A flat-to-flat die cutting machine on-line material storage feeding device

Abstract

The present application relates to the technical field of packaging printing equipment, in particular to a flat press flat die cutting machine continuous line material storage feeding device, which comprises a rack, a swing roller and two parallel reversing rollers, the rack comprises opposite vertical plates, the reversing rollers are horizontally arranged, both ends of the reversing rollers are rotationally connected with the rack, the swing roller is located between the two reversing rollers, an eccentric shaft hole is arranged on the swing roller, the shaft hole is parallel to the axis of the swing roller, the swing roller is rotationally connected with the rack through a rotating shaft group arranged in the shaft hole, a driving member for driving the swing roller to rotate around the axis of the shaft hole is arranged on the rack, and the axis of the shaft hole is parallel to the axis of the reversing roller. The device can always make the paper tape bear a certain tension during the paper cutting of the flat press flat die cutting machine, so as to prevent the deformation of the pattern on the paper tape caused by the excessive change of the tension of the paper tape.

Description

Technical Field

[0001] This invention relates to the field of packaging and printing equipment technology, specifically to a material storage and feeding device for a flatbed die-cutting machine. Background Technology

[0002] In the packaging and printing industry, flatbed die-cutting machines are used to die-cut packaging paper with composite patterns to obtain individual packaging paper. When the flatbed die-cutting machine cuts long paper strips, the traction roller group in front of the die-cutting platform first pulls the paper strip to the die-cutting platform and after it reaches the correct position, the traction roller group stops rotating to keep the paper strip stationary on the die-cutting platform to wait for cutting. At this time, the paper strip behind is continuously transported to the die-cutting platform and accumulates, which will cause paper accumulation and the paper strip tension to disappear. The paper strip suddenly goes from a taut state to a tensionless state, which will cause the paper strip to deform and the pattern on the paper strip to be deformed, resulting in the scrap of the die-cut finished product. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a material storage and feeding device for a flatbed die-cutting machine, so as to solve the problem of paper tape accumulation and loss of paper tape tension during cutting of existing flatbed die-cutting machines, which causes pattern deformation.

[0004] To solve the above-mentioned technical problems, the present invention provides a material storage and feeding device for a flatbed die-cutting machine, comprising a frame, a swing roller, and two parallel reversing rollers. The frame includes opposing vertical plates. The reversing rollers are horizontally arranged, and both ends of the reversing rollers are rotatably connected to the vertical plates of the frame. The swing roller is located between the two reversing rollers. An eccentric shaft hole is provided on the swing roller, and the shaft hole is parallel to the axis of the swing roller. The swing roller is rotatably connected to the frame through a rotating shaft assembly disposed in the shaft hole. A driving component is provided on the frame to drive the swing roller to rotate around the axis of the shaft hole, and the axis of the shaft hole is parallel to the axis of the reversing rollers.

[0005] With the above setup, the paper tape sequentially passes around the reversing roller, the swing roller, and then passes over the die-cutting platform surface before connecting to the traction roller group located in front of the die-cutting platform for pulling the paper tape. The traction roller group rotates intermittently, causing the moving paper tape to pause briefly on the die-cutting platform so that the die cuts off the pattern on the paper tape. The setup is such that when the traction roller group stops rotating to pull the paper tape, the generatrix furthest from the shaft hole on the swing roller's cylindrical surface (called the farthest generatrix) is exactly above the shaft hole. At this time, the length of the paper tape between the two reversing rollers adjacent to the swing roller is the shortest. When the traction roller group stops pulling the paper tape, the flatbed die-cutting machine completes one paper cutting operation. During the period when the oscillating roller rotates around the axis of the shaft hole under the drive of the drive component, the far point generatrix rotates from directly above the shaft hole to directly below the shaft hole. When the far point generatrix of the oscillating roller is directly below the shaft hole, the paper strip length between the two reversing rollers adjacent to the oscillating roller is the longest. Therefore, when the traction roller group stops traction of the paper strip and allows the flatbed die-cutting machine to complete one paper cutting action, the length of the paper strip between the two reversing rollers adjacent to the oscillating roller gradually increases from the shortest to the longest as the oscillating roller rotates. This allows the paper strip to be stored between the two reversing rollers adjacent to the oscillating roller and the paper strip to always maintain contact with the cylindrical surface of the oscillating roller, so that the paper strip maintains a certain tension.

[0006] When the flatbed die-cutting machine completes one paper cutting operation and resets, the traction roller group then rotates to pull the paper strip into the cutting position and keeps it stationary. During the rotation of the traction roller group, the far point generatrix of the oscillating roller rotates from the bottom of the shaft hole to the top of the shaft hole, causing the length of the paper strip between the two reversing rollers adjacent to the oscillating roller to gradually decrease from its longest to its shortest as the oscillating roller rotates. This releases the paper strip stored between the two reversing rollers. The above actions are repeated throughout the paper cutting and traction process of the flatbed die-cutting machine.

[0007] In the above scheme, the operating frequency of the traction roller group can be met by reasonably setting the diameter of the swing roller, the eccentricity of the shaft hole and the rotation speed of the swing roller, so as to ensure that the paper strip is always under a certain tension when the flatbed die-cutting machine cuts paper to prevent the paper strip tension from changing too much and causing the pattern on the paper strip to deform.

[0008] Furthermore, the rotating shaft assembly includes a rotating shaft and a fixed shaft coaxially arranged. The first end of the rotating shaft is rotatably connected to a vertical plate of the frame. A rounded protrusion that mates with the shaft hole is provided on the rotating shaft near the first end. The rounded protrusion is keyed to the shaft hole. The driving component is a drive motor, which is fixedly connected to the vertical plate where the first end of the rotating shaft is located. The output shaft of the drive motor is coaxially fixedly connected to the first end of the rotating shaft. The fixed shaft is fixedly connected to another vertical plate of the frame. The first end of the fixed shaft faces the rotating shaft. The first end of the fixed shaft has a hollow portion with a diameter larger than the diameter of the rotating shaft. The rounded protrusion is provided with a structure to hold the hollow portion... An air inlet is provided in the hollow part, which is connected to the external space of the rotating shaft. The second end of the rotating shaft extends into the hollow part and is rotatably connected to the second end of the fixed shaft. The first end of the fixed shaft is inserted into the round protrusion and is rotatably connected to the round protrusion. An impeller is fixedly connected to the rotating shaft located inside the hollow part. The impeller is located near the first end of the rotating shaft. The outer wall of the fixed shaft is rotatably connected to the inner wall of the shaft hole in a sealed manner. The fixed shaft is provided with a plurality of exhaust holes that connect the inner cavity of the hollow part to the external space of the hollow part. A plurality of vent holes that penetrate the oscillating roller are evenly distributed radially along the shaft hole. When the oscillating roller rotates at a certain angle, the vent holes are connected to the exhaust holes.

[0009] Furthermore, the inner wall of the swing roller that mates with the round protrusion is provided with an internal spline, and the round protrusion is provided with an external spline that mates with the internal spline on the swing roller.

[0010] Furthermore, the exhaust port is located on the lower side wall of the fixed shaft. Since the paper tape only contacts the lower outer wall of the oscillating roller when the oscillating roller rotates, the exhaust port is located on the lower side wall of the fixed shaft, so that the high-pressure gas generated by the impeller can only be released through the lower outer wall of the oscillating roller, and the high-pressure gas generated by the rotation of the impeller can act on the paper tape.

[0011] Furthermore, a transverse groove corresponding to the vent hole is recessed on the outer wall of the oscillating roller. The transverse groove is arranged in a direction parallel to the axis of the oscillating roller, and the length of the transverse groove is less than the width of the paper strip.

[0012] No matter what angle the oscillating roller rotates to, the paper strip is always in contact with the lower outer wall of the oscillating roller. At this time, the paper strip can seal the opening of the transverse groove on the lower outer wall of the oscillating roller. The high-pressure gas generated by the impeller rotation enters the transverse groove through the exhaust hole and then through the vent hole, and then is released between the paper strip and the outer wall of the oscillating roller, so that a certain gap is generated between the paper strip and the outer wall of the oscillating roller. This reduces the friction between the paper strip and the oscillating roller, lowers the surface temperature of the oscillating roller, and prevents the paper from deforming due to the increased surface temperature of the oscillating roller caused by long-term friction between the oscillating roller and the paper strip. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a structural schematic diagram of the shaft hole from one view.

[0016] Figure 3 This is a structural schematic diagram from another view of the shaft hole.

[0017] Figure 4 This is a schematic diagram of the structure of the present invention in one operating state.

[0018] The meanings of the labels in the attached diagram are as follows:

[0019] Frame-10; First vertical plate-101; Second vertical plate-102; Swing roller-20; Shaft hole-201; Vent hole-202; Horizontal groove-203; Reversing roller-30; Rotating shaft-40; Round protrusion-401; Impeller-402; Air inlet-403; Fixed shaft-50; Hollow part-501; Exhaust hole-502; Drive motor-601; Paper tape-602; Traction roller group-603; Die-cutting platform-604. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0022] This embodiment provides a material storage and feeding device for a flatbed die-cutting machine, such as... Figures 1-4 As shown, it includes a frame 10, a swing roller 20, and two parallel reversing rollers 30.

[0023] The frame 10 includes a first vertical plate 101 and a second vertical plate 102 arranged opposite to each other. A reversing roller 30 is arranged horizontally, and both ends of the reversing roller 30 are rotatably connected to the vertical plate of the frame 10. A swing roller 20 is located between the two reversing rollers 30. A shaft hole 201 is eccentrically provided on the swing roller 20. The shaft hole 201 is parallel to the axis of the swing roller 20. The swing roller 20 is rotatably connected to the frame 10 through a rotating shaft assembly provided in the shaft hole 201. A driving member is provided on the frame 10 to drive the swing roller 20 to rotate around the axis of the shaft hole 201. The axis of the shaft hole 201 is parallel to the axis of the reversing roller 30.

[0024] The rotating shaft assembly includes a rotating shaft 40 and a fixed shaft 50 coaxially arranged. The first end of the rotating shaft 40 is rotatably connected to the first vertical plate 101 of the frame 10. A cylindrical protrusion 401 that mates with the shaft hole 201 is integrally formed on the rotating shaft 40 near the first end of the rotating shaft 40. The protrusion 401 is keyed to the shaft hole 201. Specifically, an internal spline is provided on the inner wall of the swing roller 20 that mates with the protrusion 401, and an external spline is provided on the protrusion 401 that mates with the internal spline on the swing roller 20.

[0025] The driving component is a drive motor 601, which is configured as a servo motor. The drive motor 601 is externally powered and equipped with a controller to control its operating state. The drive motor 601 is fixedly connected to the first vertical plate 101. The output shaft of the drive motor 601 is coaxially and fixedly connected to the first end of the rotating shaft 40. The fixed shaft 50 is fixedly connected to the second vertical plate 102 on the frame 10. The first end of the fixed shaft 50 faces the rotating shaft 40. The first end of the fixed shaft 50 has a hollow portion 501, which is a circular hole extending through the first end of the fixed shaft 50 along its axis. The diameter of the hollow portion 501 is larger than the diameter of the rotating shaft 40. Figure 2 As shown, the circular protrusion 401 is provided with an air inlet 403 that connects the hollow part 501 with the external space of the rotating shaft 40.

[0026] The second end of the rotating shaft 40 extends into the hollow part 501 and is rotatably connected to the second end of the fixed shaft 50. The round protrusion 401 is provided with an annular groove 404 that mates with the first end of the fixed shaft 50 on its end face near the fixed shaft 50. The first end of the fixed shaft 50 is inserted into the annular groove 404 on the round protrusion 401 so that the first end of the fixed shaft 50 is rotatably connected to the round protrusion 401.

[0027] like Figures 2-3As shown, an impeller 402 is fixedly connected to a rotating shaft 40 located inside the hollow part 501. The impeller 402 is located near the first end of the rotating shaft 40. The outer wall of the fixed shaft 50 is rotatably connected to the inner wall of the shaft hole 201. The fixed shaft 50 is provided with a plurality of exhaust holes 502 that connect the inner cavity of the hollow part 501 with the external space of the hollow part 501. The oscillating roller 20 is provided with a plurality of vent holes 202 that are radially distributed along the shaft hole 201 and pass through the oscillating roller 20. When the oscillating roller 20 rotates at a certain angle, the vent holes 202 are connected to the exhaust holes 502.

[0028] The exhaust port 502 is located on the lower side wall of the fixed shaft 50. Since the paper tape 602 only contacts the lower outer wall of the oscillating roller 20 when the oscillating roller 20 rotates, the exhaust port 502 is located on the lower side wall of the fixed shaft 50, so that the high pressure gas generated by the impeller 402 can only be released through the lower outer wall of the oscillating roller 20, and so that the high pressure gas generated by the rotation of the impeller 402 can act on the paper tape 602.

[0029] Furthermore, a transverse groove 203 corresponding to the vent hole 202 is recessed on the outer wall of the oscillating roller 20. The transverse groove 203 is arranged in a direction parallel to the axis of the oscillating roller 20, and the length of the transverse groove 203 is less than the width of the paper strip 602.

[0030] The working principle and beneficial effects of this solution are as follows:

[0031] In the above configuration, the paper tape 602 sequentially passes around the reversing roller 30, the swing roller 20, and then passes through the surface of the die-cutting platform 604 before connecting to the traction roller group 603 located in front of the die-cutting platform 604 for pulling the paper tape 602. The traction roller group 603 rotates intermittently, causing the moving paper tape 602 to pause briefly on the die-cutting platform 604 so that the die cuts off the pattern on the paper tape 602. Figure 1 As shown, when the traction roller group 603 stops rotating to pull the paper tape 602, the generatrix (called the farthest generatrix) on the cylindrical surface of the swing roller 20 is located directly above the shaft hole 201. At this time, the length of the paper tape 602 between the two reversing rollers 30 adjacent to the swing roller 20 is the shortest.

[0032] When the traction roller group 603 stops traction of the paper belt 602, allowing the flatbed die-cutting machine to complete one paper cutting action, the oscillating roller 20, driven by the drive motor 601, rotates around the axis of the shaft hole 201, causing the far-point generatrix to rotate from directly above the shaft hole 201 to directly below it. For example... Figure 4As shown, when the far point generatrix of the oscillating roller 20 is directly below the shaft hole 201, the length of the paper strip 602 between the two reversing rollers 30 adjacent to the oscillating roller 20 is the longest. Therefore, when the traction roller group 603 stops traction of the paper strip 602 and allows the flatbed die-cutting machine to complete one paper cutting action, the length of the paper strip 602 between the two reversing rollers 30 adjacent to the oscillating roller 20 gradually increases from the shortest to the longest as the oscillating roller 20 rotates. This allows the paper strip 602 to be stored between the two reversing rollers 30 adjacent to the oscillating roller 20, and the paper strip 602 always maintains contact with the cylindrical surface of the oscillating roller 20, so that the paper strip 602 maintains a certain tension.

[0033] When the flatbed die-cutting machine completes one paper cutting action and resets, the traction roller group 603 then rotates to pull the paper strip 602, positioning it in the cutting position and keeping it stationary. During the rotation of the traction roller group 603, the far-point generatrix of the swing roller 20 rotates from the lowermost point of the shaft hole 201 to the uppermost point, causing the length of the paper strip 602 between the two reversing rollers 30 adjacent to the swing roller 20 to gradually decrease from its longest to its shortest as the swing roller 20 rotates. This releases the paper strip 602 stored between the two reversing rollers 30. The above actions are repeated throughout the paper cutting and pulling process of the flatbed die-cutting machine.

[0034] When the drive motor 601 drives the oscillating roller 20 to rotate rapidly to store and release the paper tape 602, the impeller 402 on the rotating shaft 40 rotates to generate high-pressure gas. External air enters the hollow part 501 through the air inlet 403 to replenish the gas in the hollow part 501. As the oscillating roller 20 rotates, when the vent hole 202 on the oscillating roller 20 rotates to the lower part of the oscillating roller 20, the vent hole 202 on the oscillating roller 20 connects with the exhaust hole 502 on the fixed shaft 50. The gas in the hollow part 501 is discharged through the exhaust hole 502 and then through the vent hole 202. Regardless of the angle at which the oscillating roller 20 rotates, the paper strip 602 always contacts the lower outer wall of the oscillating roller 20. At this time, the paper strip 602 can seal the opening of the transverse groove 203 on the lower outer wall of the oscillating roller 20. The high-pressure gas generated by the rotation of the impeller 402 enters the transverse groove 203 through the exhaust hole 502 and then through the vent hole 202, and then leaks out between the paper strip 602 and the outer wall of the oscillating roller 20, so that a certain gap is generated between the paper strip 602 and the outer wall of the oscillating roller 20. This reduces the friction between the paper strip 602 and the oscillating roller 20, lowers the surface temperature of the oscillating roller 20, and further prevents the paper from deforming due to the increased surface temperature of the oscillating roller 20 caused by long-term friction between the oscillating roller 20 and the paper strip 602.

[0035] In the above scheme, the operating frequency of the traction roller group 603 and the length of the paper strip 602 pulled each time can be satisfied by reasonably setting the diameter of the swing roller 20, the eccentricity of the shaft hole 201 and the rotation speed of the swing roller 20, so as to ensure that the paper strip 602 is always under a certain tension when the flatbed die-cutting machine cuts the paper to prevent the tension of the paper strip 602 from changing too much and causing the pattern on the paper strip 602 to deform.

[0036] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A material storage and feeding device for a flatbed die-cutting machine, characterized in that: The device includes a frame, a swing roller, and two parallel reversing rollers. The frame includes opposing vertical plates. The reversing rollers are horizontally positioned, with both ends rotatably connected to the frame. The swing roller is located between the two reversing rollers. An eccentric shaft hole is provided on the swing roller, and the shaft hole is parallel to the axis of the swing roller. The swing roller is rotatably connected to the frame via a rotating shaft assembly disposed within the shaft hole. A driving component is provided on the frame to drive the swing roller to rotate around the axis of the shaft hole, and the axis of the shaft hole is parallel to the axis of the reversing roller. The rotating shaft assembly includes a rotating shaft and a fixed shaft arranged coaxially. The first end of the rotating shaft is rotatably connected to a vertical plate of the frame. A round protrusion that mates with the shaft hole is provided on the rotating shaft near the first end. The round protrusion is keyed to the shaft hole. The driving component is a drive motor, which is fixedly connected to the vertical plate where the first end of the rotating shaft is located, and the output shaft of the drive motor is fixedly connected to the first end of the rotating shaft coaxially. The fixed shaft is fixedly connected to another vertical plate of the frame. The first end of the fixed shaft faces the rotating shaft. The first end of the fixed shaft is provided with a hollow part. The diameter of the hollow part is larger than the diameter of the rotating shaft. The round protrusion is provided with an air inlet that connects the hollow part with the external space of the rotating shaft. The second end of the rotating shaft extends into the hollow part and is rotatably connected to the second end of the fixed shaft. The first end of the fixed shaft is inserted into the round protrusion and is rotatably connected to the round protrusion. An impeller is fixedly connected to a rotating shaft located within the hollow section. The impeller is positioned near the first end of the rotating shaft. The outer wall of the fixed shaft is rotatably and sealingly connected to the inner wall of the shaft hole. The fixed shaft is provided with multiple vent holes that connect the inner cavity of the hollow section to the external space of the hollow section. Multiple vent holes that penetrate the oscillating roller are evenly distributed radially along the shaft hole on the oscillating roller. When the oscillating roller rotates at a certain angle, the vent holes communicate with the exhaust holes.

2. The material storage and feeding device for a flatbed die-cutting machine as described in claim 1, characterized in that: The inner wall of the swing roller that mates with the round protrusion is provided with an internal spline, and the round protrusion is provided with an external spline that mates with the internal spline on the swing roller.

3. The material storage and feeding device for a flatbed die-cutting machine as described in claim 2, characterized in that: The vent is located on the lower side wall of the fixed shaft.

4. The material storage and feeding device for a flatbed die-cutting machine as described in claim 3, characterized in that: A transverse groove corresponding to the vent hole is recessed on the outer wall of the oscillating roller. The transverse groove is arranged in a direction parallel to the axis of the oscillating roller, and the length of the transverse groove is less than the width of the paper strip.

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