Servo gilder

Abstract

The application relates to the technical field of gilding machines, and discloses a servo gilding machine which comprises a rack, a pressing head, a workbench and a winding assembly arranged on the rack, and a displacement air cylinder is further arranged on the rack, a mounting plate is arranged on a piston rod of the displacement air cylinder, the winding assembly comprises a unwinding shaft, a winding shaft, a stepping motor, a connecting rod and guide rollers arranged on the connecting rod, the guide rollers are arranged on the side close to the workbench of the unwinding shaft and the winding shaft, and an output shaft of the stepping motor is located between the winding shaft and the guide rollers. The displacement air cylinder can drive the mounting plate to move as a whole, thereby driving the gilding paper on the unwinding shaft, the winding shaft and the guide rollers to move to the top of the leather to perform a gilding step, or driving the gilding paper to move out of the top of the leather, so that the pressing head can be directly pressed on the leather to perform a branding step, the operation steps of branding and gilding are simplified, and the automation degree of the gilding machine and the gilding quality are improved.

Description

Technical Field

[0001] This application relates to the technical field of hot stamping machines, and more particularly to a servo hot stamping machine. Background Technology

[0002] A hot stamping machine is a special printing device that uses heat and pressure to transfer the metallic layer or pigment from hot stamping foil onto the surface of materials such as paper, plastic, or leather. It can create metallic patterns on leather surfaces, enhancing their aesthetics and perceived quality.

[0003] In related technologies, a hot stamping machine includes a frame, a drive cylinder mounted on the frame, a pressing head mounted on the drive cylinder, a worktable mounted on the frame, and a winding assembly. The winding assembly is used to wind up the hot stamping foil, which is located between the pressing head and the worktable. The pressing head generates heat through a heating wire. When the hot stamping machine is running, the leather to be processed is placed on the worktable, and then the drive cylinder is activated, thereby driving the pressing head to press against the hot stamping foil and the leather. A preset pattern is formed on the pressing head, ultimately resulting in a preset pattern with a metallic sheen on the leather.

[0004] However, to ensure the three-dimensionality and durability of the metallic pattern during use, the aforementioned hot stamping machines typically require two steps: branding and hot stamping on the leather. Branding does not require hot stamping foil; the pressure head is directly pressed onto the leather to create a pattern imprint with a certain depth. Then, hot stamping foil is placed on top of the leather, and the pressure head presses the foil onto the leather, transferring the metallic layer from the foil to the pattern imprint, resulting in a three-dimensional pattern and improved durability. However, these branding and hot stamping steps require operators to frequently move the hot stamping foil, ensuring it is either above or below the leather. This is labor-intensive, complex, and prone to wrinkling or tearing, leading to poor quality metallic patterns and low automation of the hot stamping machine, thus requiring improvement. Summary of the Invention

[0005] To simplify the branding and hot stamping processes and improve the automation level and hot stamping quality of hot stamping machines, this application provides a servo hot stamping machine.

[0006] The servo hot stamping machine provided in this application adopts the following technical solution: A servo hot stamping machine includes a frame, a lower pressure head, a worktable mounted on the frame, and a winding assembly. The winding assembly is used to wind hot stamping foil. The frame is also equipped with a displacement cylinder. The piston rod of the displacement cylinder is equipped with a mounting plate. The displacement cylinder can drive the mounting plate to move towards or away from the lower pressure head. The winding assembly includes an unwinding shaft, a winding shaft, a stepper motor, a connecting rod, and guide rollers mounted on the connecting rod, all mounted on the mounting plate. Two guide rollers are provided and located on the side of the unwinding shaft and the winding shaft closest to the worktable. The output shaft of the stepper motor is located between the winding shaft and the guide rollers.

[0007] By adopting the above technical solution, the displacement cylinder can drive the entire mounting plate to move, thereby moving the entire winding assembly horizontally closer to or further away from the pressure head. This, in turn, moves the hot stamping foil on the unwinding shaft, winding shaft, and guide rollers directly above the leather for the hot stamping process. Alternatively, it can move the hot stamping foil above the leather, allowing the pressure head to directly press onto the leather for the branding process. Branding before hot stamping, or hot stamping before branding, both methods result in a more three-dimensional effect on the leather and a more durable pattern. The two guide rollers on the connecting rod effectively guide the hot stamping foil, keeping it taut and flat, reducing the possibility of wrinkles and ensuring a good hot stamping effect on the leather. The stepper motor provides precise driving force for the unwinding and winding operations, ensuring precise control of the foil's step length after each hot stamping action. This not only guarantees accurate transfer positioning but also effectively saves hot stamping foil material and avoids waste.

[0008] Optionally, it also includes a servo motor mounted on the frame and a controller electrically connected to the servo motor. The pressing head is mounted on the output shaft of the servo motor. A hot stamping plate is detachably mounted on the pressing head. The hot stamping plate has a preset pattern. Multiple hot stamping plates are provided, and the preset patterns on each hot stamping plate are different.

[0009] By adopting the above technical solution, the pressure head is driven by a servo motor, achieving precise control of the pressure stroke and pressure compared to driving the pressure head with a cylinder. When processing leather of different sizes, only the parameters on the controller need to be adjusted, thereby improving the adaptability and flexibility of processing leather of different sizes. In addition, operators can quickly install or remove hot stamping stencils with different preset patterns from the pressure head according to actual production and processing needs. Equipped with multiple hot stamping stencils with different preset patterns, the same hot stamping machine can easily perform the transfer of multiple patterns without replacing the entire pressure head assembly, improving the flexibility and production efficiency of the equipment and reducing production costs.

[0010] Optionally, the frame is also equipped with a safety cylinder, and the piston rod of the safety cylinder is equipped with a sliding plate. The sliding plate is slidably mounted on the frame in a vertical direction. The sliding plate is equipped with a fixing block and a sensor. A detection rod is slidably mounted on the fixing block. The sensor is used to sense the distance between the detection rod and the leather. The sensor is electrically connected to the controller. A pressing rod is provided at the end of the detection rod away from the fixing block. The pressing rod includes multiple segments and is enclosed to form a square.

[0011] By adopting the above technical solution, the safety cylinder's action can drive the sliding plate and detection rod downwards. Multiple segments forming a square pressing rod pre-press and flatten the leather, preventing displacement or wrinkling during hot stamping. Simultaneously, the sensor can accurately sense the actual distance between the detection rod and the leather surface in real time and feed this distance signal back to the controller electrically connected to it. If a hand is positioned between the detection rod and the leather, the sensor detects that the distance is too large and sends a pause signal to the controller. This prevents the controller from controlling the servo motor to press down, reducing the risk of the operator's hand being crushed by the pressing head and ensuring operator safety. The controller precisely controls the servo motor's pressing stroke based on this pause signal, forming a closed-loop control that enhances operational safety. The detection rod is slidably mounted on a fixed block, allowing it to slide upwards on the block when it touches the operator's hand, preventing continuous pressure on the hand and further improving safety when using the hot stamping machine.

[0012] Optionally, the connecting rod is slidably mounted on the mounting plate, and the mounting plate is provided with a locking element for fixing the connecting rod to the mounting plate.

[0013] By adopting the above technical solution, when processing leather of different thicknesses, the connecting rod can slide vertically relative to the mounting plate, thereby driving the guide roller to move away from or towards the worktable. This increases or decreases the distance between the hot stamping foil on the guide roller and the worktable, adapting to leather of different thicknesses and further improving the flexibility of the hot stamping machine. The locking component can fix the connecting rod in a fixed position on the mounting plate, ensuring the stability of the connecting rod and the guide roller, thus keeping the hot stamping foil taut and ensuring the quality of the hot stamping on the leather.

[0014] Optionally, the lower press head is provided with a sliding rod, which is slidably mounted on the frame. A linkage component is provided between the sliding rod and the connecting rod. When the sliding rod slides towards the worktable, the sliding rod drives the connecting rod to slide towards the worktable through the linkage component, so that the hot stamping foil on the guide roller adheres to the leather.

[0015] By adopting the above technical solution, when the pressing head descends under the drive of the servo motor, it drives the sliding rod to move downwards synchronously. The sliding rod guides the movement of the pressing head. Then, the sliding rod transmits this movement to the connecting rod through the linkage assembly, causing the connecting rod to move downwards towards the worktable synchronously with the guide roller. The linkage assembly ensures that before the pressing head actually presses against the leather, the guide roller has already guided the hot stamping foil and smoothly adhered it to the leather surface, effectively preventing the hot stamping foil from tearing or the transferred pattern from wrinkling and deforming when suspended under pressure, thus improving the integrity and appearance quality of the pattern transfer.

[0016] Optionally, the mounting plate includes a sliding seat with a sliding hole obliquely formed on it. The sliding seat is slidably disposed in the sliding hole and can slide towards or away from the worktable. The linkage component includes an abutment rod disposed on the sliding seat and a push rod slidably disposed on the sliding rod. The push rod is disposed on the side of the abutment rod away from the worktable. The connecting rod is disposed on the sliding seat. There are two of each of the connecting rod, guide roller, sliding seat, abutment rod, and push rod, and they correspond one-to-one. When the sliding seat slides towards the worktable, the two guide rollers move towards each other.

[0017] By adopting the above technical solution, when the pressing head is about to move into position towards the worktable, the push rod on the sliding rod abuts against the abutment rod. As the pressing head continues to move towards the worktable, the push rod pushes the abutment rod to move towards the worktable, thus forcing the sliding seat to slide towards the worktable within the inclined sliding hole. Because the sliding hole is inclined, the sliding seat also generates horizontal displacement while moving downwards. As it slides down, it drives the two corresponding guide rollers to move towards each other. At the same time, the two guide rollers also move towards the worktable, thus pulling the hot stamping foil towards the worktable and ensuring that the part of the hot stamping foil to be transferred adheres to the leather, reducing the risk of wrinkles during hot stamping by the pressing head. During this process, as the two guide rollers move towards the worktable and towards each other, there is no need to release the hot foil from the roll. The hot foil can move downwards and adhere to the leather (if the guide rollers simply move downwards, a certain length of hot foil needs to be released to adhere to the leather). This simplifies the operation steps of the hot foil stamping machine, thereby reducing the probability of operation errors and improving the hot foil stamping quality.

[0018] Simultaneously, through the aforementioned design, the guide rollers on both sides retract inward simultaneously the moment the pressure head presses the hot stamping foil into the leather, actively releasing the tension of the hot stamping foil and providing length compensation and cushioning for the foil's downward pressure. This improves the problem of hot stamping foil breaking or wrinkling due to excessive stretching during deep pressing, protects the foil material from tearing, and thus enhances the transfer quality of the hot stamping pattern.

[0019] Optionally, a return spring is provided on the wall of the sliding hole, which can drive the sliding seat away from the worktable. A sliding groove is provided on the sliding rod, and the push rod is slidably disposed in the sliding groove in the vertical direction. A retaining spring is provided on the wall of the sliding groove, which can drive the push rod to slide towards the side closer to the abutting rod. The elastic force of the retaining spring is greater than that of the return spring.

[0020] By adopting the above technical solution, when the pressing head first begins to move downwards, the push rod, under the action of the clamping spring, presses against the groove wall on the side of the sliding groove closest to the worktable. Then, when the sliding rod slides until the push rod abuts against the abutting rod (at which point the pressing head is about to press onto the hot stamping foil), because the elastic force of the clamping spring is greater than the elastic force of the return spring, the push rod will not slide in the sliding groove at this time. Instead, it will push the abutting rod and the sliding seat towards the worktable, so that the hot stamping foil is adhered to the leather before the pressing head presses on, and the guide roller abuts against the leather. Then, when the sliding rod continues to move downwards, because the guide roller has already abutted against the leather, the push rod cannot continue to push the abutting rod to move. As a result, the push rod will overcome the elastic force of the clamping spring and slide in the sliding groove, causing the clamping spring to be compressed. This provides clearance for the sliding rod and the pressing head to continue moving, allowing the pressing head to press onto the hot stamping foil normally. Ultimately, the correct sequence was achieved: first, the foil was applied to the leather, and then the pressure head was pressed onto the foil, ensuring the quality of the hot stamping.

[0021] When a single hot stamping action is completed and the push rod is pushed upward with the lower pressure head, the elastic force of the return spring can automatically drive the sliding seat to return to the initial position along the sliding hole away from the worktable, thereby driving the guide roller to reset and re-tension the hot stamping foil, ensuring the continuity of the hot stamping machine's continuous automated operation.

[0022] Optionally, the axial length of the abutment rod is less than the maximum horizontal distance between the push rod and the mounting plate. When the displacement cylinder drives the mounting plate to move into position closer to the lower pressure head, the abutment rod is located directly below the push rod near the worktable.

[0023] By adopting the above technical solution, when the displacement cylinder drives the mounting plate to move towards the worktable, that is, when the hot stamping foil is above the leather and about to be hot stamped, the pressing head will press down to drive the push rod to push the abutment rod towards the worktable, thus pre-adhering the hot stamping foil to the leather. When the displacement cylinder does not drive the mounting plate to move, that is, when the hot stamping foil is outside the leather (at which point the branding step is performed, and hot stamping foil is not needed), the push rod and the abutment rod are misaligned in the vertical direction. The pressing head will not drive the abutment rod towards the worktable, thus keeping the guide roller and hot stamping foil still, saving unnecessary movements and reducing the probability of the hot stamping foil coming into contact with other components and causing wrinkles or cracks.

[0024] Optionally, the connecting rod has a waist-shaped hole, the sliding seat has a fastening screw hole, and the locking component includes a fixing bolt disposed in the fastening screw hole and the waist-shaped hole.

[0025] By adopting the above technical solution, the oblong hole on the connecting rod, combined with the fixing bolt, allows the operator to flexibly fine-tune the position of the connecting rod and guide roller relative to the sliding seat using the length allowance of the oblong hole after loosening the fixing bolt. This adjusts the distance between the guide roller and the worktable to accommodate leather of different thicknesses. After fine-tuning, the fixing bolt is tightened for locking, providing more precise operating space for the installation and height adjustment of the guide roller, thereby enhancing the adaptability of the hot stamping machine to leather of different sizes.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The displacement cylinder can drive the entire winding assembly to move horizontally, which makes it convenient for the hot stamping machine to flexibly switch between the process steps of first branding and then hot stamping or first hot stamping and then branding, so that the hot stamping pattern presents a more three-dimensional effect and is more durable. 2. By combining the safety cylinder and the sensor, if human intervention causes the sensor to detect that the distance is too large, a pause signal will be sent to the controller, forming a safety closed loop and ensuring the safety of the operator; 3. The linkage assembly consisting of the push rod and the abutment rod can cause the two guide rollers to move closer to each other and downward when pressing the leather. This actively releases the tension of the hot stamping foil and provides a buffer margin, so that the hot stamping foil is attached to the leather before the pressing head presses it. This reduces the possibility of the hot stamping foil being pulled and broken when it is suspended under pressure, thus ensuring the quality of hot stamping. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0028] Figure 2This is a partial structural diagram of the servo motor shown behind a hidden portion of the rack in Embodiment 1 of this application.

[0029] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0030] Figure 4 This is a partial structural schematic diagram of the fixing bolt used in Embodiment 2 of this application.

[0031] Figure 5 This is a partial structural schematic diagram of the sliding groove used in Embodiment 2 of this application.

[0032] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0033] Explanation of reference numerals in the attached figures: 1. Frame; 11. Servo motor; 12. Controller; 13. Lower pressure head; 131. Sliding rod; 132. Sliding groove; 133. Pressing spring; 14. Hot stamping plate; 2. Worktable; 3. Safety cylinder; 31. Sliding plate; 32. Fixing block; 33. Detection rod; 34. Pressing rod; 4. Displacement cylinder; 41. Mounting plate; 411. Sliding hole; 412. Return spring; 42. Connecting rod; 421. Waist-shaped hole; 43. Locking component; 431. Fixing bolt; 44. Guide roller; 45. Sliding seat; 5. Rewinding assembly; 51. Unwinding shaft; 52. Rewinding shaft; 53. Stepper motor; 6. Linkage assembly; 61. Push rod; 62. Abutment rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a servo hot stamping machine. Example 1

[0036] Reference Figure 1 and Figure 2 A servo hot stamping machine includes a frame 1, on which a worktable 2 is mounted for placing materials such as leather to be processed. A servo motor 11 is mounted on the frame 1 and electrically connected to a controller 12. The servo motor 11 has an output shaft with a pressing head 13 mounted on it. A hot stamping plate 14 is detachably mounted on the pressing head 13, the detachment being achieved by bolt connection. The hot stamping plate 14 has a preset pattern (not shown in the figure), and multiple hot stamping plates 14 are provided to accommodate different processing needs, each with a different preset pattern.

[0037] Reference Figure 2To ensure processing flatness and operational safety, a safety cylinder 3 is installed on the frame 1. The safety cylinder 3 has a piston rod, on which a sliding plate 31 is mounted. The sliding plate 31 is slidably mounted on the frame 1 in a vertical direction. A fixing block 32 and a sensor (not shown in the figure) are provided on the sliding plate 31. A detection rod 33 is slidably mounted on the fixing block 32. The sensor is used to sense the distance between the detection rod 33 and the leather. The sensor is electrically connected to the controller 12. A pressing rod 34 is provided at the end of the detection rod 33 away from the fixing block 32. The pressing rod 34 consists of multiple segments that are enclosed to form a square.

[0038] Reference Figure 2 In terms of conveying the hot foil, the frame 1 is also equipped with a displacement cylinder 4, which has a piston rod on which a mounting plate 41 is mounted. The displacement cylinder 4 can drive the mounting plate 41 to move closer to or further away from the lower pressure head 13. The mounting plate 41 is equipped with a winding assembly 5 for winding the hot foil.

[0039] Reference Figure 2 The winding assembly 5 includes an unwinding shaft 51, a winding shaft 52, and a stepper motor 53, all mounted on a mounting plate 41. Two connecting rods 42 are slidably mounted on the mounting plate 41, and a locking element 43 is provided on the mounting plate 41 to fix the connecting rods 42 to the mounting plate 41. The locking element 43 can be a bolt, with corresponding screw holes on the mounting plate 41 and through holes on the connecting rods 42 for the bolts to pass through. Guide rollers 44 are respectively mounted on the two connecting rods 42, and both guide rollers 44 are located on the side of the unwinding shaft 51 and the winding shaft 52 closest to the worktable 2. The stepper motor 53 has an output shaft located between the winding shaft 52 and the guide rollers 44.

[0040] The implementation principle of a servo hot stamping machine according to an embodiment of this application is as follows: When the hot stamping machine is running, leather is placed on the worktable 2. If a branding step is required, the displacement cylinder 4 drives the mounting plate 41 away from the lower pressure head 13, causing the hot stamping foil to move above the leather; if a hot stamping step is required, the displacement cylinder 4 drives the mounting plate 41 to move horizontally towards the lower pressure head 13, causing the hot stamping foil on the guide roller 44 to move directly above the leather. During processing, the safety cylinder 3 moves the sliding plate 31 downward, pre-pressing and flattening the leather through the multi-segment square pressing rod 34. At the same time, the sensor accurately senses the actual distance between the detection rod 33 and the leather surface in real time. If human intervention causes the sensor to detect an excessive distance, it will send a pause signal to the controller 12 to stop the pressing action to ensure safety. If there is no abnormality, the servo motor 11 accurately drives the lower pressure head 13 to press onto the hot stamping foil or leather. The operator can adjust the distance between the guide roller 44 and the worktable 2 by sliding the connecting rod 42 and fixing it with the locking piece 43, to accommodate leather of different thicknesses. After a single hot stamping operation is completed, the stepper motor 53 provides precise driving force for the unwinding and rewinding operation, ensuring that the step length of the hot stamping foil is precisely controllable. Example 2

[0041] Reference Figure 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that a linkage assembly 6 is provided between the pressing head 13 and the connecting rod 42, and a sliding hole 411 is obliquely opened on the mounting plate 41, in which a sliding seat 45 is slidably disposed. The sliding seat 45 can slide towards or away from the worktable 2. In this embodiment, the connecting rod 42 is specifically disposed on the aforementioned sliding seat 45, and an oblong hole 421 is opened on the connecting rod 42. A fastening screw hole (not shown in the figure) is opened on the sliding seat 45. The locking member 43 specifically includes a fixing bolt 431, which is disposed in the fastening screw hole and the oblong hole 421.

[0042] Reference Figure 3 , Figure 5 and Figure 6 A sliding rod 131 is provided on the lower pressure head 13, and the sliding rod 131 is slidably mounted on the frame 1. A sliding groove 132 is formed on the sliding rod 131, and a push rod 61 is slidably mounted vertically in the sliding groove 132. A retaining spring 133 is provided on the groove wall of the sliding groove 132, and the retaining spring 133 can drive the push rod 61 to slide towards the worktable 2. At the same time, an abutment rod 62 is provided on the sliding seat 45, and the aforementioned push rod 61 is located on the side of the abutment rod 62 away from the worktable 2, and the retaining spring 133 can drive the push rod 61 to slide towards the side of the abutment rod 62. The push rod 61 and the abutment rod 62 together constitute the linkage assembly 6 between the sliding rod 131 and the connecting rod 42.

[0043] Reference Figure 3 , Figure 4 and Figure 6 Two of each of the following components are provided: connecting rod 42, guide roller 44, sliding seat 45, abutment rod 62, and push rod 61, maintaining a one-to-one correspondence. The axial length of the abutment rod 62 is less than the maximum horizontal distance between the push rod 61 and the mounting plate 41. This ensures that the abutment rod 62 is positioned directly below the push rod 61 near the worktable 2 only when the displacement cylinder 4 drives the mounting plate 41 towards the lower pressure head 13, allowing the push rod 61 to push the abutment rod 62 downwards. A return spring 412 is provided on the wall of the sliding hole 411. The return spring 412 can drive the sliding seat 45 away from the worktable 2, and the elastic force of the clamping spring 133 is greater than the elastic force of the return spring 412.

[0044] Reference Figure 3 and Figure 5 When the sliding rod 131 slides towards the worktable 2, it can drive the connecting rod 42 to slide towards the worktable 2 via the linkage assembly 6, so that the hot stamping foil on the guide roller 44 adheres to the leather. During this process, when the sliding seat 45 slides towards the worktable 2, the two guide rollers 44 will move towards each other.

[0045] The implementation principle of a servo hot stamping machine in this application embodiment is as follows: the operator can loosen the fixing bolt 431 and use the length margin of the waist-shaped hole 421 to flexibly fine adjust the position of the connecting rod 42 relative to the worktable 2 to adapt to the operation requirements of leather of different sizes. After fine adjustment, the fixing bolt 431 is tightened.

[0046] When hot stamping is required and the mounting plate 41 is moved into position by the displacement cylinder 4, the abutment rod 62 is positioned directly below the push rod 61 near the worktable 2. When the pressing head 13 descends under the drive of the servo motor 11, it drives the sliding rod 131 to move downwards synchronously. Since the tension spring 133 has a greater elasticity than the return spring 412, when the push rod 61 abuts the abutment rod 62, the push rod 61 will not immediately slide in the sliding groove 132. Instead, it pushes the abutment rod 62 to force the sliding seat 45 to overcome the elasticity of the return spring 412 and slide towards the worktable 2 within the inclined sliding hole 411. As the sliding seat 45 moves downwards and generates horizontal displacement, it drives the guide rollers 44 on both sides to move downwards synchronously and towards each other. This action actively releases the tension of the hot stamping foil, allowing the hot stamping foil to adhere to the leather before the pressing head 13 presses down, thus ensuring the quality of the hot stamping. Subsequently, due to the obstruction of the guide roller 44 by the leather, the push rod 61 overcomes the clamping spring 133 and slides in the sliding groove 132 to give way, and the lower pressure head 13 presses the hot stamping foil normally.

[0047] When the pressing head 13 is lifted and reset, the reset spring 412 automatically drives the sliding seat 45 to return to its initial position along the sliding hole 411. At the same time, the guide roller 44 resets and moves the hot stamping foil away from the leather. If the mounting plate 41 is not moved to a position close to the worktable 2 during the branding process where hot stamping foil is not used, the push rod 61 and the abutment rod 62 are misaligned. When the pressing head 13 descends, it will not drive the guide roller 44 to move, thereby reducing the probability of the hot stamping foil wrinkling or breaking.

[0048] 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 servo hot stamping machine, comprising a frame (1), a pressure head (13), a worktable (2) disposed on the frame (1), and a winding assembly (5), wherein the winding assembly (5) is used to wind hot stamping foil, characterized in that: The frame (1) is also provided with a displacement cylinder (4), and the piston rod of the displacement cylinder (4) is provided with a mounting plate (41). The displacement cylinder (4) can drive the mounting plate (41) to move towards or away from the lower pressure head (13). The winding assembly (5) includes an unwinding shaft (51), a winding shaft (52), a stepper motor (53), a connecting rod (42), and a guide roller (44) provided on the connecting rod (42). There are two guide rollers (44) and they are located on the side of the unwinding shaft (51) and the winding shaft (52) close to the worktable (2). The output shaft of the stepper motor (53) is located between the winding shaft (52) and the guide roller (44). It also includes a servo motor (11) mounted on the frame (1) and a controller (12) electrically connected to the servo motor (11). The pressing head (13) is mounted on the output shaft of the servo motor (11). A hot stamping plate (14) is detachably mounted on the pressing head (13). The hot stamping plate (14) has a preset pattern. Multiple hot stamping plates (14) are provided, and the preset patterns on each hot stamping plate (14) are different. The connecting rod (42) is slidably mounted on the mounting plate (41), and the mounting plate (41) is provided with a locking member (43), which is used to fix the connecting rod (42) on the mounting plate (41); The lower pressure head (13) is provided with a sliding rod (131), which is slidably mounted on the frame (1). A linkage component (6) is provided between the sliding rod (131) and the connecting rod (42). When the sliding rod (131) slides towards the worktable (2), the sliding rod (131) drives the connecting rod (42) to slide towards the worktable (2) through the linkage component (6), so that the hot stamping foil on the guide roller (44) is attached to the leather.

2. The servo hot stamping machine according to claim 1, characterized in that: The frame (1) is also provided with a safety cylinder (3). The piston rod of the safety cylinder (3) is provided with a sliding plate (31). The sliding plate (31) is slidably disposed on the frame (1) in the vertical direction. The sliding plate (31) is provided with a fixing block (32) and a sensor. The fixing block (32) is slidably disposed with a detection rod (33). The sensor is used to sense the distance between the detection rod (33) and the leather. The sensor is electrically connected to the controller (12). The end of the detection rod (33) away from the fixing block (32) is provided with a pressing rod (34). The pressing rod (34) includes multiple segments and is enclosed to form a square.

3. A servo hot stamping machine according to claim 1, characterized in that: The mounting plate (41) includes a sliding seat (45), and a sliding hole (411) is obliquely opened on the mounting plate (41). The sliding seat (45) is slidably disposed in the sliding hole (411). The sliding seat (45) can slide towards or away from the worktable (2). The linkage component (6) includes an abutment rod (62) disposed on the sliding seat (45) and a push rod (61) slidably disposed on the sliding rod (131). The push rod (61) is disposed on the side of the abutment rod (62) away from the worktable (2). The connecting rod (42) is disposed on the sliding seat (45). There are two of each of the connecting rod (42), guide roller (44), sliding seat (45), abutment rod (62) and push rod (61), and they correspond one to one. When the sliding seat (45) slides towards the worktable (2), the two guide rollers (44) move towards each other.

4. A servo hot stamping machine according to claim 3, characterized in that: A return spring (412) is provided on the wall of the sliding hole (411). The return spring (412) can drive the sliding seat (45) away from the worktable (2). A sliding groove (132) is provided on the sliding rod (131). The push rod (61) is slidably disposed in the sliding groove (132) in the vertical direction. A retaining spring (133) is provided on the groove wall of the sliding groove (132). The retaining spring (133) can drive the push rod (61) to slide towards the side close to the abutting rod (62). The elastic force of the retaining spring (133) is greater than the elastic force of the return spring (412).

5. A servo hot stamping machine according to claim 3, characterized in that: The axial length of the abutment rod (62) is less than the maximum horizontal distance between the push rod (61) and the mounting plate (41). When the displacement cylinder (4) drives the mounting plate (41) to move into place closer to the lower pressure head (13), the abutment rod (62) is located directly below the push rod (61) near the worktable (2).

6. A servo hot stamping machine according to claim 3, characterized in that: The connecting rod (42) has a waist-shaped hole (421), the sliding seat (45) has a fastening screw hole, and the locking member (43) includes a fixing bolt (431) disposed in the fastening screw hole and the waist-shaped hole (421).

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