Laser film rapid printing device and printing method thereof

Abstract

The invention discloses a laser film rapid printing device and a printing method thereof, belonging to the technical field of laser film printing, comprising a machine body and a cooling unit installed in the machine body, the cooling unit comprising a cooling plate for cooling, a transfer unit installed in the machine body through a mounting plate, the transfer unit comprising an upper roller and a lower roller, the upper roller and the lower roller are respectively equipped with a transfer film and a laser film, and a partial hot pressing unit is installed on the inner wall of the machine body; by providing the partial hot pressing unit and the flattening unit, pressure is applied to the transfer film through the flattening piece at the front end during the heating process, thereby adjusting the tension, keeping the transfer film in a taut state during the heating process, thereby enabling it to fully contact with the heated portion of the upper belt body, and simultaneously adjusting the tension of the laser film during swinging, thereby enabling the heated transfer film to fully contact with the laser film during the hot pressing process, thereby reducing the generation of bubbles.

Description

Technical Field

[0001] The invention relates to the technical field of laser film printing, and in particular to a laser film rapid printing device and a printing method thereof. Background Art

[0002] Laser film is a material that uses laser technology to form an optical film on the surface of the film. It has optical properties such as anti-reflection, reflection, and polarization.

[0003] When printing on laser film, transfer film is mostly used for transfer. The transfer process is to transfer the pattern or text on the transfer film to the surface of the laser film through heat pressing or other methods. During the transfer process, the transfer film is heated and pressurized to peel off the pattern or effect layer of the film and attach it to the laser film, thereby realizing the transfer printing of the pattern.

[0004] During the transfer process, due to the long length of the film, its tension is difficult to be effectively guaranteed, which will result in the transfer film being unable to fully contact the heating element during the heating stage. As a result, there will be insufficient contact between the transfer film and the laser film during the hot pressing process. This situation can easily lead to the generation of bubbles, which will not only reduce the visual effect of the transfer, but also have an adverse effect on the overall quality of the transfer. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of bubbles appearing during the hot pressing process and to propose a laser film rapid printing device and a printing method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A laser film rapid printing device comprises a machine body and a cooling unit installed in the machine body, the cooling unit comprises a cooling plate for cooling, a transfer unit is installed in the machine body through a mounting plate, the transfer unit comprises an upper roller and a lower roller, a transfer film and a laser film are installed on the upper roller and the lower roller respectively, a sub-section hot pressing unit is installed on the inner wall of the machine body, and the sub-section hot pressing unit is connected to a flattening unit through a lower mounting frame; The partial hot pressing unit comprises an upper mounting frame, an upper transmission roller is mounted on the top of the inner side of the upper mounting frame, a heating roller is mounted on the top of the inner side of the lower mounting frame, an upper belt body is sleeved on the upper transmission roller and the heating roller, a tensioning roller for abutting against the upper belt body is mounted on the inner side of the upper mounting frame, one end of the tensioning roller is connected to a motor, and a supporting belt body is mounted on the lower mounting frame through the lower transmission roller; The flattening unit includes a central axis, which is connected to a tensioning roller through a transmission member, and one end of the central axis is connected to a flattening member that can swing left and right, and one side of the flattening member is provided with a track member for guiding it to extend and retract during the swinging process, so that after the upper belt body heated by the front heating roller evenly heats the transfer film and is pressed with the laser film, the bubbles generated in the transfer process can be driven out from the edge under the action of the flattening member that swings back and forth and retracts to both sides.

[0007] As a further description of the above technical solution: The flattening piece includes a lower cross frame fixed on a lower mounting frame, a connecting shaft is rotatably connected to the lower cross frame, a fixed rod is fixed to the bottom end of the connecting shaft, a moving rod is slidably sleeved on the outer surface of the fixed rod, a second spring is installed in the fixed rod by opening a long groove, and one end of the second spring is connected to the inner wall of the moving rod.

[0008] As a further description of the above technical solution: A swing rod is fixed on the top of the connecting shaft, a driving column is inserted through a strip groove on the swing rod, a driving rod is fixed on the top of the driving column, and the bottom end of the central axis is fixed at the center of the driving rod.

[0009] As a further description of the above technical solution: The tensioning roller includes a roller body rotatably connected to the upper mounting frame, a plurality of annular grooves are provided on the roller body, an arc-surface protrusion is inserted into the bottom wall of the annular groove through a slot, a screw is rotatably connected to the middle part of the top wall of the annular groove through a countersunk hole, and the arc-surface protrusion is threadedly sleeved on the outer surface of the screw.

[0010] As a further description of the above technical solution: The leveling unit also includes an intermittent pressure unit; The intermittent pressure unit includes a cross frame with a tube fixed on the inner side of the upper mounting frame, a vertical rod is inserted into the cross frame with a tube, a top seat in contact with the arc-surface protrusion is fixed to the top of the vertical rod, a rolling shaft is assembled on the bottom end of the vertical rod through a U-shape, and a first spring is assembled on the cross frame with a tube through a first shock-absorbing pad, and one end of the first spring is connected to the vertical rod.

[0011] As a further description of the above technical solution: The leveling unit also includes an upper crossbar, which is mounted on a lower mounting frame, and the central axis is rotatably connected to the crossbar.

[0012] As a further description of the above technical solution: The transmission member comprises a linkage shaft, a bearing seat is sleeved on the linkage shaft, two bearing seats are respectively fixed to the upper mounting frame and the lower mounting frame, the top end of the linkage shaft and one end of the roller body passing through the upper mounting frame are both fixed with bevel gears, and the two bevel gears are meshed; A double-groove pulley and a single-groove pulley are fixed to the outer surface of the linkage shaft and the top end of the middle shaft respectively, and the double-groove pulley is connected with two single-groove pulleys through two synchronous belts.

[0013] As a further description of the above technical solution: The partial hot pressing unit also includes a supporting transverse plate, which is fixed to the inner side of the lower mounting frame so as to support the upper part of the supporting belt body.

[0014] As a further description of the above technical solution: The cooling unit also includes a support frame, the cooling plate is assembled on the inner side of the support frame, and a channel groove is reserved between the two cooling plates for the transfer film and the laser film to pass through after the film is combined. The transfer film and the laser film are guided to the outside of the machine body after passing through the channel groove.

[0015] A laser film rapid printing method comprises the following steps: S1. First, one end of the transfer film and the laser film is guided to the outside of the machine body after passing through the partial hot pressing unit, the flattening unit and the cooling unit to complete the film installation; S2. After the installation is completed, the motor is started to drive the tension roller and the upper transmission roller to rotate, so that the upper belt body is cyclically rotated, the upper belt body and the heating roller at the front end are heated, and then the heat is transferred to the transfer film guided thereunder, the transfer film is heated, and at the same time, the transfer film is pressed by the heating roller to make the transfer film and the laser film fit together, so that the surface pattern is transferred to the surface of the laser film; S3. During the heating process at the front end, the flattening piece on one side of the heating roller at the front end swings left and right under the drive of the transmission piece, slightly pressing the transfer film to adjust its tension, which helps to keep the transfer film taut, so that it is more stable during the heating and transfer process. At the same time, the flattening piece can also apply a certain pressure to the transfer film, which helps to make the transfer film and the laser film fit together more closely and improve the transfer effect; S4, when the combined transfer film and laser film continue to move, the roller shaft that reciprocates up and down first applies pressure to the transferred film body intermittently to disperse the bubbles generated during the transfer process, and then the flattening piece that reciprocates at the rear end drives the bubbles out from both sides and enables the combined film body to remain tightly fitted; S5. Then, in the process of continuing to move, the contact part of the upper belt with the heating roller at the rear end is heated, and then the heat is transferred to the transfer film that has been laminated and guided to the bottom, and the transfer film is heated again. At the same time, it is rolled by the heating roller to ensure the integrity of the transfer and improve the transfer effect. Finally, the film body is cooled by the cooling plate.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By setting up the partial hot pressing unit and the flattening unit, it is realized that during the heating process, the flattening piece at the front end is used to apply pressure to the transfer film, thereby adjusting the tension, so that the transfer film is kept taut during the heating process, so that it can fully contact with the heated part of the upper belt body, and the upper belt body circulates to indirectly heat the transfer film, which is more uniform than direct contact heating, and can effectively control the heating temperature to avoid overheating and damage to the transfer film. At the same time, the tension of the laser film can also be adjusted during the swing, so that the heated transfer film can fully contact with the laser film during the hot pressing process, thereby reducing the generation of bubbles; At the same time, the rolling shaft in the middle position can intermittently apply pressure to the transferred film, so that the bubbles generated during the transfer process are dispersed, and the bubbles are discharged from the edge through the flattening piece at the rear. When used in combination, the transfer effect and the overall quality of the transfer are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structural installation of a central axis provided according to an embodiment of the present invention is shown; Figure 3 It shows a schematic structural diagram of a flattening member provided in an embodiment of the present invention after being partially cut away; Figure 4 It shows a schematic diagram of a partially cutaway structure of an intermittent pressure-applying unit provided in an embodiment of the present invention; Figure 5 A schematic diagram of the structure of the interior of a machine body provided in an embodiment of the present invention is shown; Figure 6 It shows a schematic structural diagram of a partially cut-away upper belt body according to an embodiment of the present invention; Figure 7 A schematic diagram of a planar structure provided according to an embodiment of the present invention is shown; Figure 8 It shows a schematic diagram of the overall structure of a partial hot pressing unit provided according to an embodiment of the present invention; Fig. 9 The embodiment of the present invention provides Figure 3 The enlarged view of point A in the middle; Fig.10 The embodiment of the present invention provides Figure 4 Enlarged view of point B in the middle.

[0018] Legend: 10. Body; 20. Cooling unit; 21. Cooling plate; 22. Support frame; 30. Transfer unit; 31. Upper roller; 32. Lower roller; 33. Transfer film; 34. Laser film; 40. Divisional hot pressing unit; 41. Upper mounting frame; 42. Lower mounting frame; 43. Upper transmission roller; 44. Heating roller; 45. Upper belt body; 46. Tensioning roller; 461. Roller body; 462. Arc surface convex block; 463. Screw; 47. Motor; 48. Lower transmission roller; 49. Support belt body; 410. Support cross plate; 50. Smoothing unit; 51. Crossbar; 52. Middle axis; 53. Intermittent pressure unit; 531. Crossbar with tube; 532. Vertical bar; 533. Top support; 534. Rolling shaft; 535. First spring; 54. Smoothing member; 541. Lower crossbar; 542. Fixed bar; 543. Moving bar; 544. Second spring; 545. Swing bar; 546. Strip groove; 547. Driving column; 548. Driving rod; 55. Track member; 60. Transmission part; 61. Linkage shaft; 62. Bevel gear; 63. Double-groove pulley; 64. Synchronous belt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 - Fig.10 As shown, the present invention provides: A laser film rapid printing device includes a body 10 and a cooling unit 20 installed in the body 10, the cooling unit 20 includes a cooling plate 21 for cooling, a transfer unit 30 is installed in the body 10 through a mounting plate, the transfer unit 30 includes an upper roller 31 and a lower roller 32, a transfer film 33 and a laser film 34 are respectively installed on the upper roller 31 and the lower roller 32, a partial hot pressing unit 40 is installed on the inner wall of the body 10, and the partial hot pressing unit 40 is connected to a flattening unit 50 through a lower mounting frame 42.

[0021] like Figure 5 , Figure 6, Figure 7 and Figure 8 As shown, the partial hot pressing unit 40 includes an upper mounting frame 41, an upper transmission roller 43 is mounted on the top of the inner side of the upper mounting frame 41, a heating roller 44 is mounted on the top of the inner side of the lower mounting frame 42, an upper belt body 45 is sleeved on the upper transmission roller 43 and the heating roller 44, a tensioning roller 46 for resisting the upper belt body 45 is mounted on the inner side of the upper mounting frame 41, one end of the tensioning roller 46 is connected to a motor 47, a support belt body 49 is mounted on the lower mounting frame 42 through a lower transmission roller 48, preferably, the lower transmission roller 48 is an electric roller shaft, and the partial hot pressing unit 40 also includes a support cross plate 410, which is fixed to the inner side of the lower mounting frame 42 so that the upper part of the support belt body 49 is supported; Specifically, the supporting transverse plate 410 can always support the portion that rotates upward during the rotation of the supporting belt body 49 to ensure that it will not sink downward after being subjected to force.

[0022] like Figure 4 , Figure 6 and Fig.10 As shown, the tensioning roller 46 includes a roller body 461 rotatably connected to the upper mounting frame 41. Preferably, one end of the roller body 461 and one end of one of the upper transmission rollers 43 are fixedly sleeved with a pulley, and a belt is sleeved on the pulley. When the roller body 461 rotates, the upper transmission roller 43 can be driven to rotate together through the belt. Specifically, during the hot pressing process, the roller body 461 is driven to rotate by the motor 47, and the upper transmission roller 43 can be driven to rotate together by the belt, so that the upper belt body 45 rotates so that its surface is not in continuous contact with the heating roller 44, which can conduct heat and avoid overheating and damage to the film.

[0023] like Figure 5 and Figure 6 As shown, the leveling unit 50 includes a central axis 52, which is connected to the tensioning roller 46 through a transmission member 60. The leveling unit 50 also includes an upper cross bar 51, which is installed on the lower mounting frame 42. The central axis 52 is rotatably connected to the cross bar 51. One end of the central axis 52 is connected to a leveling piece 54 that can swing left and right. One side of the leveling piece 54 is provided with a track piece 55 for guiding it to extend and retract during the swinging process, so that the upper belt body 45 heated by the front heating roller 44 can heat the transfer film 33 evenly and imprint it with the laser film 34. Under the action of the leveling piece 54 that swings back and forth and retracts to both sides, the bubbles generated in the transfer process can be driven out from the edge.

[0024] like Figure 2 , Figure 3 , Figure 6 and Fig. 9As shown, the leveling member 54 includes a lower cross frame 541 fixed on the lower mounting frame 42, and a connecting shaft is rotatably connected to the lower cross frame 541, and a fixed rod 542 is fixed to the bottom end of the connecting shaft, and a moving rod 543 is slidably sleeved on the outer surface of the fixed rod 542. The lower surfaces of the track member 55, the fixed rod 542 and the moving rod 543 are in contact with the surface of the transfer film 33. A second spring 544 is installed in the fixed rod 542 by opening a long groove, and one end of the second spring 544 is connected to the inner wall of the moving rod 543. It is worth noting that the second spring 544 is in a compressed state in the contracted state, and a swing rod 545 is fixed to the top end of the connecting shaft, and a driving column 547 is inserted into the swing rod 545 by opening a strip groove 546. A driving rod 548 is fixed to the top end of the driving column 547, and the bottom end of the central axis 52 is fixed to the center of the driving rod 548. The transmission member 60 includes a linkage shaft 61, on which a bearing seat is sleeved, and two bearing seats are fixed to the upper mounting frame 41 and the lower mounting frame 42 respectively. The top end of the linkage shaft 61 and the end of the roller body 461 that passes through the upper mounting frame 41 are both fixed with a bevel gear 62, and the two bevel gears 62 are meshed. The outer surface of the linkage shaft 61 and the top end of the middle shaft 52 are respectively fixed with a double-groove pulley 63 and a single-groove pulley, and the double-groove pulley 63 is connected to the two single-groove pulleys through two synchronous belts 64. Specifically, when the motor 47 drives the roller body 461 to rotate, the bevel gear 62 cooperates to drive the linkage shaft 61 to rotate together. The rotation of the linkage shaft 61 drives the double-groove pulley 63 to drive the two middle shafts 52 to rotate together through the synchronous belt 64. The middle shaft 52 drives the driving rod 548 fixed to its bottom end to rotate together. During the rotation process, the driving column 547 moves in the strip groove 546, thereby driving the swing rod 545 to swing left and right. While swinging, the fixed rod 542 and the moving rod 543 are synchronously driven to swing together through the connecting shaft. In the process of swinging from the middle to the left or right, the moving rod 543 gradually extends outwards under the drive of the second spring 544, so that the contact range thereof is increased, and the transfer film 33 is fully contacted. When it turns to the middle position, the movable rod 543 is restored to a fully retracted state under the drive of the track member 55. At the same time, the track member 55 can smooth the transfer film 33 after hot pressing, and can disperse the bubbles generated during the hot pressing process to both sides. At the same time, the fixed rod 542 and the movable rod 543 at the front end can adjust the tension of the transfer film 33 when swinging, so that it remains taut, thereby enabling it to fully contact with the upper belt body 45.

[0025] like Figure 4As shown, a plurality of annular grooves are provided on the roller body 461, and an arc-surface protrusion 462 is inserted into the bottom wall of the annular groove through a slot, and a screw 463 is rotatably connected to the middle part of the top wall of the annular groove through a countersunk hole, and the arc-surface protrusion 462 is threadedly sleeved on the outer surface of the screw 463. The flattening unit 50 also includes an intermittent pressure unit 53, and the intermittent pressure unit 53 includes a tube cross frame 531 fixed to the inner side of the upper mounting frame 41, and a vertical rod 532 is inserted into the tube cross frame 531, and the vertical rod 532 The top of the vertical rod 532 is fixed with a support seat 533 in contact with the arc-surface protrusion 462. In the initial state, the arc surface of the bottom of the arc-surface protrusion 462 is flush with the inner wall of the ring groove. Before use, the arc-surface protrusion 462 can be protruded outward to a desired position by rotating the screw 463. The bottom end of the vertical rod 532 is equipped with a rolling shaft 534 through a U shape. The first spring 535 is equipped on the tube cross frame 531 through a first shock-absorbing pad. One end of the first spring 535 is connected to the vertical rod 532. Specifically, when the roller body 461 rotates, the raised arc-shaped block 462 in the annular groove rotates therewith, and when it gradually contacts the abutting seat 533, it drives the abutting seat 533 to drive the vertical rod 532 to move downward, thereby causing the rolling shaft 534 to apply pressure to the hot-pressed film body, which helps to disperse the bubbles. When the inner wall of the annular groove gradually contacts the abutting seat 533, the vertical rod 532 gradually moves upward with the rolling shaft 534 under the action of the first spring 535, and does not contact the film body, and this reciprocating process is repeated to achieve the function of intermittent pressure application.

[0026] like Figure 5 and Figure 7 As shown, the cooling unit 20 also includes a support frame 22, and the cooling plate 21 is assembled on the inner side of the support frame 22, and a channel groove is left between the two cooling plates 21 for the transfer film 33 and the laser film 34 to pass through after the combined films. The transfer film 33 and the laser film 34 are guided to the outside of the body 10 after passing through the channel groove.

[0027] Specifically, the channel grooves between the cooling plates 21 provide a confined cooling space for the transfer film 33 and the laser film 34 after the film is combined, which helps to speed up the cooling speed of the film body while reducing the impact of the external environment on the cooling process. It can more effectively fix the transfer pattern and prevent the pattern from deforming or falling off during subsequent processing.

[0028] A laser film rapid printing method comprises the following steps: S1. First, one end of the transfer film 33 and the laser film 34 is guided to the outside of the machine body 10 after passing through the partial hot pressing unit 40, the flattening unit 50 and the cooling unit 20 to complete the film installation; S2. After the installation is completed, the motor 47 is started to drive the tension roller 46 and the upper transmission roller 43 to rotate, so that the upper belt body 45 is cyclically rotated, and the upper belt body 45 and the heating roller 44 at the front end are partially heated, and then the heat is transferred to the transfer film 33 guided thereunder, and the transfer film 33 is heated. At the same time, the transfer film 33 is rolled by the heating roller 44 to make the transfer film 33 and the laser film 34 fit together, so that the surface pattern is transferred to the surface of the laser film 34; S3. During the heating process at the front end, the flattening member 54 at one side of the heating roller 44 at the front end swings left and right under the drive of the transmission member 60, slightly pressing the transfer film 33 to adjust its tension, which helps to keep the transfer film 33 in a taut state, thereby making it more stable during the heating and transfer process. At the same time, the flattening member 54 can also apply a certain pressure to the transfer film 33, which helps to make the transfer film 33 and the laser film 34 fit together more closely, thereby improving the transfer effect. S4, when the combined transfer film 33 and laser film 34 continue to move, the roller shaft 534 that reciprocates up and down first applies pressure to the transferred film body intermittently to disperse the bubbles generated during the transfer process, and then the flattening piece 54 that reciprocates at the rear end drives the bubbles out from both sides and enables the combined film body to remain tightly fitted; S5. Then, in the process of continuing to move, the contact portion of the upper belt body 45 with the heating roller 44 at the rear end is heated, and then the heat is transferred to the transfer film 33 that has been laminated and guided below it, and the transfer film 33 is heated again. At the same time, it is rolled by the heating roller 44 to ensure the integrity of the transfer and improve the transfer effect. Finally, the film body is cooled by the cooling plate 21.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser film rapid printing device, comprising a machine body (10) and a cooling unit (20) mounted in the machine body (10), the cooling unit (20) comprising a cooling plate (21) for cooling, a transfer unit (30) being mounted in the machine body (10) via a mounting plate, the transfer unit (30) comprising an upper roller (31) and a lower roller (32), a transfer film (33) and a laser film (34) being mounted on the upper roller (31) and the lower roller (32), respectively, wherein: A partial hot pressing unit (40) is mounted on the inner wall of the machine body (10), and the partial hot pressing unit (40) is connected to a flattening unit (50) via a lower mounting frame (42); The partial hot pressing unit (40) comprises an upper mounting frame (41), an upper transmission roller (43) is mounted on the top of the inner side of the upper mounting frame (41), a heating roller (44) is mounted on the top of the inner side of the lower mounting frame (42), an upper belt body (45) is sleeved on the upper transmission roller (43) and the heating roller (44), a tensioning roller (46) for abutting against the upper belt body (45) is mounted on the inner side of the upper mounting frame (41), one end of the tensioning roller (46) is connected to a motor (47), and a supporting belt body (49) is mounted on the lower mounting frame (42) via a lower transmission roller (48); The flattening unit (50) comprises a central axis (52), wherein the central axis (52) is connected to a tensioning roller (46) via a transmission member (60), and one end of the central axis (52) is connected to a flattening member (54) that can swing left and right, and one side of the flattening member (54) is provided with a track member (55) for guiding the flattening member (54) to extend and retract during the swinging process, so that after the upper belt (45) heated by the front heating roller (44) uniformly heats the transfer film (33) and causes it to be pressed with the laser film (34), bubbles generated during the transfer process can be driven out from the edge under the action of the flattening member (54) that swings back and forth and retracts.

2. The laser film rapid printing device according to claim 1, characterized in that: The leveling member (54) comprises a lower cross frame (541) fixed on the lower mounting frame (42); a connecting shaft is rotatably connected to the lower cross frame (541); a fixed rod (542) is fixed to the bottom end of the connecting shaft; a moving rod (543) is slidably sleeved on the outer surface of the fixed rod (542); a second spring (544) is installed in the fixed rod (542) via a long slot; one end of the second spring (544) is connected to the inner wall of the moving rod (543).

3. The laser film rapid printing device according to claim 2, characterized in that: A swing rod (545) is fixed to the top end of the connecting shaft, a driving column (547) is inserted into the swing rod (545) through a strip groove (546), a driving rod (548) is fixed to the top end of the driving column (547), and the bottom end of the central axis (52) is fixed to the center of the driving rod (548).

4. The laser film rapid printing device according to claim 1, characterized in that: The tensioning roller (46) comprises a roller body (461) rotatably connected to the upper mounting frame (41), the roller body (461) being provided with a plurality of annular grooves, an arc-surface protrusion (462) being inserted into the bottom wall of the annular groove via a slot, a screw rod (463) being rotatably connected to the middle portion of the top wall of the annular groove via a countersunk hole, and the arc-surface protrusion (462) being threadedly sleeved on the outer surface of the screw rod (463).

5. The laser film rapid printing device according to claim 4, characterized in that: The leveling unit (50) further comprises an intermittent pressure applying unit (53); The intermittent pressure unit (53) comprises a tube-carrying cross frame (531) fixed to the inner side of the upper mounting frame (41); a vertical rod (532) is inserted into the tube-carrying cross frame (531); a top end of the vertical rod (532) is fixed with a supporting seat (533) in contact with the arc-surface protrusion (462); a bottom end of the vertical rod (532) is equipped with a rolling shaft (534) via a U-shape; a first spring (535) is equipped on the tube-carrying cross frame (531) via a first shock-absorbing pad; one end of the first spring (535) is connected to the vertical rod (532).

6. The laser film rapid printing device according to claim 5, characterized in that: The leveling unit (50) further comprises an upper crossbar (51), wherein the upper crossbar (51) is mounted on the lower mounting frame (42), and the middle shaft (52) is rotatably connected to the crossbar (51).

7. The laser film rapid printing device according to claim 4, characterized in that: The transmission member (60) comprises a linkage shaft (61), a bearing seat is sleeved on the linkage shaft (61), the two bearing seats are respectively fixed to the upper mounting frame (41) and the lower mounting frame (42), the top end of the linkage shaft (61) and one end of the roller body (461) passing through the upper mounting frame (41) are both fixed with bevel gears (62), and the two bevel gears (62) are meshed with each other; A double-groove pulley (63) and a single-groove pulley are respectively fixed to the outer surface of the linkage shaft (61) and the top end of the middle shaft (52); the double-groove pulley (63) is connected to the two single-groove pulleys via two synchronous belts (64).

8. The laser film rapid printing device according to claim 1, characterized in that: The partial hot pressing unit (40) further comprises a supporting transverse plate (410), wherein the supporting transverse plate (410) is fixed to the inner side of the lower mounting frame (42) so as to support the upper part of the supporting belt body (49).

9. The laser film rapid printing device according to claim 1, characterized in that: The cooling unit (20) further comprises a support frame (22), the cooling plate (21) being mounted on the inner side of the support frame (22), and a channel groove for the transfer film (33) and the laser film (34) to pass through after the films are combined, and the transfer film (33) and the laser film (34) are guided to the outside of the machine body (10) after passing through the channel groove.

10. A printing method for a laser film rapid printing device as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1. First, one end of the transfer film (33) and the laser film (34) is passed through the partial hot pressing unit (40), the flattening unit (50) and the cooling unit (20) and then guided to the outside of the machine body (10) to complete the installation of the film; S2. After the installation is completed, the motor (47) is started to drive the tension roller (46) and the upper transmission roller (43) to rotate, so that the upper belt body (45) is cyclically rotated, and the upper belt body (45) and the heating roller (44) at the front end are partially heated, and then the heat is transferred to the transfer film (33) guided thereunder, and the transfer film (33) is heated. At the same time, the transfer film (33) is rolled by the heating roller (44) to make the transfer film (33) and the laser film (34) fit together, so that the pattern on the surface is transferred to the surface of the laser film (34); S3. During the heating process at the front end, the flattening member (54) located on one side of the heating roller (44) at the front end swings left and right under the drive of the transmission member (60), slightly pressing the transfer film (33) to adjust its tension, which helps to keep the transfer film (33) in a taut state, thereby making it more stable during the heating and transfer process. At the same time, the flattening member (54) can also apply a certain pressure to the transfer film (33), which helps to make the transfer film (33) and the laser film (34) fit together more closely, thereby improving the transfer effect; S4, when the combined transfer film (33) and laser film (34) continue to move, the roller shaft (534) that reciprocates up and down first applies pressure to the transferred film body intermittently, so that bubbles generated during the transfer process are dispersed, and then the flattening member (54) that reciprocates at the rear end drives out the bubbles from both sides and enables the combined film body to remain tightly attached; S5. Then, as the upper belt (45) continues to move, the contact portion with the heating roller (44) at the rear end is heated, and the heat is then transferred to the transfer film (33) that has been laminated and guided below it, and the transfer film (33) is heated again. At the same time, the transfer film (33) is rolled by the heating roller (44) to ensure the integrity of the transfer and improve the transfer effect. Finally, the film body is cooled by the cooling plate (21).

Images