Automatic rotating digital printing machine

Abstract

The invention discloses an automatic rotating digital printing machine which comprises a base, an air suction unit installed on the base and a printing trolley installed above the air suction unit in a sliding mode, a cross beam stretching across the air suction unit is fixed to the base, and a sliding base is arranged on the lower side edge of the cross beam in a sliding mode. A power rotating shaft is fixed to the middle of the upper side of the printing trolley, the power rotating shaft is rotatably installed on a sliding base, and a locking device is arranged on the upper side of the printing trolley so that the angle of the printing trolley after rotation can be locked. The whole printing trolley is driven by the power rotating shaft to automatically rotate below the sliding base, and therefore automatic switching can be achieved compared with a manual rotating mode in the prior art.

Description

Technical Field

[0001] The invention relates to a printing press, and more particularly to an automatic rotary digital printing press. Background Art

[0002] The existing digital printing machines mainly print corrugated paper in two ways: scanning and direct spraying. The existing digital printing machines set a rotating trolley above the suction unit and set the nozzle in the rotating trolley, so as to realize the switching between the scanning and direct spraying modes by rotating the rotating trolley. The existing rotating trolley currently adopts a manual rotation structure, that is, a side beam is set on the suction unit, and a base is slidably set on the side beam. The rotating trolley is installed on the base through a turning power shaft. When switching is required, the rotating trolley is manually driven to rotate, thereby realizing the switching between the scanning and direct spraying modes. However, the above manual method has the problem of low switching efficiency. Summary of the invention

[0003] In view of the shortcomings of the prior art, an object of the present invention is to provide an automatic rotary digital printing machine with high switching efficiency between scanning and direct injection modes.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic rotating digital printing machine, comprising a base, a suction unit installed on the base, and a printing carriage slidably installed above the suction unit, a crossbeam spanning the suction unit is fixed on the base, a sliding base is slidably provided on the lower side of the crossbeam, a power shaft is fixed to the middle part of the upper side of the printing carriage, the power shaft is rotatably installed on the sliding base, and a locking device is also provided on the upper side of the printing carriage to lock the angle of the printing carriage after rotation.

[0005] As a further improvement of the present invention, the printing carriage includes a shell, a nozzle array installed on the lower side of the shell, an ink cartridge installed in the shell, and a thermostat. The ink cartridge, the thermostat and the nozzle array are interconnected by a pipeline to heat the ink output from the ink cartridge and then send it to the nozzle array, so that the ink is output at a constant temperature.

[0006] As a further improvement of the present invention, the locking device includes a magnetic locking block and two locking electromagnets. The two locking electromagnets are fixedly mounted on the upper side of the printing carriage, and the magnetic locking block is fixedly mounted on the lower side of the sliding base, so that after the printing carriage is rotated into place, one of the locking electromagnets magnetically attracts the magnetic locking block to lock the printing carriage in place.

[0007] As a further improvement of the present invention, a plurality of mounting rods are fixed on the crossbeam, a mounting frame is fixed on the base, and the ends of the plurality of mounting rods are movably mounted on the mounting frame to drive the crossbeam to move up and down above the base.

[0008] As a further improvement of the present invention, a lifting angle steel is installed on the side of the mounting frame so that it can be raised and lowered. The end of the mounting rod is fixed to the upper side of the lifting angle steel by bolts. The upper side of the mounting frame is provided with a driving device for driving the lifting angle steel to rise and fall.

[0009] As a further improvement of the present invention, the driving device includes a driving motor and a plurality of bevel gear elevators, and the plurality of bevel gear elevators are respectively and correspondingly installed on the mounting frame at the position relative to the lifting angle steel. The bevel gear elevator has an input shaft and an output shaft, and the input shaft is linked to the driving motor, and the output shaft passes downward through the mounting frame and is threadedly connected to the lifting angle steel.

[0010] As a further improvement of the present invention, an ink stack is fixedly installed on one side of the base, an ink collecting box is provided on one side of the ink stack, and an ink suction device is provided at a position of the base close to the ink collecting box. The ink stack, the ink collecting box and the ink suction device are connected by a pipeline to absorb the ink beads on the lower side of the printing carriage into the ink collecting box through the ink stack.

[0011] As a further improvement of the present invention, the ink stack includes an ink stack base, a plurality of cleaning pads and a plurality of ink extraction pads. The plurality of cleaning pads are arranged in a row near the side of the ink stack base, and the plurality of ink extraction pads are arranged on the ink stack base so as to absorb ink beads on the printing carriage through the cleaning pads and provide the printing carriage with moisturizing through the ink extraction pads.

[0012] As a further improvement of the present invention, the suction unit includes a belt and a bellows arranged in the belt, the upper side of the bellows is open, a plurality of through holes are opened on the belt, an air duct is passed through the bellows, one end of the air duct extends to the inner wall of the bellows and is then closed, and the other end is connected to an external fan through an air duct adapter, two or more partitions are provided in the bellows to divide the interior of the bellows into suction grooves, and ventilation holes are opened on the top surface and side surfaces of the air duct in the suction groove.

[0013] As a further improvement of the present invention, it also includes a front edge paper feeding device, which is arranged above the position of the base relative to the entrance end of the suction unit to guide the corrugated paper into the suction unit. The front edge paper feeding device includes a front edge base and a front paper stopper assembly. The upper side surface of the front edge base is rotatably provided with a plurality of rollers to roll and drive the corrugated paper into the suction unit. The front paper stopper assembly is arranged between the front edge base and the suction unit to intermittently block the corrugated paper so that the corrugated paper is fed into the suction unit one by one.

[0014] The beneficial effect of the present invention is that, through the setting of the crossbeam, the printing carriage can be slidably installed above the suction unit, and at the same time, the middle part of the printing carriage is rotatably connected to the sliding base, so that the automatic rotation switching of the printing carriage can be realized. Compared with the side crossbeam plus side flipping method used in the prior art, the switching efficiency is higher. At the same time, the power shaft is installed in the middle part of the printing carriage to achieve a more balanced load on the printing carriage. Compared with the single-side flipping method used in the prior art, the service life is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the automatic rotary digital printing machine of the present invention; Figure 2 for Figure 1 The overall structure diagram of the printing carriage; Figure 3 for Figure 1 The overall structural diagram of the middle crossbeam; Figure 4 for Figure 1 The overall structural diagram of the lifting part of the middle crossbeam; Figure 5 for Figure 1 The overall structure diagram of the China-Mozhan stack; Figure 6 for Figure 5 The overall structure diagram of the cleaning pad; Figure 7 for Figure 1 The overall structure diagram of the middle suction unit; Figure 8 for Figure 7 The overall structure of the stroke box; Fig. 9 for Figure 1 The overall structural diagram of the middle front edge paper feeding device; Fig.10 for Fig. 9 The overall structure diagram of the middle front paper stop assembly. DETAILED DESCRIPTION

[0016] The present invention will be further described below in detail with reference to the embodiments shown in the accompanying drawings.

[0017] Reference Figure 1As shown, an automatic rotary digital printing machine of the present embodiment comprises a base 1, a suction unit 2 mounted on the base 1, and a printing carriage 3 slidably mounted above the suction unit 2, wherein the base 1 is fixed with a crossbeam 4 spanning the suction unit 2, and a sliding base 5 is slidably provided on the lower side of the crossbeam 4, a power shaft 31 is fixed to the middle part of the upper side of the printing carriage 3, and the power shaft 31 is rotatably mounted on the sliding base 5, and a locking device 32 is provided on the upper side of the printing carriage 3 to lock the angle after the printing carriage 3 is rotated. During printing, the sliding base 5 slides along the crossbeam 4 above the suction unit 2 to drive the translation of the printing carriage 3, and when the printing carriage 3 needs to switch modes, a combination of the power shaft 31 and the locking device 32 is used, and the motor arranged on the power shaft 31 is used to drive the printing carriage 3 to slide The printing carriage 3 is shifted and rotated below the base 5. Compared with the manual rotation switching adopted in the prior art, the automatic rotation switching is realized. At the same time, compared with the side flipping method adopted in the prior art, the rotation of the printing carriage 3 is more stable and reliable, and the centrifugal force during the rotation of the power shaft part is smaller, and the service life of the rotation power shaft of the printing carriage 3 is longer. In addition, the locking device 32 in this embodiment can adopt two methods: internal locking and external locking. The internal locking is to set the power source of the power shaft 31 to a servo motor, and use the angle locking method of the servo motor to realize internal locking, or to adopt an external locking method, that is, to set a corresponding locking and unlocking structure on the upper side of the printing carriage 3 to realize external locking, or to adopt a combination of the two methods to improve the stability of the printing carriage 3 during operation. Either method can realize the automatic rotation switching of the printing carriage 3.

[0018] Furthermore, the printing carriage 3 includes a shell 33, a nozzle array 34 installed on the lower side of the shell 33, an ink cartridge 35 installed in the shell 33, and a thermostat. The ink cartridge 35, the thermostat and the nozzle array 34 are interconnected by a pipeline to heat the ink output by the ink cartridge 35 and then send it to the nozzle array 34, so that the ink is output at a constant temperature. Compared with the prior art that does not adopt a heating method, the viscosity of the ink can be reduced after constant temperature control of ink heating, thereby avoiding the problems of poor ink fluidity and mismatch of printing waveforms, and making the ink output of the nozzle array 34 smoother.

[0019] Furthermore, the thermostat includes an input pipeline and an output pipeline, both of which are connected to an external constant temperature water device. A temperature-controlled U-shaped tube is passed through the ink cartridge 35, and both of which are connected to the temperature-controlled U-shaped tube in the ink cartridge 35 through pipes, so as to provide constant temperature water to enter the temperature-controlled U-shaped tube in the ink cartridge 35 for circulation and then return to the external constant temperature water device from the output pipeline. By circulating hot water into the temperature-controlled U-shaped tube to heat the ink, the heating of the ink can be achieved more evenly, avoiding problems caused by uneven temperature of the ink. When the temperature is high, cold water can be used to reduce the temperature, thereby achieving constant temperature control simply and effectively.

[0020] Furthermore, the present embodiment provides the following locking device 32, which includes a magnetic locking block 322 and two locking electromagnets 321. The two locking electromagnets 321 are fixedly mounted on the upper side of the printing carriage 3, and the magnetic locking block 322 is fixedly mounted on the lower side of the sliding base 5, so that after the printing carriage 3 is rotated into place, one of the locking electromagnets 321 magnetically attracts the magnetic locking block 322 to lock the printing carriage 3 in place. On the one hand, the locking electromagnet 321 and the magnetic locking block 322 are locked by magnetic adsorption. Compared with the traditional mechanical locking structure, the response speed is faster, and the locking action can be quickly completed at the moment the printing carriage 3 is rotated into place, thereby greatly improving the work efficiency. On the other hand, the magnetic adsorption method avoids the wear caused by mechanical contact, prolongs the service life of the locking device 32, and reduces the maintenance cost.

[0021] Furthermore, the present embodiment provides the following sliding base 5 structure, wherein the sliding base 5 comprises a base plate 51 and a plurality of base sliders 52, wherein the plurality of base sliders 52 are fixedly mounted on the upper side of the base plate 51, a slide rail 41 is fixed to the lower side of the cross beam 4, and the plurality of base sliders 52 are slidably arranged on the slide rail 41, so that the base plate 51 is slidably arranged below the cross beam 4, and a linear motor stator 42 arranged side by side with the slide rail 41 is also fixed to the position of the cross beam 4 close to the slide rail 41, and a linear motor mover 53 is arranged on the upper side of the base plate 51 relative to the lower side of the linear motor stator 42. When the linear motor mover 53 is energized, it generates electromagnetic interaction with the linear motor stator 42, driving the base plate 51 to slide on the slide rail 41 through the base slider 52. Accurate and smooth sliding of the base plate 51 below the cross beam 4 is achieved.

[0022] Furthermore, the present embodiment provides the following structure of the crossbeam 4, wherein a plurality of mounting rods 43 are fixed on the crossbeam 4, a mounting frame 11 is fixed on the base 1, and the ends of the plurality of mounting rods 43 are mounted on the mounting frame 11 in a movably movable manner to drive the crossbeam 4 to move up and down above the base 1. The lifting and lowering of the crossbeam 4 is achieved by changing the mounting height of the mounting rods 43 on the mounting frame 11. The height of the crossbeam 4 can be adjusted according to actual work requirements, thereby improving the applicability of the equipment.

[0023] Furthermore, the present embodiment provides the following structure for driving the cross beam 4 to move up and down, wherein a lifting angle steel 12 is installed on the side of the mounting frame 11 in a liftable manner, the end of the mounting rod 43 is fixedly installed on the upper side of the lifting angle steel 12 by bolts, and a driving device 13 for driving the lifting angle steel 12 to move up and down is provided on the upper side of the mounting frame 11. The driving device 13 drives the lifting angle steel 12 to move up and down, thereby driving the mounting rod 43 and the cross beam 4 to move up and down. The structure is simple, easy to operate and maintain, and can effectively control the lifting of the cross beam 4.

[0024] Furthermore, the present embodiment provides the following driving device 13, which includes a driving motor 131 and a plurality of bevel gear elevators 132, wherein the plurality of bevel gear elevators 132 are respectively mounted on the mounting frame 11 at positions relative to the lifting angle steel 12 in a one-to-one correspondence, and the bevel gear elevator 132 has an input shaft and an output shaft, wherein the input shaft is linked with the driving motor 131, and the output shaft is threadedly connected with the lifting angle steel 12 after passing through the mounting frame 11 downward. The driving motor 131 drives the input shaft of the bevel gear elevator 132 to rotate, and the output shaft is rotated through the bevel gear transmission, and since the output shaft is threadedly connected with the lifting angle steel 12, the lifting and lowering of the lifting angle steel 12 is realized. At the same time, the transmission of the bevel gear elevator 132 is utilized to realize smooth and precise lifting control, and can withstand a large load.

[0025] Furthermore, the bevel gear elevator 132 also has a linkage shaft. There are four bevel gear elevators 132, which are respectively located at the four corners of the mounting frame 11. The driving motor 131 is located between two bevel gear elevators 132, and is coaxially fixed with the input shafts of the two bevel gear elevators 132 through a gear box. The linkage shafts of the other two bevel gear elevators 132 are coaxial with the linkage shafts of the two bevel gear elevators 132 on one side of the driving motor 131. The driving motor 131 drives the two bevel gear elevators 132 through the gear box, and the two bevel gear elevators 132 drive the other two bevel gear elevators 132 to work synchronously through the linkage shaft. The synchronous operation of the four bevel gear elevators 132 is ensured, so that the lifting angle steel 12 can be lifted and lowered smoothly to avoid tilting.

[0026] Furthermore, an ink stack 6 is fixedly mounted on one side of the base 1, an ink collection box 61 is provided on one side of the ink stack 6, and an ink suction device 62 is provided on the position of the base 1 near the ink collection box 61. The ink stack 6, the ink collection box 61 and the ink suction device 62 are connected by a pipeline, so that the ink beads on the lower side of the printing carriage 3 are sucked into the ink collection box 61 through the ink stack 6. The ink suction device 62 generates suction force, and the ink stack 6 sucks the ink beads on the printing carriage 3 through the pipeline and transports them to the ink collection box 61. The ink in the printing carriage 3 is cleaned in time when the machine is stopped to ensure the printing quality and prevent color bleeding caused by manual hand wiping.

[0027] Furthermore, the present embodiment provides the following structure of an ink stack 6, wherein the ink stack 6 comprises an ink stack base 63, a plurality of cleaning pads 64 and a plurality of ink extraction pads 65, wherein the plurality of cleaning pads 64 are arranged in a row near the side of the ink stack base 63, and the plurality of ink extraction pads 65 are arranged on the ink stack base 63, so as to provide the printing carriage 3 with moisturizing and ink absorption through the ink extraction pads 65, and the cleaning pads 64 clean the ink beads remaining on the printing carriage 3 after ink absorption. The ink extraction pads 65 absorb the ink beads by the suction force generated by the ink absorption device 62, and the number and position of the ink extraction pads 65 correspond to the number and position of the nozzles on the nozzle array 34, and absorb the residual ink in the nozzle array 34 after printing, and then further clean the residual ink beads on the surface of the nozzle array 34 after absorption through the cleaning pads 64.

[0028] Furthermore, the present embodiment provides the following cleaning pad 64 structure, wherein an ink absorbing groove 641 is provided on the upper side of the cleaning pad 64, a waist-shaped hole is provided at the bottom of the ink absorbing groove 641 to communicate with the ink collecting box 61, and the ink absorbing groove 641 is in the shape of a long strip, and the cross section of the ink absorbing groove 641 is in the shape of an inverted trapezoid. The ink absorbing groove 641 increases the contact area with the ink beads, and the inverted trapezoidal cross section facilitates the ink beads to slide off, and the ink beads are transported to the ink collecting box 61 through the waist-shaped hole. The ink absorbing efficiency is improved, and the ink beads are ensured to be recovered smoothly.

[0029] Furthermore, the present embodiment provides the following structure of the ink extraction pad 65, wherein the side edges of the upper side of the ink extraction pad 65 are provided with blocking edges 651, and the blocking edges 651 are connected end to end to form a groove structure on the upper side of the ink extraction pad 65. The groove structure formed by the blocking edges 651 can help maintain the humidity on the ink extraction pad 65. The moisturizing effect of the printing carriage 3 is improved, and at the same time, during the process of extracting ink, the sealing effect between the upper end surface of the ink extraction pad 65 and the nozzle is enhanced, and the residual ink in the nozzle array 34 is absorbed.

[0030] Furthermore, the present embodiment provides the following structure of the air suction unit 2, wherein the air suction unit 2 comprises a belt 21 and a bellows 22 arranged in the belt 21, the upper side of the bellows 22 is open, the belt 21 is provided with a plurality of through holes, an air duct 23 is provided in the bellows 22, one end of the air duct 23 is extended to the inner wall of the bellows 22 and then is closed, and the other end is connected to the external fan through the air duct adapter, the bellows 22 is provided with two or more partitions 24 to divide the inside of the bellows 22 into air suction grooves, and the top surface and side surfaces of the air duct 23 in the air suction groove are provided with ventilation holes. The external fan extracts the air in the bellows 22 through the air duct 23 to generate negative pressure, which plays a role in sucking the corrugated paper on the air suction unit 2. The stability of the air suction unit 2 when printing on the corrugated paper is ensured, and at the same time, the structural setting of the air duct 23 running through the entire bellows 23 can enhance the support strength of the top of the bellows 22, so that it can adapt to corrugated paper with a heavier weight.

[0031] Furthermore, the present embodiment provides the following partition 24 structure, wherein the partition 24 includes a plate body 241 and a slide bar 242, the two ends of the slide bar 242 are fixedly mounted on the inner wall of the bellows 22, and the plate body 241 is slidably arranged on the slide bar 242, so as to slide relative to or in opposite directions or in the same direction in the bellows 22, so as to change the size and position of the air suction groove. By moving the position of the plate body 241 on the slide bar 242, the size and position of the air suction groove are changed, thereby adjusting the direction and strength of the air suction. In this way, the air suction state of the bellows 22 can be flexibly adjusted according to the condition of the corrugated paper, so as to ensure the reliability during printing.

[0032] Furthermore, in this embodiment, a structure is provided to drive the movement of the partition 24. A screw rod is rotatably provided in the bellows 22, and a screw rod nut is provided on the partition 24. The screw rod nut is sleeved on the screw rod and is threadedly connected with the screw rod. The screw rod is rotated so that the screw rod nut drives the partition 24 to move on the slide rod 242. The precise control of the movement of the partition 24 is achieved, and the operation is simple.

[0033] Furthermore, a plurality of bellows support rods 25 are arranged on the upper side of the bellows 22, and the plurality of bellows support rods 25 form a fence structure on the upper side of the bellows. The fence structure formed by the bellows support rods 25 supports the belt 21, prevents the belt 21 from sinking due to force, and enhances the supporting force of the bellows 22.

[0034] Furthermore, the automatic rotary digital printing machine of this embodiment also includes a front edge paper feeding device 7, which is arranged above the position of the base 1 relative to the entrance end of the suction unit 2 to guide the corrugated paper into the suction unit 2, and the front edge paper feeding device 7 includes a front edge base 71 and a front paper stopper assembly 72, and the upper side surface of the front edge base 71 is rotatably provided with a plurality of rollers 73 to roll and drive the corrugated paper into the suction unit 2, and the front paper stopper assembly 72 is arranged at a position between the front edge base 71 and the suction unit 2 to intermittently block the corrugated paper, so that the corrugated paper is fed into the suction unit 2 one by one. The rotation of the roller 73 drives the corrugated paper forward, and the front paper stopper assembly 72 intermittently blocks, so that the corrugated paper is fed one by one. It is ensured that the corrugated paper enters the suction unit 2 accurately and one by one to avoid paper jams.

[0035] Furthermore, the present embodiment provides the following front paper stopper assembly 72, the front paper stopper assembly 72 includes a side stopper 721 and a middle stopper 722 and a driving assembly 723 for driving the middle stopper 722 to rise and fall, the driving assembly 723 includes a driving shaft 7231 rotatably mounted on the middle stopper 722, the driving shaft 7231 is eccentrically sleeved with a lifting wheel 7232 at a position relative to the middle stopper 722, two receiving plates 7233 are fixed at a position near the upper end of the middle stopper 722 at intervals, and the lifting wheel 7232 is accommodated between the two receiving plates 7233. The rotation of the driving shaft 7231 drives the eccentric lifting wheel 7232 to rotate, and the lifting wheel 7232 moves between the two receiving plates 7233, thereby driving the middle stopper 722 to rise and fall. The middle stopper 722 is automatically lifted and lowered, and the conveying rhythm of the corrugated paper is effectively controlled. At the same time, the overall structure is simple and easy to implement.

[0036] Furthermore, the present embodiment also provides a structure in which the side baffles 721 and the middle baffles 722 are adjustable in the horizontal direction. Specifically, the front paper baffle assembly 72 also includes a translation rail 724 and a translation screw 725. The sliding rail 724 and the translation screw 725 are arranged side by side between the front edge base 71 and the air suction unit 2. The side baffles 721 and the middle baffle 722 can be slidably arranged on the translation rail 724 and are threadedly driven with the translation screw 725. By rotating the translation screw 725, the side baffles 721 and the middle baffle 722 are horizontally moved on the translation rail 724 to adjust the distance between them. In this way, the positions of the side baffles 721 and the middle baffle 722 are adjusted according to the width of the corrugated paper, thereby improving the adaptability of the device to corrugated paper of different specifications.

[0037] To sum up, the automatic rotary digital printing machine of this embodiment provides a sliding track for the printing carriage 3 through the crossbeam 4, and then realizes the rotation switching of the printing carriage 3 through the power shaft 31. Compared with the printing carriage 3 solution in the prior art, this can realize automatic rotation switching, and the switching is more stable and reliable.

[0038] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An automatic rotary digital printing machine, comprising a base (1), a suction unit (2) mounted on the base (1), a printing carriage (3) slidably mounted above the suction unit (2), and a front edge paper feeding device (7), wherein the front edge paper feeding device (7) is arranged above the position of the base (1) relative to the entrance end of the suction unit (2) to guide corrugated paper to enter above the suction unit (2), characterized in that: A crossbeam (4) is fixed on the base (1) and spans the air suction unit (2). A sliding base (5) is slidably provided on the lower side of the crossbeam (4). A power shaft (31) is fixed on the middle part of the upper side of the printing carriage (3). The power shaft (31) is rotatably mounted on the sliding base (5). A locking device (32) is also provided on the upper side of the printing carriage (3) to lock the printing carriage (3) at a rotation angle.

2. The automatic rotary digital printing machine according to claim 1, characterized in that: The printing carriage (3) comprises a housing (33), a nozzle array (34) mounted on the lower side of the housing (33), an ink cartridge (35) mounted in the housing (33), and a thermostat. The ink cartridge (35), the thermostat, and the nozzle array (34) are interconnected via a pipeline so that ink output from the ink cartridge (35) is heated and then sent to the nozzle array (34), so that the ink is output at a constant temperature.

3. The automatic rotary digital printing machine according to claim 1 or 2, characterized in that: The locking device (32) comprises a magnetic locking block (322) and two locking electromagnets (321), wherein the two locking electromagnets (321) are fixedly mounted on the upper side of the printing carriage (3), and the magnetic locking block (322) is fixedly mounted on the lower side of the sliding base (5), so that after the printing carriage (3) is rotated into position, one of the locking electromagnets (321) magnetically attracts the magnetic locking block (322) to lock the printing carriage (3) in place.

4. The automatic rotary digital printing machine according to any one of claims 1 to 3, characterized in that: A plurality of mounting rods (43) are fixed on the crossbeam (4), a mounting frame (11) is fixed on the base (1), and the ends of the plurality of mounting rods (43) are mounted on the mounting frame (11) in a movably movable manner to drive the crossbeam (4) to move up and down above the base (1).

5. The automatic rotary digital printing machine according to claim 4, characterized in that: A lifting angle steel (12) is installed on the side of the mounting frame (11) in a liftable manner, the end of the mounting rod (43) is fixed to the upper side of the lifting angle steel (12) by means of bolts, and a driving device (13) for driving the lifting angle steel (12) to move up and down is provided on the upper side of the mounting frame (11).

6. The automatic rotary digital printing machine according to claim 5, characterized in that: The driving device (13) comprises a driving motor (131) and a plurality of bevel gear elevators (132). The plurality of bevel gear elevators (132) are mounted one by one on the mounting frame (11) at positions relative to the lifting angle steel (12). The bevel gear elevators (132) have an input shaft and an output shaft. The input shaft is linked to the driving motor (131). The output shaft passes downward through the mounting frame (11) and is threadedly connected to the lifting angle steel (12).

7. The automatic rotary digital printing machine according to any one of claims 1 to 3, characterized in that: An ink stack (6) is fixedly mounted on one side of the base (1); an ink collection box (61) is disposed on one side of the ink stack (6); an ink suction device (62) is disposed at a position of the base (1) close to the ink collection box (61); the ink stack (6), the ink collection box (61) and the ink suction device (62) are connected via a pipeline so that ink beads on the lower side of the printing carriage (3) can be sucked into the ink collection box (61) via the ink stack (6).

8. The automatic rotary digital printing machine according to claim 7, characterized in that: The ink stack (6) comprises an ink stack base (63), a plurality of cleaning pads (64) and a plurality of ink extraction pads (65). The plurality of cleaning pads (64) are arranged in a row near the side of the ink stack base (63). The plurality of ink extraction pads (65) are arranged on the ink stack base (63) so as to provide the printing carriage (3) with moisture and ink absorption through the ink extraction pads (65). The cleaning pads (64) clean the ink beads remaining on the printing carriage (3) after ink absorption.

9. The automatic rotary digital printing machine according to any one of claims 1 to 3, characterized in that: The air suction unit (2) comprises a belt (21) and a bellows (22) arranged in the belt (21); the upper side of the bellows (22) is open; the belt (21) is provided with a plurality of through holes; an air duct (23) is provided in the bellows (22); one end of the air duct (23) extends to the inner wall of the bellows (22) and is then closed; the other end is connected to an external fan via an air duct adapter; two or more partitions (24) are provided in the bellows (22) to divide the inside of the bellows (22) into air suction grooves; ventilation holes are provided on the top surface and side surfaces of the air duct (23) in the air suction groove.

10. The automatic rotary digital printing machine according to any one of claims 1 to 3, characterized in that: The front edge paper feeding device (7) comprises a front edge base (71) and a front paper stopper assembly (72); the upper side surface of the front edge base (71) is rotatably provided with a plurality of rollers (73) for rolling and driving the corrugated paper into the suction unit (2); the front paper stopper assembly (72) is arranged at a position between the front edge base (71) and the suction unit (2) for intermittently blocking the corrugated paper so that the corrugated paper is fed into the suction unit (2) sheet by sheet.

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