UV curing device of cold stamping printing machine

Abstract

The utility model provides a UV curing device of a cold stamping printing machine, which comprises a rack, a UV lamp, a conveying belt and a plurality of conveying rollers, the conveying rollers are rotatably connected on the rack, the conveying belt is tensioned through the plurality of conveying rollers, the UV lamp is arranged in the rack and is opposite to the conveying belt, a support frame is fixedly connected in the rack, and the support frame is fixedly connected with the UV lamp. A vertical driving motor is fixedly connected to the machine frame, a supporting plate is slidably connected to the supporting frame in the height direction, the UV lamp is connected to the supporting plate, the supporting plate stretches across the conveying belt, an adjusting hole is formed in the supporting plate, an adjusting rod is connected to a power shaft of the vertical driving motor, and the adjusting rod is in threaded connection with the interior of the adjusting hole. And the purpose of improving practicability is achieved.

Description

Technical Field

[0001] The utility model relates to a cold stamping printing machine, in particular to a UV curing device of the cold stamping printing machine. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN205344064U discloses an intermittent flexographic cold stamping press, including a reeling component, a primary floating storage roller, a secondary floating storage roller, a front traction component, a flexographic printing unit, a rear traction component, a paper receiving box and a reeling component which are sequentially arranged in front and back. The flexographic printing unit is provided with multiple groups, and a set of UV ovens is provided on the rear side of each flexographic printing unit. The plate cylinder of the flexographic printing unit is directly mounted on the frame wall panel, and the outer diameter of the plate cylinder remains fixed. During printing, the front traction roller of the front traction component is driven by the front servo motor to rotate forward and reversely for feeding and unfeeding paper, and the rear traction roller of the rear traction component is driven by the rear servo motor to rotate forward and reversely for feeding and unfeeding paper.

[0003] At present, the existing UV oven mainly includes a UV lamp, a frame and a conveyor belt, wherein the conveyor belt is rotatably connected to the frame, and the UV lamp is fixed on the frame and facing the conveyor belt. When in use, the cold foil is attached to the printing material after the glue is applied, and then the PET film is conveyed along the length direction of the frame by the conveyor belt. During this period, the UV lamp is turned on, and the ultraviolet rays penetrate the cold foil, triggering the photoinitiator reaction in the glue, so that it cures quickly.

[0004] In order to make the glue cure quickly, the light intensity of the UV lamp must be increased. However, in the cold stamping process of BOPP film, too high light intensity of the UV lamp will cause the film to shrink. The traditional solution is to control the temperature by reducing the light intensity and sacrificing 50% of the transmission speed of the BOPP film, which is limited in practicality. Utility Model Content

[0005] In view of this, the utility model aims to provide a UV curing device for a cold foil printing machine to achieve the purpose of improving practicality.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a UV curing device of a cold stamping printing machine, comprising a frame, a UV lamp, a conveyor belt and a conveyor roller, the conveyor roller is rotatably connected to the frame, the conveyor belt is tensioned by a plurality of the conveyor rollers, the UV lamp is arranged in the frame and directly opposite to the conveyor belt, a support frame is fixedly connected in the frame, a vertical drive motor is fixedly connected to the frame, the support frame is slidably connected to a support plate along the height direction, the UV lamp is connected to the support plate, the support plate spans the conveyor belt, an adjustment hole is opened on the support plate, an adjustment rod is connected to the power shaft of the vertical drive motor, and the adjustment rod is threadedly connected to the adjustment hole.

[0007] To implement the above technical solution, the conveyor roller rotates, and the conveyor belt rotates through the action of friction. The BOPP film on the conveyor belt is conducted from the feed port of the frame to the discharge port of the frame. During this period, the UV lamp is turned on, so that the ultraviolet rays emitted by the UV lamp fall on the conveyor belt and the BOPP film to cure the glue. The vertical drive motor is started, and the adjustment rod is rotated. Through the conduction effect of the thread, the support plate drives the UV lamp to move closer to the conveyor belt to adjust the distance between the UV lamp and the BOPP film, so that the glue has a faster curing efficiency without a high light intensity, thereby maintaining a high production efficiency while ensuring the production quality, so as to achieve the purpose of improving practicality.

[0008] As a preferred solution of the utility model, a horizontal drive motor is connected to the support plate, and the rotating shaft of the horizontal drive motor rotates and causes the UV lamp to reciprocate along the length direction of the support plate through a conduction component.

[0009] To implement the above technical solution, the horizontal drive motor is started, and the UV lamp is reciprocated along the length direction of the support plate through the conduction component to increase the illumination range of the UV lamp to adapt to BOPP films of different widths and further improve practicality.

[0010] As a preferred solution of the utility model, the conduction component includes a slide groove, a slider, and a threaded rod. The slide groove is opened on the support plate and is arranged along the length direction of the support plate. The slider is slidably connected to the slide groove and connected to the UV lamp. The threaded rod is fixed on the rotating shaft and threadedly connected to the slider. The length direction of the threaded rod is parallel to the length direction of the slide groove.

[0011] To implement the above technical solution, the horizontal drive motor is started, the rotating shaft drives the threaded rod to rotate, and the slider moves along the length direction of the slide groove through the conduction effect of the thread. The slider can move back and forth along the slide groove when the threaded rod rotates forward and reverse, and the slider moves smoothly and is not easy to cause damage to the UV lamp.

[0012] As a preferred solution of the utility model, the UV lamp is connected to the slider through a lampshade, a receiving groove is provided on the inner wall of the lampshade, a parabolic surface is provided on the inner wall of the receiving groove, the UV lamp is located at the focal position of the parabolic surface, and the opening of the lampshade faces the conveyor belt.

[0013] To implement the above technical solution, the light emitted by the UV lamp is irradiated onto the lampshade, and through the reflection effect of the parabola surface, the light can be irradiated onto the BOPP film as parallel light, so that the glue can be evenly cured, thereby improving the production quality.

[0014] As a preferred solution of the utility model, a guide groove is provided at the opening of the lampshade, a filter is slidably connected in the guide groove, and the filter is connected to the guide groove through a positioning mechanism.

[0015] To implement the above technical solution, the filter is slidably connected to the guide groove and positioned by a positioning mechanism. The light emitted by the UV lamp is filtered out by the filter to obtain light of a specific wavelength, thereby enhancing the protection of the BOPP film. At the same time, harmful wavelengths are prevented from affecting the curing stability of the glue, thereby further improving production quality and practicality.

[0016] As a preferred solution of the utility model, the positioning mechanism includes a sliding hole, a slide plate, an elastic member, and a limit plate. The sliding hole is opened on the lampshade and is connected to the guide groove. The limit plate is fixed to the end of the sliding hole and is used to support the slide plate. The slide plate is slidably connected to the sliding hole. The two ends of the elastic member are respectively connected to the slide plate and the limit plate. The slide plate is provided with a positioning inclined surface. The filter is provided with a positioning groove. The positioning inclined surface is embedded in the positioning groove.

[0017] To implement the above technical solution, the filter is slid along the length direction of the guide groove, the surface of the filter contacts the positioning inclined surface and the slide plate is completely pressed into the slide hole. As the filter continues to move, when the positioning groove corresponds to the slide plate, the positioning inclined surface is embedded in the positioning groove through the elastic force of the elastic member to realize the positioning of the filter, and the operation is simple.

[0018] As a preferred solution of the utility model, a protective cover is fixedly connected to the frame, a heat dissipation hole is opened on the protective cover, a fan is arranged in the protective cover, and the fan corresponds to the heat dissipation hole.

[0019] By implementing the above technical solution and turning on the fan, the heat in the protective cover can be quickly dissipated from the heat dissipation holes to further enhance the protection of the BOPP film. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 A schematic diagram showing the position of the support frame;

[0022] Figure 3 for Figure 2 A magnified image of point A;

[0023] Figure 4 is a schematic cross-sectional view of a lampshade;

[0024] Figure 5 A schematic diagram showing the structure of the filter;

[0025] Figure 6 It is a cross-sectional schematic diagram showing the positioning mechanism.

[0026] Figure numerals: 1. frame; 2. UV lamp; 3. conveyor belt; 4. conveyor roller; 5. support frame; 6. vertical drive motor; 7. power shaft; 8. adjustment rod; 9. support plate; 10. horizontal drive motor; 11. conduction component; 12. slide groove; 13. slider; 14. threaded rod; 15. lampshade; 16. parabola; 17. guide groove; 18. filter; 19. positioning mechanism; 20. slide hole; 21. slide plate; 22. elastic member; 23. limit plate; 24. protective cover; 25. heat dissipation hole; 26. fan; 27. positioning groove; 28. positioning inclined surface. DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0028] A UV curing device for a cold stamping press comprises a frame 1, a UV lamp 2, a conveyor belt 3 and a conveyor roller 4. The conveyor roller 4 is rotatably connected to the frame 1, and two conveyor rollers 4 are respectively located at two ends of the frame 1. The conveyor roller 4 is driven by a servo motor. The servo motor is fixed to the frame 1. The conveyor belt 3 is tensioned by the two conveyor rollers 4. When the two conveyor rollers 4 rotate in the same direction, the BOPP film on the conveyor belt 3 can be transported from the feed end of the frame 1 to the discharge end of the frame 1. The conveyor roller 4 is arranged horizontally.

[0029] The UV lamp 2 is disposed in the frame 1 and faces the conveyor belt 3 .

[0030] A vertically arranged support frame 5 is fixedly connected in the frame 1, a vertical drive motor 6 is fixedly connected to the frame 1, a support plate 9 is slidably connected to the support frame 5 along the height direction, and the support plate 9 slides along the height direction of the frame 1. The support plate 9 spans the conveyor belt 3 and is arranged horizontally, and an adjustment hole is opened at the end of the support plate 9. An adjustment rod 8 is fixedly connected to the power shaft 7 of the vertical drive motor 6, and the power shaft 7 and the adjustment rod 8 are arranged coaxially. The adjustment rod 8 is threadedly connected to the adjustment hole.

[0031] A horizontal drive motor 10 is fixedly connected to the support plate 9, and the rotating shaft of the horizontal drive motor 10 rotates and reciprocates the UV lamp 2 along the length direction of the support plate 9 through the conduction component 11. The axis of the rotating shaft is parallel to the axis of the support plate 9.

[0032] The transmission component 11 includes a slide 12, a slider 13, and a threaded rod 14. The slide 12 is provided on the support plate 9 and arranged along the length direction of the support plate 9, and the cross section of the slide 12 is square. The slider 13 is slidably connected in the slide 12. The threaded rod 14 is fixed on the rotating shaft and is threadedly connected with the slider 13, and the axis of the threaded rod 14 is coaxially arranged with the axis of the rotating shaft. The length direction of the threaded rod 14 is parallel to the length direction of the slide 12.

[0033] The vertical drive motor 6 and the horizontal drive motor 10 are both servo motors.

[0034] The UV lamp 2 is fixedly connected to the lower surface of the slider 13 through a lampshade 15. A receiving groove is provided on the inner wall of the lampshade 15. A parabola 16 is provided on the inner wall of the receiving groove. A reflective coating is fixedly connected to the inner wall of the parabola 16. The reflective coating is an aluminum coating. The UV lamp 2 is located at the focal position of the parabola 16, and the opening of the lampshade 15 faces the conveyor belt 3.

[0035] A guide groove 17 is provided at the opening of the lampshade 15, and a filter 18 is slidably connected in the guide groove 17. The filter 18 is connected in the guide groove 17 through a positioning mechanism 19. The cross section of the guide groove 17 is square.

[0036] The positioning mechanism 19 includes a sliding hole 20, a slide plate 21, an elastic member 22, and a limiting plate 23. The sliding hole 20 is provided on the lampshade 15 and communicates with the guide groove 17. The sliding hole 20 is close to the end of the guide groove 17 and has a square cross section. The limiting plate 23 is fixed to the lower end of the sliding hole 20 and is used to support the slide plate 21, and the slide plate 21 is slidably connected to the sliding hole 20. The two ends of the elastic member 22 are respectively connected to the slide plate 21 and the limiting plate 23. The slide plate 21 is provided with a positioning inclined surface 28, and the positioning inclined surface 28 is extended from the sliding hole 20 by the elastic force of the elastic member 22. A positioning groove 27 is provided on the filter 18, and the positioning inclined surface 28 is embedded in the positioning groove 27. The cross section of the positioning groove 27 is triangular. Two positioning inclined surfaces 28 are provided at the ends of the slide plate 21, and the cross section of the slide plate 21 is set to be pentagonal.

[0037] The filter 18 is slid from one end of the guide groove 17 along the length direction of the guide groove 17, the surface of the filter 18 contacts the positioning inclined surface 28 and presses the slide plate 21 completely into the slide hole 20, and as the filter 18 continues to move, when the positioning groove 27 corresponds to the slide plate 21, the positioning inclined surface 28 is embedded in the positioning groove 27 through the elastic force of the elastic member 22 to realize the positioning of the filter 18, so as to facilitate the replacement of the filter 18 and the positioning of the filter 18.

[0038] A protective cover 24 is fixedly connected to the frame 1, and the support frame 5 is located inside the protective cover 24. A heat dissipation hole 25 is opened on the protective cover 24, and a fan 26 is fixedly connected inside the protective cover 24, and the fan 26 corresponds to the heat dissipation hole 25. When the fan 26 is started, the heat in the protective cover 24 can be dissipated from the heat dissipation hole 25.

[0039] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A UV curing device for a cold stamping press, comprising a frame, a UV lamp, a conveyor belt and a conveyor roller, wherein the conveyor roller is rotatably connected to the frame, the conveyor belt is tensioned by a plurality of the conveyor rollers, and the UV lamp is arranged in the frame and directly facing the conveyor belt, wherein: A support frame is fixedly connected inside the frame, a vertical drive motor is fixedly connected to the frame, a support plate is slidably connected to the support frame along the height direction, the UV lamp is connected to the support plate, the support plate spans the conveyor belt, an adjustment hole is opened on the support plate, an adjustment rod is connected to the power shaft of the vertical drive motor, and the adjustment rod is threadedly connected to the adjustment hole.

2. The UV curing device of a cold foil printing machine according to claim 1, characterized in that: A horizontal driving motor is connected to the support plate, and the rotating shaft of the horizontal driving motor rotates and causes the UV lamp to reciprocate along the length direction of the support plate through the conduction component.

3. The UV curing device of a cold stamping machine according to claim 2, characterized in that: The conduction component includes a slide groove, a slider, and a threaded rod. The slide groove is opened on the support plate and is arranged along the length direction of the support plate. The slider is slidably connected to the slide groove and connected to the UV lamp. The threaded rod is fixed on the rotating shaft and threadedly connected to the slider. The length direction of the threaded rod is parallel to the length direction of the slide groove.

4. The UV curing device of a cold stamping machine according to claim 2 or 3, characterized in that: The UV lamp is connected to the slider via a lampshade, a receiving groove is provided on the inner wall of the lampshade, a parabolic surface is provided on the inner wall of the receiving groove, the UV lamp is located at the focal position of the parabolic surface, and the opening of the lampshade faces the conveyor belt.

5. The UV curing device of a cold foil printing machine according to claim 4, characterized in that: A guide groove is provided at the opening of the lampshade, a filter is slidably connected in the guide groove, and the filter is connected in the guide groove through a positioning mechanism.

6. The UV curing device of a cold stamping machine according to claim 5, characterized in that: The positioning mechanism includes a sliding hole, a slide plate, an elastic member, and a limit plate. The sliding hole is opened on the lampshade and is connected to the guide groove. The limit plate is fixed to the end of the sliding hole and is used to support the slide plate. The slide plate is slidably connected to the sliding hole. The two ends of the elastic member are respectively connected to the slide plate and the limit plate. The slide plate is provided with a positioning inclined surface. The filter is provided with a positioning groove. The positioning inclined surface is embedded in the positioning groove.

7. The UV curing device of a cold stamping machine according to claim 1, characterized in that: A protective cover is fixedly connected to the frame, a heat dissipation hole is opened on the protective cover, a fan is arranged inside the protective cover, and the fan corresponds to the heat dissipation hole.

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