WO2024027091A1 - 一种具有外置烘干的喷墨印刷系统 - Google Patents

一种具有外置烘干的喷墨印刷系统 Download PDF

Info

Publication number
WO2024027091A1
WO2024027091A1 PCT/CN2022/142655 CN2022142655W WO2024027091A1 WO 2024027091 A1 WO2024027091 A1 WO 2024027091A1 CN 2022142655 W CN2022142655 W CN 2022142655W WO 2024027091 A1 WO2024027091 A1 WO 2024027091A1
Authority
WO
WIPO (PCT)
Prior art keywords
printing
roller
nozzle
printing medium
reference line
Prior art date
Application number
PCT/CN2022/142655
Other languages
English (en)
French (fr)
Inventor
汤振华
Original Assignee
广州精陶机电设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广州精陶机电设备有限公司 filed Critical 广州精陶机电设备有限公司
Publication of WO2024027091A1 publication Critical patent/WO2024027091A1/zh

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/316—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with tilting motion mechanisms relative to paper surface
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/15—Correlation function computation including computation of convolution operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J2025/008—Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum

Definitions

  • the present invention relates to the field of inkjet printing, and more specifically, to an inkjet printing system with external drying.
  • Inkjet printing is a contact-free, pressure-free, plate-less printing.
  • the principle of inkjet printing is that first the graphic and text information to be processed is input into the electronic computer. After editing and processing by the electronic color separation system, the stored graphic and text information is input into the inkjet printer; under the control of the electronic computer, the printing nozzle The nozzle sprays tiny mist-like ink droplets onto the surface of the printing medium.
  • the ink droplets are directly imaged on the surface of the printing medium based on the charge effect, realizing graphic and text printing.
  • the driving mechanism of the printing medium it can be divided into flatbed printers and roller printers. Roller printers have the advantages of fast printing speed and good color registration, and are gradually being used in large-volume commercial printing.
  • the general structure of a roller printer includes a roller, a linear moving platform and a printing nozzle assembly.
  • the roller is located below the linear moving platform and the printing nozzle assembly.
  • the surface of the roller winds and transports the printing medium;
  • the linear moving platform drives the printing nozzle assembly.
  • the print nozzle assembly includes a print nozzle array composed of multiple print nozzles and a nozzle tray for installing the print nozzle array; when the print media passes under the print nozzle assembly, the fixed
  • the print head assembly continuously ejects ink to complete graphic and text printing.
  • the inks used in inkjet printing are generally divided into oil-based inks, water-based inks and UV inks.
  • Oil-based ink is an ink that uses a non-water-soluble solvent as a dissolved color base.
  • Water-based ink is an ink that uses water and water-soluble solvents as a dissolved color base.
  • Oil-based ink or water-based ink is a solvent ink.
  • the ink is processed by a solvent on the printing medium. Penetration and evaporation attach pigments or dyes to the print media.
  • UV ink is an ink that uses ultraviolet light of different wavelengths and different energies to form a film and dry the ink droplets under ultraviolet irradiation.
  • roller printers that use water-based ink are subject to structural limitations. They usually only have a small built-in drying device. The drying device accelerates the drying process of the water-based ink to make up for the shortcomings of the printing speed of the roller printer. . Since the roller running speed of the roller printer and the ink ejection speed of the printing nozzle assembly are both relatively fast, the printing media that completes graphic and text printing can quickly pass through the drying device.
  • the effective drying time of the water-based ink on the printing medium is short, and the water-based ink is immediately transported to the next step before it is fully dried.
  • the printing surface of the printing medium is rubbed by external forces, causing part of the water-based ink on the surface to shift and spread, resulting in blurred images and text, seriously affecting the quality of inkjet printing.
  • the printing speed of roller printers increases, the printing format widens, the coverage of graphics and text increases, and the color of graphics and text deepens, the total amount of water-based ink per unit length of the printing medium increases, the lower the dryness of the water-based ink, the lower the color of graphics and text The blur is more severe.
  • the present invention aims to overcome at least one of the deficiencies of the above-mentioned prior art and provide an inkjet printing system with an external drying system to solve the problem of blurred images and text caused by rubbing of undried ink on the surface of the printing medium. problem to achieve the effect of improving the quality of graphic and text inkjet printing.
  • the technical solution adopted by the present invention is an inkjet printing system with external drying, which includes an unwinding device, a roller printing device, a first drying device and a rewinding device.
  • the printing medium is unrolled by the unwinding device.
  • Inkjet printing is carried out through the roller printing device, dried by the first drying device, and finally rolled into rolls by the winding device.
  • the printing medium enters and exits from the same side of the roller printing device; the first drying device is externally located on the same side of the printing medium entering and exiting the roller printing device.
  • the axial direction of the roller is the front and rear direction
  • the horizontal direction is the left and right direction
  • the vertical direction is the up and down direction.
  • the printing medium is wound on the roller of the roller printing device.
  • the printing medium enters and leaves from the same side of the roller.
  • the printing medium is tensioned and reversed by the roller itself, so the printing medium can be used without any need.
  • Under the conditions of reversing or supporting other devices it enters the first drying device set on the same side for drying. Therefore, when the printing surface of the printing medium is transported to the first drying device after inkjet printing, the undried ink on the surface can effectively avoid being rubbed by external forces.
  • the first drying device is provided independently from the roller printing device, and the first drying device does not need to be subject to the structural limitations of the roller printing device.
  • the first drying device can calculate the temperature and effective length it needs to provide drying based on the drying speed of the ink, the printing speed of the roller printing device, and the printing format.
  • the unrestricted external first drying device can ensure sufficient drying of the ink on the surface of the printing medium passing through it.
  • the first drying device can refer to relevant standard products in the prior art, and its internal structure does not contact the printing surface of the printing medium. Therefore, when the printing surface of the printing medium passes through the first drying device, the undried ink on the surface can be gradually and fully dried under non-contact conditions.
  • the printing medium of this solution enters and leaves from the same side of the roller printing device, and after inkjet printing, the printing medium is directly output to the first external drying device on the same side for full drying, thereby solving the problem of printing
  • the undried ink on the surface of the media is rubbed, causing the problem of blurred graphics and text, thereby improving the quality of graphics and text inkjet printing.
  • the printing media is stored in roll form.
  • the printing medium can be fed into the roller printing device for inkjet printing after being unrolled by the unwinding device. After the graphic and text printing is completed, it is rolled by the rewinding device.
  • the unwinding device and the rewinding device may refer to standard products in the prior art.
  • the unwinding device and the rewinding device realize the automatic input and output of the printing medium of the inkjet printing system.
  • the first drying device can adopt a modular design, and its length can be flexibly adjusted according to the drying time required for the ink.
  • the unwinding device includes a first sensor and/or a second sensor
  • the rewinding device includes a first sensor and/or a second sensor
  • the first sensor is used to measure the roll surface position of the printing medium.
  • the thickness of the web is obtained
  • the second sensor is used to obtain the deflection of the web by measuring the edge position of the printing medium.
  • the printing medium is placed in the form of a roll on the rotating shaft of the unwinding device or the rewinding device, and the first sensor is fixed at a position away from the rotating shaft.
  • the first sensor measures the roll surface position of the printing medium, that is, the distance between the outer surface of the roll material, and then calculates the difference to obtain the thickness of the roll material.
  • the first sensor is installed on the unwinding device, and the system can obtain the remaining amount of unprinted printing media for timely feeding and replenishment; the first sensor is installed on the rewinding device, and the system can obtain the inventory of printed printing media for timely replenishment. Timely cutting and packaging.
  • the printing medium being transported may be offset relative to the roll material on the rotating shaft.
  • the second sensor obtains the offset of the printing medium by measuring the position deviation of the edges of both sides of the printing medium being transported, and then obtains the offset of the roll material on the rotating shaft that needs to be adjusted to realize the deviation correction function of the system.
  • the unwinding device is equipped with a second sensor, so that unprinted printing media can be centrally input to the roller printing device; the winding device is equipped with a second sensor, so that the printed printing media can be neatly rolled.
  • the first drying device includes a box and a heater, a cross-flow fan and a drive roller arranged in the inner cavity of the box; the cross-flow fan and the drive roller are arranged opposite to each other up and down, and several drive rollers and several cross-flow fans are arranged along the box are arranged at intervals in the length direction; the printing medium passes through the gaps between several drive rollers and several cross-flow fans in sequence.
  • the box includes a horizontal section and an inclined section in sequence along the conveying direction of the printing medium, the ratio between the length of the inclined section and the length of the horizontal section is ⁇ 2, and the inclination angle of the inclined section is 25° to 30°.
  • the heater is used to heat the air in the enclosed space of the box.
  • the cross-flow fan and the transmission roller are positioned correspondingly, and the printing medium passes through the gap between the cross-flow fan and the transmission roller.
  • the number of drive rollers is greater than or equal to the number of cross-flow fans.
  • the inclined section of the box can reuse the hot air at the lower place and blow it to the printing medium at the higher place, thereby improving the heat energy utilization efficiency in the box and reducing the power of the first drying device.
  • the box also includes a heat exchange channel and a heat exchanger.
  • the heat exchanger is connected to the inner cavity of the box through a heat exchange channel.
  • the heat exchanger is used to adjust the temperature of the inner cavity of the box to maintain it within the optimal ink drying temperature range.
  • the rewinding device further includes a guide belt
  • the first drying device further includes a traction mechanism arranged in the inner cavity of the box; the guide belt is unrolled by the rewinding device, clamped by the traction mechanism and along the The printing medium is transported to the other side of the box in the opposite direction of the transport direction, and the guide belt passes through the gaps between a plurality of the transmission rollers and a plurality of the cross-flow fans in sequence.
  • the printing medium when printing for the first time, the printing medium is unrolled from the unwinding device and needs to pass through the roller printing device and the first drying device before being rolled into the rewinding device.
  • the length of the first drying device In order to match the high-speed printing of the roller printing device, the length of the first drying device is usually longer. Therefore, a longer section of the printing medium will be wasted and cannot be printed with inkjet.
  • the guide belt is arranged on the winding device, and the traction mechanism is arranged in the box of the first drying device.
  • the guide belt After the guide belt is unfolded, it is clamped and driven by the traction mechanism, moves in the opposite direction of the conveying direction of the printing medium, passes through several transmission rollers and several cross-flow fans in sequence, and finally reaches the input end of the first drying device.
  • the guide belt can then be further reversely wound around the roller printing device and connected to the unrolled printing medium at one end of the unwinding device.
  • a preheating device is provided between the unwinding device and the roller printing device, and the preheating device is used to preheat the passing printing medium.
  • the printing medium quickly passes through the first heating roller and the second heating roller on the roller printing device.
  • the effective heating time of the printing medium is too short and it is difficult to obtain sufficient heating.
  • the preheating device can effectively make up for the deficiency.
  • the preheating device, the first heating roller and the second heating roller jointly heat the printing medium in stages, so that the printing medium reaches an ideal working temperature.
  • the roller printing device includes a roller, a linear moving component and a printing nozzle assembly; the roller is used to wind and transport the printing medium; the linear moving component is used to drive the printing nozzle assembly and adjust the printing nozzle assembly and the roller The distance between the cylinder surfaces; the print head assembly is used for inkjet printing on print media.
  • the printing nozzle assembly includes a nozzle tray and a printing nozzle installed thereon.
  • the printing nozzles are arranged in several rows on the nozzle tray, and the printing nozzles on two adjacent rows are staggered and overlapped; the printing nozzle is installed obliquely relative to the nozzle tray; Several rows of printing nozzles are arranged around the surface of the roller, and the lower surfaces of the several rows of printing nozzles combine to form a concave inkjet surface. Each surface of the inkjet surface is tangent to the surface of the roller.
  • the specific numerical calculation of the tilt angle can be obtained through the following simplified relationship between the nozzle tray and the printing nozzle.
  • the nozzle tray has a first reference line, and the first reference line points to the center of the roller surface;
  • the nozzle hole of the printing nozzle has a second reference line, and the second reference line points to the ink ejection direction of the nozzle hole;
  • the first reference line The angle between the reference line and the second reference line is the deflection angle ⁇ , and the printing nozzle is installed tilted at the deflection angle ⁇ relative to the first reference line;
  • the calculation formula of the deflection angle ⁇ is: Among them, L is the distance from the nozzle hole to the first reference line; H is the height from the nozzle tray to the roller surface; ⁇ is the angle between the moving direction of the nozzle hole and the first reference line; R is the radius of the roller surface.
  • the roller printing device further includes a first heating roller, or a first heating roller and a second heating roller; the first heating roller is used to heat the printing surface of the printing medium; the second heating roller is used to heat the printing surface of the printing medium.
  • Inkjet printing is performed after the printing medium is heated, which is beneficial to the adhesion of the ink and the drying of the solvent, improves the color quality of graphics and text, and reduces subsequent drying requirements for the first drying device. Both sides of the printing medium are heated to prevent wrinkles and deformation caused by heat.
  • the roller printing device further includes a first UV curing component and a second UV curing component.
  • the first UV curing component and the second UV curing component are used for curing in stages the adhesive attached to the surface of the printing medium.
  • Ink several groups of first UV curing assemblies are respectively arranged on one side of the nozzle trays of several groups of printing nozzle assemblies; second UV curing assemblies are arranged away from the printing nozzle assemblies; the printing medium passes through several groups of printing nozzle assemblies, several groups of nozzle in turn.
  • a UV curing component and a second UV curing component are used for curing in stages the adhesive attached to the surface of the printing medium.
  • several groups of first UV curing assemblies are respectively arranged on one side of the nozzle trays of several groups of printing nozzle assemblies
  • second UV curing assemblies are arranged away from the printing nozzle assemblies
  • the printing medium passes through several groups of printing nozzle assemblies, several groups of nozzle in turn.
  • a UV curing component and a second UV curing component are used for curing in stages the adhesive
  • UV curing components need to be used to cure it.
  • Inkjet printing uses color separation and multiple printing, and the printing nozzle assembly is usually set up in multiple groups, and each group of printing nozzle assembly completes inkjet printing of one color.
  • the first UV curing assembly pre-cures its UV ink to prevent the undried UV inks of different colors from interfering with each other, resulting in the image The text is not clear.
  • the second UV curing component performs final and complete curing of the UV ink of all colors.
  • the roller printing device further includes an ionizing air rod, which is used to remove static electricity on the surface of the printing medium; the printing medium passes through the ionizing air rod and the printing nozzle assembly in sequence.
  • an ionizing air rod which is used to remove static electricity on the surface of the printing medium; the printing medium passes through the ionizing air rod and the printing nozzle assembly in sequence.
  • the roller printing device further includes a tension roller assembly, and the tension roller assembly is used to adjust the tension of the printing medium entering the roller printing device.
  • the tension roller can move up and down to tighten or loosen the print media wrapped around it.
  • the roller printing device further includes a second drying device, which is used to pre-dry the printing medium after inkjet printing.
  • the printing medium of this solution enters and leaves from the same side of the roller printing device, and after inkjet printing, the printing medium is directly output to the first external drying device on the same side for full drying, thereby solving the problem of printing
  • the undried ink on the surface of the media is rubbed, causing the problem of blurred graphics and text, thereby improving the quality of graphics and text inkjet printing.
  • Figure 1 is a floor plan view of Embodiment 1 of the present invention.
  • Figure 2 is a schematic diagram of the staggered and overlapping distribution of printing nozzles in Embodiment 2 of the present invention.
  • FIG. 3 is a schematic cross-sectional view of two rows of printing nozzles in Embodiment 2 of the present invention.
  • Figure 4 is a schematic cross-sectional view when three rows of printing nozzles are used in Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram for calculating the deflection angle ⁇ ( ⁇ 0) of a printing nozzle with a single row of nozzles in Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram for calculating the deflection angle ⁇ ( ⁇ 0) of a printing nozzle with multiple rows of nozzles in Embodiment 2 of the present invention.
  • Figure 8 is a cross-sectional view of the nozzle tray in Embodiment 2 of the present invention.
  • Figure 9 is a side view of Embodiment 2 of the present invention.
  • Figure 10 is a structural diagram from a first perspective in Embodiment 2 of the present invention.
  • Figure 11 is a structural diagram from a second perspective in Embodiment 2 of the present invention.
  • Figure 12 is a cross-sectional view of Embodiment 3 of the present invention.
  • Figure 13 is a schematic diagram of the connection between the printing medium and the guide belt in Embodiment 1 of the present invention.
  • roller printing device 100 roller printing device 100, unwinding device 200, first sensor 210, second sensor 220, first drying device 300, box 310, horizontal section 311, inclined section 312, cross flow fan 320, transmission roller 330.
  • reference numerals 2 printing nozzle assembly 110, nozzle tray 111, printing nozzle 112, nozzle hole 113, first mounting slot 114, second mounting slot 115, first reference line 121, second reference line 122, third reference line 123 , fourth reference line 124, roller 130, linear movement component 140, servo motor 141, screw nut 142, slider 143, guide rail 144, connecting plate 145, nozzle cleaning component 150, negative pressure suction nozzle 151, reciprocating drive mechanism 152.
  • this embodiment is an inkjet printing system with external drying, including an unwinding device 200, a roller printing device 100, a first drying device 300 and a rewinding device 500.
  • the printing medium is The unwinding device 200 unwinds, the roller printing device 100 performs inkjet printing, and then the first drying device 300 dries, and finally the winding device 500 rolls the film.
  • the printing medium enters and exits from the same side of the roller printing device 100; the first drying device 300 is externally located on the same side of the printing medium entering and exiting the roller printing device 100.
  • the axial direction of the roller is the front-to-back direction
  • the horizontal direction is the left-right direction
  • the vertical direction is the up-down direction
  • the printing medium is wound on the roller of the roller printing device 100, and the printing medium enters and leaves from the same side of the roller.
  • the printing medium is tensioned and reversed by the roller itself, so the printing medium can be printed on different surfaces.
  • the first drying device 300 provided on the same side is entered for drying. Therefore, when the printing surface of the printing medium is transported to the first drying device 300 after inkjet printing, the undried ink on the surface can effectively avoid being rubbed by external forces.
  • the first drying device 300 is provided independently of the roller printing device 100 , and the first drying device 300 does not need to be subject to the structural limitations of the roller printing device 100 .
  • the first drying device 300 can calculate the required drying temperature and effective length based on the drying speed of the ink, the printing speed of the roller printing device 100 and the printing format.
  • the unrestricted external first drying device 300 can ensure sufficient drying of the ink on the surface of the printing medium passing through its interior.
  • the first drying device 300 may refer to relevant standard products in the prior art, and its internal structure does not contact the printing surface of the printing medium. Therefore, when the printing surface of the printing medium passes through the first drying device 300, the undried ink on the surface can be gradually and fully dried under non-contact conditions.
  • the printing medium of this solution enters and leaves from the same side of the roller printing device, and after inkjet printing, the printing medium is directly output to the first external drying device on the same side for full drying, thereby solving the problem of printing
  • the undried ink on the surface of the media is rubbed, causing the problem of blurred graphics and text, thereby improving the quality of graphics and text inkjet printing.
  • the printing media is stored in roll form. After the printing medium is unrolled by the unwinding device 200, it can be input into the roller printing device 100 for inkjet printing. After the graphic and text printing is completed, the printing medium is rolled by the rewinding device 500.
  • the unwinding device 200 and the rewinding device 500 may refer to standard products in the prior art.
  • the unwinding device 200 and the rewinding device 500 realize the automatic input and output of the printing medium of the inkjet printing system.
  • the first drying device 300 can adopt a modular design, and its length can be flexibly adjusted according to the required drying time of the ink.
  • the winding device 500, the first drying device 300 and the unwinding device 200 are located on the left side of the roller printing device 100 in order from left to right.
  • the printing medium enters from the left side of the roller printing device 100. After completing the printing of graphics and text, it turns back and still leaves from the left side of the roller printing device 100.
  • the unwinding device 200 and the rewinding device 500 are driven by AC servo motors to match the rotation of the roller 130 to prevent the printing medium from being pulled.
  • the unwinding device 200 includes a first sensor 210 and/or a second sensor 220
  • the rewinding device 500 includes a first sensor 210 and/or a second sensor 220
  • the first sensor 210 is used to measure the The roll surface position of the printing medium is used to obtain the thickness of the roll material
  • the second sensor 220 is used to obtain the deflection of the roll material by measuring the edge position of the printing medium.
  • the printing medium is placed in the form of a roll on the rotating shaft of the unwinding device 200 or the rewinding device 500, and the first sensor 210 is fixed at a position away from the rotating shaft.
  • the first sensor 210 can obtain the thickness of the roll by measuring the position of the roll surface of the printing medium, that is, the distance between the outer surface of the roll and the print medium, and then calculating the difference.
  • the first sensor 210 is installed on the unwinding device 200, and the system can obtain the remaining amount of unprinted printing media for timely feeding and replenishment; the first sensor 210 is installed on the rewinding device 500, and the system can obtain the printed printing media. In order to ensure timely loading and unloading of materials.
  • the printing medium being conveyed and the roll material on the rotating shaft may be offset.
  • the second sensor 220 obtains the offset of the printing medium by measuring the position deviation of both edges of the printing medium being conveyed, and then obtains the offset of the roll material on the rotating shaft that needs to be adjusted to implement the system's correction function.
  • the unwinding device 200 is equipped with a second sensor 220 so that unprinted printing media can be centrally input to the roller printing device 100; the rewinding device 500 is equipped with a second sensor 220 so that the printed printing media can be rolled neatly.
  • the first sensor 210 is a Keyence distance sensor, which is installed below the unwinding device 200 and the rewinding device 500 respectively.
  • the second sensor 220 of the unwinding device 200 is installed at the input end of the roller printing device 100, and the second sensor 220 of the rewinding device 500 is installed at the input end thereof.
  • the first drying device 300 includes a box 310 and a heater, a cross-flow fan 320 and a transmission roller 330 disposed in the inner cavity of the box 310; the cross-flow fan 320 and the transmission roller 330 are arranged opposite to each other up and down, and several transmission rollers 330 and several cross-flow fans 320 are arranged at intervals along the length direction of the box 310; the printing medium passes through the gaps between several drive rollers 330 and several cross-flow fans 320 in sequence.
  • the box 310 includes a horizontal section 311 and an inclined section 312 in sequence along the conveying direction of the printing medium.
  • the ratio between the length of the inclined section 312 and the length of the horizontal section 311 is ⁇ 2.
  • the inclination angle of the inclined section 312 is 25° to 30°.
  • the heater is used to heat the air in the enclosed space of the box 310.
  • the cross-flow fan 320 and the transmission roller 330 are positioned correspondingly, and the printing medium passes through the gap between the cross-flow fan 320 and the transmission roller 330 .
  • the number of transmission rollers 330 is greater than or equal to the number of cross-flow fans 320 .
  • the cross-flow fan 320 is on the bottom and the transmission roller 330 is on the top.
  • the cross-flow fan 320 is on the top and the transmission roller 330 is on the bottom.
  • the cross-flow fan 320 continuously blows the hot air in the box 310 to the printing surface of the printing medium to dry the ink on the surface; the transmission roller 330 supports the back side of the printing medium to avoid deformation of the printing medium. Furthermore, after the hot air is blown toward the printing medium, it will rise and accumulate on the upper part of the box 310 .
  • the inclined section 312 of the box 310 can reuse the hot air at a lower place and blow it to the printing medium at a higher place, thereby improving the heat energy utilization efficiency in the box 310 and reducing the power of the first drying device 300 .
  • the box 310 also includes a heat exchange channel and a heat exchanger 340.
  • the heat exchanger 340 is connected to the inner cavity of the box 310 through a heat exchange channel.
  • the heat exchanger 340 is used to adjust the temperature of the inner cavity of the box 310 to maintain it within the optimal ink drying temperature range.
  • the cross-flow fan 320 corresponds to the transmission roller 330 one-to-one, and the number is the same.
  • the cross-flow fan 320 is at the bottom and the transmission roller 330 is at the top.
  • the heater is integrated on the cross flow fan 320.
  • the arrangement intervals of several cross-flow fans 320 and several transmission rollers 330 are 800 to 1000 mm.
  • the cross-flow fan 320 and/or the transmission roller 330 can be disassembled and taken out from the front and rear sides of the box 310 to facilitate routine maintenance.
  • the printing medium enters from the input end on the right side of the box 310 , passes through the gaps between several drive rollers 330 and several cross-flow fans 320 in order, and completes the drying process, and finally leaves from the output end on the left side of the box 310 .
  • the rewinding device 500 further includes a guide belt
  • the first drying device 300 further includes a traction mechanism 350 disposed in the inner cavity of its box 310; the guide belt is formed by the rewinding device
  • the device 500 is unfolded, clamped by the traction mechanism 350 and transported to the other side of the box 310 in the opposite direction to the transport direction of the printing medium. Pass through the gaps between the cross flow fans 320 .
  • the printing medium is unrolled from the unwinding device 200 and needs to pass through the roller printing device 100 and the first drying device 300 before being rolled into the winding device 500 .
  • the length of the first drying device 300 is usually longer. Therefore, a longer section of the printing medium will be wasted and cannot be printed with inkjet.
  • the guide belt is arranged on the winding device 500 , and the traction mechanism 350 is arranged in the box 310 of the first drying device 300 .
  • the guide belt After the guide belt is unfolded, it is clamped and driven by the traction mechanism 350 , moves in the opposite direction of the conveying direction of the printing medium, passes through several transmission rollers 330 and several cross-flow fans 320 in sequence, and finally reaches the input of the first drying device 300 end.
  • the guide tape can then be further reversely wound around the roller printing device 100 and connected to the unrolled printing medium at one end of the unwinding device 200 .
  • the guide tape may be pre-wound on the rotating shaft of the winding device 500, or may be individually rolled and arranged on one side of the rotating shaft.
  • the guide belt can be a single strip and the same width as the printing medium, or it can be two or more strips.
  • one end of the guide belt is fixed on the rotating shaft of the winding device 500, and the other end is connected to the printing medium.
  • the traction mechanism 350 can be a manipulator installed on the front and rear sides of the box 310 , and the manipulator can clamp the guide belt and move it along the conveying track of the printing medium.
  • the guide belt and the printing medium are connected on the right side of the first drying device 300 .
  • a preheating device 600 is provided between the unwinding device 200 and the roller printing device, and the preheating device 600 is used to preheat the passing printing medium.
  • the printing medium quickly passes through the first heating roller and the second heating roller on the roller printing device.
  • the effective heating time of the printing medium is too short and it is difficult to obtain sufficient heating.
  • the preheating device 600 can effectively make up for the shortcoming.
  • the preheating device 600, the first heating roller and the second heating roller jointly heat the printing medium in stages, so that the printing medium reaches an ideal working temperature.
  • the roller printing device 100 is also provided with a second drying device 400, which is used to pre-dry the printing medium after inkjet printing.
  • this embodiment is a printing nozzle assembly with a deflection angle, including a nozzle tray 111 and a printing nozzle 112 installed thereon.
  • the printing nozzles 112 are arranged in several rows on the nozzle tray 111. distributed, and the printing nozzles 112 on two adjacent rows are staggered and overlapped.
  • the printing nozzle 112 is installed obliquely relative to the nozzle tray 111; several rows of printing nozzles 112 are arranged around the surface of a roller, and the lower surfaces of the several rows of printing nozzles 112 are combined to form a concave inkjet surface. Each side of the inkjet surface is in contact with the roller. Surface tangent.
  • the length direction of the nozzle tray 111 is the front-to-back direction
  • the width direction is the left-right direction
  • the height direction is the up-down direction.
  • the ink ejection direction of the printing nozzle 112 is generally determined by taking the center position of the lower surface of the printing nozzle 112 as its normal direction.
  • Each row of printing nozzles 112 is installed tilted relative to the nozzle tray 111 , so the ink ejection direction of each row of printing nozzles 112 is tilted relative to a certain reference line of the nozzle tray 111 , and the ink ejection direction of each row of printing nozzles 112 has different tilt angles.
  • Several rows of print heads 112 surround the surface of the roller.
  • the lower surfaces of several rows of printing nozzles 112 are no longer a flat surface, but are combined into a concave ink-jet surface.
  • each surface of the inkjet surface is tangent to the roller surface.
  • the inkjet surface corresponds to part of the polygon circumscribing the roller surface.
  • the specific numerical calculation of the tilt angle can be obtained through the following simplified relationship between the nozzle tray 111 and the printing nozzle 112 .
  • the nozzle tray 111 has a first reference line 121, which points to the center of the roller surface;
  • the nozzle hole 113 of the printing nozzle 112 has a second reference line 122, which points to the nozzle hole.
  • the inkjet direction of 113; the angle between the first reference line 121 and the second reference line 122 is the deflection angle ⁇ , and the print head 112 is installed tilted with respect to the first reference line 121 at the deflection angle ⁇ ;
  • the calculation formula of the deflection angle ⁇ is: Among them, L is the distance from the nozzle hole to the first reference line; H is the height from the nozzle tray to the roller surface; ⁇ is the angle between the moving direction of the nozzle hole and the first reference line; R is the radius of the roller surface.
  • the first reference line 121 of the nozzle tray 111 is used as the reference line, and the first reference line 121 may be the center line of the nozzle tray 111 .
  • the ink ejection direction of each row of printing nozzles 112 can be ensured.
  • each row of printing nozzles 112 is perpendicular to the roller surface at the same time.
  • the second reference line 122 takes the center of the nozzle hole 113 of the printing nozzle 112 as a starting point and points to the ink ejection direction of the nozzle hole 113 .
  • the second reference line 122 is the ink ejection direction of the row of printing nozzles 112
  • the deflection angle ⁇ is the inclination angle of the row of printing nozzles 112 relative to the nozzle tray 111 .
  • the average deflection angle ⁇ of the multiple rows of nozzle holes 113 can be calculated or the deflection angle ⁇ of the middle position of the multiple rows of nozzle holes 113 can be calculated as the relative position of the row of printing nozzles 112 to the nozzle tray 111 Installation tilt angle.
  • the ink ejection directions of the multiple rows of nozzles 113 of the row of printing nozzles 112 are approximately perpendicular to the roller surface.
  • the height H from the nozzle tray to the roller surface changes within a certain range.
  • multiple deflection angles ⁇ can be calculated. Since the height H differs by several orders of magnitude from the radius R of the arc printing surface, the deflection angle ⁇ changes slightly. Within the allowable error range, the average value can be taken as the inclination of the row of printing nozzles 112 relative to the nozzle tray 111 . angle.
  • the height H from the nozzle tray to the roller surface is zero, the lower surface of the nozzle tray 111 and its imaginary extension surface are tangent to the roller surface; the height H from the nozzle tray to the roller surface is equivalent to the work of the printing nozzle 112 high.
  • the distance L from the nozzle hole to the first reference line should be the value when the height H from the nozzle tray to the roller surface is zero. Furthermore, when the height H of the nozzle tray 111 is adjusted, the nozzle tray 111 does not necessarily move along its first reference line 121 . When the angle ⁇ between the moving direction of the nozzle hole and the first reference line is formed on the outside of the roller surface, the angle ⁇ takes a negative value; when the angle ⁇ between the moving direction of the nozzle hole and the first reference line is formed on When the angle ⁇ is inside the roller surface, the angle ⁇ takes a positive value.
  • the ratio between the radius R of the roller surface and the distance L from the nozzle hole 113 to the first reference line 121 is: R/L ⁇ 10.
  • the distance L from the nozzle holes to the first reference line has a minimum value L MIN and a maximum value L MAX .
  • the distance L should be selected as L MAX ; further, R/(L MAX -L MIN ) ⁇ 20 needs to be satisfied.
  • the numerical value of the deflection angle ⁇ calculated for each row of nozzle holes 113 of a single printing nozzle 112 has a small difference, so that the average value of the deflection angle ⁇ of the multiple rows of nozzle holes 113 can be calculated or calculated
  • the deflection angle ⁇ at the middle position of the plurality of rows of nozzle holes 113 serves as the inclination angle at which the row of print heads 112 is installed relative to the head tray 111 .
  • the ink ejection directions of the multiple rows of nozzle holes 113 of the row of printing nozzles 112 are all approximately perpendicular to the roller surface.
  • the spacing between each row of nozzle holes 113 of a single printing nozzle 112 is correspondingly smaller, so the height of each row of nozzle holes 113 relative to the roller surface can be approximately equal, thereby reducing the roller surface.
  • the angle value between the moving direction of the nozzle tray 111 and the first reference line 121 is:
  • the included angle ⁇ will affect the actual distance from the nozzle hole 113 of the printing nozzle 112 to the first reference line 121 .
  • the included angle ⁇ takes a positive value, the included angle ⁇ will increase the actual distance from the nozzle hole 113 to the first reference line 121; when the included angle ⁇ takes a negative value, the included angle ⁇ will decrease the actual distance from the nozzle hole 113 to the first reference line 121. actual distance.
  • the value of the angle ⁇ increases, this influence will also become greater.
  • the value of the included angle ⁇ should not exceed 20°, and the value range of the included angle ⁇ is [-20°, 20°].
  • the deflection angle ⁇ ranges from 1° to 5°.
  • the deflection angle ⁇ is comprehensively affected by the distance L, height H, angle ⁇ and radius R.
  • the deflection angle ⁇ of the nozzle hole 113 of the printing nozzle 112 relative to the first reference line 121 is between 1° and 5°, the working height of the nozzle tray 111 and the distribution of the nozzle holes 113 of the printing nozzle 112 can be reduced to tilt the printing nozzle 112 The effect of angle.
  • any row of nozzles 113 on the printing nozzle 112 It can be regarded as perpendicular to the roller surface at any working height, and its inkjet direction points to the center of the roller surface.
  • the printing nozzle 112 is installed obliquely relative to the nozzle tray 111.
  • the connection method between the two includes: tilt angle follow-up, that is, the inclination angle of the printing nozzle 112 relative to the nozzle tray 111 can change according to the deflection angle under different circumstances.
  • the printing nozzle 112 is connected to the nozzle tray 111 through an automatic tilt angle adjustment device; the tilt angle is fixed, and the printing nozzle 112 is connected to the nozzle tray 111 through a manual tilt angle adjustment device (adjusting piece, adjustment fastener, etc.).
  • the tilt angle is fixed, and the nozzle tray 111 is provided with several installation slots, which are used to fix the printing nozzle 112; the center line of the installation slot is the third reference line 123, The third reference line 123 is inclined at a deflection angle ⁇ relative to the first reference line 121 .
  • the nozzle tray 111 is pre-processed with a mounting slot inclined at a deflection angle ⁇ , and the printing nozzle 112 is directly placed into the mounting slot, so that the printing nozzle 112 can be installed tilted at a deflection angle ⁇ relative to the first reference line 121.
  • the nozzle tray 111 is pre-processed with a mounting slot inclined at a deflection angle ⁇ , and the printing nozzle 112 is directly placed into the mounting slot, so that the printing nozzle 112 can be installed tilted at a deflection angle ⁇ relative to the first reference line 121.
  • the nozzle tray 111 is provided with several installation slots, which are used to fix the printing nozzle 112
  • the installation groove includes a first installation groove 114 and a second installation groove 115, which are symmetrically arranged along the first reference line 121.
  • the first installation groove 114 and the second installation groove 115 are symmetrically arranged along the first reference line 121.
  • the angle at which the lower surfaces of the groove 115 intersect is the installation angle ⁇ , and the installation angle
  • Two rows of printing nozzles 112 can be spliced into an array of printing nozzles 112 by overlapping and staggering. Therefore, two rows of mounting slots distributed in parallel are provided correspondingly.
  • the first mounting groove 114 and the second mounting groove 115 are symmetrically arranged along the first reference line 121 , which is beneficial to simplifying the processing and manufacturing of the nozzle tray 111 .
  • the lower surfaces of the first mounting groove 114 and the second mounting groove 115 are flush with the lower surfaces of the two rows of printing nozzles 112 respectively to avoid interference with the printing process of the printing nozzles 112. Therefore, the first mounting groove 114 and the second mounting groove 114 The lower surfaces of the two mounting grooves 115 are also combined to form a concave surface, which coincides with the ink ejection surface of the printing nozzle 112 .
  • the printing nozzles 112 and the mounting slots are in two rows, and are arranged symmetrically with respect to the first reference line 121 of the nozzle tray 111 .
  • a single printing nozzle 112 has four rows of nozzles 113, and its specific model is XAAR2001-GS12C.
  • the radius of the corresponding arc printing surface is 570 mm.
  • the width of the printing nozzle 112 is 50 mm.
  • the first mounting groove 114 and the second The installation angle ⁇ of the installation groove 115 is 174.88°.
  • the plurality of printing nozzles 112 are installed one by one in the first installation groove 114 and the second installation groove 115 through fasteners.
  • the printing nozzles 112 may be arranged in three rows, and the center line of the printing nozzles 112 in the middle row coincides with the first reference line 121 .
  • a nozzle cleaning assembly 150 is also included.
  • the nozzle cleaning assembly 150 is installed on the nozzle tray 111.
  • the nozzle cleaning assembly 150 includes a negative pressure suction nozzle 151 and a reciprocating drive mechanism 152; negative pressure
  • the suction nozzle 151 contacts the lower surface of the printing nozzle 112
  • the reciprocating drive mechanism 152 drives the negative pressure suction nozzle 151 to reciprocate along the length direction of the nozzle tray 111 .
  • the negative pressure suction nozzle 151 is located below the nozzle tray 111 , and the upper surface of the negative pressure suction nozzle 151 is the same as the ink ejection surface of the printing nozzle 112 and is in contact with each other.
  • the inside of the negative pressure suction nozzle 151 is connected to an external negative pressure device.
  • the upper surface of the negative pressure suction nozzle 151 has suction force.
  • the reciprocating driving mechanism 152 is installed on the nozzle tray 111 , and the reciprocating driving mechanism 152 drives the negative pressure suction nozzle 151 to reciprocate along the length direction of the nozzle tray 111 .
  • the negative pressure nozzle 151 stays at one end of the length direction of the nozzle tray 111 and does not affect the normal operation of the print nozzle 112; during cleaning, the reciprocating drive mechanism 152 pushes the negative pressure nozzle 151 to traverse all the print nozzles 112 in sequence, and the negative pressure nozzle 151
  • the suction nozzle 151 uses the suction force on the upper surface to clear and clean the nozzle holes 113 of the printing nozzle 112 .
  • this embodiment is a roller printing device 100 with a deflection angle.
  • the printing device includes a roller 130, a linear moving component 140, and a printing nozzle assembly 110 with a deflection angle in Embodiment 2; the roller 130 is used to wind and transport the printing medium; the linear moving component 140 is used to drive the printing nozzle assembly 110, Adjust the distance between the printing nozzle assembly 110 and the surface of the roller 130; the printing nozzle assembly 110 is used for inkjet printing on the printing medium.
  • the roller 130 is located below the linear moving assembly 140 and the printing nozzle assembly 110, and the vertical centerline of the roller 130 is the fourth reference line 124; the four sets of printing nozzle assemblies 110 are arranged from left to right.
  • the three groups of linear moving components 140 are spaced around the roller 130 in sequence and arranged symmetrically with respect to the fourth reference line 124; the three sets of linear moving components 140 are spaced around the roller 130 from left to right and are symmetrically arranged with respect to the fourth reference line 124; the printing on the left
  • the nozzle assembly 110 is fixedly connected to the linear moving assembly 140 on the left side, the printing nozzle assembly 110 on the right side is fixedly connected to the linear moving assembly 140 on the right side, and the two sets of printing nozzle assemblies 110 in the middle are fixedly connected to the linear moving assembly 140 in the middle at the same time. ;
  • Each group of linear moving components 140 independently drives the printing nozzle assembly 110 to adjust the distance between the printing nozzle assembly 110 and the surface of the roller 130.
  • the printing nozzle assembly 110 is provided with four groups, corresponding to the four colors of color printing (CMYK). Each group of printing nozzle assembly 110 is only responsible for printing one color, and the number of printing nozzles 112 on the nozzle tray 111 is small. (at least two rows are enough), which reduces the difficulty of processing and manufacturing the nozzle tray 111.
  • the left and right printing nozzle assemblies 110 are driven separately by the left and right linear moving components 140 respectively, so that the movement direction of the printing nozzle assembly 110 coincides with its first reference line 121, that is, the included angle ⁇ is zero. , thereby preventing the included angle ⁇ from affecting the printing nozzle 112 perpendicular to the surface of the roller 130 .
  • the two sets of print nozzle assemblies 110 in the middle are simultaneously driven by the linear moving assembly 140 in the middle, which can reduce the number of linear moving assemblies 140 and reduce the overall size of the printing device.
  • the angle ⁇ between the moving direction of the nozzle holes and the first reference line should be as small as possible.
  • Three sets of linear moving components 140 drive the printing nozzle assembly 110 to move, thereby adjusting the working height of the printing nozzle assembly 110 during printing to meet printing media of different thicknesses and printing requirements.
  • the print head assembly 110 adopts the structure in Embodiment 2, and the radius of the corresponding roller 130 is 570 mm.
  • the print head assembly 110 sequentially surrounds the roller 130 at intervals of 30°.
  • the angle between the first reference line 121 of the middle two sets of print head assemblies 110 and the fourth reference line 124 of the roller 130 is 15°.
  • the linear movement component 140 includes a servo motor 141, a screw nut 142, etc. for providing power, and a slider 143, a guide rail 144, a connecting plate 145, etc. for providing support.
  • the axis of the screw nut that is, the center line of the linear moving assembly 140 points to the center of the roller 130 .
  • Three groups of linear moving components 140 surround the roller 130 in sequence at 45° intervals, and the center line of the middle linear moving component 140 coincides with the fourth reference line 124 of the roller 130 .
  • the left and right print head assemblies 110 are respectively centrally mounted on the lower portions of the connecting plates 145 of the left and right linear movement assemblies 140 through fasteners, and the first reference line 121 of the nozzle tray 111 is in line with the linear movement.
  • the centerlines of components 140 coincide.
  • the middle two sets of printing nozzle assemblies 110 are simultaneously installed on the lower part of the connecting plate 145 of the middle linear moving assembly 140 through fasteners.
  • the first reference line 121 of the nozzle tray 111 and the center line of the linear moving assembly 140 form an included angle of 15°. .
  • the outer surface of the roller 130 is provided with a plurality of pores, and the inside of the roller 130 is connected to an external negative pressure device.
  • the roller 130 adsorbs the printing medium to its outer surface through the pores with negative pressure.
  • the axis end of the roller 130 is connected with a driving device (such as a motor).
  • a driving device such as a motor.
  • the roller printing device 100 further includes a first heating roller 161, or a first heating roller 161 and a second heating roller 162; the first heating roller 161 is used to heat the printing surface of the printing medium; the second heating roller 161 is used to heat the printing surface of the printing medium; The roller 162 is used to heat the back side of the printing medium; the printing medium is wound around the first heating roller 161 and the roller 130 in sequence, or the printing medium is wound around the second heating roller 162, the first heating roller 161 and the roller 130 in sequence.
  • Inkjet printing is performed after the printing medium is heated, which is beneficial to the adhesion of the ink and the drying of the solvent, improves the color quality of graphics and text, and reduces subsequent drying requirements for the first drying device 300 . Both sides of the printing medium are heated to prevent wrinkles and deformation caused by heat.
  • the roller printing device 100 further includes a first UV curing component 171 and a second UV curing component 172.
  • the first UV curing component 171 and the second UV curing component 172 are used for stepwise curing attached to the printing surface. Ink on the surface of the medium; several groups of first UV curing assemblies 171 are respectively disposed on one side of the nozzle tray 111 of several groups of the printing nozzle assemblies 110; the second UV curing assemblies 172 are disposed away from the printing nozzle assembly 110; the printing media are sequentially Passing through several sets of printing nozzle assemblies 110, several sets of first UV curing assemblies 171, and second UV curing assemblies 172.
  • UV curing components need to be used to cure it.
  • Inkjet printing uses color separation and multiple printing, and the printing nozzle assembly 110 is usually arranged in multiple groups, and each group of printing nozzle assemblies 110 completes inkjet printing of one color.
  • the first UV curing assembly 171 pre-cures its UV ink to prevent the undried UV inks of different colors from interfering with each other. This results in unclear images and text.
  • the second UV curing component 172 performs final and complete curing of all UV inks.
  • the roller printing device 100 further includes an ionizing air rod 180 , which is used to remove static electricity on the surface of the printing medium; the printing medium passes through the ionizing air rod 180 and the printing nozzle assembly 110 in sequence.
  • an ionizing air rod 180 which is used to remove static electricity on the surface of the printing medium; the printing medium passes through the ionizing air rod 180 and the printing nozzle assembly 110 in sequence.
  • the roller printing device 100 further includes a tension roller assembly 190 , which is used to adjust the tension of the printing medium entering the roller printing device 100 .
  • the tension roller can move up and down to tighten or loosen the print media wrapped around it.
  • the input end and the output end of the roller printing device 100 are located on the left side.
  • the printing medium enters from the lower left with the printing surface facing up, and exits from the lower left with the printing surface facing downward.
  • the tension roller assembly 190 is located on the far left side of the roller 130 .
  • the first heating roller 161 and the second heating roller 162 are located on the left side of the roller 130 and the right side of the tension roller.
  • the first heating roller 161 is located below the second heating roller 162 .
  • the ion air rod 180 is located on the left side of the roller 130 and above the second heating roller 162 .
  • the four sets of first UV curing assemblies 171 are respectively installed on the right sides of the nozzle trays 111 of the four sets of printing nozzle assemblies 110 , and the first UV curing assemblies 171 are all located above the roller 130 .
  • the second UV curing assembly 172 is installed on the right side of the roller 130 .
  • the second drying device 400 is installed on the lower right side of the roller 130 .
  • the transportation path of the printing medium is as follows: the printing medium enters from the left side of the roller 130 , is wound around the tension roller, the second heating roller 162 , and the first heating roller 161 in sequence, and then is wound around the roller 130 superior.
  • the printing medium passes through the ion air rod 180, the four sets of printing nozzle assemblies 110, and the corresponding four sets of the first UV curing assembly 171, the second UV curing assembly 172, and the second drying device 400 in sequence. After the printing medium is switched around the roller 130 , it leaves from the lower left side of the roller 130 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Computational Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Health & Medical Sciences (AREA)
  • Algebra (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Ink Jet (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

一种具有外置烘干装置的喷墨印刷系统，该系统包括放卷装置（200）、辊筒打印装置（100）、第一烘干装置（300）和收卷装置（500），打印介质由放卷装置进行展开，经辊筒打印装置进行喷墨印刷，再经第一烘干装置进行干燥，最后由收卷装置进行成卷；打印介质从辊筒打印装置的同一侧进入和离开，第一烘干装置外置于打印介质进出辊筒打印装置的同一侧。该系统解决了打印介质表面未干燥的墨水遭到磨蹭后导致图文模糊的问题，提升了图文喷墨印刷质量。

Description

一种具有外置烘干的喷墨印刷系统 技术领域
本发明涉及喷墨印刷领域，更具体地，涉及一种具有外置烘干的喷墨印刷系统。
背景技术
喷墨印刷是一种无接触、无压力、无印版的印刷。喷墨印刷的原理为，首先将要处理的图文信息输入到电子计算机中，经电子分色系统编辑处理后，存储的图文信息被输入喷墨打印机；在电子计算机的控制下，由打印喷头的喷嘴向打印介质的表面喷射雾状微小的墨滴，墨滴根据电荷效应在打印介质的表面直接成像，实现图文印刷。按照打印介质的驱动机构可分为平板式打印机和辊筒式打印机。辊筒式打印机具有打印速度快、颜色套准好等优点，被逐渐应用于大批量商业印刷。
辊筒式打印机一般结构包括辊筒、线性移动平台和打印喷头组件，辊筒位于线性移动平台和打印喷头组件的下方，辊筒的表面卷绕并输送打印介质；线性移动平台驱动打印喷头组件，调整打印喷头组件与打印介质之间的距离；打印喷头组件包括由多个打印喷头组成的打印喷头阵列和用于安装打印喷头阵列的喷头托盘；打印介质从打印喷头组件的下方通过时，固定的打印喷头组件持续喷墨完成图文印刷。
喷墨印刷采用的墨水一般分为油性墨水、水性墨水和UV墨水。油性墨水是以非水溶性的溶剂作为溶解色基的墨水，水性墨水是以水和水溶性的溶剂作为溶解色基的墨水，油性墨水或水性墨水为溶剂墨水，墨水在打印介质上经溶剂的渗透与蒸发而将颜料或染料附着在打印介质上。UV墨水是在紫外线照射下，利用不同波长和不同能量的紫外光使墨滴成膜和干燥的墨水。对于溶剂墨水，尤其是水性墨水而言，打印介质完成图文打印后，需要进行长时间的干燥才能使墨水充分地附着其表面。现有技术中，采用水性墨水的辊筒式打印机受制于结构限制，通常只能内置小型的烘干装置，通过烘干装置加速水性墨水的干燥过程，以弥补辊筒式打印机的打印速度短板。由于辊筒式打印机的辊筒运转速度和打印喷头组件的喷墨速度都较快，完成了图文印刷的打印介质快速地经过烘干装置。打印介质上的水性墨水获得的有效烘干时间较短，水性墨水未能得到充分干燥就被立即输送至下一环节。打印介质的打印面在 外力磨蹭下，使其表面的部分水性墨水偏移散开，导致图文模糊不清，严重影响喷墨印刷的质量。随着辊筒式打印机的打印速度提高、打印幅面加宽、图文覆盖率提高、图文颜色加深，打印介质单位长度上的水性墨水总量增加，则水性墨水的干燥程度越低，图文模糊情况越严重。
发明内容
本发明旨在克服上述现有技术至少一项的不足，提供一种具有外置烘干的喷墨印刷系统，用于解决打印介质表面未干燥的墨水遭到磨蹭后，导致其图文模糊的问题，达到提升图文喷墨印刷质量的效果。
本发明采取的技术方案是，一种具有外置烘干的喷墨印刷系统，包括放卷装置、辊筒打印装置、第一烘干装置和收卷装置，打印介质由放卷装置进行展开，经辊筒打印装置进行喷墨印刷，再经第一烘干装置进行干燥，最后由收卷装置进行成卷。打印介质从辊筒打印装置的同一侧进入和离开；第一烘干装置外置于打印介质进出辊筒打印装置的同一侧。
本方案中，以辊筒打印装置为基准，其辊筒的轴向为前后方向，水平方向为左右方向，竖直方向为上下方向。
本方案中，打印介质卷绕在辊筒打印装置的辊筒上，打印介质从辊筒的同一侧进入和离开，打印介质由辊筒本身进行张紧和换向，则打印介质可以在不需要其他装置进行换向或支撑的条件下，进入同侧设置的第一烘干装置进行干燥。因此，打印介质的打印面在经过喷墨印刷后输送至第一烘干装置的过程中，其表面的未干燥的墨水可以有效地避免遭到外力磨蹭。再者，第一烘干装置独立于辊筒打印装置设置，第一烘干装置不必受制于辊筒打印装置的结构限制。第一烘干装置可以根据墨水的干燥速度、辊筒打印装置的打印速度和打印幅面，计算得到其所需要提供干燥的温度和有效长度。无限制的外置的第一烘干装置可以保证充分地干燥通过其内部的打印介质表面上的墨水。第一烘干装置可参考现有技术中的相关标准产品，其内部结构不与打印介质的打印面接触。因此，打印介质的打印面在经过第一烘干装置的过程中，其表面的未干燥的墨水可以在非接触的条件下得到逐步且充分地干燥。本方案的打印介质从辊筒打印装置的同一侧进入和离开，且打印介质在喷墨印刷后，直接输出至外置于同一侧的第一烘干装置进行充分干燥，进而用于解决了打印介质表面未干燥的墨水遭到磨蹭后，导致其图文模糊的问题，达到提升图文喷墨印刷质量的效果。
本方案中，打印介质以卷料的型式存放。打印介质通过放卷装置展开后才能输入辊筒打印 装置进行喷墨印刷，完成图文印刷后则通过收卷装置进行成卷。放卷装置和收卷装置可参考现有技术中的标准产品。放卷装置和收卷装置实现了喷墨印刷系统的打印介质的自动化输入输出。再者，第一烘干装置可以采用模块化设计，其长度能根据墨水所需要的干燥时间进行灵活调整。
优选地，所述放卷装置包括第一传感器和/或第二传感器，所述收卷装置包括第一传感器和/或第二传感器；第一传感器用于通过测量所述打印介质的卷面位置获得卷料的厚度；第二传感器用于通过测量所述打印介质的边缘位置获得卷料的偏移。
本方案中，打印介质以卷料的型式放置在放卷装置或收卷装置的转轴上，第一传感器固定在远离转轴的某一位置上。第一传感器通过测量打印介质的卷面位置，即卷料的外表面与其之间的距离，再进行差值计算，即可获得卷料的厚度。第一传感器安装在放卷装置上，系统可以获得未印刷的打印介质的余量，以便及时上料补充；第一传感器安装在收卷装置上，系统可以获得印刷后的打印介质的存量，以便及时下料打包。再者，打印介质离开放卷装置后，或打印介质进入收卷装置前，输送中的打印介质相对于转轴上的卷料可能存在偏移的情况。第二传感器通过测量输送中的打印介质的两侧边缘的位置偏差，获得打印介质的偏移量，进而获得转轴上的卷料需要调整的偏移量，以实现系统的纠偏功能。放卷装置配置第二传感器，可以使未印刷的打印介质居中地输入至辊筒打印装置；收卷装置配置第二传感器，可以使印刷后的打印介质整齐地成卷。
优选地，所述第一烘干装置包括箱体以及设置在箱体内腔的加热器、横流风扇和传动辊；横流风扇与传动辊上下相对布置，若干条传动辊和若干台横流风扇沿箱体的长度方向间隔布置；所述打印介质依次从若干条传动辊与若干台横流风扇之间的缝隙中穿过。
进一步，所述箱体沿所述打印介质的输送方向依次包括水平段和倾斜段，倾斜段的长度与水平段的长度之间的比值≥2，倾斜段的倾斜角度为25°至30°。
本方案中，加热器用于加热箱体封闭空间内的空气。横流风扇和传动辊的位置相对应，打印介质从横流风扇与传动辊之间的缝隙中穿过。传动辊的数量大于等于横流风扇的数量。打印介质的打印面朝下时，横流风扇在下，传动辊在上；打印介质的打印面朝上时，横流风扇在上，传动辊在下。横流风扇不断地将箱体内的热风吹向打印介质的打印面，以干燥其表面的墨水；传动辊支撑打印介质的背面，以避免打印介质产生形变。再者，热风吹向打印介质后，会上升集聚在箱体的上部。倾斜段的箱体可以使较低处的热风被再次利用，吹向较高处的打印介质，提高箱体内的热能利用效率，降低第一烘干装置的功率。
进一步，箱体还包括换热通道和换热器。换热器通过换热通道与箱体内腔连通，换热器用于调节箱体内腔的温度，使之维持在最佳的墨水干燥温度范围内。
优选地，所述收卷装置还包括导引带，所述第一烘干装置还包括设置在其箱体内腔的牵引机构；导引带由收卷装置进行展开，经牵引机构夹持并沿所述打印介质的输送方向的反方向输送至箱体的另一侧，导引带依次从若干条所述传动辊与若干台所述横流风扇之间的缝隙中穿过。
本方案中，在初次打印时，打印介质从放卷装置展开，需要经过辊筒打印装置和第一烘干装置后才能成卷于收卷装置。而为了匹配辊筒打印装置的高速打印，第一烘干装置的长度通常较长。因此，打印介质将浪费较长的一段，无法喷墨印刷。另外，在没有牵引的状态下，需要打开第一烘干装置的箱体，手动将打印介质穿过第一烘干装置的内部结构，过程繁琐。设置廉价的导引带和牵引机构可以有效地解决上述问题。导引带设置在收卷装置上，牵引机构设置在第一烘干装置的箱体内。导引带展开后，由牵引机构夹持驱动，沿打印介质的输送方向的反方向运动，依次穿过若干条传动辊与若干台横流风扇，最后到达第一烘干装置的输入端。导引带后续可以进一步反向卷绕辊筒打印装置后，在放卷装置的一端，与展开的打印介质驳接。
可选地，所述放卷装置与辊筒打印装置之间还设有预加热装置，预加热装置用于对通过的打印介质进行预加热。高速打印时，打印介质快速经过辊筒打印装置上的第一加热辊和第二加热辊，打印介质的有效加热时间过短，难以得到足够的加热，而预加热装置则能有效弥补不足。预加热装置、第一加热辊和第二加热辊共同对打印介质进行分阶段加热，使打印介质达到理想的工作温度。
优选地，所述辊筒打印装置包括辊筒、线性移动组件和打印喷头组件；辊筒用于卷绕并输送所述打印介质；线性移动组件用于驱动打印喷头组件，调整打印喷头组件与辊筒表面之间的距离；打印喷头组件用于对打印介质进行喷墨印刷。所述打印喷头组件包括喷头托盘和安装在其上的打印喷头，打印喷头在喷头托盘上呈若干排并列分布，且相邻两排上的打印喷头交错重叠；打印喷头相对于喷头托盘倾斜安装；若干排打印喷头环绕辊筒表面布置，若干排打印喷头的下表面组合形成一个凹陷的喷墨表面，喷墨表面的每个面与辊筒表面相切。
对于倾斜角度的具体数值计算，可通过以下喷头托盘与打印喷头的简化关系获得。所述喷头托盘具有第一参考线，第一参考线指向所述辊筒表面的圆心；所述打印喷头的喷孔具有第二参考线，第二参考线指向喷孔的喷墨方向；第一参考线与第二参考线之间的夹角为偏转 角φ，打印喷头相对于第一参考线以偏转角φ倾斜安装；
所述偏转角φ的计算公式为：
Figure PCTCN2022142655-appb-000001
其中，L为喷孔至第一参考线的距离；H为喷头托盘至辊筒表面的高度；α为喷孔的移动方向与第一参考线的夹角；R为辊筒表面的半径。
优选地，所述辊筒打印装置还包括第一加热辊，或第一加热辊和第二加热辊；第一加热辊用于加热所述打印介质的打印面；第二加热辊用于加热所述打印介质的背面；打印介质依次卷绕第一加热辊、所述辊筒，或打印介质依次卷绕第二加热辊、第一加热辊、辊筒。打印介质加热后进行喷墨印刷，有利于墨水的附着和溶剂的干燥，提升图文的色彩质量和降低后续对第一烘干装置的干燥要求。打印介质的双面进行加热，可以避免其本身因受热产生褶皱形变。
可选地，所述辊筒打印装置还包括第一UV固化组件和第二UV固化组件，第一UV固化组件和第二UV固化组件用于分次固化附着在所述打印介质的表面上的墨水；若干组第一UV固化组件分别设置在若干组所述打印喷头组件的喷头托盘的一侧；第二UV固化组件远离打印喷头组件设置；打印介质依次经过若干组打印喷头组件、若干组第一UV固化组件、第二UV固化组件。
本方案中，针对UV墨水，则需要采用UV固化组件对其进行固化。喷墨印刷采用分色多次印刷，则打印喷头组件通常设置为多组，每组打印喷头组件完成一种颜色的喷墨印刷。打印介质依次通过多组打印喷头组件时，每完成一种颜色的喷墨印刷，第一UV固化组件对其UV墨水进行预固化，以防止未干燥的不同颜色的UV墨水产生相互干扰，导致图文不清晰。打印介质完成所有颜色的喷墨印刷后，第二UV固化组件对所有颜色的UV墨水进行最终的完全的固化。
优选地，所述辊筒打印装置还包括离子风棒，离子风棒用于去除所述打印介质的表面上的静电；打印介质依次经过离子风棒和所述打印喷头组件。
优选地，所述辊筒打印装置还包括张紧辊组件，张紧辊组件用于调节打印介质进入辊筒打印装置的张紧力。张紧辊可以上下运动，以拉紧或放松卷绕在其上的打印介质。
可选地，所述辊筒打印装置还包括第二烘干装置，第二烘干装置用于对完成喷墨印刷后的打印介质进行预烘干。
与现有技术相比，本发明的有益效果为：
本方案的打印介质从辊筒打印装置的同一侧进入和离开，且打印介质在喷墨印刷后，直接输出至外置于同一侧的第一烘干装置进行充分干燥，进而用于解决了打印介质表面未干燥的墨水遭到磨蹭后，导致其图文模糊的问题，达到提升图文喷墨印刷质量的效果。
附图说明
图1为本发明实施例1的平面布置图。
图2为本发明实施例2中打印喷头交错重叠分布的示意图。
图3为本发明实施例2中采用两排打印喷头时的截面示意图。
图4为本发明实施例2中采用三排打印喷头时的截面示意图。
图5为本发明实施例2中单列喷孔的打印喷头的偏转角φ(α＝0)的计算示意图。
图6为本发明实施例2中单列喷孔的打印喷头的偏转角φ(α≠0)的计算示意图。
图7为本发明实施例2中多列喷孔的打印喷头的偏转角φ(α≠0)的计算示意图。
图8为本发明实施例2中喷头托盘的截面剖视图。
图9为本发明实施例2的侧视图。
图10为本发明实施例2中第一视角的结构图。
图11为本发明实施例2中第二视角的结构图。
图12为本发明实施例3的截面剖视图。
图13为本发明实施例1中打印介质与导引带驳接的示意图。
标号说明1：辊筒打印装置100、放卷装置200、第一传感器210、第二传感器220、第一烘干装置300、箱体310、水平段311、倾斜段312、横流风扇320、传动辊330、换热器340、牵引机构350、第二烘干装置400、收卷装置500、预加热装置600。
标号说明2：打印喷头组件110、喷头托盘111、打印喷头112、喷孔113、第一安装槽114、第二安装槽115、第一参考线121、第二参考线122、第三参考线123、第四参考线124、辊筒130、线性移动组件140、伺服电机141、丝杠螺母142、滑块143、导轨144、连接板145、喷头清洗组件150、负压吸嘴151、往复驱动机构152、第一加热辊161、第二加热辊162、第一UV固化组件171、第二UV固化组件172、离子风棒180、张紧辊组件190。
具体实施方式
本发明附图仅用于示例性说明，不能理解为对本发明的限制。为了更好说明以下实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对于本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。
实施例1
如图1所示，本实施例为一种具有外置烘干的喷墨印刷系统，包括放卷装置200、辊筒打印装置100、第一烘干装置300和收卷装置500，打印介质由放卷装置200进行展开，经辊筒打印装置100进行喷墨印刷，再经第一烘干装置300进行干燥，最后由收卷装置500进行成卷。打印介质从辊筒打印装置100的同一侧进入和离开；第一烘干装置300外置于打印介质进出辊筒打印装置100的同一侧。
本方案中，以辊筒打印装置100为基准，其辊筒的轴向为前后方向，水平方向为左右方向，竖直方向为上下方向。
本方案中，打印介质卷绕在辊筒打印装置100的辊筒上，打印介质从辊筒的同一侧进入和离开，打印介质由辊筒本身进行张紧和换向，则打印介质可以在不需要其他装置进行换向或支撑的条件下，进入同侧设置的第一烘干装置300进行干燥。因此，打印介质的打印面在经过喷墨印刷后输送至第一烘干装置300的过程中，其表面的未干燥的墨水可以有效地避免遭到外力磨蹭。再者，第一烘干装置300独立于辊筒打印装置100设置，第一烘干装置300不必受制于辊筒打印装置100的结构限制。第一烘干装置300可以根据墨水的干燥速度、辊筒打印装置100的打印速度和打印幅面，计算得到其所需要提供干燥的温度和有效长度。无限制的外置的第一烘干装置300可以保证充分地干燥通过其内部的打印介质表面上的墨水。第一烘干装置300可参考现有技术中的相关标准产品，其内部结构不与打印介质的打印面接触。因此，打印介质的打印面在经过第一烘干装置300的过程中，其表面的未干燥的墨水可以在非接触的条件下得到逐步且充分地干燥。本方案的打印介质从辊筒打印装置的同一侧进入和离开，且打印介质在喷墨印刷后，直接输出至外置于同一侧的第一烘干装置进行充分干燥，进而用于解决了打印介质表面未干燥的墨水遭到磨蹭后，导致其图文模糊的问题，达到提升图文喷墨印刷质量的效果。
本方案中，打印介质以卷料的型式存放。打印介质通过放卷装置200展开后才能输入辊筒打印装置100进行喷墨印刷，完成图文印刷后则通过收卷装置500进行成卷。放卷装置200 和收卷装置500可参考现有技术中的标准产品。放卷装置200和收卷装置500实现了喷墨印刷系统的打印介质的自动化输入输出。再者，第一烘干装置300可以采用模块化设计，其长度能根据墨水所需要的干燥时间进行灵活调整。
本实施例中，收卷装置500、第一烘干装置300和放卷装置200从左往右依次位于辊筒打印装置100的左侧。打印介质从辊筒打印装置100的左侧进入，完成图文印刷后，往回折返，依旧从辊筒打印装置100的左侧离开。放卷装置200和收卷装置500采用交流伺服电机驱动，以匹配辊筒130的转动，避免打印介质受到拉扯。
优选地，所述放卷装置200包括第一传感器210和/或第二传感器220，所述收卷装置500包括第一传感器210和/或第二传感器220；第一传感器210用于通过测量所述打印介质的卷面位置获得卷料的厚度；第二传感器220用于通过测量所述打印介质的边缘位置获得卷料的偏移。
本方案中，打印介质以卷料的型式放置在放卷装置200或收卷装置500的转轴上，第一传感器210固定在远离转轴的某一位置上。第一传感器210通过测量打印介质的卷面位置，即卷料的外表面与其之间的距离，再进行差值计算，即可获得卷料的厚度。第一传感器210安装在放卷装置200上，系统可以获得未印刷的打印介质的余量，以便及时上料补充；第一传感器210安装在收卷装置500上，系统可以获得印刷后的打印介质的存量，以便及时下料打包。再者，打印介质离开放卷装置200后，或打印介质进入收卷装置500前，输送中的打印介质与转轴上的卷料可能存在偏移的情况。第二传感器220通过测量输送中的打印介质的两侧边缘的位置偏差，获得打印介质的偏移量，进而获得转轴上卷料需要调整的偏移量，以实现系统的纠偏功能。放卷装置200配置第二传感器220，可以使未印刷的打印介质居中地输入至辊筒打印装置100；收卷装置500配置第二传感器220，可以使印刷后的打印介质整齐地成卷。
本实施例中，第一传感器210为基恩士距离传感器，分别安装于放卷装置200和收卷装置500的下方。放卷装置200的第二传感器220安装在辊筒打印装置100的输入端，收卷装置500的第二传感器220则安装在其输入端。
优选地，所述第一烘干装置300包括箱体310以及设置在箱体310内腔的加热器、横流风扇320和传动辊330；横流风扇320与传动辊330上下相对布置，若干条传动辊330和若干台横流风扇320沿箱体310的长度方向间隔布置；所述打印介质依次从若干条传动辊330与若干台横流风扇320之间的缝隙中穿过。
进一步，所述箱体310沿所述打印介质的输送方向依次包括水平段311和倾斜段312，倾斜段312的长度与水平段311的长度之间的比值≥2，倾斜段312的倾斜角度为25°至30°。
本方案中，加热器用于加热箱体310封闭空间内的空气。横流风扇320和传动辊330的位置相对应，打印介质从横流风扇320与传动辊330之间的缝隙中穿过。传动辊330的数量大于等于横流风扇320的数量。打印介质的打印面朝下时，横流风扇320在下，传动辊330在上；打印介质的打印面朝上时，横流风扇320在上，传动辊330在下。横流风扇320不断地将箱体310内的热风吹向打印介质的打印面，以干燥其表面的墨水；传动辊330支撑打印介质的背面，以避免打印介质产生形变。再者，热风吹向打印介质后，会上升集聚在箱体310的上部。倾斜段312的箱体310可以使较低处的热风被再次利用，吹向较高处的打印介质，提高箱体310内的热能利用效率，降低第一烘干装置300的功率。
进一步，箱体310还包括换热通道和换热器340。换热器340通过换热通道与箱体310内腔连通，换热器340用于调节箱体310内腔的温度，使之维持在最佳的墨水干燥温度范围内。
本实施例中，横流风扇320与传动辊330一一对应，数量相同，横流风扇320在下，传动辊330在上。加热器集成在横流风扇320上。若干台横流风扇320和若干条传动辊330的布置间隔为800至1000mm。横流风扇320和/或传动辊330可以从箱体310的前后侧拆卸取出，以方便日常维护。打印介质从箱体310右侧的输入端进入，依次从若干条传动辊330与若干台横流风扇320之间的缝隙中穿过，并实现干燥过程，最后从箱体310左侧的输出端离开。
如图13所示，优选地，所述收卷装置500还包括导引带，所述第一烘干装置300还包括设置在其箱体310内腔的牵引机构350；导引带由收卷装置500进行展开，经牵引机构350夹持并沿所述打印介质的输送方向的反方向输送至箱体310的另一侧，导引带依次从若干条所述传动辊330与若干台所述横流风扇320之间的缝隙中穿过。
本方案中，在初次打印时，打印介质从放卷装置200展开，需要经过辊筒打印装置100和第一烘干装置300后才能成卷于收卷装置500。而为了匹配辊筒打印装置100的高速打印，第一烘干装置300的长度通常较长。因此，打印介质将浪费较长的一段，无法喷墨印刷。另外，在没有牵引的状态下，需要打开第一烘干装置300的箱体310，手动将打印介质穿过第一烘干装置300的内部结构，过程繁琐。设置廉价的导引带和牵引机构350可以有效地解决上述问题。导引带设置在收卷装置500上，牵引机构350设置在第一烘干装置300的箱体310 内。导引带展开后，由牵引机构350夹持驱动，沿打印介质的输送方向的反方向运动，依次穿过若干条传动辊330与若干台横流风扇320，最后到达第一烘干装置300的输入端。导引带后续可以进一步反向卷绕辊筒打印装置100后，在放卷装置200的一端，与展开的打印介质驳接。
本实施例中，导引带可以预先卷绕在收卷装置500的转轴上，或单独成卷并列在转轴的一侧。导引带可以为单条且与打印介质同宽，也可以为两台或多条。使用时，导引带的一端固定在收卷装置500的转轴上，另一端与打印介质驳接。牵引机构350可以为安装在箱体310前后侧上的机械手，机械手可以夹持导引带沿打印介质的输送轨迹运动。导引带与打印介质在第一烘干装置300的右侧驳接。
优选地，所述放卷装置200与辊筒打印装置之间还设有预加热装置600，预加热装置600用于对通过的打印介质进行预加热。高速打印时，打印介质快速经过辊筒打印装置上的第一加热辊和第二加热辊，打印介质的有效加热时间过短，难以得到足够的加热，而预加热装置600则能有效弥补不足。预加热装置600、第一加热辊和第二加热辊共同对打印介质进行分阶段加热，使打印介质达到理想的工作温度。
可选地，所述辊筒打印装置100上还设有第二烘干装置400，第二烘干装置400用于对完成喷墨印刷后的打印介质进行预干燥。
实施例2
如图2、3、4所示，本实施例为一种具有偏转角的打印喷头组件，包括喷头托盘111和安装在其上的打印喷头112，打印喷头112在喷头托盘111上呈若干排并列分布，且相邻两排上的打印喷头112交错重叠。打印喷头112相对于喷头托盘111倾斜安装；若干排打印喷头112环绕一辊筒表面布置，若干排打印喷头112的下表面组合形成一个凹陷的喷墨表面，喷墨表面的每个面与辊筒表面相切。
本方案中，以喷头托盘111的长度方向为前后方向，其宽度方向为左右方向，其高度方向为上下方向。打印喷头112的喷墨方向一般以打印喷头112下表面的中心位置取其法线方向。每排打印喷头112相对于喷头托盘111倾斜安装，则每排打印喷头112的喷墨方向相对于喷头托盘111的某一基准线倾斜，每排打印喷头112的喷墨方向具有不同的倾斜角度。若干排打印喷头112环绕在辊筒表面的上方。若干排打印喷头112的下表面不再为一个平面，而组合为一个凹陷的喷墨表面。当喷头托盘111带动打印喷头112靠近辊筒表面，打印喷头112的下表面与辊筒表面的距离为零时，喷墨表面的每个面与辊筒表面相切。喷墨表面相当于 辊筒表面的外切多边形的一部分。本方案通过将每排打印喷头相对于喷头托盘以不同的倾斜角度进行安装，使打印喷头的喷墨方向可以指向辊筒表面的圆心，进而解决多排交错重叠的打印喷头无法同时垂直于辊筒表面的问题，达到提升打印喷头组件整体打印质量的效果。
如图5至7所示，对于倾斜角度的具体数值计算，可通过以下喷头托盘111与打印喷头112的简化关系获得。所述喷头托盘111具有第一参考线121，第一参考线121指向所述辊筒表面的圆心；所述打印喷头112的喷孔113具有第二参考线122，第二参考线122指向喷孔113的喷墨方向；第一参考线121与第二参考线122之间的夹角为偏转角φ，打印喷头112相对于第一参考线121以偏转角φ倾斜安装；
所述偏转角φ的计算公式为：
Figure PCTCN2022142655-appb-000002
其中，L为喷孔至第一参考线的距离；H为喷头托盘至辊筒表面的高度；α为喷孔的移动方向与第一参考线的夹角；R为辊筒表面的半径。
本方案中，以喷头托盘111的第一参考线121作为基准线，第一参考线121可以为喷头托盘111的中心线。打印喷头112相对于喷头托盘111的第一参考线121以偏转角φ倾斜安装后，只要第一参考线121指向所述辊筒表面的圆心，即可保证每排打印喷头112的喷墨方向指向辊筒表面的圆心，每排打印喷头112同时垂直于辊筒表面。第二参考线122以打印喷头112的喷孔113的中心为起点，指向喷孔113的喷墨方向。当单个打印喷头112的喷孔113为单列时，第二参考线122即为该排打印喷头112的喷墨方向，偏转角φ即为该排打印喷头112相对于喷头托盘111安装的倾斜角度。当单个打印喷头112的喷孔113为多列时，每列喷孔113均具有一条第二参考线122，则计算得到多个偏转角φ。由于多列喷孔113的间距较短，可计算多列喷孔113的偏转角φ的平均值或计算多列喷孔113的中间位置的偏转角φ作为该排打印喷头112相对于喷头托盘111安装的倾斜角度。在误差允许的范围内，该排打印喷头112的多列喷孔113的喷墨方向均近似垂直于辊筒表面。
本方案中，喷头托盘至辊筒表面的高度H在一定范围内变化，对于每排打印喷头112而言，又可计算得到多个偏转角φ。由于高度H与弧面打印面的半径R相差多个数量级，因此偏转角φ的变化幅度微小，在误差允许的范围内，可取其平均值作为该排打印喷头112相对于喷头托盘111安装的倾斜角度。喷头托盘至辊筒表面的高度H为零时，喷头托盘111的下表面及其假想的延伸面与所述辊筒表面相切；喷头托盘至辊筒表面的高度H相当于打印喷头112的工作高度。喷孔至第一参考线的距离L应当取喷头托盘至辊筒表面的高度H为零时的 数值。再者，喷头托盘111在调整其高度H时，喷头托盘111并不一定沿其第一参考线121移动。当喷孔的移动方向与第一参考线的夹角α形成于所述辊筒表面的外侧时，夹角α取负值；当喷孔的移动方向与第一参考线的夹角α形成于所述辊筒表面的内侧时，夹角α取正值。
优选地，所述辊筒表面的半径R与所述喷孔113至所述第一参考线121的距离L之间的比值，即：R/L≥10。对于具有多列喷孔113的打印喷头112而言，喷孔至第一参考线的距离L有最小值L MIN和最大值L MAX。R-L比值计算时，距离L应当选择L MAX；进一步，还需要满足R/(L MAX-L MIN)≥20。一方面，R-L比值相差一个数量级时，单个打印喷头112的每列喷孔113计算得到的偏转角φ数值相差较小，这样才可以通过计算多列喷孔113的偏转角φ的平均值或计算多列喷孔113的中间位置的偏转角φ作为该排打印喷头112相对于喷头托盘111安装的倾斜角度。进而在误差允许的范围内，使该排打印喷头112的多列喷孔113的喷墨方向均近似垂直于辊筒表面。另一方面，R-L比值相差一个数量级时，单个打印喷头112的每列喷孔113的间距也相应较小，则每列喷孔113相对于辊筒表面的高度才能近似相等，进而减少辊筒表面的曲率对打印喷头112喷绘质量的影响。
优选地，所述喷头托盘111的移动方向与所述第一参考线121的夹角数值，即：|α|≤20°。喷头托盘111位于不同的高度H时，夹角α将影响打印喷头112的喷孔113至第一参考线121的实际距离。当夹角α取正值时，夹角α将增加喷孔113至第一参考线121的实际距离；当夹角α取负值时，夹角α将减少喷孔113至第一参考线121的实际距离。随着夹角α的数值增大，这种影响也将越大。在实际应用中，夹角α的数值不应超过20°，夹角α的取值范围为[-20°，20°]。
优选地，所述偏转角φ的范围为1°至5°。根据上述偏转角φ的计算公式，偏转角φ受到距离L、高度H、夹角α和半径R的综合影响。打印喷头112的喷孔113相对于第一参考线121的偏转角φ位于1°至5°时，可以降低喷头托盘111的工作高度和打印喷头112的喷孔113分布情况对打印喷头112选择倾斜角度的影响。例如，对于具有多列喷孔113的打印喷头112而言，当打印喷头112相对于喷头托盘111以3°倾斜安装时，在2°的误差范围内，打印喷头112上任意列的喷孔113在任意工作高度均可视为垂直于辊筒表面，其喷墨方向指向辊筒表面的圆心。
本方案中，打印喷头112相对于喷头托盘111倾斜安装，两者的连接方式包括：倾斜角度随动，即打印喷头112相对于喷头托盘111的倾斜角度可跟随偏转角在不同情况下变化而 变化，打印喷头112通过倾斜角度自动调整装置与喷头托盘111之间连接；倾斜角度固定，打印喷头112通过倾斜角度手动调整装置(调节片、调节紧固件等)与喷头托盘111之间连接。
如图8至11所示，优选地，倾斜角度固定，所述喷头托盘111设有若干个安装槽，安装槽用于固定所述打印喷头112；安装槽的中心线为第三参考线123，第三参考线123相对于所述第一参考线121以偏转角φ倾斜。喷头托盘111上预先加工以偏转角φ倾斜的安装槽，打印喷头112直接放入安装槽，即可实现打印喷头112相对于第一参考线121以偏转角φ倾斜安装，相比于逐个打印喷头112通过调节片或调节紧固件与喷托托盘连接的方式，极大地提高了打印喷头112倾斜安装的安装效率和安装精度。
进一步，所述安装槽包括第一安装槽114和第二安装槽115，第一安装槽114和第二安装槽115沿所述第一参考线121对称设置，第一安装槽114和第二安装槽115的下表面相交的夹角为安装夹角θ，安装夹角
Figure PCTCN2022142655-appb-000003
两排打印喷头112交错重叠即可拼接为打印喷头112阵列，因而对应设置两排并列分布的安装槽。第一安装槽114和第二安装槽115沿第一参考线121对称设置的方式，有利于简化喷头托盘111的加工制造。进一步，第一安装槽114和第二安装槽115的下表面分别与两排打印喷头112的下表面平齐，以避免对打印喷头112的喷绘过程产生干涉影响，因而第一安装槽114和第二安装槽115的下表面也组合形成一凹陷的表面，该表面与打印喷头112的所述喷墨表面重合。
本实施例中，打印喷头112和安装槽均为两排，并相对于喷头托盘111的第一参考线121对称布置。单个打印喷头112具有四列喷孔113，具体型号为XAAR2001-GS12C。打印喷头112相对于喷头托盘111的第一参考线121以偏转角φ＝2.56°倾斜安装，对应弧面打印面的半径为570mm，打印喷头112的宽度为50mm，第一安装槽114与第二安装槽115的安装夹角θ＝174.88°。多个打印喷头112通过紧固件逐一安装在第一安装槽114和第二安装槽115中。此外，在另一些实施例中，打印喷头112可并列设置为三排，中间排的打印喷头112的中心线与第一参考线121重合。
如图9至11所示，可选地，还包括喷头清洗组件150，喷头清洗组件150安装在所述喷头托盘111上，喷头清洗组件150包括负压吸嘴151和往复驱动机构152；负压吸嘴151抵触所述打印喷头112的下表面，往复驱动机构152带动负压吸嘴151沿喷头托盘111的长度方向往复运动。
本方案中，负压吸嘴151位于喷头托盘111的下方，负压吸嘴151的上表面与打印喷头112的喷墨表面相同，且相互接触。负压吸嘴151的内部与外置的负压装置连通，负压装置工作时，负压吸嘴151的上表面具有吸力。往复驱动机构152安装在喷头托盘111上，往复驱动机构152带动负压吸嘴151沿喷头托盘111的长度方向往复运动。正常打印时，负压吸嘴151停留在喷头托盘111长度方向上的一端，不影响打印喷头112的正常工作；清洗时，往复驱动机构152推动负压吸嘴151依次遍历所有打印喷头112，负压吸嘴151通过上表面的吸力疏通并清洁打印喷头112的喷孔113。本方案通过喷头清洗组件150的设置，在进行打印喷头112清洁时，就不需要进行打印喷头组件的拆卸，且整个清洁过程自动化进行，工作效率极大提高。
实施例3
如图12所示，本实施例为一种具有偏转角的辊筒打印装置100。该打印装置包括辊筒130、线性移动组件140以及实施例2中具有偏转角的打印喷头组件110；辊筒130用于卷绕并输送打印介质；线性移动组件140用于驱动打印喷头组件110，调整打印喷头组件110与辊筒130表面之间的距离；打印喷头组件110用于对打印介质进行喷墨印刷。
优选地，所述辊筒130位于所述线性移动组件140和所述打印喷头组件110的下方，辊筒130的竖直中心线为第四参考线124；四组打印喷头组件110从左往右依次间隔环绕辊筒130，并相对于第四参考线124对称布置；三组线性移动组件140从左往右依次间隔环绕辊筒130，并相对于第四参考线124对称布置；左侧的打印喷头组件110与左侧的线性移动组件140固定连接，右侧的打印喷头组件110与右侧的线性移动组件140固定连接，中间的两组打印喷头组件110同时与中间的线性移动组件140固定连接；每组线性移动组件140独立驱动打印喷头组件110，调整打印喷头组件110与辊筒130表面之间的距离。
本方案中，打印喷头组件110设有四组，分别对应彩色印刷的四分色(CMYK)，每组打印喷头组件110仅负责喷绘一种颜色，其喷头托盘111上的打印喷头112数量较少(最低两排即可)，降低了喷头托盘111的加工制造难度。另外，左侧和右侧的打印喷头组件110分别由左侧和右侧的线性移动组件140单独驱动，可以使打印喷头组件110的运动方向与其第一参考线121重合，即夹角α为零，进而避免夹角α影响打印喷头112垂直于辊筒130表面打印。其次，中间的两组打印喷头组件110由中间的线性移动组件140同时驱动，可以减少线性移动组件140的数量，缩减打印装置的整体尺寸。当然，为了保证中间的两组打印喷头组件110的喷绘质量，其喷孔的移动方向与第一参考线的夹角α应尽可能小。三组线性移动组 件140驱动打印喷头组件110移动，进而调整打印喷头组件110喷绘时的工作高度，满足不同厚度的打印介质和喷绘要求。
本实施例中，打印喷头组件110采用实施例2中的结构，对应辊筒130的半径为570mm。打印喷头组件110以30°间隔依次环绕辊筒130。中间的两组打印喷头组件110的第一参考线121与辊筒130的第四参考线124的夹角为15°。
本实施例中，线性移动组件140包括用于提供动力的伺服电机141、丝杠螺母142等，以及用于提供支撑的滑块143、导轨144、连接板145等。丝杆螺母的轴线，也即线性移动组件140的中心线均指向辊筒130的圆心。三组线性移动组件140以45°间隔依次环绕辊筒130，中间的线性移动组件140的中心线与辊筒130的第四参考线124重合。此外，左侧和右侧的打印喷头组件110通过紧固件分别居中安装在左侧和右侧的线性移动组件140的连接板145的下部，其喷头托盘111的第一参考线121与线性移动组件140的中心线重合。中间的两组打印喷头组件110通过紧固件同时安装中间的线性移动组件140的连接板145的下部，其喷头托盘111的第一参考线121与线性移动组件140的中心线呈15°夹角。
本实施例中，辊筒130的外表面设有多个气孔，辊筒130的内部连通外部的负压装置，辊筒130通过具有负压的气孔将打印介质吸附于其外表面。辊筒130的轴线端连接有驱动装置(如：电机)。辊筒130输送打印介质进行打印区域后，辊筒130上的气孔接通负压，进而将打印介质吸附于其外表面；辊筒130输送打印介质进入或离开打印区域，辊筒130上的气孔失去负压，打印介质依靠自身张力卷绕在其表面。辊筒130的具体结构可参考中国专利-202110615060.4-具有负压吸附的打印机辊筒。
优选地，所述辊筒打印装置100还包括第一加热辊161，或第一加热辊161和第二加热辊162；第一加热辊161用于加热所述打印介质的打印面；第二加热辊162用于加热所述打印介质的背面；打印介质依次卷绕第一加热辊161、所述辊筒130，或打印介质依次卷绕第二加热辊162、第一加热辊161、辊筒130。打印介质加热后进行喷墨印刷，有利于墨水的附着和溶剂的干燥，提升图文的色彩质量和降低后续对第一烘干装置300的干燥要求。打印介质的双面进行加热，可以避免其本身因受热产生褶皱形变。
可选地，所述辊筒打印装置100还包括第一UV固化组件171和第二UV固化组件172，第一UV固化组件171和第二UV固化组件172用于分次固化附着在所述打印介质的表面上的墨水；若干组第一UV固化组件171分别设置在若干组所述打印喷头组件110的喷头托盘111的一侧；第二UV固化组件172远离打印喷头组件110设置；打印介质依次经过若干组打 印喷头组件110、若干组第一UV固化组件171、第二UV固化组件172。
本方案中，针对UV墨水，则需要采用UV固化组件对其进行固化。喷墨印刷采用分色多次印刷，则打印喷头组件110通常设置为多组，每组打印喷头组件110完成一种颜色的喷墨印刷。打印介质依次通过多组打印喷头组件110时，每完成一种颜色的喷墨印刷，第一UV固化组件171对其UV墨水进行预固化，以防止未干燥的不同颜色的UV墨水产生相互干扰，导致图文不清晰。打印介质完成所有颜色的喷墨印刷后，第二UV固化组件172对所有UV墨水进行最终的完全的固化。
优选地，所述辊筒打印装置100还包括离子风棒180，离子风棒180用于去除所述打印介质的表面上的静电；打印介质依次经过离子风棒180和所述打印喷头组件110。
优选地，所述辊筒打印装置100还包括张紧辊组件190，张紧辊组件190用于调节打印介质进入辊筒打印装置100的张紧力。张紧辊可以上下运动，以拉紧或放松卷绕在其上的打印介质。
本实施例中，辊筒打印装置100的输入端和输出端位于左侧，打印介质以打印面朝上从左下方进入，以打印面朝下从左下方离开。张紧辊组件190位于辊筒130的最左侧。第一加热辊161和第二加热辊162位于辊筒130的左侧、张紧辊的右侧，第一加热辊161位于第二加热辊162的下方。离子风棒180位于辊筒130的左侧，第二加热辊162的上方。四组第一UV固化组件171分别安装在四组打印喷头组件110的喷头托盘111的右侧，第一UV固化组件171均位于辊筒130的上方。第二UV固化组件172安装在辊筒130的右侧。第二烘干装置400安装在辊筒130的右下方。
本实施例中，打印介质的输送轨迹如下：打印介质从辊筒130的左侧进入，依次卷绕张紧辊、第二加热辊162、第一加热辊161后，再卷绕在辊筒130上。打印介质依次经过离子风棒180、四组打印喷头组件110和对应的四组第一UV固化组件171、第二UV固化组件172、第二烘干装置400。打印介质绕辊筒130换向后，从辊筒130的左侧下方离开。
显然，本发明的上述实施例仅是为清楚地说明本发明技术方案所作的举例，而并非是对本发明的具体实施方式的限定。凡在本发明权利要求书的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。

Claims (10)

  1. 一种具有外置烘干的喷墨印刷系统，包括放卷装置、辊筒打印装置、第一烘干装置和收卷装置；其特征在于，打印介质由放卷装置进行展开，经辊筒打印装置进行喷墨印刷，再经第一烘干装置进行干燥，最后由收卷装置进行成卷；打印介质从辊筒打印装置的同一侧进入和离开；第一烘干装置外置于打印介质进出辊筒打印装置的同一侧。
  2. 根据权利要求1所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述放卷装置包括第一传感器和/或第二传感器，所述收卷装置包括第一传感器和/或第二传感器；第一传感器用于通过测量所述打印介质的卷面位置获得卷料的厚度；第二传感器用于通过测量所述打印介质的边缘位置获得卷料的偏移。
  3. 根据权利要求1所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述第一烘干装置包括箱体以及设置在箱体内腔的加热器、横流风扇和传动辊；横流风扇与传动辊上下相对布置，若干条传动辊和若干台横流风扇沿箱体的长度方向间隔布置；所述打印介质依次从若干条传动辊与若干台横流风扇之间的缝隙中穿过。
  4. 根据权利要求3所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述箱体沿所述打印介质的输送方向依次包括水平段和倾斜段，倾斜段的长度与水平段的长度之间的比值≥2，倾斜段的倾斜角度为25°至30°。
  5. 根据权利要求3所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述收卷装置还包括导引带，所述第一烘干装置还包括设置在其箱体内腔的牵引机构；导引带由收卷装置进行展开，经牵引机构夹持并沿所述打印介质的输送方向的反方向输送至箱体的另一侧，导引带依次从若干条所述传动辊与若干台所述横流风扇之间的缝隙中穿过。
  6. 根据权利要求1至5任一所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述辊筒打印装置包括辊筒、线性移动组件和打印喷头组件；辊筒用于卷绕并输送所述打印介质；线性移动组件用于驱动打印喷头组件，调整打印喷头组件与辊筒表面之间的距离；打印喷头组件用于对打印介质进行喷墨印刷；
    所述打印喷头组件包括喷头托盘和安装在其上的打印喷头，打印喷头在喷头托盘上呈若干排并列分布，且相邻两排上的打印喷头交错重叠；打印喷头相对于喷头托盘倾斜安装；若干排打印喷头环绕辊筒表面布置，若干排打印喷头的下表面组合形成一个凹陷的喷墨表面，喷墨表面的每个面与辊筒表面相切。
  7. 根据权利要求6所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述喷头托盘具有第一参考线，第一参考线指向所述辊筒表面的圆心；所述打印喷头的喷孔具有第二参 考线，第二参考线指向喷孔的喷墨方向；第一参考线与第二参考线之间的夹角为偏转角φ，打印喷头相对于第一参考线以偏转角φ倾斜安装；
    所述偏转角φ的计算公式为：
    Figure PCTCN2022142655-appb-100001
    L为喷孔至第一参考线的距离；
    H为喷头托盘至辊筒表面的高度；
    α为喷孔的移动方向与第一参考线的夹角；
    R为辊筒表面的半径。
  8. 根据权利要求6所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述辊筒打印装置还包括第一加热辊，或第一加热辊和第二加热辊；第一加热辊用于加热所述打印介质的打印面；第二加热辊用于加热所述打印介质的背面；打印介质依次卷绕第一加热辊、所述辊筒，或打印介质依次卷绕第二加热辊、第一加热辊、辊筒。
  9. 根据权利要求6所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述辊筒打印装置还包括第一UV固化组件和第二UV固化组件，第一UV固化组件和第二UV固化组件用于分次固化附着在所述打印介质的表面上的墨水；若干组第一UV固化组件分别设置在若干组所述打印喷头组件的喷头托盘的一侧；第二UV固化组件远离打印喷头组件设置；打印介质依次经过若干组打印喷头组件、若干组第一UV固化组件、第二UV固化组件。
  10. 根据权利要求6所述的一种具有外置烘干的喷墨印刷系统，其特征在于，所述辊筒打印装置还包括离子风棒，离子风棒用于去除所述打印介质的表面上的静电；打印介质依次经过离子风棒和所述打印喷头组件。
PCT/CN2022/142655 2022-08-02 2022-12-28 一种具有外置烘干的喷墨印刷系统 WO2024027091A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210922113.1 2022-08-02
CN202210922113.1A CN115384187B (zh) 2022-08-02 2022-08-02 一种具有外置烘干的喷墨印刷系统

Publications (1)

Publication Number Publication Date
WO2024027091A1 true WO2024027091A1 (zh) 2024-02-08

Family

ID=84118606

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/142655 WO2024027091A1 (zh) 2022-08-02 2022-12-28 一种具有外置烘干的喷墨印刷系统

Country Status (5)

Country Link
CN (1) CN115384187B (zh)
BE (1) BE1030192B1 (zh)
DE (1) DE202023102224U1 (zh)
NL (1) NL2034907B1 (zh)
WO (1) WO2024027091A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115339244B (zh) * 2022-07-22 2023-08-22 广州精陶机电设备有限公司 一种具有偏转角的打印喷头组件及打印装置
CN115384187B (zh) * 2022-08-02 2023-08-22 广州精陶机电设备有限公司 一种具有外置烘干的喷墨印刷系统

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995553A (en) * 1974-01-22 1976-12-07 Maschinenfabrik Augsburg-Nurnberg Ag Paper web threading apparatus for rotary printing presses
GB2322361A (en) * 1997-02-25 1998-08-26 Kampf Gmbh & Co Maschf Web lead-in
CN101117049A (zh) * 2006-08-04 2008-02-06 三星电子株式会社 具有阵列打印头筒的成像装置
CN102139566A (zh) * 2010-02-01 2011-08-03 精工爱普生株式会社 头安装部件以及液体喷射装置
CN107627715A (zh) * 2016-07-19 2018-01-26 昆山御龙包装器材有限公司 一种水性油墨印刷薄膜工艺及多色凹版印刷机
DE102016224975A1 (de) * 2016-12-14 2018-06-14 Heidelberger Druckmaschinen Ag Verfahren zur automatisierten Regelung der Druckkopfhöhe in einer Inkjet-Druckmaschine
DE102017211846A1 (de) * 2017-07-11 2019-01-17 Koenig & Bauer Ag Verfahren zum Drucken eines durch Daten einer Druckdatei vorgegebenen Druckbildes
CN112512821A (zh) * 2018-07-16 2021-03-16 西康制造有限公司 用于在柔性卷筒纸上喷墨打印的设备和方法
CN216330934U (zh) * 2021-11-05 2022-04-19 深圳圣德京粤科技有限公司 一种双面打印装置
CN115384187A (zh) * 2022-08-02 2022-11-25 广州精陶机电设备有限公司 一种具有外置烘干的喷墨印刷系统
CN218020809U (zh) * 2022-08-02 2022-12-13 广州精陶机电设备有限公司 一种带有外置烘干的喷墨印刷系统

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6499822B1 (en) * 1998-04-27 2002-12-31 Canon Kabushiki Kaisha Method and apparatus for forming an image on a recording medium with contraction and expansion properties
JP2001010067A (ja) * 1999-06-29 2001-01-16 Canon Inc 液体噴射記録ヘッドの吐出ノズル加工方法および液体噴射記録ヘッドの製造方法
US7510256B2 (en) * 2005-03-30 2009-03-31 Xerox Corporation Reflex printing with process direction stitch error correction
KR101212811B1 (ko) * 2011-04-20 2012-12-18 강창원 인쇄 필름 권취 장치
US9731515B2 (en) * 2013-08-29 2017-08-15 Hewlett-Packard Development Company, L.P. Variable humidity drying
JPWO2015129544A1 (ja) * 2014-02-28 2017-03-30 コニカミノルタ株式会社 インクジェット記録装置
DE102015205105B4 (de) * 2015-03-20 2019-09-12 Koenig & Bauer Ag Rollen-Druckmaschine
DE102015222622A1 (de) * 2015-11-17 2017-05-18 Koenig & Bauer Ag Druckaggregat und ein Verfahren zum Betreiben eines Druckaggregats
WO2017186286A1 (en) * 2016-04-27 2017-11-02 Hp Indigo B.V. A printing machine
US9827790B1 (en) * 2016-05-27 2017-11-28 Xerox Corporation Printing device and method of using the same
JP6922401B2 (ja) * 2017-05-15 2021-08-18 株式会社リコー ヘッド取付部材、アレイユニット及び画像形成装置
JP7347902B2 (ja) * 2019-09-17 2023-09-20 大阪シーリング印刷株式会社 印刷装置及びインクジェットによる印刷方法
EP3831603A1 (de) * 2019-12-06 2021-06-09 Windmöller & Hölscher KG Druckmaschine mit hybrider drucktechnik
JP7430084B2 (ja) * 2020-03-23 2024-02-09 株式会社Ｓｃｒｅｅｎホールディングス 印刷装置、印刷システムおよび印刷方法
CN115742571A (zh) * 2021-08-04 2023-03-07 杭州专色数码科技有限公司 一种打印设备
CN216330907U (zh) * 2021-10-26 2022-04-19 北京京隽科技有限公司 一种喷头安装调整装置
CN114312046A (zh) * 2021-12-10 2022-04-12 上海泰威技术发展股份有限公司 一种罐体数码打印结构

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995553A (en) * 1974-01-22 1976-12-07 Maschinenfabrik Augsburg-Nurnberg Ag Paper web threading apparatus for rotary printing presses
GB2322361A (en) * 1997-02-25 1998-08-26 Kampf Gmbh & Co Maschf Web lead-in
CN101117049A (zh) * 2006-08-04 2008-02-06 三星电子株式会社 具有阵列打印头筒的成像装置
CN102139566A (zh) * 2010-02-01 2011-08-03 精工爱普生株式会社 头安装部件以及液体喷射装置
CN107627715A (zh) * 2016-07-19 2018-01-26 昆山御龙包装器材有限公司 一种水性油墨印刷薄膜工艺及多色凹版印刷机
DE102016224975A1 (de) * 2016-12-14 2018-06-14 Heidelberger Druckmaschinen Ag Verfahren zur automatisierten Regelung der Druckkopfhöhe in einer Inkjet-Druckmaschine
DE102017211846A1 (de) * 2017-07-11 2019-01-17 Koenig & Bauer Ag Verfahren zum Drucken eines durch Daten einer Druckdatei vorgegebenen Druckbildes
CN112512821A (zh) * 2018-07-16 2021-03-16 西康制造有限公司 用于在柔性卷筒纸上喷墨打印的设备和方法
CN216330934U (zh) * 2021-11-05 2022-04-19 深圳圣德京粤科技有限公司 一种双面打印装置
CN115384187A (zh) * 2022-08-02 2022-11-25 广州精陶机电设备有限公司 一种具有外置烘干的喷墨印刷系统
CN218020809U (zh) * 2022-08-02 2022-12-13 广州精陶机电设备有限公司 一种带有外置烘干的喷墨印刷系统

Also Published As

Publication number Publication date
BE1030192A1 (de) 2023-08-10
NL2034907B1 (en) 2023-11-21
CN115384187A (zh) 2022-11-25
NL2034907A (en) 2023-06-26
BE1030192B1 (de) 2024-04-30
DE202023102224U1 (de) 2023-06-29
CN115384187B (zh) 2023-08-22

Similar Documents

Publication Publication Date Title
WO2024027091A1 (zh) 一种具有外置烘干的喷墨印刷系统
US7497567B2 (en) Recording apparatus
US8851662B2 (en) Recording medium conveyance device and image forming apparatus
EP2505369B1 (en) Sheet conveying device and ink jet recording apparatus
US20140176655A1 (en) Conveyance apparatus and image forming apparatus
CN218020809U (zh) 一种带有外置烘干的喷墨印刷系统
EP2700507B1 (en) Liquid ejection device
US8087773B2 (en) Ink jet printing depth of focus control apparatus
US9278508B2 (en) Film transfer apparatus
JP2002326339A (ja) フレキソ印刷機
JPWO2009044688A1 (ja) 排出装置、印刷機および段ボール製造機
JP3860651B2 (ja) プリンタ機構
JP5783965B2 (ja) メディア保持装置、メディア搬送装置、及び、インクジェット記録装置
WO2015060060A1 (ja) インクジェット記録装置及び媒体搬送方法
JP6062822B2 (ja) 搬送装置、画像形成装置、及び媒体搬送方法
US10131149B2 (en) Printing assembly
US10137693B2 (en) Printing assembly
US10265958B2 (en) Printing assembly and method for arranging at least one suction box in a printing assembly
US10265962B2 (en) Printing assembly
CN219600719U (zh) 一种喷墨打印机
JP2016132540A (ja) 記録媒体搬送装置及び画像記録装置
JP6114885B2 (ja) 払拭部材、ノズル払拭ユニット、及び画像形成装置
CN214646860U (zh) 一种多喷头数码印花机
US10596840B2 (en) Liquid discharging device
CN118181946A (zh) 一种喷墨打印机

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22953879

Country of ref document: EP

Kind code of ref document: A1