A paperboard printing apparatus

Abstract

The application relates to the paperboard printing processing technical field, in particular to a paperboard printing device which comprises a rack, a supporting unit, a separation unit, a transmission unit and a printing unit, the supporting unit is fixedly connected with the rack and is provided with a negative pressure supporting end, the separation unit is fixedly connected with the rack and is provided with a separation end, the separation end is provided with a first working position and a second working position, the transmission unit is provided with two groups of transmission assemblies fixedly connected with the rack, the transmission assemblies are symmetrically arranged with the separation unit as a center line, the transmission assemblies are provided with split transmission channels, two groups of the split transmission channels are combined to form an integrated transmission channel, and the printing unit is fixedly connected with the rack and is provided with a printing end. The paperboard printing device moves and prints small-size paperboards through the cooperation of the split transmission channels, the separation unit and the printing unit, realizes the synchronous printing of two groups of small-size paperboards, and reduces the printing time of the small-size paperboards.

Description

Technical Field

[0001] This invention relates to the field of paperboard printing and processing technology, and more particularly to a paperboard printing device. Background Technology

[0002] Cardboard is a common material, mainly used to make cardboard boxes.

[0003] Currently, due to the influence of product appearance and size, cardboard usually needs to be cut into various specifications to meet production needs. During the cardboard processing, due to the technical requirements, patterns or text need to be sprayed onto the surface of the cardboard. Existing printing equipment requires manual placement of the cardboard onto the fixture for positioning before printing. Although this printing method is usable, the long time required for manual positioning results in low printing efficiency.

[0004] To address the aforementioned technical problems, a paperboard printing device was disclosed in patent application CN202120541306.3, filed on March 16, 2021. While this patent is usable, the paperboard printing process suffers from low efficiency because the transport channel can only hold one sheet at a time during printing. Different sizes of paperboard can only be placed into the transport channel one sheet at a time for printing. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a paperboard printing device to solve the problem that the transport channel of the printing device can only position one paperboard at a time, and paperboards of different specifications can only be placed into the transport channel one by one for printing, resulting in low paperboard printing efficiency.

[0006] To achieve the above objectives, the present invention provides a cardboard printing apparatus, comprising: a frame; a support unit fixedly connected to the frame and having a negative pressure support end for supporting the cardboard; a separating unit fixedly connected to the frame and having a vertically movable separating end, the separating end having a first working position and a second working position; a transmission unit having two sets of transmission components fixedly connected to the frame, the transmission components being symmetrically arranged with the separating unit as the center line, each transmission component having a separate transmission channel for driving the cardboard to move, the two sets of separate transmission channels being combined to form an integrated transmission channel; and a printing unit fixedly connected to the frame and having a printing end capable of moving perpendicular to the integrated transmission channel; when the separating end is located in the first working position, the separating end is located within the integrated transmission channel, the two sets of cardboard move through the separate transmission channels, and the printing end independently prints the cardboard within the separate transmission channels; when the separating end is located in the second working position, the separating end is located below the integrated transmission channel, the cardboard moves through the integrated transmission channel, and the printing end prints the cardboard within the integrated transmission channel.

[0007] In an optional example, the partition unit includes a partition base fixedly connected to the frame, a partition telescopic cylinder fixedly attached to the lower end of the partition base, a partition bracket including a partition bracket that is vertically connected to the partition base by means of sliding, and the telescopic end of the partition telescopic cylinder being fixedly connected to the partition bracket.

[0008] In an optional example, a separation drive shaft and a separation driven shaft are rotatably fixed on the separation bracket. An active bracket is fixed on the outer wall of the separation drive shaft, and a driven bracket is fixed on the outer wall of the separation driven shaft. Two sets of symmetrically arranged push brackets are installed between the active bracket and the driven bracket by rotational connection. The active bracket, the driven bracket, and the push brackets combine to form a parallelogram mechanism. A push plate that can move toward or away from the split transmission channel is fixed on the push bracket. A power component is installed on the separation base. The power component is driven and connected to the separation drive shaft and is used to rotate the separation drive shaft.

[0009] In an optional example, the power assembly includes a power motor, a driven gear, a driven ring, a power gear, and a power shaft. The power motor is fixedly connected to the partition base, the power gear is fixed to the output shaft of the power motor, the driven ring is rotatably connected to the partition base, the rotation centerline of the driven ring is vertically arranged, the driven ring is fixedly connected to the driven gear, the driven gear meshes with the power gear, the driven gear has a splined groove that passes through the driven gear, the power shaft is slidably inserted into the splined groove and drivenly connected to the splined groove by a key connection, and the top of the power shaft is fixedly connected to the partition drive shaft and is used to drive the partition drive shaft to rotate.

[0010] In an optional example, a resilient connector is fixed to the top of the drive shaft. The resilient connector is connected to the lower end of the separation drive shaft. The resilient connector includes a connecting seat, a resilient drive plate, and a retaining ring. The connecting seat is fixedly connected to the lower end of the separation drive shaft, and the resilient drive plate is fixedly connected to the top of the drive shaft. The resilient drive plate has several extensions extending in all four directions. The connecting seat has several openings at one end facing the resilient drive plate that match the extensions. The retaining ring is fixedly connected to the connecting seat and fixes the extensions in the connecting slots.

[0011] In an optional example, the transmission assembly includes a transmission bracket fixedly connected to a frame. The transmission bracket has a side limiting end at the end facing away from the separating unit. The push plate can push the cardboard to move in the direction of the corresponding side limiting end. A transmission drive shaft and a transmission driven shaft are fixedly fixed on the transmission bracket by a rotatable connection. A plurality of drive pulleys are fixed on the outer wall of the transmission drive shaft along the axial direction of the transmission drive shaft. A plurality of driven pulleys are fixed on the outer wall of the transmission driven shaft along the axial direction of the transmission driven shaft. A transmission belt is fixed between the drive pulleys and the driven pulleys. A transmission motor is fixed on the transmission bracket. The output shaft of the transmission motor is drivenly connected to the transmission drive shaft. The driven pulleys are combined to form a split transmission channel.

[0012] In an optional example, the transmission bracket includes a first side bracket, a second side bracket, and a connecting bracket connecting the two. A first sliding frame is slidably mounted on the first side bracket, and a second sliding frame is slidably mounted on the second side bracket. The transmission drive shaft is connected to the first side bracket and the second side bracket via bearings, and the transmission driven shaft is connected to the first sliding frame and the second sliding frame via bearings. The transmission motor is fixedly connected to the first side bracket, and a connecting rod for connection is fixed between the first sliding frame and the second sliding frame.

[0013] In an optional example, a first adjusting screw is rotatably mounted on the first sliding frame, a first flange is provided on the end of the first side bracket facing away from the second side bracket, a first threaded hole is provided on the first flange, the first adjusting screw is rotatably inserted into the first threaded hole by means of a threaded connection, and a first locking nut is fitted on the outer wall of the first adjusting screw by means of a threaded connection.

[0014] In one alternative example, the horizontal height of the upper surface of the second side bracket is lower than the conveying height of the split transmission channel.

[0015] In an optional example, the support unit includes a negative pressure block, which is fixedly connected to the frame. The negative pressure support end is located at the upper end of the negative pressure block. Multiple sets of negative pressure channels are formed inside the negative pressure block, and each negative pressure channel has a number of negative pressure holes, which are formed on the negative pressure support end.

[0016] The beneficial effects of this invention are that by cooperating with the separate transport channel, the separating unit and the printing unit, small-sized cardboard can be moved and printed, realizing the synchronous printing of two sets of small-sized cardboard, reducing the printing time of small-sized cardboard, and the two sets of separate transport channels can be combined to form an integrated transport channel, which can move large-sized cardboard and print large-sized cardboard through cooperation with the printing unit, realizing the rapid printing of cardboard of various specifications, and improving the application range of cardboard printing equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this 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 for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of an embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the separating unit located in the first working position in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram showing the partition unit located in the second working position in an embodiment of the present invention;

[0022] Figure 5 This is a front view of the dividing unit in an embodiment of the present invention;

[0023] Figure 6This is a three-dimensional structural diagram of the partition unit in an embodiment of the present invention;

[0024] Figure 7 This is an exploded view of the partition unit in an embodiment of the present invention;

[0025] Figure 8 This is an exploded structural diagram of the elastic connector in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the mounting structure of the elastic drive plate in an embodiment of the present invention;

[0027] Figure 10 This is a three-dimensional structural diagram of the transmission component in an embodiment of the present invention;

[0028] Figure 11 This is an exploded view of the transmission component in an embodiment of the present invention;

[0029] Figure 12 This is a three-dimensional structural diagram of the support unit in an embodiment of the present invention;

[0030] Figure 13 This is a three-dimensional structural diagram of the printing unit in an embodiment of the present invention.

[0031] The diagram is labeled as follows: 1. Frame; 101. Workbench; 2. Support unit; 201. Negative pressure support end; 21. Negative pressure block; 211. Negative pressure flow channel; 3. Separation unit; 301. Separation end; 31. Separation base; 32. Separation telescopic cylinder; 33. Separation bracket; 34. Guide ring; 35. Sliding column; 36. Separation drive shaft; 37. Separation driven shaft; 38. Drive bracket; 39. Driven bracket; 310. Push bracket; 311. Push plate; 312. Power motor; 313. Driven gear; 314. Driven ring; 315. Power gear; 316. Power shaft; 317. Connecting seat; 3171. Connecting slot; 318. Elastic drive plate; 3181. Extension; 319. Fixing ring; 4. Transmission assembly; 401. Split transmission channel ; 402. Integrated transmission channel; 403. Side limiting end; 41. Transmission bracket; 411. First side bracket; 4111. First flange; 4112. First threaded hole; 412. Second side bracket; 413. First sliding frame; 414. Second sliding frame; 415. Connecting rod; 416. First adjusting screw; 417. First locking nut; 418. Connecting bracket; 42. Transmission drive shaft; 43. Transmission driven shaft; 44. Drive pulley; 45. Driven pulley; 46. Transmission belt; 47. Transmission motor; 5. Printing unit; 501. Printing end; 51. Sliding platform; 52. Printing support frame; 53. Printing guide rail; 54. Sliding block; 55. Printing lead screw; 56. Drive nut; 57. Printing motor; 58. Printing bracket. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0033] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] In one embodiment, please refer to Figures 1 to 4 As shown, the present invention provides a paperboard printing device, comprising: a frame 1, a support unit 2, a separation unit 3, a transmission unit and a printing unit 5.

[0035] The frame 1 has a worktable 101, which serves as the carrier of the equipment.

[0036] The support unit 2 is fixed to the upper end of the workbench 101 and has a negative pressure support end 201 for supporting the paperboard. The negative pressure support end 201 is connected to an external negative pressure device, which provides negative pressure so that the paperboard can be adsorbed and fixed on the negative pressure support end 201, thus providing conditions for stable printing of the paperboard.

[0037] The dividing unit 3 is fixedly connected to the worktable 101 and has a dividing end 301 that can move vertically. The dividing end 301 has a first working position and a second working position.

[0038] The transmission unit has two sets of transmission components 4 fixedly connected to the frame 1. The transmission components 4 are fixed to the upper end of the worktable 101 and are symmetrically arranged with the partition unit 3 as the center line. Each transmission component 4 has a separate transmission channel 401 for driving the paperboard to move. The two sets of separate transmission channels 401 are combined to form an integrated transmission channel 402. The horizontal height of the negative pressure support end 201 is lower than or equal to the horizontal height of the separate transmission channel 401. Paperboards with smaller dimensions are moved through the separate transmission channel 401, while paperboards with larger dimensions are moved through the integrated transmission channel 402, thus realizing the movement and fixation of paperboards of different dimensions.

[0039] The printing unit 5 is fixed to the upper end of the worktable 101 and has a printing end 501 that can move in a direction perpendicular to the integrated transmission channel 402. The moving path of the printing end 501 is the printing area.

[0040] When the separating end 301 is in the first working position, the separating end 301 is located inside the integrated transmission channel 402, and the two sets of cardboard move through the symmetrical separate transmission channel 401. The printing end 501 prints independently on the cardboard in the separate transmission channel 401. When the separating end 301 is in the second working position, the separating end 301 is located below the integrated transmission channel 402, and the cardboard moves through the integrated transmission channel 402. The printing end 501 prints on the cardboard in the integrated transmission channel 402.

[0041] Because the printing area required on the cardboard surface is relatively large, the printing end 501 needs to move back and forth multiple times. Each time, the cardboard can only move forward a certain distance before waiting for the next printing, until the pattern is completely printed.

[0042] The printing process for small-sized cardboard is as follows: The separator 301 is in the first working position. Two sets of cardboard are placed into independent separate transport channels 401. Two sets of transport components 4 work to move the two sets of cardboard to the printing area. The printing unit 5 works, and the printing end 501 moves into one set of transport components 4 to print the cardboard thereon once. After the first printing is completed, the printing end 501 moves into another set of transport components 4 to print the cardboard thereon once. Simultaneously, the transport component 4 that has completed printing works, moving the cardboard a set distance and waiting for the second printing. The printing end 501 moves back to the initial position, repeating the above steps, and simultaneously, the other set of transport components 4 works, moving the cardboard thereon a set distance and waiting for the second printing, and so on until printing is complete.

[0043] Printing process for large-size cardboard: When the separator end 301 is in the second working position, the conveying unit works, and the cardboard moves to the printing area through the integrated conveying channel 402. The printing end 501 moves to print the cardboard once. After the first printing is completed, the conveying unit works to move the cardboard a set distance and waits for the second printing. This process continues until printing is complete.

[0044] In summary, this example utilizes the combined action of the separate transport channel 401, the separating unit 3, and the printing unit 5 to move and print small-sized cardboard, achieving simultaneous printing of two sets of small-sized cardboard and reducing printing time. Furthermore, the two separate transport channels 401 can be combined to form an integrated transport channel 402, which can move large-sized cardboard and print it in conjunction with the printing unit 5, enabling rapid printing of cardboard of various specifications and expanding the application range of the cardboard printing equipment.

[0045] In an optional example, please refer to Figures 1 to 9 As shown, to facilitate the assembly of the partition unit 3, the partition unit 3 includes a partition base 31 fixedly connected to the frame 1 by bolts. A partition telescopic cylinder 32 is fixedly connected to the lower end of the partition base 31 by bolts. The partition end 301 includes a partition bracket 33, which is vertically connected to the partition base 31 by sliding. The telescopic end of the partition telescopic cylinder 32 is fixedly connected to the partition bracket 33. A guide ring 34 is installed on the partition base 31 by bolts. A sliding column 35 is fixed to the lower end of the partition bracket 33. The sliding column 35 is slidably inserted into the guide ring 34 and can move vertically. The partition telescopic cylinder 32 can be driven by hydraulic, pneumatic, or electric means.

[0046] Specifically, in this example, the partition base 31 serves as the supporting structure for the partition unit 3, which facilitates the assembly and disassembly of the partition unit 3. At the same time, the operation of the partition telescopic cylinder 32 causes the telescopic end of the partition telescopic cylinder 32 to move the partition bracket 33, thereby realizing the switching of the partition bracket 33 between the first working position and the second working position.

[0047] In an optional example, please refer to Figures 1 to 9As shown, to ensure the printing quality of the cardboard, a partition drive shaft 36 and a partition driven shaft 37 are fixed to the partition bracket 33 by rotation. An drive bracket 38 is fixed to the outer wall of the partition drive shaft 36 by a key connection, and a driven bracket 39 is fixed to the outer wall of the partition driven shaft 37 by a key connection. Two sets of symmetrically arranged push brackets 310 are installed between the drive bracket 38 and the driven bracket 39 by a rotating shaft connection. The drive bracket 38, driven bracket 39, and push brackets 310 combine to form a parallelogram mechanism. A push plate 311, which can move towards or away from the split transmission channel 401, is fixed on the push bracket 310. A power assembly is installed on the partition base 31, which is driven and connected to the partition drive shaft 36 for rotating the partition drive shaft 36. The partition bracket 33 has two through-holes along its vertical direction. The partition drive shaft 36 and the partition driven shaft 37 are respectively rotatably inserted into one of the through-holes and extend downwards.

[0048] Specifically, in this example, the operation of the power component drives the separation drive shaft 36 to rotate, the separation drive shaft 36 drives the drive bracket 38 to rotate, the drive bracket 38 drives the push bracket 310 to move, and the push bracket 310 pushes the cardboard away from the separation unit 3 until the cardboard can contact the edge of the split transmission channel 401, so that the cardboard can be accurately positioned, ensuring the printing accuracy of the cardboard and avoiding the cardboard from deviating during multiple printing processes, thus reducing the printing quality of the cardboard.

[0049] In an optional example, please refer to Figures 1 to 9 As shown, to facilitate the assembly and disassembly of the power assembly, the power assembly includes a power motor 312, a driven gear 313, a driven ring 314, a power gear 315, and a power shaft 316. The power motor 312 is fixedly connected to the partition base 31 by bolts. The power gear 315 is fixed to the output shaft of the power motor 312 by a key. The driven ring 314 is connected to the lower end of the partition base 31 by a bearing. The rotation centerline of the driven ring 314 is vertically oriented. The driven ring 314 is fixedly connected to the upper end of the driven gear 313 by bolts. The driven gear 313 meshes with the power gear 315. The driven gear 313 has a splined slot that passes through it. The power shaft 316 is slidably inserted into the splined slot and is driven by the splined slot by a key. The top of the power shaft 316 is fixedly connected to the partition drive shaft 36 by bolts and is used to drive the partition drive shaft 36 to rotate.

[0050] Specifically, in this example, the output shaft of the power motor 312 drives the driven gear 313 to rotate, the driven gear 313 drives the power shaft 316 to rotate, and the power shaft 316 drives the partition drive shaft 36 to rotate, thus providing power for pushing the cardboard. It has the advantages of simple structure and convenient assembly and disassembly.

[0051] In an optional example, please refer to Figures 1 to 9 As shown, in order to ensure the flatness of the cardboard, an elastic connector is fixed to the top of the drive shaft 316. The elastic connector is connected to the lower end of the separation drive shaft 36 by bolts. The elastic connector includes a connecting seat 317, an elastic drive plate 318, and a fixing ring 319. The connecting seat 317 is fixedly connected to the lower end of the separation drive shaft 36 by bolts. The elastic drive plate 318 is fixedly connected to the top of the drive shaft 316. The elastic drive plate 318 has several extensions 3181 extending in all four directions. The connecting seat 317 has several connecting slots 3171 that match the extensions 3181 at one end facing the elastic drive plate 318. The fixing ring 319 is fixedly connected to the connecting seat 317 by bolts and fixes the extensions 3181 in the connecting slots 3171.

[0052] Specifically, in this example, the elastic connector is used to connect the separating drive shaft 36 and the power shaft 316. When the push plate 311 contacts the cardboard, it can absorb a certain torque to avoid excessive pushing force, which would cause the edges of the cardboard to wrinkle and ensure the flatness of the cardboard.

[0053] In an optional example, please refer to Figures 1 to 11 As shown, to ensure the printing quality of the cardboard, the transmission assembly 4 includes a transmission bracket 41 fixedly connected to the frame 1 by bolts. The end of the transmission bracket 41 facing away from the separator unit 3 is provided with a side limiting end 403. The push plate 311 can push the cardboard to move in the direction of the corresponding side limiting end 403. The transmission support 41 is fixed with a transmission drive shaft 42 and a transmission driven shaft 43 by bearings. Several drive pulleys 44 are fixed on the outer wall of the transmission drive shaft 42 along the axial direction of the transmission drive shaft 42 by keys. Several driven pulleys 45 are fixed on the outer wall of the transmission driven shaft 43 along the axial direction of the transmission driven shaft 43 by keys. A transmission belt 46 is fixed between the drive pulleys 44 and the driven pulleys 45. A transmission motor 47 is fixed on the transmission support 41. The output shaft of the transmission motor 47 is fixedly connected to the transmission drive shaft 42 by a coupling. The driven pulleys 45 are combined to form a split transmission channel 401. The side limiting end 403 abuts against the side edge of the cardboard and is used to position the cardboard.

[0054] Specifically, in this example, the output shaft of the transmission motor 47 drives the transmission drive shaft 42 to rotate, the transmission drive shaft 42 drives the drive pulley 44 to rotate, the drive pulley 44 drives the transmission belt 46 to move, and the transmission belt 46 drives the paperboard to move, thus realizing the independent transportation of the paperboard. Furthermore, the side limiting end 403 positions the paperboard in the split transmission channel 401, preventing the paperboard from shifting within the split transmission channel 401 and ensuring the printing quality of the paperboard.

[0055] In an optional example, please refer to Figures 1 to 11 As shown, to facilitate the assembly and disassembly of the transmission component 4, the transmission bracket 41 includes a first side bracket 411, a second side bracket 412, and a connecting bracket 418 connecting the two. A first sliding frame 413 is slidably mounted on the first side bracket 411, and a second sliding frame 414 is slidably mounted on the second side bracket 412. The transmission drive shaft 42 is connected to the first side bracket 411 and the second side bracket 412 via bearings. The transmission driven shaft 43 is connected to the first sliding frame 413 and the second sliding frame 414 via bearings. The transmission motor 47 is fixedly connected to the first side bracket 411 via bolts. A connecting rod 415 for connection is fixed between the first sliding frame 413 and the second sliding frame 414. The connecting bracket 418 is connected to the first side bracket 411 and the second side bracket 412 by bolts; the first side bracket 411 is provided with a sliding groove, and the first sliding frame 413 is slidably inserted into the first sliding groove; the second side bracket 412 is fixed with a side guide rail, and the second sliding frame 414 is fixed with a side slider, which is slidably fitted onto the outer wall of the side guide rail; the connecting rod 415 is fixedly connected to the first sliding frame 413 and the second sliding frame 414 by bolts.

[0056] Specifically, this example reduces the installation difficulty of the transmission bracket 41 by disassembling it into three parts, facilitates the disassembly and assembly of the transmission component 4, and improves the efficiency of disassembly and assembly of the transmission component 4.

[0057] In an optional example, please refer to Figures 1 to 11As shown, to further ensure the printing quality of the cardboard, a first adjusting screw 416 is rotatably mounted on the first sliding frame 413. A first flange 4111 is provided at the end of the first side bracket 411 facing away from the second side bracket 412. A first threaded hole 4112 is provided on the first flange 4111. The first adjusting screw 416 is rotatably inserted into the first threaded hole 4112 via a threaded connection. A first locking nut 417 is threadedly fitted onto the outer wall of the first adjusting screw 416. The first sliding frame 413 has a rotating hole, one end of the first adjusting screw 416 is rotatably inserted into the rotating hole, and the other end of the first adjusting screw 416 has an adjusting protrusion. The first locking nut 417 fixes the first adjusting screw 416 by abutting against the first flange 4111.

[0058] Specifically, in this example, the operator rotates the first adjusting screw 416, which, through the threaded engagement, drives the first sliding frame 413 to move. The first sliding frame 413 then drives the connecting rod 415 and the second sliding frame 414 to move. The second sliding frame 414 then drives the driven pulley 45 to move, thereby adjusting the tension of the conveyor belt 46. This allows the cardboard to move stably, preventing it from shifting within the split conveyor channel 401 and ensuring the printing quality of the cardboard.

[0059] In an optional example, please refer to Figures 1 to 11 As shown, in order to further improve the stability of cardboard conveying, the horizontal height of the upper surface of the second side support 412 is lower than the conveying height of the split conveying channel 401.

[0060] Specifically, during the printing process, large-size cardboard needs to move along the direction of the integrated transport channel 402. The horizontal height of the upper surface of the second side support 412 is lower than the transport height of the separate transport channel 401. When the two separate transport channels 401 are combined to form the integrated transport channel 402, interference with the movement of the large-size cardboard can be avoided, ensuring the stability of the cardboard transport.

[0061] In an optional example, please refer to Figures 1 to 12 As shown, the support unit 2 includes a negative pressure block 21, which is fixedly connected to the frame 1. A negative pressure support end 201 is located at the upper end of the negative pressure block 21. Multiple sets of negative pressure flow channels 211 penetrating the negative pressure block 21 are formed within it. Each negative pressure flow channel 211 has several negative pressure holes, which are located on the negative pressure support end 201. The negative pressure flow channels 211 are connected to an external negative pressure device, which provides negative pressure.

[0062] Specifically, this example uses multiple sets of negative pressure channels 211 to adsorb the cardboard, so that the cardboard can be adsorbed on the negative pressure support end 201 at any stopping position, ensuring the stability of the cardboard during printing and further ensuring the printing quality of the cardboard.

[0063] In an optional example, please refer to Figures 1 to 13 As shown, the printing unit 5 includes a sliding platform 51 and a printing support frame 52 fixed to the upper end of the worktable 101. The printing support frame 52 is equipped with a printing guide rail 53 along its length. A sliding block 54 is slidably fitted on the outer wall of the printing guide rail 53. The sliding block 54 is fixedly connected to the sliding platform 51 by bolts. A printing lead screw 55 is installed in the printing support frame 52 along its length by bearings. A drive nut 56 is fixed on the sliding platform 51. The drive nut 56 is fitted on the outer wall of the printing lead screw 55 by threads. A printing motor 57 is fixed on the printing support frame 52 by bolts. The output shaft of the printing motor 57 is fixedly connected to one end of the printing lead screw 55 by a coupling. A printing bracket 58 is fixed on the printing support frame 52 by bolts. The printing end 501 includes several printing nozzles. The printing nozzles are fixedly installed on the printing bracket 58 along its width by bolts. The printing guide rail 53 is fixedly connected to the printing support frame 52 by bolts; the printing nozzle is connected to an external liquid supply device, which is used to supply ink.

[0064] Specifically, in this example, the output shaft of the printing motor 57 drives the printing lead screw 55 to rotate, the printing lead screw 55 drives the drive nut 56 to move, the drive nut 56 drives the sliding platform 51 to move, and the sliding platform 51 drives the printing nozzle to move, thereby realizing the printing and spraying of paperboard and ensuring the printing quality of paperboard.

[0065] In summary, this invention, through the cooperation of the split transmission channel 401, the separating unit 3, and the printing unit 5, enables the printing of paperboards of different specifications, thereby expanding the application range of the paperboard printing equipment. Simultaneously, the addition of a pusher bracket 310 that can move the paperboard ensures precise positioning, guarantees printing accuracy, prevents the paperboard from deviating during multiple printing processes, and avoids reducing printing quality. Furthermore, the addition of an elastic connector absorbs a certain amount of torque, preventing excessive pushing force that could cause edge wrinkling on the paperboard and ensuring its flatness.

[0066] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0067] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A paperboard printing device, characterized in that, include: Rack (1); The support unit (2) is fixedly connected to the frame (1) and has a negative pressure support end (201) for supporting the cardboard; The partition unit (3) is fixedly connected to the frame (1) and has a partition end (301) that can move vertically. The partition end (301) has a first working position and a second working position. The transmission unit has two sets of transmission components (4) fixedly connected to the frame (1). The transmission components (4) are symmetrically arranged with the partition unit (3) as the center line. The transmission components (4) have a split transmission channel (401) for driving the cardboard to move. The two sets of split transmission channels (401) are combined to form an integrated transmission channel (402). The printing unit (5) is fixedly connected to the frame (1) and has a printing end (501) that can move in a direction perpendicular to the integrated transmission channel (402); When the separating end (301) is located in the first working position, the separating end (301) is located in the integrated transmission channel (402), the two sets of cardboard move through the separate transmission channel (401), and the printing end (501) prints independently on the cardboard in the separate transmission channel (401); When the dividing end (301) is in the second working position, the dividing end (301) is located under the integrated transmission channel (402), the cardboard moves through the integrated transmission channel (402), and the printing end (501) prints on the cardboard in the integrated transmission channel (402); The partition unit (3) includes a partition base (31) fixedly connected to the frame (1), a partition telescopic cylinder (32) fixedly attached to the lower end of the partition base (31), and a partition end (301) including a partition bracket (33). The partition bracket (33) is connected to the partition base (31) vertically by sliding, and the telescopic end of the partition telescopic cylinder (32) is fixedly connected to the partition bracket (33). The partition bracket (33) is fixed with a partition drive shaft (36) and a partition driven shaft (37) by rotation. The partition drive shaft (36) is fixed with an drive bracket (38) on its outer wall and the partition driven shaft (37) is fixed with a driven bracket (39) on its outer wall. The drive bracket (38) and the driven bracket (39) are connected by rotation and two sets of symmetrically arranged push brackets (310) are installed. The drive bracket (38), the driven bracket (39) and the push bracket (310) are combined to form a parallelogram mechanism. The push bracket (310) is fixed with a push plate (311) that can move toward or away from the split transmission channel (401). The partition base (31) is equipped with a power component. The power component is driven and connected to the partition drive shaft (36) and is used to rotate the partition drive shaft (36).

2. The paperboard printing equipment according to claim 1, characterized in that, The power assembly includes a power motor (312), a driven gear (313), a driven ring (314), a power gear (315), and a power shaft (316). The power motor (312) is fixedly connected to the partition base (31). The power gear (315) is fixed to the output shaft of the power motor (312). The driven ring (314) is connected to the partition base (31) by rotation. The rotation centerline of the driven ring (314) is vertically arranged. 314) is fixedly connected to the driven gear (313), the driven gear (313) meshes with the power gear (315), the driven gear (313) has a spline through slot through the driven gear (313), the power shaft (316) is slidably inserted into the spline through slot and drivenly connected to the spline through slot by key connection, the top of the power shaft (316) is fixedly connected to the partition drive shaft (36) and is used to drive the partition drive shaft (36) to rotate.

3. The paperboard printing equipment according to claim 2, characterized in that, An elastic connector is fixed to the top of the power shaft (316). The elastic connector is connected to the lower end of the separation drive shaft (36). The elastic connector includes a connecting seat (317), an elastic drive plate (318), and a fixing ring (319). The connecting seat (317) is fixedly connected to the lower end of the separation drive shaft (36). The elastic drive plate (318) is fixedly connected to the top of the power shaft (316). The elastic drive plate (318) has several extensions (3181) extending in all four directions. The connecting seat (317) has several openings at one end facing the elastic drive plate (318) that match the extensions (3181). The fixing ring (319) is fixedly connected to the connecting seat (317) and fixes the extensions (3181) in the connecting slot (3171).

4. The paperboard printing equipment according to claim 3, characterized in that, The transmission assembly (4) includes a transmission bracket (41) fixedly connected to the frame (1). A side limiting end (403) is provided at the end of the transmission bracket (41) facing away from the separating unit (3). The push plate (311) can push the cardboard to move towards the corresponding side limiting end (403). A transmission drive shaft (42) and a transmission driven shaft (43) are fixedly connected to the transmission bracket (41) by rotation. Along the outer wall of the transmission drive shaft (42)... A plurality of driving pulleys (44) are fixed axially. A plurality of driven pulleys (45) are fixed on the outer wall of the driven shaft (43) along the axial direction of the driven shaft (43). A transmission belt (46) is fixed between the driving pulleys (44) and the driven pulleys (45). A transmission motor (47) is fixed on the transmission bracket (41). The output shaft of the transmission motor (47) is driven and connected to the transmission driving shaft (42). The driven pulleys (45) are combined to form a split transmission channel (401).

5. The paperboard printing equipment according to claim 4, characterized in that, The transmission bracket (41) includes a first side bracket (411), a second side bracket (412), and a connecting bracket (418) connecting the two. A first sliding frame (413) is slidably mounted on the first side bracket (411), and a second sliding frame (414) is slidably mounted on the second side bracket (412). The transmission drive shaft (42) is connected to the first side bracket (411) and the second side bracket (412) by means of bearing connection. The transmission driven shaft (43) is connected to the first sliding frame (413) and the second sliding frame (414) by means of bearing connection. The transmission motor (47) is fixedly connected to the first side bracket (411). A connecting rod (415) for connection is fixed between the first sliding frame (413) and the second sliding frame (414).

6. The paperboard printing equipment according to claim 5, characterized in that, The first sliding frame (413) is rotatably mounted with a first adjusting screw (416). The first side bracket (411) is provided with a first flange (4111) at the end away from the second side bracket (412). The first flange (4111) is provided with a first threaded hole (4112). The first adjusting screw (416) is rotatably inserted into the first threaded hole (4112) by means of threaded connection. The outer wall of the first adjusting screw (416) is fitted with a first locking nut (417) by means of threaded connection.

7. The paperboard printing equipment according to claim 6, characterized in that, The horizontal height of the upper surface of the second side bracket (412) is lower than the conveying height of the split transmission channel (401).

8. The paperboard printing equipment according to claim 1, characterized in that, The support unit (2) includes a negative pressure block (21), which is fixedly connected to the frame (1). The negative pressure support end (201) is located at the upper end of the negative pressure block (21). Multiple sets of negative pressure channels (211) are opened inside the negative pressure block (21). The negative pressure channels (211) have several negative pressure holes, which are opened on the negative pressure support end (201).

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