A printing device for anti-counterfeiting mark of reflective film
Through multi-axis control and a printing platform driven by rotatable laser head and helical gear, the problems of low accuracy and poor adaptability of reflective film printing devices in the prior art are solved, and high-precision full-angle printing of complex anti-counterfeiting marks are realized.
Patent Information
- Application Number
- CN201911055262.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-31
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2039-10-31
AI Technical Summary
The existing reflective film printing devices have low accuracy, inconvenient control, poor adaptability, and cannot print complex anti-counterfeiting marks.
A printing device including multi-axis control is designed to accurately locate the printing module through the movement of the lifting platform, mounting base and mounting plate, and combine a rotatable laser head and a helical gear-driven printing platform to realize the laser beam in the longitudinal direction and The inclination angle control in the horizontal direction is combined with the tensioning mechanism and the biasing mechanism to ensure the stable tension and position adjustment of the reflective film.
It improves printing accuracy and adaptability, can meet the printing needs of complex anti-counterfeiting labels, realizes full-angle printing, has higher applicability, and meets strict production needs.
Smart Images
Figure CN110667262B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of reflective films, and in particular relates to a printing device for anti-counterfeiting marks on reflective films. Background Art
[0002] Reflective film is a kind of retro-reflective material that has been made into a film and can be directly applied. It is also the most widely used retro-reflective material. Reflective film needs to have a strong anti-counterfeiting function in some fields, such as when it is used in license plates. Since license plates are the identity cards of vehicles, they are unique and special. Transportation departments use them to manage vehicles. The anti-counterfeiting marks used on license plates in each country may be different, but the requirements for anti-counterfeiting are the same. At present, the most widely used method is the combination of multiple anti-counterfeiting methods. For example, one anti-counterfeiting mark can be seen from the front of the reflective film, and another anti-counterfeiting mark can be seen from the side of the reflective film.
[0003] At present, the existing printing devices have problems such as low precision, inconvenient control, poor adaptability, etc., and are unable to print complex anti-counterfeiting labels. Summary of the invention
[0004] The object of the present invention is to provide a printing device with high precision and good adaptability.
[0005] The object of the present invention is achieved in that:
[0006] A printing device for a reflective film anti-counterfeiting mark, characterized in that it includes a feeding cylinder, a frame and a coiling cylinder arranged in sequence from front to back, a printing platform is arranged in the middle of the frame, printing brackets are symmetrically arranged on the front and rear sides of the printing platform, a deflection adjustment mechanism and a tensioning mechanism are arranged on the frame between the printing bracket and the feeding cylinder, a tensioning mechanism is arranged on the frame between the printing bracket and the coiling cylinder, a lifting platform capable of moving up and down in the vertical direction is arranged on the printing bracket, a mounting seat capable of moving in the horizontal direction is arranged on the lifting platform, a mounting plate capable of moving in the longitudinal direction is arranged on the mounting seat, and a printing module for printing an anti-counterfeiting mark is arranged at intervals in the longitudinal direction on the mounting plate. The present invention controls the position of the printing module in the vertical direction by controlling the up and down movement of the lifting platform, controls the position of the printing module in the horizontal direction by controlling the mounting seat that moves in the horizontal direction, and controls the position of the printing module in the longitudinal direction by controlling the mounting plate that moves in the longitudinal direction, so that the printing module can reach any required position, the control is more precise, meets the needs of printing various reflective film anti-counterfeiting marks, and has higher adaptability.
[0007] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, the printing module includes a horizontal plate, a vertical plate and a laser head, the inner end of the horizontal plate is vertically fixed to the lower end of the vertical plate, the upper side surface of the mounting plate is provided with a first slide rail in the longitudinal direction, the horizontal plate is slidably connected to the first slide rail, the outer end of the horizontal plate is provided with a lock that can fix the horizontal plate to the mounting plate, the laser head is connected to the inner side surface of the vertical plate through a horizontally arranged connecting shaft, and the laser head can rotate around the connecting shaft. The above-mentioned rotatable laser head can make the laser beam form an inclination angle with the reflective film in the longitudinal direction, which is convenient for printing anti-counterfeiting marks, such as anti-counterfeiting marks that cannot be displayed when viewed from the front and can only be seen when tilted longitudinally, and each laser head can be fixed in a corresponding position through the slidable connection and lock of the horizontal plate and the mounting plate, which is conducive to improving stability.
[0008] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, there are two first slide rails and they are symmetrically arranged on the mounting plate front and back, a parallel first rack is arranged between the two first slide rails, a first gear meshing with the first rack is arranged on the lower side of the horizontal plate, and a first handle for driving the first gear to rotate is arranged on the upper side of the horizontal plate.
[0009] In the above-mentioned printing device for the anti-counterfeiting mark of the reflective film, the upper edge of the vertical plate is provided with positioning holes at intervals in the vertical direction, the inner end of the connecting shaft is fixed to the first slider, and the first slider is fixedly connected to the positioning hole by a fastener. The first slider and the positioning hole cooperate to adjust the vertical height of the laser head, so that the printing device has better adaptability.
[0010] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, two second slide rails that are symmetrical front and back are provided in the longitudinal direction on the upper surface of the mounting seat, and a parallel second rack is provided between the two second slide rails. A second gear that meshes with the second rack can be rotatably provided on the lower end surface of the mounting plate, and a second driving member that drives the second gear to rotate is provided on the upper end surface of the mounting plate.
[0011] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, a third slide rail and a transverse screw rod are horizontally provided on the lower side surface of the mounting seat, a second sliding block cooperating with the third slide rail and a screw nut cooperating with the screw rod are fixed on the lifting platform, and a second handle for driving the transverse screw rod to rotate is provided at one end of the transverse screw rod.
[0012] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, the tensioning mechanism includes two support plates arranged in parallel, one end of the support plate is rotatably connected to the frame via a hinge shaft penetrating the two support plates, the other end of the support plate is provided with a first tensioning roller and a second tensioning roller spaced apart along the length direction of the support plate, a third tensioning roller rotatably connected to the frame is provided above the other end of the support plate, the third tensioning roller is laterally located between the first tensioning roller and the second tensioning roller, and the other ends of the two support plates rotate downward around the hinge shaft to tension the reflective film.
[0013] In the above-mentioned printing device for anti-counterfeiting mark of reflective film, a third driving member capable of driving the other end of the supporting plate to rotate up and down around the hinge shaft is provided on the frame.
[0014] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, pressure detection rollers are respectively provided at the front and rear ends of the frame, and the left and right ends of the pressure detection rollers are rotatably connected to the pressure sensors fixed on the frame, and the pressure applied by the reflective film to the pressure detection rollers is directed toward the pressure sensors. The tensioning mechanism controls the tensioning degree of the reflective film by controlling the rotation of the support plate around the hinge axis, and adjusts the tensioning mechanism in real time through feedback from the pressure detection rollers arranged at the front and rear of the frame, so that the reflective film is always at an appropriate tensioning degree during the entire printing process, which is conducive to improving the stability and safety of printing.
[0015] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, the feed cylinder can be rotatably arranged on the feed mounting frame, a first deviation adjustment sensor is arranged between the feed mounting frame and the front end of the frame, rollers are arranged at the four corners of the bottom of the feed mounting frame, a limit plate cooperating with the roller is arranged on the lower side of the roller, and limit columns are fixed on the left and right sides of the limit plate, and a fourth driving member for driving the feed mounting frame to roll left and right is arranged in the middle of the bottom of the feed mounting frame. The fourth driving member is a cylinder or a hydraulic cylinder; the first deviation adjustment sensor first detects the position of the reflective film just coming out of the feed cylinder, and then drives the feed mounting frame to move longitudinally through the fourth driving member, thereby adjusting the position of the feed cylinder to avoid the position deviation of the reflective film coming out of the feed cylinder.
[0016] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, a deflection adjustment base is provided on the frame between the printing support and the feeding cylinder, a first deflection adjustment roller is provided on the front and rear sides of the upper end surface of the deflection adjustment base, a deflection adjustment support is provided above the deflection adjustment base, a second deflection adjustment roller is provided on the front and rear sides of the deflection adjustment support, a vertically arranged deflection adjustment shaft is connected between the deflection adjustment support and the deflection adjustment base, a fifth driving member capable of driving the deflection adjustment support to rotate around the deflection adjustment shaft is provided on the deflection adjustment base, and a second deflection adjustment sensor is provided between the first deflection adjustment roller and the second deflection adjustment roller. The present invention can adjust the position of the reflective film by driving the deflection adjustment support to rotate around the deflection adjustment shaft through the fifth driving member, so as to achieve the purpose of deflection adjustment; wherein when the fifth driving member drives the right end of the deflection adjustment support to rotate forward, the reflective film will deviate to the right side; when the fifth driving member drives the right end of the deflection adjustment support to rotate backward, the reflective film will deviate to the left side.
[0017] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, the fifth driving member is a hydraulic cylinder, the main body of the fifth driving member can be horizontally rotated and is arranged in the middle of the deviation adjustment base, the piston rod of the fifth driving member is connected to the left side of the rear end of the deviation adjustment bracket, and the deviation adjustment shaft is arranged on the left side of the front end of the deviation adjustment bracket.
[0018] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, an L-shaped connecting plate is fixed to the right side of the rear end of the deviation adjustment bracket, a guide rod is fixed to the vertical part of the connecting plate, a guide plate is fixed on the deviation adjustment base, an arc-shaped guide groove is provided on the side wall of the guide plate, the center of the guide groove is located on the central axis of the deviation adjustment shaft, and the guide rod is placed in the guide groove and can slide along the guide groove.
[0019] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, the table surface at the upper end of the printing platform is evenly distributed with air suction holes, each of which is connected to the suction fan through an air suction duct, and the left and right ends of the printing platform are rotatably connected to the frame through a coaxially arranged rotating shaft, one of which is fixed with a coaxial bevel gear, and a driving rod is rotatably fixed on the frame, and a bevel thread meshing with the bevel gear is formed on the driving rod, and the helical angle β of the bevel gear ranges from 2° to 10°. The rotation of the printing platform in the present invention can make the laser emitted by the laser head form an inclination angle with the reflective film in the horizontal direction, and with the rotatable laser head, the inclination angle of the laser head and the reflective film can be controlled, for example, the printed anti-counterfeiting mark can be seen only when it is at the left rear and at a 45-degree angle with the reflective film, etc., and the reflective film can also be printed multiple times by laser beams at multiple angles, so as to realize multiple anti-counterfeiting marks, and the printing is more stable and more applicable.
[0020] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, bearings are sleeved on both ends of the driving rod, each bearing is fixedly connected to the frame through a bearing seat, and the oblique thread is formed on the driving rod between the two bearings; one end of the driving rod extends from the corresponding bearing and is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is connected to a seventh driving member; the outer end of the rotating shaft fixedly connected to the bevel gear extends out of the frame, and a pointer that can rotate with the rotating shaft is fixed on the outer end of the rotating shaft, and an angle scale that cooperates with the pointer is fixed on the outer surface of the frame, and the angle scale and the pointer can cooperate to indicate the inclination angle of the table surface relative to the horizontal plane. The printing platform drives the helical gear to rotate by meshing with the helical thread, thereby driving the rotation of the printing platform, and because the helix angle β of the helical gear is between 2° and 10°, each rotation of the driving rod can only drive the helical gear to rotate at a small angle, thereby improving the accuracy of controlling the printing platform; at the same time, the printing platform has a driving force to restore the horizontality under the action of gravity, and the driving force acts on the helical thread of the driving rod through the helical gear. Since the β angle is small, the force in the driving force that can cause the driving rod to move in the opposite direction is much smaller than the pressure acting on the axial direction of the driving rod, resulting in the friction between the driving rod and the helical gear being greater than the force causing the driving rod to reverse, thereby ensuring the stability of the printing platform after rotation and avoiding automatic reversal of the printing platform.
[0021] In the above-mentioned printing device of a reflective film anti-counterfeiting mark, at least one pressurizing mechanism is provided on the frame, and the pressurizing mechanism includes a first pressurizing roller and a second pressurizing roller fixed thereto, the first pressurizing roller is fixedly connected to the frame via a roller fixing frame, a mounting frame and a top block are provided on one side of the roller fixing frame, the mounting frame is located between the roller fixing frame and the top block, and a guide block cooperating with the top block is movably provided on the side of the mounting frame facing the top block, and a sixth driving member for driving the top block to approach or move away from the guide block is provided on the side of the top block away from the guide block, and as the guide block moves, the distance L between the contact point between the top block and the guide block and the roller gradually increases or decreases. The pressure mechanism is symmetrically arranged at both ends of the first pressure roller and the second pressure roller, and the sixth driving members at both ends of the first pressure roller and the second pressure roller work synchronously; then, the pressure applied to the reflective film is controlled by limiting the distance between the first pressure roller and the second pressure roller through the cooperation of the top block and the guide block, and the pressure is controlled by controlling the position of the guide block, so that the control is more precise; the position of the first pressure roller remains unchanged, and the distance moved by the second pressure roller to the first pressure roller is limited by the movement of the guide block. When working, the guide block is first moved to an appropriate position , and then the sixth driving member drives the top block to move toward the guide block until the top block abuts against the guide block. The operation is simple and the stability is high. And by setting the inclination angle of the inclined surface of the guide block facing the top block, for example, the larger the inclination angle, the greater the change in the distance between the moving contact point of the guide block and the first pressure roller, and the pressure control range of the second pressure roller is larger but the control accuracy will be lower; the smaller the inclination angle, the smaller the change in the distance between the moving contact point of the guide block and the first pressure roller, and the pressure control range of the second pressure roller is smaller but the control accuracy is higher.
[0022] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:
[0023] The present invention controls the laser head through multiple axes, with higher control accuracy; the laser and the reflective film are allowed to form an inclination angle in the longitudinal direction through the rotatable laser head, and the laser and the reflective film are allowed to form an inclination angle in the transverse direction through the rotatable printing platform, thereby realizing full-angle printing of anti-counterfeiting marks, with higher applicability and the ability to meet stringent production needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0025] Figure 2 It is a schematic diagram of the installation structure of the printing support and the printing module of the present invention.
[0026] Figure 3 It is a schematic diagram of the connection structure of the deviation adjustment base and the deviation adjustment bracket of the present invention.
[0027] Figure 4It is a structural schematic diagram of the tensioning mechanism of the present invention.
[0028] Figure 5 It is a structural schematic diagram of the lower end of the feeding mounting frame of the present invention.
[0029] Figure 6 It is a schematic diagram of the overall structure of the printing platform of the present invention.
[0030] Figure 7 It is a cross-sectional view of the printing platform of the present invention.
[0031] Figure 8 It is a schematic structural diagram of a pointer and an angle scale of the present invention.
[0032] Fig. 9 It is a schematic diagram of the connection structure of the helical gear and the driving rod of the present invention.
[0033] Fig.10 It is a structural schematic diagram of the pressurizing mechanism of the present invention.
[0034] Fig.11 It is a top view of the pressurizing mechanism of the present invention.
[0035] In the figure, 10, frame; 11, feed barrel; 12, feed mounting frame; 121, roller; 122, limit plate; 123, limit column; 124, fourth driving member; 13, coil barrel; 2, printing platform; 21, table; 211, air suction hole; 22, air suction duct; 23, air suction fan; 24, rotating shaft; 25, frame; 26, bevel gear; 27, drive rod; 271, bevel thread; 272, bearing seat; 273, connecting rod; 274, seventh driving member; 28, pointer; 29, angle scale; 3, printing support; 31, lifting platform; 311, second slider; 312, screw nut; 32, mounting seat; 321, second slide rail; 322, second rack; 323, third slide rail; 324, transverse screw rod; 325, second handle; 33, mounting plate; 331, first slide rail; 332, first rack; 333, second gear; 334, second driving member; 34, transverse plate; 341, lock buckle; 342, first gear; 343, first handle; 35, vertical plate; 351, positioning hole; 36, laser head; 361, connecting shaft; 362, first slider; 4, deviation adjustment mechanism; 41, deviation adjustment base; 411, first deviation adjustment roller; 42, deviation adjustment bracket; 421, second deviation adjustment roller; 43, deviation adjustment shaft; 44, fifth driving member; 45, second deviation adjustment sensor; 46, first deviation adjustment sensor; 47, connecting plate; 48, guide rod; 49 , guide plate; 491, guide groove; 5, tensioning mechanism; 51, support plate; 52, hinge shaft; 53, first tensioning roller; 54, second tensioning roller; 55, third tensioning roller; 56, third driving member; 57, pressure detection roller; 58, pressure sensor; 6, pressurizing mechanism; 61, first pressurizing roller; 62, second pressurizing roller; 63, roller fixing frame; 64, mounting frame; 65, top block; 66, guide block; 67, sixth driving member. DETAILED DESCRIPTION
[0036] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1 —:
[0037] The printing device of the anti-counterfeiting mark of the reflective film includes a feeding drum 11, a frame 10 and a winding drum 13 which are arranged in sequence from front to back. A printing platform 2 is arranged in the middle of the frame 10, and printing brackets 3 are symmetrically arranged on the front and rear sides of the printing platform 2. A deviation adjustment mechanism 4 and a tensioning mechanism 5 are arranged on the frame 10 between the printing bracket 3 and the feeding drum 11, and a tensioning mechanism 5 is arranged on the frame 10 between the printing bracket 3 and the winding drum 13. A lifting platform 31 which can move up and down in a vertical direction is arranged on the printing bracket 3, a mounting seat 32 which can move in a horizontal direction is arranged on the lifting platform 31, a mounting plate 33 which can move in a longitudinal direction is arranged on the mounting seat 32, and printing modules for printing anti-counterfeiting marks are arranged at intervals in the longitudinal direction on the mounting plate 33. The present invention controls the vertical position of the printing module by controlling the up and down movement of the lifting platform 31, controls the lateral position of the printing module by controlling the lateral movement of the mounting seat 32, and controls the longitudinal position of the printing module by controlling the longitudinal movement of the mounting plate 33, so that the printing module can reach any required position, the control is more precise, and the needs of printing various reflective film anti-counterfeiting labels are met, with higher adaptability.
[0038] like Figure 2 As shown, the printing module includes a horizontal plate 34, a vertical plate 35 and a laser head 36. The inner end of the horizontal plate 34 is vertically fixed to the lower end of the vertical plate 35. The upper side surface of the mounting plate 33 is provided with a first slide rail 331 in the longitudinal direction. The horizontal plate 34 is slidably connected to the first slide rail 331. The outer end of the horizontal plate 34 is provided with a lock 341 capable of fixing the horizontal plate 34 and the mounting plate 33. The laser head 36 is connected to the inner side surface of the vertical plate 35 through a horizontally arranged connecting shaft 361, and the laser head 36 can rotate around the connecting shaft 361. The above-mentioned rotatable laser head 36 can make the laser beam form an inclination angle with the reflective film in the longitudinal direction, which is convenient for printing anti-counterfeiting marks, such as anti-counterfeiting marks that cannot be displayed when viewed from the front and can only be seen when tilted in the longitudinal direction. In addition, through the slidable connection between the horizontal plate 34 and the mounting plate 33 and the lock 341, each laser head 36 can be fixed in a corresponding position, which is conducive to improving stability.
[0039] Furthermore, there are two first slide rails 331 and they are symmetrically arranged on the mounting plate 33. A parallel first rack 332 is arranged between the two first slide rails 331. A first gear 342 meshing with the first rack 332 is arranged on the lower side of the horizontal plate 34. A first handle 343 driving the first gear 342 to rotate is arranged on the upper side of the horizontal plate 34. Positioning holes 351 are arranged at intervals along the vertical direction on the vertical plate 35. The inner end of the connecting shaft 361 is fixed to the first slider 362. The first slider 362 is fixedly connected to the positioning hole 351 by a fastener. The first slider 362 and the positioning hole 351 cooperate to adjust the vertical height of the laser head 36, so that the printing device has better adaptability. Two front-to-rear symmetrical second rails 321 are longitudinally provided on the upper surface of the mounting seat 32, a parallel second rack 322 is provided between the two second rails 321, a second gear 333 rotatably meshed with the second rack 322 is rotatably provided on the lower end surface of the mounting plate 33, and a second driving member 334 for driving the second gear 333 to rotate is provided on the upper end surface of the mounting plate 33; a third rail 323 and a transverse screw rod 324 are transversely provided on the lower side surface of the mounting seat 32, a second slider 311 cooperating with the third rail 323 and a screw nut 312 cooperating with the screw rod are fixed on the lifting platform 31, and a second handle 325 for driving the transverse screw rod 324 to rotate is provided at one end of the transverse screw rod 324.
[0040] like Figure 4 As shown, the tensioning mechanism 5 includes two support plates 51 arranged in parallel, one end of the support plate 51 is rotatably connected to the frame 10 through a hinge shaft 52 penetrating the two support plates 51, the other end of the support plate 51 is provided with a first tensioning roller 53 and a second tensioning roller 54 spaced apart along the length direction of the support plate 51, a third tensioning roller 55 rotatably connected to the frame 10 is provided above the other end of the support plate 51, the third tensioning roller 55 is laterally located between the first tensioning roller 53 and the second tensioning roller 54, the other ends of the two support plates 51 rotate downward around the hinge shaft 52 to tension the reflective film; a third driving member 56 is provided on the frame 10, which can drive the other end of the support plate 51 to rotate up and down around the hinge shaft 52; pressure detection rollers 57 are respectively provided at the front and rear ends of the frame 10, the left and right ends of the pressure detection roller 57 are rotatably connected to a pressure sensor 58 fixed on the frame 10, and the pressure applied by the reflective film to the pressure detection roller 57 is directed toward the pressure sensor 58. The tensioning mechanism 5 controls the tension of the reflective film by controlling the support plate 51 to rotate around the hinge shaft 52, and adjusts the tensioning mechanism 5 in real time through feedback from the pressure detection roller 57 arranged in front and behind the frame 10, so that the reflective film is always at an appropriate tension during the entire printing process, which is beneficial to improving the stability and safety of printing.
[0041] like Figure 1 and Figure 5As shown, the feed barrel 11 is rotatably mounted on the feed mounting frame 12, a first deviation adjustment sensor 46 is provided between the feed mounting frame 12 and the front end of the frame 10, rollers 121 are provided at the four corners of the bottom of the feed mounting frame 12, a limit plate 122 cooperating with the roller 121 is provided at the lower side of the roller 121, and limit columns 123 are fixed on the left and right sides of the limit plate 122, and a fourth driving member 124 for driving the feed mounting frame 12 to roll left and right is provided in the middle of the bottom of the feed mounting frame 12. The fourth driving member 124 is a cylinder or a hydraulic cylinder; the first deviation adjustment sensor 46 first detects the position of the reflective film just coming out of the feed barrel 11, and then drives the feed mounting frame 12 to move longitudinally through the fourth driving member 124, thereby adjusting the position of the feed barrel 11 to avoid the position deviation of the reflective film coming out of the feed barrel 11.
[0042] like Figure 3 As shown, a deflection adjustment base 41 is provided on the frame 10 between the printing support 3 and the feeding cylinder 11, and a first deflection adjustment roller 411 is provided on the front and rear sides of the upper end surface of the deflection adjustment base 41, and a deflection adjustment bracket 42 is provided above the deflection adjustment base 41, and a second deflection adjustment roller 421 is provided on the front and rear sides of the deflection adjustment bracket 42, and a vertically arranged deflection adjustment shaft 43 is connected between the deflection adjustment bracket 42 and the deflection adjustment base 41, and a fifth driving member 44 capable of driving the deflection adjustment bracket 42 to rotate around the deflection adjustment shaft 43 is provided on the deflection adjustment base 41, and a second deflection adjustment sensor 45 is provided between the first deflection adjustment roller 411 and the second deflection adjustment roller 421. The present invention can adjust the position of the reflective film by driving the deflection adjustment bracket 42 to rotate around the deflection adjustment shaft 43 by the fifth driving member 44, so as to achieve the purpose of deflection adjustment; wherein when the fifth driving member 44 drives the right end of the deflection adjustment bracket 42 to rotate forward, the reflective film will deviate to the right side; when the fifth driving member 44 drives the right end of the deflection adjustment bracket 42 to rotate backward, the reflective film will deviate to the left side.
[0043] Furthermore, the fifth driving member 44 is a hydraulic cylinder, and the main body of the fifth driving member 44 can be horizontally rotated and is arranged in the middle of the deviation adjusting base 41. The piston rod of the fifth driving member 44 is connected to the left side of the rear end of the deviation adjusting bracket 42, and the deviation adjusting shaft 43 is arranged on the left side of the front end of the deviation adjusting bracket 42; an L-shaped connecting plate 47 is fixed to the right side of the rear end of the deviation adjusting bracket 42, and a guide rod 48 is fixed to the vertical part of the connecting plate 47. A guide plate 49 is fixed on the deviation adjusting base 41, and an arc-shaped guide groove 491 is provided on the side wall of the guide plate 49, and the center of the guide groove 491 is located on the central axis of the deviation adjusting shaft 43. The guide rod 48 is placed in the guide groove 491 and can slide along the guide groove 491.
[0044] like Figure 6-8As shown, the table 21 at the upper end of the printing platform 2 is evenly distributed with suction holes 211, and each suction hole 211 is connected to the suction fan 23 through the suction duct 22. The left and right ends of the printing platform 2 are rotatably connected to the frame 25 through the coaxially arranged rotating shaft 24, and a coaxial bevel gear 26 is fixed on one of the rotating shafts 24, and a driving rod 27 is rotatably fixed on the frame 25. The driving rod 27 is formed with a bevel thread 271 that meshes with the bevel gear 26, and the helix angle β of the bevel gear 26 ranges from 2° to 10°. The rotation of the printing platform 2 in the present invention can make the laser emitted by the laser head 36 and the reflective film form an inclination angle in the horizontal direction. With the rotatable laser head 36, the inclination angle of the laser head 36 and the reflective film can be controlled, for example, the printed anti-counterfeiting mark can only be seen when it is at the left rear and at an angle of 45 degrees with the reflective film, etc., and the reflective film can also be printed multiple times by laser beams at multiple angles, so as to achieve multiple anti-counterfeiting marks, and the printing is more stable and more applicable.
[0045] Furthermore, bearings are sleeved on both ends of the driving rod 27, and each bearing is fixedly connected to the frame 25 through a bearing seat 272. An oblique thread 271 is formed on the driving rod 27 between the two bearings; one end of the driving rod 27 extends from the corresponding bearing and is fixedly connected to one end of a connecting rod 273, and the other end of the connecting rod 273 is connected to a seventh driving member 274; the outer end of the rotating shaft 24 fixedly connected to the bevel gear 26 extends out of the frame 25, and a pointer 28 that can rotate with the rotating shaft 24 is fixed on the outer end of the rotating shaft 24, and an angle scale 29 that cooperates with the pointer 28 is fixed on the outer surface of the frame 25. The angle scale 29 cooperates with the pointer 28 to indicate the inclination angle of the table 21 relative to the horizontal plane. The printing platform 2 drives the bevel gear 26 to rotate by meshing the bevel gear 26 with the bevel thread 271, thereby driving the rotation of the printing platform 2, and because the helix angle β of the bevel gear 26 is between 2° and 10°, each rotation of the drive rod 27 can only drive the bevel gear 26 to rotate at a small angle, thereby improving the accuracy of controlling the printing platform 2; at the same time, the printing platform 2 has a driving force to restore the horizontal under the action of gravity, and the driving force acts on the bevel thread 271 of the drive rod 27 through the bevel gear 26. Since the β angle is small, the force in the driving force that can cause the drive rod 27 to move in the opposite direction is much smaller than the pressure acting on the axial direction of the drive rod 27, thereby causing the friction between the drive rod 27 and the bevel gear 26 to be greater than the force causing the drive rod 27 to reverse, thereby ensuring the stability of the printing platform 2 after rotation and preventing the printing platform 2 from automatically reversing.
[0046] like Fig.10 and Fig.11As shown, at least one pressure mechanism 6 is provided on the frame 10, and the pressure mechanism 6 includes a first pressure roller 61 and a second pressure roller 62 fixed thereto. The first pressure roller 61 is fixedly connected to the frame 10 via a roller fixing frame 63, and a mounting frame 64 and a top block 65 are provided on one side of the roller fixing frame 63. The mounting frame 64 is located between the roller fixing frame 63 and the top block 65, and a guide block 66 cooperating with the top block 65 is movably provided on the side of the mounting frame 64 facing the top block 65, and a sixth driving member 67 for driving the top block 65 to approach or move away from the guide block 66 is provided on the side of the top block 65 away from the guide block 66. As the guide block 66 moves, the distance L between the contact point between the top block 65 and the guide block 66 and the roller gradually increases or decreases. The pressure mechanism 6 is symmetrically arranged at both ends of the first pressure roller 61 and the second pressure roller 62, and the sixth driving members 67 at both ends of the first pressure roller 61 and the second pressure roller 62 work synchronously; then, the top block 65 and the guide block 66 cooperate to control the pressure applied to the reflective film by limiting the distance between the first pressure roller 61 and the second pressure roller 62, and the pressure is controlled by controlling the position of the guide block 66, so that the control is more precise; the position of the first pressure roller 61 remains unchanged, and the movement of the guide block 66 is used to limit the distance that the second pressure roller 62 moves toward the first pressure roller 61. When working, first move the guide block 66 to an appropriate position. When the position is reached, the sixth driving member 67 drives the top block 65 to move toward the guide block 66 until the top block 65 abuts against the guide block 66. The operation is simple and the stability is high. The inclination angle of the inclined surface of the guide block 66 facing the top block 65 is set. For example, the larger the inclination angle, the greater the change in the distance between the moving contact point of the guide block 66 and the first pressure roller 61, and the pressure control range of the second pressure roller 62 is larger but the control accuracy is lower. The smaller the inclination angle, the smaller the change in the distance between the moving contact point of the guide block 66 and the first pressure roller 61, and the pressure control range of the second pressure roller 62 is smaller but the control accuracy is higher.
[0047] The present invention controls the laser head 36 through multiple axes, with higher control accuracy; the rotatable laser head 36 is used to make the laser and the reflective film form an inclination angle in the longitudinal direction, and the rotatable printing platform 2 is used to make the laser and the reflective film form an inclination angle in the transverse direction, thereby realizing full-angle printing of anti-counterfeiting marks, which has higher applicability and can meet strict production needs.
[0048] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A printing device for anti-counterfeiting mark of reflective film, characterized by: The invention comprises a feeding drum (11), a frame (10) and a winding drum (13) which are arranged in sequence from front to back, wherein a printing platform (2) is arranged in the middle of the frame (10), printing brackets (3) are symmetrically arranged on the front and rear sides of the printing platform (2), a deviation adjustment mechanism (4) and a tensioning mechanism (5) are arranged on the frame (10) between the printing bracket (3) and the feeding drum (11), a tensioning mechanism (5) is arranged on the frame (10) between the printing bracket (3) and the winding drum (13), a lifting platform (31) which can move up and down in a vertical direction is arranged on the printing bracket (3), a mounting seat (32) which can move in a horizontal direction is arranged on the lifting platform (31), a mounting plate (33) which can move in a longitudinal direction is arranged on the mounting seat (32), and printing modules for printing anti-counterfeiting marks are arranged at intervals in the longitudinal direction on the mounting plate (33); The printing module comprises a horizontal plate (34), a vertical plate (35) and a laser head (36); the inner end of the horizontal plate (34) is vertically fixed to the lower end of the vertical plate (35); the upper side surface of the mounting plate (33) is provided with a first slide rail (331) in the longitudinal direction; the horizontal plate (34) and the first slide rail (331) are slidably connected; the outer end of the horizontal plate (34) is provided with a lock (341) capable of fixing the horizontal plate (34) and the mounting plate (33); the laser head (36) is connected to the inner side surface of the vertical plate (35) via a horizontally arranged connecting shaft (361); the laser head (36) is capable of rotating around the connecting shaft (361); Positioning holes (351) are arranged at intervals along the vertical direction on the vertical plate (35); the inner end of the connecting shaft (361) is fixed to the first sliding block (362); and the first sliding block (362) is fixedly connected to the positioning hole (351) via a fastener; There are two first slide rails (331) which are symmetrically arranged on the mounting plate (33) in a front-to-back manner; a parallel first rack (332) is arranged between the two first slide rails (331); a first gear (342) meshing with the first rack (332) is arranged on the lower side of the transverse plate (34); and a first handle (343) for driving the first gear (342) to rotate is arranged on the upper side of the transverse plate (34); The upper surface of the mounting seat (32) is longitudinally provided with two second slide rails (321) symmetrical in front and back, a parallel second rack (322) is provided between the two second slide rails (321), a second gear (333) meshing with the second rack (322) is rotatably provided on the lower end surface of the mounting plate (33), and a second driving member (334) for driving the second gear (333) to rotate is provided on the upper end surface of the mounting plate (33); a third slide rail (323) and a transverse screw rod (324) are transversely provided on the lower side surface of the mounting seat (32), a second slider (311) cooperating with the third slide rail (323) and a screw rod nut (312) cooperating with the screw rod are fixed on the lifting platform (31), and a second handle (325) for driving the transverse screw rod (324) to rotate is provided at one end of the transverse screw rod (324); The table top (21) at the upper end of the printing platform (2) is evenly distributed with air suction holes (211), each of which is connected to a suction fan (23) via an air suction duct (22). The left and right ends of the printing platform (2) are rotatably connected to a frame (25) via coaxially arranged rotating shafts (24), one of which is fixed with a coaxial bevel gear (26). A driving rod (27) is rotatably fixed to the frame (25), the driving rod (27) being formed with a bevel thread (271) meshing with the bevel gear (26), the helix angle β of the bevel gear (26) being in the range of 2°-10°; both ends of the driving rod (27) are sleeved with bearings, each bearing being connected to the frame via a bearing seat (272). The frame (25) is fixedly connected to the frame (25), the oblique thread (271) is formed on the driving rod (27) between the two bearings; one end of the driving rod (27) extends from the corresponding bearing and is fixedly connected to one end of the connecting rod (273), and the other end of the connecting rod (273) is connected to a seventh driving member (274); the outer end of the rotating shaft (24) fixedly connected to the bevel gear (26) extends out of the frame (25), a pointer (28) capable of rotating with the rotating shaft (24) is fixed on the outer end of the rotating shaft (24), and an angle scale (29) cooperating with the pointer (28) is fixed on the outer surface of the frame (25), and the angle scale (29) cooperating with the pointer (28) can indicate the inclination angle of the table top (21) relative to the horizontal plane.
2. The printing device of the anti-counterfeiting mark of the reflective film according to claim 1, characterized in that: The tensioning mechanism (5) comprises two support plates (51) arranged in parallel, one end of the support plate (51) is rotatably connected to the frame (10) via a hinge shaft (52) penetrating the two support plates (51), the other end of the support plate (51) is provided with a first tensioning roller (53) and a second tensioning roller (54) spaced apart along the length direction of the support plate (51), a third tensioning roller (55) rotatably connected to the frame (10) is provided above the other end of the support plate (51), the third tensioning roller (55) is located between the first tensioning roller (53) and the second tensioning roller (54) in the transverse direction, the other ends of the two support plates (51) rotate downward around the hinge shaft (52) to tension the reflective film; the frame (10) is provided with a third driving member (56) capable of driving the other end of the support plate (51) to rotate up and down around the hinge shaft (52).
3. The printing device of the anti-counterfeiting mark of the reflective film according to claim 1, characterized in that: The feeding cylinder (11) is rotatably mounted on the feeding mounting frame (12); a first deviation adjustment sensor (46) is arranged between the front end of the feeding mounting frame (12) and the frame (10); rollers (121) are arranged at four corners of the bottom of the feeding mounting frame (12); a limit plate (122) cooperating with the roller (121) is arranged at the lower side of the roller (121); limit columns (123) are fixed on the left and right sides of the limit plate (122); and a fourth driving member (124) for driving the feeding mounting frame (12) to roll left and right is arranged in the middle of the bottom of the feeding mounting frame (12).
4. The printing device for anti-counterfeiting mark of reflective film according to claim 1, characterized in that: A deviation adjustment base (41) is provided on the frame (10) between the printing support (3) and the feeding cylinder (11), and first deviation adjustment rollers (411) are provided on the front and rear sides of the upper end surface of the deviation adjustment base (41), and a deviation adjustment bracket (42) is provided above the deviation adjustment base (41), and second deviation adjustment rollers (421) are provided on the front and rear sides of the deviation adjustment bracket (42), and a vertical deviation adjustment shaft (43) is connected between the deviation adjustment bracket (42) and the deviation adjustment base (41), and a fifth driving member (44) is provided on the deviation adjustment base (41) for driving the deviation adjustment bracket (42) to rotate around the deviation adjustment shaft (43), and a second deviation adjustment sensor (45) is provided between the first deviation adjustment roller (411) and the second deviation adjustment roller (421); The main body of the component (44) can be horizontally rotated and is arranged in the middle of the deviation adjustment base (41); the piston rod of the fifth driving component (44) is connected to the left side of the rear end of the deviation adjustment bracket (42); the deviation adjustment shaft (43) is arranged on the left side of the front end of the deviation adjustment bracket (42); an L-shaped connecting plate (47) is fixed to the right side of the rear end of the deviation adjustment bracket (42); a guide rod (48) is fixed to the vertical part of the connecting plate (47); a guide plate (49) is fixed to the deviation adjustment base (41); an arc-shaped guide groove (491) is arranged on the side wall of the guide plate (49); the center of the guide groove (491) is located on the central axis of the deviation adjustment shaft (43); the guide rod (48) is placed in the guide groove (491) and can slide along the guide groove (491).
5. The printing device of the anti-counterfeiting mark of the reflective film according to claim 1, characterized in that: At least one pressure mechanism (6) is provided on the frame (10), the pressure mechanism (6) comprising a first pressure roller (61) and a second pressure roller (62) fixed thereto, the first pressure roller (61) being fixedly connected to the frame (10) via a roller fixing frame (63), a mounting frame (64) and a top block (65) being provided on one side of the roller fixing frame (63), the mounting frame (64) being located between the roller fixing frame (63) and the top block (65), and a guide block (66) cooperating with the top block (65) being movably provided on a side of the mounting frame (64) facing the top block (65), and a sixth driving member (67) for driving the top block (65) to approach or move away from the guide block (66), and as the guide block (66) moves, the distance between the contact point between the top block (65) and the guide block (66) and the roller gradually increases or decreases.