Digital printing equipment and printing method thereof

Abstract

The invention discloses digital printing equipment and a printing method thereof, and relates to the technical field of printing device.The digital printing equipment comprises a machine table, a containing groove is formed in the middle of the machine table, an adjusting motor is fixedly installed at one end of the inner wall of the containing groove, and the output end of the adjusting motor is fixedly connected with a mounting frame; a direction adjusting motor is fixedly installed in the installation frame, the output end of the direction adjusting motor is fixedly connected with a spray head frame, a printing spray head is fixedly installed in the middle of the spray head frame, and a dust removal mechanism used for conducting dust removal and cleaning on a printing stock is fixedly installed on one side of the machine table. According to the printing device, the direction adjusting motor is arranged to drive the spray head frame to rotate, then the direction of the printing spray head is adjusted, the adjusting motor is matched to drive the mounting frame to rotate, the printing spray head can achieve the printing requirements of different faces and different angles of a printing stock, and the device has better use flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of printing equipment, in particular to a digital printing equipment and a printing method thereof. Background Art

[0002] When a digital printing machine prints printed materials, the pattern to be printed is first set. The operator adjusts the printing position of the pattern and the printed material according to the actual size of the printed material, and sets the print quantity. Then the substrate enters the printing machine from one end of the feeding port, and the inkjet device performs inkjet printing on the printed material according to the set program and pattern.

[0003] With the development of packaging technology, different types of packaging materials bring different printing needs, such as printing on different sides of the material or on inclined surfaces. However, the existing printing equipment, whose printing nozzles are mostly fixed, is difficult to meet the diverse printing needs, so it is necessary to propose improvements. Summary of the invention

[0004] The object of the present invention is to provide a digital printing device and a printing method thereof, so as to solve the problem that the prior art mentioned in the above background technology is difficult to meet the printing requirements of different positions of packaging materials.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A digital printing device comprises a machine platform, a storage slot is provided in the middle of the machine platform, an adjusting motor is fixedly installed at one end of the inner wall of the storage slot, an output end of the adjusting motor is fixedly connected to a mounting frame, an end of the mounting frame away from the adjusting motor is rotatably connected to the inner wall of the storage slot, an adjustment motor is fixedly installed inside the mounting frame, a nozzle rack is fixedly connected to the output end of the adjustment motor, a printing nozzle is fixedly installed in the middle of the nozzle rack, a dust removal mechanism for removing dust from a substrate is fixedly installed on one side of the machine platform, and a drying device for quickly drying the printed substrate is fixedly installed on the other side of the top of the machine platform.

[0007] As a further solution of the present invention: a nozzle cleaning mechanism for cleaning the printing nozzle is fixedly installed in the middle of the inner wall of the storage groove, and the nozzle cleaning mechanism includes a shell, a linear motor is fixedly installed inside the shell, the output end of the linear motor is fixedly connected to a docking cover, both ends of the inner wall of the docking cover are fixedly connected to water inlet pipes, one side of the two water inlet pipes is provided with a water outlet pipe, one end of the two water inlet pipes are connected through a water inlet three-way regulating valve, and the water inlet end of the water inlet three-way regulating valve is connected to an external water source through a connecting pipe, one end of the two water outlet pipes is connected through the water outlet three-way regulating valve, and the water outlet end of the water outlet three-way regulating valve is connected to the outside through a connecting pipe.

[0008] As a further solution of the present invention: a sweeping rod is rotatably connected to the inner middle of the docking cover, a sweeping pad is fixedly connected to the outer wall of the sweeping rod, and a cleaning motor for driving the sweeping rod to rotate is arranged at one end of the sweeping rod.

[0009] As a further solution of the present invention: a sealing gasket is fixedly connected to the inner wall edge of the docking cover, a docking groove is opened on the side wall of the printing nozzle, and the sealing gasket is arranged corresponding to the docking groove.

[0010] As a further solution of the present invention: a through groove is opened at the bottom of the inner wall of the storage groove, a conducting pipe is fixedly connected below the through groove, a hot air pipe is fixedly connected to one side of the conducting pipe, one end of the hot air pipe is fixedly connected to the output end of an external hot air device, and a guide block is fixedly connected to the inner wall of the conducting pipe, and one side of the guide block is inclined.

[0011] As a further solution of the present invention: the dust removal mechanism includes a supporting platform, and the side of the supporting platform close to the storage slot is set to an inclined surface, the top of the inclined surface is fixedly connected to a cleaning frame, and two cleaning rollers arranged up and down are rotatably installed inside the cleaning frame, a dust outlet is opened in the middle of the inclined surface, and a dust sweeping frame is set on one side of the dust outlet, and two dust sweeping rods arranged up and down are rotatably installed on the inner wall of the dust sweeping frame, and a plurality of dust sweeping contact pads are fixedly connected to the outer wall of the dust sweeping rod.

[0012] As a further solution of the present invention: a supporting net is fixedly installed on the inner wall of the dust outlet, a dust suction assembly is fixedly installed below the dust outlet, the dust suction assembly includes a dust hood plate, a guide fan is fixedly installed on one side of the dust hood plate, the guide fan is inclined toward the dust outlet, and the bottom of the dust hood plate is snap-connected with a dust collecting grid.

[0013] As a further solution of the present invention: a tensioning assembly is arranged on one side of the top of the supporting platform, and the tensioning assembly includes a lifting cylinder, and an output end of the lifting cylinder is fixedly connected with a movable plate, and a lifting frame is arranged above the movable plate, and a buffer spring is fixedly connected between the movable plate and the lifting frame, and a lifting roller is rotatably installed on the top of the lifting frame.

[0014] As a further solution of the present invention: a vibration cavity is opened inside the lifting frame, a vibration motor is fixedly installed inside the vibration cavity, a vibration block is fixedly connected to the output end of the vibration motor, and the vibration block is an eccentric cam eccentrically arranged with the output shaft of the vibration motor.

[0015] A printing method of a digital printing device comprises the following steps:

[0016] Step 1: The direction adjustment motor drives the nozzle frame to rotate so that the printing nozzle faces the substrate to be printed;

[0017] Step 2: The substrate is pulled to move by an external pulling device, and the cleaning roller and the dust-sweeping contact pad in the dust removal mechanism come into contact with the substrate to clean the substrate;

[0018] Step 3: The dust collecting component in the dust removal mechanism works, and the guide fan is started to attract and collect the cleaned dust and impurities;

[0019] Step 4: When the substrate passes through the printing nozzle, the printing nozzle sprays ink to complete the printing;

[0020] Step 5: Start the drying device to complete the drying of the printing ink.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes the adjustment of the direction of the printing nozzle by setting a direction adjustment motor to drive the nozzle frame to rotate, and cooperates with the adjustment motor to drive the mounting frame to rotate, so that the printing nozzle of the present application can realize the printing needs on different surfaces and different angles of the substrate, so that the device has better use flexibility;

[0022] The present invention provides a nozzle cleaning mechanism, uses a linear motor to drive the docking cover to move forward and dock with the printing nozzle, provides two water inlet pipes and two water outlet pipes, and changes the water inlet and outlet directions through a three-way regulating valve, so that the water flow in the docking cover can achieve reciprocating flushing motion, and cooperates with the cleaning motor to drive the sweeping pad to contact and perform friction sweeping on the printing nozzle, thereby achieving effective flushing and removal of the solidified ink on the nozzle and the attached dust and impurities;

[0023] The present invention adjusts the height of the lifting roller by means of a lifting cylinder, and utilizes the support of the lifting roller on the substrate to adjust the tension of the substrate; a vibration motor and other structures are arranged in combination to drive the lifting frame to vibrate, thereby driving the lifting roller and the substrate in contact therewith to vibrate, thereby facilitating the separation of dust and impurities thereon. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A perspective view of the present invention;

[0025] Figure 2 is a cross-sectional view of the nozzle cleaning mechanism of the present invention;

[0026] Figure 3 It is a schematic diagram of the position structure of the flow guide pipe of the present invention;

[0027] Figure 4 is a cross-sectional view of the dust collection assembly of the present invention;

[0028] Figure 5 is a cross-sectional view of the tensioning assembly of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the mounting frame of the present invention;

[0030] Figure 7 It is a schematic diagram of the state when the mounting frame of the present invention is lifted.

[0031] In the figure: 1, machine; 2, storage tank; 301, mounting frame; 302, adjustment motor; 303, direction adjustment motor; 4, nozzle frame; 5, printing nozzle; 6, nozzle cleaning mechanism; 601, housing; 602, linear motor; 603, docking cover; 604, sealing gasket; 605, water outlet pipe; 606, water inlet pipe; 607, cleaning motor; 608, sweeping rod; 701, conduction pipe; 702, guide block; 703, hot air pipe; 8, tensioning assembly; 80 1. Lifting frame; 802. Lifting roller; 803. Vibrating motor; 804. Vibrating block; 805. Movable plate; 806. Buffer spring; 807. Lifting cylinder; 9. Dust collection assembly; 901. Dust collection hood plate; 902. Guide fan; 903. Supporting net; 904. Dust outlet; 905. Dust collecting net frame; 10. Cleaning frame; 11. Cleaning roller; 12. Dust sweeping frame; 13. Dust sweeping rod; 14. Dust sweeping contact pad; 15. Supporting platform; 16. Drying device. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1 In an embodiment of the present invention, a digital printing device includes a machine platform 1, a storage slot 2 is provided in the middle of the machine platform 1, and an adjustment motor 302 is fixedly installed at one end of the inner wall of the storage slot 2. Figure 6The output end of the adjusting motor 302 is fixedly connected to the mounting bracket 301, and the end of the mounting bracket 301 is rotatably connected to the inner wall of the storage slot 2 at one side away from the adjusting motor 302. The interior of the mounting bracket 301 is fixedly installed with a direction adjustment motor 303, and the output end of the direction adjustment motor 303 is fixedly connected to the nozzle rack 4, and the middle of the nozzle rack 4 is fixedly installed with a printing nozzle 5; the present application realizes the adjustment of the direction of the printing nozzle 5 by setting the direction adjustment motor 303 to drive the nozzle rack 4 to rotate, and cooperates with the adjusting motor 302 to drive the mounting bracket 301 to rotate, so that the present invention The printing nozzle 5 of the application can realize the printing needs of different surfaces and different angles of the substrate; when it is necessary to print on the bottom surface of the substrate, the mounting frame 301 is kept in a flat storage state in the storage slot 2, and the nozzle frame 4 is driven by the adjustment motor 303 to rotate so that the printing nozzle 5 is upward; when the side of the substrate to be printed is its top surface, before the substrate is fed into the machine 1, the mounting frame 301 is driven by the adjustment motor 302 to rotate and lift, and the nozzle frame 4 is driven by the adjustment motor 303 to rotate so that the printing nozzle 5 is downward, please refer to Figure 7 , at this time, the substrate passes under the printing nozzle 5, and the printing nozzle 5 can print on the top surface of the substrate; and when the surface to be printed on the substrate is an inclined surface, the printing nozzle 5 is driven by the adjustment motor 303 to tilt it to be parallel to the surface to be printed before the substrate is fed into the machine 1, so as to print on the inclined surface of the substrate;

[0034] After long-term use, the solidified ink and attached dust and impurities on the print head 5 may easily cause the print head 5 to be blocked, so it is necessary to clean it. Please refer to Figure 2 In the present application, a nozzle cleaning mechanism 6 for cleaning the printing nozzle 5 is fixedly installed in the middle of the inner wall of the storage slot 2. The nozzle cleaning mechanism 6 includes a shell 601. A linear motor 602 is fixedly installed inside the shell 601. The output end of the linear motor 602 is fixedly connected to a docking cover 603. Both ends of the inner wall of the docking cover 603 are fixedly connected to water inlet pipes 606. One side of the two water inlet pipes 606 is provided with a water outlet pipe 605. The linear motor 602 drives the docking cover 603 to move forward and dock with the printing nozzle 5. Water is delivered through the water inlet pipe 606 and discharged from the water outlet pipe 605, so that the water in the docking cover 603 flows, thereby realizing the flushing and cleaning of the printing nozzle 5.

[0035] One end of the two water inlet pipes 606 is connected through a water inlet three-way regulating valve, and the water inlet end of the water inlet three-way regulating valve is connected to an external water source through a connecting pipe, one end of the two water outlet pipes 605 is connected through a water outlet three-way regulating valve, and the water outlet end of the water outlet three-way regulating valve is connected to the outside through a connecting pipe, by setting two water inlet pipes 606 and two water outlet pipes 605, and changing the inlet and outlet directions of water through a three-way regulating valve, the water flow in the docking cover 603 can realize a reciprocating flushing motion, thereby effectively improving the cleaning effect of the printing nozzle 5.

[0036] In order to further achieve effective cleaning of solidified ink and other impurities, a sweeping rod 608 is rotatably connected to the middle part of the interior of the docking cover 603, and a sweeping pad is fixedly connected to the outer wall of the sweeping rod 608. The sweeping pad is a water-absorbing sponge pad. A cleaning motor 607 is provided at one end of the sweeping rod 608 to drive the sweeping rod 608 to rotate. The sweeping pad is driven by the cleaning motor 607 to contact the printing nozzle 5 for friction sweeping to remove attached dirt.

[0037] In order to prevent water from spraying and escaping into the storage groove 2 during the cleaning process, the present application has a sealing gasket 604 fixedly connected to the inner wall edge of the docking cover 603, and a docking groove is opened on the side wall of the printing nozzle 5. The sealing gasket 604 is arranged corresponding to the docking groove. During cleaning, the docking cover 603 is docked with the printing nozzle 5, and the sealing gasket 604 is engaged with the docking groove.

[0038] See also Figure 3 A through groove is provided at the bottom of the inner wall of the storage tank 2, a conducting pipe 701 is fixedly connected to the bottom of the through groove, a hot air pipe 703 is fixedly connected to one side of the conducting pipe 701, one end of the hot air pipe 703 is fixedly connected to the output end of the external hot air device, a guide block 702 is fixedly connected to the inner wall of the conducting pipe 701, and one side of the guide block 702 is inclined; by setting the guide block 702, the water flow remaining in the storage tank 2 is discharged in real time, and the hot air pipe 703 is used to send hot air to the position of the printing nozzle 5, so as to assist in the rapid drying of the printing nozzle 5 after cleaning;

[0039] A dust removal mechanism for removing dust from substrates is fixedly installed on one side of the machine 1, and a drying device 16 for quickly drying printed substrates is fixedly installed on the other side of the top of the machine 1. The drying device 16 is implemented using existing technical means.

[0040] See also Figure 1 and Figure 4 The dust removal mechanism includes a supporting platform 15, and a side of the supporting platform 15 close to the storage groove 2 is set as an inclined surface, and a cleaning frame 10 is fixedly connected to the top of the inclined surface. Two cleaning rollers 11 arranged up and down are rotatably installed inside the cleaning frame 10. The dust and impurities on both sides of the substrate are cleaned by the rotation of the cleaning rollers 11. A dust outlet 904 is opened in the middle of the inclined surface, and a dust sweeping frame 12 is set on one side of the dust outlet 904. Two dust sweeping rods 13 arranged up and down are rotatably installed on the inner wall of the dust sweeping frame 12. The outer wall of the dust sweeping rod 13 is fixedly connected with a plurality of dust sweeping contact pads 14, and one end of the two dust sweeping rods 13 is fixedly connected with a locking bolt. The dust sweeping rod 13 is fixed by the locking bolt to ensure that the dust sweeping contact pad 14 is in stable contact with the substrate. The plurality of dust sweeping contact pads 14 have a variety of different sizes and shapes, so as to achieve stable contact and dust sweeping of different substrates.

[0041] A supporting net 903 is fixedly installed on the inner wall of the dust outlet 904 to prevent the printed material from falling into the dust outlet 904 under the influence of gravity, which would increase the friction resistance of transportation. The dust caused by the cleaning operation of the cleaning roller 11 can pass through the mesh and fall into the dust hood. A dust collection assembly 9 is fixedly installed below the dust outlet 904. The dust collection assembly 9 includes a dust hood plate 901. To facilitate the collection and discharge of dust and debris, a guide fan 902 is fixedly installed on one side of the dust hood plate 901. The guide fan 902 is tilted toward the dust outlet 904, and the bottom of the dust hood plate 901 is snap-connected with a dust collecting grid 905.

[0042] See also Figure 1 and Figure 5 In order to achieve tensioning of the printing substrate, a tensioning assembly 8 is arranged on one side of the top of the supporting platform 15, and the tensioning assembly 8 includes a lifting cylinder 807, and the output end of the lifting cylinder 807 is fixedly connected with a movable plate 805, and a lifting frame 801 is arranged above the movable plate 805, and a buffer spring 806 is fixedly connected between the movable plate 805 and the lifting frame 801, and a lifting roller 802 is rotatably installed on the top of the lifting frame 801, and the height of the lifting roller 802 is adjusted by the lifting cylinder 807, and the lifting roller 802 supports the printing substrate to achieve the adjustment of the tensioning degree of the printing substrate.

[0043] A vibration chamber is provided inside the lifting frame 801, and a vibration motor 803 is fixedly installed inside the vibration chamber. A vibration block 804 is fixedly connected to the output end of the vibration motor 803. The vibration block 804 is an eccentric cam eccentrically arranged with respect to the output shaft of the vibration motor 803. By arranging structures such as the vibration motor 803, the lifting frame 801 is driven to vibrate, and then the lifting roller 802 and the printing substrate in contact therewith are driven to vibrate, thereby facilitating the separation of dust and impurities thereon.

[0044] When the present invention is in use, the mounting frame 301 is first driven to move by the adjusting motor 302, and the nozzle frame 4 is driven to rotate in cooperation with the direction adjustment motor 303, so that the printing nozzle 5 faces the substrate to be printed; the substrate is pulled to move by an external traction device, and one end of the substrate passes through the two cleaning rollers 11 in sequence, and enters between the two dust sweeping rods 13 through the supporting net 903 and the dust outlet 904, and then passes through the storage slot 2 and the position where the printing nozzle 5 is located, and finally passes through the drying device 16 and is sent out;

[0045] When passing through the cleaning roller 11, the cleaning roller 11 rotates to rub and clean the substrate, and the dust attached to the substrate is sent out. Then, the dust-sweeping contact pad 14 contacts the substrate to clean the substrate, and the cleaned dust and impurities fall into the dust collection component 9 through the dust outlet 904; the guide fan 902 is started to generate a vacuum pressure at the dust removal port, and the cleaned dust and impurities are sucked into the dust collection cover plate 901, and are collected and temporarily stored by the dust collection grid 905; when the substrate passes through the printing nozzle 5, the printing nozzle 5 sprays ink to complete the printing; the printed substrate passes through the drying device 16 to complete the drying of the printing ink;

[0046] When the printing nozzle 5 needs to be cleaned, the adjusting motor 302 drives the mounting frame 301 to be stored and placed flat in the storage slot 2, and the adjusting motor 303 drives the nozzle frame 4 to rotate, so that the printing nozzle 5 faces the docking cover 603, and the linear motor 602 drives the docking cover 603 to dock with the printing nozzle 5, and the external water inlet pump delivers water to the water inlet pipe 606, and then discharges it from the water outlet pipe 605. At the same time, the cleaning motor 607 drives the sweeping rod 608 to rotate, and drives the sweeping pad to rotate to clean the nozzle. After the cleaning is completed and the excess water is discharged, the linear motor 602 drives the docking cover 603 to reset; then the external hot air equipment sends hot air to the guide pipe through the hot air pipe 703 to dry the printing nozzle 5 and the storage slot 2 for subsequent use.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A digital printing device, characterized in that: The invention comprises a machine platform (1), wherein a storage groove (2) is provided in the middle of the machine platform (1), an adjusting motor (302) is fixedly mounted on one end of the inner wall of the storage groove (2), an output end of the adjusting motor (302) is fixedly connected to a mounting frame (301), an adjusting motor (303) is fixedly mounted inside the mounting frame (301), an output end of the adjusting motor (303) is fixedly connected to a nozzle frame (4), a printing nozzle (5) is fixedly mounted in the middle of the nozzle frame (4), and a dust removal mechanism for removing dust from a printed material is fixedly mounted on one side of the machine platform (1).

2. A digital printing device according to claim 1, characterized in that: A nozzle cleaning mechanism (6) for cleaning a printing nozzle (5) is fixedly installed in the middle of the inner wall of the storage groove (2), and the nozzle cleaning mechanism (6) comprises a shell (601), a linear motor (602) is fixedly installed inside the shell (601), an output end of the linear motor (602) is fixedly connected to a docking cover (603), both ends of the inner wall of the docking cover (603) are fixedly connected to water inlet pipes (606), and one side of the two water inlet pipes (606) is provided with a water outlet pipe (605).

3. A digital printing device according to claim 2, characterized in that: A sweeping rod (608) is rotatably connected to the inner middle of the docking cover (603), a sweeping pad is fixedly connected to the outer wall of the sweeping rod (608), and a cleaning motor (607) is arranged at one end of the sweeping rod (608).

4. A digital printing device according to claim 2, characterized in that: A sealing gasket (604) is fixedly connected to the inner wall edge of the docking cover (603), a docking groove is provided on the side wall of the printing nozzle (5), and the sealing gasket (604) is arranged corresponding to the docking groove.

5. The digital printing device according to claim 2, characterized in that: A through groove is provided at the bottom of the inner wall of the storage groove (2); a conducting pipe (701) is fixedly connected below the through groove; a hot air pipe (703) is fixedly connected to one side of the conducting pipe (701); a guide block (702) is fixedly connected to the inner wall of the conducting pipe (701); and one side of the guide block (702) is arranged at an incline.

6. The digital printing device according to claim 1, characterized in that: The dust removal mechanism comprises a supporting platform (15), a side of the supporting platform (15) close to the storage groove (2) is arranged as an inclined surface, the top of the inclined surface is fixedly connected with a cleaning frame (10), a cleaning roller (11) is rotatably mounted inside the cleaning frame (10), a dust outlet (904) is opened in the middle of the inclined surface, a dust sweeping frame (12) is arranged on one side of the dust outlet (904), a dust sweeping rod (13) is rotatably mounted on the inner wall of the dust sweeping frame (12), and a plurality of dust sweeping contact pads (14) are fixedly connected to the outer wall of the dust sweeping rod (13).

7. A digital printing device according to claim 6, characterized in that: A supporting net (903) is fixedly mounted on the inner wall of the dust outlet (904), a dust collection assembly (9) is fixedly mounted below the dust outlet (904), the dust collection assembly (9) comprises a dust collection cover plate (901), a guide fan (902) is fixedly mounted on one side of the dust collection cover plate (901), and a dust collection grid frame (905) is snap-connected to the bottom of the dust collection cover plate (901).

8. The digital printing device according to claim 6, characterized in that: A tensioning assembly (8) is provided on one side of the top of the support platform (15), and the tensioning assembly (8) includes a lifting cylinder (807). The output end of the lifting cylinder (807) is fixedly connected to a movable plate (805), and a lifting frame (801) is provided above the movable plate (805). A buffer spring (806) is fixedly connected between the movable plate (805) and the lifting frame (801), and a lifting roller (802) is rotatably installed on the top of the lifting frame (801).

9. A digital printing device according to claim 8, characterized in that: A vibration cavity is provided inside the lifting frame (801), a vibration motor (803) is fixedly installed inside the vibration cavity, and a vibration block (804) is fixedly connected to the output end of the vibration motor (803).

10. A printing method of a digital printing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The nozzle frame (4) is driven to rotate by the direction adjustment motor so that the printing nozzle (5) faces the substrate to be printed; Step 2: The dust removal mechanism comes into contact with the substrate to clean the substrate; Step 3: The dust removal mechanism attracts and collects the dust impurities obtained by cleaning; Step 4: When the substrate passes through the printing nozzle (5), the printing nozzle (5) sprays ink to complete printing; Step 5: Dry the printing ink.

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