Transfer printing device and printing process

Abstract

The invention discloses a transfer device and a printing process method, the printing process method comprises first spraying UV varnish on the surface of a transfer roller and curing it to form a peelable layer, then spraying UV ink on the peelable layer and curing it to form an image layer, then spraying UV light-curing glue on the image layer and curing it for the first time, then transferring it to a printing substrate by pressing a printing roller and a transfer roller, and finally completely curing the UV light-curing glue by a mercury lamp. The transfer process method of the invention does not need to increase the viscosity of the transfer ink by heating the transfer roller, the UV light-curing glue is first cured by a third UV curing lamp, the highly viscous UV light-curing glue can be directly adhered to the printing substrate during transfer, and the short-wave initiator in the UV light-curing glue can be photocured by a fourth UV curing lamp, so that the highly viscous UV light-curing glue is completely cured, effectively improving the reliability of the transfer, and the printed pattern and the printing substrate are seamlessly printed.

Description

Technical Field

[0001] The invention relates to the field of printing technology, and in particular to a transfer device and a printing process method. Background Art

[0002] The conventional inkjet printing method is direct printing, which has a simple structure and low cost. However, direct printing also has some disadvantages. For example, the surface properties of various printing substrates are different, and it is difficult for inkjet ink to adapt to the surface of various printing substrates. Therefore, it is often necessary to pre-coat the printing substrate, or replace different types of ink according to different printing substrates, which greatly reduces efficiency. In addition, in the direct printing process, the distance between the nozzle and the paper must be very close, and when the paper runs at high speed under the nozzle, the slightest fluctuation in its tension may cause it to bulge and rub against the nozzle.

[0003] Compared with direct printing, indirect transfer can effectively overcome the above-mentioned defects of direct printing. The indirect transfer method is to first spray the ink droplets onto the intermediate transfer material and then transfer them to the printing substrate. Since the characteristics of the intermediate transfer material are fixed, the ink to be printed only needs to adapt to the intermediate transfer material, thereby greatly reducing the requirements for the printing substrate and the requirements for changes in ink performance. There is no need to adjust the height position of the nozzle according to the different thicknesses of the printing substrate to correct the trigger time relationship between the colors during printing, and the intermediate transfer material can be a rotating body with a fixed structure such as a plate roller, which will not scratch or collide with the nozzle during high-speed operation. The nozzle can be as close to the surface of the transfer roller as possible during printing, and the landing point position of the nozzle ink droplets is more accurate, and the nozzle will not be affected by dust on the printing substrate. Stable printing.

[0004] The Chinese invention patent application with patent publication number CN109624540B discloses an inkjet printing method, which uses a rotating roller with a chrome-plated surface as an intermediate transfer body. Before printing, UV varnish is first sprayed onto the surface of the intermediate transfer body to form a varnish layer, and then UV ink is sprayed on the varnish layer to form an image layer. Subsequently, the circumferential surface of the intermediate transfer body superimposed with the varnish layer and the image layer is passed through a UV curing device with a wavelength range of 360-420nm to cure the image layer for the first time, and at the same time, the surface of the intermediate transfer body is heated to reduce the viscosity of the varnish layer. Finally, the superimposed image layer and varnish layer are transferred from the intermediate transfer body to a printing substrate, and the printing substrate with the image transferred thereon is sequentially passed through a UV curing device with a wavelength range of 360-420nm and a UV curing device including a wavelength <360nm, and the output light intensity is adjusted to thoroughly cure the image layer and the varnish layer.

[0005] The inkjet printing method disclosed in the above-mentioned Chinese invention patent application passes the circumferential surface of the intermediate transfer body superimposed with the varnish layer and the image layer through a UV curing device with a wavelength range of 360-420nm to cure the image layer for the first time, and at the same time heats the surface of the intermediate transfer body to reduce the viscosity of the varnish layer. In this process, the surface of the intermediate transfer body needs to be heated, which not only makes temperature control difficult, but also requires the intermediate transfer body to be cooled down later to avoid the varnish layer of the next indirect transfer from being affected by the excessively high surface temperature. In addition, the patent describes the purpose of transfer by heating to soften the varnish layer and the image layer so that they have adhesiveness. This will result in the risk that the heated coating will have adhesiveness with the intermediate transfer body, which will result in the risk of not being able to be fully transferred and the coating remaining on the intermediate transfer body. For this reason, we propose a transfer device and a printing process method. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a transfer device and a printing process method.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a transfer device, comprising a rotatably arranged transfer roller, a printing assembly is suspended above the circumference of the transfer roller, a pressing roller is arranged below the circumference of the transfer roller, the printing assembly comprises a first nozzle group for printing UV varnish, a second nozzle group for printing UV ink, and a third nozzle group for printing UV light curing glue, the second nozzle group is arranged between the first nozzle group and the third nozzle group,

[0008] A first UV curing lamp for curing the sprayed UV varnish to form a peelable layer is provided between the first nozzle group and the second nozzle group, a second UV curing lamp for curing the sprayed UV ink is provided between the second nozzle group and the third nozzle group, the third nozzle group is provided between the second UV curing lamp and the third UV curing lamp, the third UV curing lamp is used to perform a first curing of the sprayed UV light-curing glue and make it highly viscous, and a fourth UV curing lamp is provided along the output direction after the printing substrate is printed, the fourth UV curing lamp is used to completely cure the UV light-curing glue transferred to the printing substrate.

[0009] A printing process method, based on the above transfer device, includes the following steps:

[0010] S1, the first nozzle group sprays UV varnish on the surface of the transfer roller;

[0011] S2, the transfer roller rotates counterclockwise so that the UV varnish sprayed in step S1 faces the first UV curing lamp, and the first UV curing lamp performs light curing on the UV varnish sprayed on the transfer roller to form a peelable layer;

[0012] S3, the transfer roller rotates counterclockwise to make the peelable layer formed in step S2 turn to the second nozzle group, and the second nozzle group sprays UV ink on the peelable layer;

[0013] S4, the transfer roller rotates counterclockwise so that the UV ink sprayed in step S3 faces the second UV curing lamp, and the second UV curing lamp performs light curing on the UV ink and forms an image layer on the upper surface of the peelable layer;

[0014] S5, the transfer roller rotates counterclockwise to make the image layer formed in step S4 turn to the third nozzle group, and the third nozzle group sprays UV light curing glue on the image layer;

[0015] S6, the transfer roller rotates counterclockwise, so that the UV light curing glue sprayed in step S5 faces the third UV curing lamp, and the third UV curing lamp performs a first curing on the UV light curing glue and makes it highly viscous, and the UV light curing glue forms a transfer adhesion layer on the upper surface of the image layer;

[0016] S7, the transfer roller rotates counterclockwise to transfer the overlapping peelable layer, image layer, and transfer adhesive layer to the printing substrate, wherein the transfer adhesive layer is located at the bottom layer on the surface of the printing substrate, and the peelable layer is located at the top layer on the surface of the printing substrate;

[0017] S8. The printing substrate is transported to the fourth UV curing lamp for illumination, so that the highly viscous transfer adhesive layer is completely cured, thereby completing the transfer.

[0018] Specifically, the formula of the UV light curing adhesive includes the following raw materials in weight percentage: 30-43% monomer A, 30-40% monomer B, 1-5% long-wave initiator, 5-15% short-wave initiator, 3-8% auxiliary agent, and 5-15% resin.

[0019] The beneficial effects of the present invention are:

[0020] First, the present invention first sprays UV varnish on the surface of the transfer roller and solidifies it to form a peelable layer, then sprays UV ink on the peelable layer and solidifies it to form an image layer, then sprays UV light-curing glue on the image layer and performs the first curing to make it highly viscous to form a three-layer structure, then transfers it to the printing substrate through the transfer roller, and finally completely cures the UV light-curing glue through the fourth UV curing lamp;

[0021] During the whole process, there is no need to heat the transfer roller to increase the viscosity of the transfer ink. Instead, the third UV curing lamp (i.e., LED UV lamp) can produce a photocuring initiation effect on the long-wave initiator in the UV light-curing adhesive, so that the UV light-curing adhesive is cured for the first time to form a viscous adhesive fluid. By properly adjusting the components of the long-wave photoinitiator and the short-wave photoinitiator in the formula, the viscosity after the curing can be easily adjusted, so that it does not rely on adjusting the light intensity of the third UV curing lamp to control the viscosity, and the process stability is stronger;

[0022] The highly viscous UV light-curing adhesive can directly adhere to the substrate during transfer printing, and the fourth UV curing lamp (i.e., mercury lamp) can produce a photocuring initiation effect on the short-wave initiator in the UV light-curing adhesive, so that the highly viscous UV light-curing adhesive is completely cured, which effectively improves the reliability of transfer printing;

[0023] Second, the peeling layer of the present invention is in a solidified state during transfer, so the texture on the surface of the transfer roller can be perfectly and precisely transferred in pairs. By replacing different roller panels on the surface of the transfer roller, printing plates with different textures are made at different roller panels to achieve transfer with different texture effects. For example, if a printing plate with a special paper texture is replaced, the image and text after the inkjet transfer will have the special paper texture. If a holographic printing plate with an optical structure is used, a dual holographic light pattern transfer can be formed.

[0024] 3. The present invention greatly improves the printability for different printing substrates. Compared with the existing direct printing process, the present invention directly contacts the printing substrate through a highly adhesive transfer adhesive layer, which is suitable for firmly bonding various printing substrates, greatly expanding the printability of the substrate, and the printed pattern and the printing substrate present a seamless printing effect;

[0025] Fourth, the present invention forms a transfer adhesive layer on the upper surface of the image layer by UV light curing adhesive. During transfer, the highly adhesive transfer adhesive layer is in direct contact with the printing substrate. Compared with the existing direct printing process, the ink will not penetrate into the surface of the printing substrate and affect the surface color of the printing substrate, thereby effectively ensuring that the color effect of the ink itself can be perfectly presented on different printing substrates.

[0026] 5. The present invention prints UV ink on the peelable layer and solidifies it to form an image layer. The shrinkage effect between the material molecules of the UV ink is directly completed when solidifying on the roller surface, and the internal stress between the material molecules is completely released. Compared with the existing direct printing process, the UV ink will not be affected by the wrinkling of the surface of the printing substrate with a thinner material (such as a film-type printing substrate), thereby effectively solving the current printing problem for the printing substrate with a thinner material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0029] Figure 3 It is a structural schematic diagram when the cam member is deflected 90° clockwise to connect the clutch device to the first nozzle group.

[0030] Figure 4 It is a schematic diagram of the structure when the first nozzle group sprays UV varnish on the surface of the transfer roller.

[0031] Figure 5 It is a schematic diagram of the structure when the first UV curing lamp performs light curing on the UV varnish sprayed on the transfer roller to form a peelable layer.

[0032] Figure 6 It is a schematic diagram of the structure when the second nozzle group sprays UV ink on the peelable layer.

[0033] Figure 7 The schematic diagram of the structure is when the second UV curing lamp performs light curing on the UV ink and forms an image layer on the upper surface of the strippable layer.

[0034] Figure 8 It is a structural schematic diagram of the third nozzle group spraying UV light curing glue on the surface of the transfer roller.

[0035] Fig. 9 This is a schematic diagram of the structure when the third UV curing lamp performs the first curing on the UV light curing adhesive and forms a transfer adhesive layer on the upper surface of the image layer.

[0036] Fig.10 It is a schematic diagram of the structure of the transfer roller when transferring.

[0037] Fig.11 It is a schematic diagram of the structure when the fourth UV curing lamp completely cures the highly viscous UV light curing glue.

[0038] Fig.12 It is a schematic diagram of the structure of the clutch device.

[0039] Fig.13 It is a schematic diagram of the transfer steps of the peelable layer, the image layer, and the transfer adhesive layer in the entire printing process.

[0040] Reference numerals: 10, transfer roller; 11, embossing roller; 21, first nozzle group; 211, first connecting arm; 2111, first plug hole; 22, second nozzle group; 221, movable mounting seat; 2211, second plug hole; 23, third nozzle group; 231, third connecting arm; 2311, third plug hole; 31, first UV curing lamp; 32, second UV curing lamp; 33, third UV curing lamp; 34, fourth UV curing lamp;

[0041] 40. Translation drive device; 50. Clutch device; 501. Vacant area; 51. First clutch connection block; 511. First plug portion; 512. Concave platform portion; 52. Second clutch connection block; 521. Second plug portion; 53. Third clutch connection block; 531. Third plug portion; 54. Moving frame; 541. First plug through hole; 542. Second plug through hole; 543. Third plug through hole; 55. Cam member; 56. Servo motor; 57. First compression spring; 58. Second compression spring; 59. Third compression spring; 61. UV varnish; 62. Peelable layer; 63. UV ink; 64. Image layer; 65. UV light curing glue; 66. Transfer adhesive layer; 70. Printing substrate. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Specific embodiment 1: Combined with the attached Figure 1 and attached Figure 2 As shown, a transfer device includes a transfer roller 10 that is rotatably arranged. The transfer roller 10 includes a roller inner frame and a roller panel that is detachably mounted on the roller inner frame. The roller panel is covered on the outer cylindrical surface of the roller inner frame. Different texture patterns can be engraved on different roller panels.

[0044] A printing assembly is suspended above the circumference of the transfer roller 10, and a embossing roller 11 is provided below the circumference of the transfer roller 10. The printing assembly includes a first nozzle group 21 for printing UV varnish, a second nozzle group 22 for printing UV ink, and a third nozzle group 23 for printing UV light curing glue. The second nozzle group 22 is arranged between the first nozzle group 21 and the third nozzle group 23. The second nozzle group 22 can be movable or fixed.

[0045] A first UV curing lamp 31 is provided between the first nozzle group 21 and the second nozzle group 22 for curing the sprayed UV varnish to form a peelable layer. Since the UV varnish is cured at the roller panel of the transfer roller to form a peelable layer, the texture pattern at the roller panel can be directly printed on the peelable layer, so that the printed pattern presents a natural texture effect;

[0046] A second UV curing lamp 32 for curing the sprayed UV ink is provided between the second nozzle group 22 and the third nozzle group 23. The third nozzle group 23 is provided between the second UV curing lamp 32 and the third UV curing lamp 33. The third UV curing lamp 33 is used to perform the first curing of the sprayed UV light curing glue and make it highly viscous. A fourth UV curing lamp 34 is provided along the output direction after the printing substrate is pressed. The fourth UV curing lamp 34 is used to completely cure the UV light curing glue transferred to the printing substrate. The first UV curing lamp 31, the second UV curing lamp 32, and the third UV curing lamp 33 are all LED UV lamps, and the LED UV lamp is preferably a 395nm LED UV lamp. The fourth UV curing lamp 34 is a mercury lamp.

[0047] A printing process method, characterized in that: the above-mentioned transfer device includes the following steps:

[0048] S1, the first nozzle group 21 sprays UV varnish on the surface of the transfer roller 10;

[0049] S2, the transfer roller 10 rotates counterclockwise, so that the UV varnish sprayed in step S1 faces the first UV curing lamp 31, and the first UV curing lamp 31 performs light curing on the UV varnish sprayed on the transfer roller 10 to form a peelable layer;

[0050] S3, the transfer roller 10 rotates counterclockwise to make the peelable layer formed in step S2 turn to the second nozzle group 22, and the second nozzle group 22 sprays UV ink on the peelable layer;

[0051] S4, the transfer roller 10 rotates counterclockwise so that the UV ink sprayed in step S3 faces the second UV curing lamp 32, and the second UV curing lamp 32 performs light curing on the UV ink and forms an image layer on the upper surface of the peelable layer;

[0052] S5, the transfer roller 10 rotates counterclockwise to make the image layer formed in step S4 turn to the third nozzle group 23, and the third nozzle group 23 sprays UV light curing glue on the image layer;

[0053] S6, the transfer roller 10 rotates counterclockwise, so that the UV light curing glue sprayed in step S5 faces the third UV curing lamp 33, and the third UV curing lamp 33 performs a first curing on the UV light curing glue and makes it highly viscous, and the UV light curing glue forms a transfer adhesive layer on the upper surface of the image layer;

[0054] S7, the transfer roller 10 rotates counterclockwise, and the embossing roller 11 presses the printing substrate and the transfer roller tightly together, so that the adhesive layer and the printing substrate form a higher bonding force, overcoming the lower bonding force between the peelable layer and the surface of the transfer roller, and the peelable layer, the image layer, and the transfer adhesive layer are sequentially overlapped and transferred to the printing substrate. At this time, the transfer adhesive layer is located at the bottom layer on the surface of the printing substrate, and the peelable layer is located at the top layer on the surface of the printing substrate;

[0055] S8, the printing substrate is transported to the fourth UV curing lamp 34 for illumination, so that the highly viscous transfer adhesive layer is completely cured, and the printing substrate and the image layer are firmly bonded, thereby completing the transfer.

[0056] The formula of UV light-curing adhesive includes the following raw materials in weight percentage: 30-43% monomer A, 30-40% monomer B, 1-5% long-wave initiator, 5-15% short-wave initiator, 3-8% auxiliary agent, and 5-15% resin. The light-curing adhesive can form a colloid of corresponding viscosity under long-wave UV curing according to the adjustment of the formula ratio, and then fully cure under short-wave UV curing. By properly adjusting the components of the long-wave photoinitiator and the short-wave photoinitiator in the formula, the viscosity after the curing can be easily adjusted, so that it does not rely on adjusting the light intensity of the third UV curing lamp to control the viscosity, and the process stability is stronger.

[0057] Monomer A and monomer B can be monofunctional, such as IBOA, TMCHA, CTFA, THF, etc., or difunctional or polyfunctional, such as HDDA, TPGDA, NPGDA, DPGDA, TMPHTA, DPHA, etc. The resin can be a prepolymer containing acrylic groups such as epoxy polyester and polyurethane. The auxiliary agent can be a silicone or non-silicone defoamer, leveling agent, etc. The long-wave initiator can be TPO, TPO-L, TMO, 369, 907, etc. or their macromolecular derivatives. The short-wave initiator can be BP, 1173, 184, etc. and their derivatives or macromolecular derivatives.

[0058] Specific embodiment 2: Combined with the attached Figure 1 and attached Figure 2 As shown, a transfer device includes a rotatably arranged transfer roller 10, a printing assembly is suspended above the circumference of the transfer roller 10, a pressing roller 11 is arranged below the circumference of the transfer roller 10, and the printing assembly includes a first nozzle group 21 for printing UV varnish, a second nozzle group 22 for printing UV ink, and a third nozzle group 23 for printing UV light curing glue. The second nozzle group 22 is arranged between the first nozzle group 21 and the third nozzle group 23.

[0059] A first UV curing lamp 31 is provided between the first nozzle group 21 and the second nozzle group 22 for curing the sprayed UV varnish to form a peelable layer, a second UV curing lamp 32 is provided between the second nozzle group 22 and the third nozzle group 23 for curing the sprayed UV ink, the third nozzle group 23 is provided between the second UV curing lamp 32 and the third UV curing lamp 33, the third UV curing lamp 33 is used to perform the first curing of the sprayed UV light curing glue and make it highly viscous, and a fourth UV curing lamp 34 is provided along the output direction after the printing substrate is pressed, and the fourth UV curing lamp 34 is used to completely cure the UV light curing glue transferred to the printing substrate. The first UV curing lamp 31, the second UV curing lamp 32, and the third UV curing lamp 33 are all LED UV lamps, and the fourth UV curing lamp 34 is a mercury lamp.

[0060] Combined with Figure 2 and attached Fig.12 As shown, the second specific embodiment also includes a translation drive device 40 and a clutch device 50. The clutch device 50 includes a moving frame 54. The upper side of the moving frame 54 is fixedly connected to the output end of the translation drive device 40. The translation drive device 40 can be a conventional automation device such as a linear motor and a rodless cylinder, which will not be described in detail here. A cam member 55 driven by a servo motor 56 is provided in the moving frame 54. A first clutch connection block 51 for driving the first nozzle group 21 is provided on the right side of the cam member 55. A second clutch connection block 52 for driving the second nozzle group 22 is provided on the lower side of the cam member 55. A third clutch connection block 53 for driving the third nozzle group 23 is provided on the left side of the cam member 55. As shown in the attached Figure 3 As shown, the upper side of the cam member 55 is a vacant area 501 .

[0061] Combined with Figure 2 and attached Fig.12 As shown, one end of the first clutch connection block 51 is provided with a recessed platform portion 512 for contacting the cam member 55, and the other end of the first clutch connection block 51 is provided with a first plug portion 511. The movable frame 54 is provided with a first plug through hole 541 through which the first plug portion 511 passes. The first plug portion 511 is sleeved with a first compression spring 57. The two ends of the first compression spring 57 respectively contact the first clutch connection block 51 and the movable frame 54. The first nozzle group 21 is fixedly provided with a first connecting arm 211 for connecting with the first clutch connection block 51. The first connecting arm 211 is provided with a first plug hole 2111. When the cam member 55 pushes the first clutch connection block 51, the first plug portion 511 of the first clutch connection block 51 is inserted into the first plug hole 2111 of the first connecting arm 211, so that the clutch device 50 is connected to the first nozzle group 21.

[0062] The structures of the second clutch connection block 52 and the third clutch connection block 53 are the same as that of the first clutch connection block 51 .

[0063] Combined with Figure 2 and attached Fig.12 As shown, the second nozzle group 22 is arranged directly below the mobile frame 54, and a second bolt through hole 542 is opened at the mobile frame 54, through which the second bolt portion 521 of the second clutch connecting block 52 passes, and a second compression spring 58 is sleeved at the second bolt portion 521, and the two ends of the second compression spring 58 respectively conflict with the second clutch connecting block 52 and the mobile frame 54, and a second bolt hole 2211 is provided on the mobile mounting seat 221 of the second nozzle group 22. When the cam member 55 pushes the second clutch connecting block 52, the second bolt portion 521 of the second clutch connecting block 52 is inserted into the second bolt hole 2211 of the mobile mounting seat 221, so that the clutch device 50 is connected to the second nozzle group 22.

[0064] Combined with Figure 2 and attached Fig.12 As shown, a third bolt through hole 543 is provided at the movable frame 54, through which the third bolt portion 531 of the third clutch connecting block 53 passes. A third compression spring 59 is sleeved at the third bolt portion 531. The two ends of the third compression spring 59 respectively contact the third clutch connecting block 53 and the movable frame 54. The third nozzle group 23 is fixedly provided with a third connecting arm 231 for connecting with the third clutch connecting block 53. The third connecting arm 231 is provided with a third bolt hole 2311. When the cam member 55 pushes the third clutch connecting block 53, the third bolt portion 531 of the third clutch connecting block 53 is inserted into the third bolt hole 2311 of the third connecting arm 231, so that the clutch device 50 is connected to the third nozzle group 23.

[0065] A printing process method, based on the above transfer device, includes the following steps:

[0066] S1、Combined with Figure 3 and attached Fig.12 As shown, the cam member 55 in the movable frame 54 deflects 90° clockwise and pushes the first clutch connection block 51, and the first plug portion 511 of the first clutch connection block 51 is inserted into the first plug hole 2111 of the first connection arm 211, so that the clutch device 50 is connected to the first nozzle group 21, and then the translation drive device 40 drives the movable frame 54,

[0067] As attached Figure 4 As shown, the movable frame 54 drives the first nozzle group 21 of the printing assembly to perform a translational movement along the surface of the transfer roller 10 in the axial direction, and the first nozzle group 21 sprays UV varnish 61 on the surface of the transfer roller 10;

[0068] When the first nozzle group 21 finishes spraying UV varnish on the surface of the transfer roller 10, the translation drive device 40 drives the first nozzle group 21 back to the original path through the moving frame 54, so that the first nozzle group 21 is reset. After the first nozzle group 21 is reset, the cam member 55 is deflected and reset, and the first compression spring 57 recovers its elastic deformation and pushes the first clutch connection block 51 in the reverse direction to reset.

[0069] S2, as attached Figure 5 As shown, the transfer roller 10 rotates counterclockwise, so that the UV varnish sprayed in step S1 faces the first UV curing lamp 31, and the UV varnish sprayed in step S1 faces the first UV curing lamp 31. Figure 4 and attached Figure 5 As shown, the first UV curing lamp 31 performs light curing on the UV varnish 61 sprayed on the transfer roller 10 and forms a peelable layer 62;

[0070] S3, as attached Figure 6 As shown, the transfer roller 10 rotates counterclockwise, so that the peelable layer 62 formed in step S2 turns to the second nozzle group 22, the cam member 55 in the movable frame 54 deflects 180 degrees and pushes the second clutch connection block 52, and the second plug portion 521 of the second clutch connection block 52 is inserted into the movable mounting seat 221 of the second nozzle group 22, so that the clutch device 50 is connected to the second nozzle group 22, and then the translation driving device 40 drives the movable frame 54,

[0071] The movable frame 54 drives the second nozzle group 22 to perform a translational motion in the axial direction along the surface of the transfer roller 10 , and the second nozzle group 22 sprays the UV ink 63 on the peelable layer 62 ;

[0072] When the second nozzle group 22 finishes spraying the UV ink on the peelable layer, the translation drive device 40 drives the second nozzle group 22 to return to the original path through the moving frame 54, so that the second nozzle group 22 is reset. After the second nozzle group 22 is reset, the cam member 55 is deflected and reset, and the second compression spring 58 recovers its elastic deformation and pushes the second clutch connection block 52 in the reverse direction to reset.

[0073] S4, as attached Figure 7 As shown, the transfer roller 10 rotates counterclockwise, so that the UV ink 63 sprayed in step S3 faces the second UV curing lamp 32, and the second UV curing lamp 32 performs light curing on the UV ink 63 and forms an image layer 64 on the upper surface of the peelable layer 62;

[0074] S5, as attached Figure 8As shown, the transfer roller 10 rotates counterclockwise, so that the image layer 64 formed in step S4 turns to the third nozzle group 23, the cam member 55 in the movable frame 54 deflects 90° counterclockwise and pushes the third clutch connection block 53, and the third plug portion 531 of the third clutch connection block 53 is inserted into the third plug hole 2311 of the third connection arm 231, so that the clutch device 50 is connected to the third nozzle group 23, and then the translation driving device 40 drives the movable frame 54,

[0075] The movable frame 54 drives the third nozzle group 23 to perform a translational movement in the axial direction along the surface of the transfer roller 10 , and the third nozzle group 23 sprays the UV light curing glue 65 on the image layer 64 ;

[0076] When the third nozzle group 23 finishes spraying the UV light curing glue 65 on the image layer 64, the translation driving device 40 drives the third nozzle group 23 to return to the original path through the moving frame 54, so that the third nozzle group 23 is reset. After the third nozzle group 23 is reset, the cam member 55 is deflected and reset, and the third compression spring 59 recovers its elastic deformation and pushes the third clutch connection block 53 in the reverse direction to reset.

[0077] S6, as attached Fig. 9 As shown, the transfer roller 10 rotates counterclockwise, so that the UV light curing glue 65 sprayed in step S5 faces the third UV curing lamp 33, and the third UV curing lamp 33 performs the first curing on the UV light curing glue 65 and makes it highly viscous, and the UV light curing glue 65 forms a transfer adhesive layer 66 on the upper surface of the image layer; because the third UV curing lamp 33 is specifically an LED UV lamp, the third UV curing lamp 33 can produce a photocuring initiation effect on the long-wave initiator in the UV light curing glue 65, so that the UV light curing glue 65 is cured for the first time, so that it is highly viscous, and at this time the viscosity of the transfer adhesive layer 66 is about 5000 ripoise;

[0078] S7, as attached Fig.10 As shown, the transfer roller 10 rotates counterclockwise, and the embossing roller 11 presses the printing substrate and the transfer roller tightly together, and the adhesive layer and the printing substrate form a high bonding force, overcoming the low bonding force between the peelable layer and the surface of the transfer roller, and the peelable layer 62, the image layer 64, and the transfer adhesive layer 66 overlapped in sequence are transferred to the printing substrate 70. At this time, the transfer adhesive layer 66 is located at the bottom layer on the surface of the printing substrate 70, and the peelable layer 62 is located at the top layer on the surface of the printing substrate 70.

[0079] S8, as attached Fig.11As shown, the printing substrate 70 is transported to the fourth UV curing lamp 34 for illumination, so that the highly viscous transfer adhesive layer 66 is completely cured, and the printing substrate and the image layer are firmly bonded, thereby completing the transfer. Since the fourth UV curing lamp 34 is specifically a mercury lamp, the fourth UV curing lamp 34 can produce a photocuring initiation effect on the short-wave initiator in the UV light curing glue 65, so that the highly viscous UV light curing glue 65 is completely cured.

[0080] The formula of UV light curing adhesive includes the following raw materials in weight percentage: 30-43% monomer A, 30-40% monomer B, 1-5% long-wave initiator, 5-15% short-wave initiator, 3-8% auxiliary agent, and 5-15% resin. The light curing adhesive can form a colloid of corresponding viscosity under long-wave UV curing according to the adjustment of the formula ratio, and then achieve complete curing under short-wave UV curing. Monomer A and monomer B can be monofunctional, such as IBOA, TMCHA, CTFA, THF, etc., or difunctional or polyfunctional, such as HDDA, TPGDA, NPGDA, DPGDA, TMPHTA, DPHA, etc. The resin can be a prepolymer containing acrylic acid groups such as epoxy polyester and polyurethane. The auxiliary agent can be a silicone or non-silicon defoamer, leveling agent, etc. The long-wave initiator can be TPO, TPO-L, TMO, 369, 907, etc. or their macromolecular derivatives. The short wave initiator can be BP, 1173, 184, etc. and their derivatives or macromolecular derivatives.

[0081] Specific embodiment three: A transfer device, comprising a rotatably arranged transfer roller 10, a printing assembly suspended above the circumference of the transfer roller 10, a embossing roller 11 below the circumference of the transfer roller 10, the printing assembly comprising a first nozzle group 21 for printing UV varnish, a second nozzle group 22 for printing UV ink, and a third nozzle group 23 for printing UV light curing glue, the second nozzle group 22 is arranged between the first nozzle group 21 and the third nozzle group 23, and the second nozzle group 22 can be movable or fixed;

[0082] A third UV curing lamp 33 is provided at the third nozzle group 23, and the third UV curing lamp 33 is used to perform the first curing of the sprayed UV light curing glue and make it highly viscous. A fourth UV curing lamp 34 is provided along the output direction after the printing substrate is pressed, and the fourth UV curing lamp 34 is used to completely cure the UV light curing glue transferred to the printing substrate. The third UV curing lamp 33 is an LED UV lamp, and the fourth UV curing lamp 34 is a mercury lamp.

[0083] A printing process method, characterized in that: the above-mentioned transfer device includes the following steps:

[0084] S1, the first nozzle group 21 sprays UV varnish on the surface of the transfer roller 10;

[0085] S2, the transfer roller 10 rotates counterclockwise, so that the UV varnish formed in step S2 is directed toward the second nozzle group 22, and the second nozzle group 22 sprays UV ink at the UV varnish;

[0086] S3, the transfer roller 10 rotates counterclockwise, so that the UV ink sprayed in step S2 is directed toward the third nozzle group 23, and the third nozzle group 23 sprays UV light-curing glue on the UV ink;

[0087] S4, the transfer roller 10 rotates counterclockwise, so that the UV light curing glue sprayed in step S3 faces the third UV curing lamp 33, and the third UV curing lamp 33 irradiates the UV varnish, UV ink, and UV light curing glue at the same time, and the UV varnish and UV ink are cured at the same time, and the UV light curing glue is cured for the first time and becomes highly viscous and forms a transfer adhesive layer;

[0088] S5, the transfer roller 10 rotates counterclockwise, and the embossing roller 11 presses the printing substrate and the transfer roller tightly together, so that the adhesive layer and the printing substrate form a high bonding force, overcoming the low bonding force between the peelable layer and the surface of the transfer roller, and the transfer adhesive layer is transferred to the printing substrate together with the cured UV varnish and UV ink;

[0089] S6. The printing substrate is transported to the fourth UV curing lamp 34 for illumination, so that the highly viscous transfer adhesive layer is completely cured, and the printing substrate and the image layer are firmly bonded, thereby completing the transfer.

[0090] The formula of UV light curing glue includes the following raw materials in weight percentage: The formula of UV light curing glue includes the following raw materials in weight percentage: 30-43% monomer A, 30-40% monomer B, 1-5% long-wave initiator, 5-15% short-wave initiator, 3-8% auxiliary agent, and 5-15% resin. The light curing glue can form a colloid of corresponding viscosity under long-wave UV curing according to the adjustment of the formula ratio, and then achieve complete curing under short-wave UV curing. Monomer A and monomer B can be monofunctional, such as IBOA, TMCHA, CTFA, THF, etc., or difunctional or polyfunctional, such as HDDA, TPGDA, NPGDA, DPGDA, TMPHTA, DPHA, etc. The resin can be a prepolymer containing acrylic acid groups such as epoxy polyester and polyurethane. The auxiliary agent can be a silicone or non-silicon defoamer, leveling agent, etc. The long-wave initiator can be TPO, TPO-L, TMO, 369, 907, etc. or their macromolecular derivatives. The short wave initiator can be BP, 1173, 184, etc. and their derivatives or macromolecular derivatives.

[0091] Specific embodiment 4: A transfer device, comprising a transfer roller 10 that is rotatably arranged, a printing assembly is suspended above the circumference of the transfer roller 10, a pressing roller 11 is arranged below the circumference of the transfer roller 10, the printing assembly comprises a first nozzle group 21 for printing UV varnish, a second nozzle group 22 for printing UV ink, and a third nozzle group 23 for printing UV light curing glue, the second nozzle group 22 is arranged between the first nozzle group 21 and the third nozzle group 23, and the second nozzle group 22 can be movable or fixed;

[0092] The second nozzle group 22 specifically includes a plurality of rows of nozzles for printing different colors, each row of nozzles corresponding to one color, such as CMYK+white;

[0093] A third UV curing lamp 33 is provided at the third nozzle group 23, and the third UV curing lamp 33 is used to perform the first curing of the sprayed UV light curing glue and make it highly viscous. A fourth UV curing lamp 34 is provided along the output direction after the printing substrate is pressed, and the fourth UV curing lamp 34 is used to completely cure the UV light curing glue transferred to the printing substrate. The third UV curing lamp 33 is an LED UV lamp, and the fourth UV curing lamp 34 is a mercury lamp.

[0094] A printing process method, characterized in that: the above-mentioned transfer device includes the following steps:

[0095] S1, the first nozzle group 21 sprays UV varnish on the surface of the transfer roller 10;

[0096] S2, the transfer roller 10 rotates counterclockwise, so that the UV varnish formed in step S2 faces the second nozzle group 22, and the second nozzle group 22 sprays UV ink at the UV varnish; each row of nozzles at the second nozzle group 22 prints different colors and together form a corresponding printing pattern;

[0097] S3, the transfer roller 10 rotates counterclockwise, so that the UV ink sprayed in step S2 is directed toward the third nozzle group 23, and the third nozzle group 23 sprays UV light-curing glue on the UV ink;

[0098] S4, the transfer roller 10 rotates counterclockwise, so that the UV light curing glue sprayed in step S3 faces the third UV curing lamp 33, and the third UV curing lamp 33 irradiates the UV varnish, UV ink, and UV light curing glue at the same time, and the UV varnish and UV ink are cured at the same time, and the UV light curing glue is cured for the first time and becomes highly viscous and forms a transfer adhesive layer;

[0099] S5, the transfer roller 10 rotates counterclockwise, and the embossing roller 11 presses the printing substrate and the transfer roller tightly together, so that the adhesive layer and the printing substrate form a high bonding force, overcoming the low bonding force between the peelable layer and the surface of the transfer roller, and the transfer adhesive layer is transferred to the printing substrate together with the cured UV varnish and UV ink;

[0100] S6. The printing substrate is transported to the fourth UV curing lamp 34 for illumination, so that the highly viscous transfer adhesive layer is completely cured, and the printing substrate and the image layer are firmly bonded, thereby completing the transfer.

[0101] The formula of UV light curing glue includes the following raw materials in weight percentage: The formula of UV light curing glue includes the following raw materials in weight percentage: 30-43% monomer A, 30-40% monomer B, 1-5% long-wave initiator, 5-15% short-wave initiator, 3-8% auxiliary agent, and 5-15% resin. The light curing glue can form a colloid of corresponding viscosity under long-wave UV curing according to the adjustment of the formula ratio, and then achieve complete curing under short-wave UV curing. Monomer A and monomer B can be monofunctional, such as IBOA, TMCHA, CTFA, THF, etc., or difunctional or polyfunctional, such as HDDA, TPGDA, NPGDA, DPGDA, TMPHTA, DPHA, etc. The resin can be a prepolymer containing acrylic acid groups such as epoxy polyester and polyurethane. The auxiliary agent can be a silicone or non-silicon defoamer, leveling agent, etc. The long-wave initiator can be TPO, TPO-L, TMO, 369, 907, etc. or their macromolecular derivatives. The short wave initiator can be BP, 1173, 184, etc. and their derivatives or macromolecular derivatives.

[0102] Specific embodiment 5: A transfer device, comprising a transfer roller 10 that is rotatably arranged, a printing assembly is suspended above the circumference of the transfer roller 10, a pressing roller 11 is arranged below the circumference of the transfer roller 10, the printing assembly comprises a first nozzle group 21 for printing UV varnish, a second nozzle group 22 for printing UV ink, and a third nozzle group 23 for printing UV light curing glue, the second nozzle group 22 is arranged between the first nozzle group 21 and the third nozzle group 23, and the second nozzle group 22 can be movable or fixed;

[0103] The second nozzle group 22 specifically includes a plurality of rows of nozzles for printing different colors, each row of nozzles corresponds to one color, such as CMYK+white, and each row of nozzles is correspondingly provided with an LED UV lamp for inter-printing curing;

[0104] A third UV curing lamp 33 is provided at the third nozzle group 23, and the third UV curing lamp 33 is used to perform the first curing of the sprayed UV light curing glue and make it highly viscous. A fourth UV curing lamp 34 is provided along the output direction after the printing substrate is pressed, and the fourth UV curing lamp 34 is used to completely cure the UV light curing glue transferred to the printing substrate. The third UV curing lamp 33 is an LED UV lamp, and the fourth UV curing lamp 34 is a mercury lamp.

[0105] A printing process method, characterized in that: the above-mentioned transfer device includes the following steps:

[0106] S1, the first nozzle group 21 sprays UV varnish on the surface of the transfer roller 10;

[0107] S2, the transfer roller 10 rotates counterclockwise, so that the UV varnish formed in step S2 faces the second nozzle group 22, and the second nozzle group 22 sprays UV ink at the UV varnish; each row of nozzles at the second nozzle group 22 prints different colors and forms a corresponding printing pattern together, and when each row of nozzles completes printing, the corresponding inter-press pre-curing LED UV lamp is turned on to cure the printed color;

[0108] S3, the transfer roller 10 rotates counterclockwise, so that the UV ink sprayed in step S2 is directed toward the third nozzle group 23, and the third nozzle group 23 sprays UV light-curing glue on the UV ink;

[0109] S4, the transfer roller 10 rotates counterclockwise, so that the UV light curing glue sprayed in step S3 faces the third UV curing lamp 33, and the third UV curing lamp 33 irradiates the UV varnish, UV ink, and UV light curing glue at the same time, and the UV varnish and UV ink are cured at the same time, and the UV light curing glue is cured for the first time and becomes highly viscous and forms a transfer adhesive layer;

[0110] S5, the transfer roller 10 rotates counterclockwise, and the embossing roller 11 presses the printing substrate and the transfer roller tightly together, so that the adhesive layer and the printing substrate form a high bonding force, overcoming the low bonding force between the peelable layer and the surface of the transfer roller, and the transfer adhesive layer is transferred to the printing substrate together with the cured UV varnish and UV ink;

[0111] S6. The printing substrate is transported to the fourth UV curing lamp 34 for illumination, so that the highly viscous transfer adhesive layer is completely cured, and the printing substrate and the image layer are firmly bonded, thereby completing the transfer.

[0112] The formula of UV light curing glue includes the following raw materials in weight percentage: The formula of UV light curing glue includes the following raw materials in weight percentage: 30-43% monomer A, 30-40% monomer B, 1-5% long-wave initiator, 5-15% short-wave initiator, 3-8% auxiliary agent, and 5-15% resin. The light curing glue can form a colloid of corresponding viscosity under long-wave UV curing according to the adjustment of the formula ratio, and then achieve complete curing under short-wave UV curing. Monomer A and monomer B can be monofunctional, such as IBOA, TMCHA, CTFA, THF, etc., or difunctional or polyfunctional, such as HDDA, TPGDA, NPGDA, DPGDA, TMPHTA, DPHA, etc. The resin can be a prepolymer containing acrylic acid groups such as epoxy polyester and polyurethane. The auxiliary agent can be a silicone or non-silicon defoamer, leveling agent, etc. The long-wave initiator can be TPO, TPO-L, TMO, 369, 907, etc. or their macromolecular derivatives. The short wave initiator can be BP, 1173, 184, etc. and their derivatives or macromolecular derivatives.

[0113] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0114] It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0115] The above description does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A transfer device, comprising a transfer roller (10) arranged to rotate, characterized in that: A printing assembly is suspended above the circumference of the transfer roller (10), and a embossing roller (11) is provided below the circumference of the transfer roller (10). The printing assembly comprises a first nozzle group (21) for printing UV varnish, a second nozzle group (22) for printing UV ink, and a third nozzle group (23) for printing UV light-curing adhesive. The second nozzle group (22) is arranged between the first nozzle group (21) and the third nozzle group (23). A first UV curing lamp (31) for curing the sprayed UV varnish to form a peelable layer is provided between the first nozzle group (21) and the second nozzle group (22); a second UV curing lamp (32) for curing the sprayed UV ink is provided between the second nozzle group (22) and the third nozzle group (23); the third nozzle group (23) is provided between the second UV curing lamp (32) and the third UV curing lamp (33); the third UV curing lamp (33) is used to perform a first curing on the sprayed UV light curing glue and make it highly viscous; a fourth UV curing lamp (34) is provided along the output direction after the printing substrate is pressed; the fourth UV curing lamp (34) is used to completely cure the UV light curing glue transferred onto the printing substrate; It also comprises a translation driving device (40) and a clutch device (50), wherein the clutch device (50) comprises a moving frame (54), the upper side of the moving frame (54) being fixedly connected to the output end of the translation driving device (40), a cam member (55) for being driven by a servo motor (56) being arranged in the moving frame (54), a first clutch connection block (51) for driving the first nozzle group (21) being arranged on the right side of the cam member (55), a second clutch connection block (52) for driving the second nozzle group (22) being arranged on the lower side of the cam member (55), a third clutch connection block (53) for driving the third nozzle group (23) being arranged on the left side of the cam member (55), and an upper side of the cam member (55) being a vacant area (501); One end of the first clutch connection block (51) is provided with a concave platform portion (512) for contacting the cam member (55); the other end of the first clutch connection block (51) is provided with a first plug portion (511); the movable frame (54) is provided with a first plug through hole (541) through which the first plug portion (511) passes; the first plug portion (511) is sleeved with a first compression spring (57); the two ends of the first compression spring (57) respectively contact the first clutch connection block (51) and the movable frame (54). The first nozzle group (21) is fixedly provided with a first connecting arm (211) for connecting with the first clutch connecting block (51), and the first connecting arm (211) is provided with a first bolt hole (2111). When the cam member (55) pushes the first clutch connecting block (51), the first bolt portion (511) of the first clutch connecting block (51) is inserted into the first bolt hole (2111) of the first connecting arm (211), so that the clutch device (50) is connected to the first nozzle group (21); The structures of the second clutch connection block (52) and the third clutch connection block (53) are the same as the structure of the first clutch connection block (51).

2. A transfer device according to claim 1, characterized in that: The first UV curing lamp (31), the second UV curing lamp (32), and the third UV curing lamp (33) are all LED UV lamps, and the fourth UV curing lamp (34) is a mercury lamp.

3. A transfer device according to claim 1, characterized in that: The transfer roller (10) comprises a roller inner frame and a roller panel detachably mounted on the roller inner frame, wherein the roller panel covers the outer cylindrical surface of the roller inner frame.

4. A printing process, characterized in that: The transfer device according to claim 1 comprises the following steps: S1, the first nozzle group (21) sprays UV varnish on the surface of the transfer roller (10); S2, the transfer roller (10) rotates counterclockwise so that the UV varnish sprayed in step S1 faces the first UV curing lamp (31), and the first UV curing lamp (31) performs light curing on the UV varnish sprayed on the transfer roller (10) to form a peelable layer; S3, the transfer roller (10) rotates counterclockwise to make the peelable layer formed in step S2 turn to the second nozzle group (22), and the second nozzle group (22) sprays UV ink on the peelable layer; S4, the transfer roller (10) rotates counterclockwise so that the UV ink sprayed in step S3 faces the second UV curing lamp (32), and the second UV curing lamp (32) performs light curing on the UV ink and forms an image layer on the upper surface of the peelable layer; S5, the transfer roller (10) rotates counterclockwise to make the image layer formed in step S4 turn to the third nozzle group (23), and the third nozzle group (23) sprays UV light curing glue on the image layer; S6, the transfer roller (10) rotates counterclockwise so that the UV light-curing adhesive sprayed in step S5 faces the third UV curing lamp (33), the third UV curing lamp (33) performs a first curing on the UV light-curing adhesive and makes it highly viscous, and the UV light-curing adhesive forms a transfer adhesive layer on the upper surface of the image layer; S7, the transfer roller (10) rotates counterclockwise to transfer the sequentially overlapping peelable layer, image layer, and transfer adhesive layer to the printing substrate, wherein the transfer adhesive layer is located at the bottom layer on the surface of the printing substrate, and the peelable layer is located at the top layer on the surface of the printing substrate; S8, the printing substrate is transported to the fourth UV curing lamp (34) for illumination, so that the highly viscous transfer adhesive layer is completely cured, thereby completing the transfer.

5. The printing process according to claim 4, characterized in that: The formula of the UV light curing adhesive includes the following raw materials in weight percentage: 30-43% of monomer A, 30-40% of monomer B, 1-5% of long-wave initiator, 5-15% of short-wave initiator, 3-8% of auxiliary agent, and 5-15% of resin.

6. The printing process according to claim 5, characterized in that: In step S1, the cam member (55) in the movable frame (54) deflects 90 degrees clockwise and pushes the first clutch connection block (51), and the first plug portion (511) of the first clutch connection block (51) is inserted into the first plug hole (2111) of the first connection arm (211), so that the clutch device (50) is connected to the first nozzle group (21), and then the translation drive device (40) drives the movable frame (54), and the movable frame (54) drives the first nozzle group (21) along the transfer printing direction. The surface of the roller (10) performs synchronous translational motion in the axial direction. When the first nozzle group (21) completes spraying UV varnish on the surface of the transfer roller (10), the translational drive device (40) drives the first nozzle group (21) to return to the original path through the moving frame (54) to reset the first nozzle group (21). After the first nozzle group (21) is reset, the cam member (55) deflects and resets, and the first compression spring (57) recovers its elastic deformation and pushes the first clutch connection block (51) in the reverse direction to reset. In step S3, the cam member (55) in the movable frame (54) deflects 180 degrees and pushes the second clutch connection block (52), and the second plug portion (521) of the second clutch connection block (52) is inserted into the movable mounting seat (221) of the second nozzle group (22), so that the clutch device (50) is connected to the second nozzle group (22), and then the translation drive device (40) drives the movable frame (54), and the movable frame (54) drives the second nozzle group (22) along the rotation direction. The surface of the printing cylinder (10) performs synchronous translational motion in the axial direction. When the second nozzle group (22) finishes spraying UV ink on the peelable layer, the translational drive device (40) drives the second nozzle group (22) to return to the original path through the moving frame (54) so ​​that the second nozzle group (22) is reset. After the second nozzle group (22) is reset, the cam member (55) is deflected and reset, and the second compression spring (58) recovers its elastic deformation and pushes the second clutch connection block (52) in the reverse direction to reset. In step S5, the cam member (55) in the movable frame (54) is deflected 90 degrees counterclockwise and pushes the third clutch connection block (53), and the third plug portion (531) of the third clutch connection block (53) is inserted into the third plug hole (2311) of the third connection arm (231), so that the clutch device (50) is connected to the third nozzle group (23), and then the translation drive device (40) drives the movable frame (54), and the movable frame (54) drives the third nozzle group (23). The transfer roller (10) performs synchronous translational motion in the axial direction along the surface of the transfer roller (10). When the third nozzle group (23) completes spraying the UV light-curing adhesive at the image layer, the translational drive device (40) drives the third nozzle group (23) to return to the original path through the movable frame (54) to reset the third nozzle group (23). After the third nozzle group (23) is reset, the cam member (55) is deflected and reset, and the third compression spring (59) recovers its elastic deformation and pushes the third clutch connection block (53) in the reverse direction to reset.

Images