Double-sided printing ink-jet printer for printing special materials

Abstract

The invention discloses a double-sided printing ink-jet printer for printing special materials, and relates to the technical field of ink-jet printing on the special materials. A printing station is arranged on a conveying mechanism, the upper face and the lower face, located on the printing station, of a to-be-printed object can be printed, movable printing mechanisms are arranged above and below the printing station correspondingly, and each movable printing mechanism comprises a printing assembly, a moving assembly and two curing lamps. The two moving assemblies drive the respective printing assemblies to move correspondingly, the two printing assemblies conduct ink-jet printing on the upper face and the lower face of a to-be-printed object correspondingly, the curing lamps conduct ultraviolet irradiation curing on ink jetted to the to-be-printed object by the two printing assemblies, and therefore double-face simultaneous printing is achieved. Double-sided simultaneous printing of the to-be-printed material can be realized, the printing efficiency is remarkably improved, and the problems of low double-sided printing efficiency and difficulty in pattern alignment in the prior art are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing on special materials, in particular to an inkjet printer for double-sided printing of special materials such as building decoration materials. Background Art

[0002] Acrylic, metal and other materials are often used to make building decoration materials, such as walls, ceilings, partitions, etc. In order to play a decorative role, it is usually necessary to print text or patterns on them. Inkjet printers can be used to print patterns or text on these decorative materials made of acrylic, metal and other materials.

[0003] After printing, inkjet printers need to use UV lamps to quickly cure the ink. At present, because special materials such as acrylic and metal are different from paper and basically cannot be bent, printers in the existing technology can usually only print on one side when printing. This means that for materials that need to be printed on both sides, the operator must print on each side separately, resulting in overall low efficiency. This single-sided printing method not only consumes a lot of time, but also in the process of flipping and positioning the material, it is difficult to accurately control, which can easily lead to misalignment of the positions of the patterns on both sides, thereby seriously affecting the final print quality. Therefore, the printers in the existing technology have the problems of low efficiency and difficulty in pattern alignment in double-sided printing. There is an urgent need for an inkjet printing solution that can achieve simultaneous double-sided printing and effectively solve the above-mentioned defects. Summary of the Invention

[0004] The present invention aims to solve the technical problems of low efficiency and difficulty in pattern alignment in double-sided printing in existing inkjet printers, and provides an inkjet printer that can print on both sides of a material simultaneously.

[0005] The double-sided printing inkjet printer for printing special materials provided by the present invention comprises: A conveying mechanism, comprising a conveying member for conveying an object to be printed, the conveying mechanism also being provided with a printing station, wherein both upper and lower sides of the object to be printed are available for printing at the printing station; A mobile printing device includes two mobile printing mechanisms respectively arranged above and below the printing station, each of the mobile printing mechanisms includes a printing component, a moving component and two curing lamps, the two curing lamps are respectively arranged on both sides of the printing component, the two moving components respectively drive their respective printing components to move, the two printing components respectively perform inkjet printing on the upper and lower sides of the object to be printed, and each curing lamp cures the ink sprayed by the two printing components onto the object to be printed by ultraviolet light, thereby achieving simultaneous double-sided printing.

[0006] It also includes a telescopic clamping mechanism, which includes two telescopic clamping components respectively arranged above and below the printing station. Each telescopic clamping component includes a telescopic component and a clamping member. The two telescopic components each drive the clamping member connected to it to extend forward to jointly clamp the object to be printed located at the printing station, so that the distance between the print heads of the two printing components and the object to be printed is consistent.

[0007] In which, the telescopic clamping mechanism is provided with two groups, each group comprising two telescopic clamping assemblies, which are respectively arranged between the printing assembly and the curing lamp above and below the printing station. The two moving assemblies drive their respective printing assemblies to move synchronously, and the two clamping members located on the front end side of the moving direction of the printing assembly extend toward each other to jointly clamp the object to be printed at the printing station, so that the distance between the print heads of the two printing assemblies and the object to be printed is kept consistent; the two clamping members located on the rear end side of the moving direction of the printing assembly retract back to no longer clamp the object to be printed at the printing station, so as to avoid contact with ink that has not yet been cured by the curing lamp.

[0008] Among them, it also includes two shielding components, which are respectively close to the two side edges of the object to be printed. The shielding components are used to shield the ink sprayed or splashed by each other when the print heads of the two printing components spray ink towards each other.

[0009] Each of the shielding assemblies includes a shielding cylinder and a shielding member, and the shielding cylinder drives the shielding member to be closely attached to the edge of the object to be printed located at the printing station.

[0010] It also includes an injection device, which includes two groups of injection components, each group of the injection components includes two injection heads respectively arranged on the same side of the two printing mechanisms, and the two injection heads on the same side are arranged vertically opposite each other and respectively inject gas toward the printing object, so that the object to be printed that is no longer clamped by the clamping member can still maintain its vertical position in the printing station.

[0011] In which, each of the printing mechanisms is provided with multiple nozzles on the same side, and the multiple nozzles on the same side are connected. The two printing components respectively drive the multiple nozzles connected thereto to move so that each nozzle covers the width of the object to be printed, thereby maintaining the vertical position of the object to be printed in the printing station.

[0012] In which, the jet device also includes four adjustment springs and two jet slides, which are respectively arranged above and below the printing station. Each jet head can slide along the corresponding jet slide through a sliding block. The two adjacent jet heads on the same side are connected by a telescopic connecting rod. The outer jet heads of each group of connected multiple jet heads are connected to their respective adjustment springs, and the inner jet heads of each group of connected multiple jet heads are fixedly connected to one side of the corresponding printing component. The printing component drives the connected multiple jet heads to move along the jet slide, and the adjustment spring provides elastic force to make the multiple jet heads on the same side distributed at intervals.

[0013] Wherein, the air outlet of the air jet head is a porous structure.

[0014] Each group of jet components further includes two opposite magnetic materials, which are respectively arranged on each pair of corresponding jet heads to ensure that the corresponding jet heads are arranged facing each other.

[0015] The present invention has the following beneficial effects: By providing a printing station on the conveying mechanism, both the upper and lower sides of the object to be printed can be printed at the printing station. A movable printing mechanism is provided above and below the printing station, respectively. Each movable printing mechanism includes a printing assembly, a movable assembly, and two curing lamps. The two movable assemblies respectively drive their respective printing assemblies to move, and the two printing assemblies respectively perform inkjet printing on the upper and lower sides of the object to be printed. Each curing lamp cures the ink sprayed onto the object by the two printing assemblies using ultraviolet light, thereby achieving simultaneous double-sided printing. This method enables simultaneous printing on both sides of the material to be printed, significantly improving printing efficiency and effectively solving the problems of low double-sided printing efficiency and difficulty in pattern alignment in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the inkjet printer of the present invention.

[0017] Figure 2 The present invention is a schematic structural diagram of an inkjet printer with a lifting and lowering roller mechanism hidden.

[0018] Figure 3 It is a structural diagram of the conveying mechanism.

[0019] Figure 4 It is a structural schematic diagram of a mobile printing device and an object to be printed.

[0020] Figure 5 It is a structural diagram of the mobile printing device and the jet device.

[0021] Figure 6 yes Figure 5 A partial enlarged view of middle A.

[0022] Figure 7 This is a structural diagram of the mobile printing device and the jet device from another angle.

[0023] Figure 8 yes Figure 7 A partial enlarged view of B.

[0024] Included in the diagram: 1. Conveying mechanism, 11. First conveying member, 12. Second conveying member, 13. Conveying mounting frame, 14. Printing station, 2. Mounting seat, 21. Lifting roller mechanism, 211. Lifting frame, 212. Pressing roller, 213. Lifting cylinder, 3. Mobile printing device, 31. Mobile printing mechanism, 311. Printing assembly, 3111. Print nozzle, 312. Mobile assembly, 3121. Print beam, 3122. Print rail, 3123. Print slider, 3124. Motor, 3125. Synchronous belt, 313. Curing lamp, 4. Telescopic clamping assembly, 41. Telescopic assembly, 42. Clamping part (roller), 51. Blocking cylinder, 52. Blocking piece, 6. Jet device, 61. Jet head, 62. Adjustment spring, 63. Jet rail, 64. Fixed block, 65. Telescopic connecting rod, 66. Heterotropic magnetic material, 7. Object to be printed. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to specific embodiments.

[0026] This embodiment provides an inkjet printer, such as Figures 1 to 3 As shown, it includes a conveying mechanism 1, a mounting seat 2 and a mobile printing device 3 arranged on the mounting seat 2. The conveying mechanism 1 includes a conveying mounting frame 13, a first conveying member 11 and a second conveying member 12. The first conveying member 11 and the second conveying member 12 are both arranged on the conveying mounting frame 13. A printing station 14 is provided between the first conveying member 11 and the second conveying member 12. The object 7 to be printed is conveyed forward in sequence by the first conveying member 11 and the second conveying member 12. When the object 7 to be printed is located at the printing station 14, both the upper and lower sides of the object 7 to be printed can be printed.

[0027] like Figure 4 and Figure 6As shown, the mobile printing device 3 includes two mobile printing mechanisms 31, one located above and one below the printing station 14. Each mobile printing mechanism 31 includes a printing assembly 311, a moving assembly 312, and two curing lamps 313. The two curing lamps 313 are symmetrically located on either side of the printing assembly 311. The moving assembly 312 drives the printing assembly 311 to simultaneously perform inkjet printing on the upper and lower surfaces of the object 7 to be printed. Simultaneously, the curing lamps 313 instantly cure the ink through ultraviolet light. This simultaneous printing and curing of both sides of the object 7 achieves efficient double-sided printing.

[0028] Specifically, if Figure 4 As shown, each moving component 312 includes a printing beam 3121, a printing slide 3122, a printing slider 3123, a motor 3124 and a synchronous belt 3125. The printing beam 3121 below the printing station 14 is fixedly connected to the mounting base 2. The length of the printing beam 3121 is greater than the width of the conveyor. The printing slider 3122 is fixedly connected along the length direction of the printing beam 3121. The printing slider 3123 can slide along the printing slide 3122. The printing slider 3123 is connected to the printing component 311. The motor 3124 is provided at one end of the printing beam 3121. The rotating end of the motor 3124 drives the printing slider 3123 to slide back and forth along the printing slide 3122 through the synchronous belt 3125, so that the printing component 311 performs inkjet printing on the object 7 to be printed. Preferably, the rotating end of the motor 3124 simultaneously drives the synchronous belts 3125 above and below the printing station 14 to rotate, thereby driving the two printing components 311 to move synchronously, reducing the use of one motor 3124 and simplifying the structure.

[0029] like Figure 1As shown, the mounting base 2 is also provided with a lifting roller mechanism 21, which includes a lifting frame 211, two pressure rollers 212 arranged on the lifting frame 211 and four lifting cylinders 213, wherein the two lifting cylinders 213 are arranged on the left and right sides of the first conveying member 11 close to the printing station 14, and the other two lifting cylinders 213 are arranged on the left and right sides of the second conveying member 12 close to the printing station 14. The lifting ends of the four lifting cylinders 213 are all connected to the lifting frame 211, and the two pressure rollers 212 are respectively arranged above the first conveying member 11 and the second conveying member 12 close to the printing station 14; the two pressure rollers 212 are used to press against the to-be-printed object 7 conveyed forward by the first conveying member 11 and the second conveying member 12 to prevent the to-be-printed object 7 from jumping during the forward conveyance; and the four lifting cylinders 213 can jointly adjust the distance between the pressure roller 212 and the first conveying member 11 and the second conveying member 12 to adapt to the to-be-printed objects 7 of different thicknesses. The lifting frame 211 can also be fixedly connected to the printing beam 3121 located above the printing station 14, so that the four lifting cylinders 213 can also jointly adjust the distance between the upper printing component 311 and the object 7 to be printed.

[0030] When the object 7 to be printed is a thin acrylic plate or cardboard or other materials with low hardness, the object 7 to be printed at the printing station 14 may sag and bend due to its own gravity, or the airflow caused by the back-and-forth movement of the printing assembly 311 may cause the object 7 to swing up and down, which may easily cause the object 7 to be printed and the printing assembly 311 to contact and scratch. Figure 7 and Figure 8 As shown, a telescopic clamping assembly 4 is positioned between each printing assembly 311 and the left and right curing lamps 313. Each telescopic clamping assembly 4 comprises a telescopic assembly 41 and a clamping member 42. The two corresponding telescopic assemblies 41, positioned above and below, each drive their connected clamping members 42 to move toward each other, thereby jointly clamping the object 7 to be printed at the printing station 14. This ensures that the print heads 3111 of the two printing assemblies 311 maintain a consistent distance from the object 7 to be printed. This is particularly important for printing on thinner acrylic sheets, cardboard, or other materials with lower hardness. It effectively prevents the object 7 to be printed from sagging due to its own weight or swinging due to airflow, thereby preventing contact and scratching between the object 7 and the printing assembly 311, and providing a stable foundation for subsequent inkjet printing.

[0031] Since the inkjet printer needs to be cured by ultraviolet radiation from the curing lamp 313 after the ink is sprayed by the printing component 311, if the clamping member 42 is clamped immediately, the ink may not be completely cured and the pattern may be blurred, thus affecting the printing quality. Figure 5 and Figure 6As shown, the two moving assemblies 312 above and below the printing station 14 drive their respective printing assemblies 311 to move synchronously, and the two clamping members 42 located on the front side of the moving direction of the printing assembly 311 extend toward each other to jointly clamp the object to be printed 7 located at the printing station 14, so that the distance between the print heads 3111 of the two printing assemblies 311 and the object to be printed 7 is consistent; the two clamping members 42 located on the rear side of the moving direction of the printing assembly 311 retract back to no longer clamp the object to be printed 7 located at the printing station 14, so as to avoid contact with ink that has not yet been cured by the curing lamp 313. By configuring the left and right clamping members 42 of the printing assembly 311 to be retractable, when the two printing assemblies 311 move synchronously to the left, the two clamping members 42 on the left extend forward to jointly clamp the object 7 to be printed, while the two clamping members 42 on the right retract backward. When the two printing assemblies 311 move synchronously to the right, the two clamping members 42 on the right extend forward to jointly clamp the object 7 to be printed, while the two clamping members 42 on the left retract backward. This prevents the clamping members 42 from immediately contacting the printing surface after printing, thereby affecting print quality. Preferably, the retractable assembly 41 is a retractable cylinder, and the clamping member 42 is a roller 42. The use of the roller 42 can reduce friction between the clamping member 42 and the object 7 to be printed, making the movement of the printing assembly 311 smoother.

[0032] like Figure 7 and Figure 8 As shown, when the upper and lower printing components 311 need to print on both sides of the object 7 to be printed, the print heads 3111 of the two printing components 311 will partially or completely project vertically away from the object 7 to be printed, that is, the upper and lower print heads 3111 will face each other. At this time, the two print heads 3111 may spray ink at each other, or uncured ink may splash onto the opposite print head 3111 due to gravity or airflow, thereby clogging the print heads 3111. Figure 2 、 Figure 7 and Figure 8 As shown, the inkjet printer of the present invention also includes two shielding assemblies, each of which is in close contact with the edges of the object 7 to be printed. When the two print heads 3111 are facing each other, the shielding assemblies can shield the ink ejected by the two print heads 3111 from each other, thereby protecting the cleanliness of the two print heads 3111. Preferably, each shielding assembly includes a shielding cylinder 51 and a shielding member 52. The shielding cylinder 51 drives the shielding member 52 to closely contact the edge of the object 7 to be printed at the printing station 14. By driving the shielding member 52 to move, the shielding cylinder 51 can accommodate objects 7 of varying widths to be printed.

[0033] like Figure 8As shown, when the two printing assemblies 311 move to the left edge of the object 7 to be printed, the two rollers 42 on the left side of the two printing assemblies 311 have already vertically projected away from the object 7, while the two rollers 42 on the right side of the two printing assemblies 311 are no longer gripping the object 7 (to avoid gripping uncured ink). Therefore, when the object 7 is made of a thin acrylic sheet, cardboard, or other material with low hardness, the object 7 at the printing station 14 may sag and bend due to its own gravity, or may be caused to swing up and down by the airflow generated by the back-and-forth movement of the printing assemblies 311. This can easily cause contact and scratches between the object 7 and the printing assemblies 311. This can also cause the left shield 52 to become misaligned with the edge of the object 7, causing uncured ink to splash onto the opposite print head 3111 due to gravity or airflow, thereby clogging the print head 3111. When the two printing components 311 move synchronously from left to right to print the right edge of the object 7 to be printed, the same technical problem will also be encountered. In order to solve this technical problem, Figure 2 As shown, the inkjet printer also includes an air jet device 6, combined with Figure 7 and Figure 8 The air jet device 6 includes four air jet heads 61, respectively located on the left and right outer sides of the two printing mechanisms. The corresponding air jet heads 61 on the same side form a group of air jet assemblies. Thus, the two air jet heads 61 on the same side are arranged vertically opposite each other and respectively spray air toward the object to be printed, so that the object to be printed 7, no longer clamped by the rollers 42, can still maintain its vertical position within the printing station 14. When the object to be printed 7 is no longer clamped by the rollers 42, the dynamic support of the airflow maintains the stability of its vertical position within the printing station 14. This prevents the object to be printed 7 from sagging due to gravity or swinging up and down due to the airflow of the printing assembly 311, which could cause scratches on the object 7 due to contact with the print head 3111, or ink splashing onto the opposite print head 3111 due to unstable position, thereby ensuring stability during the printing process and the cleanliness of the print head 3111.

[0034] Preferably, if Figure 5 、 Figure 7 、 Figure 8As shown, each printing mechanism is equipped with multiple jet heads 61 on the same side. The jet heads 61 on the same side are connected. The two printing assemblies 311 each drive the connected jet heads 61 to move so that each jet head 61 covers the width of the object 7 to be printed, thereby maintaining the vertical position of the object 7 to be printed within the printing station 14. The jet device 6 also includes four adjustment springs 62 and two jet rails 63, which are located above and below the printing station 14, respectively. Specifically, fixed blocks 64 are fixedly connected to each end of each printing beam 3121, and the two fixed blocks 64 are fixedly connected to each end of each jet rail 63. Each jet head 61 is slidably connected to the corresponding jet rail 63 via a sliding block. Two adjacent jet heads 61 on the same side are connected by a telescopic connecting rod 65. One end of each adjustment spring 62 is fixedly connected to the corresponding fixed block 64, and the other end is fixedly connected to the outermost jet heads 61 in each group of connected jet heads 61. The inner jet head 61 of each group of connected jet heads 61 is fixedly connected to the side of the corresponding printing assembly 311. The printing assembly 311 drives the connected jet heads 61 along the jet slide 63, and the adjustment spring 62 provides elastic force to space the multiple jet heads 61 on the same side. The telescopic connecting rod 65 connects the adjacent jet heads 61 to form a telescopic linkage structure. When the printing assembly 311 drives the jet device 6 to move, the cooperation of the connecting rod and the slide allows the jet heads 61 to achieve overall telescopic and mobile while maintaining the spaced distribution. This also effectively shortens the overall length of the jet device 6, thereby reducing the space occupied by the inkjet printer.

[0035] In this embodiment, the air outlet of the nozzle 61 is designed to be multi-porous. This multi-porous design can disperse the airflow, avoid excessive pressure in a single hole and damage the ink just sprayed, and also prevent excessive airflow from disturbing the ink trajectory during inkjet.

[0036] In this embodiment, Figure 6 and Figure 8 As shown, each jet assembly also includes two anisotropic magnetic materials 66, which are respectively provided on each pair of corresponding jet heads 61 to ensure that the corresponding jet heads 61 are aligned. This magnetic design ensures that the corresponding jet heads 61 remain precisely aligned during extension or movement, thereby further optimizing the jet effect and avoiding the negative effects caused by inaccurate alignment.

[0037] The specific operation process and working principle of inkjet printer: First, the object 7 to be printed is placed at the starting end of the conveyor mechanism 1. The first and second conveyor members 11, 12 of the conveyor mechanism 1 operate, moving the object 7 smoothly forward until it reaches the printing station 14. During this process, the lifting and pressing roller mechanism 21 is activated, and its pressing roller 212, driven by the lifting cylinder 213, rises and presses against the object 7 being conveyed, preventing it from bouncing due to inertia or vibration during transportation. When the object 7 is accurately positioned at the printing station 14, both its upper and lower sides are ready for printing.

[0038] Before the printing process begins, the two telescopic clamping assemblies 4 of the telescopic clamping mechanism begin operation to ensure that the print head 3111 of the printing assembly 311 maintains a precise and consistent distance from the surface of the object 7 to be printed. The telescopic assemblies 41 located above and below the print station 14 each drive their connected rollers 42 to extend forward, working together to roll and clamp the object 7 to be printed within the print station 14. Simultaneously, two shielding cylinders 51 drive their shielding members 52 to move, closely contacting the edges of the object 7 to be printed. Simultaneously, multiple air jets 61 spray gas toward the object 7 to be printed, dynamically supporting it and maintaining its vertical position within the print station 14.

[0039] At the start of a print job, the two mobile printing mechanisms 31 located above and below the print station 14 are activated synchronously. The mobile assembly 312 within the printing mechanism drives the printing assembly 311 back and forth along the length (printing direction) of the print beam 3121. Multiple jet heads 61 are attached to the same side of each printing mechanism. These jet heads 61 are connected by a telescopic link 65. Each jet head 61 slides along a jet rail 63 via a sliding block. Adjustable springs 62 provide elastic force to maintain even spacing between adjacent jet heads 61, ensuring that each jet head 61 covers the width of the object 7 to be printed, ensuring comprehensive airflow support for the object 7 during printing. As the printing assembly 311 moves, it performs inkjet printing on the object 7, achieving synchronized pattern output on both sides. A curing lamp 313, located immediately behind the printing assembly 311, immediately cures the ink sprayed onto the object 7 with ultraviolet light, ensuring rapid adhesion and solidification, and preventing ink spreading or blurring.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. Double-sided printing inkjet printer for special material printing, characterized by: include: A conveying mechanism, comprising a conveying member for conveying an object to be printed, the conveying mechanism also being provided with a printing station, wherein both upper and lower sides of the object to be printed are available for printing at the printing station; A mobile printing device includes two mobile printing mechanisms respectively arranged above and below the printing station, each of the mobile printing mechanisms includes a printing component, a moving component and two curing lamps, the two curing lamps are respectively arranged on both sides of the printing component, the two moving components respectively drive their respective printing components to move, the two printing components respectively perform inkjet printing on the upper and lower sides of the object to be printed, and each curing lamp cures the ink sprayed by the two printing components onto the object to be printed by ultraviolet light, thereby achieving simultaneous double-sided printing.

2. The inkjet printer according to claim 1, wherein It also includes a telescopic clamping mechanism, which includes two telescopic clamping assemblies respectively arranged above and below the printing station, each of the telescopic clamping assemblies includes a telescopic assembly and a clamping member, and the two telescopic assemblies each drive the clamping member connected to it to extend forward to jointly clamp the object to be printed located at the printing station, so that the distance between the print heads of the two printing assemblies and the object to be printed is consistent.

3. The inkjet printer according to claim 2, wherein: The telescopic clamping mechanism is provided with two groups, each group comprising two telescopic clamping assemblies, which are respectively provided between the printing assembly and the curing lamp above and below the printing station. The two moving assemblies drive their respective printing assemblies to move synchronously, and the two clamping members located on one side of the front end of the moving direction of the printing assembly extend toward each other to jointly clamp the object to be printed located at the printing station, so that the distance between the print heads of the two printing assemblies and the object to be printed remains consistent; The two clamping members located on one side of the rear end of the moving direction of the printing assembly are retracted backwards to no longer clamp the object to be printed located at the printing station, so as to avoid contact with ink that has not been cured by the curing lamp.

4. The inkjet printer according to claim 2 or 3, characterized in that: It also includes two shielding components, which are respectively close to the two side edges of the object to be printed. The shielding components are used to shield the ink sprayed or splashed by each other when the print heads of the two printing components spray ink towards each other.

5. The inkjet printer according to claim 4, wherein Each of the shielding assemblies includes a shielding cylinder and a shielding member, and the shielding cylinder drives the shielding member to be closely attached to the edge of the object to be printed located at the printing station.

6. The inkjet printer according to claim 5, wherein: It also includes an injection device, which includes two groups of injection assemblies, each group of the injection assemblies includes two injection heads respectively arranged on the same side of the two printing mechanisms, and the two injection heads on the same side are arranged vertically opposite each other and respectively inject gas toward the printing object, so that the object to be printed that is no longer clamped by the clamping member can still maintain its vertical position in the printing station.

7. The inkjet printer according to claim 6, wherein: Each of the printing mechanisms is provided with multiple nozzles on the same side, and the multiple nozzles on the same side are connected. The two printing components respectively drive the multiple nozzles connected thereto to move so that each nozzle covers the width of the object to be printed, thereby maintaining the vertical position of the object to be printed in the printing station.

8. The inkjet printer according to claim 7, wherein: The jet device also includes four adjustment springs and two jet slides, which are respectively arranged above and below the printing station. Each jet head can slide along the corresponding jet slide through a sliding block. The two adjacent jet heads on the same side are connected by a telescopic connecting rod. The outer jet heads of each group of connected multiple jet heads are connected to their respective adjustment springs, and the inner jet heads of each group of connected multiple jet heads are fixedly connected to one side of the corresponding printing component. The printing component drives the connected multiple jet heads to move along the jet slide, and the adjustment spring provides elastic force to make the multiple jet heads on the same side distributed at intervals.

9. The inkjet printer according to claim 8, wherein The air outlet of the air jet head is a porous structure.

10. The inkjet printer according to claim 9, wherein Each group of jet components further includes two opposite magnetic materials, which are respectively arranged on each pair of corresponding jet heads, so as to ensure that the corresponding jet heads are arranged opposite to each other.

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