Card turnover device for double-sided DOD jet printing

Abstract

The utility model discloses a card turnover device for double-sided DOD jet printing. The card turnover device comprises a movable frame, a plurality of groups of clamping turnover mechanisms and a movable driving mechanism, the arrangement distance between every two adjacent sets of clamping and overturning mechanisms is the same as the arrangement distance between the multiple positioning grooves formed in the movable platform. Each group of clamping and overturning mechanism comprises a clamping mechanism and an overturning mechanism for driving the clamping mechanism to overturn; after the clamping mechanism clamps the card and turns over by 180 degrees, the position of the card is overlapped with the position of the adjacent card before turning over. According to the card turnover device, one-time turnover of a plurality of cards can be achieved, the arrangement distance of the turned cards is not changed and is consistent with the arrangement distance of the cards on the movable platform, and therefore rapid turnover and handover of the cards can be well achieved, turnover and handover of the cards can be conducted synchronously, operation efficiency is improved, and labor intensity of workers is reduced. And meanwhile, the structure is more compact, and the overturned cards are positioned more accurately.

Description

Technical Field

[0001] This utility model relates to the field of card processing, specifically a card flipping device for double-sided DOD inkjet printing. Background Technology

[0002] UV inkjet printing is commonly known as DOD (Dual Ink) printing. It boasts advantages such as safety, environmental friendliness, vibrant colors, and strong adhesion. With continuous technological advancements, DOD printing is becoming increasingly prevalent in the printing industry. Currently, it is basically divided into two types: scanning printing, where the ink is gradually layered through multiple reciprocating printhead movements, and single-pass printing, where the printhead is stationary and the material moves. Single-pass printing is more than ten times more efficient than multiple-pass printing. However, because the clarity of single-pass printing was previously significantly lower than that of multiple-pass printing, it was rarely used for high-precision and high-definition printing, especially for images. Now, the quality of single-pass printing has greatly improved. Besides monochrome printing, multi-printhead color mixing for color printing has also been successfully achieved. With the continuous expansion of market usage, the cost of DOD printing, including inkjet printers, is decreasing significantly. Its development direction is to improve printing quality and efficiency while saving space and labor costs. To achieve high-quality printing, two conditions are required: firstly, the material movement needs to be uniform, stable, and precise; secondly, the ink flow and timing control of multiple printheads must be precise. The latter is a technology that the inkjet printer itself needs to continuously improve.

[0003] Traditional material conveying methods use conveyor belts, such as the invention patent disclosed in application publication number CN118386690A, "A High-Precision Double-Sided DOD Printing Device, Method, and Production Line for Sheet Materials." The high-precision double-sided DOD printing device for sheet materials uses a first handling module to transport sheet materials from an upstream sheet material conveyor to a first positioning seat on a first moving platform. Before the sheet material is transported to the first positioning seat, an OCR module is used to acquire an image of the sheet material and prepare registration data recording the positional distribution of the image to be printed within the sheet material. Simultaneously, the position of the sheet material at the first positioning seat is precisely located. Based on the prepared registration data, the position of the first positioning seat in the Y-axis direction is precisely adjusted to align the positional relationship between the sheet material and the image to be printed in the Y-axis direction. A first servo drive mechanism moves the first positioning seat to the first surface printing module for printing the first side of the sheet material. During the printing process, the first positioning... The printing base moves along the X-axis, and high-precision printing start positioning in the X-axis direction is achieved by controlling the trigger time of the printing start. After the printing process of the first side of the sheet material is completed, the first servo drive mechanism drives the first positioning base to move to the flipping module. The flipping module flips the sheet material with the first side completed and transfers it to the second positioning base of the second moving platform. The module also precisely positions the sheet material in the second positioning base and the second positioning base in the Y-axis direction. The second servo drive mechanism drives the second positioning base to move to the second surface printing module for the printing process of the second side of the sheet material. During the printing process, the second positioning base moves along the X-axis, and high-precision printing start positioning in the X-axis direction is achieved by controlling the trigger time of the printing start. After the printing process of the second side of the sheet material is completed, the second servo drive mechanism drives the second positioning base to move to the second conveying module. The second conveying module conveys the sheet material with the double-sided printing process to the downstream sheet material conveying device for subsequent processes.

[0004] However, in the above process, a card flipping device is needed to flip the cards. However, when the existing card flipping device flips the cards, the spacing between the flipped cards is easily changed, which makes it impossible to keep in line with the spacing between the cards on the mobile platform. As a result, it cannot achieve fast card flipping and handover. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a card flipping device for double-sided DOD inkjet printing. The card flipping device can flip multiple cards at once, and the spacing between the flipped cards remains unchanged and consistent with the spacing between the cards on the moving platform. This enables rapid card flipping and handover, allowing the flipping and handover to proceed synchronously, thereby improving work efficiency. It also makes the structure more compact and the positioning of the flipped cards more accurate.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is:

[0007] A card flipping device for double-sided DOD inkjet printing includes a movable frame, multiple sets of clamping and flipping mechanisms disposed on the movable frame, and a moving drive mechanism for driving the movable frame to move along a direction perpendicular to the card conveying direction. The multiple sets of clamping and flipping mechanisms are arranged sequentially along the card conveying direction. The spacing between adjacent sets of clamping and flipping mechanisms is the same as the spacing between multiple positioning slots disposed on the movable platform. Each set of clamping and flipping mechanisms includes a clamping mechanism and a flipping mechanism for driving the clamping mechanism to flip. After the clamping mechanism clamps and flips the card 180°, the position of the card overlaps with the position of the adjacent card before the flip.

[0008] Preferably, before flipping, the clamping mechanism is located near the side of the second surface printing module; after flipping, the clamping mechanism is located near the side of the first surface printing module.

[0009] Preferably, the clamping mechanism includes a clamping seat, an upper clamping block and a lower clamping block disposed on the clamping seat, and a clamping drive mechanism for driving the upper clamping block and the lower clamping block to move in opposite directions or in reverse, wherein the upper clamping block is located above the card conveying channel, and the lower clamping block is located below the card conveying channel.

[0010] Preferably, the flipping mechanism includes a swing arm and a rotary motor for driving the swing arm to flip 180 degrees, wherein the clamping seat is mounted on the swing arm, and the swing arm is rotatably connected to the movable frame via a rotating shaft; the rotary motor is mounted on the movable frame, and the main shaft of the rotary motor is connected to all the swing arms on the movable frame via a power transmission mechanism.

[0011] Preferably, the power transmission mechanism includes a driving gear and a driven gear, wherein the driving gear is mounted on the main shaft of the rotary motor; the driven gear is in multiple sets, and each set of driven gears is coaxially arranged with the swing arm in each set of clamping and flipping mechanisms; a transmission gear is arranged between the driven gears in two adjacent sets of clamping and flipping mechanisms, and the transmission gear is rotatably connected to the movable frame, and the transmission gear meshes with two adjacent sets of driven gears respectively; the driving gear meshes with one or two sets of driven gears.

[0012] Preferably, the moving drive mechanism includes a drive cylinder mounted on the frame, and the piston rod of the drive cylinder is connected to the moving frame.

[0013] Preferably, a sliding guide mechanism is provided between the bottom of the movable frame and the frame.

[0014] Preferably, the mobile platform is further provided with a first positioning mechanism for positioning the card located in the positioning slot in a direction parallel to its conveying direction and a second positioning mechanism for positioning the card in a direction perpendicular to its conveying direction. The first positioning mechanism includes a first positioning cylinder, which is mounted on the mobile platform and the piston rod of the first positioning cylinder is connected to the first moving positioning member. The mobile platform is provided with a clearance groove at a position corresponding to the first moving positioning member.

[0015] Preferably, the second positioning mechanism includes a second fixed positioning member, a second movable positioning member disposed opposite to the second fixed positioning member, and a second positioning drive mechanism for driving the second movable positioning member to move along a direction perpendicular to the card conveying direction, wherein the second fixed positioning member is fixed to the moving platform; the second positioning drive mechanism is disposed on both sides of each clamping mechanism, including a positioning block and a positioning cylinder for driving the positioning block to move perpendicular to the card conveying direction, wherein the positioning cylinder is mounted on the clamping seat, and the piston rod of the positioning cylinder is connected to the positioning block.

[0016] Preferably, the positioning block has limit posts at both ends; the clamping seat has a limit block between the two sets of limit posts.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The card flipping device of this utility model can flip multiple cards at once, and the spacing between the flipped cards remains unchanged and is consistent with the spacing between the cards on the moving platform. This enables the rapid flipping and handover of cards, allowing the flipping and handover to be carried out synchronously, thereby improving work efficiency. It also makes the structure more compact and the positioning of the flipped cards more accurate. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the card flipping device and moving platform for double-sided DOD inkjet printing according to this utility model.

[0020] Figures 2-5 These are schematic diagrams of the card flipping device for double-sided DOD printing from four different perspectives.

[0021] Figure 6 This is a schematic diagram of the clamping mechanism. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0023] See Figures 1-6 This utility model discloses a card flipping device for double-sided DOD inkjet printing, comprising a frame 1, a movable frame 711 mounted on the frame 1, multiple sets of clamping and flipping mechanisms mounted on the movable frame 711, and a moving drive mechanism for driving the movable frame 711 to move along a direction perpendicular to the card conveying direction. The multiple sets of clamping and flipping mechanisms are arranged sequentially along the card conveying direction, with the spacing between adjacent sets of clamping and flipping mechanisms being the same as the spacing between multiple positioning slots on the moving platform 2. Each set of clamping and flipping mechanisms includes a clamping mechanism and a flipping mechanism for driving the clamping mechanism to flip. After the clamping mechanism clamps and flips the card 180°, the position of the card overlaps with the position of the adjacent card before the flip. Through this arrangement, multiple cards can be flipped at once, and the spacing between the cards after flipping remains unchanged and consistent with the spacing between the cards on the moving platform 2. This effectively achieves rapid card flipping and handover, allowing card flipping and handover to occur synchronously, thereby improving work efficiency. It also makes the structure more compact and the card positioning more accurate after flipping. (See also...) Figures 1-6 The mobile platform 2 consists of two sets, namely a first mobile platform and a second mobile platform. Each set of mobile platforms 2 is provided with multiple positioning slots arranged along the card conveying direction. The mobile platform 2 is provided with a first positioning mechanism 5 for positioning the card in a direction parallel to the card conveying direction and a second positioning mechanism for positioning the card in a direction perpendicular to its conveying direction.

[0024] See Figures 1-6The first positioning mechanism 5 includes a first fixed positioning member, a first movable positioning member disposed opposite to the first fixed positioning member, and a first positioning drive mechanism for driving the first movable positioning member to move in the opposite direction to the card conveying direction. The first fixed positioning member is fixed on the mobile platform 2. The first positioning mechanism 5 includes a first positioning cylinder, which is mounted on the mobile platform 2, and the piston rod of the first positioning cylinder is connected to the first movable positioning member. The mobile platform 2 is provided with a clearance groove on the first movable positioning member.

[0025] When it is necessary to position the card in the X-axis direction (i.e., parallel to the card's transport direction), the first positioning cylinder drives the first moving positioning component to move in the direction of the first fixed positioning component, thereby achieving positioning of the card in the X-axis direction. To ensure the movement accuracy of the first moving positioning component, a sliding mechanism is provided between the first moving positioning component and the moving platform 2, such as a slide rail and a slider provided on the slide rail. The first moving positioning component is mounted on the slider.

[0026] See Figures 1-6 The second positioning mechanism includes a second fixed positioning member 6, a second movable positioning member disposed opposite to the second fixed positioning member 6, and a second positioning drive mechanism for driving the second movable positioning member to move along a direction perpendicular to the card conveying direction, wherein,

[0027] The second fixing and positioning component 6 is fixed on the mobile platform 2;

[0028] The second positioning drive mechanism is disposed on both sides of each clamping mechanism, including a positioning block 709 and a second positioning cylinder for driving the positioning block 709 to move perpendicular to the card conveying direction. The positioning block 709 constitutes the second movable positioning component. The second positioning cylinder is mounted on the clamping seat 701, and the piston rod of the second positioning cylinder is connected to the positioning block 709. Limiting posts 712 are provided at both ends of the positioning block 709. The clamping seat 701 is provided with a limiting block between the two sets of limiting posts 712. The movement stroke of the positioning block 709 can be limited by the limiting posts 712 on both sides.

[0029] After the card is flipped 180 degrees and transferred to the second moving platform, it needs to be repositioned on the second moving platform. The first positioning mechanism 5, which is set on the moving platform 2, positions the card in the X-axis direction (this process has been described in detail above and will not be repeated). When it is necessary to position the card in the Y-axis direction (i.e., perpendicular to the card's conveying direction), the second positioning cylinder drives the positioning block 709 to move along the direction perpendicular to the card's conveying direction, thereby pushing the card toward the second fixed positioning member 6. When the card contacts the second fixed positioning member 6, the positioning of the card in the Y-axis direction is completed. Then, the negative pressure device is activated, thereby adsorbing the positioned card onto the second moving platform.

[0030] During the flipping process, the first moving platform first transports multiple cards to the flipping station. The clamping mechanisms in multiple sets of clamping and flipping mechanisms simultaneously clamp the multiple cards in the first moving platform and flip them. During the flipping process, the first moving platform leaves the flipping station, while the second moving platform moves to the flipping station. Subsequently, the clamping mechanisms in multiple sets of clamping and flipping mechanisms flip the multiple cards 180° and drop them into the second moving platform. By utilizing the time for flipping the cards in the clamping and flipping mechanisms, the first moving platform can quickly leave and the second moving platform can quickly reach the card receiving position, making the card flipping and handover time as compact as possible, minimizing the card flipping and handover time, and improving production efficiency.

[0031] See Figures 1-6 Before flipping, the clamping mechanism is located on the side closer to the second surface printing module, and after flipping, it is located on the side closer to the first surface printing module. This helps to shorten the length of the card flipping station and make the length of the straight track as short as possible, thereby helping to reduce the size of the equipment.

[0032] See Figures 1-6 The clamping mechanism includes a clamping base 701, an upper clamping block 702 and a lower clamping block 703 disposed on the clamping base 701, and a clamping drive mechanism (e.g., a finger cylinder) for driving the upper clamping block 702 and the lower clamping block 703 to move in opposite directions or in reverse. The upper clamping block 702 is located above the card conveying channel, and the lower clamping block 703 is located below the card conveying channel.

[0033] See Figures 1-6The flipping mechanism includes a rotary motor 706 for driving the clamping seat 701 to flip 180 degrees. The clamping seat 701 is mounted on a swing arm 704, which is rotatably connected to the movable frame 711 via a rotating shaft. The rotary motor 706 is mounted on the movable frame 711, and its main shaft is connected to all the clamping seats 701 on the movable frame 711 via a power transmission mechanism. The power transmission mechanism includes a driving gear and a driven gear 705. The driving gear is mounted on the main shaft of the rotary motor 706; there are multiple sets of driven gears 705, each set of driven gears 705 is coaxially arranged with the swing arm 704 in each set of clamping and flipping mechanisms; a transmission gear 713 is arranged between the driven gears 705 in two adjacent sets of clamping and flipping mechanisms, the transmission gear 713 is rotatably connected to the moving frame 711, and the transmission gear 713 meshes with two adjacent sets of driven gears 705 respectively; the driving gear meshes with one or two sets of driven gears 705.

[0034] See Figures 1-6 The moving drive mechanism includes a drive cylinder 710 mounted on the frame 1, and the piston rod of the drive cylinder 710 is connected to the moving frame 711. A sliding guide mechanism 708 is provided between the bottom of the moving frame 711 and the frame 1. The drive cylinder 710 drives the moving frame 711 to move along a direction perpendicular to the card conveying direction. At the same time, a limit stop 707 is provided at the end position to limit the moving frame 711.

[0035] With the above configuration, after the first moving platform drives the card to complete the printing of the first side, the first moving platform transports the card to the card flipping device of the present invention. The moving drive mechanism drives the moving frame 711 to move along the conveying direction perpendicular to the card, so that the upper clamping block 702 and the lower clamping block 703 are respectively located on the upper and lower sides of the card. Subsequently, the clamping drive mechanism is activated, so that the upper clamping block 702 and the lower clamping block 703 clamp the card. Then, the rotary motor 706 drives the clamping seat 701 to rotate 180 degrees through the power transmission mechanism. During the flipping process, the first moving platform leaves the flipping station, and at the same time, the second moving platform moves to the flipping station. Subsequently, the clamping mechanism in the multiple sets of clamping and flipping mechanisms flips multiple cards 180° and drops them into the positioning slot of the second moving platform. At the same time, the first moving platform resets, that is, returns to the end of the upstream card conveying device.

[0036] The above are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A card flipping device for double-sided DOD inkjet printing, characterized in that, The device includes a movable frame, multiple sets of clamping and flipping mechanisms mounted on the movable frame, and a moving drive mechanism for driving the movable frame to move along a direction perpendicular to the card conveying direction. The multiple sets of clamping and flipping mechanisms are arranged sequentially along the card conveying direction. The spacing between adjacent sets of clamping and flipping mechanisms is the same as the spacing between multiple positioning slots on the movable platform. Each set of clamping and flipping mechanisms includes a clamping mechanism and a flipping mechanism for driving the clamping mechanism to flip. After the clamping mechanism clamps and flips the card by 180°, the position of the card overlaps with the position of the adjacent card before the flip.

2. The card flipping device for double-sided DOD printing according to claim 1, characterized in that, Before flipping, the clamping mechanism is located near the side of the second surface printing module; after flipping, the clamping mechanism is located near the side of the first surface printing module.

3. The card flipping device for double-sided DOD inkjet printing according to claim 1, characterized in that, The clamping mechanism includes a clamping seat, an upper clamping block and a lower clamping block disposed on the clamping seat, and a clamping drive mechanism for driving the upper clamping block and the lower clamping block to move in opposite directions or in reverse. The upper clamping block is located above the card conveying channel, and the lower clamping block is located below the card conveying channel.

4. The card flipping device for double-sided DOD printing according to claim 3, characterized in that, The flipping mechanism includes a swing arm and a rotary motor for driving the swing arm to flip 180 degrees. The clamping seat is mounted on the swing arm, and the swing arm is rotatably connected to the movable frame via a rotating shaft. The rotary motor is mounted on the movable frame, and the main shaft of the rotary motor is connected to all the swing arms on the movable frame via a power transmission mechanism.

5. The card flipping device for double-sided DOD printing according to claim 4, characterized in that, The power transmission mechanism includes a driving gear and a driven gear. The driving gear is mounted on the main shaft of the rotary motor. There are multiple sets of driven gears, and each set of driven gears is coaxially arranged with the swing arm in each set of clamping and flipping mechanisms. A transmission gear is arranged between the driven gears in two adjacent sets of clamping and flipping mechanisms. The transmission gear is rotatably connected to the moving frame and meshes with two adjacent sets of driven gears respectively. The driving gear meshes with one or two sets of driven gears.

6. The card flipping device for double-sided DOD printing according to claim 5, characterized in that, The moving drive mechanism includes a drive cylinder mounted on the frame, and the piston rod of the drive cylinder is connected to the moving frame.

7. The card flipping device for double-sided DOD printing according to claim 6, characterized in that, A sliding guide mechanism is provided between the bottom of the mobile frame and the machine frame.

8. The card flipping device for double-sided DOD printing according to claim 7, characterized in that, The mobile platform is also provided with a first positioning mechanism for positioning the card located in the positioning slot in a direction parallel to its conveying direction and a second positioning mechanism for positioning the card in a direction perpendicular to its conveying direction. The first positioning mechanism includes a first positioning cylinder, which is mounted on the mobile platform and the piston rod of the first positioning cylinder is connected to the first moving positioning component. The mobile platform is provided with a clearance groove at a position corresponding to the first moving positioning component.

9. The card flipping device for double-sided DOD printing according to claim 8, characterized in that, The second positioning mechanism includes a second fixed positioning member, a second movable positioning member disposed opposite to the second fixed positioning member, and a second positioning drive mechanism for driving the second movable positioning member to move along a direction perpendicular to the card conveying direction. The second fixed positioning member is fixed to the moving platform. The second positioning drive mechanism is disposed on both sides of each clamping mechanism and includes a positioning block and a positioning cylinder for driving the positioning block to move perpendicular to the card conveying direction. The positioning cylinder is mounted on the clamping seat, and the piston rod of the positioning cylinder is connected to the positioning block.

10. The card flipping device for double-sided DOD inkjet printing according to claim 9, characterized in that, The positioning block has limit posts at both ends; the clamping seat has a limit block between the two sets of limit posts.

Images