Single gravure printing machine

Abstract

The utility model provides a single gravure printing machine. The single gravure printing machine comprises a paper feeding machine, an offset press, a single gravure machine, a conveying mechanism and a paper collecting machine which are sequentially connected. Paper to be printed is conveyed into the offset press from the paper feeding machine to be subjected to wet pressing and dry printing, then the paper is conveyed into the single gravure press through the conveying roller set to be subjected to dry pressing and dry printing, and the conveying mechanism conveys the printed paper into the paper collecting machine. The transmission roller group comprises a first transmission roller and a second transmission roller; the first transmission roller is provided with a plurality of rows of grippers and tooth pads corresponding to each row of grippers, and the height of each row of tooth pads is lower than the surface of the first transmission roller, that is, the top end of each row of tooth pads is lower than the surface of the first transmission roller; the second transmission roller is provided with a plurality of rows of grippers and tooth pads arranged corresponding to each row of grippers, and each row of tooth pads is higher than the surface of the second transmission roller, namely the top end of each row of tooth pads is higher than the surface of the second transmission roller.

Description

Technical Field

[0001] This utility model belongs to the field of printing machinery technology, specifically relating to a single gravure printing machine. Background Technology

[0002] Currently available gravure printing presses require multiple transfer steps to complete complex printing processes. For example, when both wet and dry printing processes need to be met simultaneously, paper must be manually removed from the wet printing press and then fed into the dry printing press. This transfer process can easily cause paper deformation, generating a large amount of waste paper and increasing printing costs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a single gravure printing machine that addresses the shortcomings of the prior art, thereby connecting and linking offset printing machines and gravure printing machines, reducing the transfer process of printed materials, reducing paper deformation and waste, improving production efficiency, and reducing printing costs.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] This utility model provides a gravure printing machine, comprising, in sequence, a paper feeder, an offset printing machine, a gravure printing machine, a conveying mechanism, and a paper take-up machine; the paper to be printed is conveyed from the paper feeder to the offset printing machine for wet-on-dry printing, and then conveyed to the gravure printing machine for dry-on-dry printing via a transfer roller assembly; the conveying mechanism conveys the printed paper to the paper take-up machine; the transfer roller assembly includes a first drive roller and a second drive roller; the first drive roller is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers, the height of each row of gripper pads is lower than the surface of the first drive roller, that is, the top of each row of gripper pads is lower than the surface of the first drive roller; the second drive roller is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers, the height of each row of gripper pads is higher than the surface of the second drive roller, that is, the top of each row of gripper pads is higher than the surface of the second drive roller.

[0006] Preferably, the offset printing press includes: an impression cylinder, a plate cylinder, a rubber cylinder, and a front paper transfer cylinder; the front paper transfer cylinder transfers paper to the impression cylinder; the plate cylinder transfers ink from the wetting unit and the ink supply unit to the rubber blanket of the rubber cylinder via a wet plate roller and an ink roller; the grippers on the impression cylinder grip the paper transferred from the front paper transfer cylinder, and the ink is printed onto the paper surface via the rubber blanket on the rubber cylinder.

[0007] Preferably, the gravure printing press includes: a paper feed cylinder, an impression cylinder, an electric pressure adjustment mechanism for the gravure cylinder, and a take-up cylinder; the paper feed cylinder receives paper from the offset printing press and conveys it to the impression cylinder for printing; the take-up cylinder conveys the printed paper to the take-up machine via the conveying mechanism; the electric pressure adjustment mechanism for the gravure cylinder monitors and adjusts the pressure between each cylinder in real time.

[0008] Even better, the top of each row of tooth pads on the second drive roller is 2mm higher than the surface of the second offset printing drive roller.

[0009] Even better, the top of each row of tooth pads on the first drive roller is 2mm below the surface of the first offset printing drive roller.

[0010] Even better, the impression cylinder of the offset printing press is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is lower than the surface of the impression cylinder of the offset printing press, that is, the top of each row of gripper pads is lower than the surface of the impression cylinder of the offset printing press. The front paper transfer cylinder of the offset printing press is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is higher than the surface of the front paper transfer cylinder of the offset printing press, that is, the top of each row of gripper pads is higher than the surface of the front paper transfer cylinder of the offset printing press.

[0011] Even better, the gravure printing press impression cylinder is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is lower than the surface of the gravure printing press impression cylinder, that is, the top of each row of gripper pads is lower than the surface of the gravure printing press impression cylinder. The gravure printing press paper transfer cylinder is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is higher than the surface of the gravure printing press paper transfer cylinder, that is, the top of each row of gripper pads is higher than the surface of the gravure printing press paper transfer cylinder.

[0012] This invention relates to a single gravure printing machine that connects and links offset printing machines and gravure printing machines, thereby reducing the transfer process of printed materials, reducing paper deformation and waste, improving production efficiency, and reducing costs.

[0013] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a single-gravure printing press.

[0015] Figure 2 This is a schematic diagram of the first transmission roller structure;

[0016] Figure 3 This is a schematic diagram of the second drive roller structure;

[0017] Figure 4 This is a schematic diagram of the electric pressure regulating mechanism of the gravure cylinder in a single gravure printing press. Detailed Implementation

[0018] Figure 1 This is a schematic diagram of a single-gravure printing press, as shown below. Figure 1 As shown, this utility model provides a gravure printing machine, which includes a paper feeder 11, an offset printing machine 12, a gravure printing machine 13, a conveying mechanism, and a paper take-up machine 14 connected in sequence. The paper to be printed is conveyed from the paper feeder 11 to the offset printing machine 12 for wet-on-dry printing, and then the paper is conveyed to the gravure printing machine 13 for dry-on-dry printing through the transfer roller group 15. The conveying mechanism conveys the printed paper to the paper take-up machine 14.

[0019] The transmission roller assembly 15 includes: a first transmission roller 6 and a second transmission roller 5;

[0020] Figure 2 This is a schematic diagram of the first drive roller structure. Please refer to it. Figure 2 As shown, the first drive roller 6 is provided with multiple rows of grippers 61 and gripper pads 62 corresponding to each row of grippers. The height of each row of grippers is lower than the surface of the first drive roller 6. Specifically, the top of each row of grippers is 2mm lower than the surface of the first drive roller 6.

[0021] Figure 3 This is a schematic diagram of the second drive roller structure. Please refer to it. Figure 3 As shown, the second drive roller 5 is provided with multiple rows of grippers 51 and gripper pads 52 corresponding to each row of grippers. The height of each row of grippers is higher than the surface of the second drive roller 5. Specifically, the top of each row of grippers is 2mm higher than the surface of the second drive roller 5.

[0022] Please refer to this again. Figure 1 As shown, the offset printing machine 12 includes: an impression cylinder 1, a plate cylinder 2, a rubber cylinder 3, and a front paper transfer cylinder 4.

[0023] The paper feed roller 4 of the offset printing press transfers paper to the impression cylinder 1. The plate cylinder 2 of the offset printing press transfers the ink and water from the wetting unit and the ink supply unit to the blanket of the rubber cylinder 3 of the offset printing press through the wet plate roller and the ink roller. The grippers on the impression cylinder 1 of the offset printing press hold the paper transferred from the paper feed roller 4, and the ink and water are printed onto the surface of the paper through the blanket of the rubber cylinder 3.

[0024] The single gravure printing press 13 includes: a gravure paper feed roller 7, a gravure impression roller 8, a gravure roller electric pressure adjustment mechanism 9, and a gravure roller take-up roller 10; the gravure paper feed roller 7 receives paper from the offset printing press and conveys the paper to the gravure impression roller 8 for printing, and the gravure roller take-up roller 10 conveys the printed paper to the take-up machine 14 through the conveying mechanism; the gravure roller electric pressure adjustment mechanism 9 monitors and adjusts the pressure between each roller in real time.

[0025] Specifically, please refer to Figure 4 As shown, Figure 4 This is a schematic diagram of the electric pressure adjustment mechanism for the gravure cylinder of a single gravure printing press. A toothed block 92 is fixed on the eccentric sleeve 91 of the electric pressure adjustment mechanism 9. The rotation of the toothed block 92 causes the eccentric sleeve 91 to rotate at a certain angle, ensuring the printing pressure between the electric pressure adjustment mechanism 9 and the printing cylinder 8 of the gravure printing press. The rotation of the toothed block 92 is driven by the rotation of the meshing gear shaft 93; the rotation of the gear shaft 93 is accomplished by the up-and-down movement of the meshing rack 94; the up-and-down movement of the rack 94 is accomplished by the push of the cylinder rod 95 mounted on the rack 94; the cylinder seat 96 is mounted on the middle part of the swing rod 97, one end of which is sleeved on a support shaft fixed to the wall panel, and the other end of the swing rod 97 is connected to a linear motor 98 with a potentiometer. The other end of the linear motor 98 is connected to the support fixed to the wall panel.

[0026] The linear motor 98 with potentiometer is controlled by the operation panel to move linearly, and the rotation angle of the rocker arm 97 is adjusted, which drives the cylinder 99 and the rack 94 to move up and down, thereby driving the gear shaft 93 that meshes with the rack 94 to rotate, thereby driving the gear block 92 that meshes with the gear shaft 93 to rotate, thus driving the eccentric sleeve 91 to rotate.

[0027] Because the rotation angle of the eccentric sleeve 91 during pressure adjustment is less than 1.5 degrees, and the arc length traversed in the radial direction is less than 2.5 mm, the ratio to the radius is very small. Therefore, the arc length is approximately a straight line. Thus, a linear potentiometer from a linear motor is directly used to monitor the straight-line distance traversed by the outer diameter of the eccentric sleeve 91. After detecting the rotational change of the eccentric sleeve 91, the potentiometer converts the change into the corresponding value of the center distance of the gravure printing press's impression cylinder 8, which is then displayed on the screen. Since the change of the eccentric sleeve 91 is directly monitored, without any other intermediate errors, the monitored value accurately reflects the change in the center distance of the gravure printing press's impression cylinder 8, i.e., the pressure between the cylinders.

[0028] Please refer to this. Figure 2 and Figure 3The offset printing press unit's impression cylinder 1 is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is lower than the surface of the offset printing press unit's impression cylinder 1, that is, the top of each row of gripper pads is lower than the surface of the offset printing press unit's impression cylinder 1. The offset printing press unit's front paper transfer cylinder 4 is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is higher than the surface of the offset printing press unit's front paper transfer cylinder 4, that is, the top of each row of gripper pads is higher than the surface of the offset printing press unit's front paper transfer cylinder 4.

[0029] The gravure printing press impression cylinder 8 is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is lower than the surface of the gravure printing press impression cylinder 8, that is, the top of each row of gripper pads is lower than the surface of the gravure printing press impression cylinder 8. The gravure printing press paper transfer cylinder 7 is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is higher than the surface of the gravure printing press paper transfer cylinder 7, that is, the top of each row of gripper pads is higher than the surface of the gravure printing press paper transfer cylinder 7.

[0030] This invention enables the connection and linkage between offset printing and gravure printing, thereby reducing the transfer process of printed materials, reducing waste caused by paper deformation, realizing continuous operation of offset printing and gravure printing, and saving labor.

[0031] It should be noted that the gravure printing machine of this utility model can not only be combined with offset printing machines. Based on the technology disclosed in this utility model, those skilled in the art can also expand it to include more functional printing machines, such as laser printers, inkjet printers, flatbed inspection machines, cold foil stamping machines, etc.

Claims

1. A single-gravure printing machine, characterized in that, The single gravure printing press includes, in sequence, a paper feeder, an offset printing press, a single gravure printing press, a conveying mechanism, and a paper take-up machine; the paper to be printed is conveyed from the paper feeder to the offset printing press for wet-on-dry printing, and then the paper is conveyed to the single gravure printing press for dry-on-dry printing via a transfer roller assembly; the conveying mechanism conveys the printed paper to the paper take-up machine. The transmission roller assembly includes: a first transmission roller and a second transmission roller; The first drive roller is provided with multiple rows of grippers and corresponding gripper pads for each row of grippers. The height of each row of gripper pads is lower than the surface of the first drive roller, that is, the top of each row of gripper pads is lower than the surface of the first drive roller. The second drive roller is provided with multiple rows of grippers and corresponding gripper pads for each row of grippers. The height of each row of gripper pads is higher than the surface of the second drive roller, that is, the top of each row of gripper pads is higher than the surface of the second drive roller.

2. The single-gravure printing machine as described in claim 1, characterized in that, The offset printing machine includes: an impression cylinder, a plate cylinder, a rubber cylinder, and a front paper transfer cylinder. The paper feed cylinder of the offset printing press transfers paper to the impression cylinder. The plate cylinder transfers the ink and water from the wetting unit and the ink supply unit to the blanket of the rubber cylinder via the wet plate roller and the ink roller. The grippers on the impression cylinder grip the paper from the paper feed cylinder and print the ink and water onto the paper surface via the blanket of the rubber cylinder.

3. The single-gravure printing machine as described in claim 1, characterized in that, The single gravure printing press includes: a paper feed cylinder, an impression cylinder, an electric pressure adjustment mechanism for the gravure cylinder, and a take-up cylinder. The paper feed cylinder receives paper from the offset printing press and transfers it to the impression cylinder for printing. The take-up cylinder transfers the printed paper to the take-up machine via the conveying mechanism. The electric pressure adjustment mechanism for the gravure cylinder monitors and adjusts the pressure between each cylinder in real time.

4. The single-gravure printing machine as described in claim 1, characterized in that, The top of each row of tooth pads on the second drive roller is 2mm higher than the surface of the second offset printing drive roller.

5. The single-gravure printing machine as described in claim 1, characterized in that, The top of each row of tooth pads on the first drive roller is 2mm below the surface of the first offset printing drive roller.

6. The single-gravure printing machine as described in claim 2, characterized in that, The offset printing press unit's impression cylinder is equipped with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is lower than the surface of the offset printing press unit's impression cylinder, that is, the top of each row of gripper pads is lower than the surface of the offset printing press unit's impression cylinder. The front paper feed roller of the offset printing press is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is higher than the surface of the front paper feed roller of the offset printing press, that is, the top of each row of gripper pads is higher than the surface of the front paper feed roller of the offset printing press.

7. The single-gravure printing machine as described in claim 3, characterized in that, The gravure printing press cylinder is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of grippers is lower than the surface of the gravure printing press cylinder, that is, the top of each row of grippers is lower than the surface of the gravure printing press cylinder. The paper feed roller of the gravure printing machine is provided with multiple rows of grippers and gripper pads corresponding to each row of grippers. The height of each row of gripper pads is higher than the surface of the paper feed roller of the gravure printing machine, that is, the top of each row of gripper pads is higher than the surface of the paper feed roller of the gravure printing machine.

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