Material turnover device applied to UV printing materials and UV printing equipment thereof

Abstract

The utility model relates to the field of UV printing equipment, in particular to a material turnover device applied to UV printing materials and UV printing equipment comprising the same, the material turnover device comprises a frame, a lifting mechanism, a turnover mechanism, a clamping mechanism and a positioning mechanism, the clamping mechanism is rotatably connected with the turnover mechanism, and the turnover mechanism drives the clamping mechanism to rotate so as to turn over the materials; and the first conveying belt is matched for conveying the materials to pass through the UV printing equipment again for printing the double-face surfaces of the materials, and the material printing efficiency can be effectively improved through automatic turnover and accurate positioning. Therefore, the problems that the double-sided printing operation of the fan blade in the UV printing equipment is inconvenient, the turned-over material is not accurately positioned manually, and the printing efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of UV printing equipment, concretely relates to a material turnover device for UV printing material and UV printing equipment thereof.

BACKGROUND

[0002] In modern industrial production, especially in the application of UV printing process on the surface of the fan, reducing manual intervention to improve production efficiency and product quality is the key direction of industry development. The traditional UV printing process usually relies on manual operation to turn over the fan for double-sided printing, which cannot realize automatic turnover and double-sided printing, resulting in low production efficiency and unable to meet the needs of mass production, which not only increases the production cost, but also easily leads to operation errors, uneven spraying, pattern skew and other defective products, thereby affecting the spraying quality and production efficiency of the fan. In addition, the existing turnover device often cannot accurately control the position of the material during the turnover process, resulting in inaccurate position of the material after turnover, affecting the quality and efficiency of subsequent processing.

[0003] In view of the problems of the traditional turnover device, such as inconvenient operation, inaccurate positioning and low printing efficiency, the utility model is hereby researched and proposed.

UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a material turnover device for UV printing material and UV printing equipment thereof, including frame, lifting mechanism, turnover mechanism, clamping mechanism, positioning mechanism, through clamping mechanism and turnover mechanism rotation connection, and by turnover mechanism drive clamping mechanism rotation to turn over the material, cooperate first conveying belt and convey material again through UV printing equipment to the double-sided surface of the material printing, can effectively improve the double-sided printing efficiency. Thus, the problem of inconvenient operation, inaccurate positioning of the material by manual after turning over and low printing efficiency of the fan in the UV printing equipment is solved.

[0005] In order to solve the above technical problems, the utility model provides a material turnover device applied to UV printing material, the material turnover device is matched with the UV printing device, the UV printing device includes first conveying belt and UV printing mechanism which is arranged above first conveying belt, its characterized in be that the material turnover device includes the frame for supporting whole material turnover device and the lifting mechanism for lifting material to preset height which is arranged on the frame, the material turnover device still includes the turnover mechanism for overturning material which is arranged on crossbeam, the clamping mechanism for clamping material which is matched with crossbeam rotation, and the positioning mechanism for detecting whether material enters the working area of clamping mechanism which is arranged in material turnover device, the clamping mechanism is used for clamping the material conveyed in first conveying belt and overturns to make material pass through first conveying belt and cooperate with UV printing mechanism again, the clamping mechanism is connected with turnover mechanism, and the clamping mechanism is driven to rotate by turnover mechanism to overturn material.

[0006] As the above-mentioned material turnover device applied to UV printing material, the lifting mechanism includes the support frame arranged on the frame, and the crossbeam which is slidably matched with the support frame, the lifting mechanism further includes the lifting assembly arranged on the support frame for driving the crossbeam to move up and down.

[0007] As the above-mentioned material turnover device applied to UV printing material, the clamping mechanism is provided with a plurality of and arranged side by side on the crossbeam, and the clamping mechanism is connected with the turnover mechanism, and the clamping mechanism is driven to rotate synchronously by the turnover mechanism to overturn the material.

[0008] As the above-mentioned material turnover device applied to UV printing material, the clamping mechanism includes a pair of clamping arms for clamping the material and a first driving part for driving the clamping arms to move, the clamping mechanism further includes a rotating shaft which is rotatably connected with the crossbeam and a connecting seat which is fixedly arranged on one end of the rotating shaft, the first driving part and the clamping arms are arranged on the connecting seat, the other end of the rotating shaft is formed with a gear part, and the turnover mechanism drives the gear part to rotate to drive the clamping mechanism to overturn.

[0009] As the above-mentioned material turnover device applied to UV printing material, the turnover mechanism includes a rack which is slidably connected with the crossbeam and a second driving part which is arranged on the crossbeam for driving the rack to reciprocate along the length direction of the crossbeam, and the rack is engaged with the corresponding gear part.

[0010] As the above-mentioned material turnover device applied to UV printing material, the second driving part includes a motor and a transmission gear, the transmission gear is arranged on the output shaft of the motor and is engaged with the rack, the motor drives the transmission gear to rotate to drive the rack to reciprocate along the length direction of the crossbeam, and then drives the gear part to rotate to realize the overturning of the clamping mechanism.

[0011] The positioning mechanism comprises a sensor arranged on the clamping mechanism, the sensor is used for collecting a material position signal and is electrically connected with the material turnover device, the sensor can judge whether the material reaches the working area of the clamping mechanism, and after confirming that the material reaches the working area, the clamping action of the clamping mechanism is started.

[0012] The lifting assembly comprises two guide rods which are respectively in sliding fit with two ends of the cross beam, two lead screws which are respectively in threaded fit with left and right ends of the cross beam, and a third driving component arranged on one side of the support frame and used for driving the two lead screws to rotate synchronously and thus driving the cross beam to move up and down.

[0013] The clamping arm is provided with an anti-skid part on a contact surface for increasing friction.

[0014] The application also relates to a UV printing device which comprises a UV printing device and the above-mentioned material turnover device.

[0015] Compared with the prior art, the material turnover device applied to UV printing material has the following advantages.

[0016] 1. The clamping mechanism, the turnover mechanism and the lifting mechanism are closely matched to realize that the clamping mechanism clamps the material to be turned over by 180 degrees and accurately falls back on the first conveying belt to continue to complete printing on the other side.

[0017] 2. The gear parts in each clamping mechanism are respectively in meshing fit with the racks in the turnover mechanism and are synchronously driven by the second driving component in the turnover mechanism to turn over the clamping mechanism and the material clamped thereby, the cooperation mode reduces manual intervention, ensures that multiple materials are simultaneously and accurately turned over, has accurate turning and improves the working efficiency of the printing process.

[0018] 3. The positioning mechanism utilizes the sensor technology to monitor the position of the material in real time and ensures that the material is accurately grabbed by the clamping mechanism at the predetermined position, thereby realizing efficient and accurate automatic operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0020] Figure 1 is one of the structural schematic diagrams of the UV printing equipment in the present application;

[0021] Figure 2 is the second structural schematic diagram of the UV printing equipment in the present application;

[0022] Figure 3 is a partial schematic diagram of the material turnover device in the present application;

[0023] Figure 4 is a partial enlarged view of A in the present application; Figure 1

[0024] Figure 5 is a partial enlarged view of B in the present application; Figure 1

[0025] Figure 6 is a partial enlarged view of C in the present application; Figure 3

[0026] Figure 7 is a structural schematic diagram of the clamping mechanism in the material turnover device in the present application;

[0027] Figure 8 is the third structural schematic diagram of the material turnover device in the present application;

[0028] Figure 9 is a partial enlarged view of D in the present application. Figure 8 In the drawings:

[0029] 1, rack;

[0030] 2, lifting mechanism; 21, support frame; 22, cross beam; 221, limiting groove; 222, flange part; 23, lifting assembly; 231, guide rod; 232, screw rod; 233, third driving part; 241, synchronous wheel; 242, synchronous belt;

[0031] 3, turnover mechanism; 31, rack; 32, second driving part; 321, motor; 322, transmission gear;

[0032] 4, clamping mechanism; 41, clamping arm; 42, first driving part; 43, rotating shaft; 44, connecting seat; 45, gear part; 46, anti-skid part;

[0033]

[0034] ​​​​5, positioning mechanism; 51, sensor;

[0035] 61, first conveying belt; 62, second conveying belt;

[0036] 7, UV printing device; 71, UV printing mechanism; 72, material overturning device.

DETAILED DESCRIPTION

[0037] The material overturning device 72 cooperates with the UV printing device 7, and the UV printing device 7 comprises the first conveying belt 61 and the UV printing mechanism 71 arranged above the first conveying belt 61. The material overturning device 72 comprises a rack 1 for supporting the whole material overturning device 72, a lifting mechanism 2 arranged on the rack 1 for lifting the material to a preset height, an overturning mechanism 3 arranged on the lifting mechanism for overturning the material, and a clamping mechanism 4 arranged on the lifting mechanism for clamping the material. The material overturning device 72 further comprises a positioning mechanism 5 arranged on the clamping mechanism 4 for detecting whether the material enters the working area of the clamping mechanism 4. The clamping mechanism 4 is connected with the overturning mechanism 3 and is driven by the overturning mechanism 3 to rotate the clamping mechanism 4 so as to overturn the material. The clamping mechanism 4 clamps the material conveyed by the first conveying belt 61 to overturn the material so that the material passes through the first conveying belt 61 again to cooperate with the UV printing mechanism 71. The lifting mechanism 2 comprises a support frame 21 arranged on the rack 1 and a cross beam 22 slidingly fitted on the support frame 21. The lifting mechanism 2 further comprises a lifting assembly 23 arranged on the support frame 21 for driving the cross beam 22 to move up and down.

[0038] The material enters the printing device first, and is printed on one side by the printing device. The material is conveyed to the material overturning device 72 by being carried on the first conveying belt 61. The material overturning device 72 lifts the material to an appropriate height by the lifting mechanism 2, then fixes the material by the clamping mechanism 4, and overturns the material by 180 degrees by the overturning mechanism 3. The overturning mechanism 3 can drive the clamping mechanism 4 to rotate by an angle ranging from 0 degrees to 360 degrees. The overturned material can be placed on the first conveying belt 61 of the UV printing device 7 again, and the surface of the overturned material is continuously printed by UV printing. The positioning mechanism 5 ensures that the material accurately enters the working area of the clamping mechanism 4, and ensures that the overturning process proceeds smoothly. As shown in FIG. 2, specifically, the clamping mechanism 4 is located at the end of the first conveying belt 61, and the clamping arms 41 are in an open state to form a region for accommodating the material. When the material is conveyed to the working area to be clamped by the first conveying belt 61, a part of the material protrudes from the edge of the first conveying belt 61, but does not affect the overall balance of the material. At this time, the conveying belt continues to support the material until the clamping mechanism 4 clamps the material and the material is lifted upward from the first conveying belt 61 by the lifting assembly 23, and then the overturning operation is performed. Figures 1 to 9 ​

[0039] The controller (not shown in the figure) for controlling the operation of each mechanism is also included in the material overturning device 72. The set height in the lifting mechanism 2 can be preset by operating the controller according to the space required for material overturning.

[0040] The material overturning device 72 involved in the present application cooperates with the UV printing device 7 for printing, and is not limited to only acting on the double-sided printing of the front and back surfaces of the fan leaf. It is also applicable to the process treatment of printing on the surfaces of various plastic parts, plates and other materials. When multiple surfaces need to be printed, the overturning mechanism 3 can control the material to overturn multiple times to cooperate with the UV printing device 7 to complete the printing of multiple surfaces of the material.

[0041] Among them, the common UV printing equipment mainly includes a print head, an ink supply system, a conveying belt, a curing lamp and a motion guide rail and the like. The print head is responsible for ejecting ink onto the printing material to form a pattern, and is composed of countless tiny nozzles. The curing lamp is used for curing the ink, which emits ultraviolet rays of a specific wavelength to quickly cure the ink, avoiding the ink from contacting dust and affecting the firmness of the pattern. The conveying belt is responsible for conveying the printing material to the printing position and moving it out of the equipment after printing. This UV printing equipment belongs to the content of the prior art, and therefore will not be described in more detail.

[0042] The material is conveyed out of the UV printing device 7 on the first conveying belt 61, completes the printing of one side, and then overturns the material through the material overturning device 72. Subsequently, the material is sent back to the UV printing device 7 again in cooperation with the first conveying belt 61 to complete the double-sided printing of the material. This process is realized through the close cooperation of the added clamping mechanism 4, overturning mechanism 3 and lifting mechanism 2. The clamping mechanism 4 ensures stable clamping of the material during overturning, the overturning mechanism 3 completes accurate 180-degree overturning, and the lifting mechanism 2 adjusts the height of the material when needed to ensure that it accurately falls back on the first conveying belt 61 to continue printing the other side. The structure design is stable and reliable, effectively improves the quality and efficiency of double-sided printing of the material, and at the same time avoids the problem of inaccurate positioning of the overturned material by manual operation, saving labor costs.

[0043] As shown in Figures 1 to 9 As a further technical solution of the present application, the clamping mechanism 4 is provided with multiple clamping mechanisms 4 arranged side by side on the cross beam 22, and the clamping mechanisms 4 are connected with the overturning mechanism 3 and driven by the overturning mechanism 3 to rotate synchronously to overturn the material. In this technical solution, a plurality of overturning mechanisms 3 are provided to cooperate with the clamping mechanisms 4. Each clamping mechanism 4 is connected with the overturning mechanism 3, which provides power to make all clamping mechanisms 4 rotate synchronously, thereby realizing the overturning of the material and ensuring the stability of the material during overturning and improving the operation efficiency.

[0044] As shown in Figures 1 to 9 As a further technical solution of the present application, the clamping mechanism 4 each includes a pair of clamping arms 41 for clamping materials and a first driving component 42 for driving the clamping arms 41 to move, and further includes a rotating shaft 43 in rotational cooperation with the cross beam 22 and a connecting seat 44 fixed to one end of the rotating shaft 43, the first driving component 42 and the clamping arms 41 are arranged on the connecting seat 44, and the other end of the rotating shaft 43 is formed with a gear part 45, and the turnover mechanism 3 drives the gear part 45 to rotate to drive the entire clamping mechanism 4 to turn over. The turnover mechanism 3 includes a rack 31 in sliding cooperation with the cross beam 22 and a second driving component 32 arranged on the cross beam 22 for driving the rack 31 to reciprocate along the length direction of the cross beam 22, and the rack 31 is engaged with the corresponding gear part 45.

[0045] Specifically, the clamping mechanism 4 is further provided with a bearing, the outer shell of the bearing is fixedly connected with the cross beam 22, the rotating shaft 43 is arranged in the bearing, and the rotating shaft 43 rotates in cooperation with the bearing, so as to reduce the friction between the rotating shaft 43 and the bearing and prolong the service life.

[0046] The first driving component 42 can adopt a transmission mode of a cylinder and a push rod in cooperation, the cylinder is fixed on the connecting seat 44, the push rod is connected with the clamping arm 41, and the push rod is driven by the cylinder to move linearly to drive the clamping arm 41 to grab and drop the materials. In addition, the first driving component 42 can also adopt a transmission mode of a motor 321 and a transmission wheel in cooperation. It should be noted that the above-mentioned driving modes of the cylinder and the motor 321 belong to the driving modes well known to those skilled in the art, and therefore will not be further described here.

[0047] In the present technical solution, the gear part 45 in each clamping mechanism 4 is engaged with the rack 31 in the turnover mechanism 3, the rack 31 is driven by the second driving component 32 in the turnover mechanism 3 to reciprocate along the length direction of the cross beam 22 to drive the gear part 45 to rotate to drive the entire clamping mechanism 4 to turn over, so that the clamping mechanism 4 and the materials clamped thereby can be synchronously turned over, and the engagement mode of the rack 31 track and the gear part 45 makes the turnover precision high and the position offset-free, the structure is simple and stable, ensures that multiple materials are accurately turned over at the same time, has the advantages of accurate turnover and accurate positioning, and improves the working efficiency of the printing process.

[0048] As shown in Figures 1 to 9As shown, as a further technical solution of the present application, a limiting groove 221 is formed on the cross beam 22, and the rack 31 is in sliding fit with the limiting groove 221. The two sides of the limiting groove 221 are inwardly protruded to form a flange part 222. The rack 31 is in size fit with the limiting groove 221 and is embedded in the limiting groove 221. The accommodating groove limits the rack 31 in the accommodating groove through the flange part 222, and the rack 31 slides left and right in the length direction of the accommodating groove. The length of the accommodating groove is greater than the length of the rack 31. Specifically, the second driving component 32 is fixedly arranged on the cross beam 22 and includes a motor 321 and a transmission gear 322. The transmission gear 322 is arranged on the output shaft of the motor 321 and is in mesh with the rack 31. The motor 321 drives the transmission gear 322 to rotate to drive the rack 31 to reciprocate along the length direction of the cross beam 22, and further drives the gear part 45 to rotate to realize the overturning of the clamping mechanism 4. In the technical solution, the motor 321 drives the transmission gear 322 to rotate to drive the rack 31 to cooperate with the accommodating groove to move relatively with the cross beam 22. The sliding stroke of the rack 31 corresponds to the meshing stroke of the rack 31 and the gear part 45 in the clamping mechanism 4, so that the driving part structure of the overturning mechanism 3 is more simple and effective.

[0049] As shown, Figures 1 to 9 As a further technical solution of the present application, the positioning mechanism 5 includes a sensor 51 arranged on the clamping mechanism 4. The sensor 51 is used to collect material position signals and is electrically connected with the material overturning device 72. The sensor 51 can judge whether the material reaches the working area of the clamping mechanism 4 and start the clamping action of the clamping mechanism 4 after confirming that the material reaches the working area. The sensor 51 can adopt a laser sensor 51. The laser sensor 51 is arranged on the contact surface of the clamping arm 41 and the material. The laser sensor 51 measures the distance change of the opening of the clamping arm 41 to judge whether the object enters the working area of the clamping mechanism 4 by emitting laser and receiving scattered light, and transmits the information to the material overturning device 72, and further sends a command to start the clamping action to the controller of the equipment. The positioning mechanism 5 uses the sensor 51 technology to monitor the material position in real time, ensures that the material is accurately grabbed by the clamping mechanism 4 at the predetermined position, and realizes efficient and accurate automatic operation.

[0050] In order to avoid the material from falling during the overturning process to cause damage, the anti-skid part 46 for increasing friction is arranged on the contact surface of the clamping arm 41 and the material, so as to increase the interaction force between the material and the clamping arm 41, and make the clamping action of the clamping mechanism 4 more stable. The clamping force of the clamping arm 41 can also be adjusted by adjusting the torque of the third driving component 233 to adapt to materials of different materials and weights, so as to avoid that the material is deformed due to clamping too tightly or the material falls off due to clamping too loosely.

[0051] As shown, Figures 1 to 9As shown, as a further technical solution of the present application, the lifting assembly 23 includes guide rods 231 that are in sliding fit with the two ends of the cross beam 22, and two lead screws 232 that are in threaded fit with the left and right ends of the cross beam 22, and further includes a third driving component 233 arranged on one side of the support frame 21 for driving the two lead screws 232 to rotate synchronously and in turn driving the cross beam 22 to move up and down. The upper ends of the guide rods 231 are fixedly connected to the upper part of the support frame 21, the lower ends of the guide rods 231 are fixedly connected to the lower part of the rack 1, the upper ends of the lead screws 232 are in rotary fit with the upper part of the support frame 21, and the lower ends of the lead screws 232 are in rotary fit with the lower part of the rack 1.

[0052] The support frame 21 can be a gantry frame, which includes a horizontal cross beam arranged above the rack 1, and two vertical posts vertically arranged on the rack 1, the vertical posts being used for supporting the cross beam. The cross beam serves as the main supporting platform of the whole turnover device, and has sufficient strength and rigidity to withstand various forces generated during the turnover of the materials. The vertical posts transmit the forces received by the cross beam to the rack 1, thereby maintaining the balance and stability of the whole structure. The vertical posts and the cross beam are fixedly connected by welding or fasteners for locking. The fasteners are common technical solutions understood by those skilled in the art in the prior art. The gantry frame not only ensures the stability during the turnover of the materials, but also can adapt to materials of different sizes and weights, and has good versatility and adaptability.

[0053] In addition, the third driving component 233 includes a motor 321 and a synchronous belt 242. The motor 321 is arranged on one side of the support frame 21, and synchronous pulleys 241 are arranged on the upper parts of the two lead screws 232. The synchronous belt 242 is wound around the two synchronous pulleys 241, thereby connecting the two lead screws 232 and making them rotate synchronously, which improves the transmission efficiency and reliability of the lifting assembly 23. The motor 321 drives one of the lead screws 232 to rotate through the synchronous pulley 241 and the synchronous belt 242 or a shaft coupling (not shown in the figure). It should be noted that the above-mentioned shaft coupling for connecting the two lead screws 232 to make them rotate together and transmit torque belongs to the prior art.

[0054] Further, the lifting assembly 23 further includes a self-locking mechanism (not shown in the figure). The self-locking mechanism is engaged by a worm gear (not shown in the figure), and the worm gear is driven to rotate by the motor 321. A sensor 51 is used to monitor the position in real time, thereby achieving precise positioning and reverse unlocking. It should be noted that the self-locking mechanism of the lifting assembly 23 in the lifting process is the prior art, and will not be described in detail here.

[0055] As shown in FIG. 2, the lifting assembly 23 includes a lifting mechanism 24 and a rotating mechanism 25. The lifting mechanism 24 is arranged on the cross beam 22, and the rotating mechanism 25 is arranged on the lifting mechanism 24. The lifting mechanism 24 is used to lift the rotating mechanism 25, and the rotating mechanism 25 is used to rotate the materials 2. Figures 1 to 9As shown, further, the second conveying belt 62 is also arranged below the material overturning device 72 and cooperates with the first conveying belt 61 to convey the printed material into the next process. The first conveying belt 61 and the second conveying belt 62 are gap-matched in the vertical direction, and the gap can accommodate the clamping mechanism 4 to clamp the material for overturning without interfering with the first conveying belt 61 and the second conveying belt 62.

[0056] Specifically, the first conveying belt 61 is electrically connected with the UV printing device 7 and carries the material on the first conveying belt 61 for bidirectional conveying.

[0057] The present application relates to a UV printing device, which comprises a UV printing device 7 and a material overturning device 72 as described above. The UV printing device 7 comprises a first conveying belt 61 and a UV printing mechanism 71 arranged on the first conveying belt 61. The material overturning device 72 is used to overturn the material conveyed by the first conveying belt 61 so that the material passes through the first conveying belt 61 again to cooperate with the UV printing mechanism 71, thereby completing the multi-surface printing of the material. The material overturning device 72 cooperates with the existing UV printing device 7 to complete the double-sided printing of the material.

[0058] The UV printing device is provided with a controller (not shown in the figure), which is used to control the working process of the UV printing device 7 and the material overturning device 72 and the cooperative work therebetween.

[0059] The UV printing device of the present application sends the material into the UV printing mechanism 71 for printing through the first conveying belt 61, and the material overturning device 72 is responsible for overturning the material printed on one side so that it passes through the first conveying belt 61 and the UV printing mechanism 71 again to complete the printing on the other side, thereby realizing the multi-surface printing function. The UV printing device of the present application can overturn the material, and for the material with multiple surfaces that need to be printed, the working process of repeated overturning and printing can be used to make the multiple surfaces receive printing, thereby compressing the printing time and effectively improving the printing efficiency.

[0060] Due to the characteristics of fast drying, bright color and strong durability, the UV printing technology is widely used in advertising, decoration, packaging and other industries. The traditional UV printing device can usually only print one side, while the UV printing device of the present application realizes the multi-surface printing of the material by introducing the material overturning device 72, greatly improving the printing efficiency and flexibility.

[0061] The working process of the UV printing device is as follows: firstly, the material is conveyed to the clamping mechanism 4 by the first conveying belt 61 for printing on one surface. Then, the material is turned over and continuously conveyed to the UV printing device by the first conveying belt 61 for printing on other surfaces. After the printing is completed, when the material passes through the material turning device 72 again, the lifting mechanism 2 drives the cross beam 22 to lift to avoid the material, so that the material falls from the first conveying belt 61 and is conveyed into the second conveying belt 62, and is conveyed into the next process through the second conveying belt 62. After the material turning device 72 is lifted and reset, the next batch of materials is waited. The whole UV printing process is highly automated, which improves the production efficiency and the printing quality.

Claims

1. A material flipping device for UV printing materials, the material flipping device (72) cooperating with a UV printing device (7), the UV printing device (7) including a first conveyor belt (61) and a UV printing mechanism (71) disposed above the first conveyor belt (61), characterized in that... The material flipping device (72) includes a frame (1) for supporting the entire material flipping device (72), a lifting mechanism (2) on the frame (1) for lifting the material to a preset height, a flipping mechanism (3) on the lifting mechanism for flipping the material, and a clamping mechanism (4) on the lifting mechanism for clamping the material. The material flipping device (72) also includes a positioning mechanism (5) on the clamping mechanism (4) for detecting whether the material has entered the working area of ​​the clamping mechanism (4). The clamping mechanism (4) is connected to the flipping mechanism (3) and is driven by the flipping mechanism (3) to rotate and flip the material. The clamping mechanism (4) clamps the material conveyed by the first conveyor belt (61) and flips it so that the material can be used again by the UV printing mechanism (71) through the first conveyor belt (61).

2. The material flipping device for UV printing materials according to claim 1, characterized in that... The lifting mechanism (2) includes a support frame (21) mounted on the frame (1) and a crossbeam (22) that slides vertically with the support frame (21). The lifting mechanism (2) also includes a lifting assembly (23) mounted on the support frame (21) for driving the crossbeam (22) to move vertically.

3. A material flipping device for UV printing materials according to claim 2, characterized in that... The clamping mechanism (4) is provided in multiple and arranged in parallel on the crossbeam (22), and several of the clamping mechanisms (4) are connected to the flipping mechanism (3), and the flipping mechanism (3) drives several of the clamping mechanisms (4) to rotate synchronously to flip the material.

4. A material flipping device for UV printing materials according to claim 3, characterized in that... Each clamping mechanism (4) includes a pair of clamping arms (41) for clamping materials and a first driving component (42) for driving the clamping arms (41) to move. The clamping mechanism (4) also includes a rotating shaft (43) that rotates with the crossbeam (22) and a connecting seat (44) fixed to one end of the rotating shaft (43). The first driving component (42) and the clamping arms (41) are mounted on the connecting seat (44). The other end of the rotating shaft (43) is formed with a gear part (45). The flipping mechanism (3) drives the gear part (45) to rotate, thereby driving the entire clamping mechanism (4) to flip.

5. A material flipping device for UV printing materials according to claim 4, characterized in that... The flipping mechanism (3) includes a rack (31) that slides with the crossbeam (22) and a second drive component (32) provided on the crossbeam (22) for driving the rack (31) to reciprocate along the length direction of the crossbeam (22). The rack (31) meshes with a corresponding gear (45).

6. A material flipping device for UV printing materials according to claim 5, characterized in that... A limiting groove (221) is formed on the crossbeam (22), and the rack (31) slides in conjunction with the limiting groove (221).

7. A material flipping device for UV printing materials according to claim 5, characterized in that... The second driving component (32) includes a motor (321) and a transmission gear (322). The transmission gear (322) is located on the output shaft of the motor (321) and meshes with the rack (31). The motor (321) drives the transmission gear (322) to rotate so as to drive the rack (31) to reciprocate along the length direction of the crossbeam (22), thereby driving the gear part (45) to rotate so as to realize the flipping of the clamping mechanism (4).

8. A material flipping device for UV printing materials according to claim 1, characterized in that... The positioning mechanism (5) includes a sensor (51) mounted on the clamping mechanism (4). The sensor (51) is used to collect material position signals and is electrically connected to the material flipping device (72). The sensor (51) can determine whether the material has arrived at the working area of ​​the clamping mechanism (4) and, after confirming that the material has arrived at the working area, activates the clamping action of the clamping mechanism (4).

9. A material flipping device for UV printing materials according to claim 2, characterized in that... The lifting assembly (23) includes guide rods (231) that slide with both ends of the crossbeam (22), and two lead screws (232) that are threaded with the left and right ends of the crossbeam (22). It also includes a third drive component (233) located on one side of the support frame (21) for driving the two lead screws (232) to rotate synchronously and thus driving the crossbeam (22) to move up and down. The upper end of the guide rod (231) is fixedly connected to the upper part of the support frame (21), and the lower end of the guide rod (231) is fixedly connected to the lower part of the frame (1). The upper end of the lead screw (232) is rotatably connected to the upper part of the support frame (21), and the lower end of the lead screw (232) is rotatably connected to the lower part of the frame (1).

10. A UV printing device, characterized in that... The invention includes a UV printing device (7) and a material flipping device (72) according to any one of claims 1 to 9. The UV printing device (7) includes a first conveyor belt (61) and a UV printing mechanism (71) disposed on the first conveyor belt (61). The material flipping device (72) is used to flip the material conveyed by the first conveyor belt (61) so that the material can be used again to cooperate with the UV printing mechanism (71) through the first conveyor belt (61) to complete the multi-sided printing of the material.

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