High-speed curved printer capable of checking edition automatically

[0013] Figure 1 shows the structure diagram of the entire curved printing machine. The entire curved printing machine is driven by a motor. When the motor starts, part of the movement of the motor drive shaft is transmitted to the big rubber roller via the drive shaft with universal coupling 12 8. The other part is transmitted to the material tray 10 through the belt pulley and the camshaft 40. The motor drive shaft, the drive shaft with the universal joint 12 and the camshaft 40 rotate synchronously (that is, their mutual transmission ratio is 1), The motor drive shaft, the drive shaft with the universal joint 12 and the camshaft 40 are collectively referred to as the main drive shaft system, and the transmission ratio of the main drive shaft to the large rubber roller and the material tray is 8:2:1.

[0014] A high-speed curved printing machine capable of automatic plate registration, including a large rubber roller 8 on which a transfer blanket 7 is fixed, and an assembly of various color plate rollers 1, 2, 3, 4, 5, and 6 that are matched with the large rubber roller 8. The material tray 10 matched with the large rubber roller 8 and the mold handle 9 mounted on it, the main drive shaft system containing the camshaft 40 that drives the large rubber roller 8 and the material disk 10 to rotate; A mandrel 27 with an inner sleeve 28 and an outer sleeve 29; a longitudinal register driving device 22 and a transverse register driving device 23 are provided in the plate roller assembly, and a control device for the register driving device is added; the transverse sleeve The quasi-driving device 23 includes a spindle pin 30 that passes through the spindle 27 and is fixed to the spindle. The two ends of the spindle pin 30 pass through the holes on the inner sleeve 28 and the outer sleeve 29 and are inserted into the outer sleeve 29. On the thread adjustment sleeve 31, there is a worm gear 33 on the thread adjustment sleeve 31 that is threaded with it, and the worm gear 33 is meshed with a worm 32 driven by the stepping motor 13; the longitudinal registration drive device 22 includes a shaft 27 passing through The inner shaft pin 34 of the hole, both ends of the inner shaft pin 34 pass through the inner shaft sleeve 28 and are fixed with the inner shaft sleeve, and then pass through the hole on the outer shaft sleeve 29 to insert on the threaded adjustment sleeve 35 sleeved on the outer shaft sleeve , The thread adjusting sleeve 35 has a worm gear 36 that is threaded with it, and a worm 37 driven by the stepping motor 14 is engaged with the worm gear 36; the control device of the register drive device includes a rotary photoelectric encoder 11 installed on the main drive shaft system , The CCD camera 16 for color mark image collection, which is placed between the last plate roller 6 and the mold bar 9, the signal input end is connected to the signal output end of the CCD camera 16, the PC 17 (computer), the signal input end The PLC controller 18 is respectively connected to the signal output terminal of the PC 17 and the rotary photoelectric encoder 11. The signal output terminal of the PLC controller 18 is respectively connected to the camera switch control terminal of the CCD camera 16, the longitudinal register driving device 22 and the horizontal sleeve. The stepping motors 13, 14 in the quasi-driving device 23 are connected. Like the existing curved printing machine, the outer sleeve 29 of the mandrel 27 in the plate roller assembly is covered with a plate roller 6 and a circumferential adjustment helical gear device 20, between the circumferential adjustment helical gear device 20 and the plate roller 6. Connected with a guide rod 25, the plate roller assembly also includes a spindle pin 26 that passes through the spindle 27 and is fixed to the spindle. Both ends of the spindle pin 26 pass through the holes on the inner sleeve 28 and the outer sleeve 29 and The circumferential adjustment helical gear device 20 is fixed, and the plate roller assembly also includes an inner shaft pin 24 that passes through the inner sleeve 28 and is fixed to the inner sleeve, and then passes through the hole on the outer sleeve 29 to be fixed to the plate roller 6 , The plate roller assembly is also provided with a rear end support 19 and a front end support 21. In specific implementation, in order to support the worms 32 and 37, the longitudinal register driving device 22 and the transverse register driving device 23 also include housings 39, 38 fixed on the outer sleeve 27, the worms 32, 37 and the stepping motor 13 , 14 are respectively supported and fixed on the shells 39 and 38. In this specific embodiment, for ease of installation, the rotary photoelectric encoder 11 is installed on the camshaft 40 in the main drive shaft system.

[0015] During the start-up process of the curved surface printing machine, the plate rollers are sorted and coarsely adjusted in the low-speed state and manual plate mode. The sorting and coarse adjustment are adjusted by manual manual stepping motor forward and reverse, the purpose is to adjust each color The plate roller performs printing sequence and preliminary alignment, and then switches the system to high-speed automatic detection of plate registration status, so that the plate registration system realizes closed-loop automatic control, and further fine-tunes on the basis of manual adjustment.

[0016] In the state of high-speed operation of the curved surface printing machine, each color plate roller 1, 2, 3, 4, 5, 6 will be printed on the upper edge of the transfer blanket 7 while registering the color on the transfer blanket 7 of the large rubber roller. The last cross color code 15 is used to identify the accuracy of color registration. The horizontal line of the cross color code represents the circumferential direction of the plate roller, and the vertical line represents the axial direction of the plate roller. Each adjacent color code is when the color registration is accurate (ie The standard template described later) should be horizontal lines on a straight line, and vertical lines equally spaced and parallel. The real-time color mark pattern is collected by the CCD camera 16 and inputted into the PC 17, after the comparison analysis, calculation and logical judgment with the standard template are carried out with the support of the corresponding software, the deviation instruction is issued to the PLC controller 18, and the PLC controller 18 The actuator-stepping motors 13 and 14 output the control value, adjust the relative position of the plate roller, and realize the corresponding corrective movement of the plate roller, thereby eliminating the printing registration error and realizing dynamic automatic plate registration. In the entire printing press, the control process of the CCD camera 16 to collect the color mark image is realized as follows: The rotary photoelectric encoder 11 installed on the main transmission shaft system (specifically installed on the camshaft) outputs three sets of square wave pulses A, The B and Z phases are sent to the PLC controller 18; the A and B phases are high-speed pulses, and the Z phase is one pulse per revolution of the large rubber roller, which is used for reference point positioning. Here, the A and B phase pulses can be used to control the camera switch of the CCD camera 16. Each time the rotary photoelectric encoder 11 sends out a Z phase pulse, the counter in the PLC controller is set to zero, and the number of phase A and B pulses is counted. When the transfer blanket 7 on the rubber roller 8 turns to the field of view of the CCD camera 16 (corresponding to a specific count value of the number of A and B phase pulses), the PLC controller 18 controls the CCD camera 16 to start collecting color mark image data. The number of counting pulses of phase A and B emitted by the rotary photoelectric encoder 11 can be adjusted according to the corresponding position of the color mark on the large rubber roller, so as to control the camera work accurately and on time.

[0017]The control command (deviation correction signal) issued by the PLC controller 18 reaches and drives the stepping motor 13 in the transverse register drive device 23. When the worm 32 drives the worm gear 33 to rotate forward and backward, the thread adjustment sleeve 31 drives the spindle pin 30 and the center. The shaft 27 moves left or right in the axial direction (within the aperture range of the holes on the inner and outer sleeves 28, 29), and through the function of the original spindle pin 26, the entire circumferential adjustment of the helical gear device 20 on the surface is helical. Combined with the movement of the original spindle pin 26, circumferential rotation and axial movement occur. The guide rod 25 digests this axial movement by moving in the left and right gaps, but only transmits the circumferential rotation to the plate roller. 6, so that the plate roller 6 realizes the adjustment of the circumferential direction (also called the transverse direction); similarly, the longitudinal register driving device 22 and the transverse register driving device 23 are similar in structure, except that the inner shaft pin is fixed with the inner sleeve 28 34 is inserted into the thread adjusting sleeve through the holes on the spindle 27 and the outer sleeve 29. When the deviation correction signal drives the stepping motor 14 in the longitudinal register drive device 22, the worm 37 drives the worm wheel 36 to rotate. The transmission effect of the thread adjustment sleeve 35 drives the inner shaft pin 34 and the inner shaft sleeve 28 to move left or right in the axial direction. Through the original inner shaft pin 24, the axial adjustment of the plate roller 6 (the axial direction) is realized. Adjust within the aperture range of the holes on the outer sleeve 29 and the mandrel 27). The above is an adjustment process of the plate roller 6 assembly. The same register adjustment device is installed on the six plate roller assemblies, so that the correct adjustment of each plate roller of the entire curved printing machine is realized.