Automatic reverse UV printing equipment and method for cigarette packaging paper

Abstract

The invention relates to the technical field of UV printing, in particular to automatic reverse UV printing equipment and method for cigarette packaging paper. The automatic reverse UV printing equipment comprises a supporting plate, a conveying belt, a cutting wheel, a printing machine box, a drying assembly, a supporting frame and a pressing wheel; according to the invention, the following problems in the reverse UV printing process of independent cigarette packaging paper in the prior art can be solved: the independent cigarette packaging paper cannot be limited during printing, so that deviation between printing ink and a pattern on the cigarette packaging paper is easily caused, and the printing precision is influenced; printing of cigarette packaging paper of different specifications cannot be adapted; the whole piece of cigarette packaging paper is cut into a plurality of long strips to be conveyed and printed, the long strips and the printing roller can move in a matched mode, it is guaranteed that patterns of the long strips are matched with printing ink, and the printing precision is guaranteed; the cutting width and the printing range of the cigarette packaging paper can be adjusted, and the device is suitable for printing of the cigarette packaging paper with different widths.

Description

Technical Field

[0001] The invention relates to the technical field of UV printing, and in particular to an automatic reverse UV printing device and method for cigarette packaging paper. Background Art

[0002] Reverse UV printing is a special printing process. Different from conventional UV printing (overall or local highlight), reverse UV applies UV varnish after printing the primer to form a local highlight area on the matte background. The contrast between matte and highlight areas enhances the design layering.

[0003] Some cigarette wrapping papers also need to use reverse UV printing to improve the appearance of cigarette boxes; cigarette wrapping papers are usually printed on the entire carrier material and then cut into multiple independent cigarette wrapping papers, but the cut-off parts of the entire carrier material will also be printed, which can easily cause waste of primer and varnish.

[0004] In the prior art, a large number of UV printing and corresponding devices are also disclosed. For a more accurate comparison, for example, a Chinese patent with publication number CN117818224A discloses a reverse UV printing device for cigarette packaging paper, including a base, a detection component and a support component. A mounting cover is installed on the load-bearing frame, and an opening is provided at the bottom of the mounting cover. A rotatably connected transmission roller is provided in the mounting cover, and white paper is rolled up on the transmission roller. A detection port is provided on the top of the mounting cover.

[0005] When the above-mentioned prior art is in use, the drive roller rotates to make the white paper contact with the cigarette wrapping paper on the conveyor belt. If the ink on the cigarette wrapping paper is not solidified, the ink will adhere to the white paper. The white paper is used to absorb the unsolidified ink, which can avoid the ink from being easily attached to other wrapping papers due to the ink on the wrapping paper not being completely solidified. Therefore, the prior art is used to print on independent cigarette wrapping paper after cutting; after the ink is sprayed onto the cigarette wrapping paper, the conveyor belt will transport the cigarette wrapping paper, and when the cigarette wrapping paper enters the workbench, the UV lamp will irradiate the cigarette wrapping paper to solidify the ink on the cigarette wrapping paper, thereby making the printing on the cigarette wrapping paper produce a frosted effect, completing the reverse UV printing work.

[0006] However, the above prior art still has the following disadvantages in the process of reverse UV printing on independent cigarette packaging paper:

[0007] 1. When printing cigarette packaging paper, it is necessary to ensure that the printed ink matches the pattern on the cigarette packaging paper. However, the above-mentioned prior art cannot limit the position of independent cigarette packaging paper when printing, which easily leads to deviation between the ink and the pattern on the cigarette packaging paper, thereby affecting the printing accuracy.

[0008] 2. Since the patterns on cigarette packaging papers of different specifications are different, the printing range of the ink needs to be adjusted according to the size of the pattern, but the above-mentioned prior art does not involve the printing technology for cigarette packaging papers of different specifications, and thus cannot adapt to the printing of cigarette packaging papers of different specifications.

[0009] Therefore, under the above-stated viewpoint, the prior art UV printing method still has room for improvement. Summary of the invention

[0010] In order to solve the above problems, the present invention provides an automatic reverse UV printing device for cigarette packaging paper, comprising two support plates parallel to each other, the opposite sides of the two support plates are rotatably connected with a conveyor belt, the opposite sides of the two support plates are sequentially installed with a cutting wheel located at the upper end of the conveyor belt, a printing machine box and a drying component, the upper end of the support plate is connected with a support frame, a pressing wheel is rotatably installed between the two support frames, and the pressing wheel is located on the side of the cutting wheel away from the printing machine box, and the continuous cutting, printing and drying of the cigarette packaging paper can be achieved through the cooperation between the cutting wheel, the printing machine box, the drying component and the pressing wheel;

[0011] The printing machine box has two, and the two side walls in the width direction of the two printing machine boxes are rotatably connected with a transmission shaft and a linkage shaft. The outer walls of the transmission shaft and the linkage shaft are sleeved with multiple printing rollers equidistantly distributed along their axial directions through sleeves, which are used for printing cigarette packaging paper.

[0012] As a preferred technical solution of the present invention, primer glue and varnish are respectively stored inside the two printing boxes, and primer glue is stored in the printing box close to the cutting wheel. Both sides of the bottom length direction of the two printing boxes are provided with multiple discharge ports for overflowing the primer glue or varnish downward, and the multiple discharge ports correspond to the positions of the printing rollers, and the printing rollers are abutted against the discharge ports for being stained with primer glue or varnish and then printed on cigarette packaging paper.

[0013] As a preferred technical solution of the present invention, a connecting shaft is rotatably connected between the two support frames, and the outer wall of the connecting shaft is sleeved with a plurality of cutting groups staggered with the printing rollers, and each cutting group includes two cutting wheels;

[0014] A driving motor connected to the linkage shaft is installed on any one of the support frames through a motor seat, and the transmission shaft, the linkage shaft and the connecting shaft are connected through belt transmission.

[0015] As a preferred technical solution of the present invention, a support is rotatably installed on the opposite sides of two adjacent printing rollers, and a connecting rod is installed between the two support corresponding to the positions on the transmission shaft and the linkage shaft;

[0016] Auxiliary rings are rotatably mounted on opposite sides of the two cutting wheels of the same cutting group, and two telescopic rods are staggered and hinged between the two auxiliary rings in the same cutting group and the two supporting members corresponding to their positions, so that the two telescopic rods form an X shape.

[0017] As a preferred technical solution of the present invention, the two telescopic rods in the same cutting group are hinged to each other in the middle and rotatably penetrated by a latch shaft, and a cross bar located above the telescopic rod is installed on the opposite sides of the two support frames, and multiple latch shafts are rotatably installed at the bottom of the cross bar.

[0018] As a preferred technical solution of the present invention, a fixing rod is further provided on the opposite sides of the two support frames, a guide groove is provided on the side of the fixing rod close to the cutting wheel, an adjusting rod slidably inserted in the guide groove is provided on the side of the auxiliary ring close to the fixing rod, and a damping pad is provided between the adjusting rod and the guide groove.

[0019] As a preferred technical solution of the present invention, a linkage ring is rotatably installed on the opposite sides of two adjacent printing rollers, a plurality of ring-distributed connecting rods are arranged between the linkage ring and the sleeve, two pillars slidably docked inside the discharge port are installed on the upper end of the linkage ring, and a sealing patch slidably abutted against the bottom wall of the printing machine case is arranged at one end of the pillar away from the linkage ring, and the sealing patch is used to close the discharge port.

[0020] As a preferred technical solution of the present invention, the drying component includes a heat dissipation cover installed on the upper end of the support frame, a UV curing lamp group is installed in the heat dissipation cover, a heat dissipation hole is opened on the upper end of the heat dissipation cover, and heat dissipation fins are installed in the heat dissipation hole.

[0021] As a preferred technical solution of the present invention, the opposite sides of the two support frames are rotatably connected with a rotating shaft located inside the heat dissipation cover, the rotating shaft is located on the side of the UV curing lamp group away from the printing machine chassis, and the rotating shaft is rotatably abutted against the upper end of the conveyor belt.

[0022] In addition, the present invention also provides an automated reverse UV printing method for cigarette packaging paper, comprising the following steps:

[0023] S1: Cigarette wrapping paper delivery: First, the starting section of the cigarette wrapping paper roll to be printed is pulled to the upper end of the conveyor belt, and then the conveyor belt is started. The conveyor belt rotates and conveys the cigarette wrapping paper to the side close to the printing machine box by electrostatic adsorption;

[0024] S2: Cigarette wrapping paper cutting: cutting the whole cigarette wrapping paper into multiple pieces by a cutting wheel;

[0025] S3: Cigarette packaging paper printing: The conveyor belt conveys the cigarette packaging paper to the bottom of the printing machine box, and the base glue and varnish are printed on the upper end of the cigarette packaging paper through the printing roller;

[0026] S4: Drying and curing: The printed cigarette packaging paper is dried and cured by a drying component, and then the cigarette packaging paper is sent out by a conveyor belt.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] 1. The present invention can cut a whole sheet of cigarette packaging paper into multiple pieces and cut off the intervals between the multiple cigarette packaging papers, thereby avoiding the waste of ink caused by printing the intervals between the cigarette packaging papers, and by cutting the whole sheet of cigarette packaging paper into multiple long strips for conveying and printing, it can make it move in coordination with the printing roller, ensuring that its pattern and printing ink are consistent, and ensuring printing accuracy; in addition, the present invention can dry and solidify the printed cigarette packaging paper to avoid the coating on the cigarette packaging paper from being damaged, thereby realizing automatic reverse UV printing of cigarette packaging paper, and integrating cutting, printing and drying and solidification into one can effectively improve work efficiency.

[0029] 2. The present invention can control the synchronous rotation of the printing roller and the cutting wheel, so as to print the base glue and varnish in sequence on the upper end of the cigarette packaging paper while cutting the cigarette packaging paper. Thus, by cutting the cigarette packaging paper at intervals in advance, the waste of base glue and varnish caused by printing at intervals of the cigarette packaging paper can be avoided, and the cigarette packaging paper can be transported during the cutting process without tilting and deviation, thereby ensuring the cutting and printing accuracy of the cigarette packaging paper.

[0030] 3. The present invention can adjust the distance between two adjacent cutting wheels by toggling the adjusting rod to drive the auxiliary ring and the cutting wheel to move, so that the cigarette packaging paper can be cut into different widths to adapt to cigarette packaging papers of different specifications. At the same time, the distance between the printing rollers can be adjusted synchronously, so that the printing range of the printing roller on the cigarette packaging paper can be adjusted according to the cutting width of the cigarette packaging paper by the cutting wheel, which can adapt to the printing of cigarette packaging papers of different widths, greatly improving the scope of application of the present invention.

[0031] Fourth, the present invention uses UV curing lamp group to emit ultraviolet rays to irradiate and cure cigarette packaging paper, so that the primer and varnish on the upper end of the cigarette packaging paper are quickly cured, and at the same time, the heat dissipation holes and heat dissipation fins can quickly dissipate heat when the UV curing lamp group.

[0032] 5. The present invention can continuously press and limit the cigarette packaging paper through the rotating shaft and the pressing wheel in conjunction with the conveyor belt, so that the cigarette packaging paper is always attached to the upper end of the conveyor belt during transportation, preventing the cigarette packaging paper from shifting and the formation of gaps between the cigarette packaging paper and the conveyor belt, which affects the cutting accuracy and printing quality. The cigarette packaging paper that has been cut and printed moves with the conveyor belt to the side away from the cutting wheel and is sent out. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Figure 1 It is a first structural schematic diagram of the present invention.

[0035] Figure 2 It is a second structural schematic diagram of the present invention.

[0036] Figure 3 It is a schematic diagram of the structure among the transmission shaft, linkage shaft, sleeve and printing roller of the present invention.

[0037] Figure 4 The present invention Figure 3 A partial enlarged view of point A.

[0038] Figure 5 It is a schematic diagram of the internal structure of the printing machine box of the present invention.

[0039] Figure 6 The present invention Figure 5 A partial enlarged view of point B.

[0040] Figure 7 It is a schematic diagram of the structure among the printing machine box, the transmission shaft, the linkage shaft and the printing roller of the present invention.

[0041] Figure 8 It is a schematic diagram of the structure among the conveyor belt, printing machine box and drying components of the present invention.

[0042] In the figure, 1. support plate; 2. conveyor belt; 3. printing machine case; 31. transmission shaft; 32. linkage shaft; 33. sleeve; 34. printing roller; 340. linkage ring; 341. support member; 342. connecting rod; 343. auxiliary ring; 344. telescopic rod; 345. latch shaft; 346. cross bar; 347. fixing rod; 348. guide groove; 349. adjusting rod; 350. connecting rod; 351. pillar; 352. sealing patch; 36. discharge port; 37. connecting shaft; 38. driving motor; 4. cutting wheel; 5. drying assembly; 51. heat dissipation cover; 52. UV curing lamp group; 53. heat dissipation hole; 54. heat dissipation fin; 55. rotating shaft; 6. support frame; 7. pressing wheel. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-8 Embodiments of the present invention are described in detail.

[0044] The embodiment of the present application discloses an automatic reverse UV printing device for cigarette packaging paper. It should be noted that the automatic reverse UV printing device for cigarette packaging paper of the present application is mainly used in the process of reverse UV printing on cigarette packaging paper. In terms of technical effect, the whole cigarette packaging paper can be cut into multiple pieces, and then the cut cigarette packaging paper is printed with primer and varnish, and then the printed cigarette packaging paper is dried and cured to avoid the coating on the cigarette packaging paper from being damaged. The integration of cutting, printing and drying and curing into one can effectively improve the work efficiency, especially in the process of cutting. During the cutting and printing process, the spacing between two adjacent cutting wheels 4 and the spacing between two adjacent printing rollers 34 can be adjusted, so that the cigarette packaging paper can be cut into different widths and printed on cigarette packaging papers of different widths, which is suitable for cigarette packaging papers of different specifications. Furthermore, the cigarette packaging paper automated reverse UV printing equipment of the present application can also continuously press and limit the cigarette packaging paper when conveying it, so that the cigarette packaging paper is always attached to the upper end of the conveyor belt 2, preventing the cigarette packaging paper from being offset and the formation of gaps between the cigarette packaging paper and the conveyor belt 2, thereby affecting the cutting accuracy and printing quality.

[0045] Reference Figure 1 and Figure 2 As shown, an automated reverse UV printing device for cigarette packaging paper comprises two parallel support plates 1, opposite sides of the two support plates 1 are rotatably connected with a conveyor belt 2, opposite sides of the two support plates 1 are sequentially installed with a cutting wheel 4, a printing case 3 and a drying component 5 located at the upper end of the conveyor belt 2, the upper end of the support plate 1 is connected with a support frame 6, the printing case 3 is located on opposite sides of the two support frames 6, a pressing wheel 7 is rotatably installed between the two support frames 6, the pressing wheel 7 is located on the side of the cutting wheel 4 away from the printing case 3, the pressing wheel 7 can rotate freely, and the pressing wheel 7 is in rolling contact with the conveyor belt 2, so that when the conveyor belt 2 is running, the friction force can drive the pressing wheel 7 to rotate synchronously in the opposite direction, and the cutting wheel 4, the printing case 3, the drying component 5 and the pressing wheel 7 are coordinated to realize continuous cutting, printing and drying of the cigarette packaging paper.

[0046] Furthermore, in this embodiment, there are two printing machine boxes 3, and a transmission shaft 31 and a linkage shaft 32 are rotatably connected between the two side walls in the width direction of the two printing machine boxes 3. The outer walls of the transmission shaft 31 and the linkage shaft 32 are sleeved with multiple printing rollers 34 equidistantly distributed along their axial directions through sleeves 33, which are used to print cigarette packaging paper.

[0047] It should be noted that the conveyor belt 2 used in this embodiment is a prior art, which has its own drive and controller, and can automatically control the start and shut down status. The surface of the conveyor belt 2 can produce electrostatic adsorption on the cigarette packaging paper to ensure that the cigarette packaging paper can be placed on the upper end of the conveyor belt 2. The corresponding limit will not occur, thereby improving the subsequent cutting accuracy of the cigarette packaging paper.

[0048] In the specific implementation process, the starting section of the cigarette packaging paper roll to be printed is first pulled to the upper end of the conveyor belt 2, and then the conveyor belt 2 is started. The conveyor belt 2 rotates and conveys the cigarette packaging paper to the side close to the printing machine box 3 by electrostatic adsorption. During this period, the pressing wheel 7 can press the cigarette packaging paper downward so that the cigarette packaging paper is always attached to the conveyor belt 2, thereby ensuring the conveying efficiency of the conveyor belt 2 for the cigarette packaging paper and preventing the cigarette packaging paper and the conveyor belt 2 from sliding against each other and causing cutting deviations; then the conveyor belt 2 conveys the cigarette packaging paper to the bottom of the cutting wheel 4, and the cutting wheel 4 presses the cigarette packaging paper to the bottom of the cutting wheel 4. The cigarette wrapping paper is cut so that the whole cigarette wrapping paper is divided into multiple pieces, and the intervals between the multiple cigarette wrapping papers are cut off, so as to avoid the waste of ink caused by printing the intervals between the multiple cigarette wrapping papers during the printing process; then the conveyor belt 2 conveys the cut cigarette wrapping paper to the bottom of the printing machine box 3, and the printing machine box 3 prints the cigarette wrapping paper through the printing roller 34. When the printed cigarette wrapping paper is conveyed to the drying component 5, the drying component 5 dries and solidifies the cigarette wrapping paper to avoid the coating on the cigarette wrapping paper being damaged; in this way, the automatic reverse UV printing of the cigarette wrapping paper can be realized, and the work efficiency can be improved.

[0049] Reference Figure 2 and Figure 3 As shown, in order to facilitate the rapid printing of primer and varnish on cigarette packaging paper, in this embodiment, primer and varnish are respectively stored inside the two printing boxes 3. The printing box 3 near the cutting wheel 4 contains primer, and both sides of the bottom length direction of the two printing boxes 3 are provided with multiple discharge ports 36 for overflowing the primer or varnish downward. The multiple discharge ports 36 correspond to the positions of the printing rollers 34, and the printing rollers 34 are abutted against the discharge ports 36 for printing on the cigarette packaging paper after being stained with primer or varnish.

[0050] Furthermore, in order to improve the printing accuracy of cigarette packaging paper and prevent the loss of base glue and varnish, in this embodiment, a connecting shaft 37 is rotatably connected between the two support frames 6, and the outer wall of the connecting shaft 37 is provided with a plurality of cutting groups staggered with the printing roller 34, and each cutting group includes two cutting wheels 4; a driving motor 38 connected to the linkage shaft 32 is installed on any one of the support frames 6 through a motor seat, and the transmission shaft 31, the linkage shaft 32 and the connecting shaft 37 are connected by belt transmission.

[0051] In the specific implementation process, the drive motor 38 is started, and the output shaft of the drive motor 38 drives the linkage shaft 32 and the transmission shaft 31 to rotate synchronously, and the linkage shaft 32 and the transmission shaft 31 drive the printing roller 34 to rotate synchronously, and the transmission shaft 31 drives the connecting shaft 37 and the multiple groups of cutting wheels 4 on its outer wall to rotate. During the rotation of the printing roller 34, the printing roller 34 rolls and picks up the base glue and varnish in the printing machine box 3; when the conveyor belt 2 conveys the cigarette packaging paper to the bottom of the cutting wheel 4, the cutting wheel 4 cuts the cigarette packaging paper. During this period, the two cutting wheels in each cutting group The printed part of the cigarette wrapping paper is cut between the cutting wheels 4, and the excess part of the cigarette wrapping paper is cut between the two cutting wheels 4 of two adjacent cutting groups. Then the printing roller 34 on the outer wall of the transmission shaft 31 prints base glue on the cut cigarette wrapping paper. When the cigarette wrapping paper moves to the bottom of the printing roller 34 on the outer wall of the linkage shaft 32, the printing roller 34 prints varnish on the cigarette wrapping paper, thereby completing the printing of the cigarette wrapping paper. By cutting the cigarette wrapping paper at intervals in advance, the waste of base glue and varnish caused by printing at intervals of the cigarette wrapping paper is avoided.

[0052] Reference Figure 3 and Figure 4 As shown, since cigarette packaging papers of different specifications need to be cut to different widths, in this embodiment, the spacing of the cutting wheels 4 and the spacing of the printing rollers 34 can be adjusted accordingly to adapt to the cutting and printing of different cigarette packaging papers. Specifically, support members 341 are rotatably installed on opposite sides of two adjacent printing rollers 34, and a connecting rod 342 is installed between two support members 341 at corresponding positions on the transmission shaft 31 and the linkage shaft 32; auxiliary rings 343 are rotatably installed on opposite sides of the two cutting wheels 4 of the same cutting group, and two telescopic rods 344 are staggered and hinged between the two auxiliary rings 343 in the same cutting group and the two support members 341 corresponding to their positions, so that the two telescopic rods 344 form an X shape, and the telescopic rods 344 can adaptively extend and retract under the action of external force.

[0053] Furthermore, in this embodiment, the two telescopic rods 344 in the same cutting group are hinged to each other in the middle and rotatably penetrated by a latch shaft 345, and a cross bar 346 located above the telescopic rod 344 is installed on the opposite sides of the two support frames 6, and multiple latch shafts 345 are rotatably installed at the bottom of the cross bar 346.

[0054] Furthermore, in this embodiment, a fixing rod 347 is further provided on the opposite sides of the two support frames 6, a guide groove 348 is provided on the side of the fixing rod 347 close to the cutting wheel 4, an adjusting rod 349 slidably inserted in the guide groove 348 is provided on the side of the auxiliary ring 343 close to the fixing rod 347, a damping pad (not shown in the figure) is provided between the adjusting rod 349 and the guide groove 348, and the damping pad can increase the friction between the adjusting rod 349 and the guide groove 348. When the adjusting rod 349 is pushed to the specified position, it will not move at will, thereby limiting the position of the cutting wheel 4 and the printing roller 34 after adjustment.

[0055] It should be noted that the printing roller 34 is connected to the transmission shaft 31 and the linkage shaft 32 by key teeth (not shown in the figure), so that the printing roller 34 can slide on the outer walls of the transmission shaft 31 and the linkage shaft 32, and the transmission shaft 31 and the linkage shaft 32 can drive the printing roller 34 to rotate; at the same time, the cutting wheel 4 is also connected to the connecting shaft 37 by key teeth, so that the cutting wheel 4 slides on the outer wall of the connecting shaft 37 without affecting the operation of the cutting wheel 4 driven by the connecting shaft 37.

[0056] In the specific implementation process, before cutting and printing the cigarette packaging paper, the adjusting rod 349 is toggled, and the adjusting rod 349 drives the cutting wheel 4 to move along the axial direction of the connecting shaft 37 through the auxiliary ring 343, so as to adjust the distance between the two cutting wheels 4 in the same cutting group, thereby cutting the cigarette packaging paper into different widths to adapt to cigarette packaging papers of different specifications; at the same time, the adjusting rod 349 drives the telescopic rod 344 to move synchronously at one end close to the cutting wheel 4, and the telescopic rod 344 drives the support member 341 and the printing roller 34 to move in the opposite direction under the action of the latch shaft 345, thereby forming a fulcrum between the cutting wheel 4 and the printing roller 34 through the telescopic rod 344 and the latch shaft 345, so that the distance between the printing rollers 34 is adjusted synchronously when the cutting wheel 4 is adjusted, so that the printing range of the printing roller 34 on the cigarette packaging paper can be adjusted according to the cutting width of the cutting wheel 4 on the cigarette packaging paper, so as to adapt to the printing of cigarette packaging papers of different widths, thereby greatly improving the scope of application of the present invention.

[0057] Reference Figure 5 , Figure 6 and Figure 7As shown, in order to facilitate the printing roller 34 to pick up the primer and varnish in the printing case 3 and prevent the primer and varnish from flowing out of the discharge port 36 and causing waste, in the present embodiment, a linkage ring 340 is rotatably installed on the opposite sides of two adjacent printing rollers 34, and a plurality of annularly distributed connecting rods 350 are arranged between the linkage ring 340 and the sleeve 33. Two pillars 351 slidably docked inside the discharge port 36 are installed on the upper end of the linkage ring 340, and a sealing patch 352 slidably abutting against the inner bottom wall of the printing case 3 is arranged at one end of the pillar 351 away from the linkage ring 340, and the sealing patch 352 is used to close the discharge port 36.

[0058] It should be supplemented that the connecting rod 350 and the linkage ring 340 are rotatably connected, so that the sleeve 33 can drive the linkage ring 340 to move along the axial direction of the printing roller 34 through the connecting rod 342, but the linkage ring 340 will not rotate with the sleeve 33; in addition, the length of the discharge port 36 is greater than the length of the printing roller 34, so the printing roller 34 cannot completely close the discharge port 36, resulting in a gap in the discharge port 36, causing the base glue and varnish to flow out. At this time, the gap between the printing roller 34 and the discharge port 36 can be sealed by the patch to ensure that the printing roller 34 quantitatively picks up the base glue and varnish to prevent the base glue and varnish from flowing out and causing waste; in addition, the pillar 351 can slide adaptively in the discharge port 36, so that when adjusting the spacing of the printing rollers 34, the printing roller 34 can drive the pillar 351 and the sealing patch 352 to move adaptively through the sleeve 33, the connecting rod 350 and the linkage ring 340.

[0059] Reference Figure 8 As shown, since the base glue and varnish cannot be dried quickly after printing, the base glue and varnish printed on the upper end of the cigarette packaging paper are easily exposed to the outside and damaged. Based on this, a corresponding drying component 5 is provided in this embodiment. Specifically, the drying component 5 includes a heat dissipation cover 51 installed on the upper end of the support frame 6, and a UV curing lamp group 52 is installed in the heat dissipation cover 51. A heat dissipation hole 53 is opened on the upper end of the heat dissipation cover 51, and a heat dissipation fin 54 is installed in the heat dissipation hole 53.

[0060] Furthermore, in this embodiment, the opposite sides of the two support frames 6 are rotatably connected with a rotating shaft 55 located inside the heat dissipation cover 51 , the rotating shaft 55 is located on the side of the UV curing lamp group 52 away from the printing machine chassis 3 , and the rotating shaft 55 is rotatably abutted against the upper end of the conveyor belt 2 .

[0061] In the specific implementation process, when the cigarette wrapping paper is printed and moves to the bottom of the UV curing lamp group 52 under the transmission of the conveyor belt, the UV curing lamp group 52 emits ultraviolet rays to cure the cigarette wrapping paper, so that the primer and varnish on the upper end of the cigarette wrapping paper are quickly cured. At the same time, the heat dissipation holes 53 and the heat dissipation fins 54 can quickly dissipate heat from the UV curing lamp group 52 to prevent the UV curing lamp group 52 from malfunctioning due to excessive temperature.

[0062] When the conveyor belt 2 conveys the cigarette wrapping paper to the bottom of the rotating shaft 55, the rotating shaft 55 cooperates with the conveyor belt 2 to squeeze and limit the cigarette wrapping paper, so that the cigarette wrapping paper is always attached to the upper end of the conveyor belt 2, and the rotating shaft 55 cooperates with the pressing wheel 7 to continuously press and limit the two ends of the cigarette wrapping paper to prevent the cigarette wrapping paper from shifting and the formation of a gap between the conveyor belt 2 and the conveyor belt 2 to affect the cutting accuracy and printing quality, and the cigarette wrapping paper that has been cut and printed moves with the conveyor belt 2 to the side away from the cutting wheel 4 and is sent out.

[0063] In addition, the present invention also provides an automated reverse UV printing method for cigarette packaging paper, comprising the following steps:

[0064] S1: Cigarette wrapping paper delivery: first, the starting section of the cigarette wrapping paper roll to be printed is pulled to the upper end of the conveyor belt 2, and then the conveyor belt 2 is started. The conveyor belt 2 rotates and conveys the cigarette wrapping paper to the side close to the printing machine box 3 by electrostatic adsorption. During this period, the pressing wheel 7 can press the cigarette wrapping paper downward so that the cigarette wrapping paper is always attached to the conveyor belt 2, thereby ensuring the conveying efficiency of the conveyor belt 2 for the cigarette wrapping paper.

[0065] Before cutting and printing the cigarette packaging paper, the adjusting rod 349 is toggled. The adjusting rod 349 drives the cutting wheel 4 to move through the auxiliary ring 343, so as to adjust the distance between the two cutting wheels 4 in the same cutting group, thereby facilitating the cutting wheel 4 to cut the cigarette packaging paper into different widths to adapt to cigarette packaging papers of different specifications; at the same time, the adjusting rod 349 drives the support member 341 and the printing roller 34 to move in the opposite direction through the telescopic rod 344, thereby forming a fulcrum between the cutting wheel 4 and the printing roller 34 through the telescopic rod 344 and the latch shaft 345, so that the distance between the printing rollers 34 can be adjusted synchronously while the cutting wheel 4 is adjusted, so that the printing range of the printing roller 34 on the cigarette packaging paper can be adjusted according to the cutting width of the cigarette packaging paper by the cutting wheel 4, so as to adapt to the printing of cigarette packaging papers of different widths.

[0066] S2: Cutting of cigarette wrapping paper: start the driving motor 38, the output shaft of the driving motor 38 drives the linkage shaft 32 and the transmission shaft 31 to rotate synchronously, the linkage shaft 32 and the transmission shaft 31 drive the printing roller 34 to rotate synchronously, the transmission shaft 31 drives the connecting shaft 37 and multiple groups of cutting wheels 4 on its outer wall to rotate, the cigarette wrapping paper is conveyed to the bottom of the cutting wheel 4 through the conveyor belt 2, the cutting wheel 4 cuts the cigarette wrapping paper, so that the whole cigarette wrapping paper is divided into multiple pieces, the printed part of the cigarette wrapping paper is cut between the two cutting wheels 4 in each cutting group, and the excess part of the cigarette wrapping paper is cut between the two cutting wheels 4 of the two adjacent cutting groups, so as to avoid the waste of ink caused by printing at the intervals of multiple cigarette wrapping papers during the printing process.

[0067] S3: Printing of cigarette wrapping paper: The printing roller 34 rolls and picks up the base glue and varnish in the printing machine box 3 during its rotation. When the conveyor belt 2 conveys the cigarette wrapping paper to the bottom of the printing roller 34, the printing roller 34 on the outer wall of the transmission shaft 31 prints the base glue on the cut cigarette wrapping paper, and then the printing roller 34 on the outer wall of the linkage shaft 32 prints the varnish on the cigarette wrapping paper, thereby completing the printing of the cigarette wrapping paper. By cutting the cigarette wrapping paper at intervals in advance, the waste of base glue and varnish caused by printing at intervals of the cigarette wrapping paper is avoided.

[0068] S4: Drying and curing: When the cigarette wrapping paper is printed and moves to the bottom of the UV curing lamp group 52 under the transmission of the transmission belt, the UV curing lamp group 52 emits ultraviolet rays to irradiate and cure the cigarette wrapping paper, so that the primer and varnish on the upper end of the cigarette wrapping paper are quickly cured; when the conveyor belt 2 conveys the cigarette wrapping paper to the bottom of the rotating shaft 55, the rotating shaft 55 cooperates with the conveyor belt 2 to squeeze and limit the cigarette wrapping paper, so that the cigarette wrapping paper is always attached to the upper end of the conveyor belt 2, and the rotating shaft 55 cooperates with the pressing wheel 7 to continuously press and limit the two ends of the cigarette wrapping paper to prevent the cigarette wrapping paper from deviating and generating a gap between the conveyor belt 2 and the conveyor belt 2 to affect the cutting accuracy and printing quality, and the cut and printed cigarette wrapping paper moves with the conveyor belt 2 to the side away from the cutting wheel 4 and is sent out, and then the printed long strips of cigarette wrapping paper are cut again into multiple independent cigarette wrapping papers.

[0069] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic reverse UV printing device for cigarette packaging paper, comprising two mutually parallel support plates (1), the opposite sides of the two support plates (1) being rotatably connected with a conveyor belt (2), characterized in that: A cutting wheel (4) located at the upper end of the conveyor belt (2), a printing machine box (3) and a drying component (5) are sequentially installed on opposite sides of the two support plates (1); a support frame (6) is connected to the upper end of the support plate (1); a pressing wheel (7) is rotatably installed between the two support frames (6); the pressing wheel (7) is located on the side of the cutting wheel (4) away from the printing machine box (3); and the continuous cutting, printing and drying of cigarette packaging paper can be achieved through the cooperation between the cutting wheel (4), the printing machine box (3), the drying component (5) and the pressing wheel (7); The printing machine boxes (3) have two, and a transmission shaft (31) and a linkage shaft (32) are rotatably connected between the two side walls in the width direction of the two printing machine boxes (3). The outer walls of the transmission shaft (31) and the linkage shaft (32) are sleeved with a plurality of printing rollers (34) equidistantly distributed along the axis direction thereof through sleeves (33), and are used for printing cigarette packaging paper.

2. The automatic reverse UV printing device for cigarette packaging paper according to claim 1, characterized in that: The two printing boxes (3) store primer and varnish respectively. The printing box (3) near the cutting wheel (4) stores primer. Both sides of the bottom of the two printing boxes (3) in the length direction are provided with a plurality of discharge ports (36) for overflowing the primer or varnish downwards. The plurality of discharge ports (36) correspond to the positions of the printing roller (34), and the printing roller (34) abuts against the discharge port (36) for being stained with primer or varnish and then printed on cigarette packaging paper.

3. The automatic reverse UV printing device for cigarette packaging paper according to claim 1, characterized in that: A connecting shaft (37) is rotatably connected between the two support frames (6), and the outer wall of the connecting shaft (37) is sleeved with a plurality of cutting groups staggered with the printing rollers (34), and each cutting group includes two cutting wheels (4); A driving motor (38) connected to the linkage shaft (32) is installed on any one of the support frames (6) via a motor seat, and the transmission shaft (31), the linkage shaft (32) and the connecting shaft (37) are connected via a belt transmission.

4. The automatic reverse UV printing device for cigarette packaging paper according to claim 1, characterized in that: A support member (341) is rotatably mounted on opposite sides of two adjacent printing rollers (34), and a connecting rod (342) is mounted between two support members (341) at corresponding positions on the transmission shaft (31) and the linkage shaft (32); Auxiliary rings (343) are rotatably mounted on opposite sides of two cutting wheels (4) of the same cutting group, and two telescopic rods (344) are staggered and hinged between the two auxiliary rings (343) in the same cutting group and two supporting members (341) corresponding to their positions, so that the two telescopic rods (344) form an X shape.

5. The automatic reverse UV printing device for cigarette packaging paper according to claim 4, characterized in that: The middle parts of the two telescopic rods (344) in the same cutting group are hinged to each other and rotatably penetrated with a latch shaft (345); the opposite sides of the two support frames (6) are equipped with a cross bar (346) located above the telescopic rod (344); and a plurality of latch shafts (345) are rotatably installed at the bottom of the cross bar (346).

6. The automatic reverse UV printing device for cigarette packaging paper according to claim 4, characterized in that: A fixing rod (347) is further provided on the opposite sides of the two support frames (6); a guide groove (348) is provided on the side of the fixing rod (347) close to the cutting wheel (4); an adjusting rod (349) slidably inserted in the guide groove (348) is provided on the side of the auxiliary ring (343) close to the fixing rod (347); a damping pad is provided between the adjusting rod (349) and the guide groove (348).

7. The automatic reverse UV printing device for cigarette packaging paper according to claim 4, characterized in that: A linkage ring (340) is rotatably mounted on opposite sides of two adjacent printing rollers (34); a plurality of annularly distributed connecting rods (350) are arranged between the linkage ring (340) and the sleeve (33); two pillars (351) slidably docked inside the discharge port (36) are arranged on the upper end of the linkage ring (340); a sealing patch (352) slidably docked on the inner bottom wall of the printing machine box (3) is arranged at one end of the pillar (351) away from the linkage ring (340); the sealing patch (352) is used to close the discharge port (36).

8. The automatic reverse UV printing device for cigarette packaging paper according to claim 1, characterized in that: The drying assembly (5) comprises a heat dissipation cover (51) mounted on the upper end of the support frame (6), a UV curing lamp group (52) is mounted in the heat dissipation cover (51), a heat dissipation hole (53) is opened at the upper end of the heat dissipation cover (51), and a heat dissipation fin (54) is mounted in the heat dissipation hole (53).

9. The automatic reverse UV printing device for cigarette packaging paper according to claim 8, characterized in that: The opposite sides of the two support frames (6) are rotatably connected to a rotating shaft (55) located inside the heat dissipation cover (51); the rotating shaft (55) is located on a side of the UV curing lamp group (52) away from the printing machine box (3), and the rotating shaft (55) is rotatably abutted against the upper end of the conveyor belt (2).

10. An automated reverse UV printing method for cigarette packaging paper, using an automated reverse UV printing device for cigarette packaging paper as claimed in any one of claims 1 to 9, characterized in that: The printing method comprises the following steps: S1: Cigarette wrapping paper delivery: firstly, the starting section of the cigarette wrapping paper roll to be printed is pulled to the upper end of the conveyor belt (2), then the conveyor belt (2) is started, and the conveyor belt (2) rotates and conveys the cigarette wrapping paper to the side close to the printing machine box (3) by means of electrostatic adsorption; S2: Cutting of cigarette wrapping paper: Cutting the entire cigarette wrapping paper into multiple pieces by means of a cutting wheel (4); S3: Cigarette packaging paper printing: The conveyor belt (2) conveys the cigarette packaging paper to the bottom of the printing machine box (3), and the base glue and varnish are printed on the upper end of the cigarette packaging paper through the printing roller (34); S4: Drying and curing: The printed cigarette packaging paper is dried and cured by the drying component (5), and then the cigarette packaging paper is sent out by the conveyor belt (2).

Images