Double-sided printer and printing method thereof

Abstract

The invention discloses a double-sided printer and a double-sided printing method. The double-sided printer comprises a feeding module, a receiving module, a driving roller and a printing integration module, wherein the driving roller and the printing integration module are located between the feeding module and the receiving module; the printing integrated module comprises a printing platform and a printing cross beam, the printing platform and the printing cross beam are arranged in a penetrating mode, and a penetrating part for a printing medium to penetrate through is arranged at the position, penetrating through the printing cross beam, of the printing platform. The two printing trolleys and the printing table top form a printing integrated module, the two printing trolleys share one cross beam structure, the printing table top shares one printing platform structure, and the integrated printing platform and the printing cross beam structure are compact and simple in structure, convenient to maintain and calibrate, easy and convenient to assemble and debug and low in failure rate.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and in particular to a double-sided printer and a printing method thereof. Background Art

[0002] A double-sided printer or inkjet printer is a device that can perform inkjet printing on both sides of the printing material at the same time. It combines the high efficiency and environmental protection of printing technology with the convenience of double-sided printing, and is widely used in advertising, decoration, packaging and other fields. For example, the LANQI RG3300PRO double-sided UV printer is equipped with an AI double-sided printing system to achieve multi-point data collection and precise alignment, without too much manual intervention, simple operation, and save materials and labor. It is widely used in the production of signs, POP products, advertising products, exhibition props, decorative oil paintings, leather products, 3D decorative paintings, photo frames, wedding images, etc. This type of printer can print on materials such as acrylic, KT board, PVC, organic board, stainless steel, aluminum-plastic board, etc., with bright colors, clear details and strong durability. The existing digital double-sided inkjet printer has the advantages of fast printing speed, high efficiency, no need for plate making, fast printing and low cost, which can meet customers' requirements for image effects, and achieve one-piece printing, various complex pattern painting, 3D relief stereoscopic and other effects. In case of UV double-sided printing technology, its UV ink is environmentally friendly, contains no volatile organic solvents, and reduces pollution. Double-sided UV printers are gradually becoming an ideal choice for advertising, decoration, packaging and other fields due to their advantages such as high efficiency, environmental protection, high color reproduction and applicability to multiple materials.

[0003] CN214646932U discloses a double-sided printer, which is provided with two printing platforms, respectively used to print the front and back sides of the paper. In actual use, the utilization rate of the two platforms of this design is not balanced, and the two platforms need to be maintained and calibrated separately, which increases the maintenance cost and operation complexity. Moreover, the two printing carriages are each equipped with an independent crossbeam, which makes the overall structure of the printer more complicated and increases the number of parts. During the assembly and debugging process, more time and energy are required to ensure the precise matching of each component. At the same time, the increase in the crossbeam also increases the size of the printer, occupies more space, and is not conducive to the miniaturization and portability of the printer. The complex structure means higher manufacturing costs, including the procurement of raw materials, the processing of parts and components, and the cost of assembly. In addition, the complexity of the structure will also reduce the reliability and stability of the printer, increase the probability of failure, such as deformation of the crossbeam, jamming of the printing carriage, etc., affecting the printing quality and user experience.

[0004] Based on this, how to provide a new type of double-sided printer with simplified structure, reduced cost, and improved reliability, so as to better meet market demand, is a technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a double-sided printer to simplify the structure, reduce the volume, reduce the cost and improve the product reliability. The printing platform and printing beam structure are staggered and cross-arranged, and two printing carriages share a beam structure, and the printing table shares a printing platform structure. Not only is the structure compact and simple, but it is also easy to maintain and calibrate, easy to assemble and debug, and has a low failure rate. In addition, the present invention also provides a double-sided printing method using the double-sided printer.

[0006] To achieve the above object, the present invention provides a double-sided printer, characterized in that it comprises: a material discharging module, a material receiving module, a driving roller located between the material discharging module and the material receiving module, and a printing integrated module;

[0007] Further preferably, the unloading module includes an unloading roller and an unloading guide roller, and the receiving roller includes a receiving roller and a receiving guide roller;

[0008] Further preferably, the driving roller comprises a first driving roller and a second driving roller;

[0009] Further preferably, the printing integrated module comprises a printing platform and a printing beam, the printing platform and the printing beam are mutually interpenetrated, and a guide portion for a printing medium to pass through is arranged on the printing platform where the printing platform passes through the printing beam, and the opposite guide portions of the printing platform or the two sides of the printing beam are respectively the first printing table and the second printing table; the two sides of the printing beam are loaded with the first printing module and the second printing module through the beam track;

[0010] Further preferably, the first printing module corresponds to the first printing table and prints on the first side of the printing medium, and the second printing module corresponds to the second printing table and prints on the second side of the printing medium.

[0011] Further preferably, the first printing surface and the second printing surface are respectively located on different surfaces of the printing platform, and the first printing surface and the second printing surface are located on both sides of the penetration portion of the printing platform.

[0012] Further preferably, the guide block with an arc-shaped structure is provided at the beginning and end contact portions of the threading portion relative to the printing medium.

[0013] Further preferably, the printing platform and the printing beam are arranged to intersect each other in a cross shape, or the printing platform and the printing beam are arranged to intersect each other in an X-shaped cross shape.

[0014] Further preferably, the first printing table and the second printing table are both water-cooled printing tables.

[0015] Further preferably, there is only one printing platform in the printing integrated module, there is only one printing beam in the printing integrated module, the only one printing platform and the only one printing beam are cross-arranged with each other, or the only one printing platform and the only one printing beam are cross-arranged with each other in an X-shape.

[0016] Further preferably, a first printing inkjet carriage is provided in the first printing module, the first printing inkjet carriage is arranged on a beam track on one side of the printing beam, the first printing inkjet carriage corresponds to the first printing table and performs reciprocating printing on the first side of the printing medium along the side beam track, and a second printing inkjet carriage is provided in the second printing module, the second printing inkjet carriage is arranged on the beam track on the other side of the printing beam, the second printing inkjet carriage corresponds to the second printing table and performs reciprocating printing on the second side of the printing medium along the side beam track.

[0017] Further preferably, the first printing module is provided with a first distance adjustment structure for adjusting the distance between the first printing inkjet carriage and the first printing table; the second printing module is provided with a second distance adjustment structure for adjusting the distance between the second printing inkjet carriage and the second printing table.

[0018] Further preferably, it also includes a first tensioning roller located on the first driving roller side, a second tensioning roller on the second driving roller side, and also includes an adjustment drive unit for adjusting the distance between the first tensioning roller and the first driving roller and an adjustment drive unit for adjusting the distance between the second tensioning roller and the second driving roller. The adjustment drive units are all arranged on the printer frame through an adjustment base.

[0019] The present invention also provides a double-sided printing method, characterized in that the double-sided printer as described above is used, and the printing method comprises the following steps:

[0020] S1: Arrange the printing medium: place the printing medium between the feeding roller and the receiving roller of the cloth feeding path of the double-sided printer, and sequentially pass through the first tensioning roller, the first driving roller, the printing integrated module, the second driving roller, and the second tensioning roller; the printing medium is attached to the first printing table in the printing integrated module, and then passes through the threading part and then attaches to the second printing table to pass out;

[0021] S2 sets printing parameters: according to the double-sided pattern alignment requirements of the printing medium, adjusts the first printing alignment position of the first printing inkjet carriage on the first printing table and the second printing alignment position of the second printing inkjet carriage on the second printing table; the first printing alignment position and the second printing alignment position are the same alignment position on both sides of the printing medium;

[0022] S3 adjusts printing parameters: prints reference mark image A at the edge of the first side of the printing medium by the first printing inkjet carriage, and according to the second printing alignment position parameters obtained in step S, when the reference mark image A of the printing medium reaches a relative second printing alignment position, prints reference mark image A' at the edge of the second side of the printing medium by the second printing inkjet carriage, obtains the alignment position difference between reference mark images A and A', and adjusts the second printing alignment position parameters according to the alignment position difference, so that the first printing alignment position is aligned with the second printing alignment position.

[0023] S4 completes printing: repeat step S according to the interval period, repeatedly print multiple reference mark images A at the edge of the first side of the printing medium, and repeatedly print multiple reference mark images A' at the edge of the second side of the printing medium according to the second printing alignment position parameter, obtain the alignment position difference between the multiple reference mark images A and A', and adjust the second printing alignment position parameter according to the alignment position difference, so that the first printing alignment position is aligned with the second printing alignment position during the printing process until printing is completed.

[0024] The double-sided printer of the present invention adopts a printing platform and a printing beam structure that are staggered and cross-arranged with each other, and the two form a printing integrated module. The relative accuracy of the printing platform and the printing beam can be pre-assembled and calibrated before the whole machine is installed; it can also be disassembled for installation, and the assembly and debugging methods are relatively flexible. Since two printing inkjet carriages share a beam structure, the relative position accuracy of the two printing inkjet carriages is relatively high and the error is small, and the printing tables share a printing platform structure, the relative position accuracy of the two printing tables is relatively high and the printing error is small. The integrated printing platform and printing beam structure are not only compact and simple in structure, but also easy to maintain and calibrate, simple to assemble and debug, and have a low failure rate.

[0025] The structural design of the material discharging module and the material receiving module in the present invention is also quite ingenious. The material discharging roller is installed on the material discharging frame, and the rotational resistance of the material discharging roller can be adjusted, so as to facilitate the synchronous material discharging with the subsequent first driving roller. The material receiving roller is installed on the material receiving frame, and the rotational resistance of the material receiving roller can be adjusted, so as to facilitate the synchronous material receiving with the previous second driving roller. The discharged printing medium shall enter the first driving roller after being guided by the material discharging guide roller group. The material discharging guide roller can guide the printing medium well, and cooperate smoothly with the material discharging roller and the first driving roller of the front and rear processes, so that the printing medium can flow stably and smoothly to the first driving roller. The material discharging guide roller group includes at least one material discharging guide roller. In the actual equipment, one or more material discharging guide rollers can be set according to the specifications of the printer and the material of the printing medium to achieve stable and smooth flow. The rolled-up printed printing medium must be driven out by the second driving roller, and then enter the receiving roller after guiding treatment by the receiving guide roller group. The receiving guide roller can guide the printed printing medium very well, and cooperate smoothly with the second driving roller and the receiving roller in the front and rear processes, so that the printed printing medium can flow stably and smoothly to the receiving roller. The receiving guide roller group includes at least one receiving guide roller. In actual equipment, one or more receiving guide rollers can be set according to the specifications of the printer and the material of the printing medium to achieve stable and smooth flow and collection of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the printing structure arrangement of a double-sided printer provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of a printing integrated module in a double-sided printer provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a material discharging module in a double-sided printer provided by an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the arrangement structure of a printing beam and a printing platform in a double-sided printer provided by an embodiment of the present invention;

[0031] Figure 5 The present invention provides a schematic diagram of the overall three-dimensional structure of a double-sided printer provided in an embodiment of the present invention.

[0032] Among them: 001 printing medium; 100 unloading module; 110 unloading roller; 120 unloading rack; 130 unloading guide roller group; 131 unloading guide roller; 200 collecting module; 210 collecting roller; 220 collecting rack; 231 collecting guide roller; 300 first tensioning roller; 400 first driving roller; 600 printing integrated module; 700 second tensioning roller; 800 second driving roller; 310 adjusting base; 320 adjusting driving part; 600 printing integrated module; 610 printing platform; 611 first printing table; 612 second printing table; 613 threading part; 614 guide block; 620 first printing module; 621 first printing inkjet carriage; 630 second printing module; 631 second printing inkjet carriage; 640 printing beam. DETAILED DESCRIPTION

[0033] The core of the present invention is to provide a double-sided printer to simplify the printer structure, reduce the size, reduce the cost and improve the product reliability. The present invention also provides a double-sided printing method using the double-sided printer.

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0035] Embodiment 1:

[0036] Please refer to Figures 1 to 5A double-sided printer disclosed in the present invention is characterized in that it includes: a feeding module 100, a receiving module 200, and a driving roller and a printing integrated module 600 located between the feeding module 100 and the receiving module 200; the driving roller includes a first driving roller 400 and a second driving roller 800; the feeding module 100 includes a feeding roller 110, the feeding roller 110 is installed on the printer frame through a feeding rack 120, and an adjusting structure for adjusting the tightness of the feeding roller 110 is provided on the feeding rack 120 to adjust the rotation resistance of the feeding roller 110, so as to facilitate synchronous feeding with the subsequent first driving roller 400, and the receiving roller 210 is installed on the printer frame through a feeding rack 220, and an adjusting structure for adjusting the tightness of the receiving roller 210 is provided on the receiving rack 220 to adjust the rotation resistance of the receiving roller 210, so as to facilitate synchronous feeding with the previous second driving roller 800. The unprinted printing medium 001 is rolled up in the feeding roller 110 in the feeding module 100, and then driven by the first driving roller 400 in the driving roller, and double-sided printing is performed by the printing integrated module 600, and then driven by the second driving roller 800 in the driving roller to be pulled to the receiving roller 210 in the receiving module 200, completing the printing single process. During printing, the controller controls the rotation driving parameters of the first driving roller 400 and the second driving roller 800, thereby controlling the feeding speed to be stable and appropriate, and the controller controls the printing integrated module 600 to print on the front and back sides of the printing medium 001 passing therethrough.

[0037] As a further detailed description of this embodiment, the unloading module 100 includes an unloading roller 110 and an unloading guide roller 131, and the receiving roller 200 includes a receiving roller 210 and a receiving guide roller 231; Figure 1 or attached Figure 3 In the embodiment, the number of the material discharge guide roller 131 and the material receiving guide roller 231 is at least one, the at least one material discharge guide roller 131 constitutes a material discharge guide roller group 130, and the at least one material receiving guide roller 231 constitutes a material receiving guide roller group. The number of the material discharge guide roller 131 or the material receiving guide roller 231 in the preferred scheme of this embodiment is preferably 2, but is not limited to 2, and can be set to 1, 2, or more according to the overall size of the printer and the material of the printing medium, as long as it can play a good guiding effect.

[0038] As a further detailed description of this embodiment, the printing integrated module 600 includes a printing platform 610 and a printing beam 640, the printing platform 610 and the printing beam 640 are arranged to cross each other, and a guide portion 613 for the printing medium 001 to pass through is provided on the printing platform 611 where the printing platform 610 passes through the printing beam 640, and the two sides of the opposite guide portion 613 of the printing platform 610 or the printing beam 640 are respectively the first printing table 611 and the second printing table 612; the two sides of the printing beam 640 are loaded with the first printing module 620 and the second printing module 630 through the beam track; as shown in the attached Figure 2 or attached Figure 4 As shown in , the printing platform 610 is arranged longitudinally, and the printing beam 640 is arranged transversely, and the printing platform 610 passes through the middle of the printing beam 640. Of course, it can be arranged that the printing beam 640 passes through the middle of the printing platform. Any technical solution that can realize the cross-penetration of the two and reserve the guide portion 613 of the printing platform 610 is sufficient. This embodiment does not make specific restrictions, but any technical solution that cross-penetrates the integrated printing platform 610 and the integrated printing beam 640 is within the protection scope of this solution. The guide portion 613 for the printing medium 001 to pass through is a cavity portion relative to the body of the printing platform 610. The guide portion 613 formed by the cavity portion is for the purpose of allowing the printing medium 001 to pass through and change the surface, so as to realize the printing of both sides of the printing medium 001 and flipping out different printing surfaces. The shape and size of the guide portion 613 are not specifically limited, and it is sufficient to realize that the printing medium 001 can be flipped through the guide portion 613 to have different printing surfaces. The first printing surface of the printing medium 001 is laid on the first printing table 611, and the first printing inkjet carriage 621 in the first printing module 620 corresponds to the first printing table 611 and prints on the first surface of the printing medium 001. After the first surface is printed, the printing medium 001 passes through the guide portion 613 and is laid on the second printing table 612 to form a second printing surface. The second printer inkjet carriage 631 in the second printing module 630 corresponds to the second printing table 612 and prints on the second surface of the printing medium 001. That is, through the cooperation of the two different first printing tables 611, the second printing table 612 and the guide portion 613 of the printing platform 610, different surfaces of the printing medium 001 are actually printed on one printing platform 612. Moreover, Figure 2 It can be clearly seen that the first printing table 611 and the second printing table 612 are respectively located on different surfaces of the printing platform 610, and the first printing table 611 and the second printing table 612 are located on both sides of the lead-in portion 613 of the printing platform 610.

[0039] As for the threading portion 613, as a further detailed description of this embodiment, the threading portion 613 is provided with an arc-shaped guide block 614 at the beginning and end contact portions relative to the printing medium 001. Figure 2 In the embodiment, the upper and lower parts of the threading part 613 are both provided with guide blocks 614. After the printing medium 001 is printed on the first printing table 611, it enters the threading part 613 along the upper guide block 614 and enters the second printing table 612 along the lower guide block 614. The setting of the guide block 614 makes the printing material 001 turn over more smoothly and smoothly without getting stuck or wrinkled. In addition, the upper and lower ends of the printing platform 610 have a turning relationship with the printing material. The upper and lower ends of the printing receipt 60=10 can be provided with arc chamfers, or a guide block 614 structure can also be provided, so as to facilitate the printing medium 001 to be smoothly guided from the first driving roller 400 to the first printing table 611 of the printing platform 610, and also facilitate the printing medium 001 to be smoothly guided from the second printing table 612 of the printing platform 610 to the second driving roller 800.

[0040] More specifically, as a further detailed description of this embodiment, as shown in the attached Figure 2 In the embodiment, the printing platform 610 and the printing beam 640 are arranged crosswise and mutually interpenetrating, or the printing platform 610 and the printing beam 640 are arranged crosswise and mutually interpenetrating in an X-shaped manner. The specific crosswise interpenetrating angle can be set arbitrarily, such as 30°, 45°, 60°, etc. In this solution, the first printing table 611 and the second printing table 612 are both water-cooled printing tables. Of course, one of the multiple methods such as water cooling, air cooling, heating and drying can also be adopted according to different printing media. Any method that can dry and solidify the printed substrate 001 can be used. For example, if the printing medium 001 in this solution is UV cloth, water cooling is preferred.

[0041] It needs to be emphasized again that there is only one printing platform 610 in the printing integrated module 600, there is only one printing beam 640 in the printing integrated module 600, the one printing platform 610 and the one printing beam 640 are arranged in a cross shape and intersect each other, or the one printing platform 610 and the one printing beam 640 are arranged in an X-shaped cross shape and intersect each other. In a conventional printer, generally, in order to print on both sides of the printing medium 001, two independent printing platforms 610 are required to be configured for printing on different sides of the printing medium 001. Furthermore, since the two independent printing platforms 610 need to be equipped with two independent printing beams 640, which are used to carry two printing inkjet carriages facing each other for printing separately. This solution obviously realizes printing on both sides of the printing medium 001 through a printing platform 610, and obviously sets different printing inkjet carriage running tracks on both sides of a printing beam 640, and loads the two printing inkjet carriages on the same installation reference, which has high relative assembly accuracy and alignment accuracy, simpler structure, convenient assembly and low cost. Regarding the printing module in this embodiment, a first printing inkjet carriage 621 is provided in the first printing module 620, and the first printing inkjet carriage 621 is arranged on a beam track on one side of the printing beam 640 ( Figure 2 The first printing inkjet carriage 621 corresponds to the first printing table 611 and reciprocates along the side beam track on the first side of the printing medium 001. The second printing module 630 is provided with a second printing inkjet carriage 631, which is arranged on the other side beam track of the printing beam 640 ( Figure 2 The second printing inkjet carriage 631 corresponds to the second printing table 612 and reciprocates along the side crossbeam track to print on the second side of the printing medium 001. The first printing module 620 is provided with a first distance adjustment structure (not shown in the figure) for adjusting the distance between the first printing inkjet carriage 621 and the first printing table 611; the second printing module 630 is provided with a second distance adjustment structure (not shown in the figure) for adjusting the distance between the second printing inkjet carriage 631 and the second printing table 612. The first distance adjustment structure and the second distance adjustment structure are conventional distance adjustment structures, and will not be described in detail in this embodiment.

[0042] Due to the difference in the printing medium 001, especially the difference in thickness, the printing medium 001 is not prevented from sliding relative to the first driving roller 400 and the second driving roller 800, resulting in misaligned printing. The present solution also includes a first tensioning roller 300 located on the side of the first driving roller 400 and a second tensioning roller 700 located on the side of the second driving roller 800. The gap between the first tensioning roller 300 and the first driving roller 400 is based on the thickness of the printing medium 001, so that the first tensioning roller 300 and the first driving roller 400 can clamp the printing medium 001 with each other and continue to clamp the printing medium 001 under the rotation drive of the first driving roller 400 to send it to the next process. The second tensioning roller 700 is the same and will not be described here. In addition, due to the different thicknesses of the printing medium 001, an adjustment drive unit 320 for adjusting the distance between the first tensioning roller 300 and the first driving roller 400 and an adjustment drive unit 320 for adjusting the distance between the second tensioning roller 700 and the second driving roller 800 are also included. The adjustment drive units 320 are both arranged on the printer frame through an adjustment base 310. The adjustment drive units 320 are common electric, pneumatic, and cylinder adjustment structures, which will not be described in detail here; the purpose is to make the first tensioning roller 300 or the second tensioning roller 700 move away from or close to the first driving roller 400 or the second driving roller 800, thereby adjusting the distance between the two.

[0043] Embodiment 2:

[0044] A double-sided printing method, characterized in that the double-sided printer as described in the first embodiment is used, and the printing method comprises the following steps:

[0045] S1: arranging the printing medium: placing the printing medium 001 between the feeding roller 110 and the receiving roller 210 of the cloth feeding path of the double-sided printer, and sequentially passing through the first tensioning roller 300, the first driving roller 400, the printing integrated module 600, the second driving roller 800, and the second tensioning roller 700; the printing medium 001 is attached to the first printing table 611 in the printing integrated module 600, and then passes through the threading portion 613 and then attaches to the second printing table 612 to pass out;

[0046] S2 sets printing parameters: according to the double-sided pattern alignment requirement of the printing medium 001, adjusts the first printing alignment position of the first printing inkjet carriage 621 on the first printing table 611 and the second printing alignment position of the second printing inkjet carriage 631 on the second printing table 612; the first printing alignment position and the second printing alignment position are the same alignment position on both sides of the printing medium 001;

[0047] S3 adjusts printing parameters: prints reference mark image A at the edge of the first side of printing medium 001 by the first printing inkjet carriage 621, and according to the second printing alignment position parameters obtained in step S2, when reference mark image A of printing medium 001 reaches the second printing alignment position relative to the reference mark image A' at the edge of the second side of printing medium 001 by the second printing inkjet carriage 631, obtains the alignment position difference between reference mark images A and A', and adjusts the second printing alignment position parameters according to the alignment position difference, so that the first printing alignment position is aligned with the second printing alignment position.

[0048] S4 completes printing: repeat step S3 at an interval period, repeatedly print multiple reference mark images A at intervals at the edge of the first side of the printing medium 001, and repeatedly print multiple reference mark images A' at intervals at the edge of the second side of the printing medium 001 according to the second printing alignment position parameter, obtain the alignment position difference between the multiple reference mark images A and A', and adjust the second printing alignment position parameter according to the alignment position difference, so that the first printing alignment position is aligned with the second printing alignment position during the printing process until printing is completed.

[0049] In the above step S1, the printing medium 001 is first placed on the feeding roller 110, and after the starting end is pulled out, it bypasses at least one feeding guide roller 131 in the feeding guide roller group 130 in turn, and then bypasses the gap between the first tensioning roller 300 and the first driving roller 400, and goes around to the printing integrated module 600, passes through the first printing table 611 of the printing platform 610, and then extends into the guide portion 613, and then passes through the guide portion 613 and is led to the second printing table 612, and then bypasses the second driving roller 800, the second tensioning roller 700, and at least one receiving guide roller 231 in the receiving guide roller group in turn, and finally is received by the receiving roller 210 to complete the one-way path. In the above step S2, since the double-sided patterns of the printing medium 001 are completely contrasting mirror images, they are required to be completely aligned in the geometric direction. The first printing alignment position of the first printing inkjet carriage 621 on the first printing table 611 is also the first printing surface alignment position of the printing medium 001, and the second printing alignment position of the second printing inkjet carriage 631 on the second printing table 612 is obtained with reference to the first printing surface alignment position of the printing medium 001; the first printing alignment position and the second printing alignment position are the same alignment position on both sides of the printing medium 001, thereby ensuring that the printing position of the first printing inkjet carriage 621 on the printing medium 001 is the same as the printing position of the second printing inkjet carriage on the printing medium 001, and belong to different sides of the same position of the printing medium 001.

[0050] In the above step S3, the processor obtains the reference mark image A printed at the edge of the first side of the printing medium 001 by the first printing inkjet carriage 621, and the reference mark image A' printed at the edge of the second side of the printing medium 001 by the second printing inkjet carriage 631 through the image acquisition structure. The edge of the first side and the edge of the second side are located at the same position of the first side and the second side of the printing medium 001 when the printing is initially set. The processor compares the alignment relationship between image A and image A' to determine whether they are in a completely aligned state. If they are completely aligned, polling monitoring is performed until the printing is completed. If they are not completely aligned, there is a geometric position misalignment between image A and image A', then the processor adjusts the printing start position or printing time of the second printing inkjet carriage 631 on the second side according to the deviation between the two, and then adjusts the alignment of image A and image A' before printing. During the entire printing period, multiple comparisons, judgments and monitoring are performed at intervals to ensure that the patterns on both sides of the printing medium are completely overlapped, and dynamic polling high-frequency detection and correction are performed during the period. The printing effect is guaranteed.

[0051] This solution adopts a printing platform 610 and a printing beam 640 structure that are staggered and cross-arranged with each other, and two printing carriages share a beam structure, and the printing table shares a printing platform 610 structure. Not only is the structure compact and simple, but it is also easy to maintain and calibrate, easy to assemble and debug, and has a low failure rate.

[0052] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0053] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0054] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0055] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-sided printer, characterized in that: include: A material discharging module (100), a material collecting module (200), a driving roller located between the material discharging module (100) and the material collecting module (200), and a printing integrated module (600); The material discharging module (100) comprises a material discharging roller (110) and a material discharging guide roller (131), and the material receiving roller (200) comprises a material receiving roller (210) and a material receiving guide roller (231); The driving roller comprises a first driving roller (400) and a second driving roller (800); The printing integrated module (600) comprises a printing platform (610) and a printing beam (640), wherein the printing platform (610) and the printing beam (640) are mutually interlaced, and a guide portion (613) for a printing medium (001) to pass through is arranged on the printing platform (611) where the printing platform (611) passes through the printing beam (640), and two sides of the printing platform (610) opposite to the guide portion (613) or the printing beam (640) are respectively a first printing table (611) and a second printing table (612); and a first printing module (620) and a second printing module (630) are loaded on two sides of the printing beam (640) via beam tracks; The first printing module (620) corresponds to the first printing table (611) and prints on the first side of the printing medium (001), and the second printing module (630) corresponds to the second printing table (612) and prints on the second side of the printing medium (001).

2. The double-sided printer according to claim 1, wherein: The first printing table (611) and the second printing table (612) are respectively located on different surfaces of the printing platform (610), and the first printing table (611) and the second printing table (612) are located on both sides of the through-leading portion (613) of the printing platform (610).

3. The double-sided printer according to claim 1 or 2, characterized in that: The guide block (614) with an arc-shaped structure is arranged at the beginning and end contact parts of the threading portion (613) relative to the printing medium (001).

4. The double-sided printer according to claim 1 or 2, characterized in that: The printing platform (610) and the printing beam (640) are arranged to intersect each other in a cross shape, or the printing platform (610) and the printing beam (640) are arranged to intersect each other in an X-shaped cross shape.

5. The double-sided printer according to claim 1, wherein: The first printing table (611) and the second printing table (612) are both water-cooled printing tables.

6. The double-sided printer according to claim 1, wherein: There is only one printing platform (610) in the printing integrated module (600), there is only one printing beam (640) in the printing integrated module (600), the one printing platform (610) and the one printing beam (640) are arranged crosswise with each other, or the one printing platform (610) and the one printing beam (640) are arranged crosswise with each other in an X-shaped manner.

7. The double-sided printer according to claim 1, wherein: The first printing module (620) is provided with a first inkjet printing carriage (621), the first inkjet printing carriage (621) is arranged on a beam track on one side of the printing beam (640), the first inkjet printing carriage (621) corresponds to the first printing table (611) and performs reciprocating printing on the first side of the printing medium (001) along the beam track on the side, and the second printing module (630) is provided with a second inkjet printing carriage (631), the second inkjet printing carriage (631) is arranged on the beam track on the other side of the printing beam (640), the second inkjet printing carriage (631) corresponds to the second printing table (612) and performs reciprocating printing on the second side of the printing medium (001) along the beam track on the side.

8. The double-sided printer according to claim 5, characterized in that: The first printing module (620) is provided with a first distance adjustment structure for adjusting the distance between the first printing inkjet carriage (621) and the first printing table (611); the second printing module (630) is provided with a second distance adjustment structure for adjusting the distance between the second printing inkjet carriage (631) and the second printing table (612).

9. The double-sided printer according to claim 1, wherein: It also includes a first tensioning roller (300) located on the side of the first driving roller (400), a second tensioning roller (700) located on the side of the second driving roller (800), and an adjustment driving unit (320) for adjusting the distance between the first tensioning roller (300) and the first driving roller (400), and an adjustment driving unit (320) for adjusting the distance between the second tensioning roller (700) and the second driving roller (800), wherein the adjustment driving units (320) are both arranged on the printer frame via an adjustment base (310).

10. A double-sided printing method, characterized in that: A double-sided printer as claimed in any one of claims 1 to 9 is used, and the printing method comprises the following steps: S1: arranging the printing medium: placing the printing medium (001) between the feeding roller (110) and the receiving roller (210) of the cloth path of the double-sided printer, and sequentially passing through the first tensioning roller (300), the first driving roller (400), the printing integrated module (600), the second driving roller (800), and the second tensioning roller (700); the printing medium (001) is attached to the first printing table (611) in the printing integrated module (600), then passes through the threading portion (613), and then attaches to the second printing table (612) and passes out; S2 sets printing parameters: according to the double-sided pattern alignment requirements of the printing medium (001), adjust the first printing alignment position of the first printing inkjet carriage (621) on the first printing table (611) and the second printing alignment position of the second printing inkjet carriage (631) on the second printing table (612); the first printing alignment position and the second printing alignment position are the same alignment position on both sides of the printing medium (001); S3 adjusts printing parameters: a reference mark image A is printed at the edge of the first side of the printing medium (001) by a first printing inkjet carriage (621); according to the second printing alignment position parameter obtained in step S2, when the reference mark image A of the printing medium (001) reaches a relative second printing alignment position, a reference mark image A' is printed at the edge of the second side of the printing medium (001) by a second printing inkjet carriage (631); an alignment position difference between the reference mark images A and A' is obtained, and the second printing alignment position parameter is adjusted according to the alignment position difference, so that the first printing alignment position is aligned with the second printing alignment position; S4 completes printing: repeat step S3 at an interval period, repeatedly print multiple reference mark images A at intervals at the edge of the first side of the printing medium (001), and repeatedly print multiple reference mark images A' at intervals at the edge of the second side of the printing medium (001) according to the second printing alignment position parameter, obtain the alignment position difference between the multiple reference mark images A and A', and adjust the second printing alignment position parameter according to the alignment position difference, so that the first printing alignment position is aligned with the second printing alignment position during the printing process until printing is completed.

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