Variable non-linear beam laser printing method

Abstract

The application belongs to the technical field of laser printing and winding device, in particular to a variable non-linear light column laser printing method, which comprises the following steps: unwinding the laser film through the unwinding device, the laser film enters into the laser printer, and the laser printer prints the laser film; through the structural design of the detection mechanism, in the process of rotating the winding roller driven by the first motor, the winding roller continuously winds the product onto its surface, and the product is in a tight state when being wound; when the thickness of the product on the winding roller reaches a certain degree, the contact block will be compressed by the product, the contact block drives the moving column and the circular block to move, the circular block contacts the pressure sensor, the circular block compresses the pressure sensor, the pressure sensor generates a value, and when the value of the pressure sensor reaches a set range, it means that the thickness of the product on the winding roller reaches the requirement, the thickness of the product on the winding roller is accurately known, and a new winding roller is replaced.

Description

Technical Field

[0001] This invention relates to the field of laser printing rewinding equipment technology, specifically a variable nonlinear laser printing method. Background Technology

[0002] Laser printing technology has a dazzling visual effect and unique anti-counterfeiting function. Laser printing requires the use of special laser printing film, which is widely used in high-end packaging boxes, high-end cigarette boxes, lamination, pharmaceutical and cosmetic packaging and other fields.

[0003] Beam laser is a widely used type of laser effect. The incident light emitted by the light source is reflected by a reflective grating and forms diffracted light on the surface of the laser film, which is then observed and received. This is manifested as a distribution of bright stripes with different brightness on the surface of the laser film. The beam of beam laser is a straight line.

[0004] After the product is laser-printed, it needs to be wound up using a winding device. Currently, the thickness of the wound product on the winding roller can only be judged based on the experience of the staff, so as to determine whether a new winding roller needs to be replaced. This results in a large error in the thickness of the product on each winding roller, and replacing a new winding roller requires the winding device to be stopped for a long time. Therefore, a variable nonlinear laser printing method is proposed to address the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, such as the difficulty in determining the thickness of the wound product on the take-up roller and the need to stop the take-up device for an extended period when replacing the take-up roller, this invention proposes a variable non-linear laser printing method.

[0006] The technical solution adopted by this invention to solve its technical problem is: a variable nonlinear laser printing method, comprising the following steps:

[0007] S1: The laser film is unwound by the unwinding device and enters the laser printing machine, where it is printed.

[0008] S2: The ink used in the laser printing machine is a mixture of magnetic material and UV ink, which makes the UV ink magnetic. When the magnetic ink passes through the electromagnet component set in the laser printing machine, the magnetic ink forms a corresponding variable non-linear light column under the influence of the electromagnet, forming various patterns and texts printed on the laser film.

[0009] S3: Initial drying of the magnetic ink on the laser film using a UV lamp;

[0010] S4: The paper to be printed is rolled into the film pressing unit, the paper is pressed tightly against the laser film, and then the laser layer and pattern or text of the laser film are transferred to the paper through the film pressing unit.

[0011] S5: Use a UV lamp again to irradiate the ink on the dried paper to separate the paper from the laser film;

[0012] S6: The printed paper is rolled up using a winding device.

[0013] Preferably, the winding device in S6 specifically comprises: a base plate, two rotating rollers above the base plate, a winding roller sleeved on the surface of the two rotating rollers, hexagonal slots at both ends of the two rotating rollers, two first support plates fixedly connected to the top of the base plate, a movable plate slidably connected to the top of the two first support plates, a first motor fixedly connected to one of the movable plates, and a rotating shaft rotatably connected to the other movable plate via a bearing, a hexagonal insert fixedly connected to one end of the rotating shaft and the output end of the first motor, the two hexagonal inserts being inserted into the two hexagonal slots of the upper rotating roller, two first L-shaped plates above the base plate, the first L-shaped plates being rotatably connected to one end of the rotating rollers via a bearing, and a detection mechanism being provided on the first L-shaped plates;

[0014] The detection mechanism includes four first fixed posts fixed to a first L-shaped plate. A first fixed plate is fixed to one end of each of the four first fixed posts. A movable post is slidably inserted into the first fixed plate. Two of the first L-shaped plates have third circular holes. A contact block is fixed to one end of each movable post through the third circular hole. A circular block is fixed to the other end of each movable post. A circular plate is fixed to the surface of each movable post. A spring is fixed between the circular plate and the first fixed plate. The spring is sleeved on the outside of the movable post. Four second fixed posts are fixed to the first fixed plate. A second fixed plate is fixed to one end of each of the four second fixed posts. A pressure sensor is fixed to the second fixed plate, and the pressure sensor is directly opposite the circular block.

[0015] Preferably, the top of the base plate is provided with a replacement assembly, which includes a second support plate fixedly connected to the top of the base plate, a second motor fixedly connected to the top of the base plate, a threaded rod fixedly connected to the output end of the second motor, the top end of the threaded rod being rotatably connected to the second support plate via a bearing, a lifting plate being threadedly connected to the surface of the threaded rod, two guide rods fixedly connected between the second support plate and the base plate, the guide rods passing through the lifting plate, a connecting plate fixedly connected to the lifting plate, the connecting plate being fixedly connected to two first L-shaped plates, and a first electric push rod fixedly connected to the top of the two first support plates, the output end of the first electric push rod being fixedly connected to a moving plate.

[0016] Preferably, the first L-shaped plate is provided with a support and limiting assembly, the support and limiting assembly includes a second L-shaped plate fixedly connected to the first L-shaped plate, a second electric push rod fixedly connected to the second L-shaped plate, a connecting block fixedly connected to the output end of the second electric push rod, a limiting plate fixedly connected to the connecting block, the limiting plate contacting one end of the take-up roller, an arc-shaped block fixedly connected to the top of the connecting block, an arc-shaped groove formed on the arc-shaped block, a roller rotatably connected to the arc-shaped groove via a pin, a baffle fixedly connected to the surface of the rotating roller, and the baffle contacting the other end of the take-up roller.

[0017] Preferably, the first L-shaped plate is provided with a fixing component, the fixing component includes a horizontal plate fixed to the first L-shaped plate, a third electric push rod fixed to the horizontal plate, a moving block fixed to the output end of the third electric push rod, a first rubber pad fixed to the moving block, and a second rubber pad fixed to the baffle plate.

[0018] Preferably, four positioning strips are fixedly connected to the surface of the rotating roller, and four positioning grooves are opened on the inner wall of the winding roller, with the positioning strips slidably connected in the positioning grooves.

[0019] Preferably, the first fixed plate has a first circular hole, through which the movable column slides.

[0020] Preferably, the lifting plate has two second circular holes, and the guide rod passes through the second circular holes.

[0021] The advantages of this invention are:

[0022] 1. Through the structural design of the detection mechanism, this invention continuously winds the product onto its surface during the rotation of the first motor-driven take-up roller. The product is in a taut state during winding. When the thickness of the product on the take-up roller reaches a certain level, the contact block is pressed by the product. The contact block drives the moving column and the circular block to move, so that the circular block comes into contact with the pressure sensor. The circular block presses the pressure sensor, causing the pressure sensor to generate a value. When the pressure sensor value reaches the set range, it indicates that the thickness of the product on the take-up roller has reached the requirement. This enables accurate determination of the thickness of the product on the take-up roller, thereby allowing for the replacement of a new take-up roller and solving the current problem of inconvenience in judging the thickness of the wound product on the take-up roller.

[0023] 2. This invention, through its component replacement structure design, allows for the replacement of a new take-up roller. When a new take-up roller needs to be replaced, two first electric push rods are activated. These push rods drive a hexagonal insert block away from the hexagonal slot. A second motor is then activated, driving a threaded rod to rotate. This threaded rod causes a lifting plate to move vertically, bringing the unused take-up roller to a position horizontal with the first motor. The first electric push rods are then activated, inserting the hexagonal insert block into the hexagonal slot, completing the replacement. This design allows for a shorter downtime for the device when replacing the take-up roller, solving the problem of requiring a longer downtime for the take-up device and improving the efficiency of take-up roller replacement. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0026] Figure 2 This is a three-dimensional structural diagram of Example 1;

[0027] Figure 3 This is a schematic diagram of the rotating roller and take-up roller structure in Example 1;

[0028] Figure 4 This is a schematic diagram of the testing facility in Example 1;

[0029] Figure 5 This is a schematic diagram of the support and limiting component in Embodiment 1;

[0030] Figure 6 This is a schematic diagram of the fixed component structure in Embodiment 1;

[0031] Figure 7 This is a schematic diagram of the first fixing plate structure in Embodiment 1.

[0032] In the diagram: 1. Base plate; 2. Rotating roller; 3. Rewinding roller; 4. Hexagonal slot; 5. First support plate; 6. Moving plate; 7. First motor; 8. Hexagonal insert; 9. First L-shaped plate; 10. First fixed post; 11. First fixed plate; 12. Moving post; 13. Contact block; 14. Round block; 15. Round plate; 16. Spring; 17. Second fixed post; 18. Second fixed plate; 19. Pressure sensor; 20. Second support plate; 21. Second motor; 22. Threaded rod; 23. Lifting rod. 24. Lowering plate; 25. Guide rod; 26. Connecting plate; 27. First electric push rod; 28. Second L-shaped plate; 29. ​​Second electric push rod; 30. Connecting block; 31. Limiting plate; 32. Arc-shaped block; 33. Arc-shaped groove; 34. Roller; 35. Baffle; 36. Horizontal plate; 37. Third electric push rod; 38. Moving block; 39. First rubber pad; 40. Second rubber pad; 41. Positioning strip; 42. Positioning groove; 43. First round hole; 44. Second round hole; 45. Rotating shaft; 46. Third round hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] Please see Figures 1-7 As shown, a variable nonlinear laser beam printing method includes the following steps:

[0036] S1: The laser film is unwound by the unwinding device and enters the laser printing machine, where it is printed.

[0037] S2: The ink used in the laser printing machine is a mixture of magnetic material and UV ink, which makes the UV ink magnetic. When the magnetic ink passes through the electromagnet component set in the laser printing machine, the magnetic ink forms a corresponding variable non-linear light column under the influence of the electromagnet, forming various patterns and texts printed on the laser film.

[0038] S3: Initial drying of the magnetic ink on the laser film using a UV lamp;

[0039] S4: The paper to be printed is rolled into the film pressing unit, the paper is pressed tightly against the laser film, and then the laser layer and pattern or text of the laser film are transferred to the paper through the film pressing unit.

[0040] S5: Use a UV lamp again to irradiate the ink on the dried paper to separate the paper from the laser film;

[0041] S6: The printed paper is wound up using a winding device;

[0042] The winding device in S6 specifically includes a base plate 1, two rotating rollers 2 are provided above the base plate 1, and winding rollers 3 are sleeved on the surface of the two rotating rollers 2. Hexagonal slots 4 are opened at both ends of the two rotating rollers 2. Two first support plates 5 are fixedly connected to the top of the base plate 1. A movable plate 6 is slidably connected to the top of the two first support plates 5. A first motor 7 is fixedly connected to one of the movable plates 6, and a rotating shaft 44 is rotatably connected to the other movable plate 6 through a bearing. A hexagonal insert 8 is fixedly connected to one end of the rotating shaft 44 and the output end of the first motor 7. The two hexagonal inserts 8 are inserted into the two hexagonal slots 4 of the upper rotating roller 2. Two first L-shaped plates 9 are provided above the base plate 1. The first L-shaped plates 9 are rotatably connected to one end of the rotating roller 2 through a bearing. A detection mechanism is provided on the first L-shaped plates 9.

[0043] The detection mechanism includes four first fixed posts 10 fixed to the first L-shaped plate 9. One end of each of the four first fixed posts 10 is fixed to a first fixed plate 11. A movable post 12 is slidably inserted into the first fixed plate 11. Two of the first L-shaped plates 9 have third circular holes 45. One end of each movable post 12 passes through the third circular hole 45 and is fixed to a contact block 13. The other end of each movable post 12 is fixed to a circular block 14. A circular plate 15 is fixed to the surface of each movable post 12. A spring 16 is fixed between the circular plate 15 and the first fixed plate 11. The spring 16 is sleeved on the outside of the movable post 12. Four second fixed posts 17 are fixed to the first fixed plate 11. One end of each of the four second fixed posts 17 is fixed to a second fixed plate 18. A pressure sensor 19 is fixed to the second fixed plate 18. The pressure sensor 19 is directly opposite the circular block 14.

[0044] During operation, after laser printing is completed, the printed paper is glued to the surface of the take-up roller 3, allowing the paper to be wound up while remaining taut. The first motor 7 is then started, driving the hexagonal insert 8 to rotate. The hexagonal insert 8 drives the rotating roller 2 to rotate, which in turn drives the take-up roller 3 to rotate. The take-up roller 3 winds the paper onto its surface. When the thickness of the paper on the take-up roller 3 reaches a certain level, the contact block 13 is slowly pressed by the paper. The contact block 13 drives the moving column 12 and the circular block 14 to move. The movement of the circular block 14 presses against the pressure sensor 19, causing the pressure sensor 19 to generate data. When the data from the pressure sensor 19 reaches the set range, it indicates that the product thickness on the take-up roller 3 has reached the required level, and a new take-up roller 3 needs to be replaced.

[0045] The top of the base plate 1 is provided with a replacement assembly, which includes a second support plate 20 fixedly connected to the top of the base plate 1. A second motor 21 is fixedly connected to the top of the base plate 1. A threaded rod 22 is fixedly connected to the output end of the second motor 21. The top end of the threaded rod 22 is rotatably connected to the second support plate 20 through a bearing. A lifting plate 23 is threadedly connected to the surface of the threaded rod 22. Two guide rods 24 are fixedly connected between the second support plate 20 and the base plate 1. The guide rods 24 pass through the lifting plate 23. A connecting plate 25 is fixedly connected to the lifting plate 23. The connecting plate 25 is fixedly connected to two first L-shaped plates 9. A first electric push rod 26 is fixedly connected to the top of the two first support plates 9. The output end of the first electric push rod 26 is fixedly connected to the moving plate 6.

[0046] During operation, the paper is cut using a cutting device. Two first electric push rods 26 are activated, driving the moving plate 6 to move. The moving plate 6 causes the hexagonal insert 8 to leave the hexagonal slot 4. The second motor 21 is then activated, driving the threaded rod 22 to rotate. The threaded rod 22 causes the lifting plate 23 to move vertically. The lifting plate 23 causes the connecting plate 25 to move, which in turn causes the two first L-shaped plates 9 to move. The first L-shaped plates 9 then cause the two rotating rollers 2 and the take-up roller 3 to move, bringing the unused take-up roller 3 to a position horizontal with the first motor 7. The first rubber pad 38 and the second rubber pad 39 on the unused take-up roller 3 are then in close contact, keeping the take-up roller 3 stationary. The first electric push rod 26 is then activated, driving the hexagonal insert 8 to insert into the hexagonal slot 4, completing the replacement. The first motor 7 is then activated, and the new take-up roller 3 can be used.

[0047] The first L-shaped plate 9 is provided with a support and limiting assembly. The support and limiting assembly includes a second L-shaped plate 27 fixedly connected to the first L-shaped plate 9. A second electric push rod 28 is fixedly connected to the second L-shaped plate 27. A connecting block 29 is fixedly connected to the output end of the second electric push rod 28. A limiting plate 30 is fixedly connected to the connecting block 29. The limiting plate 30 contacts one end of the take-up roller 3. An arc-shaped block 31 is fixedly connected to the top of the connecting block 29. An arc-shaped groove 32 is opened on the arc-shaped block 31. A roller 33 is rotatably connected to the arc-shaped groove 32 through a pin shaft. A baffle 34 is fixedly connected to the surface of the rotating roller 2. The baffle 34 contacts the other end of the take-up roller 3.

[0048] During operation, when it is necessary to remove the completed take-up roller 3, the second electric push rod 28 is activated. The second electric push rod 28 drives the connecting block 29 to move downward. The connecting block 29 drives the limiting plate 30 to move downward, releasing the limitation on the take-up roller 3. The connecting block 29 drives the arc-shaped block 31 and the roller 33 to move downward, no longer supporting the rotating roller 2, and no longer preventing the take-up roller 3 from sliding out of the rotating roller 2. The take-up roller 3 can then slide out from the surface of the rotating roller 2, and the paperless take-up roller 3 can be slidably inserted into the positioning strip 40 and the positioning groove 41. On the rotating roller 2, one end of the take-up roller 3 abuts against the baffle 34, and the second rubber pad 39 is aligned with the first rubber pad 38. The second electric push rod 28 is activated, and the second electric push rod 28 drives the roller 33 to move upward, so that the roller 33 contacts the surface of the rotating roller 2. During the rotation of the rotating roller 2, the rotating roller 2 rotates on the roller 33. The second electric push rod 28 can drive the limiting plate 30 to move, so that the limiting plate 30 contacts the other end of the take-up roller 3, thereby limiting the take-up roller 3 and preventing the take-up roller 3 from sliding left and right on the rotating roller 2.

[0049] The first L-shaped plate 9 is provided with a fixing component, the fixing component includes a horizontal plate 35 fixed to the first L-shaped plate 9, a third electric push rod 36 fixed to the horizontal plate 35, a moving block 37 fixed to the output end of the third electric push rod 36, a first rubber pad 38 fixed to the moving block 37, and a second rubber pad 39 fixed to the baffle 34.

[0050] During operation, the third electric push rod 36 is activated, which drives the moving block 37 to move. The moving block 37 drives the first rubber pad 38 to move, so that the first rubber pad 38 contacts the second rubber pad 39, preventing the take-up roller 3 from rotating randomly, and preparing for the subsequent insertion of the hexagonal insert 8 into the hexagonal slot 4.

[0051] Four positioning strips 40 are fixedly connected to the surface of the rotating roller 2, and four positioning grooves 41 are opened on the inner wall of the winding roller 3. The positioning strips 40 are slidably connected in the positioning grooves 41.

[0052] During operation, when setting up a new take-up roller 3, the positioning strip 40 is slidably inserted into the positioning groove 41 to achieve a positioning function.

[0053] The first fixed plate 11 has a first circular hole 42, and the moving column 12 slides through the first circular hole 42;

[0054] During operation, as the contact block 13 moves, the moving column 12 slides within the first circular hole 42, limiting the contact block 13 to the horizontal direction.

[0055] The lifting plate 23 has two second circular holes 43, and the guide rod 24 passes through the second circular holes 43.

[0056] During operation, as the lifting plate 23 moves, the guide rod 24 slides within the second circular hole 43, limiting the lifting plate 23 to the vertical direction.

[0057] Working Principle: During use, after laser printing is completed, the printed paper is glued to the surface of the take-up roller 3, allowing the paper to be wound up taut. The first motor 7 is started, driving the hexagonal insert 8 to rotate. The hexagonal insert 8 drives the rotating roller 2 to rotate, which in turn drives the take-up roller 3 to rotate. The take-up roller 3 winds the paper onto its surface. When the thickness of the paper on the take-up roller 3 reaches a certain level, the contact block 13 is gradually pressed by the paper. The contact block 13 drives the moving column 12 and the circular block 14 to move. The movement of the circular block 14 presses against the pressure sensor 19, causing it to generate data. When the data from the pressure sensor 19 reaches the set range, it indicates that the product thickness on the take-up roller 3 has met the requirements and needs to be removed. Replace the take-up roller 3 with a new one. Use a cutting device to cut the paper. Activate the two first electric push rods 26. The first electric push rods 26 drive the moving plate 6 to move. The moving plate 6 moves the hexagonal insert 8 away from the hexagonal slot 4. Activate the second motor 21. The second motor 21 drives the threaded rod 22 to rotate. The threaded rod 22 drives the lifting plate 23 to move vertically. The lifting plate 23 drives the connecting plate 25 to move. The connecting plate 25 drives the two first L-shaped plates 9 to move. The first L-shaped plates 9 drive the two rotating rollers 2 and the take-up roller 3 to move, so that the unused take-up roller 3 moves to a position horizontal with the first motor 7, and the first rubber pad 38 on the unused take-up roller 3 is in close contact with the second rubber pad 39, so that the take-up roller 3 remains stationary. Activate the first electric push rod 26. Push rod 26, the first electric push rod 26 drives the hexagonal insert block 8 to insert into the hexagonal slot 4, completing the replacement. The first motor 7 is then started to use the new take-up roller 3. When it is necessary to remove the finished take-up roller 3, the second electric push rod 28 is started. The second electric push rod 28 drives the connecting block 29 to move downwards. The connecting block 29 drives the limiting plate 30 to move downwards, releasing the limitation on the take-up roller 3. The connecting block 29 drives the arc block 31 and roller 33 to move downwards, no longer supporting the rotating roller 2, and no longer obstructing the take-up roller 3 from sliding out of the rotating roller 2. The take-up roller 3, without paper, is then slidably inserted into the rotating roller 2 according to the positioning strip 40 and positioning groove 41, so that one end of the take-up roller 3 abuts against the baffle 34, allowing the second... Rubber pad 39 is aligned with first rubber pad 38. Second electric push rod 28 is activated, driving roller 33 to move upward, so that roller 33 contacts the surface of rotating roller 2. During the rotation of rotating roller 2, rotating roller 2 rotates on roller 33. Second electric push rod 28 can drive limit plate 30 to move, so that limit plate 30 contacts the other end of take-up roller 3, limiting take-up roller 3 and preventing take-up roller 3 from sliding left and right on rotating roller 2. Third electric push rod 36 is activated, driving moving block 37 to move. Moving block 37 drives first rubber pad 38 to move, so that first rubber pad 38 contacts second rubber pad 39, preventing take-up roller 3 from rotating arbitrarily, preparing for subsequent insertion of hexagonal insert 8 into hexagonal slot 4.

[0058] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A method for variable nonlinear laser printing, characterized in that: Includes the following steps: S1: The laser film is unwound by the unwinding device and enters the laser printing machine, where it is printed. S2: The ink used in the laser printing machine is a mixture of magnetic material and UV ink, which makes the UV ink magnetic. When the magnetic ink passes through the electromagnet component set in the laser printing machine, the magnetic ink forms a corresponding variable non-linear light column under the influence of the electromagnet, forming various patterns and texts printed on the laser film. S3: Initial drying of the magnetic ink on the laser film using a UV lamp; S4: The paper to be printed is rolled into the film pressing unit, the paper is pressed tightly against the laser film, and then the laser layer and pattern or text of the laser film are transferred to the paper through the film pressing unit. S5: Use a UV lamp again to irradiate the ink on the dried paper to separate the paper from the laser film; S6: The printed paper is wound up using a winding device; The winding device in S6 is specifically as follows: The winding device includes a base plate (1), two rotating rollers (2) are provided above the base plate (1), and winding rollers (3) are sleeved on the surface of the two rotating rollers (2). Hexagonal slots (4) are opened at both ends of the two rotating rollers (2). Two first support plates (5) are fixedly connected to the top of the base plate (1). A moving plate (6) is slidably connected to the top of the two first support plates (5). A first motor (7) is fixedly connected to one of the moving plates (6), and a rotating shaft (44) is rotatably connected to the other moving plate (6) through a bearing. A hexagonal insert (8) is fixedly connected to one end of the rotating shaft (44) and the output end of the first motor (7). The two hexagonal inserts (8) are inserted into the two hexagonal slots (4) of the upper rotating roller (2). Two first L-shaped plates (9) are provided above the base plate (1). The first L-shaped plates (9) are rotatably connected to one end of the rotating rollers (2) through a bearing. A detection mechanism is provided on the first L-shaped plates (9). The detection mechanism includes four first fixed columns (10) fixed to the first L-shaped plate (9), one end of each first fixed column (10) is fixed to a first fixed plate (11), a movable column (12) is slidably inserted on the first fixed plate (11), two first L-shaped plates (9) are provided with third circular holes (45), one end of each movable column (12) passes through the third circular hole (45) and is fixedly connected to a contact block (13), and the other end of each movable column (12) is fixedly connected to a circular block (14). A circular plate (15) is fixed to the surface of the column (12). A spring (16) is fixed between the circular plate (15) and the first fixed plate (11). The spring (16) is sleeved on the outside of the movable column (12). Four second fixed columns (17) are fixed to the first fixed plate (11). A second fixed plate (18) is fixed to one end of the four second fixed columns (17). A pressure sensor (19) is fixed to the second fixed plate (18). The pressure sensor (19) is directly opposite the circular block (14).

2. The variable nonlinear laser printing method according to claim 1, characterized in that: The top of the base plate (1) is provided with a replacement assembly, which includes a second support plate (20) fixedly connected to the top of the base plate (1). A second motor (21) is fixedly connected to the top of the base plate (1). A threaded rod (22) is fixedly connected to the output end of the second motor (21). The top end of the threaded rod (22) is rotatably connected to the second support plate (20) through a bearing. A lifting plate (23) is threadedly connected to the surface of the threaded rod (22). Two guide rods (24) are fixedly connected between the second support plate (20) and the base plate (1). The guide rods (24) pass through the lifting plate (23). A connecting plate (25) is fixedly connected to the lifting plate (23). The connecting plate (25) is fixedly connected to two first L-shaped plates (9). A first electric push rod (26) is fixedly connected to the top of the two first support plates (5). The output end of the first electric push rod (26) is fixedly connected to the moving plate (6).

3. The variable nonlinear laser printing method according to claim 2, characterized in that: The first L-shaped plate (9) is provided with a support limiting component. The support limiting component includes a second L-shaped plate (27) fixedly connected to the first L-shaped plate (9). A second electric push rod (28) is fixedly connected to the second L-shaped plate (27). A connecting block (29) is fixedly connected to the output end of the second electric push rod (28). A limiting plate (30) is fixedly connected to the connecting block (29). The limiting plate (30) is in contact with one end of the take-up roller (3). An arc-shaped block (31) is fixedly connected to the top of the connecting block (29). An arc-shaped groove (32) is opened on the arc-shaped block (31). A roller (33) is rotatably connected to the arc-shaped groove (32) through a pin shaft. A baffle (34) is fixedly connected to the surface of the rotating roller (2). The baffle (34) is in contact with the other end of the take-up roller (3).

4. The variable nonlinear laser printing method according to claim 3, characterized in that: The first L-shaped plate (9) is provided with a fixing component, the fixing component includes a horizontal plate (35) fixed to the first L-shaped plate (9), a third electric push rod (36) fixed to the horizontal plate (35), a moving block (37) fixed to the output end of the third electric push rod (36), a first rubber pad (38) fixed to the moving block (37), and a second rubber pad (39) fixed to the baffle (34).

5. The variable nonlinear laser printing method according to claim 4, characterized in that: The rotating roller (2) has four positioning strips (40) fixedly attached to its surface, and the inner wall of the winding roller (3) has four positioning grooves (41), with the positioning strips (40) slidably connected in the positioning grooves (41).

6. The variable nonlinear laser printing method according to claim 5, characterized in that: The first fixed plate (11) has a first circular hole (42), and the moving column (12) slides through the first circular hole (42).

7. The variable nonlinear laser printing method according to claim 6, characterized in that: The lifting plate (23) has two second circular holes (43), and the guide rod (24) passes through the second circular holes (43).

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