A full-face high-precision stamping device and method for smart cards

Abstract

The application discloses a full-surface high-precision stamping device and method for an intelligent card, and the method comprises the following steps: before formal stamping, a rotating disc continuously rotates with a plurality of empty negative pressure supporting tables, a vertical trimming driving mechanism is used to adjust a trimming cutter to a preset vertical trimming amount, a horizontal driving mechanism is used to drive the trimming cutter to be close to the surface of each negative pressure supporting table in rotation, all the surfaces of the negative pressure supporting tables are simultaneously cut at the same height to realize equal-height trimming, then the card is respectively adsorbed and fixed on each negative pressure supporting table after trimming, the rotating disc is step-by-step rotated, and the card is sequentially sent to a stamping station, a stamping head is lowered to stamp the full surface of the card, and the stamping head is raised to reset after the stamping is completed. Through the online one-time equal-height trimming of all the negative pressure supporting tables before formal stamping, the height error of each supporting table is fundamentally reduced, the pressure is uniform and consistent during full-surface stamping, and the stamping quality and product consistency are greatly improved.

Description

Technical Field

[0001] This invention relates to smart card manufacturing technology, specifically to a high-precision hot stamping device and method for the entire surface of a smart card. Background Technology

[0002] In the production of smart cards, relevant information, such as text and images, is typically printed onto the card surface using hot stamping. Hot stamping is achieved through a hot stamping device, which mainly includes a ribbon conveyor mechanism, a card conveyor mechanism, and a hot stamping mechanism. The hot stamping mechanism primarily consists of a hot stamping head. The ribbon conveyor mechanism supplies the ribbon (also known as the hot stamping tape) to the hot stamping head, and the card conveyor mechanism transports the card to be printed to the area below the hot stamping head. During operation, the card is positioned below the hot stamping head, and the ribbon is located between the card and the hot stamping head. The hot stamping head melts the ink on the ribbon and transfers it to the card surface through targeted heating, forming the information to be printed.

[0003] In existing smart card hot stamping equipment, the card conveying mechanism often adopts a rotary conveyor system. Multiple negative pressure support platforms are spaced circumferentially on the rotary table, each platform holding a card to be processed. During processing, the rotary table rotates stepwise, conveying the cards sequentially to the hot stamping station. The hot stamping module drives the stamping head downwards to approach the card for hot stamping. This rotary conveyor structure offers advantages such as fast station changeover and high production efficiency, and is therefore widely used in automated smart card production lines.

[0004] However, in actual production, the above-mentioned turntable conveying method has significant precision defects: Because each negative pressure support platform is independently installed on the turntable, the bearing surface of each platform is difficult to guarantee absolute consistency in height due to factors such as part machining errors, cumulative assembly errors, and uneven wear of the working surface after long-term use. When the card to be processed is adsorbed onto different negative pressure support platforms, the actual height of the card's upper surface relative to the reference plane of the hot stamping head fluctuates, resulting in significant processing deviations for the same batch of products at different workstations. For partial hot stamping, the impact of this height fluctuation is relatively limited because the hot stamping head only contacts the card in a small area, which can be compensated for to a certain extent by the elastic floating mechanism. However, for full-page hot stamping, the hot stamping head needs to maintain uniform contact with the card surface over a large area. If there is a height deviation on the card's upper surface, when the hot stamping head descends to a fixed stroke, it will cause excessive pressure in some areas, insufficient pressure in others, or even failure to make contact in some areas, thus severely damaging the integrity and color uniformity of the hot stamping pattern. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems and provide a high-precision hot stamping device and method for the entire surface of a smart card. This hot stamping device and method fundamentally and significantly reduces the height error of each support platform by performing online one-time equalization adjustment of all negative pressure support platforms on the conveyor turntable before formal hot stamping, ensuring that the pressure between the card surface and the hot stamping head is uniform and consistent during full-surface hot stamping, thereby greatly improving the integrity of the hot stamping pattern and the consistency of the finished product.

[0006] The objective of this invention is achieved through the following technical solution: A high-precision hot stamping device for the entire surface of a smart card includes a ribbon conveying mechanism for conveying ribbon, a turntable conveying mechanism for conveying the card to be printed to the hot stamping station, and a hot stamping processing mechanism for transferring the color or pattern of the ribbon onto the card by heating the ribbon. The turntable conveying mechanism includes a conveying turntable, a negative pressure support platform, and a rotary drive mechanism for driving the conveying turntable to rotate. Multiple negative pressure support platforms are provided and are circumferentially distributed on the conveying turntable around the axis of the conveying turntable. The multiple negative pressure support platforms are respectively connected to a negative pressure source through a negative pressure channel. The hot stamping processing mechanism includes a hot stamping head and a vertical hot stamping drive mechanism for driving the hot stamping head to move vertically. It also includes a uniform finishing mechanism for uniformly finishing the surface of the negative pressure support platform. The uniform finishing mechanism includes a finishing blade, a horizontal drive mechanism for driving the finishing blade to move horizontally, and a vertical finishing drive mechanism for driving the finishing blade to move vertically. The finishing process of the uniform finishing mechanism is arranged before the formal hot stamping process: the rotary drive mechanism drives the conveyor turntable to rotate, and the turntable carries multiple unloaded negative pressure support platforms to rotate continuously. The vertical finishing drive mechanism adjusts the vertical finishing amount of the finishing blade. The horizontal drive mechanism drives the finishing blade to approach the surface of the multiple rotating unloaded negative pressure support platforms and cuts the surface of the multiple negative pressure support platforms at the same height at the same time, so as to achieve equal height finishing of the multiple negative pressure support platforms.

[0007] In a preferred embodiment of the present invention, the horizontal drive mechanism includes a horizontal handwheel and a horizontal transmission assembly. The horizontal transmission assembly includes a horizontal transmission plate, a horizontal transmission screw, and a horizontal transmission screw nut. The horizontal handwheel is fixedly connected to one end of the horizontal transmission screw. The horizontal transmission screw is rotatably connected to the horizontal transmission plate and engages with the horizontal transmission screw nut. The horizontal transmission screw nut is fixedly mounted on the equipment frame. The vertical trimming drive mechanism is mounted on the horizontal transmission plate. With the above structure, the horizontal feed of the trimming tool is achieved through a purely mechanical manual adjustment method using a horizontal handwheel in conjunction with the horizontal transmission screw and screw nut. The structure is simple and compact, requiring no additional independent power drive source and control unit, thus reducing equipment manufacturing costs and control complexity.

[0008] Furthermore, the vertical trimming drive mechanism includes a vertical mounting base and a vertical handwheel and a vertical trimming transmission assembly mounted on the vertical mounting base. The vertical mounting base is fixedly mounted on a horizontal transmission plate. The vertical trimming transmission assembly includes a vertical trimming transmission plate, a vertical trimming transmission screw, and a vertical trimming transmission screw nut. The vertical handwheel is fixedly connected to one end of the vertical trimming transmission screw. The vertical trimming transmission screw is rotatably connected to the vertical trimming transmission plate and engages with the vertical trimming transmission screw nut. The trimming cutter is mounted on the vertical trimming transmission plate via a shank. With this structure, the vertical feed of the trimming cutter is controlled manually using the vertical handwheel in conjunction with the vertical trimming transmission screw and screw nut. The operation is intuitive and convenient, allowing the operator to precisely adjust the depth of cut of the trimming cutter according to actual trimming needs.

[0009] Furthermore, a horizontal guide assembly is provided between the horizontal transmission plate and the equipment frame, and a vertical guide assembly is provided between the vertical trimming transmission plate and the vertical mounting base. Through this structure, the horizontal guide assembly further constrains the movement direction of the horizontal transmission plate, ensuring the trimming cutter feeds along a precise straight trajectory, effectively reducing sway and vibration during movement, and improving the flatness of the trimming cutter on the surface of the negative pressure support platform. The vertical guide assembly ensures precise vertical movement of the trimming cutter, preventing it from tilting or shifting due to force during cutting, resulting in a smooth, even, and uniformly high surface on each negative pressure support platform after trimming, thus improving the trimming quality.

[0010] In a preferred embodiment of the present invention, the vertical hot stamping drive mechanism includes a vertical mounting frame and a vertical hot stamping drive motor and an alligator transmission assembly disposed on the vertical mounting frame; The vertical hot stamping drive motor is mounted on the vertical mounting frame via a vertical plate; The alligator-type transmission assembly includes a synchronous transmission assembly and a reciprocating swing assembly. The reciprocating swing assembly includes an eccentric shaft, a central swing arm, a central rotating shaft, and a reciprocating swing frame. The synchronous transmission assembly is connected between the vertical hot stamping drive motor and the eccentric shaft. Both ends of the eccentric shaft are rotatably connected to the vertical plate. The upper end of the central swing arm is rotatably connected to the eccentric part of the eccentric shaft, and the lower end of the central swing arm is fixedly connected to the central rotating shaft. The central rotating shaft is rotatably connected to the top of the reciprocating swing frame. The bottom of the reciprocating swing frame is rotatably connected to the inner plate. The hot stamping head is mounted on the reciprocating swing frame. The rotation center of the bottom of the reciprocating swing frame, the hot stamping plane of the hot stamping head at its lowest position, and the surface of the card at the hot stamping station are all on the same straight line. Through this structure, the hot stamping head is driven by the alligator-type transmission assembly to perform reciprocating swing hot stamping, instead of the traditional straight-up-down drive method (which makes it difficult for the ribbon to expel air and easily leads to small air bubbles). During operation, driven by the vertical hot stamping drive motor, the synchronous transmission assembly and eccentric shaft transmit power to the intermediate swing arm, causing the intermediate swing arm to reciprocate vertically. This, in turn, pulls the reciprocating swing frame around its bottom rotation center via the intermediate rotating shaft. The hot stamping head moves in an arc with the swing frame. When the hot stamping head reaches its lowest position, its stamping surface contacts the card surface, completing the hot stamping process. Because the rotation center at the bottom of the reciprocating swing frame, the stamping surface of the hot stamping head at its lowest position, and the card surface at the hot stamping station are all on the same straight line, the hot stamping head gradually presses against the card surface (this can be adjusted flexibly in practice; for example, maintaining a gradually pressing contact that is infinitely close to zero before the final bonding). This progressive pressing method helps to gradually expel air between the hot stamping head and the card from the center of the hot stamping area towards the edge, effectively reducing residual air bubbles during the hot stamping process, thereby improving the adhesion quality and surface smoothness of the hot stamped pattern.

[0011] Furthermore, the inner plate is located on the inner side of the lower end of the reciprocating swing frame. The top of the inner plate is fixedly connected to the vertical mounting frame, and the bottom of the inner plate is rotatably connected to the bottom of the reciprocating swing frame. A buffer spring is provided between the inner plate and the inner wall of the reciprocating swing frame, with its two ends abutting against the inner plate and the inner wall of the reciprocating swing frame, respectively. Through this structure, when the reciprocating swing frame performs reciprocating hot stamping, the buffer spring is compressed or released during the swinging process, providing elastic cushioning for the swinging motion. This effectively absorbs the vibration and impact generated during the movement of the reciprocating swing frame, making the contact process between the hot stamping head and the card surface smoother and gentler. It avoids sudden increases or decreases in hot stamping pressure caused by rigid contact, further improving the uniformity of hot stamping pressure and the consistency of hot stamping quality. Simultaneously, the buffer spring can also compensate for minor deviations caused by part processing errors and assembly errors, enabling adaptive contact between the hot stamping head and the card surface. This is particularly suitable for applications requiring high uniformity of pressure over a large area during full-page hot stamping.

[0012] A method for high-precision hot stamping of the entire surface of a smart card includes the following steps: Before the formal hot stamping process, the multiple negative pressure support platforms on the conveyor turntable are kept unloaded. The rotary drive mechanism is started to drive the conveyor turntable to rotate continuously. The vertical trimming drive mechanism is used to adjust the trimming blade to the preset vertical trimming amount. Then, the horizontal drive mechanism is used to drive the trimming blade to approach the surface of the multiple unloaded negative pressure support platforms that are rotating, so that the trimming blade cuts the surface of multiple negative pressure support platforms at the same height at the same time until the bearing surface of all negative pressure support platforms is trimmed to be coplanar and on the same horizontal plane, thus completing the equal height trimming. Place the cards to be hot stamped on the trimmed negative pressure support platforms, turn on the negative pressure source, and use the negative pressure channel to generate an adsorption force on each negative pressure support platform to adsorb and fix the cards onto the corresponding negative pressure support platforms. The conveyor turntable is driven to rotate step by step by a rotary drive mechanism, which transports the negative pressure support table with the card adsorbed to the hot stamping station. When the negative pressure support table carries the card to the hot stamping station, the vertical hot stamping drive mechanism drives the hot stamping head downward, so that the working surface of the hot stamping head maintains the color ribbon between the working surface of the hot stamping head and the card surface, and applies uniform pressure. The hot stamping head heats up at a fixed point, melts the pigment on the color ribbon and transfers it to the card surface, completing the hot stamping of the entire card. After hot stamping is completed, the vertical hot stamping drive mechanism drives the hot stamping head to move upward and reset. The negative pressure source stops providing suction force to the negative pressure support table, and the hot stamped card is removed from the negative pressure support table. The conveyor turntable continues to rotate step by step, repeating steps four and five until all cards are hot stamped.

[0013] In a preferred embodiment of the present invention, during the continuous rotation of the conveyor turntable, the trimming blade maintains a constant vertical height, and the horizontal drive mechanism drives the trimming blade to feed in the horizontal direction. The trimming blade passes through the upper surface of each negative pressure support platform in sequence, and continuously cuts all the negative pressure support platforms at the same height.

[0014] In a preferred embodiment of the present invention, the conveyor turntable rotates one station at a time, delivering a negative pressure support platform and the card it adsorbs to the hot stamping station, and then pauses its rotation. After the card is hot stamped, the conveyor turntable rotates again to deliver the next negative pressure support platform and the card it adsorbs to the hot stamping station.

[0015] In a preferred embodiment of the present invention, the vertical hot stamping drive mechanism drives the hot stamping head downward, specifically employing an alligator-type transmission method to drive the hot stamping head to perform reciprocating oscillating hot stamping, the steps of which include: Start the vertical hot stamping drive motor, and transmit power to the eccentric shaft through the synchronous transmission component. The eccentric part of the eccentric shaft drives the middle swing arm to reciprocate vertically. The middle swing arm pulls the top of the reciprocating swing frame through the middle rotating shaft fixedly connected to its lower end, so that the reciprocating swing frame swings back and forth around the rotation connection point between its bottom and the inner plate. The hot stamping head set on the reciprocating swing frame moves in an arc with the swing frame. The hot stamping head is in a state of gradually pressing against the card surface, and the air between the hot stamping head and the card is gradually discharged when it approaches the ribbon. When the reciprocating swing frame swings to its lowest position, the hot stamping plane of the hot stamping head contacts the card surface. At this time, the rotation center at the bottom of the reciprocating swing frame, the hot stamping plane of the hot stamping head, and the card surface at the hot stamping station are all on the same straight line, and the hot stamping officially begins. After hot stamping is completed, the vertical hot stamping drive motor continues to run, driving the reciprocating swing frame to swing back and reset via the middle swing arm, and the hot stamping head then moves upward and detaches from the card surface.

[0016] Compared with the prior art, the present invention has the following advantages: 1. Before hot stamping, this invention uses a unified precision finishing mechanism to perform equal-height finishing on all negative pressure support platforms on the conveyor turntable. This simultaneously cuts the bearing surfaces of multiple negative pressure support platforms at the same height, fundamentally and significantly reducing the problem of inconsistent heights caused by part machining errors, cumulative assembly errors, and uneven wear after use. This technical approach is fundamentally different from existing technologies: conventional technologies, when facing the problem of fluctuating negative pressure support platform heights, typically address it by improving part machining accuracy, optimizing assembly processes, or adding online detection and compensation devices. These approaches are all based on "passive adaptation" or "local compensation," rarely involving proactive finishing processes at the hot stamping equipment terminal to physically unify the reference surface. This invention breaks this technological inertia by performing a one-time online finishing of all negative pressure support platforms before formal hot stamping, ensuring that all bearing surfaces achieve a consistent height. This provides a precise and stable card positioning reference for subsequent full-page hot stamping, ensuring that each card has a consistent starting height at the hot stamping station. This significantly improves the pattern integrity, color uniformity, and finished product qualification rate of full-page hot stamping. 2. This invention adopts a method of uniformly repairing the assembled negative pressure support platform at the terminal site. This not only compensates for the machining error of parts and the cumulative assembly error, but also eliminates the height difference caused by the different wear levels of the working surfaces of each negative pressure support platform after long-term use. This allows the equipment to maintain high-precision card positioning capability during long-term operation, extends the equipment accuracy maintenance cycle, and reduces the frequency and cost of maintenance and calibration.

[0017] 3. This invention utilizes the rotational motion of the conveyor turntable in conjunction with the horizontal feed of the trimming cutter to complete the cutting and trimming of all negative pressure support surfaces in one continuous operation during the turntable's continuous rotation. This eliminates the need to disassemble each negative pressure support surface individually for machining, and also eliminates the need for dedicated grinding equipment. This saves labor costs and equipment investment, and avoids secondary positioning errors caused by repeated disassembly and reassembly. The trimming process can be completed directly at the existing station of the hot stamping equipment, and production can begin immediately after trimming, achieving an integrated "trimming-hot stamping" process and effectively improving the overall efficiency of the production line. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the high-precision hot stamping device for the entire surface of a smart card according to the present invention.

[0019] Figure 2 This is a side view of the smart card full-page high-precision hot stamping device of the present invention.

[0020] Figure 3 This is a three-dimensional schematic diagram of the hot stamping processing mechanism of the present invention.

[0021] Figure 4This is a side view of the hot stamping processing mechanism of the present invention, which hides one side wall of the reciprocating swing frame. Detailed Implementation

[0022] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto. Example

[0023] Combination Figure 1-4 The smart card full-page high-precision hot stamping device of this embodiment includes a ribbon conveying mechanism for conveying ribbon, a turntable conveying mechanism (not shown in the figure, but can be referred to in the prior art) for conveying the card to be printed to the hot stamping station, and a hot stamping processing mechanism for transferring the color or pattern of the ribbon onto the card by heating the ribbon; the turntable conveying mechanism includes a conveying turntable 1, a negative pressure support platform 2, and a rotary drive mechanism for driving the conveying turntable 1 to rotate. The negative pressure support platforms 2 are provided in multiples and are circumferentially distributed on the conveying turntable 1 around the axis of the conveying turntable 1. The multiple negative pressure support platforms 2 are respectively connected to a negative pressure source through a negative pressure channel; the specific structure can be referred to in the prior art.

[0024] Combination Figure 1-4 It also includes a uniform finishing mechanism for uniformly finishing the surface of the negative pressure support platform 2. The uniform finishing mechanism includes a finishing blade 3, a horizontal drive mechanism for driving the finishing blade 3 to move horizontally, and a vertical finishing drive mechanism for driving the finishing blade 3 to move vertically. The finishing process of the uniform finishing mechanism is arranged before the formal hot stamping process: the rotary drive mechanism drives the conveyor turntable 1 to rotate, and the turntable carries multiple unloaded negative pressure support platforms 2 to rotate continuously. The vertical finishing drive mechanism adjusts the vertical finishing amount of the finishing blade 3. The horizontal drive mechanism drives the finishing blade 3 to approach the surface of the multiple unloaded negative pressure support platforms 2 that are rotating, and cuts the surface of multiple negative pressure support platforms 2 at the same height at the same time to achieve equal height finishing of multiple negative pressure support platforms 2.

[0025] Combination Figure 1-4The horizontal drive mechanism includes a horizontal handwheel 4 and a horizontal transmission assembly. The horizontal transmission assembly includes a horizontal transmission plate 5, a horizontal transmission screw, and a horizontal transmission screw nut. The horizontal handwheel 4 is fixedly connected to one end of the horizontal transmission screw. The horizontal transmission screw is rotatably connected to the horizontal transmission plate 5 and engages with the horizontal transmission screw nut. The horizontal transmission screw nut is fixedly mounted on the equipment frame. The vertical trimming drive mechanism is mounted on the horizontal transmission plate 5. With this structure, the horizontal feed of the trimming cutter 3 is achieved through a purely mechanical manual adjustment method using the horizontal handwheel 4 in conjunction with the horizontal transmission screw and screw nut. The structure is simple and compact, requiring no additional independent power drive source and control unit, thus reducing equipment manufacturing costs and control complexity.

[0026] Combination Figure 1-4 The vertical trimming drive mechanism includes a vertical mounting base 6, a vertical handwheel 7 mounted on the vertical mounting base 6, and a vertical trimming transmission assembly. The vertical mounting base 6 is fixedly mounted on a horizontal transmission plate 5. The vertical trimming transmission assembly includes a vertical trimming transmission plate 8, a vertical trimming transmission screw, and a vertical trimming transmission screw nut. The vertical handwheel 7 is fixedly connected to one end of the vertical trimming transmission screw. The vertical trimming transmission screw is rotatably connected to the vertical trimming transmission plate 8 and engages with the vertical trimming transmission screw nut. The trimming cutter 3 is mounted on the vertical trimming transmission plate 8 via a cutter handle 9. With this structure, the vertical feed of the trimming cutter 3 is controlled manually using the vertical handwheel 7 in conjunction with the vertical trimming transmission screw and screw nut. The operation is intuitive and convenient, and the operator can precisely adjust the depth of cut of the trimming cutter 3 according to actual trimming needs.

[0027] Combination Figure 1-4 A horizontal guide assembly is provided between the horizontal transmission plate 5 and the equipment frame, and a vertical guide assembly is provided between the vertical trimming transmission plate 8 and the vertical mounting base 6. Through this structure, the horizontal guide assembly further constrains the movement direction of the horizontal transmission plate 5, ensuring that the trimming cutter 3 feeds along a precise straight trajectory, significantly reducing sway and vibration during movement, and improving the flatness of the trimming cutter 3 on the surface of the negative pressure support platform 2. The vertical guide assembly ensures that the trimming cutter 3 moves precisely in the vertical direction, preventing it from tilting or deviating due to force during cutting, resulting in a smooth and uniformly high upper surface of each negative pressure support platform 2 after trimming, thus improving the trimming quality.

[0028] Combination Figure 1-4The hot stamping processing mechanism includes a hot stamping head 10 and a vertical hot stamping drive mechanism for driving the hot stamping head 10 to move vertically; wherein, the vertical hot stamping drive mechanism includes a vertical mounting frame 11 and a vertical hot stamping drive motor 12 and an alligator transmission assembly disposed on the vertical mounting frame 11; the vertical hot stamping drive motor 12 is mounted on the vertical mounting frame 11 via a vertical plate 13.

[0029] Combination Figure 1-4 The alligator-type transmission assembly includes a synchronous transmission assembly and a reciprocating swing assembly. The reciprocating swing assembly includes an eccentric shaft 14, a middle swing arm 15, a middle rotating shaft 16, and a reciprocating swing frame 17. The synchronous transmission assembly is connected between the vertical hot stamping drive motor 12 and the eccentric shaft 14. Both ends of the eccentric shaft 14 are rotatably connected to the vertical plate 13. The upper end of the middle swing arm 15 is rotatably connected to the eccentric part of the eccentric shaft 14, and the lower end of the middle swing arm 15 is fixedly connected to the middle rotating shaft 16. The middle rotating shaft 16 is rotatably connected to the top of the reciprocating swing frame 17. The bottom of the reciprocating swing frame 17 is rotatably connected to the inner plate 18. The hot stamping head 10 is disposed on the reciprocating swing frame 17. The rotation center of the bottom of the reciprocating swing frame 17, the hot stamping plane of the hot stamping head 10 moved to the lowest position, and the surface of the card located at the hot stamping station are on the same straight line (e.g., Figure 4 (Thick dashed line in the image). Through the above structure, the hot stamping head 10 is driven by an alligator-type transmission assembly to perform reciprocating oscillating hot stamping, instead of the traditional straight up and down driving method (which makes it difficult for the ribbon to vent air and easily leads to small air bubbles). During operation, driven by the vertical hot stamping drive motor 12, the synchronous transmission assembly and the eccentric shaft 14 transmit power to the intermediate swing arm 15, causing the intermediate swing arm 15 to move reciprocally vertically. Then, through the intermediate rotating shaft 16, it pulls the reciprocating swing frame 17 to swing back and forth around its bottom rotation center. The hot stamping head 10 moves in an arc with the swing frame. When the hot stamping head 10 moves to the lowest position, its hot stamping plane contacts the card surface and completes the hot stamping. Since the rotation center at the bottom of the reciprocating swing frame 17, the hot stamping plane of the hot stamping head 10 when it moves to the lowest position, and the card surface at the hot stamping station are all on the same straight line, the hot stamping head 10 is in a state of gradual pressing relative to the card surface (this can be flexibly adjusted in actual situations, for example, maintaining a gradual pressing contact that is infinitely close to 0 before the final bonding). This gradual pressing method helps to gradually expel the air between the hot stamping head 10 and the card from the center of the hot stamping area to the edge, effectively reducing the residual air bubbles during the hot stamping process, thereby improving the adhesion quality and surface smoothness of the hot stamping pattern.

[0030] Combination Figure 1-4The inner plate 18 is located on the lower inner side of the reciprocating swing frame 17. The top of the inner plate 18 is fixedly connected to the vertical mounting frame 11, and the bottom of the inner plate 18 is rotatably connected to the bottom of the reciprocating swing frame 17. A buffer spring 19 is provided between the inner plate 18 and the inner wall of the reciprocating swing frame 17, with both ends of the buffer spring 19 abutting against the inner plate 18 and the inner wall of the reciprocating swing frame 17, respectively. With the above structure, when the reciprocating swing frame 17 performs reciprocating swing hot stamping, the buffer spring 19 is compressed or released during the swing process, providing elastic buffering for the swing motion. This effectively absorbs the vibration and impact generated by the reciprocating swing frame 17 during the movement, making the contact process between the hot stamping head 10 and the card surface more stable and gentle. It avoids the sudden increase or decrease in hot stamping pressure caused by rigid contact, further improving the uniformity of hot stamping pressure and the consistency of hot stamping quality. Meanwhile, the buffer spring 19 can also compensate for minor deviations caused by part processing errors and assembly errors, enabling the hot stamping head 10 to achieve adaptive bonding with the card surface, which is especially suitable for the high requirements of large-area pressure uniformity when hot stamping the entire surface. Example

[0031] Combination Figure 1-4 The high-precision hot stamping method for the entire surface of a smart card in this embodiment includes the following steps: Before the formal hot stamping process, the multiple negative pressure support platforms 2 on the conveyor turntable 1 are kept unloaded. The rotary drive mechanism is started to drive the conveyor turntable 1 to rotate continuously. The vertical trimming drive mechanism is used to adjust the trimming blade 3 to the preset vertical trimming amount. Then, the horizontal drive mechanism is used to drive the trimming blade 3 to approach the surface of the multiple unloaded negative pressure support platforms 2 that are rotating, so that the trimming blade 3 cuts the surface of multiple negative pressure support platforms 2 at the same height at the same time until the bearing surface of all negative pressure support platforms 2 is trimmed to be coplanar and on the same horizontal plane, thus completing the equal height trimming.

[0032] Place the cards to be hot-stamped on the trimmed negative pressure support platforms 2, turn on the negative pressure source, and generate an adsorption force through the negative pressure channel to adsorb and fix the cards onto the corresponding negative pressure support platforms 2.

[0033] The rotary drive mechanism drives the conveyor turntable 1 to rotate step by step, conveying the negative pressure support table 2 with the card adsorbed to the hot stamping station.

[0034] When the negative pressure support platform 2 carries the card to the hot stamping station, the vertical hot stamping drive mechanism drives the hot stamping head 10 downward, so that the working surface of the hot stamping head 10 maintains the color ribbon between itself and the card surface, and applies uniform pressure. The hot stamping head 10 heats up at a fixed point, melts the pigment on the color ribbon and transfers it to the card surface, completing the hot stamping of the entire card.

[0035] After hot stamping is completed, the vertical hot stamping drive mechanism drives the hot stamping head 10 to move upward and reset. The negative pressure source stops providing adsorption force to the negative pressure support table 2, and the hot stamped card is removed from the negative pressure support table 2. The conveyor turntable 1 continues to rotate step by step, repeating steps four and five until all cards are hot stamped.

[0036] Combination Figure 1-4 During the continuous rotation of the conveyor turntable 1, the trimming blade 3 maintains a constant vertical height, and the horizontal drive mechanism drives the trimming blade 3 to feed in the horizontal direction. The trimming blade 3 passes through the upper surface of each negative pressure support platform 2 in sequence, and continuously cuts all the negative pressure support platforms 2 at the same height.

[0037] Combination Figure 1-4 The conveyor turntable 1 rotates one station at a time, sending a negative pressure support platform 2 and the card it adsorbs to the hot stamping station. After the card is hot stamped, the conveyor turntable 1 rotates again to send the next negative pressure support platform 2 and the card it adsorbs to the hot stamping station.

[0038] Combination Figure 1-4 The vertical hot stamping drive mechanism drives the hot stamping head 10 downwards, specifically using an alligator drive to drive the hot stamping head 10 to perform reciprocating hot stamping. The steps include: Start the vertical hot stamping drive motor 12, and transmit power to the eccentric shaft 14 through the synchronous transmission component. The eccentric part of the eccentric shaft 14 drives the intermediate swing arm 15 to reciprocate vertically.

[0039] The intermediate swing arm 15 pulls the top of the reciprocating swing frame 17 through the intermediate rotating shaft 16 fixedly connected to its lower end, so that the reciprocating swing frame 17 swings back and forth around the rotation connection point between its bottom and the inner plate 18. The hot stamping head 10 set on the reciprocating swing frame 17 moves in an arc with the swing frame. The hot stamping head 10 is in a state of gradually pressing against the card surface. When it approaches the ribbon, the air between the hot stamping head 10 and the card is gradually discharged.

[0040] When the reciprocating swing frame 17 swings to its lowest position, the hot stamping plane of the hot stamping head 10 contacts the card surface. At this time, the rotation center at the bottom of the reciprocating swing frame 17, the hot stamping plane of the hot stamping head 10, and the card surface located at the hot stamping station are all on the same straight line, and the hot stamping officially begins.

[0041] After hot stamping is completed, the vertical hot stamping drive motor 12 continues to run, driving the reciprocating swing frame 17 to swing back and reset via the middle swing arm 15, and the hot stamping head 10 moves upward and detaches from the card surface.

[0042] The above are preferred embodiments of the present invention, but the embodiments of the present invention 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 invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A high-precision hot stamping device for the entire surface of a smart card, characterized in that, It includes a ribbon conveying mechanism for conveying ribbons, a turntable conveying mechanism for conveying cards to be printed to the hot stamping station, and a hot stamping processing mechanism for transferring the color or pattern of the ribbon onto the card by heating the ribbon. The turntable conveying mechanism includes a conveying turntable, a negative pressure support platform, and a rotary drive mechanism for driving the conveying turntable to rotate. Multiple negative pressure support platforms are provided and are circumferentially distributed on the conveying turntable around the axis of the conveying turntable. The multiple negative pressure support platforms are respectively connected to a negative pressure source through a negative pressure channel. The hot stamping processing mechanism includes a hot stamping head and a vertical hot stamping drive mechanism for driving the hot stamping head to move vertically. It also includes a uniform finishing mechanism for uniformly finishing the surface of the negative pressure support platform. The uniform finishing mechanism includes a finishing blade, a horizontal drive mechanism for driving the finishing blade to move horizontally, and a vertical finishing drive mechanism for driving the finishing blade to move vertically. The finishing process of the uniform finishing mechanism is arranged before the formal hot stamping process: the rotary drive mechanism drives the conveyor turntable to rotate, and the turntable carries multiple unloaded negative pressure support platforms to rotate continuously. The vertical finishing drive mechanism adjusts the vertical finishing amount of the finishing blade. The horizontal drive mechanism drives the finishing blade to approach the surface of the multiple unloaded negative pressure support platforms that are rotating, and cuts the surface of multiple negative pressure support platforms at the same height at the same time, so as to achieve equal height finishing of multiple negative pressure support platforms.

2. The high-precision hot stamping device for the entire surface of a smart card according to claim 1, characterized in that, The horizontal drive mechanism includes a horizontal handwheel and a horizontal transmission assembly. The horizontal transmission assembly includes a horizontal transmission plate, a horizontal transmission screw, and a horizontal transmission screw nut. The horizontal handwheel is fixedly connected to one end of the horizontal transmission screw. The horizontal transmission screw is rotatably connected to the horizontal transmission plate and cooperates with the horizontal transmission screw nut. The horizontal transmission screw nut is fixedly mounted on the equipment frame. The vertical trimming drive mechanism is mounted on the horizontal transmission plate.

3. The high-precision hot stamping device for the entire surface of a smart card according to claim 2, characterized in that, The vertical trimming drive mechanism includes a vertical mounting base and a vertical handwheel and a vertical trimming transmission assembly mounted on the vertical mounting base. The vertical mounting base is fixedly mounted on a horizontal transmission plate. The vertical trimming transmission assembly includes a vertical trimming transmission plate, a vertical trimming transmission screw, and a vertical trimming transmission screw nut. The vertical handwheel is fixedly connected to one end of the vertical trimming transmission screw. The vertical trimming transmission screw is rotatably connected to the vertical trimming transmission plate and engages with the vertical trimming transmission screw nut. The trimming blade is mounted on the vertical trimming transmission plate via a blade holder.

4. The high-precision hot stamping device for the entire surface of a smart card according to claim 3, characterized in that, A horizontal guide assembly is provided between the horizontal transmission plate and the equipment frame, and a vertical guide assembly is provided between the vertical trimming transmission plate and the vertical mounting base.

5. The high-precision hot stamping device for the entire surface of a smart card according to claim 1, characterized in that, The vertical hot stamping drive mechanism includes a vertical mounting frame and a vertical hot stamping drive motor and an alligator transmission assembly mounted on the vertical mounting frame. The vertical hot stamping drive motor is mounted on the vertical mounting frame via a vertical plate; The alligator-type transmission assembly includes a synchronous transmission assembly and a reciprocating swing assembly. The reciprocating swing assembly includes an eccentric shaft, a central swing arm, a central rotating shaft, and a reciprocating swing frame. The synchronous transmission assembly is connected between the vertical hot stamping drive motor and the eccentric shaft. Both ends of the eccentric shaft are rotatably connected to the vertical plate. The upper end of the central swing arm is rotatably connected to the eccentric part of the eccentric shaft, and the lower end of the central swing arm is fixedly connected to the central rotating shaft. The central rotating shaft is rotatably connected to the top of the reciprocating swing frame. The bottom of the reciprocating swing frame is rotatably connected to the inner plate. The hot stamping head is mounted on the reciprocating swing frame. The rotation center of the bottom of the reciprocating swing frame, the hot stamping plane of the hot stamping head at the lowest position, and the surface of the card located at the hot stamping station are on the same straight line.

6. The high-precision hot stamping device for the entire surface of a smart card according to claim 5, characterized in that, The inner plate is located on the inner side of the lower end of the reciprocating swing frame. The top of the inner plate is fixedly connected to the vertical mounting frame, and the bottom of the inner plate is rotatably connected to the bottom of the reciprocating swing frame. A buffer spring is provided between the inner plate and the inner wall of the reciprocating swing frame, with the two ends of the buffer spring abutting against the inner plate and the inner wall of the reciprocating swing frame, respectively.

7. A method for high-precision hot stamping of the entire surface of a smart card using the high-precision hot stamping apparatus for the entire surface of a smart card as described in any one of claims 1-6, characterized in that, Includes the following steps: Before the formal hot stamping process, the multiple negative pressure support platforms on the conveyor turntable are kept unloaded. The rotary drive mechanism is started to drive the conveyor turntable to rotate continuously. The vertical trimming drive mechanism is used to adjust the trimming blade to the preset vertical trimming amount. Then, the horizontal drive mechanism is used to drive the trimming blade to approach the surface of the multiple unloaded negative pressure support platforms that are rotating, so that the trimming blade cuts the surface of multiple negative pressure support platforms at the same height at the same time until the bearing surface of all negative pressure support platforms is trimmed to be coplanar and on the same horizontal plane, thus completing the equal height trimming. Place the cards to be hot stamped on the trimmed negative pressure support platforms, turn on the negative pressure source, and use the negative pressure channel to generate an adsorption force on each negative pressure support platform to adsorb and fix the cards onto the corresponding negative pressure support platforms. The conveyor turntable is driven to rotate step by step by a rotary drive mechanism, which transports the negative pressure support table with the card adsorbed to the hot stamping station. When the negative pressure support table carries the card to the hot stamping station, the vertical hot stamping drive mechanism drives the hot stamping head downward, so that the working surface of the hot stamping head maintains the color ribbon between the working surface of the hot stamping head and the card surface, and applies uniform pressure. The hot stamping head heats up at a fixed point, melts the pigment on the color ribbon and transfers it to the card surface, completing the hot stamping of the entire card. After hot stamping is completed, the vertical hot stamping drive mechanism drives the hot stamping head to move upward and reset. The negative pressure source stops providing suction force to the negative pressure support table, and the hot stamped card is removed from the negative pressure support table. The conveyor turntable continues to rotate step by step, repeating steps four and five until all cards are hot stamped.

8. The method for high-precision hot stamping of the entire surface of a smart card according to claim 7, characterized in that, During the continuous rotation of the conveyor turntable, the trimming blade maintains a constant vertical height, and the horizontal drive mechanism drives the trimming blade to feed in the horizontal direction. The trimming blade passes through the upper surface of each negative pressure support platform in sequence, and continuously cuts all the negative pressure support platforms at the same height.

9. The method for high-precision hot stamping of the entire surface of a smart card according to claim 7, characterized in that, The conveyor turntable rotates one station at a time, delivering a negative pressure support platform and the card it holds to the hot stamping station. It then pauses its rotation until the card is hot stamped. After the card is hot stamped, the conveyor turntable rotates again, delivering the next negative pressure support platform and the card it holds to the hot stamping station.

10. The method for high-precision hot stamping of the entire surface of a smart card according to claim 7, characterized in that, The vertical hot stamping drive mechanism drives the hot stamping head downwards, specifically using an alligator drive to drive the hot stamping head to perform reciprocating oscillating hot stamping. The steps include: Start the vertical hot stamping drive motor, and transmit power to the eccentric shaft through the synchronous transmission component. The eccentric part of the eccentric shaft drives the middle swing arm to reciprocate vertically. The middle swing arm pulls the top of the reciprocating swing frame through the middle rotating shaft fixedly connected to its lower end, so that the reciprocating swing frame swings back and forth around the rotation connection point between its bottom and the inner plate. The hot stamping head set on the reciprocating swing frame moves in an arc with the swing frame. The hot stamping head is in a state of gradually pressing against the card surface, and the air between the hot stamping head and the card is gradually discharged when it approaches the ribbon. When the reciprocating swing frame swings to its lowest position, the hot stamping plane of the hot stamping head contacts the card surface. At this time, the rotation center at the bottom of the reciprocating swing frame, the hot stamping plane of the hot stamping head, and the card surface at the hot stamping station are all on the same straight line, and the hot stamping officially begins. After hot stamping is completed, the vertical hot stamping drive motor continues to run, driving the reciprocating swing frame to swing back and reset via the middle swing arm, and the hot stamping head then moves upward and detaches from the card surface.

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