High-speed drum digital printing machine

Abstract

The invention relates to the technical field of drum printing machines, in particular to a high-speed drum digital printing machine which comprises a discharging mechanism and a printing mechanism, and the discharging mechanism comprises a discharging rack and a discharging roller installed in the discharging rack; the printing mechanism comprises guide rails fixed to the left side and the right side of the discharging rack and a printing cabin installed on the guide rails, each guide rail is composed of a first guide rail unit and a second guide rail unit, the first guide rail unit is fixed to the upper portion of the side of the discharging rack, and the second guide rail unit is fixed to the upper portion of the side of the discharging rack; the occupied space is saved after the second guide rail unit is folded upwards, the hanging plate is driven to deflect upwards when the second guide rail unit is folded upwards, the hanging plate drags the steel wire backwards, the door plate deflects upwards to the air opening to close the air cabin, the cooling roller of the air cabin and the cooling blade are sealed, and dust cannot be attached to the air cabin after the equipment is shut down. And dust on the blades is small, so that the blades are clean and tidy during blowing, and dust cannot be blown to the printing surface of paper.

Description

Technical Field

[0001] The invention relates to the technical field of web printing presses, and in particular to a high-speed web digital printing press. Background Art

[0002] The web printing press consists of front and rear side brackets, conveyor rollers installed on the side brackets, and a printing cabin located on the rear side bracket. The printing device is arranged in the printing cabin. In order to achieve better printing effect, a drying device, inking device, etc. are also required in the printing cabin. It is mainly used for ticket and advertisement printing, etc.

[0003] Since the printing cabin is close to the feeding side and some distance away from the discharging side, the overall equipment takes up a large space after installation. The discharging side lacks protection function, and dust will be caught when the paper is reeled in by the reeling device on the discharging side, affecting the color printing quality. Summary of the invention

[0004] In order to solve the above problems, the present invention provides the following technical solutions:

[0005] A high-speed web digital printing machine, comprising a discharging mechanism and a printing mechanism, wherein the discharging mechanism comprises a discharging frame and a discharging roller installed in the discharging frame, wherein the printing mechanism comprises guide rails fixed on the left and right sides of the discharging frame and a printing cabin installed on the guide rails, wherein the printing cabin is installed on the guide rails through tracks and can move forward and backward along the guide rails, wherein the guide rails are composed of a first guide rail unit and a second guide rail unit, wherein the first guide rail unit is fixed above the side of the discharging frame, the second guide rail unit is hinged at the rear end of the first guide rail unit, and the second guide rail unit exceeds the rear end of the discharging frame and moves toward the printing chamber. The printing chamber is extended rearward, and tracks on the same straight line are opened on the top surfaces of the first guide rail unit and the second guide rail unit. The bottom end of the printing chamber is slidably assembled in the tracks, and the discharging roller covers the bottom of the printing chamber. An air cabin is fixed on the inner side of the front end of the discharging frame, and an air outlet is arranged at the bottom of the air cabin. A cooling roller is installed in the air cabin, and cooling blades located in the air outlet are installed on the cooling roller. A door panel is hinged on the air outlet, and the door panel is connected to the second guide rail unit by a steel wire. When the second guide rail unit rotates upward, the steel wire is dragged backward, and the air outlet is closed by dragging the door panel by the steel wire.

[0006] Further preferably, a supporting frame is fixed on the discharging frame, the front end of the supporting frame is located on the bottom side of the first guide rail unit, and the rear end of the supporting frame extends to the bottom side of the second guide rail unit, and when the second guide rail unit is rotated downward to be in the same line with the first guide rail unit, the bottom surface of the second guide rail unit is supported on the top surface of the supporting frame.

[0007] Further preferably, a printing device is fixed in the printing cabin, and when the printing cabin moves forward and backward along the track on the guide rail, the printing device moves synchronously with it.

[0008] Further preferably, the cooling roller is connected to the discharging roller through a transmission mechanism, and the end of the cooling roller passes through the outside of the discharging mechanism, the transmission mechanism includes a driven pulley fixed on the end of the cooling roller, and also includes a driving pulley fixed on the end of the discharging roller, and also includes a conveyor belt connected to the driven pulley and the driving pulley, and the bottom side of the air cabin corresponds to at least two of the discharging rollers, the two discharging rollers correspond front to back, and the discharging roller on the front side is lower than the discharging roller on the rear side, at least two cooling rollers are installed in the air cabin, and the two cooling rollers are connected in the air cabin by gear transmission, and a row of cooling blades are installed on the two cooling rollers, and the extension direction of the cooling blades is toward the discharging roller on the front side.

[0009] Further preferably, a through hole is provided on the discharging frame, and the through hole is close to the door panel. A bent pipe is installed on the through hole, and the other end of the bent pipe enters into the discharging frame and bends toward the middle of the front side of the air cabin. A wire hole is provided on the middle of the front side of the air cabin, and a front-to-rear communicating passage is provided on the first guide rail unit. The steel wire passes through the passage, one end of the steel wire reaches the rear end of the first guide rail unit and is connected to the second guide rail unit, and the other end of the steel wire reaches the front end of the first guide rail unit, passes through the bent pipe through the through hole to reach the middle of the air cabin, and then enters the air cabin through the wire hole and is connected to the door panel.

[0010] Further preferably, an inclined hole is opened from the rear end of the second guide rail unit to the bottom surface, a hanging plate is fixed on the bottom surface of the second guide rail unit, the inclined hole is close to the hanging plate, and the connection between the steel wire and the rear end of the second guide rail unit is connected to the hanging plate.

[0011] Further preferably, a return spring is sleeved on the steel wire, a limit plate is fixed on the steel wire, one end of the return spring presses against the front end of the first guide rail unit, and the other end of the return spring presses against the limit plate.

[0012] Further preferably, the length of the printing cabin is less than or equal to the length of the first guide rail unit.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. A driving pulley is installed on one of the discharge rollers, and an air cabin is set in the frame. Rollers and blades are set in the air cabin. When the discharge roller transports the printed paper outward, it will also rotate with the driving pulley, and the driving pulley will rotate with the driven pulley through the conveyor belt. The driven pulley rotates with the cooling roller, and the cooling roller rotates with the cooling blades. The cooling blades generate airflow, which is collected in the air cabin and exhausted toward the discharge roller through the air outlet. The printed paper is discharged from the discharge roller, and the gas is blown onto the paper. Firstly, it helps the ink to dry quickly, and secondly, it prevents dust from falling on the paper, thereby improving product quality.

[0015] 2. The print cabin slides along the track to the first guide rail unit. At this time, the top pressure of the two second guide rail units disappears, and they are folded upward and lean on the rear side of the print cabin. At this time, not only the discharge roller and the air cabin are covered by the print cabin, but also the two second guide rail units save space after folding upward. When the second guide rail unit is folded upward, it deflects upward with the hanging plate, and the hanging plate drags the steel wire backward, and the steel wire drags the door panel, so that the door panel deflects upward to the air outlet to close the air cabin, and the air cabin cooling roller and cooling blades are sealed. After the equipment is shut down, no dust will adhere to the air cabin. When it is opened for use next time, there will be less dust on the blades, and they will be neat when blowing. When the blades are rotated for use next time, dust can be reduced from blowing directly onto the printing surface of the paper, affecting product quality. The air cabin achieves the purpose of automatically opening during use and automatically closing after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an embodiment of the present invention from a left front side perspective;

[0017] Figure 2 This is a schematic diagram of an embodiment of the present invention from a bottom-up perspective;

[0018] Figure 3 For the implementation mode of the present invention, Figure 2 The schematic diagram from the rear side perspective is drawn;

[0019] Figure 4 It is a schematic diagram of the printing cabin in the embodiment of the present invention moving forward and the second guide rail unit folding upward;

[0020] Figure 5 For the implementation mode of the present invention, Figure 4 The enlarged schematic diagram of the A part is shown;

[0021] Figure 6 For the implementation mode of the present invention, Figure 4 The schematic diagram from the rear side perspective is drawn;

[0022] Figure 7 For the implementation mode of the present invention, Figure 6 An enlarged schematic diagram of part B is shown.

[0023] In the figure: 1. discharge mechanism; 2. printing mechanism; 3. discharge frame; 4. discharge roller; 5. guide rail; 6. printing cabin; 7. first guide rail unit; 8. second guide rail unit; 9. track; 10. air cabin; 12. air outlet; 11. cooling roller; 13. cooling blade; 14. door panel; 15. steel wire; 16. carrier frame; 17. driven pulley; 18. driving pulley; 19. conveyor belt; 20. through hole; 21. channel; 22. limit plate; 23. bent pipe; 24. wire hole; 25. inclined hole; 26. hanging plate; 27. reset spring. DETAILED DESCRIPTION

[0024] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0025] In one embodiment, Figure 1-Figure 7 As shown: This embodiment provides a high-speed web digital printing machine, including a discharging mechanism 1 and a printing mechanism 2, the discharging mechanism 1 includes a discharging frame 3 and a discharging roller 4 installed in the discharging frame 3, the printing mechanism 2 includes a guide rail 5 fixed on the left and right sides of the discharging frame 3 and a printing cabin 6 installed on the guide rail 5, the printing cabin 6 is installed on the guide rail 5 through a track, and can move forward and backward along the guide rail 5, the guide rail 5 is composed of a first guide rail unit 7 and a second guide rail unit 8, the first guide rail unit 7 is fixed on the upper side of the discharging frame 3, the second guide rail unit 8 is hinged at the rear end of the first guide rail unit 7, the second guide rail unit 8 exceeds the rear end of the discharging frame 3 and extends backward The top surfaces of the first guide rail unit 7 and the second guide rail unit 8 are provided with tracks 9 in the same straight line, the bottom end of the printing cabin 6 is slidably assembled in the track 9, and the discharging roller 4 covers the bottom of the printing cabin 6, an air cabin 10 is fixed to the inner side of the front end of the discharging frame 3, an air outlet 12 is provided at the bottom of the air cabin 10, a cooling roller 11 is installed in the air cabin 10, a cooling blade 13 located in the air outlet 12 is installed on the cooling roller 11, a door panel 14 is hinged on the air outlet 12, and the door panel 14 is connected to the second guide rail unit 8 by a steel wire 15. When the second guide rail unit 8 rotates upward, the steel wire 15 is dragged backward, and the door panel 14 is dragged by the steel wire 15 to close the air outlet 12.

[0026] A supporting frame 16 is fixed on the discharging frame 3, the front end of the supporting frame 16 is located on the bottom side of the first guide rail unit 7, and the rear end of the supporting frame 16 extends to the bottom side of the second guide rail unit 8. When the second guide rail unit 8 rotates downward to be in the same line with the first guide rail unit 7, the bottom surface of the second guide rail unit 8 is supported on the top surface of the supporting frame 16.

[0027] The printing device is fixed in the printing cabin 6. When the printing cabin 6 moves forward and backward along the track 9 on the guide rail 5, it moves synchronously with the printing device.

[0028] The cooling roller 11 is connected to the discharge roller 4 through a transmission mechanism, and the end of the cooling roller 11 passes through the outside of the discharge mechanism 1. The transmission mechanism includes a driven pulley 17 fixed on the end of the cooling roller 11, and also includes a driving pulley 18 fixed on the end of the discharge roller 4, and also includes a conveyor belt 19 connected between the driven pulley 17 and the driving pulley 18. There are at least two discharge rollers 4 corresponding to the bottom side of the air cabin 10, and the two discharge rollers 4 correspond to each other front and back, and the front discharge roller 4 is lower than the rear discharge roller 4. At least two cooling rollers 11 are installed in the air cabin 10, and the two cooling rollers 11 are connected in the air cabin 10 through gear transmission. A row of cooling blades 13 are installed on the two cooling rollers 11, and the extension direction of the cooling blades 13 is toward the front discharge roller 4.

[0029] A through hole 20 is provided on the discharging frame 3, and the through hole 20 is close to the door panel 14. A bent pipe 23 is installed on the through hole 20. The other end of the bent pipe 23 enters the discharging frame 3 and bends toward the middle of the front side of the air cabin 10. A wire hole 24 is provided on the middle of the front side of the air cabin 10. A front-to-rear channel 21 is provided on the first guide rail unit 7. The steel wire 15 runs through the channel 21. One end of the steel wire 15 reaches the rear end of the first guide rail unit 7 and is connected to the second guide rail unit 8. The other end of the steel wire 15 reaches the front end of the first guide rail unit 7, passes through the bent pipe 23 through the through hole 20 to reach the middle of the air cabin 10, and then enters the air cabin 10 through the wire hole 24 and is connected to the door panel 14.

[0030] like Figure 7 As shown, an oblique hole 25 is opened from the rear end of the second guide rail unit 8 to the bottom surface, a hanging plate 26 is fixed on the bottom surface of the second guide rail unit 8, the oblique hole 25 is close to the hanging plate 26, and the connection between the steel wire 15 and the rear end of the second guide rail unit 8 is connected to the hanging plate 26. The second guide rail unit 8 can be folded upward to save the rear space. Moreover, when the second guide rail unit 8 is folded upward, the steel wire 15 will be dragged, and the door panel 14 will be rotated upward by the steel wire 15 to close the air cabin 10. Therefore, when the second guide rail unit 8 is folded upward, it not only saves space, but also uses its rotation mode to control the closing and opening of the air cabin 10.

[0031] A return spring 27 is sleeved on the steel wire 15 , and a limit plate 22 is fixed on the steel wire 15 . One end of the return spring 27 presses against the front end of the first guide rail unit 7 , and the other end of the return spring 27 presses against the limit plate 22 .

[0032] The length of the printing chamber 6 is less than or equal to the length of the first guide rail unit 7 .

[0033] Working principle and effect: First, the printing device in the roll-type printer (the prior art will not be described in detail) is installed in the printing cabin 6, the printing device such as the print head, the drying component, etc., the paper is fed from the feeding side ( Figure 1After feeding the material through the printing device, it is printed and then discharged from the material side ( Figure 1 The front side of the discharging roller 4 discharges the material, one of which is driven by the driving pulley 18 to rotate, and the driving pulley 18 rotates with the driven pulley 17 through the conveyor belt 19, and the driven pulley 17 rotates with the cooling roller 11 and the cooling roller 11 rotates with the cooling blade 13, and the cooling blade 13 generates airflow, which is collected by the air cabin 10 and exhausted toward the discharging roller 4 through the tuyere 12. At this time, the printed paper is discharged from the discharging roller 4, so the gas is blown onto the paper, which helps the ink to dry quickly and prevents dust from falling on the paper, thereby improving the product quality. In actual assembly, the paper winding device (an indispensable component of the printer, which is not described in detail in the prior art) is installed on the front side of the discharging roller 4 to wind the paper.

[0034] When performing the above printing, the printing cabin 6 with the printing device and the drying device is pressed Figure 1 The printing chamber 6 is slid on the second guide rail unit 8 as shown, covering the top of the feed roller on the feed side, which is equivalent to covering the feed roller inside, and at the same time providing a larger working space for the printing device and the drying device. When the printing work is completed, the discharge rollers 4 stop rotating, the cooling rollers 11 and the cooling blades 13 stop rotating to exhaust, and then the printing chamber 6 is dragged forward to make the printing chamber 6 slide along the track 9 to the first guide rail unit 7. At this time, the top pressure of the two second guide rail units 8 disappears, and the printing chamber 6 can be pressed. Figure 4The shape shown is folded upward and leans against the rear side of the print cabin 6. At this time, not only the discharge roller 4 and the air cabin 10 are covered by the print cabin 6, but also the two second guide rail units 8 save space after being folded upward. When the second guide rail unit 8 on the left is folded upward, it deflects upward with the hanging plate 26, and the steel wire 15 is dragged backward by the hanging plate 26, and the door panel 14 is dragged by the steel wire 15, so that the door panel 14 is deflected upward to the air outlet 12 to close the air cabin 10. At this time, the cooling roller 11 and the cooling blade 13 of the air cabin 10 are sealed. After the equipment is shut down, no dust will adhere to the air cabin 10. When it is opened for use next time, the dust on the blade 13 is small, and it is clean when blowing, and no dust will be blown onto the printing surface of the paper. When the steel wire 15 is dragged, the steel wire 15 will also move backward with the limit plate 12, and use the limit plate 12 to squeeze the return spring 27 to compress and shorten. The two second guide rail units 8 are connected to the rear end of the first guide rail unit 7 in a damping transfer manner, so that after they are folded upward, they can be positioned and have sufficient pulling force to close the door panel 14 on the air outlet 12. When used again, the second guide rail unit 8 is deflected downward, and the bottom surface of the second guide rail unit 8 falls on the support frame 16. After being supported by the support frame 16, it is ensured that the second guide rail unit 8 and the first guide rail unit 7 are at the same height, so that the tracks 9 on the top surfaces of the two are in the same straight line, and the return spring 2 7 releases the length forward and pushes the limit plate 12 forward, the steel wire 15 relaxes, the tension on the steel wire 15 disappears, and is not enough to drag the door panel 14. The door panel 14 automatically deflects downward under the action of its own weight, and the air chamber 10 opens, pushing the printing chamber 6 onto the second guide rail unit 8. The equipment is powered on, and the paper is fed and discharged again, and printing is completed again. One of the discharge rollers 4 rotates again with the active pulley 18, and the driven pulley 17 rotates again. The cooling roller 11 rotates again with the cooling blade 13, and blows air again at the ink surface (printing surface) on the discharge side of the paper to assist the ink in drying quickly and prevent dust from falling on the printing surface and affecting product quality.

[0035] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0036] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed web-to-web digital printing machine, characterized in that: The invention comprises a discharge mechanism (1) and a printing mechanism (2), wherein the discharge mechanism (1) comprises a discharge frame (3) and a discharge roller (4) installed in the discharge frame (3), and the printing mechanism (2) comprises guide rails (5) fixed on the left and right sides of the discharge frame (3) and a printing cabin (6) installed on the guide rails (5), wherein the printing cabin (6) is installed on the guide rails (5) via rails and can move forward and backward along the guide rails (5), and the guide rails (5) are composed of a first guide rail unit (7) and a second guide rail unit (8), wherein the first guide rail unit (7) is fixed above the side of the discharge frame (3), and the second guide rail unit (8) is hinged at the rear end of the first guide rail unit (7), and the second guide rail unit (8) exceeds the rear end of the discharge frame (3) and extends backward, and the first guide rail unit (7) and the second guide rail unit (8) are connected to each other. A track (9) is provided on the top surface of the second guide rail unit (8) and is arranged on the same straight line. The bottom end of the printing chamber (6) is slidably mounted in the track (9) and covers the discharge roller (4) on the bottom of the printing chamber (6). An air chamber (10) is fixed on the inner side of the front end of the discharge frame (3). An air outlet (12) is provided at the bottom of the air chamber (10). A cooling roller (11) is installed in the air chamber (10). A cooling blade (13) located in the air outlet (12) is installed on the cooling roller (11). A door panel (14) is hinged on the air outlet (12). The door panel (14) is connected to the second guide rail unit (8) by a steel wire (15). When the second guide rail unit (8) rotates upward, the steel wire (15) is dragged backward and the steel wire (15) drags the door panel (14) to close the air outlet (12).

2. The high-speed web-to-web digital printing machine according to claim 1, characterized in that: A support frame (16) is fixed on the discharging frame (3), the front end of the support frame (16) is located on the bottom side of the first guide rail unit (7), and the rear end of the support frame (16) extends to the bottom side of the second guide rail unit (8), and when the second guide rail unit (8) is rotated downward to be in the same straight line as the first guide rail unit (7), the bottom surface of the second guide rail unit (8) is supported on the top surface of the support frame (16).

3. The high-speed web-to-web digital printing machine according to claim 2, characterized in that: A printing device is fixed in the printing chamber (6), and when the printing chamber (6) moves forward and backward along the track (9) on the guide rail (5), it moves synchronously with the printing device.

4. The high-speed web-to-web digital printing machine according to claim 3, characterized in that: The cooling roller (11) is connected to the discharge roller (4) via a transmission mechanism, the end of the cooling roller (11) extends to the outside of the discharge mechanism (1), the transmission mechanism comprises a driven pulley (17) fixed to the end of the cooling roller (11), a driving pulley (18) fixed to the end of the discharge roller (4), and a conveyor belt (19) connected between the driven pulley (17) and the driving pulley (18), the bottom side of the air chamber (10) at least There are two corresponding discharge rollers (4), the two discharge rollers (4) correspond to each other front and back, and the discharge roller (4) on the front side is lower than the discharge roller (4) on the rear side. At least two cooling rollers (11) are installed in the air chamber (10), and the two cooling rollers (11) are connected by gear transmission in the air chamber (10). A row of cooling blades (13) are installed on the two cooling rollers (11), and the extension direction of the cooling blades (13) is toward the discharge roller (4) on the front side.

5. The high-speed web-to-web digital printing machine according to claim 4, characterized in that: The discharge frame (3) is provided with a through hole (20), the through hole (20) being close to the door panel (14), a curved pipe (23) being installed on the through hole (20), the other end of the curved pipe (23) entering into the discharge frame (3) and bending toward the middle of the front side of the air chamber (10), a wire hole (24) being provided in the middle of the front side of the air chamber (10), the first guide rail unit (7) being provided with a channel (21) communicating front and rear, the steel wire (15) passing through the channel (21), one end of the steel wire (15) reaching the rear end of the first guide rail unit (7) and being connected to the second guide rail unit (8), the other end of the steel wire (15) reaching the front end of the first guide rail unit (7), passing through the curved pipe (23) through the through hole (20) and reaching the middle of the air chamber (10), then entering into the air chamber (10) through the wire hole (24) and being connected to the door panel (14).

6. The high-speed web-to-web digital printing machine according to claim 5, characterized in that: An inclined hole (25) is opened from the rear end of the second guide rail unit (8) to the bottom surface, a hanging plate (26) is fixed to the bottom surface of the second guide rail unit (8), the inclined hole (25) is close to the hanging plate (26), and the connection point between the steel wire (15) and the rear end of the second guide rail unit (8) is connected to the hanging plate (26).

7. The high-speed web-to-web digital printing machine according to claim 6, characterized in that: A return spring (27) is sleeved on the steel wire (15), a limit plate (22) is fixed on the steel wire (15), one end of the return spring (27) presses against the front end of the first guide rail unit (7), and the other end of the return spring (27) presses against the limit plate (22).

8. The high-speed web-to-web digital printing machine according to claim 1, characterized in that: The length of the printing chamber (6) is less than or equal to the length of the first guide rail unit (7).

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