A high-efficiency durable optical disc thermal transfer printing system

Abstract

The application discloses a high-efficiency durable optical disc thermal transfer printing system, and belongs to the technical field of printer equipment. The system comprises a rack, a transmission mechanism, a one-section temperature control thermal transfer printing head, a single-shaft screw rod pressure adjusting mechanism and a pulse energy management system. The transmission mechanism is used for the transmission operation of the optical disc. The one-section temperature control thermal transfer printing head is installed in the rack and is used for completing the preheating, melting and solidification of the thermal transfer material in a single working cycle. The single-shaft screw rod pressure adjusting mechanism is used for driving the printing head to vertically lift and provide contact pressure. The pulse energy management system controls the surface temperature of the printing head through intermittent current input. The application has the effect of improving the optical disc printing quality and further improving the durability of the printed marks on the optical disc.

Description

Technical Field

[0001] This application relates to the field of printer equipment technology, and in particular to a high-efficiency and durable optical disc thermal transfer printing system. Background Technology

[0002] A thermal transfer printer consists of a frame, a thermal transfer printhead, and a transport system. The frame supports and protects the internal structure, while the thermal transfer printhead transfers the text and images to be printed onto materials such as paper and optical discs through heat. Printing on optical discs allows the basic information of the disc to be printed onto its surface for identification. With the increasing demand for data storage and the rising requirements for the printing quality of optical disc surfaces, the market urgently needs a new optical disc printing technology that combines high efficiency, high durability, and stability. Existing optical disc surface printing technologies typically employ the following solutions: First, improving the inkjet printing ink formulation by adding fast-drying components to increase drying speed, attempting to address the slow drying problem of inkjet printing during high-speed continuous printing. Second, using ultraviolet-cured inks, which can achieve rapid curing to meet the demands of high-speed printing.

[0003] These solutions address some of the issues with CD printing, but inkjet printing suffers from slow drying speeds and poor durability, making it unsuitable for high-speed continuous printing scenarios requiring durability. Ultraviolet curing equipment is expensive and has limited substrate adaptability, restricting its application in many more scenarios. Summary of the Invention

[0004] In order to improve the printing quality of optical discs and thus enhance the durability of printed markings on optical discs, this application provides an efficient and durable optical disc thermal transfer printing system.

[0005] The high-efficiency and durable optical disc thermal transfer printing system provided in this application adopts the following technical solution:

[0006] A high-efficiency and durable optical disc thermal transfer printing system includes a frame, within which are arranged a transmission mechanism, a single-stage temperature-controlled thermal transfer printhead, a single-axis lead screw pressure adjustment mechanism, and a pulsed energy management system. The transmission mechanism is used for the transmission and operation of the optical disc. The printhead is installed in the frame and is used to complete the preheating, melting, and curing of the thermal transfer material within a single working cycle. The single-axis lead screw pressure adjustment mechanism is used to drive the printhead to move vertically up and down and provide contact pressure. The pulsed energy management system controls the surface temperature of the printhead through intermittent current input.

[0007] By adopting the above technical solutions, the one-stage temperature-controlled thermal transfer printhead integrates preheating, melting, and curing stages within a single work cycle, avoiding the time loss of traditional multi-step operations and significantly shortening the processing time of a single optical disc, making it suitable for high-speed printing. The single-axis lead screw pressure adjustment mechanism achieves uniform contact pressure control between the printhead and the optical disc surface through vertical lifting drive, avoiding printing defects caused by uneven pressure, such as ink blurring and coating peeling, while also reducing mechanical wear and extending the life of the printhead. The pulsed energy management system controls the surface temperature of the printhead through intermittent current input. This energy management may help to precisely control the temperature, avoid overheating, improve energy efficiency, and potentially extend the life of the printhead. Therefore, this high-efficiency and durable optical disc thermal transfer printing system, through the integrated innovation of one-stage temperature control, single-axis lead screw pressure adjustment, and pulsed energy management, achieves multiple benefits including high-efficiency production, long-life operation, high-quality printing, and energy saving and environmental protection, making it particularly suitable for optical disc production scenarios with high requirements for printing speed, durability, and environmental friendliness.

[0008] Preferably, a bracket is fixedly connected inside the frame, and the single-axis lead screw pressure adjustment mechanism includes a lead screw, a connecting member, and a drive assembly for driving the lead screw to rotate. The connecting member is threaded to the lead screw, and a spring is sleeved on the lead screw. The two ends of the spring abut against the connecting member, and the print head is mounted on the connecting member.

[0009] By adopting the above technical solution, the threaded connection between the lead screw and the connector converts the power of the drive assembly into the linear lifting and lowering of the print head, ensuring the accuracy of the lifting process. The spring absorbs the impact force the print head makes upon contact with the optical disc, preventing damage to the print head or scratches on the disc surface caused by hard collisions, while also suppressing the transmission of mechanical vibration and improving printing stability. The spring compensates for mechanical backlash or manufacturing tolerances in the lead screw drive system through elastic deformation, reducing wobbling or positioning errors during the print head lifting and lowering process.

[0010] Preferably, the pulsed energy management system includes a high-frequency current generator and a heat dissipation substrate. The high-frequency current generator is connected to the print head, and the print head includes a thermal transfer sheet. The high-frequency current generator is electrically connected to the thermal transfer sheet. The high-frequency current generator outputs current at a preset frequency during the contact of the print head with the optical disc. The heat dissipation substrate is mounted on the print head and abuts against the back of the thermal transfer sheet. The heat dissipation substrate achieves rapid cooling of the print head through heat conduction.

[0011] By employing the above technical solution, during the contact between the printhead and the optical disc, the high-frequency current generator outputs intermittent current at a preset frequency, achieving rapid temperature rise and fall of the printhead surface. Intermittent high-frequency pulse heating reduces thermal fatigue caused by prolonged high-temperature operation of the printhead. This pulsed heating avoids the "thermal inertia" problem of traditional constant-current heating, ensuring precise temperature matching between the preheating, melting, and curing stages and the characteristics of the thermal transfer material, preventing overheating or underheating defects and improving color reproduction. The heat dissipation substrate uses a high thermal conductivity material, rapidly dissipating heat from the printhead to the external environment after printing, preventing heat accumulation inside the printhead, reducing cooling time, and improving continuous operation efficiency. The high-frequency current frequency and the thermal conductivity of the heat dissipation substrate can be adjusted for different thermal transfer material characteristics, ensuring precise matching of the melting and curing processes of various substrates and improving the system's adaptability to diverse printing needs.

[0012] Preferably, the drive assembly includes a motor, a worm gear, and a turbine. The motor is fixedly mounted on the frame, the worm gear is fixedly connected to the motor shaft, and the turbine is fixedly sleeved on the lead screw. The worm gear meshes with the turbine.

[0013] By adopting the above technical solution, the motor controls the rotation of the worm gear, the rotation of the worm gear drives the rotation of the turbine, and the rotation of the turbine drives the lead screw to rotate.

[0014] Preferably, the single-axis lead screw pressure adjustment mechanism further includes a pressure distribution correction unit. The pressure distribution correction unit monitors the uniformity of the contact pressure between the print head and the optical disc surface in real time through a multi-point pressure sensor. The pressure distribution correction unit is electrically connected to the motor, and the correction unit dynamically adjusts the lifting position of the lead screw according to the pressure sensor signal.

[0015] By adopting the above technical solution, multi-point pressure sensors continuously collect pressure data at various points, analyze the uniformity of pressure distribution through algorithms, and transmit the data to the motor. The motor controls the adjustment of the lead screw's lifting position to change the print head height or adjust the contact time to balance the pressure in each area, forming a closed-loop control of "monitoring-analysis-adjustment". This ensures that the print head and the optical disc surface always maintain uniform contact pressure, improving the consistency of print quality.

[0016] Preferably, the transmission mechanism includes a first transmission roller, a second transmission roller, and a third transmission roller, all of which rotate on the frame. A first pressing roller is disposed above the first transmission roller, and a second pressing roller is disposed above the third transmission roller. The second transmission roller is disposed below the print head. A drive device for driving the first, second, and third transmission rollers to rotate is disposed on the side wall of the frame. A disc feeding device is disposed at the front end of the first transmission roller.

[0017] By adopting the above technical solution, the operator inserts the optical disc into the printer from the inlet. The optical disc moves inward under the rotation of the first transfer roller. The combination of the first transfer roller and the first pressure roller effectively restricts the horizontal swaying and vertical tilting of the optical disc through a clamping-rolling dual action. Subsequently, the optical disc is transferred to the position of the second transfer roller, and the print head begins to transfer the image onto the surface of the optical disc. At this time, both ends of the optical disc abut against the first and second transfer rollers respectively, thereby preventing the optical disc from tilting when the print head presses against the surface of the optical disc for printing. As the transmission of the optical disc continues, just before the optical disc is about to detach from the first transfer roller, the other end of the optical disc enters between the third transfer roller and the second pressure roller, thereby preventing the possibility of the optical disc tilting during the entire printing process.

[0018] Preferably, a support plate is provided at the lower part of the print head inside the frame, one end of the support plate is located below the heat dissipation substrate, and a miniature cooling fan and a temperature sensor are installed on the support plate. The temperature sensor is used to detect temperature changes near the print head, and the cooling fan is directly opposite the high-frequency current generator.

[0019] By adopting the above technical solution, when the dynamic temperature near the printhead exceeds the threshold of the temperature sensor, the cooling fan is activated. The directional air cooling of the cooling fan can effectively prevent heat accumulation in the high-frequency current generator and printhead, avoiding the risk of unstable current output, component aging or failure caused by overheating, thereby ensuring the temperature stability of the printhead during continuous operation and ensuring consistent printing quality.

[0020] Preferably, the feeding device includes a first feeding plate and a second feeding plate, both of which are fixedly connected to the frame. The first feeding plate and the second feeding plate are arranged longitudinally with a spacing equal to the optical disc insertion port. A support plate is provided between the first and second transmission rollers. An mounting plate is installed above the support plate. A transmission belt is provided on the support plate. The running speed of the transmission belt is the same as the running speed of the transmission mechanism. An adjustment component is provided on the transmission belt for adjusting the optical disc movement trajectory according to the optical disc size.

[0021] By adopting the above technical solution, when the operator inserts a smaller-sized optical disc into the insertion port, the adjustment component adjusts the track of one end of the optical disc from the first transfer roller to the second transfer roller according to the size of the optical disc, and then transports it to the second transfer roller for printing under the action of the conveyor belt. This avoids the situation where the small-sized optical disc leaves the first transfer roller before reaching the second transfer roller, thereby improving the applicability of the optical disc printer.

[0022] Preferably, the adjustment assembly includes two detection blocks and two limiting plates. The inner walls of the first feed plate and the second feed plate are each provided with a first sliding groove. The two detection blocks are slidably connected in the first sliding groove. The detection blocks are provided with inclined surfaces. The optical disc abuts against the inclined surfaces and is inserted into the insertion port. A first sliding rod is provided in the first sliding groove. The two detection blocks are sleeved and slide on the first sliding rod.

[0023] The mounting plate has a second sliding groove, and a second sliding rod is disposed in the second sliding groove. A connecting block is fixedly connected to one end of the limiting plate. The connecting block is sleeved on and slides on the second sliding rod. The connecting block slides in the second sliding groove. A micro controller is installed in the detection block, and a micro receiver is installed in the connecting block. The micro controller can detect the displacement and position of the detection block. The micro receiver receives the data from the micro controller and controls the connecting block to slide on the second sliding rod and move synchronously with the detection block.

[0024] By adopting the above technical solution, when the optical disc is inserted, the sidewall of the optical disc pushes the two detection blocks to move on the slide bar by abutting the inclined surface on the detection block. Thus, when the optical disc is inserted, the distance between the two detection blocks is the moving diameter of the optical disc. When the detection blocks move, the connecting block moves synchronously, and the two limiting plates form a moving trajectory for the optical disc to be transmitted. Therefore, optical discs of different sizes can be used for printing.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] The single-stage temperature-controlled thermal transfer printhead integrates preheating, melting, and curing within a single work cycle, avoiding the time-consuming multi-step operations of traditional methods and significantly shortening the processing time for a single disc, making it suitable for high-speed printing. The single-axis lead screw pressure adjustment mechanism achieves uniform contact pressure control between the printhead and the disc surface through vertical lifting, avoiding printing defects caused by uneven pressure, such as blurred ink or coating peeling, while also reducing mechanical wear and extending printhead lifespan. The pulsed energy management system controls the printhead surface temperature through intermittent current input. This energy management can help precisely control temperature, prevent overheating, improve energy efficiency, and potentially extend printhead life. Therefore, this high-efficiency and durable optical disc thermal transfer printing system, through the integrated innovation of single-stage temperature control, single-axis lead screw pressure adjustment, and pulsed energy management, achieves multiple benefits including high-efficiency production, long-life operation, high-quality printing, and energy saving and environmental protection, making it particularly suitable for optical disc production scenarios with high requirements for printing speed, durability, and environmental friendliness.

[0027] The threaded connection between the lead screw and the connector converts the power of the drive assembly into linear lifting and lowering of the print head, ensuring the accuracy of the lifting process. The spring absorbs impact force the moment the print head contacts the optical disc, preventing damage to the print head or scratches on the disc surface caused by hard collisions, while also suppressing mechanical vibration transmission and improving printing stability. The spring compensates for mechanical backlash or manufacturing tolerances in the lead screw drive system through elastic deformation, reducing wobbling or positioning errors during print head lifting and lowering.

[0028] During the printhead's contact with the optical disc, a high-frequency current generator outputs intermittent current at a preset frequency, enabling rapid temperature rise and fall on the printhead surface. Intermittent high-frequency pulse heating reduces thermal fatigue caused by prolonged high-temperature operation of the printhead. This pulsed heating avoids the "thermal inertia" problem of traditional constant-current heating, ensuring precise temperature matching between the preheating, melting, and curing stages and the characteristics of the thermal transfer material, preventing overheating or underheating defects and improving color reproduction. The heat dissipation substrate uses a high thermal conductivity material, rapidly dissipating heat from the printhead to the external environment after printing, preventing heat accumulation inside the printhead, reducing cooling time, and improving continuous operation efficiency. The high-frequency current frequency and the thermal conductivity of the heat dissipation substrate can be adjusted for different thermal transfer material characteristics, ensuring precise matching of the melting and curing processes for various substrates and improving the system's adaptability to diverse printing needs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0030] Figure 2 This is a schematic diagram of the prominent transmission mechanism in Embodiment 1 of this application.

[0031] Figure 3 This is a schematic diagram of the protruding printhead in Embodiment 1 of this application.

[0032] Figure 4 This is a schematic diagram of the structure of the single-axis lead screw pressure adjustment mechanism in Embodiment 1 of this application.

[0033] Figure 5 This is a schematic diagram of the protruding feeding device in Embodiment 2 of this application.

[0034] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0035] Figure 7 This is a schematic diagram of the structure of the protruding limiting plate in Embodiment 2 of this application.

[0036] Figure 8 This is a schematic diagram of the structure of the prominent connecting block in Embodiment 2 of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Transfer mechanism; 3. Print head; 4. Single-axis lead screw pressure adjustment mechanism; 5. Support; 6. Lead screw; 7. Connector; 8. Drive assembly; 9. Spring; 10. High-frequency current generator; 11. Heat sink; 12. Transfer sheet; 13. Primary mounting block; 14. Secondary mounting block; 15. Tertiary mounting block; 16. Motor; 17. Worm gear; 18. Turbine; 19. First transfer roller; 20. Second transfer roller; 21. Third transfer roller; 22. 23. First pressing roller; 24. Second pressing roller; 25. Feeding device; 26. Drive device; 27. Support plate; 28. Miniature cooling fan; 29. ​​First feeding plate; 20. Second feeding plate; 31. Insertion port; 32. Support plate; 33. Conveyor belt; 34. Adjustment component; 35. Detection block; 36. Limiting plate; 37. First chute; 38. Inclined surface; 39. First sliding rod; 40. Second chute; 41. Second sliding rod; 42. Connecting block; 43. Abutment rod; 44. Mounting plate. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. Example 1

[0039] Embodiment 1 of this application discloses a high-efficiency and durable optical disc thermal transfer printing system, such as Figure 1 and Figure 2 As shown, the system includes a frame 1, within which are a transport mechanism 2 for transporting optical discs, a single-stage temperature-controlled thermal transfer printhead 3, a single-axis lead screw pressure adjustment mechanism 4, and a pulsed energy management system. The single-stage temperature-controlled thermal transfer printhead 3 is installed within the frame 1 and is used to preheat, melt, and cure the thermal transfer material within a single work cycle. The single-axis lead screw pressure adjustment mechanism 4 drives the printhead 3 to move vertically and provides contact pressure. The pulsed energy management system controls the surface temperature of the printhead 3 through intermittent current input.

[0040] like Figure 2As shown, the transmission mechanism 2 includes a first transmission roller 19, a second transmission roller 20, and a third transmission roller 21, which rotate horizontally on the frame 1 in sequence. A feeding device 24 for optical discs is installed inside the frame 1. The first transmission roller 19 is positioned close to the inner side of the feeding device 24, and a first pressure roller 22 is positioned above it. The second transmission roller 20 is located below the print head 3 and works in conjunction with the print head 3 to complete the printing operation. The third transmission roller 21 is located on the side of the second transmission roller 20 away from the first transmission roller 19, and a second pressure roller 23 is positioned above it. A drive device 25 is installed on the outer wall of the frame 1 to drive the first transmission roller 19, the second transmission roller 20, and the third transmission roller 21 to rotate. Under the action of the drive device 25, the rotation speeds of the first transmission roller 19, the second transmission roller 20, and the third transmission roller 21 are the same.

[0041] like Figure 1 and Figure 2 As shown, the operator inserts the disc to be printed into the feeding device 24. One end of the disc is inserted between the first transfer roller 19 and the first pressure roller 22, and moves inward under the rotation of the first transfer roller 19. The combination of the first transfer roller 19 and the first pressure roller 22 can clamp the disc while driving its movement. Under the dual action of clamping and rolling, the horizontal wobbling and vertical tilting of the disc can be effectively limited. Taking the size of a common disc as an example, the spacing between the first transfer roller 19, the second transfer roller 20, and the third transfer roller 21 is designed according to the most common market size. This allows the disc to simultaneously contact the first transfer roller 19 and the second transfer roller 20, or the second transfer roller 20 and the third transfer roller 21, during printing. Therefore, during printing, the pressure applied by the print head 3 to the disc surface can be avoided, preventing the disc from tilting and improving print quality.

[0042] like Figure 2 and Figure 3 As shown, a single-stage temperature-controlled thermal transfer printhead 3 is installed within the frame 1 and is used to complete the preheating, melting, and curing of the thermal transfer material within a single work cycle. This avoids the time loss associated with traditional multi-step operations, significantly shortening the processing time for a single optical disc and making it suitable for high-speed printing. A single-axis lead screw pressure adjustment mechanism 4 regulates the pressure of the optical disc on the printhead 3. During printing, a pressure of 0.5-1.2 MPa is used to completely melt and penetrate the carbon-based pigment to a depth of 0.1-0.3 μm on the polycarbonate surface of the optical disc. Curing is completed when the printhead 3 is lifted, thus completing the printing process. The pulsed energy management system includes a high-frequency current generator 10 and a heat dissipation substrate 11. The high-frequency current generator 10 is connected to the printhead 3.

[0043] like Figure 3As shown, the printhead 3 includes a primary mounting block 13, a secondary mounting block 14, a tertiary mounting block 15, and a thermal transfer sheet 12. The primary mounting block 13 is connected to the secondary mounting block 14, and the tertiary mounting block 15 is connected to the secondary mounting block 14. A high-frequency current generator 10 is mounted on the lower end face of the tertiary mounting block 15, and the thermal transfer sheet 12 is mounted on the lower end face of the high-frequency current generator 10. The high-frequency current generator 10 is electrically connected to the thermal transfer sheet 12. During the contact between the printhead 3 and the optical disc, the high-frequency current generator 10 outputs intermittent current at a preset frequency, enabling rapid temperature rise and fall of the printhead 3 surface, which helps to accurately control the temperature. Intermittent high-frequency pulse heating reduces thermal fatigue caused by prolonged high-temperature operation of the printhead 3. This pulse heating avoids the "thermal inertia" problem of traditional constant current heating, ensuring that the temperatures of the preheating, melting, and curing stages are precisely matched to the characteristics of the thermal transfer material, avoiding overheating or underheating defects, improving color reproduction, increasing energy efficiency, and potentially extending the life of the printhead 3.

[0044] like Figure 3 As shown, the heat dissipation substrate 11 is made of a high thermal conductivity material, such as aluminum alloy. The heat dissipation substrate 11 is mounted on the lower end face of the high-frequency current generator 10, and a portion of it abuts against the thermal transfer sheet 12. The heat dissipation substrate 11 achieves rapid cooling of the thermal transfer sheet 12 and the high-frequency current generator 10 through heat conduction. A support plate 26 is fixedly connected to the side wall of the third-level mounting block 15 away from the thermal transfer sheet 12. A miniature cooling fan 27 is installed on the side wall of the support plate 26. The miniature cooling fan 27 faces the side of the high-frequency current generator 10 and the side of the heat dissipation substrate 11. A temperature sensor is also installed on the support plate 26 to detect temperature changes near the printhead 3. When the temperature exceeds the set threshold, the miniature cooling fan 27 is activated. The directional air cooling of the miniature cooling fan 27 can accelerate the heat dissipation of the high-frequency current generator 10 and the thermal transfer sheet 12, which can effectively prevent heat accumulation at the high-frequency current generator 10 and the printhead 3, avoid the risk of unstable current output, component aging or failure caused by overheating, and thus ensure the temperature stability of the printhead 3 during continuous operation and ensure consistent printing quality.

[0045] The high-frequency current frequency and the thermal conductivity of the heat dissipation substrate 11 can be adjusted according to the characteristics of different thermal transfer materials to ensure precise matching of the melting and curing process of various substrates and improve the system's adaptability to diverse printing needs.

[0046] like Figure 4As shown, a bracket 5 is fixedly connected inside the frame 1. A single-axis lead screw pressure adjustment mechanism 4 is mounted on the bracket 5. The single-axis lead screw pressure adjustment mechanism 4 includes a lead screw 6, a connecting piece 7, and a drive assembly 8 for driving the lead screw 6 to rotate. The lead screw 6 is rotatably connected to the bracket 5. A primary mounting block 13 is fixedly connected to the connecting piece 7 by multiple screws. The connecting piece 7 is threadedly connected to the lead screw 6. The drive assembly 8 includes a motor 16, a worm gear 17, and a turbine 18. The motor 16 is fixedly mounted on the outer wall of the frame 1. The worm gear 17 is fixedly connected to the rotating shaft of the motor 16 and horizontally passes through the frame 1. The turbine 18 is fixedly sleeved on the top side wall of the lead screw 6. The worm gear 17 and the turbine 18 mesh. The motor 16 drives the lead screw 6 to rotate through the worm gear 17 and the turbine 18, thereby adjusting the lifting and lowering of the print head 3 and achieving uniform contact pressure control between the print head 3 and the optical disc surface. A spring 9 is fitted at the bottom of the lead screw 6, with both ends of the spring 9 abutting against the connector 7. The spring 9 absorbs the impact force when the print head 3 contacts the optical disc, preventing damage to the print head 3 or scratches on the optical disc surface caused by hard collisions. It also suppresses the transmission of mechanical vibration, improving printing stability. The spring 9 compensates for mechanical backlash or manufacturing tolerances in the lead screw 6 drive system through elastic deformation, reducing wobbling or positioning errors during the lifting and lowering of the print head 3.

[0047] like Figure 2 As shown, the single-axis lead screw pressure adjustment mechanism 4 also includes a pressure distribution correction unit. The pressure distribution correction unit monitors the uniformity of the contact pressure between the print head 3 and the optical disc surface in real time through multi-point pressure sensors. The pressure sensors are evenly distributed on the surface of the second transmission roller 20. They can sense the pressure of the optical disc on the second transmission roller 20 and reflect the pressure status of the contact surface between the print head 3 and the optical disc. The pressure distribution correction unit is electrically connected to the motor 16. The multi-point pressure sensors continuously collect pressure data at each point, analyze the pressure distribution uniformity through algorithms, and transmit the data to the motor 16. The motor 16 controls the adjustment of the lifting position of the lead screw 6 to change the height of the print head 3 or adjust the contact time to balance the pressure in each area, forming a closed-loop control of "monitoring-analysis-adjustment" to ensure that the print head 3 and the optical disc surface always maintain uniform contact pressure and improve the consistency of printing quality.

[0048] The principle of this embodiment is as follows: This high-efficiency and durable optical disc thermal transfer printing system achieves multiple benefits such as high-efficiency production, long-life operation, high-quality printing, and energy saving and environmental protection through the integrated innovation of one-stage temperature control, single-axis lead screw pressure adjustment and pulse energy management. It is especially suitable for optical disc production scenarios with high requirements for printing speed, durability and environmental protection, such as the mass production of archival optical discs, anti-counterfeiting optical discs and personalized custom optical discs. Example 2

[0049] The difference between this second embodiment and the first embodiment is that this second embodiment takes into account other sizes of optical discs, especially those smaller than the conventional size optical discs used in the first embodiment. During the printing process, the optical disc may detach from the first transfer roller 19 before entering the second transfer roller 20. In this case, the transfer of the optical disc between the first transfer roller 19 and the second transfer roller 20 needs to be considered.

[0050] like Figure 5 and Figure 6 As shown, the feeding device 24 includes a first feeding plate 28 and a second feeding plate 29. Both ends of the first feeding plate 28 and the second feeding plate 29 are fixedly connected to the inner side wall of the frame 1. The first feeding plate 28 is positioned above the second feeding plate 29, and the first feeding plate 28 and the second feeding plate 29 are spaced vertically by an insertion port 30 for inserting optical discs. A support plate 31 is fixedly disposed between the first transmission roller 19 and the second transmission roller 20. An mounting plate 43 is installed on the support plate 31 near the top of the first transmission roller 19, and the mounting plate 43 is fixedly connected to the end of the support plate 31 near the first transmission roller 19 by a connecting rod. A conveyor belt 32 is disposed on the support plate 31, and the running speed of the conveyor belt 32 is the same as the running speed of the transmission mechanism 2. An adjustment component 33 is disposed on the conveyor belt 32 for adjusting the optical disc movement trajectory according to the optical disc size.

[0051] like Figure 5 and Figure 6 As shown, the adjustment assembly 33 includes two detection blocks 34 and two limiting plates 35. The inner walls of the first feed plate 28 and the second feed plate 29 are each provided with a first sliding groove 36 extending along its length. The upper and lower ends of the two detection blocks 34 are slidably connected within the two first sliding grooves 36, respectively. A first sliding rod 38 is provided within the first sliding groove 36, and the detection blocks 34 are fitted and slidably onto the first sliding rod 38. Inclined surfaces 37 are provided on the opposite side walls of the two detection blocks 34, and the optical disc abuts against the inclined surfaces 37 and is inserted into the insertion port 30.

[0052] like Figure 7 and Figure 8 As shown, a second sliding groove 39 is provided on the mounting plate 43, and a second sliding rod 40 is provided in the second sliding groove 39. Connecting blocks 41 are fixedly welded to the upper end faces of the two limiting plates 35. The connecting blocks 41 are sleeved on the second sliding rod 40 and slide within the second sliding groove 39. Two detection blocks 34 and two connecting blocks 41 are arranged in a one-to-one correspondence. A micro controller is installed in the detection block 34, and a micro receiver is installed in the connecting block 41. An abutment rod 42 is provided on the side wall of the limiting plate 35 near the second transmission roller 20. The abutment rod 42 is arranged in an inverted L-shape and contacts the surface of the optical disc. When the optical disc enters the print head 3 for printing, the abutment rod 42 can prevent the optical disc from tilting.

[0053] The implementation principle of Embodiment 2 of this application is as follows: When the operator inserts a smaller-sized optical disc into the insertion port 30, the disc abuts against the inclined surface 37 on the detection block 34, pushing the two detection blocks 34 to move on the slide bar. The distance between the two detection blocks 34 is the dynamic diameter of the optical disc. When the detection block 34 moves, the micro controller inside transmits the position information of the detection block 34 to the micro receiver. The micro receiver controls the connecting block 41 to move synchronously with the detection block 34, thereby causing the limiting plate 35 to move synchronously. This creates a track between the two limiting plates 35 that is only for optical discs of this size to pass through. The optical disc enters the tray 31 and moves towards the second transmission roller 20 under the drive of the conveyor belt. The two limiting plates 35 prevent the optical disc from shifting during its movement.

[0054] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency and durable optical disc thermal transfer printing system, characterized in that: The device includes a frame (1), which contains a transmission mechanism (2), a single-stage temperature-controlled thermal transfer printhead (3), a single-axis lead screw pressure adjustment mechanism (4), and a pulse energy management system. The transmission mechanism (2) is used for the transmission and operation of optical discs. The printhead (3) is installed in the frame (1) and is used to complete the preheating, melting, and curing of the thermal transfer material in a single working cycle. The single-axis lead screw pressure adjustment mechanism (4) is used to drive the printhead (3) to move vertically up and down and provide contact pressure. The pulse energy management system controls the surface temperature of the printhead (3) through intermittent current input. The transmission mechanism (2) includes a first transmission roller (19), a second transmission roller (20), and a third transmission roller (21). The first transmission roller (19), the second transmission roller (20), and the third transmission roller (21) all rotate on the frame (1). A first pressing roller (22) is provided above the first transmission roller (19), and a second pressing roller (23) is provided above the third transmission roller (21). The second transmission roller (20) is located below the print head (3). A drive device (25) for driving the first transmission roller (19), the second transmission roller (20), and the third transmission roller (21) to rotate is provided on the side wall of the frame (1). A disc feeding device (24) is provided at the front end of the first transmission roller (19). The feeding device (24) includes a first feeding plate (28) and a second feeding plate (29). The first feeding plate (28) and the second feeding plate (29) are both fixedly connected to the frame (1). The first feeding plate (28) and the second feeding plate (29) are arranged longitudinally with a spacing equal to the optical disc insertion port (30). A tray (31) is provided between the first transmission roller (19) and the second transmission roller (20). An mounting plate (43) is installed above the tray (31). A transmission belt (32) is provided on the tray (31). The running speed of the transmission belt (32) is the same as the running speed of the transmission mechanism (2). An adjustment component (33) for adjusting the optical disc movement trajectory according to the optical disc size is provided on the transmission belt (32). The adjustment assembly (33) includes two detection blocks (34) and two limiting plates (35). The first feed plate (28) and the second feed plate (29) are provided with first grooves (36) on their inner walls. The two detection blocks (34) are slidably connected in the first grooves (36). The detection blocks (34) are provided with inclined surfaces (37). The optical disc abuts against the inclined surfaces (37) and is inserted into the insertion port (30). The first grooves (36) are provided with first sliding rods (38). The two detection blocks (34) are fitted and slide on the first sliding rods (38). The mounting plate (43) has a second sliding groove (39), and a second sliding rod (40) is provided in the second sliding groove (39). A connecting block (41) is fixedly connected to one end of the limiting plate (35). The connecting block (41) is sleeved on and slides on the second sliding rod (40). The connecting block (41) slides in the second sliding groove (39). A micro controller is installed in the detection block (34), and a micro receiver is installed in the connecting block (41). The micro controller can detect the displacement and position of the detection block (34). After receiving the data from the micro controller, the micro receiver controls the connecting block (41) to slide on the second sliding rod (40) and move synchronously with the detection block (34).

2. The high-efficiency and durable optical disc thermal transfer printing system according to claim 1, characterized in that: The frame (1) is fixedly connected to a bracket (5). The single-axis lead screw pressure adjustment mechanism (4) includes a lead screw (6), a connector (7), and a drive assembly (8) for driving the lead screw (6) to rotate. The connector (7) is threaded to the lead screw (6). A spring (9) is sleeved on the lead screw (6). The two ends of the spring (9) abut against the connector (7). The one-stage temperature-controlled heat transfer print head (3) is installed on the connector (7).

3. The high-efficiency and durable optical disc thermal transfer printing system according to claim 1, characterized in that: The pulsed energy management system includes a high-frequency current generator (10) and a heat dissipation substrate (11). The high-frequency current generator (10) is connected to the print head (3). The print head (3) includes a thermal transfer sheet (12). The high-frequency current generator (10) is electrically connected to the thermal transfer sheet (12). The high-frequency current generator (10) outputs current at a preset frequency during the contact of the print head (3) with the optical disc. The heat dissipation substrate (11) is mounted on the print head (3) and abuts against the back of the thermal transfer sheet (12). The heat dissipation substrate (11) achieves rapid cooling of the print head (3) through heat conduction.

4. The high-efficiency and durable optical disc thermal transfer printing system according to claim 2, characterized in that: The drive assembly (8) includes a motor (16), a worm gear (17), and a turbine (18). The motor (16) is fixedly mounted on the frame (1). The worm gear (17) is fixedly connected to the rotating shaft of the motor (16). The turbine (18) is fixedly sleeved on the lead screw (6). The worm gear (17) meshes with the turbine (18).

5. The high-efficiency and durable optical disc thermal transfer printing system according to claim 4, characterized in that: The single-axis lead screw pressure adjustment mechanism (4) also includes a pressure distribution correction unit. The pressure distribution correction unit monitors the uniformity of the contact pressure between the print head (3) and the optical disc surface in real time through a multi-point pressure sensor. The pressure distribution correction unit is electrically connected to the motor (16). The correction unit dynamically adjusts the lifting position of the lead screw (6) according to the pressure sensor signal.

6. The high-efficiency and durable optical disc thermal transfer printing system according to claim 3, characterized in that: A support plate (26) is provided inside the frame (1) at the lower position of the print head (3). One end of the support plate (26) is located below the heat dissipation substrate (11). A miniature heat dissipation fan (27) and a temperature sensor are installed on the support plate (26). The temperature sensor is used to detect temperature changes near the print head (3). The heat dissipation fan is directly opposite the high-frequency current generator (10).

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