Winding and unwinding device of silk-screen cold ironing machine

Abstract

The invention relates to the field of winding and unwinding of cold ironing machines, and provides a winding and unwinding device of a silk-screen cold ironing machine, which comprises a rack, an unwinding assembly, a winding assembly and an adjusting assembly, the unwinding assembly comprises a main unwinding roller, an auxiliary unwinding roller, a first motor and a second motor. The main unwinding rollers are connected with the first motors in a one-to-one correspondence manner; the auxiliary unwinding rollers are connected with the second motors in a one-to-one correspondence mode. The winding assembly comprises a main winding roller, an auxiliary winding roller, a third motor and a fourth motor. The main winding rollers are connected with the third motors in a one-to-one correspondence manner; the auxiliary winding rollers are connected with the fourth motors in a one-to-one correspondence mode. The adjusting assembly comprises a detection unit, a first adjusting driving unit and a push plate; the detection unit is used for detecting the position of a cold stamping film roll on the main unwinding roller and / or the main winding roller; the push plate is used for pushing the cold stamping film rolls on the auxiliary unwinding roller and the auxiliary winding roller to move. The problem that due to the fact that a single cold stamping film is adopted and installation deviation of the cold stamping film is adopted, waste of the cold stamping film is serious is solved.

Description

Technical Field

[0001] This application relates to the field of cold foil stamping machine winding and unwinding, and more particularly to a winding and unwinding device for a screen printing cold foil stamping machine. Background Technology

[0002] Screen printing cold foil stamping technology occupies an important position in the printing industry. With the market's increasing demands for printing quality and production efficiency, performance optimization of screen printing cold foil stamping machines has become a key direction for industry development.

[0003] In terms of the unwinding and rewinding operations of screen printing cold foil stamping machines, the traditional approach is to use a relatively simple unwinding and rewinding roller structure. Usually, only one unwinding roller and one rewinding roller are provided. The unwinding roller is responsible for releasing the cold foil stamping film, which has a metal layer. When the cold foil stamping film comes into contact with the substrate with a special adhesive, the metal layer can adhere to the substrate to form a pattern. The used cold foil stamping film is then wound up by the rewinding roller.

[0004] However, the types of patterns that need to be hot-stamped are diverse. If a single take-up and untake-up roller is always used, it is easy to waste cold foil. In addition, the installation and positioning of the cold foil roll on the take-up and untake-up roller is also an issue that needs to be addressed. If it is not installed in the predetermined position, the movement direction of the cold foil may deviate, resulting in unqualified hot-stamping quality and wasting the cold foil. Summary of the Invention

[0005] To address the problem of significant waste in cold foil printing, this application provides a winding and unwinding device for a screen printing cold foil printing machine.

[0006] The winding and unwinding device of the screen printing cold foil stamping machine provided in this application adopts the following technical solution: A winding and unwinding device for a screen printing cold foil stamping machine includes: frame; The unwinding assembly includes a main unwinding roll, an auxiliary unwinding roll, a first motor, and a second motor; both the main unwinding roll and the auxiliary unwinding roll are rotatably mounted on the frame; the main unwinding roll is connected to the first motor in a one-to-one correspondence; and the auxiliary unwinding roll is connected to the second motor in a one-to-one correspondence. The winding assembly includes a main winding roller, an auxiliary winding roller, a third motor, and a fourth motor; both the main winding roller and the auxiliary winding roller are rotatably mounted on the frame; the main winding roller is connected to the third motor in a one-to-one correspondence; and the auxiliary winding roller is connected to the fourth motor in a one-to-one correspondence. The adjustment assembly includes a detection unit, a first adjustment drive unit, and a push plate; the detection unit is used to detect the position of the cold-pressed film roll on the main unwinding roller and / or the main take-up roller; the push plate is perpendicular to the auxiliary unwinding roller and the auxiliary take-up roller, and the push plate is slidably connected to the auxiliary unwinding roller and the auxiliary take-up roller; the first adjustment drive unit is connected to the push plate and is used to drive the push plate to move the cold-pressed film roll on the auxiliary unwinding roller and the auxiliary take-up roller and change its installation position.

[0007] By adopting the above technical solution, the unwinding assembly is equipped with a main unwinding roller and an auxiliary unwinding roller, and the winding assembly is equipped with a main winding roller and an auxiliary winding roller. This enables the simultaneous unwinding and winding of multiple rolls of cold foil. By reasonably adjusting the spacing between multiple rolls of cold foil and completing the cold foiling of a pattern together, the amount of cold foil used can be greatly reduced. Each roller is driven by an independent motor, which can eliminate the problem of stretching deformation of the cold foil caused by the difference in rotational inertia of multiple rolls of cold foil. The detection unit can detect the position of the cold foil rolls on the main unwinding roller and / or the main winding roller, so that the push plate can push the cold foil on the auxiliary unwinding roller and the auxiliary winding roller to move and achieve rapid positioning.

[0008] Optionally, the unwinding assembly further includes two first mounting seats, which are disposed on the frame and have slots. The two ends of the main unwinding roller are respectively engaged in the slots of the two first mounting seats. A limit ring is hinged on the first mounting seat, which is used to move relative to the first mounting seat to open or close the slot.

[0009] By adopting the above technical solution, the main unwinding roller can be quickly positioned and installed using the slot of the first mounting base, which facilitates the installation operation of the main unwinding roller on the frame and also facilitates the replacement of the cold foil roll on the main unwinding roller; the limiting ring can move relative to the first mounting base to open or close the slot opening. When closed, it can prevent the main unwinding roller from coming out of the slot, ensuring the stability and reliability of the main unwinding roller installation, and helping the main unwinding roller to rotate stably to achieve the unwinding function.

[0010] Optionally, the first mounting base is provided with a first threaded hole, and the limiting ring is provided with a second threaded hole, with the first threaded hole and the second threaded hole corresponding one-to-one; When the limiting ring closes the slot of the card slot, the first threaded hole and the corresponding second threaded hole are coaxially connected.

[0011] By adopting the above technical solution, after the main unwinding roll is inserted into the slot of the first mounting seat at both ends, the limiting ring can be fixed on the first mounting seat by using bolts passing through the first threaded hole and the second threaded hole that are coaxially connected to seal the slot opening, thereby preventing the main unwinding roll from coming out of the slot and improving the stability of the main unwinding roll installation.

[0012] Optionally, both the secondary unwind roll and the secondary take-up roll are pneumatic rolls.

[0013] By adopting the above technical solution, the auxiliary unwinding roller and auxiliary winding roller are made of inflatable rollers, and the diameter of the rollers can be adjusted as needed, which facilitates the installation and disassembly of the cold foil roll and improves the convenience of the unwinding and winding operation.

[0014] Optionally, the unwinding assembly further includes a roll changing drive unit, a sleeve, and two second mounting seats, the second mounting seats being slidably disposed on the frame; The number of auxiliary unwinding rollers and auxiliary winding rollers are both two; the two auxiliary unwinding rollers are coaxially arranged, and the ends of the two auxiliary unwinding rollers that are far apart from each other are rotatably connected to the second mounting base, while the ends of the two auxiliary unwinding rollers that are close to each other are rotatably connected to the sleeve. The sleeve is configured to move along the axial direction of the auxiliary unwinding roll to disengage from the auxiliary unwinding roll; The roll changing drive unit is connected to the second mounting base and is used to drive the second mounting base to move in a direction perpendicular to the axis of the auxiliary unwinding roll.

[0015] By adopting the above technical solution, the setting of two auxiliary unwinding rollers and auxiliary take-up rollers can realize more unwinding operations of cold foil; the sleeve is rotatably connected to the auxiliary unwinding roller and can move and disengage along the axial direction, which facilitates the replacement of cold foil rolls; the roll changing drive unit drives the second mounting base to move in a direction perpendicular to the axis of the auxiliary unwinding roller, which can realize the position adjustment of the auxiliary unwinding roller and assist in the replacement of cold foil rolls.

[0016] Optionally, the winding and unwinding device of the screen printing cold ironing machine further includes a support member for supporting the sleeve.

[0017] By adopting the above technical solution, a support sleeve is installed in the winding and unwinding device of the screen printing cold foil stamping machine, which can ensure the stability of the sleeve, prevent the sleeve from falling, and ensure the normal operation of the device.

[0018] Optionally, the number of the adjustment components is two, and the two adjustment components correspond one-to-one with the two auxiliary unwinding rollers; The auxiliary unwinding roller includes a central shaft and a roller body sleeved on the central shaft, the roller body being used to mount the cold ironing film roll; The pusher plate is located on the side of the corresponding auxiliary unwinding roller where the cold foil faces the other auxiliary unwinding roller. During unwinding, the pusher plate is located at the end of the roller body of the corresponding auxiliary unwinding roller that is close to the other auxiliary unwinding roller. The pusher plate is provided with a limiting hole for the corresponding auxiliary unwinding roller to pass through.

[0019] By adopting the above technical solution, two adjustment components are set up to correspond to the two auxiliary unwinding rollers respectively, which can independently adjust the position of the cold foil roll on the two auxiliary unwinding rollers, thereby improving the accuracy and flexibility of adjustment; the push plate is located on the side of the auxiliary unwinding roller where the cold foil is facing the other auxiliary unwinding roller and is located at the end of the auxiliary unwinding roller close to the other auxiliary unwinding roller during unwinding, and the push plate is provided with a limiting hole to facilitate limiting the auxiliary unwinding roller and prevent the auxiliary unwinding roller from shaking.

[0020] Optionally, a mating bearing is provided in the limiting hole, and when the auxiliary unwinding roller expands, the auxiliary unwinding roller abuts against the inner ring of the corresponding mating bearing.

[0021] By adopting the above technical solution, a docking bearing is set in the limiting hole. When the auxiliary unwinding roller is not expanded, the push plate can move freely to adjust the installation position of the cold foil roll. When the auxiliary unwinding roller expands, the auxiliary unwinding roller abuts against the inner ring of the docking bearing, so that the auxiliary unwinding roller can rotate smoothly. At the same time, the push plate can better limit the auxiliary unwinding roller and prevent the auxiliary unwinding roller from shaking.

[0022] Optionally, the adjusting assembly further includes a push block, which is disposed on the side of the push plate near the sleeve, and the push block is used to push the sleeve to move along the axial direction of the auxiliary unwinding roller; The end face of the roller body is provided with a clearance groove, which is used to avoid the sleeve; The clearance groove is configured such that when the pusher pushes the sleeve into the clearance groove of one of the auxiliary unwinding rollers, the pusher plate disengages from the other auxiliary unwinding roller.

[0023] By adopting the above technical solution, the pusher block is located on the side of the pusher plate near the sleeve, which can push the sleeve to move along the axis of the auxiliary unwinding roller. This facilitates the adjustment of the sleeve position so that the auxiliary unwinding roller can be connected or disconnected from the sleeve, thereby assisting in the installation and roll changing of the cold foil roll. The setting of the clearance groove allows the sleeve to move a larger stroke, ensuring that the pusher plate can move to disconnect from the auxiliary unwinding roller.

[0024] Optionally, the sleeve is provided with a limiting part, and the limiting part corresponds one-to-one with the push block; the push block is slidably connected to the push plate; The adjustment assembly further includes a second adjustment drive unit, which is disposed on the push plate and connected to the push block. The second adjustment drive unit and the push block are configured such that when the push plate is located at one end of the corresponding auxiliary unwinding roller near the other auxiliary unwinding roller, the second adjustment drive unit drives the push block away from the sleeve or engages with the corresponding limiting part for limiting.

[0025] By adopting the above technical solution, when the pusher plate is located at the end of the corresponding auxiliary unwinding roller close to another auxiliary unwinding roller, the second adjustment drive unit can be used to drive the push block away from the sleeve or cooperate with the limiting part to achieve flexible control of the position relationship between the sleeve and the pusher plate. This helps to limit the sleeve during the winding and unwinding process and prevent the sleeve from moving and disengaging from the auxiliary unwinding roller. In addition, when it is necessary to replace the cold foil roll, the pusher plate and the pusher block move to push the sleeve to move, thereby disengaging the sleeve and the pusher plate from the corresponding auxiliary unwinding roller so as to replace the cold foil roll on the auxiliary unwinding roller.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The setup of the main unwinding roller, auxiliary unwinding roller, main take-up roller, and auxiliary take-up roller helps to simultaneously unwind and rewind multiple rolls of cold foil, enabling the hot stamping of patterns through multiple rolls of cold foil, which helps to save cold foil. Each roller is driven by an independent motor, which helps to solve the problem of stretching deformation of cold foil caused by the difference in rotational inertia of multiple rolls of cold foil. 2. The auxiliary unwinding roller can be docked with or disengaged from the sleeve by moving the sleeve. When the auxiliary unwinding roller is disengaged from the sleeve, the roll changing drive unit can drive the auxiliary unwinding roller to move so that one end of the auxiliary unwinding roller is exposed so as to replace the cold foil roll. 3. The detection unit detects the position of the cold foil roll on the main unwinding roller and / or the main take-up roller. The first adjustment drive unit drives the push plate to move the cold foil roll on the auxiliary unwinding roller and the auxiliary take-up roller, which improves the accuracy and efficiency of the cold foil roll position adjustment. During unwinding and take-up, the push plate is located at the end of the auxiliary unwinding roller facing the sleeve. The expanded auxiliary unwinding roller can be connected to the mating bearing on the push plate, thereby enabling the push plate to improve the stability of the end of the auxiliary unwinding roller facing the sleeve. At this time, the push block can limit the sleeve to prevent the sleeve from moving. When it is necessary to replace the cold foil roll, the push block can push the sleeve to move so that the sleeve is disengaged from the corresponding auxiliary unwinding roller. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the winding and unwinding device of the screen printing cold foil stamping machine provided in this application; Figure 2 This application provides Figure 1 Enlarged view of point A in the middle; Figure 3 This is a three-dimensional structural schematic diagram of another embodiment of the winding and unwinding device of the screen printing cold foil stamping machine provided in this application; Figure 4 This application provides Figure 3 Enlarged view of point B in the middle; Figure 5 This is a front view of another embodiment of the winding and unwinding device of the screen printing cold foil stamping machine provided in this application; Figure 6 This application provides Figure 5 Enlarged diagram of point C in the middle.

[0028] Explanation of reference numerals in the attached figures: 1. Rack; 2. Unwinding assembly; 21. Main unwinding roll; 22. Auxiliary unwinding roll; 221. Central shaft; 222. Roll body; 2221. Clearance groove; 23. First motor; 24. Second motor; 25. First mounting base; 251. Slot; 252. Limiting ring; 253. First threaded hole; 254. Second threaded hole; 26. Second mounting base; 27. Sleeve; 271. Limiting part; 3. Rewinding assembly; 31. Main rewinding roll; 32. Auxiliary rewinding roll; 33. Third motor; 34. Fourth motor; 4. Support components; 5. Adjustment assembly; 51. First adjustment drive unit; 52. Push plate; 53. Connecting bearing; 54. Push block; 55. Second adjustment drive unit. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1 to 6 This application will be described in further detail.

[0030] Example 1

[0031] like Figures 1 to 2 As shown in the figure, this application discloses a winding and unwinding device for a screen printing cold ironing machine, including a frame 1, an unwinding assembly 2 and a winding assembly 3.

[0032] The unwinding assembly 2 includes a main unwinding roll 21, an auxiliary unwinding roll 22, a first motor 23, a second motor 24, a first mounting base 25, a second mounting base 26, a roll changing drive unit (not shown in the figure), and a sleeve 27. The main unwinding roll 21 and the auxiliary unwinding roll 22 are both rotatably mounted on the frame 1, and the main unwinding roll 21 and the auxiliary unwinding roll 22 are parallel to each other.

[0033] In this embodiment, there are two first mounting seats 25, which are mounted on the frame 1. Each first mounting seat 25 has a slot 251, and both ends of the main unwinding roller 21 are respectively engaged in the slots 251 of the two first mounting seats 25. A limiting ring 252 is hinged to the first mounting seat 25, and the limiting ring 252 can open or close the slot 251 by moving relative to the first mounting seat 25. With the above configuration, the main unwinding roller 21 can be quickly installed and removed to replace the cold foil roll on the main unwinding roller 21.

[0034] Furthermore, the first mounting base 25 is provided with a first threaded hole 253, and the limiting ring 252 is provided with a second threaded hole 254. The first threaded hole 253 and the second threaded hole 254 correspond one-to-one. When the limiting ring 252 closes the slot of the slot 251, the first threaded hole 253 and the corresponding second threaded hole 254 are coaxially connected. At this time, the limiting ring 252 can be locked by bolts threadedly connecting the first threaded hole 253 and the second threaded hole 254, thus preventing the main unwinding roller 21 from disengaging from the first mounting base 25.

[0035] The main unwinding roller 21 is connected to the first motor 23, and the first motor 23 drives the main unwinding roller 21 to rotate in order to achieve unwinding.

[0036] The auxiliary unwinding roller 22 is connected to the second motor 24 in a one-to-one correspondence. In this embodiment, there are two auxiliary unwinding rollers 22 and two second motors 24. With two auxiliary unwinding rollers 22 and one main unwinding roller 21, up to three rolls of cold-pressed film can be unwound simultaneously. Both the main unwinding roller 21 and the auxiliary unwinding roller 22 can be inflatable rollers. When the cold-pressed film roll is sleeved on the main unwinding roller 21 and the auxiliary unwinding roller 22, the main unwinding roller 21 and the auxiliary unwinding roller 22 can expand to fix the cold-pressed film roll.

[0037] There are two second mounting seats 26, which are slidably mounted on the frame 1. Two auxiliary unwinding rollers 22 are coaxially arranged. The ends of the two auxiliary unwinding rollers 22 that are far apart from each other are rotatably connected to the second mounting seats 26. The ends of the two auxiliary unwinding rollers 22 that are close to each other are provided with bearings and are rotatably connected to the sleeve 27 through the bearings.

[0038] There are two roll-changing drive units, each connected to a corresponding second mounting base 26. The roll-changing drive unit drives the second mounting base 26 to move along a direction perpendicular to the axis of the auxiliary unwinding roll 22. Specifically, the roll-changing drive unit can be a conventional linear drive mechanism such as a cylinder or a motor-screw drive mechanism. The configuration is fairly standard and will not be described in detail.

[0039] The sleeve 27 can move along the axial direction of the auxiliary unwinding roller 22 under the action of external force (e.g., manual force) to disengage from the auxiliary unwinding roller 22. For example, when it is necessary to replace the cold foil roll on the auxiliary unwinding roller 22, the sleeve 27 is moved along the axial direction of the auxiliary unwinding roller 22. The sleeve 27 can approach one of the auxiliary unwinding rollers 22 and move away from the other auxiliary unwinding roller 22, so that the corresponding auxiliary unwinding roller 22 away from the sleeve 27 can disengage from the sleeve 27. Afterward, the roll changing drive unit can drive the corresponding second mounting base 26 to move, so that the end of the corresponding auxiliary unwinding roller 22 close to the sleeve 27 is exposed, so as to replace the cold foil roll.

[0040] Furthermore, the winding and unwinding device of the screen printing cold foil stamping machine also includes a support member 4. The support member 4 is used to support the sleeve 27 to prevent the sleeve 27 from sagging, and can also play a certain limiting role for the sleeve 27. The top surface of the support member 4 is an arc-shaped surface that matches the outer peripheral surface of the sleeve 27.

[0041] The take-up assembly 3 includes a main take-up roller 31, an auxiliary take-up roller 32, a third motor 33, and a fourth motor 34. Both the main take-up roller 31 and the auxiliary take-up roller 32 are rotatably mounted on the frame 1. The main take-up roller 31 is connected to the third motor 33 in a one-to-one correspondence, and the main take-up roller 31 can be configured similarly to the main unwind roller 21. There are two auxiliary take-up rollers 32, and the two auxiliary take-up rollers 32 are coaxially arranged. The auxiliary take-up rollers 32 are connected to the fourth motor 34 in a one-to-one correspondence.

[0042] Furthermore, the winding assembly 3 also includes a first mounting base 25, a second mounting base 26, a roll changing drive unit, and a sleeve 27. The winding assembly 3 can be configured in the same way as the unwinding assembly 2 to enable quick replacement of the cold foil rolls on the main winding roller 31 and the auxiliary winding roller 32.

[0043] Among them, the first motor 23, the second motor 24, the third motor 33 and the fourth motor 34 are all servo motors.

[0044] Traditional cold ironing processes typically use a single cold ironing film to cold iron patterns. However, patterns may be divided into multiple parts, with gaps between each part, and each part may have a different pattern. Using a single cold ironing film would result in waste of the film.

[0045] In this embodiment, by simultaneously unwinding and rewinding multiple cold foil rolls, for example, by appropriately setting the distance between the cold foil roll on the main unwinding roller 21 and the cold foil roll on the auxiliary unwinding roller 22 during unwinding, each cold foil roll is responsible for heat stamping a portion of the pattern, thereby effectively saving the amount of cold foil used. However, since the width of the cold foil in each roll may differ, the quality will also vary. The moment of inertia generated when the cold foil roll rotates will also be different. If a single unwinding roller and a single rewinding roller are used, the tension of the different cold foils will be inconsistent and cannot be kept constant. The unwinding and rewinding step distances will be asynchronous, which can easily lead to stretching deformation and other problems. This embodiment achieves simultaneous unwinding and winding of multiple rolls of cold foil by setting multiple unwinding rollers (main unwinding roller 21 and auxiliary unwinding roller 22) and multiple winding rollers (main winding roller 31 and auxiliary winding roller 32). This not only saves on the amount of cold foil used, but also ensures that each unwinding roller and each winding roller is driven by an independent servo motor. Each servo motor can output appropriate torque according to the actual situation, thereby preventing the problem of cold foil stretching and deformation.

[0046] Example 2

[0047] The difference between this embodiment and embodiment 1 is that the winding and unwinding device of the screen printing cold ironing machine also includes an adjustment component 5.

[0048] In actual cold foil stamping, each roll of cold foil needs to be installed in a preset position to ensure the final stamped pattern is up to standard. This results in repositioning every time the roll of cold foil is changed, and the repositioning process is time-consuming. This embodiment includes an adjustment component 5, which helps to improve the speed of changing and repositioning the cold foil roll.

[0049] like Figures 3 to 4 As shown, specifically, the adjustment assembly 5 includes a detection unit, a first adjustment drive unit 51, and a push plate 52. The detection unit is used to detect the position of the cold-pressed film roll on the main unwinding roller 21 and / or the main take-up roller 31. The detection method is not strictly limited. For example, the detection unit can be an infrared rangefinder, which measures the distance between the cold-pressed film roll on the main unwinding roller 21 and the infrared rangefinder to determine the position of the cold-pressed film roll on the main unwinding roller 21.

[0050] The push plate 52 is perpendicular to the auxiliary unwinding roller 22 and the auxiliary take-up roller 32, and the push plate 52 is slidably connected to the auxiliary unwinding roller 22 and the auxiliary take-up roller 32. The first adjustment drive unit 51 is connected to the push plate 52. After determining the installation position of the cold-pressed film roll on the main unwinding roller 21, the first adjustment drive unit 51 can drive the push plate 52 to move and change the installation position of the cold-pressed film roll on the auxiliary unwinding roller 22 and the auxiliary take-up roller 32, so that the cold-pressed film roll on the auxiliary unwinding roller 22 and the auxiliary take-up roller 32 maintains a suitable distance from the cold-pressed film roll on the main unwinding roller 21 (in the axial direction along the main unwinding roller 21), thereby quickly achieving the positioning of the cold-pressed film roll on the auxiliary unwinding roller 22 and the auxiliary take-up roller 32. After positioning is achieved, the auxiliary unwinding roller 22 and the auxiliary take-up roller 32 can expand to fix the cold-pressed film roll.

[0051] There are two adjusting components 5, each corresponding to one of the two auxiliary unwinding rollers 22. In this embodiment, the connection and cooperation relationship between the adjusting components 5 and the winding components 3 can also be set with reference to the connection and cooperation relationship between the adjusting components 5 and the unwinding components 2. The connection and cooperation relationship between the adjusting components 5 and the unwinding components 2 will be described below.

[0052] The auxiliary unwinding roller 22 includes a central shaft 221 and a roller body 222 sleeved on the central shaft 221. The roller body 222 is used to mount the cold-pressing film roll. A pusher plate 52 is located on the side of the corresponding auxiliary unwinding roller 22 where the cold-pressing film faces the other auxiliary unwinding roller 22. During unwinding, the pusher plate 52 is located at the end of the roller body 222 of the corresponding auxiliary unwinding roller 22 that is close to the other auxiliary unwinding roller 22. The pusher plate 52 is provided with a limiting hole for the corresponding auxiliary unwinding roller 22 to pass through. A mating bearing 53 is provided in the limiting hole, and the outer ring of the mating bearing 53 is connected to the pusher plate 52. When the auxiliary unwinding roller 22 is not expanded, the auxiliary unwinding roller 22 does not contact the mating bearing 53 to avoid wear. When the auxiliary unwinding roller 22 expands, the auxiliary unwinding roller 22 abuts against the inner ring of the corresponding mating bearing 53. At this time, the pusher plate 52 can limit the end of the auxiliary unwinding roller 22 that is close to the sleeve 27. Since the sleeve 27 can move, there is a possibility that the end of the auxiliary unwinding roller 22 near the sleeve 27 may wobble. However, by limiting the end of the auxiliary unwinding roller 22 near the sleeve 27 by the push plate 52, the stability of the auxiliary unwinding roller 22 can be maintained.

[0053] like Figures 4 to 6 As shown, the adjustment assembly 5 also includes a push block 54 and a second adjustment drive unit 55. The push block 54 is slidably disposed on the side of the push plate 52 near the sleeve 27, and the second adjustment drive unit 55 is disposed on the push plate 52 and connected to the push block 54. The sleeve 27 is provided with a limiting part 271, which corresponds one-to-one with the push block 54. When the push plate 52 is located at one end of the corresponding auxiliary unwinding roller 22 near another auxiliary unwinding roller 22, the second adjustment drive unit 55 can drive the push block 54 away from the sleeve 27 or engage with the corresponding limiting part 271 for limiting engagement. When engaged, the push block 54 is located at the top of the sleeve 27, and the limiting part 271 is located on the side of the push block 54. At this time, the push block 54 can prevent the sleeve 27 from moving, avoid the sleeve 27 from disengaging from the auxiliary unwinding roller 22, and also prevent the auxiliary unwinding roller 22 from shaking.

[0054] When it is necessary to replace the cold foil roll on the auxiliary unwinding roller 22, the auxiliary unwinding roller 22 retracts and disengages from the corresponding mating bearing 53. The first adjustment drive unit 51 drives the corresponding push plate 52 to move along the axial direction of the auxiliary unwinding roller 22 and gradually approach the sleeve 27. At this time, the push block 54 can squeeze the corresponding limiting part 271, thereby causing the sleeve 27 to move along the axial direction of the auxiliary unwinding roller 22, so that the sleeve 27 disengages from the corresponding auxiliary unwinding roller 22. The push plate 52 can also disengage from the corresponding auxiliary unwinding roller 22 through movement, so as to replace the cold foil roll later. After the replacement is completed, another first adjustment drive unit 51 can drive another push plate 52 and another push block 54 to push the sleeve 27 to achieve reset. It should be noted that a clearance groove 2221 can be provided on the end face of the roller body 222 of the auxiliary unwinding roller 22. The sleeve 27 can enter the clearance groove 2221 so that the sleeve 27 has sufficient movement stroke to ensure that the push plate 52 will not interfere with the sleeve 27 when it disengages from the auxiliary unwinding roller 22. That is, when the push block 54 moves with the push plate 52 and pushes the sleeve 27 into the clearance groove 2221 of one of the auxiliary unwinding rollers 22, the push plate 52 disengages from the other auxiliary unwinding roller 22.

[0055] In this embodiment, both the first adjustment drive unit 51 and the second adjustment drive unit 55 can be cylinders.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A winding and unwinding device for a screen printing cold foil stamping machine, characterized in that, include: Rack (1); The unwinding assembly (2) includes a main unwinding roller (21), an auxiliary unwinding roller (22), a first motor (23), and a second motor (24); the main unwinding roller (21) and the auxiliary unwinding roller (22) are both rotatably mounted on the frame (1); the main unwinding roller (21) is connected to the first motor (23) in a one-to-one correspondence; the auxiliary unwinding roller (22) is connected to the second motor (24) in a one-to-one correspondence. The winding assembly (3) includes a main winding roller (31), an auxiliary winding roller (32), a third motor (33), and a fourth motor (34); the main winding roller (31) and the auxiliary winding roller (32) are rotatably mounted on the frame (1); the main winding roller (31) is connected to the third motor (33) in a one-to-one correspondence; the auxiliary winding roller (32) is connected to the fourth motor (34) in a one-to-one correspondence. The adjustment assembly (5) includes a detection unit, a first adjustment drive unit (51), and a push plate (52); the detection unit is used to detect the position of the cold-pressed film roll on the main unwinding roller (21) and / or the main take-up roller (31); the push plate (52) is perpendicular to the auxiliary unwinding roller (22) and the auxiliary take-up roller (32), and the push plate (52) is slidably connected to the auxiliary unwinding roller (22) and the auxiliary take-up roller (32); the first adjustment drive unit (51) is connected to the push plate (52) and is used to drive the push plate (52) to push the cold-pressed film roll on the auxiliary unwinding roller (22) and the auxiliary take-up roller (32) to move and change the installation position.

2. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 1, characterized in that: The unwinding assembly (2) further includes two first mounting seats (25), which are mounted on the frame (1). The first mounting seats (25) are provided with slots (251), and the two ends of the main unwinding roller (21) are respectively engaged in the slots (251) of the two first mounting seats (25). A limiting ring (252) is hinged on the first mounting seat (25), and the limiting ring (252) is used to move relative to the first mounting seat (25) to open or close the slot (251).

3. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 2, characterized in that: The first mounting base (25) is provided with a first threaded hole (253), and the limiting ring (252) is provided with a second threaded hole (254). The first threaded hole (253) and the second threaded hole (254) correspond one-to-one. When the limiting ring (252) closes the slot of the card slot (251), the first threaded hole (253) and the corresponding second threaded hole (254) are coaxially connected.

4. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 1, characterized in that: Both the auxiliary unwinding roller (22) and the auxiliary winding roller (32) are pneumatic rollers.

5. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 4, characterized in that: The unwinding assembly (2) also includes a roll changing drive unit, a sleeve (27) and two second mounting seats (26), the second mounting seats (26) being slidably disposed on the frame (1); The number of the auxiliary unwinding roller (22) and the auxiliary winding roller (32) are both two; the two auxiliary unwinding rollers (22) are coaxially arranged, and the ends of the two auxiliary unwinding rollers (22) that are far apart from each other are rotatably connected to the second mounting base (26) respectively, and the ends of the two auxiliary unwinding rollers (22) that are close to each other are rotatably connected to the sleeve (27); The sleeve (27) is configured to move along the axial direction of the auxiliary unwinding roller (22) to disengage from the auxiliary unwinding roller (22); The roll changing drive unit is connected to the second mounting base (26) and is used to drive the second mounting base (26) to move in a direction perpendicular to the axis of the auxiliary unwinding roll (22).

6. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 5, characterized in that: The winding and unwinding device of the screen printing cold ironing machine also includes a support member (4), which is used to support the sleeve (27).

7. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 5, characterized in that: The number of the adjustment components (5) is two, and the two adjustment components (5) correspond one-to-one with the two auxiliary unwinding rollers (22); The auxiliary unwinding roller (22) includes a central shaft (221) and a roller body (222) sleeved on the central shaft (221), the roller body (222) being used to mount the cold ironing film roll; The push plate (52) is located on the side of the corresponding auxiliary unwinding roller (22) where the cold foil is facing the other auxiliary unwinding roller (22). During unwinding, the push plate (52) is located at the end of the roller body (222) of the corresponding auxiliary unwinding roller (22) that is close to the other auxiliary unwinding roller (22). The push plate (52) is provided with a limiting hole for the corresponding auxiliary unwinding roller (22) to pass through.

8. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 7, characterized in that: The limiting hole is provided with a docking bearing (53). When the auxiliary unwinding roller (22) expands, the auxiliary unwinding roller (22) abuts against the inner ring of the corresponding docking bearing (53).

9. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 7, characterized in that: The adjustment assembly (5) further includes a push block (54), which is located on the side of the push plate (52) near the sleeve (27). The push block (54) is used to push the sleeve (27) to move along the axial direction of the auxiliary unwinding roller (22). The end face of the roller body (222) is provided with a relief groove (2221), which is used to avoid the sleeve (27). The clearance groove (2221) is configured such that when the pusher (54) pushes the sleeve (27) into the clearance groove (2221) of one of the auxiliary unwinding rollers (22), the pusher plate (52) disengages from the other auxiliary unwinding roller (22).

10. The unwinding and rewinding device of the screen printing cold foil stamping machine according to claim 9, characterized in that: The sleeve (27) is provided with a limiting part (271), and the limiting part (271) corresponds one-to-one with the push block (54); the push block (54) is slidably connected to the push plate (52); The adjustment assembly (5) further includes a second adjustment drive unit (55), which is disposed on the push plate (52) and connected to the push block (54). The second adjustment drive unit (55) and the push block (54) are configured such that when the push plate (52) is located at one end of the corresponding auxiliary unwinding roller (22) near the other auxiliary unwinding roller (22), the second adjustment drive unit (55) drives the push block (54) away from the sleeve (27) or engages with the corresponding limiting part (271) for limiting.

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