wound up separately or jointly by the strip winding roller 3.

[0054] As a preferred structure in this solution, the strip take-up roller 3 uses a single roller for direct winding. Specifically, the strip take-up roller includes a single winding spindle and a winding drive component. The winding spindle is mounted on the frame via a bearing housing, and one end of the winding spindle is connected to the winding drive component. A core is sleeved on the winding spindle. This single-roller direct winding method has a simple structure, low equipment cost, and convenient operation and maintenance. It is suitable for scenarios with large core sizes and large single winding volumes. For example, when using 3-inch cores for winding, manual unloading after full material loading can meet production needs.

[0055] As another preferred method, the strip take-up roller 3 uses AB axis switching for take-up. Specifically, the strip take-up roller includes an A-axis take-up assembly, a B-axis take-up assembly, and a switching mechanism. The A-axis take-up assembly and the B-axis take-up assembly are arranged side by side on the frame. The switching mechanism is used to drive the A-axis take-up assembly and the B-axis take-up assembly to alternately enter the working position. Both the A-axis take-up assembly and the B-axis take-up assembly include a take-up shaft and a take-up drive component. A core is sleeved on the take-up shaft. During operation, when the A-axis take-up assembly is in the working position for take-up, the B-axis take-up assembly is in the standby position for material preparation. The operator pre-installs the core on the take-up shaft of the B-axis take-up assembly. When the material roll on the A-axis take-up assembly reaches the preset full size, the switching mechanism drives the A-axis take-up assembly to exit the working position and simultaneously drives the B-axis take-up assembly to enter the working position. The B-axis take-up assembly immediately continues take-up, and the full material roll on the A-axis take-up assembly is unloaded by the operator, realizing material exchange. This AB axis switching rewinding method can complete the roll change without interrupting the operation of the whole machine, ensuring continuous operation of the die-cutting machine, reducing downtime and waiting time, and improving production efficiency. It is suitable for scenarios with small core size and high roll change frequency. For example, when using 1-inch core for rewinding, the AB axis can be used to switch the replacement rolls to achieve continuous production without stopping the machine.

[0056] This invention also provides a control method for an intermittent die-cutting machine, applicable to an intermittent die-cutting machine, comprising the following steps: The strip is introduced into the die-cutting mechanism 2 via the front guide roller group 51, and then guided to the rear guide roller group 52. The strip is then wrapped around the two traction rollers 532 on the movable seat 531, with the wrapping directions of the strip on the two traction rollers 532 being opposite. The strip moves along the normal conveying direction at the position of the die-cutting mechanism 2. The circular cutter of the die-cutting mechanism 2 cuts the strip. At this time, the moving seat 531 is driven to move toward the front guide roller group 51 by the drive component 533. The strip is buffered between the rear guide roller group 52 and the next traction roller 532. When the circular cutter rotates to face the strip, the moving seat 531 is driven to move toward the rear guide roller group 52 by the drive assembly 533. The buffer length of the strip between the front guide roller group 51 and the previous traction roller 532 increases, and the buffer length between the next traction roller 532 and the rear guide roller group 52 decreases. The strip moves in the opposite direction at the position of the die-cutting mechanism 2, so that the next die-cutting initial position of the die-cutting mechanism 2 moves forward. When the cutting edge of the circular cutter rotates back to face the strip, repeat the above steps to achieve intermittent die-cutting of the strip.

[0057] Through the above steps, intermittent reciprocating conveying of the material strip at the die-cutting mechanism 2 can be achieved, reducing the gap between two die-cuts and reducing material strip waste.

[0058] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. An intermittent die-cutting machine, comprising a strip unwinding roller, a die-cutting mechanism, a strip take-up roller, and a waste film take-up mechanism, characterized in that, It also includes an intermittent conveying mechanism arranged below the die-cutting mechanism; The intermittent conveying mechanism includes a front guide roller group, a rear guide roller group, and a movable buffer roller group located between the two. The movable buffer roller assembly includes a movable base, two traction rollers arranged side by side on the movable base, and a drive assembly; The material strips entering the front guide roller group and the rear guide roller group are respectively wrapped around the traction rollers on the corresponding sides, and the wrapping directions of the material strips on the two traction rollers are opposite. The drive assembly drives the moving seat to reciprocate, thereby changing the buffer length of the strip at the front guide roller group and the rear guide roller group, and thus changing the conveying direction of the strip at the position of the die-cutting mechanism.

2. The intermittent die-cutting machine according to claim 1, characterized in that, The drive assembly includes a drive motor and a transmission mechanism; The transmission mechanism converts the rotational motion of the drive motor into the linear reciprocating motion of the moving seat.

3. The intermittent die-cutting machine according to claim 2, characterized in that, Sliding guides are provided below both of the movable seats.

4. The intermittent die-cutting machine according to claim 3, characterized in that, Along the moving path of the movable seat, sensing components are provided corresponding to the die-cutting position and the avoidance position of the circular cutter on the die-cutting mechanism.

5. The intermittent die-cutting machine according to claim 2, characterized in that, The movable base comprises, from bottom to top, a base plate, a middle plate, and a top plate; The transmission mechanism is disposed between the bottom plate and the middle plate, and mounting holes for mounting the two traction rollers are formed on the opposite surfaces of the middle plate and the top plate.

6. The intermittent die-cutting machine according to claim 1, characterized in that, Both the front guide roller group and the rear guide roller group include a reversing roller and two guide rollers; The two guide rollers are arranged vertically, with the lower guide roller and the bottom traction surface of the traction roller on the same horizontal plane. The bottom traction surface of the reversing roller and the top traction surface of the traction roller are located on the same horizontal plane.

7. The intermittent die-cutting machine according to claim 1, characterized in that, The waste film winding mechanism includes a paper guide roller assembly and a waste film winding roller. The paper guide roller assembly is located at the discharge end of the die-cutting mechanism and is used to guide the die-cut waste film to the waste film take-up roller.

8. The intermittent die-cutting machine according to claim 1, characterized in that, The waste film winding mechanism includes a waste scraping roller and a conveyor belt; The waste removal roller is equipped with a scraper on one side of the conveyor belt. The scraper is used to remove the waste film that is stuck to or wrapped around the waste removal roller. The conveyor belt is used to transport the scraped waste film to the recycling bin.

9. The intermittent die-cutting machine according to claim 1, characterized in that, Between the strip take-up roller and the die-cutting mechanism, a traction roller, a slitting mechanism and a pressure roller assembly are arranged along the transmission direction; The slitting mechanism is used to slit the entire strip into multiple narrow strips.

10. A control method for an intermittent die-cutting machine, applied to the intermittent die-cutting machine as described in any one of claims 1-9, characterized in that, Includes the following steps: The strip is introduced into the die-cutting mechanism via the front guide roller group, and then guided to the rear guide roller group. The strip is then wrapped around two traction rollers on the moving seat, with the wrapping directions of the strips on the two traction rollers being opposite. The strip moves along the normal conveying direction at the position of the die-cutting mechanism. The circular cutter of the die-cutting mechanism cuts the strip. At this time, the moving seat is driven to move towards the front guide roller group through the drive component. The strip is buffered between the rear guide roller group and the next traction roller. When the circular cutter rotates to face the strip, the moving seat is driven to move toward the rear guide roller group by the drive component. The buffer length of the strip between the front guide roller group and the previous traction roller increases, and the buffer length of the strip between the next traction roller and the rear guide roller group decreases. The strip moves in the opposite direction at the position of the die-cutting mechanism, so that the next die-cutting initial position of the die-cutting mechanism moves forward. When the cutting edge of the circular cutter rotates back to face the strip, repeat the above steps to achieve intermittent die-cutting of the strip.

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