A display backplane printing apparatus with an insulating coating and a printing method thereof

Abstract

The present application relates to display backplane printing technical field, specifically disclose a kind of display backplane printing device with insulating coating and printing method thereof, including alignment setting upper cover and lower cover, X-shaped rotating frame is equipped in upper cover and lower cover middle, suction cup mechanism is equipped on X-shaped rotating frame, X-shaped rotating frame is transversely fixed with connecting rod, rotating mechanism matched with connecting rod is equipped outside upper cover and lower cover, paint spraying head is installed in the upper side middle part of the inside of upper cover, drying air outlet and shower head are respectively equipped in the left and right sides of paint spraying head, both sides of upper cover and lower cover are equipped with U-shaped frame, two U-shaped frames are equipped with lifting mechanism matched with upper cover and lower cover, one end of upper cover and lower cover is equipped with moving mechanism matched with two U-shaped frames.The present application can be sprayed and cleaned and paint printing operation in one station, reduce cost and material transportation time, improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of display backplane printing technology, and more particularly to a display backplane printing apparatus with an insulating coating and a printing method thereof. Background Technology

[0002] Printing an insulating coating on the display back panel provides an anti-static effect. This insulating coating, also known as insulating varnish, is composed of resin and ink and is a coating with excellent electrical insulation properties. It also possesses good electrochemical, thermal, mechanical, and chemical properties. Display back panel printing is performed after the back panel has undergone a stamping process. At this point, the back panel surface may contain debris or dust, which is detrimental to subsequent printing operations. Current cleaning and printing steps require separate workstations, increasing costs and material transport time, thus impacting work efficiency.

[0003] Therefore, in order to solve such problems, we propose a display backplate printing device with an insulating coating and a printing method thereof. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a display backplate printing apparatus and printing method with an insulating coating.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A display back panel printing device with an insulating coating includes an upper cover and a lower cover aligned together. An X-shaped rotating frame is provided between the upper cover and the lower cover. A suction cup mechanism is provided on the X-shaped rotating frame. A connecting rod is horizontally fixed to the X-shaped rotating frame. A rotating mechanism matching the connecting rod is provided on the outside of the upper cover and the lower cover. A paint spray head is installed in the middle of the upper side inside the upper cover. A drying air outlet and a spray head are respectively provided on the left and right sides of the paint spray head.

[0007] Both sides of the upper and lower cover are provided with U-shaped frames, and each U-shaped frame is equipped with a lifting mechanism that matches the upper and lower cover. One end of the upper and lower cover is equipped with a moving mechanism that matches the two U-shaped frames.

[0008] Preferably, the suction cup mechanism includes cylindrical blocks fixedly connected to the four ends of the X-shaped rotating frame. The cylindrical blocks are vertically arranged, and the upper end of the cylindrical blocks is connected to a suction cup via a ball shaft.

[0009] Preferably, all four support rods of the X-shaped rotating frame are telescopic and are equipped with a first fastening knob, wherein an arc-shaped telescopic rod is connected between two support rods and is equipped with a second fastening knob.

[0010] Preferably, the rotating mechanism includes a fixed seat located at one end of the upper cover and the lower cover. The fixed seat has a slot that matches the connecting rod. One end of the connecting rod is located in the slot and is rotatably connected to the fixed seat. A motor is fixed at the upper end of the fixed seat. The power transmission shaft of the motor is fixedly connected to the connecting rod. The side wall of the lower cover has a slot that matches the connecting rod.

[0011] Preferably, the lengths of the paint spray head, the drying air outlet, and the spray nozzle are all the same as the width of the upper cover.

[0012] Preferably, the upper cover has an exhaust vent at the top and the lower cover has a drain pipe connected to the bottom.

[0013] Preferably, the U-shaped frame is arranged horizontally with its opening facing the fixed base, and both U-shaped frames are provided with slide rails on their lower sides, and the U-shaped frames are slidably connected to the slide rails.

[0014] Preferably, the lifting mechanism includes a plurality of first lifting rods and a plurality of second lifting rods, which are evenly arranged on two U-shaped frames. The two ends of the first lifting rods are fixedly connected to the upper cover and the upper side of the U-shaped frame, respectively. The two ends of the second lifting rods are fixedly connected to the lower cover and the lower side of the U-shaped frame, respectively. The upper cover and the lower cover are slidably connected to the two U-shaped frames on both sides.

[0015] Preferably, the moving mechanism includes a horizontally arranged hydraulic cylinder located at the end away from the fixed base. The hydraulic cylinder is fixedly supported by a support frame, and the two U-shaped frames are fixedly connected on the sides by a horizontal rod. The telescopic end of the hydraulic cylinder is fixedly connected to the side of the horizontal rod.

[0016] A method for printing a display back panel with an insulating coating, the method comprising the following steps:

[0017] Step 1: The display back panel to be printed is attached to the X-shaped rotating frame by a suction cup mechanism. The upper cover is raised by a lifting mechanism, the lower cover is lowered by a lifting mechanism, and the connecting rod is rotated by a rotating mechanism to move the X-shaped rotating frame and the display back panel to be printed between the upper and lower covers.

[0018] Step 2: The upper cover is lowered by the lifting mechanism, and the lower cover is raised by the lifting mechanism. The upper and lower covers are combined, and the display back panel to be printed is located inside the space between the upper and lower covers.

[0019] Step 3: The moving mechanism drives the upper and lower covers to move to one end. While moving, the spray head sprays water to clean the display back panel to be printed. After cleaning, the movement stops.

[0020] Step 4: The moving mechanism drives the upper and lower covers to move to the other end. While moving, the drying air outlet blows air to dry the display back panel to be printed. After drying is complete, the movement stops.

[0021] Step 5: The moving mechanism drives the upper and lower covers to move back and forth as a whole. While moving, the paint spray head performs the painting operation on the display back panel to be printed. After the painting is completed, the operation stops, and the printed display back panel is obtained.

[0022] Step Six: The upper cover is raised by the lifting mechanism, the lower cover is lowered by the lifting mechanism, and the connecting rod is rotated by the rotating mechanism to move the X-shaped rotating frame along with the printed display back panel to the outside of the upper and lower covers. The printed display back panel can then be removed.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. In this invention, an upper cover and a lower cover are provided, and an X-shaped rotating frame and a corresponding air suction cup are provided between the upper cover and the lower cover. The X-shaped rotating frame and the air suction cup are used for adsorption, fixation and transportation of the display back panel. At the same time, a spray head, a drying air outlet and a paint spray head are provided inside the upper cover, which can effectively realize spray cleaning and paint printing operations, achieving the effect of two operations in the same cavity, reducing costs and material transportation time, and effectively improving work efficiency.

[0025] 2: In this invention, by setting up a number of first lifting rods and a number of second lifting rods, the first lifting rods control the lifting and lowering of the upper cover and the second lifting rods control the lifting and lowering of the lower cover, effectively realizing the flexible opening and closing of the upper and lower covers, making the display back panel convenient for loading and unloading.

[0026] 3: In this invention, by setting up a hydraulic cylinder and a U-shaped frame, the overall movement of the upper and lower covers can be achieved. By controlling the precise movement of the upper and lower covers, effective control of spray cleaning, spray painting and printing, and drying operations can be achieved. Attached Figure Description

[0027] Figure 1 This is an isometric view of the present invention;

[0028] Figure 2 This is a front view of the present invention;

[0029] Figure 3 This is a schematic diagram of the upper and lower covers of the present invention after they are separated;

[0030] Figure 4 This is a schematic diagram of the connecting rod after it has rotated out according to the present invention;

[0031] Figure 5This is a schematic diagram of the internal structure of the upper and lower covers of the present invention;

[0032] Figure 6 This is a schematic diagram of the X-shaped rotating frame of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0034] In the diagram: 1. Upper cover; 2. Lower cover; 3. X-shaped rotating frame; 4. Connecting rod; 5. Spray nozzle; 6. Drying air outlet; 7. Spray head; 8. U-shaped frame; 9. Cylindrical block; 10. Air suction cup; 11. First fastening knob; 12. Arc-shaped telescopic rod; 13. Fixed base; 14. Motor; 15. Exhaust vent; 16. Drain pipe; 17. Slide rail; 18. First lifting rod; 19. Second lifting rod; 20. Hydraulic cylinder; 21. Second fastening knob. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Reference Figure 1-7 A display back panel printing device with an insulating coating includes an upper cover 1 and a lower cover 2 aligned together. The upper cover 1 is rectangular in shape, and the lower cover 2 is funnel-shaped. When the upper cover 1 and lower cover 2 are combined, they form a cavity space. An X-shaped rotating frame 3 is provided between the upper cover 1 and the lower cover 2. The X-shaped rotating frame 3 is equipped with a suction cup mechanism for adsorbing and fixing the display back panel. A connecting rod 4 is horizontally fixed to the X-shaped rotating frame 3. A rotating mechanism matching the connecting rod 4 is provided on the outside of the upper cover 1 and the lower cover 2. The rotation of the connecting rod 4 drives the X-shaped rotating frame 3 to move, thereby changing the position of the display back panel. A paint spray head 5 is installed in the upper middle part of the upper cover 1. The paint spray head 5 is connected to an external pipe for spraying paint, that is, spraying insulating varnish on the display back panel. The insulating varnish is resin mixed with ink. The interior of the upper cover 1 and the lower cover 2 is coated with a varnish-repellent material. The paint spray head 5 is equipped with a drying air outlet 6 and a spray head 7 on the left and right sides respectively. The drying air outlet 6 is used to blow air to dry the display back panel, and the spray head 7 is used to spray and clean the display back panel.

[0037] Both sides of the upper cover 1 and the lower cover 2 are equipped with U-shaped frames 8. Each U-shaped frame 8 is equipped with a lifting mechanism that matches the upper cover 1 and the lower cover 2. The two U-shaped frames 8 also provide support for the upper cover 1 and the lower cover 2 through the lifting mechanism. One end of the upper cover 1 and the lower cover 2 is equipped with a moving mechanism that matches the two U-shaped frames 8. The moving mechanism is used to smoothly move the two U-shaped frames 8, thereby enabling the upper cover 1 and the lower cover 2 to move as a whole.

[0038] As a technical optimization of the present invention, the suction cup mechanism includes cylindrical blocks 9 fixedly connected to the four ends of the X-shaped rotating frame 3. The cylindrical blocks 9 are vertically arranged, and the upper end of the cylindrical blocks 9 is connected to a suction cup 10 via a ball joint. The suction cup 10 is connected via the ball joint and can rotate arbitrarily. The suction cup 10 achieves the suction effect through an air pipe and a vacuum generator. The air pipe can be embedded inside the connecting rod 4.

[0039] As a technical optimization of the present invention, all four support rods of the X-shaped rotating frame 3 are telescopic and are equipped with a first fastening knob 11, which is used to fix the support rods of the X-shaped rotating frame 3 after telescopic adjustment. An arc-shaped telescopic rod 12 connects two support rods and is equipped with a second fastening knob 21. The angle between the two support rods of the X-shaped rotating frame 3 can be adjusted by telescopically extending the arc-shaped telescopic rod 12, and after adjustment, it can be fixed by tightening the second fastening knob 21. The X-shaped rotating frame 3 can flexibly adjust the position of the four air suction cups 10, so that the four air suction cups 10 can effectively correspond to the flat position of the display back panel, and can match display back panels of different specifications, achieving adsorption and fixation of display back panels of different specifications.

[0040] As an optimized technical solution of the present invention, the rotating mechanism includes a fixed base 13, which is located at one end of the upper cover 1 and the lower cover 2. The fixed base 13 has a slot that matches the connecting rod 4. One end of the connecting rod 4 is located in the slot and is rotatably connected to the fixed base 13. The fixed base 13 provides stable support for the connecting rod 4. A motor 14 is fixed to the upper end of the fixed base 13. The power transmission shaft of the motor 14 is fixedly connected to the connecting rod 4, that is, the motor 14 can drive the connecting rod 4 to rotate around one end as the axis. The side wall of the lower cover 2 has a slot that matches the connecting rod 4, which serves to position the connecting rod 4.

[0041] As a technical optimization of the present invention, the lengths of the paint spray head 5, the drying air outlet 6, and the spray head 7 are all the same as the width of the upper cover 1. The paint spray head 5 can achieve a comprehensive painting effect, the drying air outlet 6 can achieve an effective drying effect, and the spray head 7 can achieve a comprehensive cleaning effect.

[0042] As a technical optimization of the present invention, the upper cover 1 is provided with an exhaust port 15 at the top, and the lower cover 2 is connected to a drain pipe 16 at the bottom. The exhaust port 15 is connected to an external air duct and is used to exhaust air when the drying air outlet 6 blows air for drying, while the drain pipe 16 is used to drain water when the spray head 7 sprays.

[0043] As a technical optimization of the present invention, the U-shaped frame 8 is arranged horizontally with its opening facing the fixed base 13. The lower side of both U-shaped frames 8 is provided with slide rails 17, and the U-shaped frame 8 is slidably connected to the slide rails 17. The slide rails 17 are fixed to the ground and play a stable supporting role for the U-shaped frame 8, so that the U-shaped frame 8 can move smoothly.

[0044] As a technical optimization of the present invention, the lifting mechanism includes a plurality of first lifting rods 18 and a plurality of second lifting rods 19, which are evenly arranged on two U-shaped frames 8. The two ends of the first lifting rods 18 are fixedly connected to the upper cover 1 and the upper side of the U-shaped frame 8, respectively, meaning the plurality of first lifting rods 18 are evenly arranged on the upper part of the U-shaped frame 8. The two ends of the second lifting rods 19 are fixedly connected to the lower cover 2 and the lower side of the U-shaped frame 8, respectively, meaning the plurality of second lifting rods 19 are evenly arranged on the lower part of the U-shaped frame 8. The upper cover 1 and the lower cover 2 are slidably connected to the two U-shaped frames 8 on both sides, and the slidable connection restricts and stabilizes the upper cover 1 and the lower cover 2.

[0045] As a technical optimization of the present invention, the moving mechanism includes a horizontally arranged hydraulic cylinder 20, located at the end away from the fixed base 13. The hydraulic cylinder 20 is fixedly supported by a support frame, and the two U-shaped frames 8 are fixedly connected on their sides by a horizontal rod, which serves to stabilize the connection. The telescopic end of the hydraulic cylinder 20 is fixedly connected to the side of the horizontal rod. The hydraulic cylinder 20 can drive the two U-shaped frames 8 to move as a whole, that is, drive the upper cover 1 and the lower cover 2 to move as a whole. The function of the two U-shaped frames 8 is to make the upper cover 1 and the lower cover 2 move synchronously.

[0046] A method for printing a display back panel with an insulating coating, the method comprising the following steps:

[0047] Step 1: The display back panel to be printed is attached to the X-shaped rotating frame 3 by suction cup mechanism. The upper cover 1 is raised by lifting mechanism, the lower cover 2 is lowered by lifting mechanism, and the connecting rod 4 is rotated by rotating mechanism to move the X-shaped rotating frame 3 and the display back panel to be printed on it between the upper cover 1 and the lower cover 2.

[0048] Step 2: The upper cover 1 is lowered by the lifting mechanism, and the lower cover 2 is raised by the lifting mechanism. The upper cover 1 and the lower cover 2 are combined, and the display back panel to be printed is located inside the space between the upper cover 1 and the lower cover 2.

[0049] Step 3: The moving mechanism drives the upper cover 1 and the lower cover 2 to move to one end as a whole. While moving, the spray head 7 sprays water to clean the display back panel to be printed. After cleaning, the movement stops.

[0050] Step 4: The moving mechanism drives the upper cover 1 and the lower cover 2 to move to the other end as a whole. At the same time, the drying air outlet 6 blows air to dry the display back panel to be printed. After drying is completed, the movement stops.

[0051] Step 5: The moving mechanism drives the upper cover 1 and the lower cover 2 to move back and forth as a whole. While moving, the paint spray head 5 performs the painting operation to paint the display back panel to be printed. After the painting is completed, the operation stops, and the printed display back panel is obtained.

[0052] Step Six: The upper cover 1 rises via the lifting mechanism, the lower cover 2 descends via the lifting mechanism, and the connecting rod 4 rotates via the rotating mechanism to move the X-shaped rotating frame 3, along with the printed display back panel on it, to the outside of the upper cover 1 and the lower cover 2. The printed display back panel can then be removed.

[0053] In use, the display back panel to be printed is placed on the X-shaped rotating frame 3, and the display back panel is fixed by the air suction cup 10. The motor 14 drives the connecting rod 4 to rotate, rotating the X-shaped rotating frame 3 between the upper cover 1 and the lower cover 2. Several first lifting rods 18 lower the upper cover 1, and several second lifting rods 19 raise the lower cover 2, with the upper cover 1 and lower cover 2 enclosing the display back panel in the middle. Then, the hydraulic cylinder 20 moves the upper cover 1 and lower cover 2 to the right as a whole. During the movement, the spray head 7 sprays water to clean the display back panel, removing any debris that may be present on the side to be printed. After cleaning, the movement stops, and the display back panel is now on the right side. Then, the hydraulic cylinder 20 moves the upper cover 1 and lower cover 2 to the left as a whole. During the movement, the drying air outlet 6 blows air to dry the display back panel. During the drying process, the direction of movement ensures that the drying air outlet 6 can move from one end of the display back panel to the other, achieving complete drying. After drying, the movement stops. Then, the hydraulic cylinder 20 drives the upper cover 1 and the lower cover 2 to move back and forth as a whole. While moving, the paint spray head 5 performs a painting operation on the display back panel to be printed, finally obtaining the printed display back panel. This reduces costs and material transportation time, effectively improving work efficiency. After printing is completed, several first lifting rods 18 move to lift the upper cover 1, and several second lifting rods 19 move to lower the lower cover 2. The motor 14 drives the connecting rod 4 to rotate, rotating the X-shaped rotating frame 3 to the outside of the upper cover 1 and the lower cover 2. At this time, the printed display back panel can be removed.

[0054] When adsorbing and fixing the display back panel, the positions of the four air suction cups 10 can be adjusted according to the specifications of the display back panel, facilitating subsequent continuous processing of display back panels of this specification. Specifically, the position of the air suction cups 10 is adjusted using the support rods of the telescopic X-shaped rotating frame 3, and then tightened using the corresponding first fastening knob 11 after adjustment. The angle between the two support rods of the X-shaped rotating frame 3 is adjusted using the telescopic arc-shaped telescopic rod 12, and then fixed by tightening the second fastening knob 21. The goal is to ensure that the four air suction cups 10 are effectively aligned with the flat position of the display back panel. Simultaneously, the air suction cups 10 are connected via ball joints, allowing for arbitrary rotation to effectively adapt to any curvature of the display back panel, thereby effectively achieving the adsorption and fixing effect.

[0055] Meanwhile, when the upper cover 1 and the lower cover 2 move as a whole, the slots on the side wall of the lower cover 2 that match the connecting rod 4 effectively fit the side of the connecting rod 4, so that the upper cover 1 and the lower cover 2 always maintain a closed effect when they move, thus preventing the painting and spraying operations inside the upper cover 1 and the lower cover 2 from causing pollution to spread outwards.

[0056] Furthermore, both the spray cleaning and painting operations are performed within the upper cover 1 and the lower cover 2. During spraying, the paint on the side walls of the upper cover 1 and the lower cover 2 can be washed away. The paint on the side walls of the upper cover 1 and the lower cover 2 is the leftover material generated during the painting process of the previous display back panel.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A display backplate printing apparatus with an insulating coating, comprising an upper cover (1) and a lower cover (2) aligned together, characterized in that, An X-shaped rotating frame (3) is provided between the upper cover (1) and the lower cover (2). A suction cup mechanism is provided on the X-shaped rotating frame (3). A connecting rod (4) is fixed horizontally on the X-shaped rotating frame (3). A rotating mechanism matching the connecting rod (4) is provided on the outside of the upper cover (1) and the lower cover (2). A paint spray head (5) is installed in the middle of the upper side inside the upper cover (1). A drying air outlet (6) and a spray head (7) are provided on the left and right sides of the paint spray head (5). Both sides of the upper cover (1) and the lower cover (2) are provided with U-shaped frames (8), and both U-shaped frames (8) are provided with lifting mechanisms that match the upper cover (1) and the lower cover (2). One end of the upper cover (1) and the lower cover (2) is provided with a moving mechanism that matches the two U-shaped frames (8). The rotating mechanism includes a fixed seat (13), which is located at one end of the upper cover (1) and the lower cover (2). The fixed seat (13) is provided with a slot that matches the connecting rod (4). One end of the connecting rod (4) is located in the slot and is rotatably connected to the fixed seat (13). A motor (14) is fixed at the upper end of the fixed seat (13). The power transmission shaft of the motor (14) is fixedly connected to the connecting rod (4). The side wall of the lower cover (2) is provided with a slot that matches the connecting rod (4). The U-shaped frame (8) is arranged horizontally and its opening faces the fixed seat (13). The lower side of both U-shaped frames (8) is provided with slide rails (17), and the U-shaped frame (8) is slidably connected to the slide rails (17). The lifting mechanism includes a plurality of first lifting rods (18) and a plurality of second lifting rods (19). The plurality of first lifting rods (18) and the plurality of second lifting rods (19) are evenly arranged on two U-shaped frames (8). The two ends of the first lifting rods (18) are fixedly connected to the upper cover (1) and the upper side of the U-shaped frame (8) respectively. The two ends of the second lifting rods (19) are fixedly connected to the lower cover (2) and the lower side of the U-shaped frame (8) respectively. The upper cover (1) and the lower cover (2) are slidably connected to the two U-shaped frames (8) on both sides respectively. The moving mechanism includes a horizontally arranged hydraulic cylinder (20), which is located at one end away from the fixed seat (13). The hydraulic cylinder (20) is fixedly supported by a support frame. The two U-shaped frames (8) are fixedly connected on the sides by a horizontal rod. The telescopic end of the hydraulic cylinder (20) is fixedly connected to the side of the horizontal rod.

2. The display backplate printing device with insulating coating according to claim 1, characterized in that, The suction cup mechanism includes cylindrical blocks (9) that are fixedly connected to the four ends of the X-shaped rotating frame (3). The cylindrical blocks (9) are vertically arranged, and the upper end of the cylindrical blocks (9) is connected to a suction cup (10) via a ball shaft.

3. The display backplate printing device with insulating coating according to claim 2, characterized in that, The four support rods of the X-shaped rotating frame (3) are all telescopic and are equipped with a first fastening knob (11). An arc-shaped telescopic rod (12) is connected between two support rods and is equipped with a second fastening knob (21).

4. The display backplate printing device with insulating coating according to claim 1, characterized in that, The lengths of the paint spray head (5), the drying air outlet (6), and the spray head (7) are all the same as the width of the upper cover (1).

5. The display backplate printing device with insulating coating according to claim 1, characterized in that, The upper cover (1) has an exhaust vent (15) at the top, and the lower cover (2) has a drain pipe (16) at the bottom.

6. A method for printing a display back panel with an insulating coating, characterized in that, The method, used in any one of claims 1-5, comprises the following steps: Step 1: The display back panel to be printed is attached to the X-shaped rotating frame (3) by suction cup mechanism. The upper cover (1) is raised by lifting mechanism, the lower cover (2) is lowered by lifting mechanism, and the connecting rod (4) is rotated by rotating mechanism to move the X-shaped rotating frame (3) and the display back panel to be printed on it between the upper cover (1) and the lower cover (2). Step 2: The upper cover (1) is lowered by the lifting mechanism, and the lower cover (2) is raised by the lifting mechanism. The upper cover (1) and the lower cover (2) are combined, and the display back panel to be printed is located inside the space between the upper cover (1) and the lower cover (2). Step 3: The moving mechanism drives the upper cover (1) and the lower cover (2) to move to one end as a whole. While moving, the spray head (7) sprays water to clean the display back panel to be printed. After cleaning, the movement stops. Step 4: The moving mechanism drives the upper cover (1) and the lower cover (2) to move to the other end as a whole. While moving, the drying air outlet (6) blows air to dry the display back panel to be printed. After drying is completed, the movement stops. Step 5: The moving mechanism drives the upper cover (1) and the lower cover (2) to move back and forth as a whole. While moving, the paint spray head (5) performs the painting operation to paint the display back panel to be printed. After the painting is completed, the operation stops and the printed display back panel is obtained. Step 6: The upper cover (1) is raised by the lifting mechanism, the lower cover (2) is lowered by the lifting mechanism, and the connecting rod (4) is rotated by the rotating mechanism to move the X-shaped rotating frame (3) along with the printed display back panel on it to the outside of the upper cover (1) and the lower cover (2). The printed display back panel can then be removed.

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