A varnish transfer 3D crystal emboss printing process and printing equipment

Abstract

The present application relates to the technical field of printing equipment, in particular to a varnish transfer 3D crystal embossing printing process, which comprises the assembly of a printing mold, then the positioning and feeding of a printing substrate, the varnishing operation in the varnishing groove inside the transfer plate, and the 3D printing of the varnish on the surface of the printing substrate by using a printing roller and a transfer roller. Before printing the printing substrate, the present application positions the printing substrate by using two positioning frames, thereby ensuring the accuracy of 3D printing on the printing substrate. By injecting varnish into the varnishing groove inside the transfer plate, when 3D printing the printing substrate, the surface of the printing substrate is contacted by the printing roller and the transfer roller, so that the varnish is transferred to the surface of the printing substrate. At the same time, UV light generated by a UV curing lamp is transmitted through the through groove inside the transfer mold for curing, so that the UV varnish is dried and formed on the surface of the printing substrate, and the 3D printing of the varnish on the surface of the printing substrate is completed, thereby achieving high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of printing equipment technology, specifically to a varnish transfer 3D crystal relief printing process and printing equipment. Background Technology

[0002] The surface decoration of printed materials is often achieved through secondary screen printing, hot / cold foil stamping, crystal labels, and aluminum nameplates. However, these methods generally suffer from drawbacks such as requiring specialized equipment (complex operation and expensive equipment), multiple layers of plastic base materials, and relatively thin coatings. Currently, digital spraying equipment on the market suffers from high costs and low efficiency in using varnishes, and the sprayed areas are prone to collapse due to incomplete formation. Furthermore, it was developed to address the limitation of insufficient thickness in screen printing, making it impossible to produce materials with a thickness of 1mm. For example, current digital enhancement equipment processes from domestic and international companies such as Scodix and MGI use spraying technology for printing, which results in a thin coating and low production efficiency.

[0003] To this end, we propose a varnish transfer 3D crystal relief printing process and also disclose the 3D printing equipment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a varnish transfer 3D crystal relief printing process and printing equipment. It utilizes a 3D transparent mold to transfer UV-curable varnish to achieve ultra-high thickness transfer and realize customized special 3D effects on paper.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a varnish transfer 3D crystal relief printing process, specifically comprising the following steps:

[0006] Step 1: Assemble and position the transfer plate;

[0007] Step 2: Then, the substrate is conveyed and positioned so that it enters between the printing roller and the transfer roller along the distance between the two positioning frames;

[0008] Step 3: Pass UV special varnish into the printing roller and perform shearing, stirring and oiling operations on the varnish;

[0009] Step 4: Transfer the varnish onto the surface of the substrate. At the same time, use a UV curing lamp to generate UV light that passes through the channel inside the transfer mold to cure the UV varnish, allowing it to dry and solidify on the surface of the substrate, thus completing the 3D printing of varnish onto the surface of the substrate.

[0010] Preferably, the specific process of assembling and positioning the transfer plate is as follows: to assemble the transfer plate, pull the movable rod upward, slide one side of the transfer plate into the interior of the transfer mold, release the movable rod, and under the action of the elastic potential energy of the spring, push the locking block into the interior of the locking slot to complete the positioning and assembly of the transfer plate on the transfer mold.

[0011] Preferably, the specific process of conveying and positioning the substrate is as follows: the lifting frame is driven down to above the conveyor belt by the drive end of the first servo electric cylinder, so that the bottom of the two positioning frames at the bottom of the lifting frame slides in contact with the upper surface of the conveyor belt. The two positioning frames are simultaneously pushed to one side of the pusher roller by the drive ends of the two second servo electric cylinders, and the substrate is positioned by the two positioning frames.

[0012] Preferably, the specific process of introducing UV special varnish into the printing roller and performing shearing, stirring and oiling operations on the varnish is as follows: UV special varnish is introduced into the shearing chamber through the injection pipe, and the varnish is sheared and stirred inside the shearing chamber using a shearing frame. After shearing and stirring, the viscosity of the varnish becomes thinner, and then the oiling scraper is pushed downward by the drive end of the third servo electric cylinder to perform oiling operations on the varnish tank inside the transfer plate.

[0013] Preferably, the specific process of transferring the varnish onto the surface of the substrate is as follows: the printing roller is moved upward by an electric slide table, the drive gear is rotated by a servo motor, and the printing roller is rotated by the meshing transmission between the surfaces of the drive gear and the driven gear. At the same time, the transfer roller rotates synchronously with the printing roller, and the printing roller and the transfer roller come into contact with the surface of the substrate.

[0014] A varnish transfer 3D crystal relief printing equipment is provided. The printing equipment is used for varnish transfer 3D printing process. The printing equipment includes a fixed frame and a printing roller. Two fixed frames are symmetrically arranged, and a printing roller is arranged between the opposite sides of the two fixed frames. Mounting frames are arranged on both sides of the two fixed frames, and a conveyor belt is arranged on the top of the two mounting frames.

[0015] Preferably, connecting frames are also provided on both sides of the fixed frame, and a pushing mechanism is provided at the bottom of both connecting frames. The pushing mechanism includes a lifting frame, which is located below the connecting frame. Two first servo electric cylinders are provided inside the connecting frame, and the drive ends of the two first servo electric cylinders are connected to the top of the lifting frame. An installation groove is provided at the bottom of the lifting frame, and a plurality of pushing rollers are rotatably arranged inside the installation groove. The bottoms of the plurality of pushing rollers extend to the bottom of the connecting frame, and the plurality of pushing rollers rotate counterclockwise inside the installation groove.

[0016] Preferably, the bottom of the lifting frame is provided with movable grooves on both sides, and a positioning frame is slidably arranged inside each of the two movable grooves. The lower sides of the two positioning frames extend to the bottom of the lifting frame. Sliding rods are provided on both sides inside the movable grooves, and the two sides of the positioning frames are slidably connected to the surfaces of the two sliding rods respectively. A second servo electric cylinder is provided on both sides of the lifting frame, and the drive ends of the two second servo electric cylinders are respectively connected to one side of the two positioning frames.

[0017] Preferably, a transfer roller is provided between the opposite sides of the two fixed frames, and a transfer mechanism is provided on the surface of the transfer roller. An oiling mechanism is also provided on the opposite side of the two fixed frames and above the transfer roller.

[0018] Preferably, the fixed frame is provided with an electric slide, and a mounting block is provided on one side of the electric slide. A driven gear is provided on one side of the mounting block, and one end of the printing roller is connected to the interior of the driven gear. A drive gear is also provided inside the mounting block, and the surface of the drive gear meshes with the surface of the driven gear for transmission. A servo motor is provided on one side of the mounting block, and one end of the output shaft of the servo motor is connected to the interior of the drive gear.

[0019] Preferably, the transfer mechanism includes a transfer plate, a transfer mold is provided on one side of the transfer roller, and a transfer plate is provided on one side of the transfer mold. A varnish groove is provided on one side of the transfer plate, and a through groove that cooperates with the varnish groove is provided inside the transfer mold. A UV curing lamp is also provided inside the transfer roller.

[0020] Preferably, a self-locking component is provided on one side of the transfer mold. The self-locking component includes a locking block and a fixing block. One side of the fixing block is connected to one side of the transfer mold, and a movable plate is slidably provided inside the fixing block. A movable rod is provided inside the movable plate, and a spring is sleeved on the surface of the movable rod. A locking block is also provided at the bottom end of the movable rod, and a locking groove that cooperates with the locking block is provided on the upper surface of the transfer plate.

[0021] Preferably, the oiling mechanism includes an oiling frame, which is disposed between two fixed frames, and an oiling scraper is disposed at the bottom of the oiling frame. A third servo electric cylinder is disposed inside the oiling frame, and the drive end of the third servo electric cylinder is connected to the top of the oiling scraper. A shearing chamber is disposed inside the oiling frame, and a shearing frame is disposed inside the shearing chamber.

[0022] Preferably, the top of the oiling frame is provided with an injection pipe, one end of which is connected to the interior of the shearing chamber, and the interior of the oiling frame is provided with a discharge pipe, which is slidably connected to the top of the oiling scraper.

[0023] Compared with existing technologies, it has the following advantages:

[0024] 1. This invention uses a pre-carved transfer plate as a printing mold, enabling ultra-thick pattern printing. It can be used for pattern printing on the surface of tobacco and alcohol packaging boxes, replacing spray painting processes such as Scodix and MGI, and realizing a new printing method. This invention's process replaces the traditional aluminum plate and TPU process for liquor boxes, offering advantages such as greater environmental friendliness and lower cost. Compared to spray painting, the transfer printing method offers higher production efficiency, reaching over 3000 pieces per hour.

[0025] 2. Before printing, the substrate is positioned using two positioning frames, allowing it to enter between the printing roller and transfer roller along the distance between the two positioning frames. This ensures the accuracy of 3D printing on the substrate. Varnish is injected into the varnish tank inside the transfer plate. During 3D printing, the printing roller and transfer roller contact the surface of the substrate, transferring the varnish to the substrate surface. Simultaneously, UV curing lamps generate UV light that passes through the through-groove inside the transfer mold for curing, allowing the UV varnish to dry and solidify on the substrate surface. This completes the 3D printing of varnish on the substrate surface. The process is highly efficient, achieving ultra-thick customized coatings through transfer printing. The novel technology enhances aesthetics and anti-counterfeiting effects, while also boasting a low failure rate. The overall equipment design references the transfer printing process, resulting in a relatively simple structure.

[0026] 3. By pulling the movable rod upward, one side of the transfer plate is slid into the interior of the transfer mold. Releasing the movable rod allows the spring's elastic potential energy to push the locking block into the slot, completing the positioning and assembly of the transfer plate on the transfer mold. This results in short mold change time, simple molds, and rapid mold changes.

[0027] 4. By setting a shearing chamber in the upper oiling rack, the UV varnish is sheared and stirred. The UV special varnish has special thixotropic properties, that is, it is semi-solid before stirring to facilitate shaping. During shearing and stirring, the viscosity becomes thinner, which facilitates uniform transfer to the concave pattern. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a varnish transfer 3D crystal relief printing process according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a varnish transfer 3D crystal relief printing equipment according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the connecting frame and lifting frame structure according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the bottom structure of the lifting frame according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the fixing frame, printing roller and transfer roller in an embodiment of the present invention;

[0033] Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point A in the middle;

[0034] Figure 7 This is a schematic diagram of the transfer plate and transfer roller structure according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the self-locking component structure according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the product obtained by the varnish transfer 3D crystal relief printing process in an embodiment of the present invention.

[0037] In the diagram, 10 is the fixed frame; 20 is the printing roller; 30 is the mounting frame; 40 is the conveyor belt; 50 is the connecting frame; 60 is the transfer roller; 11 is the lifting frame; 12 is the first servo cylinder; 13 is the mounting slot; 14 is the pusher roller; 15 is the movable slot; 16 is the positioning frame; 17 is the slide bar; 18 is the second servo cylinder; 21 is the electric slide table; 22 is the mounting block; 23 is the driven gear; 24 is the drive gear; 25 is the servo motor; 31 is the transfer plate; 32 is the transfer mold; 33 is the varnish tank; 34 is the UV curing lamp; 41 is the clamping block; 42 is the fixed block; 43 is the movable plate; 44 is the movable rod; 45 is the spring; 51 is the oiling frame; 52 is the oiling scraper; 53 is the third servo cylinder; 54 is the shearing chamber; 55 is the shearing frame; 56 is the injection pipe; and 57 is the discharge pipe. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1 The diagram shown is a schematic flowchart of an embodiment of a varnish transfer 3D crystal relief printing process. Figure 2-8 An embodiment of a varnish transfer 3D crystal relief printing equipment specifically includes the following steps:

[0040] S1: Assemble and position the transfer plate.

[0041] S2: Then the substrate is conveyed and positioned so that it enters between the printing roller and the transfer roller along the distance between the two positioning frames;

[0042] S3: Introduce UV-specific varnish into the printing roller and perform shearing, stirring, and oiling operations on the varnish;

[0043] S4: Transfer the varnish onto the surface of the substrate. At the same time, use a UV curing lamp to generate UV light that passes through the groove inside the transfer mold to cure the UV varnish, allowing it to dry and solidify on the surface of the substrate, thus completing the 3D printing of the varnish onto the surface of the substrate.

[0044] In this embodiment, step S1 specifically includes: assembling the transfer plate 31, pulling the movable rod 44 upward, sliding one side of the transfer plate 31 into the interior of the transfer mold 32, releasing the movable rod 44, and pushing the locking block 41 into the interior of the locking slot under the elastic potential energy of the spring 45, thereby completing the positioning and assembly of the transfer plate 31 on the transfer mold 32.

[0045] In this embodiment, step S2 specifically includes: conveying the substrate, driving the lifting frame 11 to descend above the conveyor belt 40 through the drive end of the first servo electric cylinder 12, so that the bottom of the two positioning frames 16 at the bottom of the lifting frame 11 slides in contact with the upper surface of the conveyor belt 40, and simultaneously pushing the two positioning frames 16 to one side of the pusher roller 14 through the drive ends of the two second servo electric cylinders 18, using the two positioning frames 16 to position the substrate, so that the substrate enters between the printing roller 20 and the transfer roller 60 along the distance between the two positioning frames 16.

[0046] In this embodiment, step S3 specifically includes: using the injection pipe 56 to introduce UV special varnish into the shearing chamber 54, using the shearing frame 55 to shear and stir the varnish inside the shearing chamber 54, the viscosity of the varnish becomes thinner after shearing and stirring, and then the oiling scraper 52 is pushed downward by the drive end of the third servo electric cylinder 53, and the oiling scraper 52 is used to perform oiling operation on the inside of the varnish tank 33 on the transfer plate 31.

[0047] In this embodiment, step S4 specifically includes: using the electric slide table 21 to drive the printing roller 20 to move upward, using the servo motor 25 to drive the drive gear 24 to rotate, using the meshing transmission between the surfaces of the drive gear 24 and the driven gear 23 to drive the printing roller 20 to rotate, and at the same time, the transfer roller 60 rotates synchronously with the printing roller 20, using the contact between the printing roller 20 and the transfer roller 60 to make the surface of the substrate, so that the varnish is transferred to the surface of the substrate, and at the same time, using the UV curing lamp 34 to generate UV light to pass through the through groove inside the transfer mold 32 for curing, so that the UV varnish dries and forms on the surface of the substrate, thus completing the 3D printing of varnish on the surface of the substrate.

[0048] In this embodiment, the production speed is: max 5000 PC / hour; the varnish thickness range is: 0.05-0.5mm; the varnish drying conditions are: LED fixed wavelength drying, which will not cause back-sticking; the varnish transfer requirement is: 100% transfer; the varnish refractive index is: 1.55-1.65; the applicable substrates are: PET / BOPP glossy adhesive, matte film, transfer paper (copper plate, white card, etc.), acrylic / PS material sheets, metallized film materials, and all other non-absorbent materials.

[0049] Furthermore, it also includes engraving a shape of a predetermined depth on the transfer plate 31, such as using a laser machine or engraving machine to engrave a customer-customized pattern on the surface of transparent flexible Teflon or ABS material, with the pattern portion recessed, serving as the transfer plate 31.

[0050] Resin varnish can be tinted to mimic the appearance of jade and glass, essentially like attaching a jade plaque to the surface of the packaging.

[0051] The process embodiment of this invention uses a pre-carved transfer plate as a printing mold, which can achieve pattern printing with ultra-high thickness (1-3mm), such as... Figure 9 The diagram shows a product printed using this process embodiment. It can be used for printing patterns on the surface of tobacco and alcohol packaging boxes, replacing spray painting processes such as Scodix and MGI, thus realizing a new printing method. This invention replaces the traditional aluminum plate and TPU process for liquor boxes, offering advantages such as greater environmental friendliness and lower cost. Employing a transfer printing method, it achieves higher production efficiency compared to spray painting, reaching over 3000 pieces per hour.

[0052] This invention also provides an embodiment of a varnish transfer 3D crystal relief printing equipment, please refer to the following: Figure 2-8 The printing equipment is used for varnish transfer 3D printing. The printing equipment includes a fixed frame 10 and a printing roller 20. Two fixed frames 10 are symmetrically arranged, and the printing roller 20 is arranged between the opposite sides of the two fixed frames 10. Mounting frames 30 are arranged on both sides of the two fixed frames 10, and conveyor belts 40 are arranged on the top of the two mounting frames 30. The left conveyor belt 40 is used to transport the substrate. After the substrate is 3D printed by the printing roller 20, the right conveyor belt 40 is used to send the substrate out, completing the varnish transfer 3D printing of the substrate.

[0053] The fixed frame 10 is also provided with connecting frames 50 on both sides, and the bottom of the two connecting frames 50 is provided with a pushing mechanism. When the substrate is transported by the conveyor belt 40, the pushing mechanism above is used to position and transport the substrate, ensuring the accuracy of the varnish transfer position of the printing roller 20 on the substrate and avoiding printing position errors.

[0054] A transfer roller 60 is provided between the two fixed frames 10 on opposite sides, and a transfer mechanism is provided on the surface of the transfer roller 60. An oiling mechanism is also provided on the opposite side of the two fixed frames 10 and above the transfer roller 60. The oiling mechanism injects varnish into the transfer mechanism on the surface of the transfer roller 60, and then works with the transfer mechanism on the surface of the transfer roller 60 to achieve varnish transfer 3D printing on the substrate.

[0055] Furthermore, the pushing mechanism includes a lifting frame 11, which is located below the connecting frame 50. Two first servo cylinders 12 are installed inside the connecting frame 50, and the drive ends of both first servo cylinders 12 are connected to the top of the lifting frame 11. The drive ends of the two first servo cylinders 12 drive the lifting frame 11 to move downwards. A mounting groove 13 is provided at the bottom of the lifting frame 11, and several pushing rollers 14 are rotatably mounted inside the mounting groove 13. The bottoms of the pushing rollers 14 extend to... Below the connecting frame 50, several pusher rollers 14 are located inside the mounting groove 13 and rotate counterclockwise. One end of each pusher roller 14 is synchronously connected by a pulley, which is driven by a motor. After the lifting frame 11 is lowered above the conveyor belt 40 by the drive end of the first servo cylinder 12, the bottom of the pusher roller 14 contacts the upper surface of the substrate. The counterclockwise rotating pusher roller 14, in conjunction with the conveyor belt 40, feeds the substrate between the printing roller 20 and the transfer roller 60.

[0056] Furthermore, to prevent positional deviation of the substrate during printing between the printing roller 20 and the transfer roller 60, movable grooves 15 are provided on both sides of the bottom of the lifting frame 11, and positioning frames 16 are slidably arranged inside the two movable grooves 15. The lower sides of the two positioning frames 16 extend to the bottom of the lifting frame 11. Slide rods 17 are provided on both sides inside the movable grooves 15, and the two sides of the positioning frames 16 are slidably connected to the surfaces of the two slide rods 17 respectively. Second servo electric cylinders 18 are provided on both sides of the lifting frame 11, and the drive ends of the two second servo electric cylinders 18 are respectively connected to one side of the two positioning frames 16.

[0057] It should be noted that when conveying the substrate, the lifting frame 11 is lowered above the conveyor belt 40 by the drive end of the first servo electric cylinder 12, so that the bottom of the two positioning frames 16 at the bottom of the lifting frame 11 slides in contact with the upper surface of the conveyor belt 40. When the substrate is fed between the printing roller 20 and the transfer roller 60, the two positioning frames 16 are simultaneously pushed to one side of the pusher roller 14 by the drive ends of the two second servo electric cylinders 18. The two positioning frames 16 are used to position the substrate, so that the substrate enters between the printing roller 20 and the transfer roller 60 along the distance between the two positioning frames 16, thereby ensuring the accuracy of 3D printing on the substrate.

[0058] Furthermore, the fixed frame 10 is equipped with an electric slide 21, and a mounting block 22 is provided on one side of the electric slide 21. A driven gear 23 is provided on one side of the mounting block 22, and one end of the printing roller 20 is connected to the interior of the driven gear 23. A drive gear 24 is also provided inside the mounting block 22, and the surface of the drive gear 24 meshes with the surface of the driven gear 23 for transmission. A servo motor 25 is provided on one side of the mounting block 22, and one end of the output shaft of the servo motor 25 is connected to the interior of the drive gear 24. The electric slide 21 drives the printing roller 20 to move up and down between the two fixed frames 10, thereby realizing the transfer of varnish 3D printing between the printing roller 20 and the transfer roller 60. The servo motor 25 drives the drive gear 24 to rotate, and the meshing transmission between the surfaces of the drive gear 24 and the driven gear 23 drives the printing roller 20 to rotate.

[0059] Furthermore, the transfer mechanism includes a transfer plate 31, a transfer mold 32 on one side of the transfer roller 60, and a transfer plate 31 on one side of the transfer mold 32. A varnish tank 33 is provided on one side of the transfer plate 31. The transfer plate 31 is made of transparent flexible Teflon or ABS material, and customized patterns are engraved by a laser machine or engraving machine. The depth of the varnish tank 33 is 1-3mm. The interior of the transfer mold 32 is provided with a through groove that matches the varnish tank 33. The interior of the transfer roller 60 is also provided with a UV curing lamp 34. By injecting varnish into the varnish tank 33 inside the transfer plate 31, when 3D printing the substrate, the printing roller 20 and the transfer roller 60 contact the surface of the substrate, allowing the varnish to be transferred to the surface of the substrate. At the same time, the UV curing lamp 34 generates UV light that passes through the through groove inside the transfer mold 32 to cure the UV varnish, allowing it to dry and solidify on the surface of the substrate, thus completing the varnish 3D printing on the surface of the substrate.

[0060] Furthermore, a self-locking assembly is provided on one side of the transfer mold 32. The self-locking assembly includes a locking block 41 and a fixing block 42. One side of the fixing block 42 is connected to one side of the transfer mold 32, and a movable plate 43 is slidably arranged inside the fixing block 42. A movable rod 44 is arranged inside the movable plate 43, and a spring 45 is sleeved on the surface of the movable rod 44. The bottom end of the movable rod 44 is also provided with a locking block 41, and the upper surface of the transfer plate 31 is provided with a slot that cooperates with the locking block 41. When assembling the transfer plate 31, the movable rod 44 is pulled upward to slide one side of the transfer plate 31 into the interior of the transfer mold 32. The movable rod 44 is then released, and the locking block 41 is pushed into the slot under the elastic potential energy of the spring 45, thus completing the positioning and assembly of the transfer plate 31 on the transfer mold 32.

[0061] Furthermore, the oiling mechanism includes an oiling frame 51, which is positioned between two fixed frames 10. An oiling scraper 52 is located at the bottom of the oiling frame 51. A third servo cylinder 53 is installed inside the oiling frame 51, and the drive end of the third servo cylinder 53 is connected to the top of the oiling scraper 52. A shearing chamber 54 is located inside the oiling frame 51, and a shearing frame 55 is installed inside the shearing chamber 54. One end of the shearing frame 55 is driven by a motor. An injection pipe 56 is located at the top of the oiling frame 51, and one end of the injection pipe 56 is connected to the inner wall of the shearing chamber 54. The upper oiling rack 51 is connected to the upper oiling plate 31. The upper oiling rack 51 is equipped with a discharge pipe 57, and the discharge pipe 57 is slidably connected to the top of the upper oiling scraper 52. The discharge pipe 57 is connected to the shearing chamber 54. UV special varnish is introduced into the shearing chamber 54 through the injection pipe 56. The varnish is sheared and stirred by the shearing rack 55 inside the shearing chamber 54. After shearing and stirring, the viscosity of the varnish becomes thinner. Then, the upper oiling scraper 52 is pushed down by the drive end of the third servo electric cylinder 53. The upper oiling scraper 52 is used to perform oiling operation on the varnish tank 33 inside the transfer plate 31.

[0062] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A varnish transfer 3D crystal relief printing device, the printing device being used for varnish transfer 3D printing process, the printing device comprising a fixed frame (10) and a printing roller (20), two fixed frames (10) being symmetrically arranged, and a printing roller (20) being arranged between opposite sides of the two fixed frames (10), mounting frames (30) being arranged on both sides of the two fixed frames (10), and a conveyor belt (40) being arranged on the top of the two mounting frames (30), and connecting frames (50) being arranged on both sides of the fixed frames (10), and a pushing mechanism being arranged at the bottom of the two connecting frames (50), the pushing mechanism comprising a lifting frame (11), the lifting frame (11) Set below the connecting frame (50), the connecting frame (50) is provided with two first servo electric cylinders (12) inside, and the driving ends of the two first servo electric cylinders (12) are connected to the top of the lifting frame (11). The bottom of the lifting frame (11) is provided with a mounting groove (13), and a number of push rollers (14) are rotatably arranged inside the mounting groove (13). The bottom of the number of push rollers (14) extends to the bottom of the connecting frame (50), and the number of push rollers (14) rotate counterclockwise inside the mounting groove (13). Movable grooves (15) are also provided on both sides of the bottom of the lifting frame (11), and the interior of the two movable grooves (15) Both positioning frames (16) are slidably arranged, and the lower sides of both positioning frames (16) extend to the bottom of the lifting frame (11). Slide rods (17) are provided on both sides inside the movable groove (15), and the two sides of the positioning frames (16) are slidably connected to the surfaces of the two slide rods (17). Second servo cylinders (18) are provided on both sides of the lifting frame (11), and the drive ends of the two second servo cylinders (18) are respectively connected to one side of the two positioning frames (16). A transfer roller (60) is provided between the opposite sides of the two fixed frames (10), and a transfer mechanism is provided on the surface of the transfer roller (60). The two fixed frames (10) are located on opposite sides and... An oiling mechanism is also provided above the transfer roller (60). An electric slide (21) is provided inside the fixed frame (10), and a mounting block (22) is provided on one side of the electric slide (21). A driven gear (23) is provided on one side of the mounting block (22), and one end of the printing roller (20) is connected to the interior of the driven gear (23). A drive gear (24) is also provided inside the mounting block (22), and the surface of the drive gear (24) meshes with the surface of the driven gear (23) for transmission. A servo motor (25) is provided on one side of the mounting block (22), and one end of the output shaft of the servo motor (25) is connected to the interior of the drive gear (24). The transfer mechanism includes a transfer plate (31), a transfer mold (32) is provided on one side of the transfer roller (60), and a transfer plate (31) is provided on one side of the transfer mold (32). A varnish tank (33) is provided on one side of the transfer plate (31), and a through groove that cooperates with the varnish tank (33) is provided inside the transfer mold (32). A UV curing lamp (34) is also provided inside the transfer roller (60). A self-locking assembly is provided on one side of the transfer mold (32). The component includes a locking block (41) and a fixing block (42). One side of the fixing block (42) is connected to one side of the transfer mold (32), and a movable plate (43) is slidably arranged inside the fixing block (42). A movable rod (44) is arranged inside the movable plate (43), and a spring (45) is sleeved on the surface of the movable rod (44). The bottom end of the movable rod (44) is also provided with a locking block (41), and the upper surface of the transfer plate (31) is provided with a slot that cooperates with the locking block (41). The oiling mechanism includes an oiling frame (51), which is located between two fixed frames (10). An oiling scraper (52) is provided at the bottom of the oiling frame (51). A third servo cylinder (53) is provided inside the oiling frame (51), and the drive end of the third servo cylinder (53) is connected to the top of the oiling scraper (52). A shearing chamber (54) is provided inside the oiling frame (51), and a shearing frame (55) is provided inside the shearing chamber (54). An injection pipe (56) is provided at the top of the oiling frame (51), and one end of the injection pipe (56) is connected to the inside of the shearing chamber (54). An outlet pipe (57) is provided inside the oiling frame (51), and the inside of the outlet pipe (57) is slidably connected to the top of the oiling scraper (52).

2. A varnish transfer 3D crystal relief printing process, applied to the varnish transfer 3D crystal relief printing equipment described in claim 1, characterized in that: Specifically, the following steps are included: Step 1: Assemble and position the transfer plate (31); Step 2: The substrate is then conveyed and positioned so that it enters between the printing roller (20) and the transfer roller (60) along the distance between the two positioning frames (16); Step 3: Pass UV special varnish into the printing roller (20) and perform shearing, stirring and oiling operations on the varnish; Step 4: Transfer the varnish onto the surface of the substrate. At the same time, use a UV curing lamp (34) to generate UV light that passes through the channel inside the transfer mold (32) to cure the UV varnish, allowing it to dry and solidify on the surface of the substrate, thus completing the 3D printing of the varnish on the surface of the substrate.

3. The varnish transfer 3D crystal relief printing process according to claim 2, characterized in that: The specific process of assembling and positioning the transfer plate is as follows: assemble the transfer plate (31), pull the movable rod (44) upward, slide one side of the transfer plate (31) into the interior of the transfer mold (32), release the movable rod (44), and under the action of the elastic potential energy of the spring (45), push the locking block (41) into the interior of the locking slot to complete the positioning assembly of the transfer plate (31) on the transfer mold (32).

4. The varnish transfer 3D crystal relief printing process according to claim 2, characterized in that: The specific process of conveying and positioning the substrate is as follows: the lifting frame (11) is driven down to the top of the conveyor belt (40) by the drive end of the first servo cylinder (12), so that the bottom of the two positioning frames (16) at the bottom of the lifting frame (11) slides in contact with the upper surface of the conveyor belt (40). The two positioning frames (16) are simultaneously pushed to move towards one side of the pusher roller (14) by the drive ends of the two second servo cylinders (18), and the substrate is positioned by the two positioning frames (16).

5. The varnish transfer 3D crystal relief printing process according to claim 2, characterized in that: The specific process of introducing UV special varnish into the printing roller (20) and performing shearing, stirring and oiling operations on the varnish is as follows: UV special varnish is introduced into the shearing chamber (54) through the injection pipe (56). Inside the shearing chamber (54), the varnish is sheared and stirred by the shearing frame (55). After shearing and stirring, the viscosity of the varnish becomes thinner. Then, the oiling scraper (52) is pushed down by the drive end of the third servo electric cylinder (53). The oiling scraper (52) is used to perform oiling operations on the varnish tank (33) of the transfer plate (31).

6. The varnish transfer 3D crystal relief printing process according to claim 2, characterized in that: The specific process of transferring the varnish onto the surface of the substrate is as follows: the printing roller (20) is moved upward by the electric slide (21), and the drive gear (24) is rotated by the servo motor (25). The printing roller (20) is rotated by the meshing transmission between the surfaces of the drive gear (24) and the driven gear (23). At the same time, the transfer roller (60) rotates synchronously with the printing roller (20), and the printing roller (20) and the transfer roller (60) make contact with the surface of the substrate.

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