Paperboard printing machine capable of improving printing definition

Abstract

The utility model discloses a paperboard printing machine capable of improving printing definition, a pressing plate mechanism comprises a fixed pressing plate assembly, an adjusting pressing plate assembly and at least one movable pressing plate assembly, and the fixed pressing plate assembly is fixedly installed on one side of a conveying printing table. The movable pressing plate assembly and the adjusting pressing plate assembly are slidably installed on the upper portion of the conveying printing table in the transverse direction, the movable pressing plate assembly is in transmission connection with the ink vehicle, at least one longitudinal pressing roller is rotationally installed on the movable pressing plate assembly in the longitudinal direction, and the fixed pressing plate assembly and the adjusting pressing plate assembly are each provided with a plurality of rolling balls. The paperboard is flattened and fixed in the longitudinal direction through the fixed pressing plate assembly and the adjusting pressing plate assembly, the movable pressing plate assembly is driven by the ink vehicle to move in the transverse direction to flatten the paperboard in the transverse direction, the paperboard can be flattened and fixed in the ink jet process, the flatness of the paperboard during printing is improved, and the printing efficiency is improved. The phenomena of ghosting, cross grains and the like caused by paper board tilting are avoided, and the printing definition is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cardboard printing machines, in particular to a cardboard printing machine with improved printing clarity. Background Art

[0002] A cardboard printing press is a printing device that sprays patterns or text on cardboard. The cardboard printing press mainly includes a conveyor belt and an ink carriage. The conveyor belt carries the cardboard and transports the cardboard along the longitudinal direction toward the ink carriage. The ink carriage moves back and forth in the transverse direction to spray the cardboard. In order to fix the cardboard, existing cardboard printing machines often install a vacuum adsorption mechanism on the conveyor belt, thereby adsorbing the cardboard on the conveyor belt through negative pressure. However, during production and storage, the cardboard will inevitably bend and warp. When the bent cardboard is placed on the conveyor belt, it is difficult to be completely adsorbed on the conveyor belt, which leads to poor flatness of the cardboard. The pattern after the ink carriage spraying will have ghosting and horizontal stripes, resulting in reduced printing clarity and poor printing effect. In addition, the cardboard with large bends is prone to interference with the ink carriage, and even failure to complete printing. In order to solve this problem, in the existing technology, a pressing roller or pressure bar is often set at the front end of the ink carriage to flatten the cardboard before it enters the ink carriage. However, when the cardboard enters under the ink carriage and moves to the rear side of the ink carriage, the cardboard is in a free state and will still bend and warp. During the inkjet printing process of the ink carriage, the cardboard cannot be fixed under the printing area of ​​the ink carriage, and will still bend and warp to a certain extent. The reliability and stability are poor, so it is necessary to improve it. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the utility model is to provide a cardboard printing machine with improved printing clarity, prevent cardboard from bending and warping, improve printing clarity, and improve reliability and stability.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a cardboard printing machine for improving printing clarity, comprising a conveying printing table and a printing device, the printing device is arranged on the upper part of the conveying printing table, the upper part of the conveying printing table is provided with a conveyor belt conveying in the longitudinal direction, the printing device is slidably installed with an ink cart in the transverse direction, and also comprises a pressing plate mechanism, the pressing plate mechanism comprises a fixed pressing plate assembly, an adjusting pressing plate assembly and at least one movable pressing plate assembly, the fixed pressing plate assembly is fixedly installed on one side of the conveying printing table, the movable pressing plate assembly and the adjusting pressing plate assembly are slidably installed in the transverse direction on the upper part of the conveying printing table, the movable pressing plate assembly The movable pressure plate assembly is connected to the ink carriage for transmission, and is provided with at least one longitudinal pressure roller rotatably installed in the longitudinal direction. The front end of the longitudinal pressure roller extends to the front end of the conveyor belt, and the rear end of the longitudinal pressure roller passes through the printing device and extends to the rear end of the conveyor belt. The front ends of the fixed pressure plate assembly and the adjusting pressure plate assembly extend to the front end of the conveyor belt respectively, and the rear ends of the fixed pressure plate assembly and the adjusting pressure plate assembly extend to the rear end of the conveyor belt respectively. The fixed pressure plate assembly and the adjusting pressure plate assembly are both provided with multiple rolling balls, and the lower part of each rolling ball protrudes downward from the lower end surface of the fixed pressure plate assembly and the adjusting pressure plate assembly, and each rolling ball is arranged at intervals along the longitudinal direction.

[0005] In a further technical solution, a transverse pressure plate assembly is provided in front of the conveying printing table, and a transverse pressure roller is installed on the transverse pressure plate assembly for rotation along the transverse direction. The transverse pressure roller is arranged perpendicular to the longitudinal pressure roller, and the distance between the transverse pressure roller and the conveyor belt is greater than or equal to the distance between the longitudinal pressure roller and each rolling ball and the conveyor belt.

[0006] In a further technical solution, a front crossbeam is provided at the front end of the transport printing table, and a rear crossbeam is provided at the rear end of the transport printing table. Both the front crossbeam and the rear crossbeam are arranged above the transport printing table in the horizontal direction. The front and rear ends of the fixed pressure plate assembly are fixedly installed on the front crossbeam and the rear crossbeam respectively, and the front and rear ends of the adjustable pressure plate assembly and the movable pressure plate assembly are slidably installed on the front crossbeam and the rear crossbeam respectively, and the transverse pressure plate assembly is arranged on the front crossbeam.

[0007] In a further technical solution, the transverse pressure plate assembly includes two transverse connecting members and a transverse pressure roller. The two transverse connecting members are respectively arranged at the left and right ends of the front crossbeam. The transverse connecting members include an adjusting screw, an adjusting handwheel and a connecting seat. The connecting seat is rotationally connected to the end of the transverse pressure roller. The adjusting handwheel is rotationally installed on the front crossbeam. The lower end of the adjusting screw is rotationally connected to the upper part of the connecting seat, and the adjusting handwheel is threadedly connected to the adjusting screw.

[0008] In a further technical solution, the transverse pressure roller is made of rubber or silicone, and a plurality of height markings are provided on the outer side surface of the adjusting screw at equal intervals in the vertical direction.

[0009] In a further technical solution, a movable pressure plate assembly is respectively provided on the left and right sides of the ink cart, and each movable pressure plate assembly includes a movable pressure plate slide, a longitudinal pressure roller and at least two pressure roller connectors. The front and rear ends of the movable pressure plate slide are respectively slidably installed on the front crossbeam and the rear crossbeam, and the movable pressure plate slide is fixedly connected to the ink cart on the side facing the ink cart. The two pressure roller connectors are respectively slidably installed on the front and rear ends of the movable pressure plate slide, and the two pressure roller connectors are respectively rotatably connected to the front and rear ends of the longitudinal pressure roller, and each pressure roller connector is sleeved with a pressure roller return spring.

[0010] In a further technical solution, the fixed pressure plate assembly includes a mounting plate, a floating plate, two fixed connecting parts and two floating springs, the front and rear ends of the mounting plate are respectively fixedly installed on the same end of the front crossbeam and the rear crossbeam, the upper parts of the two fixed connecting parts are respectively slid up and down and installed on the front and rear ends of the mounting plate, the lower parts of the two fixed connecting parts are respectively fixedly installed on the front and rear ends of the floating plate, the two floating springs are respectively sleeved on the two fixed connecting parts, the upper ends of the two floating springs respectively press against the mounting plate, the lower ends of the two floating springs respectively press against the floating plate, a plurality of rolling balls are arranged at intervals along the longitudinal direction on the lower part of the floating plate, and each rolling ball protrudes from the bottom surface of the floating plate. The structure of the adjusting pressure plate assembly is the same as that of the fixed pressure plate assembly, and the front and rear ends of the mounting plate of the adjusting pressure plate assembly are respectively slidably installed on the front and rear crossbeam.

[0011] In a further technical solution, the front crossbeam and the rear crossbeam are respectively provided with an adjustment locking member, and the two adjustment locking members are respectively fixedly connected to the front and rear ends of the mounting plate of the adjustment pressure plate assembly, and the two adjustment locking members are respectively locked and cooperated with the front crossbeam and the rear crossbeam.

[0012] In a further technical solution, the adjusting locking piece includes an adjusting slider and an adjusting screw, the adjusting screw is threadedly connected to the upper part of the adjusting slider, a fixed slot is provided on the side of the adjusting slider facing the adjusting pressure plate assembly, the mounting plate of the adjusting pressure plate assembly is inserted into the fixed slot, the adjusting slider of the first adjusting locking piece is slidably installed on the front cross beam, the lower end portion of the adjusting nut of the first adjusting locking piece is abutted against the front cross beam, the adjusting slider of the second adjusting locking piece is slidably installed on the rear cross beam, and the lower end portion of the adjusting nut of the second adjusting locking piece is abutted against the rear cross beam.

[0013] In a further technical solution, the conveying printing table is also provided with at least one fan, a plurality of vacuum adsorption holes are opened on the conveyor belt, at least one vacuum chamber is provided inside the conveyor belt, the vacuum chamber is connected with each vacuum adsorption hole, the air inlet of the fan is connected with the vacuum chamber, and a blow hood is provided on the left and right sides of the ink cart respectively, and a blow port is opened at the lower part of the blow hood along the longitudinal direction, and the blow port passes through the ink cart along the longitudinal direction, and the upper part of the blow hood is connected to the air outlet of the fan through an air duct.

[0014] After adopting the above structure, the advantages of the present invention over the prior art are as follows: the left and right sides of the cardboard are flattened and fixed in the longitudinal direction respectively by the fixed pressure plate assembly and the adjustable pressure plate assembly, and then the movable pressure plate assembly is driven to move left and right in the transverse direction by the ink carriage, so that the cardboard is flattened in the transverse direction by the longitudinal pressure roller, thereby ensuring that the cardboard can be flattened in both the longitudinal and transverse directions; the longitudinal pressure roller and each rolling ball penetrate the ink carriage in the longitudinal direction, so that the cardboard can be flattened and fixed before, during and after inkjet printing, thereby improving the flatness of the cardboard during printing, avoiding ghosting and horizontal stripes caused by warping of the cardboard, and improving the print clarity; the movable pressure plate assembly is driven to move together by the transverse movement of the ink carriage during inkjet printing, which has a simple structure and low cost, can complete flattening synchronously during inkjet printing, and improves printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This utility model Figure 1 A magnified view of part A;

[0018] Figure 3 This utility model Figure 1 A magnified view of part B;

[0019] Figure 4 It is a cross-sectional view of the utility model;

[0020] Figure 5 This utility model Figure 4 Magnified view of part C;

[0021] Figure 6 It is a structural schematic diagram of the movable pressing plate assembly of the utility model;

[0022] Figure 7 It is a structural schematic diagram of the adjusting pressure plate assembly and the adjusting locking member of the utility model.

[0023] In the picture:

[0024] 1 conveying printing table, 11 conveyor belt, 111 vacuum adsorption hole, 12 front crossbeam, 13 rear crossbeam;

[0025] 2 printing units, 21 inking carriages;

[0026] 31 fixed pressure plate assembly, 32 adjusting pressure plate assembly, 33 mounting plate, 34 floating plate, 35 fixed connector, 36 floating spring, 37 rolling ball;

[0027] 4 adjusting locking piece, 41 adjusting slider, 42 adjusting screw, 43 fixing slot;

[0028] 5 movable pressure plate assembly, 51 longitudinal pressure roller, 52 movable pressure plate slide, 53 pressure roller connector, 54 pressure roller return spring;

[0029] 6 lateral pressure plate assembly, 61 lateral pressure roller, 62 adjusting screw rod, 63 adjusting hand wheel, 64 connecting seat; 7 blowing hood, 71 blowing port, 72 air duct. DETAILED DESCRIPTION

[0030] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0031] A cardboard printing press for improving printing clarity, such as Figures 1 to 7 As shown, it includes a transport printing table 1 and a printing device 2, the printing device 2 is arranged on the upper part of the transport printing table 1, and a conveyor belt 11 is provided on the upper part of the transport printing table 1 for transporting in the longitudinal direction. The printing device 2 is slidably installed with an ink cart 21 in the transverse direction, and also includes a pressure plate mechanism, the pressure plate mechanism includes a fixed pressure plate assembly 31, an adjustable pressure plate assembly 32 and at least one movable pressure plate assembly 5, the fixed pressure plate assembly 31 is fixedly installed on one side of the transport printing table 1, the movable pressure plate assembly 5 and the adjustable pressure plate assembly 32 are slidably installed on the upper part of the transport printing table 1 in the transverse direction, the movable pressure plate assembly 5 is transmission-connected with the ink cart 21, and the movable pressure plate assembly 5 is rotatably installed in the longitudinal direction. At least one longitudinal pressure roller 51, the front end of the longitudinal pressure roller 51 extends to the front end of the conveyor belt 11, the rear end of the longitudinal pressure roller 51 passes through the printing device 2 and extends to the rear end of the conveyor belt 11, the front ends of the fixed pressure plate assembly 31 and the adjusting pressure plate assembly 32 extend to the front end of the conveyor belt 11 respectively, the rear ends of the fixed pressure plate assembly 31 and the adjusting pressure plate assembly 32 extend to the rear end of the conveyor belt 11 respectively, the fixed pressure plate assembly 31 and the adjusting pressure plate assembly 32 are both provided with a plurality of rolling balls 37, the lower part of each rolling ball 37 protrudes downward from the lower end surface of the fixed pressure plate assembly 31 and the adjusting pressure plate assembly 32, and each rolling ball 37 is arranged at intervals along the longitudinal direction.

[0032] The traditional cardboard printing machine only has a pressing plate mechanism on the front side of the ink carriage 21. The cardboard can only be flattened before inkjet printing, but cannot be flattened and fixed during and after inkjet printing. This causes the cardboard to still have seesaw and bend phenomena during inkjet printing, and is prone to ghosting and warping phenomena during inkjet printing, resulting in poor printing clarity. The utility model uses a fixed pressing plate assembly 31 and an adjustable pressing plate assembly 32 to flatten and fix the left and right sides of the cardboard in the longitudinal direction respectively, and then drives the movable pressing plate assembly 5 to move left and right in the transverse direction through the ink carriage 21, thereby passing the longitudinal pressing roller. 51 flattens the cardboard in the transverse direction to ensure that the cardboard can be flattened in both the longitudinal and transverse directions; the longitudinal pressing roller 51 and each rolling ball 37 penetrate the ink carriage 21 in the longitudinal direction, so that the cardboard can be flattened and fixed before, during and after inkjet printing, thereby improving the flatness of the cardboard during printing, avoiding ghosting and horizontal stripes caused by warping of the cardboard, and improving the printing clarity; the lateral movement of the ink carriage 21 during inkjet printing drives the movable pressure plate assembly 5 to move together, which has a simple structure and low cost, can complete flattening synchronously during inkjet printing, and improves printing efficiency.

[0033] Specifically, a transverse pressure plate assembly 6 is provided in front of the conveyor printing station 1. A transverse pressure roller 61 is mounted on the transverse pressure plate assembly 6 for rotation in the transverse direction. The transverse pressure roller 61 is arranged perpendicular to the longitudinal pressure roller 51. The distance between the transverse pressure roller 61 and the conveyor belt 11 is greater than or equal to the distance between the longitudinal pressure roller 51 and each rolling ball 37 and the conveyor belt 11. The transverse pressure plate assembly 6 pre-flattens the cardboard, thereby achieving gradual flattening for cardboard with a large degree of curvature or large warping. This prevents cardboard from being unable to enter between the pressure plate mechanism and the conveyor belt 11 due to severe curvature or warping, thereby improving the applicability of the cardboard.

[0034] Specifically, a front crossbeam 12 is provided at the front end of the transport printing table 1, and a rear crossbeam 13 is provided at the rear end of the transport printing table 1. Both the front crossbeam 12 and the rear crossbeam 13 are arranged above the transport printing table 1 in the transverse direction. The front and rear ends of the fixed platen assembly 31 are fixedly mounted on the front crossbeam 12 and the rear crossbeam 13, respectively. The front and rear ends of the adjustable platen assembly 32 and the movable platen assembly 5 are slidably mounted on the front crossbeam 12 and the rear crossbeam 13, respectively. The transverse platen assembly 6 is arranged on the front crossbeam 12. The fixed platen assembly 31, the adjustable platen assembly 32, the movable platen assembly 5, and the transverse platen assembly 6 are fixed by the front crossbeam 12 and the rear crossbeam 13, respectively, without the need for a complex fixed support structure, resulting in a simple structure and low cost.

[0035] Specifically, the transverse pressure plate assembly 6 includes two transverse connectors and a transverse pressure roller 61. The two transverse connectors are respectively arranged at the left and right ends of the front crossbeam 12. The transverse connectors include an adjusting screw 62, an adjusting handwheel 63, and a connecting seat 64. The connecting seat 64 is rotatably connected to the end of the transverse pressure roller 61. The adjusting handwheel 63 is rotatably mounted on the front crossbeam 12. The lower end of the adjusting screw 62 is rotatably connected to the upper part of the connecting seat 64. The adjusting handwheel 63 is threadedly connected to the adjusting screw 62. By rotating the adjusting handwheel 63 to drive the adjusting screw 62 to move up and down, the transverse pressure roller 61 is driven to move up and down, and the distance between the transverse pressure roller 61 and the conveyor belt 11 is adjusted to adjust the pre-pressing thickness and improve flexibility.

[0036] Specifically, the transverse pressure roller 61 is made of rubber or silicone, and a plurality of height markings are provided at equal intervals along the vertical direction on the outer side surface of the adjusting screw 62. The transverse pressure roller 61 made of rubber or silicone can produce a certain elastic deformation, which not only avoids damaging the pressure plate but also facilitates adjustment of the transverse pressure roller 61. When adjusting the transverse pressure roller 61, the two adjusting hand wheels 63 are rotated simultaneously to make the two adjusting screws 62 rotate synchronously. The elastic deformation produced by the transverse pressure roller 61 prevents the two adjusting screws 62 from getting stuck even if they cannot rotate synchronously. The number of the adjusting hand wheels 63 or the front crossbeam 12 can be revealed by observing the height markings on the adjusting screws 62, so that the heights of the two adjusting screws 62 can be synchronized, making it easier to adjust the transverse pressure roller 61 to a horizontal level.

[0037] Specifically, an elastic pressing plate layer is coated on the outside of the transverse pressing roller 61. The elastic pressing plate layer is made of rubber or silicone material, and the elastic pressing plate layer gives the transverse pressing roller 61 a certain elasticity to avoid damaging the pressing plate.

[0038] Specifically, a movable platen assembly 5 is provided on each side of the ink carriage 21. Each movable platen assembly 5 includes a movable platen slide 52, a longitudinal pressure roller 51, and at least two pressure roller connectors 53. The front and rear ends of the movable platen slide 52 are slidably mounted on the front crossbeam 12 and the rear crossbeam 13, respectively. The movable platen slide 52 is fixedly connected to the ink carriage 21 on the side facing the ink carriage 21. The two pressure roller connectors 53 are slidably mounted on the front and rear ends of the movable platen slide 52, respectively. The two pressure roller connectors 53 are rotatably connected to the front and rear ends of the longitudinal pressure roller 51, respectively. Each pressure roller connector 53 is sleeved with a pressure roller return spring 54. The two movable platen assemblies 5 can flatten the cardboard in the horizontal direction before and after printing, improving the flattening efficiency and coverage area. The pressure roller return spring 54 gives the longitudinal pressure roller 51 vertical elasticity to prevent the longitudinal pressure roller 51 from damaging the platen.

[0039] The two floating springs 36 are respectively sleeved on the two fixed connecting members 35, and the upper ends of the two floating springs 36 respectively press against the mounting plate 33, and the lower ends of the two floating springs 36 respectively press against the floating plate 34. A plurality of rolling balls 37 are arranged at intervals along the longitudinal direction on the lower part of the floating plate 34, and each rolling ball 37 protrudes from the bottom surface of the floating plate 34. The structure of the adjusting pressure plate assembly 32 is the same as that of the fixed pressure plate assembly 31. The difference is that the front and rear ends of the mounting plate 33 of the adjusting pressure plate assembly 32 are respectively slidably mounted on the front and rear beams 12 and 13. The rolling balls 37 can rotate 360 ​​degrees, so that the cardboard can release the excess when the movable pressing plate assembly 5 flattens the cardboard to avoid wrinkles, and the floating springs 36 enable each rolling ball 37 to press the cardboard.

[0040] Specifically, the front crossbeam 12 and the rear crossbeam 13 are each provided with an adjustment locking member 4. The two adjustment locking members 4 are respectively fixedly connected to the front and rear ends of the mounting plate 33 of the adjustment plate assembly 32. The two adjustment locking members 4 are respectively locked and engaged with the front crossbeam 12 and the rear crossbeam 13. The adjustment locking members 4 lock the adjustment plate assembly 32 to prevent it from moving during printing. Before printing, the adjustment locking members 4 are unlocked, and the adjustment plate assembly 32 is moved according to the width of the cardboard, thereby adjusting the distance between the adjustment plate assembly 32 and the fixed plate assembly 31 to ensure that the adjustment plate assembly 32 and the fixed plate assembly 31 can press against both sides of the cardboard, thereby improving the adaptability to cardboards of different widths.

[0041] Specifically, the adjusting locking member 4 includes an adjusting slider 41 and an adjusting screw 42. The adjusting screw 42 is threadedly connected to the upper part of the adjusting slider 41. A fixed slot 43 is provided on the side of the adjusting slider 41 facing the adjusting pressure plate assembly 32. The mounting plate 33 of the adjusting pressure plate assembly 32 is inserted into the fixed slot 43. The adjusting slider 41 of the first adjusting locking member 4 is slidably installed on the front cross beam 12. The lower end of the adjusting nut of the first adjusting locking member 4 is abutted against the front cross beam 12. The adjusting slider 41 of the second adjusting locking member 4 is slidably installed on the rear cross beam 13. The lower end of the adjusting nut of the second adjusting locking member 4 is abutted against the rear cross beam 13. When the adjusting screw 42 is tightened, the adjusting screw 42 moves downward and presses tightly against the front cross beam 12 and the rear cross beam 13, thereby locking the adjusting pressure plate assembly 32. When the adjusting screw 42 is loosened, the adjusting screw 42 moves upward and away from the front cross beam 12 and the rear cross beam 13, thereby unlocking the adjusting pressure plate assembly 32. The structure is simple and the cost is low.

[0042] Specifically, the conveying printing table 1 is also provided with at least one fan, a plurality of vacuum adsorption holes 111 are provided on the conveyor belt 11, and at least one vacuum chamber is provided inside the conveyor belt 11. The vacuum chamber is connected to each vacuum adsorption hole 111, and the air inlet of the fan is connected to the vacuum chamber. A blowing hood 7 is provided on the left and right sides of the ink cart 21 respectively, and a blowing port 71 is provided at the lower part of the blowing hood 7 along the longitudinal direction. The blowing port 71 penetrates the ink cart 21 along the longitudinal direction, and the upper part of the blowing hood 7 is connected to the air outlet of the fan through the air duct 72. When the pressing plate mechanism flattens the cardboard from top to bottom, the fan generates negative pressure in the vacuum chamber, so that the cardboard is adsorbed and fixed on the conveyor belt 11 from below by the vacuum adsorption holes 111, so as to further improve the paper pressing effect and fix the cardboard to prevent the cardboard from shifting when the movable pressing plate assembly 5 flattens the cardboard; the air blown by the fan is blown toward the cardboard during printing through the blowing cover 7, which can not only clean the impurities and dust on the cardboard and further improve the printing clarity, but also accelerate the drying of the ink, avoid the blurring phenomenon when the movable pressing plate assembly 5 flattens the cardboard, and improve reliability and stability.

[0043] It should be understood that the terms "front", "back", "left", "right" and the like indicate directions or positional relationships based on the Figure 1 The orientation or position relationship shown is "longitudinal" along the front-to-back direction and "transverse" along the left-to-right direction. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection content of the present invention.

[0044] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A cardboard printing machine for improving printing clarity, comprising a transport printing table (1) and a printing device (2), wherein the printing device (2) is arranged on the upper part of the transport printing table (1), a conveyor belt (11) for conveying in the longitudinal direction is arranged on the upper part of the transport printing table (1), and an ink carriage (21) is slidably mounted on the printing device (2) in the transverse direction, characterized in that: The invention also includes a pressure plate mechanism, which includes a fixed pressure plate assembly (31), an adjustable pressure plate assembly (32) and at least one movable pressure plate assembly (5), wherein the fixed pressure plate assembly (31) is fixedly mounted on one side of the conveying printing table (1), the movable pressure plate assembly (5) and the adjustable pressure plate assembly (32) are slidably mounted on the upper part of the conveying printing table (1) in the transverse direction, the movable pressure plate assembly (5) is connected to the ink carriage (21) by transmission, and the movable pressure plate assembly (5) is rotatably mounted with at least one longitudinal pressure roller (51) in the longitudinal direction, the front end of the longitudinal pressure roller (51) extends to the front end of the conveying belt (11), and the longitudinal pressure roller (51) is arranged on the upper part of the conveying printing table (1). The rear end portion passes through the printing device (2) and extends to the rear end portion of the conveyor belt (11); the front end portions of the fixed pressure plate assembly (31) and the adjusting pressure plate assembly (32) respectively extend to the front end portion of the conveyor belt (11); the rear end portions of the fixed pressure plate assembly (31) and the adjusting pressure plate assembly (32) respectively extend to the rear end portion of the conveyor belt (11); the fixed pressure plate assembly (31) and the adjusting pressure plate assembly (32) are both provided with a plurality of rolling balls (37); the lower portion of each rolling ball (37) protrudes downward from the lower end surface of the fixed pressure plate assembly (31) and the adjusting pressure plate assembly (32); and each rolling ball (37) is spaced apart along the longitudinal direction.

2. A cardboard printing press for improving printing clarity according to claim 1, characterized in that: A transverse pressing plate assembly (6) is provided at the front of the conveying printing table (1), and a transverse pressing roller (61) is installed on the transverse pressing plate assembly (6) so as to rotate in the transverse direction. The transverse pressing roller (61) is arranged perpendicular to the longitudinal pressing roller (51), and the distance between the transverse pressing roller (61) and the conveyor belt (11) is greater than or equal to the distance between the longitudinal pressing roller (51) and each of the rolling balls (37) and the conveyor belt (11).

3. A cardboard printing press for improving printing clarity according to claim 2, characterized in that: The front end of the conveying printing table (1) is provided with a front crossbeam (12), and the rear end of the conveying printing table (1) is provided with a rear crossbeam (13). The front crossbeam (12) and the rear crossbeam (13) are both arranged above the conveying printing table (1) in the transverse direction. The front and rear ends of the fixed pressure plate assembly (31) are respectively fixedly installed on the front crossbeam (12) and the rear crossbeam (13). The front and rear ends of the adjusting pressure plate assembly (32) and the movable pressure plate assembly (5) are respectively slidably installed on the front crossbeam (12) and the rear crossbeam (13). The transverse pressure plate assembly (6) is arranged on the front crossbeam (12).

4. A cardboard printing press for improving printing clarity according to claim 3, characterized in that: The transverse pressure plate assembly (6) includes two transverse connecting members and the transverse pressure roller (61), the two transverse connecting members are respectively arranged at the left and right ends of the front crossbeam (12), the transverse connecting members include an adjusting screw rod (62), an adjusting hand wheel (63) and a connecting seat (64), the connecting seat (64) is rotatably connected to the end of the transverse pressure roller (61), the adjusting hand wheel (63) is rotatably installed on the front crossbeam (12), the lower end of the adjusting screw rod (62) is rotatably connected to the upper part of the connecting seat (64), and the adjusting hand wheel (63) is threadedly connected to the adjusting screw rod (62).

5. A cardboard printing press for improving printing clarity according to claim 4, characterized in that: The transverse pressing roller (61) is a transverse pressing roller (61) made of rubber or silicone, and the outer side surface of the adjusting screw rod (62) is provided with a plurality of height markings at equal intervals along the vertical direction.

6. A cardboard printing press for improving printing clarity according to claim 3, characterized in that: The ink cart (21) is provided with a movable pressure plate assembly (5) on the left and right sides respectively. Each movable pressure plate assembly (5) includes a movable pressure plate slide (52), the longitudinal pressure roller (51) and at least two pressure roller connectors (53). The front and rear ends of the movable pressure plate slide (52) are slidably mounted on the front crossbeam (12) and the rear crossbeam (13) respectively. The movable pressure plate slide (52) is fixedly connected to the ink cart (21) on the side facing the ink cart (21). The two pressure roller connectors (53) are slidably mounted on the front and rear ends of the movable pressure plate slide (52) respectively. The two pressure roller connectors (53) are rotationally connected to the front and rear ends of the longitudinal pressure roller (51) respectively. Each pressure roller connector (53) is provided with a pressure roller return spring (54).

7. A cardboard printing press for improving printing clarity according to claim 3, characterized in that: The fixed pressure plate assembly (31) comprises a mounting plate (33), a floating plate (34), two fixed connectors (35) and two floating springs (36). The front and rear ends of the mounting plate (33) are fixedly mounted on the same end of the front crossbeam (12) and the rear crossbeam (13). The upper parts of the two fixed connectors (35) are slidably mounted on the front and rear ends of the mounting plate (33). The lower parts of the two fixed connectors (35) are fixedly mounted on the front and rear ends of the floating plate (34). The two floating springs (36) are respectively sleeved on the two fixed connectors. (35), the upper ends of the two floating springs (36) respectively abut against the mounting plate (33), and the lower ends of the two floating springs (36) respectively abut against the floating plate (34), and a plurality of rolling balls (37) are arranged at intervals along the longitudinal direction at the lower part of the floating plate (34), and each rolling ball (37) protrudes from the bottom surface of the floating plate (34). The structure of the regulating pressure plate assembly (32) is the same as that of the fixed pressure plate assembly (31), and the front and rear ends of the mounting plate (33) of the regulating pressure plate assembly (32) are respectively slidably mounted on the front crossbeam (12) and the rear crossbeam (13).

8. A cardboard printing press for improving printing clarity according to claim 7, characterized in that: The front cross beam (12) and the rear cross beam (13) are respectively provided with an adjustment locking member (4), and the two adjustment locking members (4) are respectively fixedly connected to the front and rear ends of the mounting plate (33) of the adjustment pressure plate assembly (32), and the two adjustment locking members (4) are respectively locked and matched with the front cross beam (12) and the rear cross beam (13).

9. The cardboard printing press for improving printing clarity according to claim 8, characterized in that: The adjusting locking member (4) includes an adjusting slider (41) and an adjusting screw (42), the adjusting screw (42) is threadedly connected to the upper portion of the adjusting slider (41), a fixed card slot (43) is provided on the side of the adjusting slider (41) facing the adjusting pressure plate assembly (32), the mounting plate (33) of the adjusting pressure plate assembly (32) is inserted into the fixed card slot (43), the adjusting slider (41) of the first adjusting locking member (4) is slidably mounted on the front cross beam (12), the lower end portion of the adjusting nut of the first adjusting locking member (4) is abutted against the front cross beam (12), the adjusting slider (41) of the second adjusting locking member (4) is slidably mounted on the rear cross beam (13), the lower end portion of the adjusting nut of the second adjusting locking member (4) is abutted against the rear cross beam (13).

10. A cardboard printing press with improved printing clarity according to any one of claims 1 to 9, characterized in that: The conveying printing table (1) is also provided with at least one fan, a plurality of vacuum adsorption holes (111) are provided on the conveyor belt (11), at least one vacuum chamber is provided inside the conveyor belt (11), the vacuum chamber is communicated with each vacuum adsorption hole (111), the air inlet of the fan is communicated with the vacuum chamber, a blowing hood (7) is provided on the left and right sides of the ink carriage (21), a blowing port (71) is provided at the lower part of the blowing hood (7) along the longitudinal direction, the blowing port (71) penetrates the ink carriage (21) along the longitudinal direction, and the upper part of the blowing hood (7) is connected to the air outlet of the fan through an air duct (72).

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