A printing apparatus for forming a bag pattern and a bag production system

Abstract

The application discloses a printing device and a packaging bag production system for forming a packaging bag pattern. The printing device comprises at least one color seat, a mounting frame, a code printing machine, a curing unit and a second guide roller; the mounting frame is fixedly connected to the color seat, and a first guide roller rotating around a second direction is arranged at the entrance of the mounting frame to receive a packaging bag film material from an adjacent color seat; the code printing machine is arranged on the mounting frame corresponding to the outlet, and is used for printing a target pattern on the packaging bag film material; the curing unit is arranged corresponding to the nozzle of the code printing machine in the first direction of the code printing machine, and is used for drying the target pattern on the packaging bag film material; the second guide roller is arranged on the color seat in the first direction of the curing unit, and is rotatably arranged around the second direction, and is used for receiving and guiding the packaging bag film material from the curing unit to the printing area of the color seat; wherein the first direction and the horizontal plane satisfy the vertical condition, and the second direction and the first direction satisfy the vertical condition.

Description

Technical Field

[0001] This application relates to the field of packaging technology, and in particular to a printing device and packaging bag production system for forming patterns on packaging bags. Background Technology

[0002] Currently, the text and graphics on FMCG packaging largely rely on printing processes, such as gravure printing. With the trend of diversified promotional models and packaging, dynamic graphics such as QR codes, anti-counterfeiting marks, and traceability codes have emerged; correspondingly, dynamic graphics cannot be formed through printing but need to be formed through inkjet printing.

[0003] Currently, dynamic patterns on product packaging need to be transferred to inkjet printing equipment for inkjet printing only after all printing processes are completed, which is inefficient and requires a large amount of labor from operators. Utility Model Content

[0004] This application provides a printing device for forming patterns on packaging bags, which solves the problem that dynamic patterns on product packaging need to be transferred to inkjet printing equipment for inkjet printing only after all printing processes are completed, resulting in low efficiency and a large workload for operators.

[0005] To address the aforementioned technical problems, the embodiments of this application provide the following technical solutions: The first aspect of this application provides a printing apparatus for forming a pattern on a packaging bag, comprising: At least two color seats, wherein the at least two color seats are arranged side by side and spaced apart along a third direction; Mounting frame, which is fixedly connected to the color holder in a one-to-one correspondence. The mounting frame has an inlet and an outlet opposite each other in a first direction. The inlet is provided with a first guide roller that rotates about a second direction for receiving packaging bag film material from the adjacent color holder. At least two inkjet printers are configured corresponding to at least two of the aforementioned color bases. The inkjet printers are positioned on the mounting frame corresponding to the outlet and are used to print target patterns onto the packaging bag film. The inkjet printers located on the at least two color bases are spaced apart along the second direction when their orthogonal projection along a third direction is along the third direction, so that the printing range of the inkjet printers located on the at least two color bases can be adapted to the printing width of the color base. A curing unit is provided, which corresponds one-to-one with the inkjet printer and is positioned in the first direction of the inkjet printer to correspond to the printhead of the inkjet printer, for drying the target pattern on the packaging bag film. The second guide roller is disposed on the color holder in a first direction of the curing unit and rotates around the second direction to receive and guide the packaging bag film from the curing unit to the printing area of ​​the color holder. Wherein, the first direction satisfies the condition of being perpendicular to the horizontal plane, and the second direction and the third direction both satisfy the condition of being perpendicular to the first direction.

[0006] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming packaging bag patterns, wherein the inkjet printer located on one of the color seats and the inkjet printers located on the other color seats are arranged sequentially along the second direction in the orthographic projection of the third direction; or The inkjet printer located on one of the color holders and the inkjet printers located on other color holders are alternately arranged in the second direction along the third-party orthogonal projection.

[0007] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming packaging bag patterns, wherein the inkjet printer is configured with full-color LED ultraviolet curable ink; The curing unit includes an ultraviolet lamp.

[0008] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming packaging bag patterns further includes an image acquisition unit and a controller; The image acquisition unit and the curing unit are respectively arranged in the first direction of the curing unit to acquire the image of the target area on the packaging bag film, and the target area is printed with the target pattern; The controller is signal-connected to the image acquisition unit and is used to determine the printing quality based on the image acquired by the image acquisition unit.

[0009] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming a packaging bag pattern further includes a third guide roller, a fourth guide roller, and a fifth guide roller that rotate about the second direction. The printhead of the inkjet printer extends along the first direction; The third guide roller and the fourth guide roller are arranged at the same height and spaced apart along the third direction in the first direction of the printhead to form a support and flattening area, so that the packaging bag film material can form a printing flat area between the third guide roller and the fourth guide roller; The fifth guide roller is disposed between the first guide roller and the third guide roller, and is used to turn the packaging bag film to the support flattening area; Wherein, the third direction satisfies the perpendicular condition to both the first direction and the second direction.

[0010] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming a packaging bag pattern further includes a sixth guide roller; The sixth guide roller is rotatably disposed on the first direction of the fifth guide roller around the second direction, and is used to form a curing irradiation area between the fourth guide roller and the sixth guide roller corresponding to the curing unit; The fifth guide roller, the third guide roller, and the sixth guide roller are distributed sequentially along the first direction by their orthogonal projections along the third direction.

[0011] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming a pattern on a packaging bag further includes a tension roller; The tension roller is disposed between the first guide roller and the fifth guide roller, and the tension roller is located in the third direction of the fifth guide roller. The tension roller is rotatably disposed around the second direction for tensioning the packaging bag film.

[0012] In some modified embodiments of the first aspect of this application, in the aforementioned printing equipment for forming a pattern on a packaging bag, the third guide roller and / or the fourth guide roller are movably disposed on the mounting frame along the third direction to be able to adjust the size of the support flattening area.

[0013] In some modified embodiments of the first aspect of this application, the aforementioned printing equipment for forming a pattern on a packaging bag further includes a position sensor; The position sensor is mounted on the mounting frame and is signal-connected to the controller to detect the position of the packaging bag film and transmit it to the controller. The controller can control the start and stop of the inkjet printer according to the position of the packaging bag film.

[0014] A second aspect of this application provides a packaging bag production system, which includes at least one printing device for forming a packaging bag pattern. The printing device for forming the packaging bag pattern includes: At least two color bases; Mounting frame, which is fixedly connected to the color holder in a one-to-one correspondence. The mounting frame has an inlet and an outlet opposite each other in a first direction. The inlet is provided with a first guide roller that rotates about a second direction for receiving packaging bag film material from the adjacent color holder. At least two inkjet printers are configured corresponding to at least two of the aforementioned color seats. The inkjet printers are set on the mounting frame corresponding to the outlet and are used to print target patterns onto the packaging bag film. The inkjet printers located on the at least two color seats are arranged sequentially along the second direction with their orthogonal projection along a third direction, so that the printing range of the inkjet printers located on the at least two color seats can be adapted to the printing width of the color seats. A curing unit is provided, which corresponds one-to-one with the inkjet printer and is positioned in the first direction of the inkjet printer to correspond to the printhead of the inkjet printer, for drying the target pattern on the packaging bag film. The second guide roller is disposed on the color holder in a first direction of the curing unit and rotates around the second direction to receive and guide the packaging bag film from the curing unit to the printing area of ​​the color holder. Wherein, the first direction satisfies the condition of being perpendicular to the horizontal plane, and the second direction and the third direction both satisfy the condition of being perpendicular to the first direction.

[0015] Compared to existing technologies, the printing equipment for forming packaging bag patterns provided in this embodiment, through a mounting bracket, places the inkjet printer on the inkjet printer's color setter, enabling printing and coding to be completed in a single process without the need to change workstations, greatly improving efficiency and effectively reducing the workload of operators. A curing unit is also included to rapidly cure and set the target pattern, ensuring its stability before entering the printing area, preventing damage to the film material, increasing yield, and reducing costs. Furthermore, the simultaneous placement of inkjet printers on different color sets in this embodiment allows for the simultaneous printing of multiple rows of target patterns on packaging bag films with larger widths, significantly improving coding efficiency. Attached Figure Description

[0016] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein: Figure 1 A schematic diagram of a first structure of a printing apparatus for forming a pattern on a packaging bag provided in this embodiment is shown. Figure 2 A schematic diagram of a second structure of the printing equipment for forming packaging bag patterns provided in this embodiment is shown. Figure 3 This schematic diagram illustrates the usage status of the printing equipment for forming packaging bag patterns provided in this embodiment; Figure 4 A schematic diagram of the mounting frame in the printing equipment for forming packaging bag patterns provided in this embodiment is shown. Figure 5 This schematically illustrates another perspective view of the mounting frame in the printing equipment for forming packaging bag patterns provided in this embodiment; Figure 6 A schematic diagram of the printing equipment for forming patterns on packaging bags provided in this embodiment is shown. Figure 7 A schematic diagram of the finished packaging bag is shown. Reference numerals: Color holder 1, Printing area 11, Oven 12, Mounting frame 2, First guide roller 21, Guide roller frame 22, Third guide roller 23, Fourth guide roller 24, Fifth guide roller 25, Support flattening area 26, Sixth guide roller 27, Curing irradiation area 28, Inkjet printer 3, Printhead 31, Curing unit 4, Second guide roller 5, Packaging bag film material 6, Target pattern 61, Target area 62, Controller 7, Image acquisition unit 8, Tension roller 9, Seventh guide roller 10, Eighth guide roller 101, Position sensor 102, First direction a, Second direction b, Third direction c. Detailed Implementation

[0017] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0018] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that in the description of this specification, the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0020] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships, such as A and / or B. Specifically, it can be understood as: A and B can be included at the same time, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0022] Currently, dynamic graphics on FMCG packaging cannot be formed through printing, but this includes, but is not limited to, lottery QR codes, traceability codes, anti-counterfeiting labels, personalized co-branded or limited-edition text or graphics, serial numbers, dates, etc., such as the lottery QR codes on instant noodle seasoning packets. Instead, they need to be formed through inkjet printing. Furthermore, the dynamic graphics on product packaging need to be transferred to inkjet printing equipment for inkjet printing only after all other printing processes are completed. For example, the film material of the packaging bag needs to be printed with text or graphics of various colors sequentially on a multi-color gravure printing machine, then the film material is transferred to a digital inkjet printing station for QR code printing, and after inkjet printing, the film material is transferred to a gravure printing machine for full-page background color printing. Finally, the packaging bag is bonded, filled with seasoning, heat-sealed, and die-cut to form a complete seasoning packet. However, this method requires at least three printing-related processes and techniques, which is not only inefficient and labor-intensive for operators during the changeover process, but also prone to damaging the film material during the changeover, reducing the yield and increasing costs.

[0023] Therefore, the printing equipment for forming packaging bag patterns provided in this embodiment provides a mounting position for the inkjet printer by setting a mounting bracket on the color set, and cooperating with a curing unit to quickly cure and shape the target pattern, ensuring the stability of the target pattern before entering the printing area; it realizes that printing and coding can be completed in one go in the same printing equipment without changing the operating position, improving efficiency while effectively reducing the workload of operators, avoiding damage to the film material, increasing the yield, and reducing cost. At the same time, multiple inkjet printers are set up for multiple color sets, which can cover the entire width of the color set for batch multi-row synchronous coding, further improving efficiency.

[0024] Example 1 Reference Appendix Figure 1 and attached Figure 3The printing equipment for forming packaging bag patterns provided in this application includes at least two color seats 1, mounting frames 2 corresponding to each color seat 1, at least two inkjet printers 3, curing units 4 corresponding to each inkjet printer 3, and second guide rollers 5. The at least two color seats 1 are arranged side-by-side and spaced apart along a third direction c. The mounting frames 2 are fixed to the color seats 1 and have an inlet and an outlet opposite each other along a first direction a. A first guide roller 21 rotating about a second direction b is provided at the inlet to receive packaging bag film 6 from adjacent color seats 1. The at least two inkjet printers 3 are configured corresponding to the at least two color seats 1, and the inkjet printers 3 are disposed on the mounting frames 2 corresponding to the outlet, for printing onto the packaging bag film 5. The target pattern 61 is printed on the inkjet printer 3 located on at least two of the inkjet printer bases 1. The orthographic projection of the inkjet printer 3 on the third direction c is spaced apart along the second direction b so that the printing range of the inkjet printer 3 located on at least two of the inkjet printer bases 1 can be adapted to the printing width of the inkjet printer base 1. The curing unit 4 is arranged on the inkjet printer 3 in the first direction a corresponding to the printhead of the inkjet printer 3, and is used to dry the target pattern 61 on the packaging bag film 6. The second guide roller 5 is arranged on the inkjet printer base 1 in the first direction a of the curing unit 4. The second guide roller 5 is rotatably arranged around the second direction b, and is used to receive and guide the packaging bag film 6 from the curing unit 4 to the printing area 11 of the inkjet printer base 1. Wherein, the first direction a is perpendicular to the horizontal plane, and the second direction b and the third direction c are both perpendicular to the first direction a.

[0025] Understandably, to address the problem that dynamic patterns on product packaging require secondary printing after all printing processes are completed, resulting in low efficiency and a heavy workload for operators, especially during large-scale printing with wide print widths, this embodiment provides a printing device for forming packaging bag patterns. This device uses a mounting bracket 2 to connect the inkjet printer 3 to the inkjet printer's color base 1, enabling simultaneous printing and coding in the same process without changing operating positions. This improves efficiency and prevents film damage. Simultaneously, a curing unit 4 is provided to rapidly solidify the target pattern 61, ensuring the film's stability before entering the printing area and preventing the second guide roller 5 from affecting the integrity and clarity of the target pattern 61, thus increasing yield and reducing costs. Furthermore, all inkjet printers 3 are configured to fully cover the width of the color base 1, enabling batch multi-row coding and further improving printing efficiency.

[0026] In this embodiment, the printing equipment for forming packaging bag patterns can be based on a gravure printing machine or a letterpress printing machine. The following description will use a gravure printing machine as an example. A gravure printing machine includes multiple parallel and spaced color presses 1, each color press 1 being a printing unit or printing color group. Each color press 1 corresponds to a printing plate cylinder and an ink supply system, capable of independently printing a single color. (Refer to the attached...) Figure 3 Each color base 1 is provided with a corresponding oven 12, which may be, but is not limited to, the top. After the film material is printed by the color base 1, it needs to enter the oven 12 to dry the printed part, so as to prevent the ink from sticking or dissolving and affecting the printing quality when entering the next color base 1. The above content can be easily understood by those skilled in the art, and will not be elaborated on here. In this embodiment, the mounting frame 2, inkjet printer 3, curing unit 4, and second guide roller 5 can be set on two adjacent color seats 1, two spaced color seats 1, three adjacent color seats 1, or three spaced color seats 1. Specifically, the settings can be adjusted according to the actual width of the color seat 1 along the second direction b and the width of the inkjet printer 3 along the second direction b. For example, if the printing width of the color seat 1 is 1.4m and the width of the inkjet printer 3 along the second direction b is 30cm, then a maximum of 4 inkjet printers 3 can be set on one color seat 1. If it is necessary to perform synchronous inkjet printing of 6 rows of icon patterns, three inkjet printers 3 can be set at intervals on one color seat 1 and another three inkjet printers 3 can be set on another color seat 1. Alternatively, two inkjet printers 3 can be set at intervals on one color seat 1, two inkjet printers 3 can be set on the second color seat 1, and two inkjet printers 3 can be set on the third color seat 1. It is not difficult to understand that in this embodiment, the first direction a can be the direction that is perpendicular to the ground and downwards in actual installation, the second direction b can be the direction that is parallel to the printing width of the color base 1, and the third direction c can be the direction that is parallel to the ground and perpendicular to both the first direction a and the second direction b, pointing from one color base 1 to another color base 1.

[0027] Among them, reference appendix Figure 4 and attached Figure 5 Mounting bracket 2 is a rigid structure, which can be in the form of a frame, cylinder, box, trough, etc., and its shape can be designed and adjusted according to the actual space requirements. For example, mounting bracket 3 can be, but is not limited to, […]. Figure 1 and attached Figure 3As shown, the rectangular cylindrical body with openings at both ends and the same width as the color base 1 improves the overall appearance consistency of the equipment. Of course, the mounting bracket 1 may not be the same width as the color base 1, or it may only correspond to the coding position, effectively reducing the material used in the mounting bracket 2 and the installation area, lowering installation difficulty, reducing manufacturing costs, and improving installation efficiency. Correspondingly, the first guide roller 21 can guide the packaging bag film 6 towards the coding printer 3, mainly serving as a transition and turning point between adjacent color bases 1, for example: see attached... Figure 3 After the printing of the previous color printing base 1 is completed, it needs to enter the oven 12 at its top for curing and drying. Therefore, the first guide roller 21 needs to be set between the mounting frame 2 and the oven 12 of the previous color printing base 1, so as to provide both directional and height transition. The two ends of the first guide roller 21 can be rotatably connected to the two inner walls of the mounting frame 2 that are opposite each other along the second direction b, or as follows: Figure 1 As shown, an additional guide roller frame 22 is provided above the mounting frame 2 to provide mounting positions for the first guide roller 21. The guide roller frame 22 can be a simple frame structure, as long as it can be connected to the color base 1 and provides mounting positions for the first guide roller 21 at both ends in the second direction b. The first guide roller 21 can be rigid or elastic. The radial dimensions of the first guide roller 21 can be designed and adjusted according to the actual needs of the width of the packaging bag film 6, which will not be elaborated further here.

[0028] In this embodiment, the installation position of the mounting bracket 2 can be adjusted according to the structural space of the color base 1. For example, referring to... Figure 1Except for the suspended position in the middle above the printing area 11, there is no suitable installation position on the color holder 1. Therefore, the mounting frame 2 can be set at this position to provide an installation position for the inkjet printer 3, located between the oven 11 and the printing area 11. The connection method between the mounting frame 2 and the color holder 1 can be, but is not limited to, welding, screwing, bracket snap-fit, etc., as long as the mounting frame 2 can be stably fixed on the color holder 1. Correspondingly, the inkjet printer 2 can also be connected to the inner wall of the mounting frame 2 by welding, screwing, etc., and the same applies to the curing unit 4, the first guide roller 21 and the second guide roller 5. Furthermore, it is easy to understand that the inkjet printer 2 provided in this embodiment can realize dynamic data processing. For example, it may include an embedded Linux operating system, enabling the inkjet printer 3 to receive and process dynamic data in real time, and correspondingly inkjet print the target pattern 61 to achieve one item, one code. The target pattern 61 may be, but is not limited to, a lottery QR code, traceability code, anti-counterfeiting label, personalized co-branded or limited edition text or pattern, serial number, date, etc. This setting is part of the working principle of the inkjet printer 3 that can be easily understood by those skilled in the art, and will not be elaborated here. Specifically, in this embodiment, one or more inkjet printers 3 on the same color base 1 can also be controlled to print different target patterns. For example, when the packaging bag film 6 is set to six target patterns for synchronous inkjet printing along the second direction b, there may be two identical and four different, three identical and three different, two identical in one group and three different in three groups, all six different, etc. Accordingly, in this embodiment, a controller 7 can be provided. The controller 7 can be a PLC controller capable of sending and receiving data commands, data analysis and processing, comparison, and program editing. The controller 7 can be set up separately for the inkjet printer 3 or it can be the controller of the gravure printing machine. Efficient inkjet printing can be achieved by preset inkjet printing control programs within the controller 7. For example, the controller 7 can cooperate with position detection to determine that the target area 62 of the packaging bag film 6 has reached the printhead of the inkjet printer 3. Then, the controller 7 controls the inkjet printer 3 to start and perform intermittent inkjet printing according to the preset inkjet printing frequency, so that the packaging bag film 6 can form a one-to-one target pattern 61 corresponding to multiple packaging bag positions. The controller 7 then controls the curing unit 4 to perform continuous curing and drying operations. This control program is easy to understand and implement by those skilled in the art, and will not be elaborated here. The preset generation rule of the target pattern can be preset in the controller 7. It can be regenerated in real time or updated at a fixed frequency. This setting is easy to understand and implement by those skilled in the art, and will not be elaborated here.

[0029] The curing unit 4 is positioned below the printhead 31, corresponding to the printhead 31. When the packaging bag film 6, printed with the target pattern 61, moves to the position of the curing unit 4, it can be cured. The curing unit 4 can be adjusted according to the type of ink used by the inkjet printer 3. For example, if the ink used by the inkjet printer 3 is UV-curable adhesive, the curing unit 4 can be a UV lamp. In this configuration, the curing unit 4 can be a continuous unit arranged along the second direction b. If the ink used by the inkjet printer 3 is thermosetting ink, the curing unit 4 can be a heating device such as an oven. If the ink used by the inkjet printer 3 is electron beam curing ink (EB, electron-beam), the curing unit 4 can be an electron beam curing device capable of emitting a high-energy electron beam. Of course, it is understandable that when the curing unit 4 is configured as an ultraviolet lamp or electron beam curing device, the packaging bag film 6 being printed is facing upwards, and the direction of curing should be downwards or tilted downwards. Therefore, in this embodiment, the packaging bag film 6 can be turned from the printhead 31 to the curing unit 4 so that the surface facing the printhead 31 being printed can be irradiated by the curing unit 4. The turning can be achieved by a guide roller, which will not be elaborated on here. In this embodiment, the curing unit 4 is set after the inkjet printer 3 so that the target pattern 61 can be cured and set immediately after being printed. Even after being guided by the second guide roller 5 and printed in the printing area 11, the integrity and clarity of the target pattern 61 can be guaranteed.

[0030] The second guide roller 5 can transition in direction and height between the curing unit 4 and the printing area 11. The two ends of the second guide roller 5 can be rotatably connected to the two inner walls opposite each other along the second direction b on the mounting frame 2. The second guide roller 5 can be rigid or elastic. The radial dimensions of the second guide roller 5 can be designed and adjusted according to the actual needs of the width of the packaging bag film 6, which will not be elaborated on here.

[0031] As described above, the printing equipment for forming packaging bag patterns provided in this embodiment uses a mounting frame 2 to mount a coding printer 3 on the color base 1 of the printing machine, enabling printing and coding to be completed in one go without changing workstations, greatly improving efficiency and effectively reducing the workload of operators. A curing unit 4 is also provided to quickly cure and shape the target pattern 61, ensuring that the target pattern 61 is stable before entering the printing area. At the same time, at least one coding printer 3 is set on each color base 1, so that the coding range of all coding printers 3 can cover the overall width range of the color base 1. Especially for packaging bag film materials 6 with a large width, this can avoid damage to the film material when changing operation positions, greatly improving printing efficiency and yield, and reducing cost.

[0032] Further, see attached document. Figure 5 In this embodiment, the printing equipment for forming packaging bag patterns is provided in which the inkjet printer 3 located on one of the color bases 1 and the inkjet printer 3 located on other color bases 1 are sequentially arranged along the second direction b on the third direction c; or the inkjet printer 3 located on one of the color bases 1 and the inkjet printer 3 located on other color bases 1 are alternately arranged along the second direction b on the third direction c.

[0033] It is understandable that, in order to make reasonable use of space, the setting position of the inkjet printer 3 on each color base 1 can be adjusted according to the actual space and cost situation in this embodiment; one approach is to arrange the inkjet printer 3 located on one of the color bases 1 and the inkjet printer 3 located on other color bases 1 sequentially along the second direction b, with their orthogonal projections on the third direction c. For example, refer to the attached diagram. Figure 5 Two inkjet printers 3 are consecutively set on one end of the first inkjet printer 1 in the second direction b, and two inkjet printers 3 are consecutively set on the other end of the second inkjet printer 1 in the second direction b. The arrangement of all inkjet printers 3 in the second direction b is two printers from the first inkjet printer 1 followed by two printers from the second inkjet printer 1. During printing, the first inkjet printer 1 prints the inkjet. Figure 7 The top two rows, the second color seat 1 is printed. Figure 7 The bottom two rows are arranged as follows. Another arrangement is that the inkjet printers 3 located on one of the color bases 1 and the inkjet printers 3 located on other color bases 1 are alternately arranged along the second direction b, with their orthogonal projections on the third direction c. For example, two inkjet printers 3 are spaced apart on the first color base 1 along the second direction b, and two inkjet printers 3 are spaced apart in the middle of the second direction b on the second color base 1. One inkjet printer 3 on the second color base 1 can correspond to the position between adjacent inkjet printers 3 on the first color base 1, and the other inkjet printer 3 can correspond to the side of the inkjet printer 3 on the first color base 1 that is away from the other inkjet printer 3. Yet another arrangement is a combination of the first two forms, i.e., random arrangement, as long as it covers the overall width of the color base 1.

[0034] Further, see attached document. Figure 1 The printing equipment for forming packaging bag patterns provided in this embodiment includes, in a specific implementation, a full-color LED ultraviolet curing ink for the inkjet printer 3; and an ultraviolet lamp for the curing unit 4.

[0035] Understandably, in order to save space and reduce costs, the ink used by the inkjet printer 3 in this embodiment can be configured as full-color LED ultraviolet curable ink. This type of ink can be used to print a variety of films, including but not limited to biaxially oriented polyethylene terephthalate film or biaxially oriented polyester film (BOPET), biaxially oriented polypropylene film (BOPP), polyamide or biaxially oriented nylon film (ONY), etc. Accordingly, the curing unit 4 is configured as a UV lamp. UV lamps are typically small in size and have no stringent requirements for irradiation direction and conditions. In this embodiment, they can be directly integrated into the mounting bracket 2. UV lamps have short curing times, and when curing LED UV inks, there is no solvent evaporation, eliminating the need for ventilation equipment and consumables. This simplifies the structure of the curing unit 4, saves installation space, and effectively reduces costs. Furthermore, in this embodiment, when the curing unit 4 is configured as a UV lamp, it can be set as a continuous unit along the second direction b, allowing for simultaneous irradiation of all packaging bag films 6 along the second direction b. This reduces the alignment accuracy requirements for irradiating each target pattern and improves efficiency. It is understood that the irradiation direction of the curing unit 4 in this embodiment can be either the opposite direction of the first direction a or at an angle to the first direction a, allowing for adaptive adjustments based on specific direction settings. It should be noted that the UV lamp-type curing unit 4 provided in this embodiment is constantly lit.

[0036] Further, see attached document. Figure 2 and attached Figure 7 The printing equipment for forming packaging bag patterns provided in this embodiment further includes an image acquisition unit 8 and a controller 7 in a specific implementation. The image acquisition unit 8 is disposed on the first direction a of the curing unit 4 in a one-to-one correspondence with the curing unit 4, and is used to acquire images of the target area 62 on the packaging bag film 6, on which the target pattern 61 is printed. The controller 7 is signal-connected to the image acquisition unit 8 and is used to determine the printing quality based on the image acquired by the image acquisition unit 7.

[0037] Understandably, to improve product quality and avoid secondary quality inspection, this embodiment includes an image acquisition unit 8 and a corresponding image processing unit within the controller 7, enabling online inspection of the integrity and clarity of the target pattern 61. The image acquisition unit 8 can be, but is not limited to, an industrial camera or a linear camera, etc., and can perform one-to-one image acquisition of the target patterns 61 spaced apart on the packaging bag film 6, or it can perform continuous acquisition. In this embodiment, when the curing unit 4 is a UV lamp continuously arranged along the second direction b, the image acquisition unit 8 can be set up one-to-one with the inkjet printer 3. The image processing unit can be, but is not limited to, Halcon image processing software, which can process the images acquired by the image acquisition unit 8. The detection accuracy can be, but is not limited to, 0.01mm; the image processing methods can be, but are not limited to, grayscale conversion, binarization, noise reduction, edge enhancement, edge feature extraction, region feature analysis, threshold segmentation, etc., to determine whether the target pattern 61 has missing parts, inconsistent ink concentration, or is unclear, etc. This setup is easily understood and implemented by those skilled in the art, and will not be elaborated upon here. In this embodiment, a statistical module can also be preset in the controller 7. When a quality problem is found in a target pattern 61 after image processing, it can be stored and marked according to the row and column positions to improve the efficiency of subsequent defective product selection. Alternatively, when a quality problem is found in a target pattern 61, the printing machine can be stopped and the alarm can be triggered to prompt the operator to manually mark it, for example, by drawing lines with colors different from those required for the product to improve the distinctiveness of subsequent defective product selection.

[0038] Further, see attached document. Figure 1 The printing equipment for forming packaging bag patterns provided in this embodiment further includes a third guide roller 23, a fourth guide roller 24, and a fifth guide roller 25 that rotate around the second direction b; the printhead 31 of the inkjet printer 3 extends along the first direction a; the third guide roller 23 and the fourth guide roller 24 are arranged at the same height and spaced apart along the third direction c on the first direction a of the printhead 31 to form a support flattening area 26, so that the packaging bag film 6 can form a printing flattening area between the third guide roller 23 and the fourth guide roller 24; the fifth guide roller 25 is disposed between the first guide roller 21 and the third guide roller 23 and is used to turn the packaging bag film 6 to the support flattening area 26; Wherein, the third direction c satisfies the perpendicular condition with both the first direction a and the second direction b.

[0039] It is understandable that, in order to ensure the coding effect, a third guide roller 23 and a fourth guide roller 24 are set in the coding direction corresponding to the printhead 31 in this embodiment. The specific setting of the third guide roller 23 and the fourth guide roller 24 can be referred to the second guide roller 5 and will not be described in detail here. It should be emphasized that in this embodiment, the third guide roller 23 and the fourth guide roller 24 can be spaced apart and set at the same height along the third direction c. That is, the third guide roller 23 and the fourth guide roller 24 are arranged on the same straight line along the third direction c, and their radial dimensions are the same. Thus, a support flattening area 26 can be formed in the area where they are spaced apart and at the same height as their roller surfaces. When the packaging bag film 6 moves to this area, it can be supported by the third guide roller 23 and the fourth guide roller 24 and a printing flattening area can be formed at the position of the corresponding support flattening area 26. The two ends of the printing flattening area along the third direction c are supported by the third guide roller 23 and the fourth guide roller 24, so that it can be kept taut. Thus, when the printhead 31 prints on it, there will be no problems such as displacement, misalignment, overlap, unclear or incompleteness of the target pattern 61 due to the sagging or wrinkles of the packaging bag film 6. Accordingly, the dimensions of the support flattening area 16 along the third direction c in this embodiment can be designed and adjusted according to actual needs. For example, it can be adjusted according to the coding requirements of different products. Taking instant noodle seasoning packets as an example, it is expected that a 2cm*5cm lottery QR code will be printed on them. Then the dimensions of the width direction of the color base 1, i.e., the second direction b, can correspond to the direction where the 5cm dimension is located. Then the third direction c needs to meet the printing size of at least 2cm. Therefore, the dimensions of the support flattening area 6 in the third direction c are at least 2cm to meet the product coding requirements. Of course, in this embodiment, at least one of the third guide roller 23 and the fourth guide roller 24 can be movably disposed on the mounting frame 2 along the third direction c, so that the size of the support flattening area 26 along the third direction c can be adjusted to adapt to the printing requirements of different products. For example, a groove extending along the third direction c can be provided on the inner wall of the mounting frame 2 opposite to the second direction b. The groove can accommodate the third guide roller 23 and / or the fourth guide roller 24, and a number of spaced positioning grooves are provided on the first direction a of the groove, so that the third guide roller 23 and / or the fourth guide roller 24 can be fixed in position in the third direction c and rotate around the second direction b in the positioning groove. It is easy to understand that when the guide roller 23 and / or the fourth guide roller 24 is to be adjusted to the support flattening area 16 with the target size, the guide roller 23 and / or the fourth guide roller 24 can be moved in the groove to the positioning groove of the corresponding target size.

[0040] Accordingly, in order to maintain the flatness of the support and flattening area 26, a fifth guide roller 25 can also be provided in this embodiment. The fifth guide roller 25 is positioned between the first guide roller 21 and the third guide roller 23. Specifically, the fifth guide roller 25 can be at the same height as the third guide roller 23, or it can be slightly higher than the third guide roller 23. The fifth guide roller 25 can also be located on the side of the first guide roller 21 opposite to the third direction c. Then, the packaging bag film 6 transmitted from the first guide roller 21 can be routed from the lower side of the fifth guide roller 25 to the upper side of the third guide roller 23. Thus, the fifth guide roller 25 can not only turn the packaging bag film 6 moving along the first direction a to move along the third direction c, but also tension the packaging bag film 6, causing it to be tensioned in the support and flattening area 16 to form a flat printing area. The fifth guide roller 25 can be rotatably mounted at both ends on the two inner walls of the mounting frame 2 opposite to each other along the second direction b, i.e. Figure 2 The state shown. The radial dimension of the fifth guide roller 25 can be designed and adjusted according to actual needs, for example, equal to the radial dimension of the third guide roller 23, to ensure synchronous transmission speed.

[0041] Further, see attached document. Figure 2 The printing equipment for forming packaging bag patterns provided in this embodiment further includes a sixth guide roller 27 in a specific implementation. The sixth guide roller 27 is rotatably disposed on the first direction a of the fifth guide roller 25 about the second direction b, and is used to form a curing irradiation area 28 between the fourth guide roller 24 and the sixth guide roller 27 corresponding to the curing unit 4. The fifth guide roller 25, the third guide roller 23 and the sixth guide roller 27 are distributed sequentially along the first direction a by the orthogonal projection of the third direction c.

[0042] It is understandable that when the curing unit 4 is located in the first direction a of the nozzle 31, the printed surface of the packaging bag film 6 is facing the opposite direction of the first direction a. Therefore, in order to irradiate and cure the curing unit 4 below, the printed surface needs to face the curing unit 4. To achieve curing irradiation, in this embodiment, a sixth guide roller 27 can be positioned directly opposite the fifth guide roller 25 in the first direction a, allowing the packaging bag film 6 transmitted from the upper side of the fourth guide roller 24 to pass over the upper side of the sixth guide roller 27. This ensures that the packaging bag film 6 between the fourth guide roller 24 and the sixth guide roller 27 not only undergoes a change in direction but also a significant transition in height. The sixth guide roller 27 can be located in the first direction a of the fifth guide roller 25, lower than the third guide roller 23. The sixth guide roller 27 can be rotatably mounted at both ends on the two inner walls of the mounting frame 2 opposite each other along the second direction b. Figure 2 The state is shown. The radial dimension of the sixth guide roller 27 can be designed and adjusted according to actual needs, for example, it can be equal to that of the third guide roller 23. For details, please refer to the appendix. Figure 2The packaging bag film 2 is printed with its face upward in the support and flattening area 26. Then, between the fourth guide roller 24 and the sixth guide roller 27, the printed surface turns downward or diagonally downward, thus facilitating upward irradiation by the curing unit 4. Simultaneously, after curing between the fourth guide roller 24 and the sixth guide roller 27, the target pattern 61, upon passing through the sixth guide roller 27 and entering the printing area 11, will not be affected by the sixth guide roller 27 in terms of printing quality, effectively ensuring and improving the printing effect. Correspondingly, after passing through the sixth guide roller 27, the packaging bag film 6 can be guided to the printing area 11. (Refer to the attached diagram.) Figure 3 In this embodiment, a seventh guide roller 10 and an eighth guide roller 101 can be configured in a cooperative manner. The seventh guide roller 10 is positioned on the first direction a of the sixth guide roller 27 and is located in the opposite direction c of the third direction of the sixth guide roller 27. The eighth guide roller 101 is positioned on the first direction a of the seventh guide roller 10 and is located in the opposite direction c of the third direction of the seventh guide roller 10. The packaging bag film 6 is wound from the lower side of the sixth guide roller 27 onto the seventh guide roller 10 in the third direction c, and then wound onto the eighth guide roller 101 in the opposite direction c of the third direction. After passing over the eighth guide roller 101, it is guided to the printing area 11 in the third direction c. The seventh guide roller 10 and the eighth guide roller 101 can be rotatably mounted on the color holder 1. The seventh guide roller 10 and the eighth guide roller 101 can be rigid rollers or rollers with a certain degree of elasticity. The radial dimension of the seventh guide roller 10 and the eighth guide roller 101 can be larger than the radial dimension of the sixth guide roller 27, thereby increasing the speed at which the packaging bag film 6 is guided to the printing area 11.

[0043] Further, see attached document. Figure 3 The printing equipment for forming packaging bag patterns provided in this embodiment further includes a tension roller 9 in a specific implementation; the tension roller 9 is disposed between the first guide roller 21 and the fifth guide roller 25, and the tension roller 9 is located on the third direction c of the fifth guide roller 25. The tension roller 9 is rotatably disposed around the second direction b to tension the packaging bag film material 6.

[0044] Understandably, to improve the tension of the packaging bag film 6 in the support and flattening area 26, a tension roller 9 can be provided in this embodiment. The tension roller 9 can transition in height and direction between the first guide roller 21 and the fifth guide roller 25. The packaging bag film 6 from the first guide roller 21 can travel around to the lower side of the fifth guide roller 25 via the third direction c of the tension roller 9. Since the tension roller 9 is located in the opposite direction c of the fifth guide roller 25, it can effectively tension the packaging bag film 6, effectively improving the tension of the packaging bag film 6 in the support and flattening area 26 and ensuring the printing effect. The tension roller 9 can be a rigid roller or a roller with a certain degree of elasticity. The radial dimension of the tension roller 9 can be larger than the radial dimension of the fifth guide roller 25, increasing the rate of turning and height transition of the packaging bag film 6.

[0045] Further, see attached document. Figure 2 and attached Figure 6 The printing equipment for forming packaging bag patterns provided in this embodiment further includes a position sensor 102 in a specific implementation. The position sensor 102 is disposed on the mounting frame 2 and is signal-connected to the controller 7 to detect the position of the packaging bag film 6 and transmit it to the controller 7. The controller 7 can control the start and stop of the inkjet printer 3 according to the position of the packaging bag film 6.

[0046] Understandably, in order to achieve automated control of the inkjet printer 3 in conjunction with the gravure printing machine and avoid disrupting the rhythm of the gravure printing machine, a position sensor 102 can be set in this embodiment. The position sensor 102 detects the position of the packaging bag film 6, so that the controller 7 can control the inkjet printer 3 in a timely and accurate manner, ensuring that the target pattern 61 can be printed in the correct target area 62, for example, referring to the attached figure. Figure 7 As shown, the QR code is located within the square frame. The position sensor 102 can be, but is not limited to, a data acquisition encoder; see attached diagram. Figure 2 In this embodiment, it can be positioned below the fifth guide roller 25, allowing it to detect the rotational speed of the fifth guide roller 25 and convert it into an electrical signal sent to the controller 7. The controller 7 calculates and determines the distance the packaging bag film 6 has traveled after passing the fifth guide roller 15 based on this signal, and uses the distance between the fifth guide roller 25 and the third guide roller 23 to determine whether the inkjet printer 3 needs to be activated. For example, if the diameter of the fifth guide roller 25 is 20cm and the distance between the fifth guide roller 25 and the third guide roller 23 is 50cm, then the fifth guide roller 25 will rotate 8 times to reach the position of the third guide roller 23. Therefore, when the entire system is in operation, if the encoder detects that the fifth guide roller 25 has rotated 8 times, it means that the packaging bag film 6 has reached the support and flattening area 26, and then... The controller 7 can control the inkjet printer 3 to start printing. Of course, it can also be further precisely adjusted according to the position of the target area 62 where the target pattern 61 is located on the packaging bag film 6. For example, if the area corresponding to a packaging bag is 8cm, and the target area 62cm is 8cm, it is close to the next packaging bag in the direction of travel. The interval between adjacent packaging bags is 3cm. Then, the controller 7 can control the inkjet printer 3 to print when the fifth guide roller 25 rotates 8 times (the distance between the fifth guide roller 25 and the third guide roller 23) + 1 time (the distance between the edge of the 2cm and 8cm target areas) + 0.5 times (the interval between adjacent packaging bags). That is, when the fifth guide roller 25 rotates 9.5 times, the controller 7 can control the inkjet printer 3 to print. The above content can be easily understood by those skilled in the art, and will not be elaborated on here.

[0047] Example 2 The packaging bag production system provided in this embodiment includes at least one printing device for forming packaging bag patterns. The printing device includes at least two color seats 1, mounting frames 2 corresponding to each color seat 1, at least two inkjet printers 3, curing units 4 corresponding to each inkjet printer 3, and a second guide roller 5. The at least two color seats 1 are arranged side-by-side and spaced apart along a third direction c. The mounting frame 2 is fixed to the color seats 1 and has an inlet and an outlet opposite each other along a first direction a. A first guide roller 21 rotating about a second direction b is provided at the inlet to receive packaging bag film 6 from adjacent color seats 1. The at least two inkjet printers 3 are configured corresponding to the at least two color seats 1, and the inkjet printers 3 are positioned on the mounting frame 2 corresponding to the outlet. For printing the target pattern 61 onto the packaging bag film 5, the inkjet printers 3 located on at least two of the color bases 1 are spaced apart along the second direction b, with their orthogonal projection along the third direction c, so that the printing range of the inkjet printers 3 located on at least two of the color bases 1 can be adapted to the printing width of the color base 1; the curing unit 4 is arranged in the first direction a of the inkjet printer 3 corresponding to the printhead of the inkjet printer 3, and is used to dry the target pattern 61 on the packaging bag film 6; the second guide roller 5 is arranged on the color base 1 in the first direction a of the curing unit 4, and the second guide roller 5 is rotatably arranged around the second direction b, and is used to receive and guide the packaging bag film 6 from the curing unit 4 to the printing area 11 of the color base 1; Wherein, the first direction a is perpendicular to the horizontal plane, and the second direction b and the third direction c are both perpendicular to the first direction a.

[0048] It is understood that the printing equipment for forming packaging bag patterns provided in this embodiment is the same as the printing equipment for forming packaging bag patterns described in Embodiment 1. For its specific structure and working principle, please refer to the detailed description of Embodiment 1, which will not be repeated here.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A printing apparatus for forming patterns on packaging bags, characterized in that, It includes: At least two color seats, wherein the at least two color seats are arranged side by side and spaced apart along a third direction; Mounting frame, which is fixedly connected to the color holder in a one-to-one correspondence. The mounting frame has an inlet and an outlet opposite each other in a first direction. The inlet is provided with a first guide roller that rotates about a second direction for receiving packaging bag film material from the adjacent color holder. At least two inkjet printers are configured corresponding to at least two of the aforementioned color bases. The inkjet printers are positioned on the mounting frame corresponding to the outlet and are used to print target patterns onto the packaging bag film. The inkjet printers located on the at least two color bases are spaced apart along the second direction when their orthogonal projection along a third direction is along the third direction, so that the printing range of the inkjet printers located on the at least two color bases can be adapted to the printing width of the color base. A curing unit is provided, which corresponds one-to-one with the inkjet printer and is positioned in the first direction of the inkjet printer to correspond to the printhead of the inkjet printer, for drying the target pattern on the packaging bag film. The second guide roller is disposed on the color holder in a first direction of the curing unit and rotates around the second direction to receive and guide the packaging bag film from the curing unit to the printing area of ​​the color holder. Wherein, the first direction satisfies the condition of being perpendicular to the horizontal plane, and the second direction and the third direction both satisfy the condition of being perpendicular to the first direction.

2. The printing equipment for forming a pattern on a packaging bag according to claim 1, characterized in that: The inkjet printer located on one of the color holders and the inkjet printers located on the other color holders are arranged sequentially along the second direction in terms of their orthogonal projections in the third direction; or The inkjet printer located on one of the color holders and the inkjet printers located on the other color holders are alternately arranged in the second direction along the third direction in their orthogonal projection.

3. The printing equipment for forming a pattern on a packaging bag according to claim 1, characterized in that: The inkjet printer is equipped with full-color LED ultraviolet curable ink; The curing unit includes an ultraviolet lamp.

4. The printing equipment for forming a pattern on a packaging bag according to claim 1, characterized in that: It also includes an image acquisition unit and a controller; The image acquisition unit and the curing unit are respectively arranged in the first direction of the curing unit to acquire the image of the target area on the packaging bag film, and the target area is printed with the target pattern; The controller is signal-connected to the image acquisition unit and is used to determine the printing quality based on the image acquired by the image acquisition unit.

5. The printing equipment for forming a pattern on a packaging bag according to claim 1, characterized in that: It also includes a third guide roller, a fourth guide roller, and a fifth guide roller that rotate about the second direction; The printhead of the inkjet printer extends along the first direction; The third guide roller and the fourth guide roller are arranged at the same height and spaced apart along the third direction in the first direction of the printhead to form a support and flattening area, so that the packaging bag film material can form a printing flat area between the third guide roller and the fourth guide roller; The fifth guide roller is disposed between the first guide roller and the third guide roller, and is used to turn the packaging bag film to the support flattening area.

6. The printing equipment for forming a pattern on a packaging bag according to claim 5, characterized in that: It also includes the sixth guide roller; The sixth guide roller is rotatably disposed on the first direction of the fifth guide roller around the second direction, and is used to form a curing irradiation area between the fourth guide roller and the sixth guide roller corresponding to the curing unit; The fifth guide roller, the third guide roller, and the sixth guide roller are sequentially distributed along the first direction by their orthogonal projections along the third direction.

7. The printing equipment for forming a pattern on a packaging bag according to claim 5, characterized in that: It also includes tension rollers; The tension roller is disposed between the first guide roller and the fifth guide roller, and the tension roller is located in the third direction of the fifth guide roller. The tension roller is rotatably disposed around the second direction for tensioning the packaging bag film.

8. The printing equipment for forming a pattern on a packaging bag according to claim 5, characterized in that: The third guide roller and / or the fourth guide roller are movably disposed on the mounting frame along the third direction to adjust the size of the support flattening area.

9. The printing equipment for forming a pattern on a packaging bag according to claim 3, characterized in that: It also includes a position sensor; The position sensor is mounted on the mounting frame and is signal-connected to the controller to detect the position of the packaging bag film and transmit it to the controller. The controller can control the start and stop of the inkjet printer according to the position of the packaging bag film.

10. A packaging bag production system, characterized in that, It includes: At least one printing device for forming a pattern on a packaging bag, the printing device for forming the pattern on the packaging bag comprising: At least two color bases; Mounting frame, which is fixedly connected to the color holder in a one-to-one correspondence. The mounting frame has an inlet and an outlet opposite each other in a first direction. The inlet is provided with a first guide roller that rotates about a second direction for receiving packaging bag film material from the adjacent color holder. At least two inkjet printers are configured corresponding to at least two of the aforementioned color seats. The inkjet printers are positioned on the mounting frame corresponding to the outlet and are used to print target patterns onto the packaging bag film. The inkjet printers located on the at least two color seats are sequentially arranged along the second direction with their orthogonal projection along a third direction, so that the printing range of the inkjet printers located on the at least two color seats can be adapted to the printing width of the color seats. A curing unit is provided, which corresponds one-to-one with the inkjet printer and is positioned in the first direction of the inkjet printer to correspond to the printhead of the inkjet printer, for drying the target pattern on the packaging bag film. The second guide roller is disposed on the color holder in a first direction of the curing unit and rotates around the second direction to receive and guide the packaging bag film from the curing unit to the printing area of ​​the color holder. Wherein, the first direction satisfies the condition of being perpendicular to the horizontal plane, and the second direction and the third direction both satisfy the condition of being perpendicular to the first direction.

Images