Automatic packaging box production line

Abstract

The application discloses a kind of packaging box automation production line, and the cooperation of eccentric wheel and support seat is realized to the pattern printing of printing roller periphery falls after completion and does not release with paper tape, then through first connecting shaft structure makes that compression roller and printing roller linkage rotation release, and through driving rotation mechanism realizes that printing roller rotates to next printing starting point, again through first connecting shaft structure realizes that compression roller and printing roller linkage, only need to set a group of patterns on the periphery of printing roller, it can be adapted to the printing of any size pattern.

Description

Technical Field

[0001] This invention belongs to the field of packaging box production, and specifically relates to an automated production line for packaging boxes. Background Technology

[0002] Packaging boxes, as the name suggests, are boxes used to package products. They are used to ensure the safety of products during transportation and to enhance the product's perceived quality.

[0003] The production of existing packaging boxes can refer to a new printing production line disclosed in Chinese patent application number CN201520538144.2. It requires the supply of paper tape through an unwinding mechanism, and the formation of patterns on the surface of the paper tape through multiple printing processes. Then, the packaging box cardboard is cut from the paper tape by die-cutting. In addition, in order to improve the quality of the packaging box, processes such as creasing and hot stamping are also performed. These processes belong to different product quality requirements and are not necessary.

[0004] Existing printing methods all use a rolling printing press, in which ink from the printing roller is printed onto the surface of the paper tape through the cooperation of a pressure roller and a printing roller.

[0005] The problems with the above printing process are as follows: In order to ensure the effective cooperation between the printing roller and the pressure roller, the size of the printing roller is usually constant, and the outer circumference of the printing roller is larger than the printed pattern. This means that multiple sets of the same pattern need to be set along the circumference of the outer surface of the printing roller, which makes the pattern engraving on the surface of the printing roller complicated and increases costs. This is especially true for packaging boxes that are not mass-produced, which greatly increases production costs. In addition, in order to ensure that the circumferential patterns can be printed repeatedly, it is usually necessary to calculate the spacing between adjacent patterns in the circumferential direction. This not only makes the pattern layout design of the printing roller complicated, but also makes the spacing between adjacent patterns constant and cannot be adjusted during printing. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide an automated packaging box production line. This line utilizes an eccentric wheel and a support base to ensure that after the pattern on the outer circumference of the printing roller is printed, it falls without disengaging from the paper tape. Then, a first coupling structure causes the pressure roller and printing roller to rotate in tandem, disengaging the roller. An active rotation mechanism then rotates the printing roller to the next printing starting point. The first coupling structure then re-establishes the linkage between the pressure roller and printing roller. Only one pattern needs to be set on the outer circumference of the printing roller, making it suitable for printing patterns of any size.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An automated packaging box production line, characterized in that it comprises: an unwinding mechanism, a multi-piece printing device, a multi-piece drying device, a laminating device, a creasing device, a die-cutting device, and a conveying device; the unwinding mechanism holds a roll of paper, and under the drive of the conveying device, the roll of paper is output as a continuous paper strip by rotation; the paper strip passes through each printing device to form a pattern layer; the paper strip passes through the drying device to dry the ink printed on the paper strip; the paper strip passes through the laminating device to coat the surface of the pattern layer with a protective film; the paper strip passes through the creasing device to form bending creasing on the paper strip; the paper strip continues to pass through... The packaging box is cut off from the paper tape using a die-cutting device; the printing device includes a frame and a pressure roller, a printing roller, a linkage mechanism, and a drive rotation mechanism mounted on the frame. The pressure roller is rotatably mounted on the frame. The linkage mechanism includes a first transmission gear, a second transmission gear, a second linkage shaft, a third linkage shaft, a first coupling structure, an eccentric wheel, and a support base. The axial directions of the second and third linkage shafts are parallel to the axial direction of the pressure roller and are located at opposite ends of the axial direction of the printing roller, respectively, and are rotatably mounted on the frame. Connections are provided between the second linkage shaft and the printing roller, and between the third linkage shaft and the printing roller. A universal coupling with extendable length is provided to allow the printing roller to move closer to or further away from the pressure roller. The first transmission gear is fixedly mounted on one axial end of the pressure roller, and the second transmission gear is rotatably mounted on the outer periphery of the second linkage shaft, with the first and second transmission gears meshing. The first coupling structure includes a coupling slide and a first cylinder. The coupling slide is slidably mounted on the second linkage shaft and rotates synchronously with the second linkage shaft. The first cylinder drives the coupling slide to slide. A first coupling portion is provided at the end of the second transmission gear facing the coupling slide, and the coupling slide faces the second... One end of the transmission gear is provided with a second coupling part. The coupling slide slides to make the first coupling part and the second coupling part cooperate to realize the synchronous rotation of the second transmission gear and the coupling slide. The coupling slide slides to make the first coupling part and the second coupling part disengage to release the synchronous rotation of the second transmission gear and the coupling slide. The active rotation mechanism is used to drive the third linkage shaft to rotate circumferentially. The eccentric wheel is fixedly installed on the printing roller. The support seat is installed on the frame and located below the eccentric wheel to support the eccentric wheel. The printing roller rotates and moves closer to or away from the pressure roller with the cooperation of the eccentric wheel and the support seat.

[0008] The invention is further configured such that: an ink pool and an inkjet printer are also provided on the frame; the ink pool is located below the printing roller and the bottom part of the printing roller is immersed in the ink pool so that the ink in the ink pool adheres to the surface of the printing roller; the inkjet printer is used to draw ink from the ink pool and spray it toward the surface of the printing roller so that the ink adheres to the surface of the printing roller.

[0009] The present invention is further configured such that: the linkage mechanism further includes a lifting mechanism, which is disposed on the frame and used to lift the support seat.

[0010] The present invention is further configured such that: the linkage mechanism further includes a third transmission gear and a transmission assembly; the third transmission gear is rotatably mounted on the outer periphery of the second linkage shaft, and the second and third transmission gears are located at both ends of the connecting slide; a third connecting part is provided at the end of the third transmission gear facing the connecting slide, and a fourth connecting part is provided at the end of the connecting slide facing the third transmission gear; the connecting slide slides to allow the third connecting part and the fourth connecting part to engage so as to realize synchronous rotation of the third transmission gear and the connecting slide; the connecting slide slides to disengage the third connecting part and the fourth connecting part to release the synchronous rotation of the third transmission gear and the connecting slide; the transmission assembly is used to engage the second and third transmission gears and to make the rotation directions of the second and third transmission gears opposite.

[0011] The present invention is further configured such that: the connecting slide has a first engagement state, a second engagement state, and a third engagement state; in the first engagement state, the first connecting shaft part and the second connecting shaft part are engaged, and the third connecting shaft part and the fourth connecting shaft part are disengaged; in the second engagement state, the first connecting shaft part and the second connecting shaft part are disengaged, and the third connecting shaft part and the fourth connecting shaft part are disengaged; in the third engagement state, the first connecting shaft part and the second connecting shaft part are disengaged, and the third connecting shaft part and the fourth connecting shaft part are engaged.

[0012] The present invention is further configured such that: the transmission assembly includes a transmission housing and a first transmission shaft, a second transmission shaft, a fourth transmission gear, a fifth transmission gear, a sixth transmission gear, and a seventh transmission gear disposed within the transmission housing; the first and second transmission shafts are rotatably mounted on the transmission housing; the fourth and fifth transmission gears are fixedly disposed on the first transmission shaft; the sixth and seventh transmission gears are fixedly disposed on the second transmission shaft; the fourth and second transmission gears mesh; the fifth and sixth transmission gears mesh; and the seventh transmission gear meshes with the third transmission gear; the transmission housing is detachably disposed on the frame.

[0013] The present invention is further configured such that: the first transmission gear, the second transmission gear, and the fourth transmission gear are spur gears or helical gears, and the third transmission gear, the fifth transmission gear, the sixth transmission gear, and the seventh transmission gear are bevel gears or bevel teeth; the first transmission shaft and the second linkage shaft are arranged in parallel, and the second transmission shaft and the second linkage shaft are arranged in perpendicular.

[0014] The present invention is further configured such that: a plurality of coupling slots are arranged circumferentially on the outer periphery of the first coupling portion and the third coupling portion; the second coupling portion and the fourth coupling portion are cylindrical in shape to fit the outer periphery of the first coupling portion and the third coupling portion; a plurality of coupling inserts are arranged circumferentially on the inner periphery of the second coupling portion and the fourth coupling portion; each coupling slot and coupling insert is an elongated strip extending axially along the second linkage shaft; each coupling slot is provided with an insertion port for inserting the coupling insert, each insertion port is flared; each coupling insert is provided with an insertion end for inserting into the coupling slot, each insertion end is constricted.

[0015] The present invention is further configured such that: the active rotation mechanism includes a mating slide, a second cylinder, a second motor, a first connecting plate, and a second connecting disc; the mating slide is slidably mounted on the frame along the axial direction of the third linkage shaft; the second cylinder drives the mating slide to slide; the second motor is fixedly mounted on the mating slide; the first connecting disc is fixedly mounted on the third linkage shaft; the second connecting disc is fixedly mounted on the output shaft of the second motor; the first connecting disc has a first locking tooth arranged circumferentially on the side facing the second connecting disc; the second connecting disc has a second locking tooth arranged circumferentially on the side facing the first connecting disc; the second cylinder drives the mating slide to slide so that the first connecting disc and the second connecting disc engage through the first locking tooth and the second locking tooth, thereby achieving synchronous rotation of the output shaft of the second motor and the third linkage shaft; the second cylinder drives the mating slide to slide so that the first connecting disc and the second connecting disc separate, thereby achieving disengagement of the output shaft of the second motor and the third linkage shaft.

[0016] The present invention is further configured such that: a first motor is provided on the frame, and the output shaft of the first motor is connected to the end of the pressure roller opposite to the first transmission gear to drive the pressure roller to rotate.

[0017] By adopting the above technical solutions, 1. When batch and rapid printing is required, the printing roller used is a circumferentially evenly patterned printing roller. The eccentric wheel is changed to a concentric wheel, and the concentric wheel is supported by the support seat to ensure that the printing roller always presses against the pressure roller. The first cylinder ensures that the connecting slide and the second transmission gear are always engaged, thereby achieving synchronous movement of the pressure roller and the printing roller under the cooperation of the first and second transmission gears to continuously print on the transmitted paper tape without stopping the machine, which is the same as the existing traditional printing method. 2. When small-batch and special printing is required, the printing roller is only engraved with patterns in some areas, while the rest does not need to be engraved, which makes the production cost of the printing roller lower. The cooperation of the eccentric wheel and the support seat makes the maximum radius section of the eccentric wheel cooperate with the support seat to lift the printing roller upward to press the paper tape on the pressure roller. Under the action of the first connecting shaft structure, the second linkage shaft and the second transmission gear can be circumferentially limited. The printing roller and the pressure roller rotate synchronously under the cooperation of the first and second transmission gears, and the engraved pattern is printed during the rotation. After the engraved pattern is printed, the eccentric wheel rotates to a position with a radius smaller than the maximum radius and cooperates with the support seat. Under the action of gravity, the printing roller will disengage from the paper tape and stop printing. Then, the first cylinder can drive the connecting shaft slide to disengage the first and second connecting shafts. Then, the operation of the active rotation mechanism allows the printing roller to rotate independently of the pressure roller and pass over the unengraved pattern to start the next cycle. During this period, the pressure roller can be driven to rotate to transfer the paper tape to the next process, so that a gap is formed between the two imprinted patterns on the paper tape. Alternatively, the pressure roller can be kept stationary to eliminate the gap between the two imprinted patterns, thus solving the defect that the gap between the two imprinted patterns cannot be adjusted in the existing printing process, making the printing more diverse. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram illustrating a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the printing apparatus in a specific embodiment of the present invention; Figure 3 This is a cross-sectional view of a portion of the structure of the printing apparatus in a specific embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of part of the image; Figure 5 for Figure 3 Enlarged view of part of the image; Figure 6 for Figure 3 Enlarged view of part of the image; Figure 7 This is a perspective sectional view of the connecting slide in a specific embodiment of the present invention; Figure 8 This is a perspective view of the third transmission gear in a specific embodiment of the present invention; Figure 9 This is a perspective view of the first connecting disk in a specific embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Rack; 11. First motor; 2. Pressure roller; 3. Printing roller; 4. Linkage mechanism; 41. First transmission gear; 42. Second transmission gear; 43. Second linkage shaft; 44. Third linkage shaft; 45. First coupling structure; 46. Eccentric wheel; 47. Support base; 48. Lifting mechanism; 49. Third transmission gear; 421. First coupling part; 431. Hexagonal prism segment; 451. Connecting slide; 453. Carrier; 4511, Second coupling part; 4512, Fourth coupling part; 4513, Through hole; 491. Third coupling section; 5. Active rotation mechanism; 51. Matching slide; 52. Second cylinder; 53. Second motor; 54. First connecting plate; 55. Second connecting plate; 541. First locking tooth; 551. Second locking tooth; 6. Universal coupling; 7. Transmission components; 71. First drive shaft; 72. Second drive shaft; 73. Fourth drive gear; 74. Fifth drive gear; 75. Sixth drive gear; 76. Seventh drive gear; 81. Ink reservoir; 82. Inkjet printer; 83. Squeegee; 84. Baffle; 85. Coupling slot; 86. Coupling insert; 851. Insertion port; 861. Insertion end; 91. Unwinding mechanism; 92. Printing device; 93. Drying device; 94. Coating device; 95. Creasing device; 96. Die-cutting device; 97. Rewinding mechanism; 98. Conveying device. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention and to more clearly define the scope of protection of the present invention, the present invention will be described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present invention, and are merely a part of the embodiments of the present invention. The specific and direct descriptions of related structures are only for the convenience of understanding the present invention, and the specific features do not necessarily or directly limit the scope of the present invention. Conventional choices and substitutions made by those skilled in the art under the guidance of the present invention should be considered within the scope of protection of the present invention.

[0022] like Figures 1-9 As shown, this invention discloses an automated packaging box production line, including an unwinding mechanism 91, three printing devices 92, three drying devices 93, a laminating device 94, a creasing device 95, two die-cutting devices 96, a winding mechanism 97, and two conveying devices 98. The unwinding device is located on the far left, and a conveying device 98 is positioned to the right of the unwinding device to hold the roll of paper supplied by the unwinding device. Driven by the conveying device 98, the roll of paper is rotated and output as a continuous paper strip. Then, the three printing devices 92 are arranged in a row, and the three drying devices 93 are respectively positioned on the three printing devices 92, so that the paper strip passes through each printing device 92 for drying. The printing process forms a pattern layer, and before the paper tape is output from the corresponding printing device 92, the ink printed on the paper tape is dried by the drying device 93 on the printing device 92. After the printing device 92, a transmission device 98 is set up so that the two transmission devices 98 can transfer between the printing devices 92 to ensure good transmission of the paper tape between the printing devices 92 and to ensure printing accuracy. Then, a laminating device 94, a creasing device 95, and a die-cutting device 96 are set up to sequentially laminate, creasing, and cut the printed paper tape to obtain packaging box cardboard. On the far right, a winding mechanism 97 is set up to wind up the waste tape obtained after cutting the packaging box cardboard.

[0023] Specifically, the conveying device 98 adopts an upper and lower roller group configuration, which allows the upper and lower roller groups to rotate in opposite directions to convey the paper tape to the right.

[0024] The drying device 93 can be dried with hot air or with ultraviolet light, depending on the actual situation. In this embodiment, UV ink is used to print on the paper tape and ultraviolet light is used for drying.

[0025] Specifically, the laminating device 94 uses an upper film output from the upper film roll, a lower film output from the lower mold roll, and a printed paper tape to simultaneously input the upper and lower roller groups to apply the upper and lower films to the upper and lower sides of the paper tape.

[0026] The creasing device 95 and the die-cutting device 96 can employ an upper and lower roller assembly to create creasing marks on the paper tape or cut the packaging box cardboard off the paper tape during the paper tape transport process. Alternatively, the creasing device 95 and the die-cutting device 96 can also employ an upper and lower die set to clamp the paper tape to create creasing marks on the paper tape or cut the packaging box cardboard off the paper tape. The upper and lower roller assembly for creasing and die-cutting is more commonly used in continuous printing, while the upper and lower die set for creasing and die-cutting is more commonly used in printing with irregular layouts.

[0027] Preferably, the printing apparatus 92 in this embodiment includes a frame 1 and a pressure roller 2, a printing roller 3, a linkage mechanism 4, and a drive rotation mechanism 5 mounted on the frame 1. The pressure roller 2 is rotatably mounted on the frame 1 along its axial direction using bearings at both ends. The linkage mechanism 4 includes a first transmission gear 41, a second transmission gear 42, a second linkage shaft 43, a third linkage shaft 44, a first coupling structure 45, an eccentric wheel 46, and a support base 47. The axial directions of the second linkage shaft 43 and the third linkage shaft 44 are parallel to the axial direction of the pressure roller 2 and are located at the two ends of the axial direction of the printing roller 3, respectively. They are rotatably mounted on the frame 1 using bearings. A universal coupling 6 with a length that can be extended is provided between the second linkage shaft 43 and the printing roller 3, as well as between the third linkage shaft 44 and the printing roller 3, so that the printing roller 3 can move closer to or away from the pressure roller 2. The first transmission gear 41 is fixedly set at one end of the axial direction of the pressure roller 2 by key connection. The second transmission gear 42 is rotatably mounted on the outer periphery of the second linkage shaft 43 by means of a copper sleeve or bearing, and the first transmission gear 41 and the second transmission gear 42 mesh. The first coupling structure 45 includes a coupling slide 451 and a first cylinder. The coupling slide 451 is slidably mounted on the second linkage shaft 43 and rotates synchronously with the second linkage shaft 43. The first cylinder drives the coupling slide 451 to slide. A first coupling portion 421 is provided at one end of the second transmission gear 42 facing the coupling slide 451, and a second coupling portion 4511 is provided at the other end of the coupling slide 451 facing the second transmission gear 42. The coupling slide 451 slides to engage the first coupling portion 421 and the second coupling portion 4511 to achieve synchronous rotation of the second transmission gear 42 and the coupling slide 451. The coupling slide 451 also slides to disengage the first coupling portion 421 and the second coupling portion 4511 to release the synchronous rotation of the second transmission gear 42 and the coupling slide 451. The active rotation mechanism 5 drives the third linkage shaft 44 to rotate circumferentially. The eccentric wheel 46 is fixedly mounted on the printing roller 3, and the support seat 47 is mounted on the frame 1 and located below the eccentric wheel 46 to support it. The printing roller 3 rotates and moves closer to or further away from the pressure roller 2 with the cooperation of the eccentric wheel 46 and the support seat 47.

[0028] Therefore, 1. When batch and rapid printing is required, the printing roller 3 used is a circumferentially evenly patterned printing roller 3. The eccentric wheel 46 is changed to a concentric wheel, and the concentric wheel is supported by the support seat 47 to ensure that the printing roller 3 always presses against the pressure roller 2. The first cylinder ensures that the connecting slide 451 and the second transmission gear 42 are always engaged, so that the pressure roller 2 and the printing roller 3 move synchronously under the cooperation of the first transmission gear 41 and the second transmission gear 42 to continuously print on the paper tape without stopping the machine, which is the same as the existing traditional printing method. 2. When a small amount of special printing is required, the printing roller 3 is only engraved in some areas, while the rest does not need to be engraved, which makes the production cost of the printing roller 3 lower. The cooperation of the eccentric wheel 46 and the support seat 47 makes the maximum radius section of the eccentric wheel 46 cooperate with the support seat 47 to lift the printing roller 3 upward to press the paper tape on the pressure roller 2. Under the action of the first connecting shaft structure 45, the second linkage shaft 43 and the second transmission gear 42 can be circumferentially limited. The printing roller 2 and printing roller 3 rotate synchronously under the cooperation of the first transmission gear 41 and the second transmission gear 42, and the engraved pattern is printed during the rotation. After the engraved pattern is printed, the eccentric wheel 46 rotates to a position with a radius smaller than the maximum radius and cooperates with the support seat 47. Under the action of gravity, the printing roller 3 will disengage from the paper tape and stop printing. Then, the first cylinder can drive the connecting slide 451 to slide, thereby disengaging the first connecting shaft part 421 and the second connecting shaft part 4511. Then, the operation of the active rotation mechanism 5 allows the printing roller 3 to rotate independently of the pressure roller 2 and pass over the unengraved pattern part to start the next cycle. During this period, the pressure roller 2 can be driven to rotate to transfer the paper tape to the next process, so that a gap is formed between the two printed patterns on the paper tape. Alternatively, the pressure roller 2 can be kept stationary during this period to prevent the gap from being formed between the two printed patterns, thus solving the defect that the gap between the two printed patterns cannot be adjusted in the existing printing process, making the printing more diverse.

[0029] Specifically, a hexagonal prism-shaped through hole 4513 is opened on the inner circumference of the connecting slide 451, and the second linkage shaft 43 is provided with a hexagonal prism segment 431 that matches the shape of the aforementioned through hole 4513. Through the cooperation of the two, the connecting slide is slidably mounted on the second linkage shaft 43 and can rotate with the second linkage shaft 43.

[0030] In addition, a carrier 453 is set on the outer periphery of the connecting slide 451. The two are installed by bearings so that the connecting slide 451 can rotate circumferentially relative to the carrier 453. The carrier 453 slides in the front and back direction to fit the frame 1 by means of a slide rail, and the sliding of the connecting slide 451 is achieved by driving the carrier 453 to slide through the first cylinder.

[0031] Preferably, in this embodiment, there are two sets of eccentric wheels 46 and support seats 47, located on both sides of the axial direction of the printing roller 3. The eccentric wheels 46 are fixedly installed at the end of the printing roller 3 by bolts. In addition, the support seats 47 are L-shaped. One L-shaped section of the support seats 47 is located below the eccentric wheels 46 to support the eccentric wheels 46, and the other L-shaped section of the eccentric wheels 46 is located on the side of the eccentric wheels 46 away from the printing roller 3 to axially limit the printing roller 3, thereby preventing the axial displacement of the printing roller 3 due to the connection of the telescopic universal coupling 6 from affecting the printing accuracy.

[0032] Preferably, the linkage mechanism 4 in this embodiment further includes a lifting mechanism 48, which is disposed on the frame 1 and used to lift the support base 47. Therefore, after the pattern on the printing roller 3 is printed and the printing roller 3 and pressure roller 2 are separated under the action of the eccentric wheel 46 and the support base 47, the printing roller 3 can be further lowered by the lifting mechanism 48 and rotated in the opposite direction under the action of the active rotation mechanism 5. Specifically, for printing rollers 3 with a pattern curvature greater than Π, forward rotation is used to achieve reset more quickly for the next printing, while for printing rollers 3 with a pattern curvature less than Π, reverse rotation is used to achieve reset more quickly for the next printing.

[0033] Specifically, the lifting mechanism 48 uses a cylinder.

[0034] Furthermore, the linkage mechanism 4 in this embodiment also includes a third transmission gear 49 and a transmission assembly 7. The third transmission gear 49 is rotatably mounted on the outer periphery of the second linkage shaft 43 by means of a copper sleeve or bearing. The second transmission gear 42 and the third transmission gear 49 are located at both ends of the connecting slide 451. In addition, a third connecting part 491 is provided at one end of the third transmission gear 49 facing the connecting slide 451, and a fourth connecting part 4512 is provided at one end of the connecting slide 451 facing the third transmission gear 49. The connecting slide 451 slides to make the third connecting part 491 and the fourth connecting part 4512 cooperate to realize the synchronous rotation of the third transmission gear 49 and the connecting slide 451. The connecting slide 451 slides to make the third connecting part 491 and the fourth connecting part 4512 disengage to release the synchronous rotation of the third transmission gear 49 and the connecting slide 451. The transmission assembly 7 is used to mesh the second transmission gear 42 and the third transmission gear 49 and make the rotation directions of the second transmission gear 42 and the third transmission gear 49 opposite.

[0035] Therefore, in addition to using the active rotation mechanism 5 to reverse the printing roller 3, the third transmission gear 49 can also be used to achieve the reverse rotation. Specifically, after the pattern on the printing roller 3 is printed, the first cylinder drives the connecting slide 451 to slide, thereby disengaging the first connecting shaft 421 and the second connecting shaft 4511, and engaging the third connecting shaft 491 and the fourth connecting shaft 4512. The lifting mechanism 48 lowers the printing roller 3 downwards to ensure that the printing roller 3 does not contact the paper belt during the reverse rotation. Then, the rotation of the pressure roller 2 synchronously drives the printing roller 3 to rotate, and the two rotate in the same direction. That is, the printing roller 3 rotates in the opposite direction to the printing roller when it rotates to the next printing position, and stops rotating when the printing roller 3 rotates to the next printing position. At this time, the lifting mechanism 48 drives the support seat 47 to rise to the original position so that the printing roller 3 can press onto the paper tape. Then, the first cylinder drives the connecting slide 451 to slide and release the cooperation between the third connecting part 491 and the fourth connecting part 4512, and make the first connecting part 421 and the second connecting part 4511 cooperate to work for the next printing. It should be noted that this method has fewer driving sources, but there must be a gap between the two printed patterns.

[0036] As can be seen from the above structure, the coupling slide 451 has a first engagement state, a second engagement state, and a third engagement state; in the first engagement state, the first coupling part 421 and the second coupling part 4511 are engaged, while the third coupling part 491 and the fourth coupling part 4512 are disengaged; in the second engagement state, the first coupling part 421 and the second coupling part 4511 are disengaged, while the third coupling part 491 and the fourth coupling part 4512 are disengaged, that is... Figure 3 The state shown; in the third engagement state, the first coupling part 421 and the second coupling part 4511 are disengaged, and the third coupling part 491 and the fourth coupling part 4512 are engaged.

[0037] Preferably, the transmission assembly 7 in this embodiment includes a transmission housing (not shown in the figure) and a first transmission shaft 71, a second transmission shaft 72, a fourth transmission gear 73, a fifth transmission gear 74, a sixth transmission gear 75, and a seventh transmission gear 76 disposed within the transmission housing. The first transmission shaft 71 and the second transmission shaft 72 are rotatably mounted on the transmission housing. The fourth transmission gear 73 and the fifth transmission gear 74 are fixedly disposed on the first transmission shaft 71. The sixth transmission gear 75 and the seventh transmission gear 76 are fixedly disposed on the second transmission shaft 72. The fourth transmission gear 73 meshes with the second transmission gear 42, the fifth transmission gear 74 meshes with the sixth transmission gear 75, and the seventh transmission gear 76 meshes with the third transmission gear 49. The transmission housing is detachably disposed on the frame 1.

[0038] Therefore, the transmission structure formed by the linked fourth transmission gear 73, fifth transmission gear 74, sixth transmission gear 75, and seventh transmission gear 76 links the second transmission gear 42 and the third transmission gear 49 to achieve opposite rotation directions of the second transmission gear 42 and the third transmission gear 49 to achieve reverse output, and the transmission component 7 is the simplest.

[0039] Preferably, in this embodiment, the first transmission gear 41, the second transmission gear 42, and the fourth transmission gear 73 are spur gears or helical gears, and the third transmission gear 49, the fifth transmission gear 74, the sixth transmission gear 75, and the seventh transmission gear 76 are bevel gears or bevel teeth; the first transmission shaft 71 and the second linkage shaft 43 are arranged in parallel, and the second transmission shaft 72 and the second linkage shaft 43 are arranged in perpendicular, making the overall structure simpler. Moreover, the bevel gear combination can realize the setting of different transmission ratios, thereby controlling the spacing between the two printed patterns. Specifically, a detachable transmission housing with different transmission ratios is used in conjunction with the frame 1 to input different transmission ratios.

[0040] It should be noted that when using a copper sleeve, it is also necessary to position both ends of the copper sleeve axially to prevent the second transmission gear 42 and the third transmission gear 49 from moving axially.

[0041] In addition, the rack 1 is also equipped with an ink tank 81 and an inkjet printer 82.

[0042] The ink pool 81 is located below the printing roller 3 and the bottom part of the printing roller 3 is immersed in the ink pool 81 so that the ink in the ink pool 81 adheres to the surface of the printing roller 3. The frame 1 is also equipped with a scraper 83 to make the ink used for printing on the printing roller 3 more uniform. The ink pool 81 mainly supplies ink for two methods: continuous printing and forward rotation reset printing roller 3.

[0043] The inkjet printer 82 includes a pipe extending along the axial direction of the printing roller 3. Multiple nozzles are arranged along the length of the pipe. In addition, the pipe is also provided with a suction tube that extends into the ink pool 81. The ink in the ink pool 81 is pumped out sequentially through the suction tube, the pipe, and the nozzles so that the ink adheres to the surface of the printing roller 3. Thus, the part of the printing roller 3 with the pattern does not need to go through the ink pool 81 for ink adhesion and can be directly reversed and reset.

[0044] In addition, a baffle 84 is provided above the nozzle to prevent ink from splashing onto the paper tape.

[0045] Specifically, in this embodiment, the first connecting shaft portion 421 and the third connecting shaft portion 491 are provided with a plurality of connecting shaft slots 85 arranged circumferentially on their outer periphery. Correspondingly, the second connecting shaft portion 4511 and the fourth connecting shaft portion 4512 are cylindrical in shape to fit the outer periphery of the first connecting shaft portion 421 and the third connecting shaft portion 491, and a plurality of connecting shaft inserts 86 are arranged on the inner periphery of the second connecting shaft portion 4511 and the fourth connecting shaft portion 4512. Each connecting shaft slot 85 and each connecting shaft insert 86 is an elongated strip extending axially along the second linkage shaft 43.

[0046] Therefore, when the connecting slide 451 slides so that the second connecting part 4511 is close to the first connecting part 421, or the fourth connecting part 4512 is close to the third connecting part 491, the cylindrical second connecting part 4511 is sleeved on the outer periphery of the first connecting part 421 or the fourth connecting part 4512 is sleeved on the outer periphery of the third connecting part 491, and then the alignment connection is achieved by the insertion and cooperation of multiple connecting strips and connecting slots.

[0047] Preferably, each coupling slot 85 is provided with an insertion port 851 for inserting a coupling insert 86, and each insertion port 851 is flared. Each coupling insert 86 is provided with an insertion end 861 for inserting into the coupling slot 85, and each insertion end 861 is constricted, so that the insertion and engagement of the coupling slot 85 and the coupling insert 86 is smoother.

[0048] Specifically, the active rotation mechanism 5 in this embodiment includes a mating slide 51, a second cylinder 52, a second motor 53 (servo motor), a first connecting plate 54, and a second connecting plate 55. The mating slide 51 is slidably mounted on the frame 1 along the axial direction of the third linkage shaft 44 using a guide rail. The second cylinder 52 is mounted on the frame 1, and the output shaft of the second cylinder 52 is connected to the mating slide 51 to drive the mating slide 51 to slide. The second motor 53 is fixedly mounted on the mating slide 51. The first connecting plate 54 is fixedly mounted on the third linkage shaft 44, and the second connecting plate 55 is fixedly mounted on the output shaft of the second motor 53. A first locking tooth portion 541 is arranged circumferentially on the side of the first connecting plate 54 facing the second connecting plate 55, and a second locking tooth portion 551 is arranged circumferentially on the side of the second connecting plate 55 facing the first connecting plate 54. A second cylinder 52 drives the mating slide 51 to slide, causing the first connecting plate 54 and the second connecting plate 55 to engage through the first locking tooth portion 541 and the second locking tooth portion 551, thereby achieving synchronous rotation of the output shaft of the second motor 53 and the third linkage shaft 44. The second cylinder 52 also drives the mating slide 51 to slide, causing the first connecting plate 54 and the second connecting plate 55 to separate, thereby disengaging the output shaft of the second motor 53 and the third linkage shaft 44. This allows the sliding mating slide 51, driven by the second cylinder 52, to connect or disconnect the second motor 53 and the third linkage shaft 44, ensuring that the second motor 53 is only engaged when it is needed to drive the printing roller 3, preventing damage from prolonged idle operation.

[0049] Preferably, in this embodiment, a first motor 11 (servo motor) is provided on the frame 1. The output shaft of the first motor 11 is connected to the end of the pressure roller 2 away from the first transmission gear 41 to drive the pressure roller 2 to rotate, so that one end of the pressure roller 2 is set by the first transmission gear 41 to cooperate with the linkage mechanism 4 below, while the other end is set by the first motor 11 to make the overall structure more orderly and compact.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automated production line for packaging boxes, characterized in that, include: Unwinding mechanism (91), multi-piece printing device (92), multi-piece drying device (93), laminating device (94), creasing device (95), die-cutting device (96) and conveying device (98); The unwinding mechanism (91) provides a roll of paper and, driven by the conveying device (98), outputs the roll of paper as a continuous paper strip by rotating. The paper strip passes through each printing device (92) to print a pattern layer. The paper strip passes through a drying device (93) to dry the ink printed on the paper strip. The paper strip passes through a laminating device (94) to coat the surface of the pattern layer with a protective film. The paper strip passes through a creasing device (95) to form bending creasing on the paper strip. The paper strip passes through a die-cutting device (96) to cut the packaging box cardboard from the paper strip. The printing device (92) includes a frame (1) and a pressure roller (2), a printing roller (3), a linkage mechanism (4), and a drive rotation mechanism (5) mounted on the frame (1). The pressure roller (2) is rotatably mounted on the frame (1). The linkage mechanism (4) includes a first transmission gear (41), a second transmission gear (42), a second linkage shaft (43), a third linkage shaft (44), a first coupling structure (45), an eccentric wheel (46), and a support seat (47). The axial directions of the second linkage shaft (43) and the third linkage shaft (44) are parallel to the axial direction of the pressure roller (2) and are located on the printing roller (3), respectively. The first drive gear (41) is fixedly mounted on one axial end of the pressure roller (2), and the second drive gear (42) is rotatably mounted on the outer periphery of the second drive shaft (43), and the first drive gear (41) meshes with the second drive shaft (42). The first coupling structure (45) includes a coupling slide (451) and a first cylinder. The connecting slide (451) is slidably mounted on the second linkage shaft (43) and rotates synchronously with the second linkage shaft (43). The first cylinder is used to drive the connecting slide (451) to slide. The second transmission gear (42) has a first connecting part (421) at one end facing the connecting slide (451), and the connecting slide (451) has a second connecting part (4511) at one end facing the second transmission gear (42). The connecting slide (451) slides so that the first connecting part (421) and the second connecting part (4511) cooperate to realize the second transmission gear (42) and the connecting slide (451). The synchronous rotation of the connecting slide (451) causes the first connecting part (421) and the second connecting part (4511) to disengage, thereby releasing the synchronous rotation of the second transmission gear (42) and the connecting slide (451). The active rotation mechanism (5) is used to drive the third linkage shaft (44) to rotate circumferentially. The eccentric wheel (46) is fixedly mounted on the printing roller (3). The support seat (47) is mounted on the frame (1) and located below the eccentric wheel (46) to support the eccentric wheel (46). The printing roller (3) rotates and moves closer to or away from the pressure roller (2) with the cooperation of the eccentric wheel (46) and the support seat (47). The linkage mechanism (4) further includes a third transmission gear (49) and a transmission assembly (7). The third transmission gear (49) is rotatably mounted on the outer periphery of the second linkage shaft (43), and the second transmission gear (42) and the third transmission gear (49) are located at both ends of the connecting slide (451). The end of the third transmission gear (49) facing the connecting slide (451) is provided with a third connecting part (491), and the end of the connecting slide (451) facing the third transmission gear (49) is provided with a fourth connecting part (4512). The sliding mechanism allows the third coupling (491) and the fourth coupling (4512) to engage so that the third transmission gear (49) and the coupling slide (451) rotate synchronously. The sliding mechanism (451) allows the third coupling (491) and the fourth coupling (4512) to disengage so that the third transmission gear (49) and the coupling slide (451) can rotate synchronously. The transmission assembly (7) is used to engage the second transmission gear (42) and the third transmission gear (49) and make the rotation directions of the second transmission gear (42) and the third transmission gear (49) opposite. The connecting slide (451) has a first mating state, a second mating state, and a third mating state; In the first engagement state, the first coupling part (421) and the second coupling part (4511) engage, while the third coupling part (491) and the fourth coupling part (4512) disengage. In the second engagement state, the first coupling part (421) and the second coupling part (4511) are disengaged, and the third coupling part (491) and the fourth coupling part (4512) are disengaged. In the third engagement state, the first coupling part (421) and the second coupling part (4511) disengage, and the third coupling part (491) and the fourth coupling part (4512) engage. The first connecting shaft part (421) and the third connecting shaft part (491) are provided with a plurality of connecting shaft slots (85) arranged circumferentially on their outer periphery. The second connecting shaft part (4511) and the fourth connecting shaft part (4512) are cylindrical in shape to fit the outer periphery of the first connecting shaft part (421) and the third connecting shaft part (491). The inner periphery of the second connecting shaft part (4511) and the fourth connecting shaft part (4512) is provided with a plurality of connecting shaft inserts (86). Each of the aforementioned coupling slots (85) and coupling inserts (86) is an elongated strip extending axially along the second linkage shaft (43); Each of the coupling slots (85) is provided with an insertion port (851) for inserting a coupling insert (86), each of the insertion ports (851) is flared, and each of the coupling inserts (86) is provided with an insertion end (861) for inserting into the coupling slot (85), each of the insertion ends (861) is constricted. The active rotation mechanism (5) includes a mating slide (51), a second cylinder (52), a second motor (53), a first connecting plate (54), and a second connecting plate (55). The mating slide (51) is slidably mounted on the frame (1) along the axial direction of the third linkage shaft (44). The second cylinder (52) is used to drive the mating slide (51) to slide. The second motor (53) is fixedly mounted on the mating slide (51). The first connecting plate (54) is fixedly mounted on the third linkage shaft (44). The second connecting plate (55) is fixedly mounted on the output shaft of the second motor (53). The first connecting plate (54) has a first locking tooth (541) arranged circumferentially on the side facing the second connecting plate (55). The second connecting plate (55) has a second locking tooth (551) arranged circumferentially on the side facing the first connecting plate (54). The second cylinder (52) drives the sliding block (51) to slide so that the first connecting plate (54) and the second connecting plate (55) are engaged by the first locking tooth (541) and the second locking tooth (551) to realize the synchronous rotation of the output shaft of the second motor (53) and the third linkage shaft (44); The second cylinder (52) drives the sliding block (51) to slide so that the first connecting plate (54) and the second connecting plate (55) are separated, thereby disengaging the output shaft of the second motor (53) and the third linkage shaft (44).

2. The automated packaging box production line according to claim 1, characterized in that: The frame (1) is also equipped with an ink tank (81) and an inkjet printer (82). The ink pool (81) is located below the printing roller (3) and the bottom part of the printing roller (3) is immersed in the ink pool (81) so that the ink in the ink pool (81) adheres to the surface of the printing roller (3); The inkjet printer (82) is used to draw ink from the ink pool (81) and spray it onto the surface of the printing roller (3) so that the ink adheres to the surface of the printing roller (3).

3. The automated packaging box production line according to claim 1, characterized in that: The linkage mechanism (4) also includes a lifting mechanism (48), which is mounted on the frame (1) and used to lift the support base (47).

4. The automated packaging box production line according to claim 1, characterized in that: The transmission assembly (7) includes a transmission housing and a first transmission shaft (71), a second transmission shaft (72), a fourth transmission gear (73), a fifth transmission gear (74), a sixth transmission gear (75), and a seventh transmission gear (76) disposed within the transmission housing. The first transmission shaft (71) and the second transmission shaft (72) are rotatably mounted on the transmission housing. The fourth transmission gear (73) and the fifth transmission gear (74) are fixedly disposed on the first transmission shaft (71). The sixth transmission gear (75) and the seventh transmission gear (76) are fixedly disposed on the second transmission shaft (72). The fourth transmission gear (73) meshes with the second transmission gear (42), the fifth transmission gear (74) meshes with the sixth transmission gear (75), and the seventh transmission gear (76) meshes with the third transmission gear (49). The transmission housing is detachably mounted on the frame (1).

5. The automated packaging box production line according to claim 4, characterized in that: The first transmission gear (41), the second transmission gear (42), and the fourth transmission gear (73) are spur gears or helical gears, and the third transmission gear (49), the fifth transmission gear (74), the sixth transmission gear (75), and the seventh transmission gear (76) are bevel gears or bevel teeth. The first drive shaft (71) and the second linkage shaft (43) are arranged in parallel, and the second drive shaft (72) and the second linkage shaft (43) are arranged in perpendicular.

6. The automated packaging box production line according to any one of claims 1-5, characterized in that: The frame (1) is provided with a first motor (11), and the output shaft of the first motor (11) is connected to the end of the pressure roller (2) away from the first transmission gear (41) to drive the pressure roller (2) to rotate.

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