Patterned device and pattern printing method for patterned device

Abstract

The application belongs to the technical field of photovoltaic and semiconductor equipment, and provides a patterning device and a pattern printing method of the patterning device. The patterning device comprises a feeding station, a feeding buffer area and a cooling device. The feeding buffer area is provided with a plurality of feeding sub-stations, and the cooling device is arranged in the feeding buffer area and is suitable for cooling the feeding buffer area. The pattern printing station comprises an inkjet unit, which is suitable for spraying liquid hot melt ink drops on a substrate to prepare a mask layer. The discharging station comprises a turnover mechanism to turn over the substrate after inkjet printing and then discharge the substrate. The feeding station, the pattern printing station and the discharging station are arranged along the conveying direction of the main conveying line in sequence. The main conveying line is suitable for conveying the substrate upstream of the feeding buffer area, so that the plurality of feeding sub-stations alternately buffer the substrate, and the substrate cooled in the feeding sub-stations is fed to the pattern printing station, and the turned-over substrate is discharged, thereby improving the efficiency of preparing the mask layer on the substrate.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic and semiconductor manufacturing technology, specifically relating to a graphic device and a method for printing graphics on a graphic device. Background Technology

[0002] Currently, in the production process of solar cell electrodes, the patterning mask process includes a loading process, a patterning process, and an unloading process set on a conveying path. Among them, the loading process loads the solar cell to the patterning process for the preparation of the patterned mask layer.

[0003] In related technologies, the feeding process transports solar cells to the printing process for thermal inkjet printing. Thermal inkjet printing uses a molten material as the printing material. Before use, the material is solid; during use, it is melted into a liquid state by heat energy in the inkjet unit and then sprayed onto the surface of the solar cell to solidify and form a patterned mask. Considering production efficiency and the quality of the patterned mask, there is an urgent need to develop a patterning device suitable for thermal inkjet printing. Summary of the Invention

[0004] In view of this, the present invention provides a patterning device to solve the problem that patterning devices in the prior art affect production efficiency and molding quality in the battery cell production process.

[0005] This invention provides a graphics processing device, including a main conveyor line. The graphics processing device includes: a loading station, including a loading buffer area and a cooling device, wherein the loading buffer area has multiple loading sub-stations, and the cooling device is located in the loading buffer area and is adapted to cool the loading buffer area; a printing station, including an inkjet unit, the inkjet unit being adapted to spray liquid hot melt ink droplets onto the substrate to prepare a mask layer; and a unloading station, including a flipping mechanism for flipping the substrate after hot melt inkjet printing before unloading. The loading station, the printing station, and the unloading station are sequentially arranged along the conveying direction of the main conveyor line. The main conveyor line is adapted to convey the substrate upstream of the loading buffer area, such that the multiple loading sub-stations alternately buffer the substrate, and load the substrate cooled at the loading sub-stations onto the printing station, and unload the flipped substrate.

[0006] As an optional implementation, the feeding buffer area includes: at least one feeding branch line, which is arranged in parallel with the main conveyor line; and a feeding bin through which the main conveyor line and the feeding branch line pass; wherein the feeding buffer area is located within the feeding bin, and the plurality of feeding substations include a first feeding substation and a second feeding substation, wherein the first feeding substation is located on the main conveyor line within the feeding bin, and the second feeding substation is located on the feeding branch line within the feeding bin.

[0007] As an optional implementation, the feeding branch line includes: a first feeding line, which is set at an angle to the main conveyor line; a second feeding line, which is set at an angle to the first feeding line, and the second feeding line is provided with a second feeding substation, and the second feeding line and the main conveyor line are spaced apart from each other; and a discharging line, which is set at an angle to both the second feeding line and the main conveyor line, so that the substrate on the second feeding line enters the main conveyor line through the discharging line; wherein, the second feeding line passes through the feeding hopper.

[0008] As an optional implementation, the printing station further includes: a printing worktable; a motion module disposed on the printing worktable, the motion module being capable of reciprocating motion in a first motion direction, a second motion direction, and a third motion direction; a carrier unit disposed on the motion module, the carrier unit being adapted to carry a substrate and being capable of moving in the first motion direction; wherein, the inkjet unit is disposed on the motion module, the first motion direction, the second motion direction, and the third motion direction are arranged at an angle, and the first motion direction is the substrate conveying direction.

[0009] As an optional implementation, the motion module includes: a first linear motion mechanism adapted to move linearly in the first motion direction, with the bearing unit provided at one end of the first linear motion mechanism; a second linear motion mechanism adapted to move linearly in the second motion direction; and a third linear motion mechanism disposed on the second linear motion mechanism, adapted to move linearly in the third motion direction; wherein the inkjet unit is disposed on the third linear motion mechanism, and the first motion direction, the second motion direction, and the third motion direction are perpendicular to each other.

[0010] As an optional implementation, the carrier unit has a carrier surface, the substrate is placed on the carrier surface and covers the carrier surface; and / or the carrier unit has a carrier surface, the printing station further includes a positioning structure, the positioning structure includes a vacuuming device, a first flow channel disposed inside the carrier unit and a plurality of small holes disposed on the carrier surface, the plurality of small holes are respectively connected to the first flow channel, and the vacuuming device is adapted to evacuate the first flow channel so as to be able to adsorb the substrate.

[0011] As an optional implementation, the printing station further includes a cooling unit adapted to cool the substrate on the carrier unit.

[0012] As an optional implementation, the cooling unit includes a second flow channel disposed inside the support unit, and the second flow channel is filled with a cooling medium.

[0013] As an optional implementation, the flipping mechanism includes: a bracket; a drive mechanism disposed on the bracket; and a rotating member connected to the drive mechanism. The rotating member has at least one slot, which is adapted to engage the substrate. A first guide wheel and a second guide wheel are provided on opposite sides of the slot, and the first guide wheel and the second guide wheel can contact the substrate placed in the slot. The first guide wheel and the second guide wheel are rotatably connected to the rotating member. The drive mechanism is adapted to drive the rotating member to rotate so as to flip the substrate and place it on the main conveyor line.

[0014] As an optional implementation, the graphic device further includes a first photoluminescence detection device located on the main conveyor line, and the first photoluminescence detection device is located between the downstream of the feeding buffer area and the upstream of the printing station; and / or a second photoluminescence detection device located on the main conveyor line downstream of the flipping mechanism.

[0015] The present invention also provides a method for printing on a graphics device, using any of the graphics devices described above. The method includes: feeding a substrate into multiple loading substations of the graphics device for buffering; cooling the substrate buffered in the loading substations; controlling the cooled substrate in the loading substations to be loaded into the printing station; controlling the substrate to be fed to the printing station for hot melt inkjet printing; and controlling the substrate after hot melt inkjet printing to enter a flipping mechanism for flipping and unloading.

[0016] Beneficial effects: The loading station of the graphics equipment, through the coordination of a loading buffer area, a cooling device, and the main conveyor line, can reduce the surface temperature of the substrate entering the printing station to an ideal temperature while ensuring efficient loading and conveying. This allows the ink droplets from the thermal inkjet printing to quickly solidify and form on the substrate surface, improving the production efficiency of the printing process and the quality of the mask pattern. Furthermore, after the substrate completes inkjet printing on the first side at the printing station, it enters a flipping mechanism for flipping, enabling continuous inkjet printing on the second side of the substrate, thus improving the production efficiency of double-sided mask patterns. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the graphical device according to an embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the loading station of a graphical device according to an embodiment of the present invention;

[0020] Figure 3 This is a top view of the loading station of a graphical device according to an embodiment of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the conveying unit of the graphical device according to an embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the printing station of the graphic device according to an embodiment of the present invention;

[0023] Figure 6 This is a top view of the printing station of a graphic device according to an embodiment of the present invention.

[0024] Figure 7 This is a top view of the supporting unit of the printing station of a graphic device according to an embodiment of the present invention.

[0025] Figure 8 This is a top view of the support unit of the printing station of a graphic device according to another embodiment of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the unloading station of a graphical device according to an embodiment of the present invention;

[0027] Figure 10 This is a three-dimensional structural schematic diagram of the flipping mechanism of the unloading station of a graphical device according to an embodiment of the present invention.

[0028] Figure 11 This is one of the flowcharts for a graphical device printing method according to an embodiment of the present invention;

[0029] Figure 12 This is a second flowchart of a graphical device printing method according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Graphical device; 101. Main conveyor line; 102. Substrate; 103. Conveying unit; 1031. Base; 1032. Belt frame; 1033. Motor; 1034. Belt pulley shaft; 1035. Driven pulley; 1036. Driven pulley; 1037. Drive belt; 1038. Conveyor belt; 100. Loading station; 110. Loading buffer area; 1101. First loading substation; 1102. Second loading substation; 111. Loading 112. Feeding branch line; 1121. First feeding line; 1122. Second feeding line; 1123. Unloading line; 113. First buffer device; 114. Second buffer device; 120. Cooling device; 130. First photoluminescence detection device; 140. Lifting and translation mechanism; 150. Organizing module; 160. Waste removal mechanism; 170. Rotary feeding mechanism; 200. Printing station; 210. Printing workbench; 220. Motion module; 22 1. First linear motion mechanism; 222. Second linear motion mechanism; 223. Third linear motion mechanism; 230. Bearing unit; 240. Inkjet unit; 241. Printhead; 250. Vision positioning module; 260. Rotation mechanism; 270. Positioning structure; 280. Cooling unit; 300. Unloading station; 310. Tilting mechanism; 311. Support; 312. Drive mechanism; 313. Rotating component; 3131. First wheel; 3132. First clamp. 3133, second wheel body; 3134, second slot; 3135, first guide wheel; 3136, second guide wheel; 320, second photoluminescence detection device; 330, rotary unloading mechanism; 340, first straightening mechanism; 350, vision inspection module; 360, second straightening mechanism; 370, first non-conforming product rejection mechanism; 380, second non-conforming product rejection mechanism; X, first direction of motion; Y, second direction of motion; Z, third direction of motion. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] The following is combined Figures 1 to 12 The following describes embodiments of the present invention.

[0037] like Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, a graphical device 10 is provided.

[0038] The graphics processing device 10 includes a loading station 100, a printing station 200, and an unloading station 300. It includes a loading buffer area 110 and a cooling device 120. The loading buffer area 110 has multiple loading sub-stations. The cooling device 120 is located in the loading buffer area 110 and is adapted to cool the loading buffer area 110. The printing station 200 includes an inkjet unit 240, adapted to spray liquid hot-melt ink droplets onto the substrate 102 to prepare a mask layer. The unloading station 300 includes a flipping... Mechanism 310 is used to flip the substrate 102 after hot melt inkjet printing and then unload it; wherein, the loading station 100, the printing station 200 and the unloading station 300 are arranged sequentially along the conveying direction of the main conveyor line 101. The main conveyor line 101 is adapted to convey the substrate 102 upstream of the loading buffer area 110, so that multiple loading substations alternately buffer the substrate 102, and load the substrate 102 that has been cooled at the loading substations to the printing station 200, and unload the substrate 102 that has been flipped.

[0039] In this embodiment, the patterning device 10 is mainly used for fabricating mask layers in photovoltaics and semiconductors. The substrate 102 is a solar cell.

[0040] The patterning device 10 performs hot melt inkjet printing at the printing station 200 via the inkjet unit 240. Hot melt inkjet printing uses a hot melt material as the printing material. The printing material is solid before use, but is melted into a liquid state by heat energy in the inkjet unit 240 during use, and then sprayed onto the surface of the solar cell to solidify and form a patterned mask. The printing materials typically selected have a viscosity of 0.1 mPa-s to 20 mPa-s at temperatures above 50°C, and a viscosity of greater than or equal to 10,000 mPa-s at temperatures below 25°C, or are solid. Examples include one or more of the following: acrylic resin, rosin ester resin, C11-C22 alkyl acids, polypropylene wax, microcrystalline wax, polyethylene wax, and ethylene vinyl acetate copolymer wax.

[0041] During the thermal inkjet printing process, the ink droplets solidify at a low rate on the surface of the room-temperature solar cell, meaning that the solidification time is longer. This prolongs the residence time of the cell in the printing process, affecting production efficiency. Furthermore, excessive spread of the ink droplets on the cell surface affects their morphology, thus impacting the quality of the mask pattern. In addition, to improve the production efficiency of double-sided pattern masks, the substrate 102, after thermal inkjet printing at printing station 200, must be immediately unloaded and flipped as soon as possible. If the pattern mask on the first side of the substrate 102 is not fully solidified during or after flipping, damage to the mask pattern on the first side is highly likely.

[0042] If the cooling device 120 is directly installed in the printing process, the temperature of the battery cell at room temperature cannot be rapidly reduced to the ideal temperature within the very short printing time. The battery cell still needs to remain in the printing process, resulting in low production efficiency. In addition, during the fabrication of the pattern mask on the second side of the substrate 102, the presence of the mask layer on the first side of the substrate 102 will hinder heat conduction between the substrate 102 and the contact cooling device 120 during the printing process. This will cause the hot melt ink droplets to solidify at different rates on the two sides of the substrate 102, resulting in differences in the mask patterns on the two sides of the substrate 102. If the cooling device 120 is directly installed on the feeding conveyor line to reduce the surface temperature of the battery cell entering the printing station 200 to the ideal temperature in advance, this means that the feeding conveyor line and the cooling device 120 need to be set to be particularly long. This will not only greatly increase the length and floor space of the equipment, but also increase the feeding and conveying time, which will still affect the overall production efficiency.

[0043] This application ingeniously designs a graphic device 10 suitable for hot melt inkjet printing technology. Utilizing the coordination of a loading buffer 110, a cooling device 120, a main conveyor line 101, an inkjet unit 240, and a flipping mechanism 310, it can reduce the surface temperature of the substrate 102 entering the printing station 200 to an ideal temperature while ensuring efficient loading and conveying. This significantly increases the solidification rate of hot melt ink droplets on the surface of the substrate 102 in the printing station 200, allowing the ink droplets to rapidly solidify and form during hot melt inkjet printing. This not only improves the production efficiency of the printing process and the forming quality of the mask pattern but also helps ensure the integrity of the mask pattern on the substrate 102 during unloading and flipping, improving the production efficiency of double-sided pattern masks on the substrate 102. Furthermore, it helps eliminate the differences in the lines of the double-sided mask pattern caused by the presence of the mask during double-sided mask printing on the substrate 102.

[0044] Specifically, the cooling device 120 can reduce the surface temperature of the substrate 102 buffered in the loading buffer area 110, so that the surface temperature of the substrate 102 is reduced to the ideal temperature. While the substrate 102 being buffered at one of the feeding substations is cooling down, the substrate 102 at another feeding substation has already finished cooling down. The substrate 102 at the feeding substation that has finished cooling down can be fed to the printing station 200. After the feeding is completed, the feeding substation that was previously cooling down has finished cooling down and can start feeding. Therefore, multiple feeding substations can feed alternately, so that the substrates 102 that have finished cooling down can be continuously fed into the printing station 200 by the main conveyor line 101. The inkjet unit 240 performs hot melt inkjet printing on the substrates 102 entering the printing station 200 to form a mask pattern on the first surface of the substrate 102. The substrate 102 that has completed inkjet printing enters the flipping mechanism 310 to flip it over and unload it. It can then repeat the above process again via the main conveyor line 101 to form a mask pattern on the second surface of the substrate 102, thereby completing the production of a double-sided mask.

[0045] like Figure 4 As shown, the main conveyor line 101 includes multiple conveying units 103, which are arranged sequentially in the conveying direction of the main conveyor line 101.

[0046] The aforementioned main conveyor line 101 is a single conveyor line, comprising multiple conveying units 103 arranged sequentially along the conveying direction of the main conveyor line 101. Each conveying unit 103 includes a base 1031, a belt frame 1032, a motor 1033, a drive pulley 1035, a driven pulley 1036, a pulley shaft 1034, a transmission belt 1037, and a conveyor belt 1038. The base 1031 supports two belt frames 1032, which are spaced apart and can be parallel to each other. A conveyor belt 1038 is wound around each belt frame 1032. A connecting block is connected to the end of each belt frame 1032, and one end of the pulley shaft 1034 is rotatably connected to one connecting block, while the other end of the pulley shaft 1034 is rotatably connected to another connecting block. Both the driving pulley 1035 and the driven pulley 1036 are mounted on the pulley shaft 1034. The conveyor belt 1038 is mounted on the corresponding driven pulley 1036. The driving pulley 1035 is mounted on the pulley shaft 1034. The motor 1033 drives the driving pulley 1035 to rotate via the transmission belt 1037, thereby rotating the pulley shaft 1034, which in turn rotates the driven pulley 1036. The driven pulley 1036 then drives the corresponding conveyor belt 1038 to rotate. When the substrate 102 is placed on the two conveyor belts 1038, the two conveyor belts 1038 rotate to transport the substrate 102.

[0047] In another embodiment, such as Figure 2 and Figure 3 As shown, the loading buffer area 110 includes a loading bin 111 and at least one loading branch line 112. The loading branch line 112 is arranged in parallel with the main conveyor line 101. The loading bin 111 allows the main conveyor line 101 and the loading branch line 112 to pass through. The loading buffer area 110 is located within the loading bin 111. Multiple loading substations include a first loading substation 1101 and a second loading substation 1102. The first loading substation 1101 is located on the main conveyor line 101 within the loading bin 111, and the second loading substation 1102 is located on the loading branch line 112 within the loading bin 111. The loading buffer area 110 can continuously load the cooled substrate 102 while simultaneously cooling it, improving both loading efficiency and cooling efficiency of the substrate 102. Furthermore, it enhances safety in case of erroneous shutdowns at the printing station 200.

[0048] In this embodiment, the feeding branch line 112 also includes one or more conveying units 103.

[0049] The feeding branch line 112 can be configured as a single line, allowing it to form a feeding buffer zone 110 with the parallel main conveyor line 101. The main conveyor line 101 has a first feeding substation 1101, and the feeding branch line 112 has a second feeding substation 1102. By placing the first feeding substation 1101 and the second feeding substation 1102 within the feeding hopper 111, the feeding hopper 111 can be constructed as a relatively enclosed shell. This facilitates the cooling device 120 in cooling the feeding buffer zone 110 within the feeding hopper 111, thereby saving energy.

[0050] In another embodiment, continue to combine Figure 3 As shown, the feeding branch line 112 includes: a first feeding line 1121, a second feeding line 1122, and a discharge line 1123. The first feeding line 1121 is set at an angle to the main conveyor line 101, and the second feeding line 1122 is set at an angle to the first feeding line 1121. The second feeding line 1122 is provided with a second feeding substation 1102 and a second buffer device 114. The second feeding line 1122 and the main conveyor line 101 are spaced apart and arranged side by side. The discharge line 1123 is set at an angle to both the second feeding line 1122 and the main conveyor line 101, so that the substrate 102 on the second feeding line 1122 enters the main conveyor line 101 through the discharge line 1123. The second feeding line 1122 passes through the feeding bin 111.

[0051] In this embodiment, the first feeding line 1121 is arranged perpendicularly to the main conveyor line 101, the second feeding line 1122 is arranged parallel to the main conveyor line 101, and the unloading line 1123 is arranged perpendicularly to the main conveyor line 101. Both the first feeding line 1121 and the unloading line 1123 are located outside the feeding hopper 111. The feeding hopper 111 has two openings on opposite sides of the conveying direction of the main conveyor line 101 for the main conveyor line 101 to pass through. The second feeding line 1122 has two openings on opposite sides of the conveying direction for the second feeding line 1122 to pass through.

[0052] If substrate 102 enters the loading bin 111 via the main conveyor line 101, substrate 102 is buffered at the first loading substation 1101 before being loaded. If substrate 102 enters the loading bin 111 via the first loading line 1121 and the second loading line 1122, substrate 102 is buffered at the second loading substation 1102 before returning to the main conveyor line 101 via the unloading line 1123 for loading.

[0053] In another embodiment, a lifting and translating mechanism 140 is provided between the feeding branch line 112 and the main conveyor line 101. The lifting and translating mechanism 140 is adapted to translate the substrate 102 on the main conveyor line 101 onto the feeding branch line 112.

[0054] When the equipment starts printing, the first feeding substation 1101 feeds the printing station 200 with material through the first buffer device 113. At the same time, the material from the main conveyor line 101 enters the feeding branch line 112 and then enters the second feeding substation 1102 for buffering.

[0055] In this embodiment, the lifting and translation mechanism 140 can translate the substrate 102 on the main conveyor line 101 to the feeding branch line 112, thereby realizing the diversion of the substrate 102 on the main conveyor line 101.

[0056] Both the feeding branch line 112 and the main conveyor line 101 are equipped with a straightening module 150, which allows the substrate 102 to be properly positioned before entering the feeding buffer area 110.

[0057] In another embodiment, such as Figure 5 As shown, the printing station 200 also includes a printing worktable 210, a motion module 220, and a carrier unit 230. The motion module 220 is mounted on the printing worktable 210 and can reciprocate in the first motion direction X, the second motion direction Y, and the third motion direction Z. The carrier unit 230 is mounted on the motion module 220 and is adapted to carry the substrate 102 and can move in the first motion direction X. The inkjet unit 240 is mounted on the motion module 220. The first motion direction X, the second motion direction Y, and the third motion direction Z are set at an angle. The first motion direction X is the conveying direction of the substrate 102.

[0058] In this embodiment, the printing worktable 210 can be a marble worktable. The motion module 220 can move in three dimensions: the first motion direction X, the second motion direction Y, and the third motion direction Z, thereby adjusting the relative position of the inkjet unit 240 and the support unit 230. The printing step direction during inkjet printing is the first direction. The second direction is horizontal, and the third direction is vertical.

[0059] In the fields of photovoltaic and semiconductor manufacturing technology, methods such as screen printing, laser etching, and photosensitive adhesive etching have shortcomings.

[0060] The shortcomings of screen printing: (1) High-precision screen printing stencils are expensive and have a short service life; (2) Different stencils are only for one product, and the replacement operation is more complicated than the modification of the graphic in inkjet printing; (3) The current screen printing process is relatively complicated, and it is difficult to industrialize the width of 20μm and below; (4) The contact method has a high breakage rate.

[0061] Disadvantages of laser etching: (1) high energy consumption; (2) lower operating speed compared to inkjet printing; (3) the risk of damaging the substrate when the laser is directly placed on it.

[0062] The disadvantages of photoresist photolithography are: (1) low material utilization rate; (2) high material cost, mostly dependent on imports; (3) complicated steps; and (4) high cost of waste reagents and wastewater treatment.

[0063] The printing station 200 of this application can realize hot melt inkjet printing on the substrate 102. The picoliter-level liquid hot melt ink ejected by the inkjet unit 240 can be printed on the preset position on the substrate 102 as needed and solidified to form a pattern mask. The operation is simple and the printing efficiency is high. Since the ink droplets can fall precisely on the preset position of the substrate 102 and solidify directly, the forming quality of the mask pattern is improved, that is, the fineness of the mask pattern lines is improved. The inkjet unit 240 and the carrier unit 230 are set on the motion module 220. On the one hand, the relative position of the inkjet unit 240 and the substrate 102 can be adjusted, which is beneficial to the position correction of the substrate 102 before printing and can also adapt to various mask layer sizes to meet different customer needs. On the other hand, the movement of the carrier unit 230 in the first direction during printing is more conducive to meeting the automation cycle requirements of mass production.

[0064] In another embodiment, such as Figure 5 and Figure 6 As shown, the support unit 230 has a support surface, and the substrate 102 is placed on the support surface and covers the support surface.

[0065] In this embodiment, the substrate 102 is placed on the carrier surface. When the substrate 102 does not cover the carrier surface, during hot melt inkjet printing on the first side of the substrate 102, ink droplets falling on the edge of the first side of the substrate 102 may overflow onto the carrier surface outside the substrate 102, potentially contaminating the carrier surface and affecting the printing of the pattern mask on the second side of the substrate 102 and the printing efficiency. By having the substrate 102 cover the carrier surface, the carrier surface can be kept clean, which is beneficial for the preparation of double-sided pattern masks on the substrate 102 and improves double-sided printing efficiency.

[0066] In another embodiment, such as Figure 7 and Figure 8 As shown, the printing station 200 also includes a positioning structure 270, which is adapted to position the substrate 102 on the carrier unit 230.

[0067] Combination Figure 7As shown, the positioning structure 270 can be a vacuum adsorption structure used to adsorb and position the substrate 102. The positioning structure 270 includes a vacuum pumping device, a first flow channel disposed inside the support unit 230, and several small holes disposed on the support surface, each of which communicates with the first flow channel. The vacuum pumping device is located outside the support unit 230. By drawing a vacuum into the first flow channel, the vacuum pumping device allows the substrate 102 to be adsorbed onto the support unit 230. The vacuum pumping device can be a vacuum pump. Using the vacuum adsorption positioning structure 270, the adsorption force for adsorbing the substrate 102 can be automatically adjusted, resulting in a high degree of automation.

[0068] Combination Figure 8 As shown, the positioning structure 270 can also be a mechanical positioning structure, which is a clamping member disposed on the bearing unit 230, pressing the substrate 102 onto the bearing unit 230. Alternatively, the mechanical positioning structure can also be a slot disposed on the bearing surface of the bearing unit 230, with the substrate 102 engaging within the slot to achieve positioning of the substrate 102. Alternatively, the mechanical positioning structure can also be a limiting post disposed on the bearing unit 230, with multiple limiting posts arranged circumferentially to form a space, limiting the substrate 102 within the space. Using a mechanical positioning structure, since the mechanical positioning structure is fixed, allows for more accurate positioning of the substrate 102 on the bearing unit.

[0069] In another embodiment, such as Figure 12 As shown, the printing station 200 also includes a cooling unit 280, which is adapted to cool the substrate 102 on the carrier unit 230.

[0070] The substrate 102, at certain sizes, requires multiple printings to prepare a single-sided mask pattern. Since the condensation of ink droplets releases heat and transfers it to the substrate 102, differences in surface temperature occur during multiple printings. This results in significant variations in the size and morphology of the condensed ink droplets in different areas of the single-sided mask, directly affecting the quality of the single-sided mask pattern. By incorporating a cooling unit 280, the substrate 102 on the carrier unit 230 can maintain a lower temperature, facilitating rapid condensation and formation of ink droplets upon landing on the substrate 102. This eliminates temperature differences between different areas of the substrate 102 during multiple single-sided printings, improving the formation quality of the mask pattern.

[0071] In another embodiment, the cooling unit 280 includes a second flow channel disposed inside the support unit 230, and the second flow channel is filled with a cooling medium.

[0072] The cooling unit 280 can be integrated with the support unit 230, and the cooling medium can be, for example, cold air or liquid cooling medium. The cooling medium cools the support unit, allowing the support unit 230 and the cooling unit 280 to be integrated into a vacuum adsorption cooling platform, which simplifies the structural design and saves costs.

[0073] In another embodiment, such as Figure 5 and Figure 12 As shown, the printing station 200 also includes a rotating mechanism 260, which is located at the bottom of the support unit 230 and fixed on the motion module 220. The rotating mechanism 260 is adapted to drive the support unit 230 to rotate by an angle.

[0074] The bottom of the support unit 230 is provided with a rotating mechanism 260 connected to the motion module 220, which can adjust the position of the substrate 102. The rotating mechanism 260 is a direct drive rotary motor (DD motor).

[0075] In another embodiment, the inkjet unit 240 includes an ink supply assembly and a printhead 241, the ink supply assembly being adapted to deliver liquid hot melt ink droplets to the printhead 241.

[0076] The ink supply assembly is equipped with a heating element, which heats the solid hot-melt printing material. The printing material is melted into a liquid state by the heat energy, forming hot-melt ink droplets, which are then sprayed onto the surface of the solar cell and solidified to form a patterned mask. The heating element can be one or more of infrared thermal radiation, heating elements, heating blocks, and heating rods.

[0077] In another embodiment, continue to combine Figure 5 As shown, the motion module 220 includes a first linear motion mechanism 221, a second linear motion mechanism 222, and a third motion mechanism. The first linear motion mechanism 221 is adapted to move linearly in the first motion direction X, and a bearing unit 230 is provided at one end of the first linear motion mechanism 221. The second linear motion mechanism 222 is adapted to move linearly in the second motion direction Y. The third linear motion mechanism 223 is disposed on the second linear motion mechanism 222 and is adapted to move linearly in the third motion direction Z. The inkjet unit 240 is disposed on the third linear motion mechanism 223, and the first motion direction X, the second motion direction Y, and the third motion direction Z are perpendicular to each other.

[0078] The first linear motion mechanism 221 is mounted on the printing worktable 210. One end of the first linear motion mechanism 221 is provided with a bearing unit 230, which is adapted to bear the substrate 102 of the main conveyor line 101. The second linear motion mechanism 222 is mounted on the printing worktable 210. The direction of linear motion of the second linear motion mechanism 222 is perpendicular to the direction of motion of the first linear motion mechanism 221. The third linear motion mechanism 223 is mounted on the second linear motion mechanism 222. The direction of motion of the third linear motion mechanism 223 is perpendicular to the direction of motion of the second linear motion mechanism 222.

[0079] In another embodiment, the first linear motion mechanism 221 and the second linear motion mechanism 222 are linear motors 1033 and the third linear motion mechanism 223 is a movable lead screw module.

[0080] In this embodiment, a U-shaped frame is provided on the printing workbench 210, and the second linear motion mechanism 222 is connected to the U-shaped frame. The first linear motion mechanism 221 is a linear motor 1033, and the linear motion direction of the first linear motion mechanism 221 is parallel to the conveying direction of the main conveyor line 101. The linear motion direction of the third linear motion mechanism 223 is vertical, allowing the position of the inkjet unit 240 to rise or fall. The third linear motion mechanism 223 is a movable lead screw module. The second linear motion mechanism 222 and the first linear motion mechanism 221 are both linear motors 1033. The linear motion direction of the second linear motion mechanism 222 is longitudinal in the horizontal plane, allowing the inkjet unit 240 to move closer to or further away from the first linear motion mechanism 221.

[0081] In another embodiment, such as Figure 5 and Figure 12 As shown, the printing station 200 also includes a vision positioning module 250. The vision positioning module 250 is located on the printing worktable 210, and the vision positioning module 250 is adapted to perform visual positioning on the substrate 102 on the carrier unit 230. After the motion module 220 moves the carrier unit 230 to the printing area of ​​the inkjet unit 240, the motion module 220 drives the carrier unit 230 to move.

[0082] In the conveying direction, the printing worktable 210 is sequentially equipped with a vision positioning module 250, an inkjet unit 240, a third linear motion mechanism 223, and a second linear motion mechanism 222.

[0083] The workflow of the printing station 200 is as follows: When the carrier unit 230 moves to the vision positioning module 250, the vision positioning module 250 takes a picture of the substrate 102 placed on the carrier unit 230 to capture the visual position. If the position of the substrate 102 is not qualified, the rotation mechanism 260 is controlled to rotate the carrier unit 230 until the position of the substrate 102 on the carrier unit 230 is qualified. Alternatively, the second linear motion mechanism 222 is controlled to move linearly, so that the inkjet unit 240 connected to the second linear motion mechanism 222 moves closer to or further away from the carrier unit 230 to adjust the relative position between the substrate 102 and the inkjet unit 240 on the carrier unit 230 until the relative position of the substrate 102 and the inkjet unit 240 is qualified. In some cases, the position of the substrate 102 is corrected by controlling the rotation mechanism 260 to rotate and controlling the movement of the second linear motion mechanism 222, which will not be described in detail here. When the substrate 102 is in the correct position in the carrier unit 230, the inkjet unit 240 is activated to perform hot melt inkjet printing on the substrate 102.

[0084] After the first side of the substrate 102 is printed with hot melt inkjet at the printing station 200, it enters the main conveyor line 101 through the rotating feeding mechanism 330, and then enters the flipping mechanism 310 to flip it so that the second side of the substrate 102 faces upward, so that the second side of the substrate 102 can be printed with hot melt inkjet at the printing station 200.

[0085] The flipping mechanism 310 is positioned on the conveying path of the main conveyor line 101. The rotating wheel of the flipping mechanism 310 continuously rotates clockwise along the conveying direction, sequentially flipping multiple substrates 102. This allows the substrates 102 to be flipped during the feeding and conveying process, improving work efficiency. Compared to flipping the substrates 102 using a robotic arm, the flipping mechanism 310 eliminates the need for the substrates 102 to stop before or after the feeding and conveying process, further improving flipping efficiency. Furthermore, the structure of the flipping mechanism 310 is simpler than that of a complex robotic arm.

[0086] In this embodiment, the flipped substrate 102 can be fed again through the main conveyor line 101 and enter the printing station 200 for printing the second side, which helps to improve the efficiency of making a double-sided pattern mask layer on the substrate 102.

[0087] In another embodiment, such as Figure 9 and Figure 10As shown, the flipping mechanism 310 includes a bracket 311, a drive mechanism 312, and a rotating member 313. The drive mechanism 312 is mounted on the bracket 311, and the rotating member 313 is connected to the drive mechanism 312. The rotating member 313 is provided with at least one slot, which is suitable for engaging the substrate 102. A first guide wheel 3135 and a second guide wheel 3136 are provided on opposite sides of the slot. The first guide wheel 3135 and the second guide wheel 3136 can contact the substrate 102 placed in the slot. The first guide wheel 3135 and the second guide wheel 3136 are rotatably connected to the rotating member 313. The drive mechanism 312 is adapted to drive the rotating member 313 to rotate so as to flip the substrate 102 and place it on the main conveyor line 101.

[0088] The bracket 311 is a fixed part, the drive mechanism 312 can be a drive motor 3033, the rotating part 313 is provided with a rotating shaft, the rotating shaft is connected to the drive mechanism 312, or the drive mechanism 312 is provided with a connecting hole, the connecting hole is directly connected to the output shaft of the drive mechanism 312, so that the drive mechanism 312 can directly drive the rotating part 313 to rotate, which simplifies the drive structure of the flipping mechanism 310.

[0089] The slot can be used to clamp the substrate 102. The substrate 102 clamped in the slot can be flipped over after rotating synchronously with the rotating component 313. The structure is simple and easy to implement. During the process of the substrate 102 being inserted into the slot, the substrate 102 contacts the first guide wheel 3135 and the second guide wheel 3136. The first guide wheel 3135 and the second guide wheel 3136 rotate, causing the substrate 102 to be continuously clamped in the slot. Therefore, the arrangement of the first guide wheel 3135 and the second guide wheel 3136 allows the substrate 102 to be clamped more smoothly in the corresponding slot, reducing the breakage rate of the substrate 102.

[0090] In another embodiment, the rotating member 313 has a circular structure, and the slot extends radially in the rotating member 313.

[0091] The rotating component 313 can be a wheel. The wheel is generally circular, and the rotating component 313 has a radially extending groove. The width of the groove matches the thickness of the substrate 102, allowing the substrate 102 to be inserted into the groove. When the rotating component 313 rotates 180°, the substrate 102 rotates 180° synchronously, thus flipping the substrate 102. After rotating 180°, the substrate 102 is flipped and placed on the main conveyor line 101, allowing the substrate 102 to continue to be unloaded.

[0092] The rotation center of the rotating component 313 is located at the virtual center of the rotating component 313. The slot passes through the two opposite end faces of the rotating component 313 and extends to the circumferential surface of the rotating component 313. The slot extends radially in the rotating component 313, so the rotating component 313 can rotate continuously in one direction without changing direction or stopping, which improves the flipping efficiency of the substrate 102 and simplifies the flipping control process.

[0093] Of course, the slot may not extend radially in the rotating part 313, which may make the control of the rotation mode of the rotating part 313 more complicated.

[0094] In another embodiment, multiple slots are provided, evenly distributed along the circumference of the rotating member 313. The multiple slots are evenly arranged within the rotating member 313, each extending radially. For example, 10 slots, 8 slots, etc., can be evenly arranged; no specific limitation is made here. When multiple slots are provided, when one slot engages with the substrate 102 and rotates, the adjacent slot rotates to the engagement position, clamping another substrate 102, and so on. The rotating member 313 rotates 180° to flip the substrate 102. When the slot initially clamping the substrate 102 rotates 180° and unloads, as the rotating member 313 rotates, it continuously flips the corresponding substrates 102 180° and unloads them, improving the unloading efficiency.

[0095] The slot extends radially in the rotating member 313, so that the substrate 102 clamped in the slot can be flipped by rotating the rotating member 313 180°. The rotating member 313 can rotate continuously in one rotation direction to continuously flip the substrate 102.

[0096] In another embodiment, continue to combine Figure 10 As shown, the rotating component 313 includes a first wheel body 3131 and a second wheel body 3133. The first wheel body 3131 has a first slot 3132. The second wheel body 3133 is coaxial with the first wheel body 3131 and is axially spaced from the first wheel body 3131. The second wheel body 3133 has a second slot 3134, which is opposite to the first slot 3132 to jointly clamp the substrate 102. The first slot 3132 and the second slot 3134 are respectively provided with a first guide wheel 3135 and a second guide wheel 3136, which are disposed in the space between the first wheel body 3131 and the second wheel body 3133. The arrangement of the first guide wheel 3135 and the second guide wheel 3136 allows the substrate 302 to be clamped more smoothly in the corresponding slots, reducing the breakage rate of the substrate 302.

[0097] In this embodiment, the slot includes a first slot 3132 and a second slot 3134. The first wheel 3131 and the second wheel 3133 can each be a sheet-like structure, with the two wheels spaced apart from each other. The first wheel 3131 and the second wheel 3133 can be integrally formed, or they can be respectively fixed to a cylindrical structure. The first wheel 3131 has the first slot 3132, and the second wheel 3133 has the second slot 3134. The first slot 3132 and the second slot 3134 are spaced apart, providing greater stability when clamping the substrate 102. The first wheel 3131 has multiple first slots 3132, which are radially arranged, and the second wheel 3133 has multiple second slots 3134, which are radially arranged. The multiple first slots 3132 and the multiple second slots 3134 are arranged in a one-to-one correspondence. On the inner side of the first wheel body 3131, corresponding to the first slot 3132, a first guide wheel 3135 and a second guide wheel 3136 are respectively provided on opposite sides of the first slot 3132. Similarly, on the inner side of the second wheel body 3133, corresponding to the second slot 3134, a first guide wheel 3135 and a second guide wheel 3136 are respectively provided on opposite sides of the second slot 3134.

[0098] In another embodiment, such as Figure 2 and Figure 9 As shown, the graphic device 10 also includes a first photoluminescence detection device 130, which is located on the main conveyor line 101 and between the downstream of the loading buffer area 110 and the upstream of the printing station 200; and / or a second photoluminescence detection device 320, which is located on the main conveyor line 101 downstream of the flipping mechanism 310.

[0099] In this embodiment, a waste removal mechanism 160 and a rotary feeding mechanism 170 are sequentially provided downstream of the first photoluminescence (PL) detection device 130. The substrate 102 is conveyed to the first photoluminescence (PL) detection device 130 for a stop. The first photoluminescence (PL) detection device 130 is located upstream of the printing station 200 of the main conveyor line 101, allowing the substrate 102 entering the main conveyor line 101 from the feeding buffer area 110 to be conveyed to the PL detection device for microcrack detection. Microcracked substrates are then discharged through the waste removal mechanism 160. The waste removal mechanism 160 is a lifting and translation mechanism that removes unqualified substrates 102 into the NG (Not Good) material box buffer, thus ensuring that all substrates 102 entering the printing station 200 via the rotary feeding mechanism 170 are qualified. The rotary feeding mechanism 170 can then feed qualified substrates 102 to the printing station 200.

[0100] The first PL inspection device performs optical inspection on the quality of the substrate 102, testing for abnormalities in the substrate 102, including scratches and foreign objects other than microcracks. If OK, it continues to be transported to the carrier unit 230; if NG, it is transported to the waste film recycling device on the side.

[0101] The second PL detection device is set on the main conveyor line 101 downstream of the flipping mechanism 310, so that the flipped substrate 102 can be conveyed to the second PL detection device for microcrack detection. The microcracked substrate will be discharged into the NG material box buffer by the rotary suction cup feeding mechanism, thereby ensuring that the substrate 102 after feeding is qualified.

[0102] The second PL inspection device performs optical inspection on the quality of the substrate 102, testing for abnormalities in the substrate 102, including scratches and foreign objects other than microcracks. If OK, the feeding continues and the unloading is completed. If NG, it is fed to the waste film recycling device on the side.

[0103] The second PL detection device is set on the main conveyor line 101 downstream of the flipping mechanism 310, so that after the substrate 102 that has completed the printing is flipped, the hidden crack detection on the second side can be realized. The hidden cracked piece will be discharged into the NG material box buffer by the rotating suction cup. Defective products can be rejected in advance by AOI. The good products are flipped and conveyed to the printing station 200 for the second side printing.

[0104] The unloading station 300 of the graphical device 10 is further equipped with a first straightening mechanism 340, a vision inspection module 350, a second straightening mechanism 360, a first defective product rejection mechanism 370, and a second defective product rejection mechanism 380 on the main conveyor line 101. The substrate 102, conveyed downstream to the main conveyor line 101 by the rotary unloading mechanism 330, is straightened by the first straightening mechanism 340. The straightened substrate 102 is then conveyed to the vision inspection module 350 for photographic inspection. The vision inspection module 350 is an OAI vision inspection mechanism. If the substrate 102 is detected as defective, it will be rejected by the first defective product rejection mechanism 370 when the substrate 102 is conveyed to the flipping mechanism 310, thus ensuring that the substrate 102 entering the flipping mechanism 310 is a qualified product. Substrate 102 that passes the visual inspection module 350 enters the flipping mechanism 310 for flipping and then falls onto the main conveyor line 101. As substrate 102 continues to be conveyed to the second straightening mechanism 360, the second straightening mechanism straightens the flipped substrate 102. After straightening, substrate 102 proceeds to the second photoluminescence detection device 320 for inspection. Substrate 102 that passes the inspection is unloaded. Substrate 102 that fails the second photoluminescence detection device 320 is rejected by the second non-conforming product rejection mechanism 380.

[0105] like Figure 11 and Figure 12 As shown, according to an embodiment of the present invention, a printing method for a graphical device 10 is also provided. Using any of the graphical devices 10 described above, the printing method for the graphical device 10 includes the following steps:

[0106] Step S101: The substrate 102 is conveyed into multiple loading substations of the patterning device 10 for buffering;

[0107] Step S103: Cool the substrate 102 that is buffered at the feeding station;

[0108] Step S105: The substrate 102 of the loading substation, which has completed cooling, is loaded into the printing station 200;

[0109] Step S107: Control the substrate 102 to be transported to the printing station 200 to complete the hot melt inkjet printing;

[0110] Step S109: Control the substrate 102 that has completed hot melt inkjet printing to enter the flipping mechanism 310 for flipping and unloading.

[0111] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation.

[0112] For those skilled in the art, various other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. Obvious variations or modifications derived therefrom remain within the scope of this invention.

Claims

1. A graphical device, comprising a main conveyor line (101), characterized in that, The graphical device (10) includes: The loading station (100) includes a loading buffer area (110) and a cooling device (120). The loading buffer area (110) is provided with multiple loading sub-stations. The cooling device (120) is located in the loading buffer area (110) and is adapted to cool the loading buffer area (110). The printing station (200) includes an inkjet unit (240) adapted to spray liquid hot melt ink droplets onto a substrate (102); The unloading station (300) includes a flipping mechanism (310) to flip the substrate (102) after hot melt inkjet printing before unloading; The loading station (100), the printing station (200), and the unloading station (300) are arranged sequentially along the conveying direction of the main conveyor line (101). The main conveyor line (101) is adapted to convey the substrate (102) upstream of the loading buffer area (110), so that multiple loading substations alternately buffer the substrate (102), and the substrate (102) that has been cooled at the loading substation is loaded onto the printing station (200), and the substrate (102) that has been flipped is unloaded. The feeding buffer area (110) includes: At least one feeding branch line (112) is provided in parallel with the main conveyor line (101); The feeding hopper (111) is provided through which the main conveyor line (101) and the feeding branch line (112) pass; The feeding buffer area (110) is located in the feeding bin (111), and the plurality of feeding substations include a first feeding substation (1101) and a second feeding substation (1102). The first feeding substation (1101) is located on the main conveyor line (101) in the feeding bin (111), and the second feeding substation (1102) is located on the feeding branch line (112) in the feeding bin (111).

2. The graphical device according to claim 1, characterized in that, The feeding branch line (112) includes: The first feeding line (1121) is set at an angle to the main conveyor line (101); The second feeding line (1122) is set at an angle to the first feeding line (1121). The second feeding line (1122) is provided with a second feeding substation (1102). The second feeding line (1122) and the main conveyor line (101) are set at intervals. The unloading line (1123) is set at an angle to both the second loading line (1122) and the main conveyor line (101), so that the substrate (102) on the second loading line (1122) enters the main conveyor line (101) through the unloading line (1123). The second feeding line (1122) passes through the feeding hopper (111).

3. The graphical device according to claim 1 or 2, characterized in that, The printing station (200) also includes: Printing workbench (210); A motion module (220) is disposed on the printing worktable (210), and the motion module (220) can reciprocate in a first motion direction (X), a second motion direction (Y) and a third motion direction (Z); A support unit (230) is disposed on the motion module (220). The support unit (230) is adapted to support the substrate (102) and can move in the first motion direction (X). The inkjet unit (240) is disposed on the motion module (220), and the first motion direction (X), the second motion direction (Y) and the third motion direction (Z) are set at an angle, wherein the first motion direction (X) is the conveying direction of the substrate (102).

4. The graphical device according to claim 3, characterized in that, The motion module (220) includes: The first linear motion mechanism (221) is adapted to move linearly in the first motion direction (X), and the bearing unit (230) is provided at one end of the first linear motion mechanism (221). The second linear motion mechanism (222) is adapted to move linearly in the second motion direction (Y); The third linear motion mechanism (223) is disposed on the second linear motion mechanism (222), and the third linear motion mechanism (223) is adapted to move linearly in the third motion direction (Z); The inkjet unit (240) is mounted on the third linear motion mechanism (223), and the first motion direction (X), the second motion direction (Y), and the third motion direction (Z) are perpendicular to each other.

5. The graphical device according to claim 3, characterized in that, The carrier unit (230) has a carrier surface, and the substrate (102) is placed on the carrier surface and covers the carrier surface; and / or the carrier unit (230) has a carrier surface, and the printing station (200) further includes a positioning structure (270), the positioning structure (270) includes a vacuum device, a first flow channel disposed inside the carrier unit (230) and a plurality of small holes disposed on the carrier surface, the plurality of small holes being respectively connected to the first flow channel, and the vacuum device being adapted to vacuum the first flow channel so as to be able to adsorb the substrate (102).

6. The graphical device according to claim 3, characterized in that, The printing station (200) also includes a cooling unit (280) adapted to cool the substrate (102) on the carrier unit (230).

7. The graphical device according to claim 6, characterized in that, The cooling unit (280) includes a second flow channel disposed inside the support unit (230) and a cooling medium filled in the second flow channel.

8. The graphical device according to claim 1 or 2, characterized in that, The flipping mechanism (310) includes: Bracket (311); A drive mechanism (312) is mounted on the bracket (311); A rotating component (313) is connected to the driving mechanism (312). The rotating component (313) is provided with at least one slot, which is adapted to engage the substrate (102). A first guide wheel (3135) and a second guide wheel (3136) are provided on opposite sides of the slot. The first guide wheel (3135) and the second guide wheel (3136) can contact the substrate (102) placed in the slot. The first guide wheel (3135) and the second guide wheel (3136) are rotatably connected to the rotating component (313). The drive mechanism (312) is adapted to drive the rotating member (313) to rotate so as to flip the substrate (102) and place it on the main conveyor line (101).

9. The graphical device according to claim 1 or 2, characterized in that, The graphic device (10) further includes a first photoluminescence detection device (130), which is located on the main conveyor line (101) and is located between the downstream of the loading buffer area (110) and the upstream of the printing station (200); and / or a second photoluminescence detection device (320), which is located on the main conveyor line (101) downstream of the flipping mechanism (310).

10. A method for printing graphics on a graphical device, employing the graphical device (10) as described in any one of claims 1 to 9, characterized in that, The printing method of the graphics device includes: The substrate (102) is fed into multiple loading substations of the graphics device (10) for buffering; The substrate (102) buffered at the loading substation is cooled; The substrate (102) of the loading substation, which is alternately controlled to complete the cooling process, is loaded onto the printing substation (200); The control substrate (102) is conveyed to the printing station (200) to complete the hot melt inkjet printing; The substrate (102) that has completed hot melt inkjet printing is controlled to enter the flipping mechanism (310) for flipping and then unloading.

Images