Buffer protection device for winding press roller

Abstract

This utility model discloses a buffer protection device for a take-up pressure roller, including a frame, a slide, a take-up roller, a pressure roller, a first drive component, and a damper. The pressure roller is arranged parallel to the take-up roller and located behind it, and is rotatably connected to the slide. The first drive component is mounted on the frame, with its drive end facing forward and connected to the slide. The first drive component applies a forward preload force to the pressure roller. The damper is mounted on the frame, with its movable end facing forward and connected to the slide. When the pressure roller moves backward, the damper applies a forward damping force to it. During the take-up process, the first drive component applies force to the pressure roller, allowing it to press firmly against the film on the take-up roller. When the diameter of the take-up roller increases due to winding, it applies force to the pressure roller, causing both the pressure roller and the slide to move backward. During this backward movement, the pressure roller is subjected to a damping force from the damper, resulting in smooth and controlled movement and improved winding quality.

Description

Technical Field

[0001] This utility model relates to the field of film production technology, and in particular to a buffer protection device for a winding pressure roller. Background Technology

[0002] In the production process of biaxially oriented films, after transverse stretching, the film is transferred to a winding device via a traction system for winding. During this process, air inevitably gets trapped between the film layers. As the winding diameter gradually increases, the amount of trapped air also accumulates, which can easily lead to problems such as loose winding and interlayer displacement, seriously affecting the quality of the final product and its subsequent processing performance.

[0003] Therefore, a take-up pressure roller is typically installed before the take-up roller inlet. This pressure roller is arranged parallel to the take-up roller and is driven by a cylinder to press against the film on the take-up shaft. This forces out interlayer air and applies pressure to the film to achieve a tight winding effect. However, as winding continues, the film roll diameter dynamically increases. Because the control method between the cylinder and the take-up pressure roller is rigid, the pressure output is not linear enough, making it difficult to achieve smooth and precise clamping force control. This results in local tension differences, affecting the winding quality. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a buffer protection device for a winding pressure roller.

[0005] This utility model embodiment provides a buffer protection device for a winding pressure roller, the buffer protection device for the winding pressure roller includes:

[0006] frame;

[0007] A slide block is slidably connected to the frame in the front-to-back direction;

[0008] The take-up roller has its axis pointing left and right, and the take-up roller is rotatably connected to the frame.

[0009] A pressure roller is arranged parallel to the take-up roller and located behind the take-up roller, and the pressure roller is rotatably connected to the slide block;

[0010] A first driving component is mounted on the frame, with its driving end facing forward and connected to the slide block. The first driving component applies a forward preload force to the pressure roller.

[0011] A damper is mounted on the frame, with its movable end facing forward and connected to the slide block; when the pressure roller moves backward, the damper applies a forward damping force to the pressure roller.

[0012] According to some embodiments of the present invention, the frame includes a fixed frame, a sliding frame, and a second driving component. The sliding frame is slidably connected to the fixed frame in the front-back direction. The second driving component is used to drive the sliding frame to slide in the front-back direction. The first driving component and the damper are both mounted on the sliding frame. The slide block is slidably connected to the sliding frame in the front-back direction.

[0013] According to some embodiments of the present invention, the second driving component includes a screw and a drive motor. The screw is rotatably connected to the fixed frame, and the drive motor is used to drive the screw to rotate around its own axis. A support seat is fixedly connected to the sliding frame, and the support seat is sleeved on the screw. The rotation of the screw can drive the support seat to move in the front-back direction.

[0014] According to some embodiments of this utility model, the damper includes an outer cylinder, an inner cylinder, a piston rod, and a spring. The inner cavity of the inner cylinder contains oil. The outer cylinder and the inner cylinder are coaxially arranged with their axes pointing in a front-to-back direction. The inner cylinder is disposed inside the outer cylinder. The inner circumferential wall of the outer cylinder and the outer circumferential wall of the inner cylinder form an annular channel. The piston end of the piston rod is inserted rearward into the inner cylinder and slidably connected to it. The piston end of the piston rod divides the inner cavity of the inner cylinder into a front cavity and a rear cavity. The piston rod is provided with an annular baffle located in the front cavity. The spring is located in the front cavity. The rear end of the spring is connected to the inner circumferential wall of the inner cylinder, and the front end of the spring is connected to the annular baffle. The inner cylinder is provided with a first overflow hole and a second overflow hole. The first overflow hole connects the front cavity and the annular channel, and the second overflow hole connects the rear cavity and the annular channel. The first overflow hole is located on the front side of the annular baffle.

[0015] According to some embodiments of the present invention, the annular baffle divides the front cavity into a first cavity and a second cavity, and there is a gap between the outer peripheral wall of the annular baffle and the inner peripheral wall of the inner cylinder.

[0016] According to some embodiments of the present invention, the damper further includes a first solenoid valve, the inner cylinder is provided with a first connection port, the first connection port connects the second cavity and the annular channel, and the first solenoid valve is used to open or block the first connection port.

[0017] According to some embodiments of the present invention, the damper further includes a second solenoid valve, the inner cylinder is provided with a second connection port, the second connection port connects the rear cavity and the annular channel, and the second solenoid valve is used to open or block the second connection port.

[0018] According to some embodiments of the present invention, the inner circumferential wall of the inner cylinder is provided with an annular support plate, the annular support plate is located on the rear side of the annular baffle, and the rear end of the spring is connected to the front end face of the annular support plate.

[0019] According to some embodiments of the present invention, the piston rod passes through the annular support plate, and there is a gap between the outer peripheral wall of the piston rod and the inner peripheral wall of the annular support plate.

[0020] According to some embodiments of the present invention, the piston rod is provided with an annular groove, the damper further includes a retaining ring, the retaining ring is located in the front cavity, the retaining ring is sleeved on the piston rod, the inner side of the retaining ring is inserted into the annular groove, and the front end face of the annular baffle abuts against the rear end face of the retaining ring.

[0021] The buffer protection device for the winding pressure roller according to the embodiment of this utility model has at least the following technical effects:

[0022] 1. During the winding process, the first drive component applies force to the pressure roller, so that the pressure roller can press against the film on the winding roller. When the diameter of the winding roller increases due to winding, the winding roller applies force to the pressure roller, causing the pressure roller and the slide to move backward. During the backward movement of the pressure roller, it is subjected to the damping force applied by the damper, so that the pressure roller moves smoothly and improves the winding quality.

[0023] 2. The preload ensures that the pressure roller can hold the film firmly, while the damping force ensures that the pressure roller can move backward stably. This avoids the problem that rigid drive methods cannot balance constant pressure and dynamic adaptability, making the pressure roller move smoothly and gradually. The pressure applied by the pressure roller to the film changes gradually and continuously, effectively avoiding the problem of uneven air discharge between layers or excessive local film rolling caused by sudden pressure changes. This results in high-quality film rolls with consistent internal and external tightness and neat end faces.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the structure of a buffer protection device for a winding pressure roller according to some embodiments of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a buffer protection device for a winding pressure roller according to some embodiments of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of a buffer protection device for a winding pressure roller according to some embodiments of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a buffer protection device for a winding pressure roller according to some embodiments of this utility model.

[0030] Icon labels:

[0031] Frame 100; fixed frame 110; sliding frame 120; second drive component 130; screw 131; drive motor 132; support base 133; slide block 140; take-up roller 150; pressure roller 160; first drive component 170;

[0032] Damper 200; Outer cylinder 210; Inner cylinder 220; Piston rod 230; Piston end 231; Spring 240; Annular channel 250; Annular baffle 260; First overflow hole 271; Second overflow hole 272; Annular support plate 280; Annular groove 290; Snap ring 291;

[0033] Front cavity 300; first cavity 301; second cavity 302; rear cavity 310; damping gap 320;

[0034] First solenoid valve 410; first connection port 411; second solenoid valve 420; second connection port 421. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0039] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0040] According to some embodiments of this utility model, refer to Figures 1 to 4 The buffer protection device for the take-up pressure roller includes a frame 100, a slide 140, a take-up roller 150, a pressure roller 160, a first drive component 170, and a damper 200. The slide 140 is slidably connected to the frame 100 in the front-to-back direction. The take-up roller 150 is rotatably connected to the frame 100 with its axis pointing left-to-right. The pressure roller 160 is arranged parallel to the take-up roller 150 and located behind it, and is rotatably connected to the slide 140. The first drive component 170 is mounted on the frame 100, with its drive end facing forward and connected to the slide 140. The first drive component 170 applies a forward preload to the pressure roller 160. The preload is the basic pressure for achieving tight winding, and the first drive component 170 provides a relatively constant and adjustable thrust. The first drive component 170 is preferably an element capable of outputting a stable force, such as a low-pressure long-stroke cylinder, a set of constant force springs 240, or a torque loading mechanism controlled by a servo motor, thereby ensuring that the pressure roller 160 always maintains effective contact with the film roll surface and provides basic venting and compaction functions. A damper 200 is mounted on the frame 100, with its movable end facing forward and connected to the slide block 140; when the pressure roller 160 moves backward, the damper 200 applies a forward damping force to the pressure roller 160. The faster the pressure roller 160 moves backward, the greater the reverse resistance generated by the damper 200. This allows the system to smoothly and gently absorb impacts caused by fluctuations in winding speed or uneven film thickness, preventing rapid retraction or vibration of the pressure roller 160, thereby achieving dynamic and stable control of the pressing process.

[0041] During the winding process, the first drive component 170 applies force to the pressure roller 160, enabling the pressure roller 160 to press firmly against the film on the winding roller 150. When the diameter of the winding roller 150 increases due to winding, the winding roller 150 applies force to the pressure roller 160, causing the pressure roller 160 and the slide block 140 to move backward relative to the frame 100. During this process, the first drive component 170 maintains a forward force on the pressure roller 160, allowing the pressure roller 160 to come into close contact with the film. At the same time, the pressure roller 160 is subjected to a damping force applied by the damper 200 during its backward movement. The constant preload provided by the first drive component 170 and the dynamic damping force provided by the damper 200 work together to form a composite force control system. The preload ensures that the pressure roller 160 can press the film firmly, while the damping force ensures that the pressure roller 160 can move backward stably. This avoids the problem that the rigid drive method cannot balance constant pressure and dynamic adaptability, making the pressure roller 160 move smoothly and gradually. The pressure applied by the pressure roller 160 to the film changes gradually and continuously, effectively avoiding the problem of uneven air discharge between layers or excessive local film rolling caused by sudden pressure changes. This results in a high-quality film roll with consistent internal and external tightness and neat end faces.

[0042] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The frame 100 includes a fixed frame 110, a sliding frame 120, and a second drive component 130. The sliding frame 120 is slidably connected to the fixed frame 110 in the front-back direction. The second drive component 130 drives the sliding frame 120 to slide in the front-back direction. A first drive component 170 and a damper 200 are both mounted on the sliding frame 120. A slide block 140 is slidably connected to the sliding frame 120 in the front-back direction. It is understood that before winding, the first drive component 170 can drive the sliding frame 120 to move in the front-back direction, thereby driving the slide block 140 and the pressure roller 160 to move in the front-back direction to adjust the initial distance between the pressure roller 160 and the take-up roller 150, thus adapting to various environments. For example, the pressure roller 160 can be quickly moved close to the core to begin winding, or quickly retreated to a safe distance after winding, facilitating unwinding operations and greatly improving production flexibility and automation.

[0043] Furthermore, refer to Figure 2The second driving component 130 includes a screw 131 and a drive motor 132. The axis of the screw 131 is in the front-to-back direction. The screw 131 is rotatably connected to the fixed frame 110. The drive motor 132 drives the screw 131 to rotate around its own axis. A support seat 133 is fixedly connected to the sliding frame 120. The support seat 133 is sleeved on the screw 131. The rotation of the screw 131 can drive the support seat 133 to move in the front-to-back direction. The drive motor 132 drives the screw 131 to rotate, thereby driving the support seat 133 to move along the axis of the screw 131, thereby driving the sliding frame 120 to move in the front-to-back direction. The drive motor 132 can be a stepper motor or a servo motor to achieve precise digital control of the position of the sliding frame 120, with a high degree of automation and reliable positioning.

[0044] According to some embodiments of this utility model, refer to Figure 3 and Figure 4 The damper 200 includes an outer cylinder 210, an inner cylinder 220, a piston rod 230, and a spring 240. The inner cavity of the inner cylinder 220 contains oil. The outer cylinder 210 and the inner cylinder 220 are coaxially arranged with their axes pointing in the front-to-back direction. The inner cylinder 220 is located inside the outer cylinder 210. The inner circumferential wall of the outer cylinder 210 and the outer circumferential wall of the inner cylinder 220 form an annular channel 250. The piston end 231 of the piston rod 230 is inserted into the inner cylinder 220 and slidably connected to it. The piston end 231 of the piston rod 230 divides the inner cavity of the inner cylinder 220 into a front cavity 300 and a rear cavity 310. The piston rod 230 is provided with an annular baffle 260, which is located inside the front cavity 300. The spring 240 is located inside the front cavity 300. The rear end of the spring 240 is connected to the inner circumferential wall of the inner cylinder 220, and the front end of the spring 240 is connected to the annular baffle 260. Spring 240 is a pre-compressed return spring 240. When the pressure roller 160 is subjected to force and retracts, spring 240 is further compressed, storing elastic potential energy and providing a portion of the restoring force proportional to the displacement, assisting the first drive component 170 in providing pre-tightening force. After the external force is removed, the elastic force of spring 240 can drive piston rod 230 to quickly return forward to reset.

[0045] The inner cylinder 220 is provided with a first overflow hole 271 and a second overflow hole 272. The first overflow hole 271 connects the front cavity 300 and the annular channel 250, and the second overflow hole 272 connects the rear cavity 310 and the annular channel 250. The first overflow hole 271 is located on the front side of the annular baffle 260. The annular baffle 260 divides the front cavity 300 into a first cavity 301 and a second cavity 302. There is a gap between the outer peripheral wall of the annular baffle 260 and the inner peripheral wall of the inner cylinder 220, which is a damping gap 320.

[0046] Preferred, refer to Figure 2The damper 200 also includes a first solenoid valve 410. The inner cylinder 220 has a first connection port 411, which connects the second chamber 302 and the annular channel 250. The first solenoid valve 410 is used to open or close the first connection port 411. The damper 200 also includes a second solenoid valve 420. The inner cylinder 220 has a second connection port 421, which connects the rear chamber 310 and the annular channel 250. The second solenoid valve 421 is used to open or close the second connection port 421. Opening the first connection port 411 allows the liquid in the second chamber 302 to flow quickly through the first connection port 411 to the annular channel 250. Opening the second connection port 421 allows the liquid in the rear chamber 310 to flow quickly through the second connection port 421 to the annular channel 250. The design of the first solenoid valve 410 and the second solenoid valve 420 upgrades the originally passive hydraulic damper 200 into an actively controllable electro-hydraulic damper 200. The operating mode of the damper 200 can be changed instantaneously by an electrical signal emitted by a PLC or other control system.

[0047] When the pressure roller 160 moves backward, thereby driving the piston rod 230 to move backward, the spring 240 is further compressed. The first solenoid valve 410 blocks the first connection port 411, and the second solenoid valve 420 opens the second connection port 421. The volume of the rear cavity 310 decreases, and the volume of the first cavity 301 increases. The oil squeezed out of the rear cavity 310 flows into the annular channel 250 through the second overflow hole 272 and the second connection port 421, and flows forward in the annular channel 250. Then, it enters the increasing first cavity 301 through the first overflow hole 271. As the volume of the first cavity 301 increases, it needs to be filled with oil, making the first cavity 301 a low-pressure area. The volume of the second cavity 302 remains unchanged, but the second cavity 302 moves backward as a whole. The oil in the second cavity 302 is connected to the low-pressure first cavity 301 only through the narrow gap between the annular baffle 260 and the inner peripheral wall of the inner cylinder 220. The pressure difference between the first chamber 301 and the second chamber 302 forces the oil in the second chamber 302 to flow at high speed through the damping gap 320 into the first chamber 301. This throttling process generates significant flow resistance, a result of the combined effects of the Bernoulli effect and viscous shear force. This causes the pressure in the second chamber 302 to be greater than the pressure in the first chamber 301. This pressure difference acts on the annular baffle 260, applying a forward hydraulic pressure opposite to the direction of movement of the piston rod 230, which is the damping force. It can be understood that the greater the speed of the piston rod 230, the greater the pressure difference between the first chamber 301 and the second chamber 302, forming a dynamically adjustable damping force. This allows the external thrust on the piston rod 230 to be smoothly absorbed, achieving smooth, slow movement. This adaptive characteristic enables compliant control; regardless of the rate of increase in the diaphragm roll diameter, the damper 200 provides appropriate resistance, effectively suppressing vibration and impact.

[0048] When the piston rod 230 moves forward to reset, the spring 240 begins to rebound, the first solenoid valve 410 opens the first connection port 411, and the second solenoid valve 420 blocks the second connection port 421. The volume of the first chamber 301 decreases, and the volume of the rear chamber 310 increases, requiring the addition of oil. Since the cross-sectional area of ​​the first connection port 411 is much larger than the damping gap 320 between the annular baffle 260 and the outer peripheral wall of the inner cylinder 220, the oil in the second cavity 302 enters the annular channel 250 through the first connection port 411 and flows backward and then enters the enlarging rear cavity 310 through the second overflow hole 272. The oil in the first cavity 301 is also squeezed, so that part of the oil in the first cavity 301 enters the annular channel 250 through the first overflow hole 271 and then enters the second cavity 302 or the rear cavity 310. The other part of the oil in the first cavity 301 enters the second cavity 302 through the damping gap 320, so that there is a backward damping force on the annular baffle 260, but it is much different from the forward damping force, so that the piston rod 230 returns to its forward position quickly.

[0049] According to some embodiments of this utility model, refer to Figure 4 The inner circumferential wall of the inner cylinder 220 is provided with an annular support plate 280, which is located behind the annular baffle 260. The rear end of the spring 240 is connected to the front end face of the annular support plate 280. The annular support plate 280 provides a stable fixed end for the spring 240, ensuring that the spring 240 is subjected to uniform force during reciprocating compression and will not skew or become unstable.

[0050] Preferably, the piston rod 230 passes through the annular support plate 280, and there is a large gap between the outer peripheral wall of the piston rod 230 and the inner peripheral wall of the annular support plate 280, allowing the oil to flow smoothly between the outer peripheral wall of the piston rod 230 and the inner peripheral wall of the annular support plate 280. This does not create additional throttling obstacles to the oil flow inside the front cavity 300, ensuring that the generation of damping force is mainly and uniquely determined by the preset damping gap 320, thereby making the performance of the damper 200 stable and controllable.

[0051] According to some embodiments of this utility model, refer to Figure 4 The piston rod 230 is provided with an annular groove 290, and the damper 200 also includes a retaining ring 291. The retaining ring 291 is located in the front cavity 300 and is sleeved on the piston rod 230. The inner side of the retaining ring 291 is inserted into the annular groove 290, and the front end face of the annular baffle 260 abuts against the rear end face of the retaining ring 291.

[0052] The working process of this utility model includes:

[0053] Before starting the winding operation, the operator, based on the specifications of the film to be produced and the initial diameter of the core, controls the second drive component 130 to move the sliding frame 120 in the back-and-forth direction. Since the first drive component 170, the damper 200, and the slide 140 with the pressure roller 160 are all mounted on the sliding frame 120, the entire pressure roller 160 assembly moves accordingly, thereby precisely positioning the pressure roller 160 to the optimal initial distance between it and the winding roller 150, completing the coarse adjustment positioning before operation.

[0054] Winding begins, and the film is wound onto the take-up roller 150. The first drive unit 170 is activated, applying a continuous and stable forward preload force to the slide 140. This force is transmitted through the slide 140 to the pressure roller 160, causing the pressure roller 160 to press firmly against the film surface at a set pressure, thus beginning to perform the basic functions of extruding air and compacting the film layer.

[0055] As winding progresses, the film roll diameter continuously increases, gradually pushing the pressure roller 160 backward. The pressure roller 160 drives the slide block 140 to slide backward relative to the sliding frame 120. At this time, the damper 200 enters the working state: its internal piston rod 230 moves backward with the slide block 140, the first solenoid valve 410 closes, and the second solenoid valve 420 opens. The movement of the piston rod 230 causes the hydraulic oil in the second chamber 302 of the inner cylinder 220 to flow at high speed through the narrow damping gap 320 between the annular baffle 260 and the wall of the inner cylinder 220 to the first chamber 301. This throttling process generates a strong damping force proportional to the backward speed of the piston rod 230, which is directed forward and opposite to the thrust of the film roll. At the same time, the internal spring 240 is also further compressed, providing additional elastic resistance. The damping force generated by this dynamic interaction, combined with the force of spring 240, smoothly counteracts the thrust caused by the increase in the film roll diameter, making the backward movement of pressure roller 160 extremely smooth and impact-free, achieving compliant following of the film roll. Throughout the process, the constant preload of the first drive component 170 is maintained, ensuring uninterrupted pressing between pressure roller 160 and the film roll.

[0056] When a roll of film is wound up or a roll change is required, the pressure roller 160 needs to quickly retract from the surface of the finished film roll to provide sufficient space for unwinding. The second drive component 130 drives the sliding frame 120 to move backward rapidly via a reverse motor. The first solenoid valve 410 and the second solenoid valve 420 are both open, minimizing the oil flow resistance inside the damper 200. After the new core is installed, the second drive component 130 then drives the sliding frame 120, the slide block 140, and the pressure roller 160 forward to their initial positions. The control system sets the damper 200 to a state where the first solenoid valve 410 is closed and the second solenoid valve 420 is open, and the first drive component 170 applies a forward force to the pressure roller 160, thereby completing the reset. In the description of this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A buffer protection device for a winding pressure roller, characterized in that, include: Rack (100); The slide (140) is slidably connected to the frame (100) in the front-back direction; The take-up roller (150) has its axis in the left-right direction and is rotatably connected to the frame (100). The pressure roller (160) is arranged parallel to the take-up roller (150) and located behind the take-up roller (150). The pressure roller (160) is rotatably connected to the slide block (140). A first drive component (170) is mounted on the frame (100). The drive end of the first drive component (170) faces forward and is connected to the slide (140). The first drive component (170) applies a forward preload force to the pressure roller (160). A damper (200) is mounted on the frame (100), with the movable end of the damper (200) facing forward and connected to the slide (140); when the pressure roller (160) moves backward, the damper (200) applies a forward damping force to the pressure roller (160).

2. The buffer protection device for the winding pressure roller according to claim 1, characterized in that, The frame (100) includes a fixed frame (110), a sliding frame (120), and a second drive component (130). The sliding frame (120) is slidably connected to the fixed frame (110) in the front-back direction. The second drive component (130) is used to drive the sliding frame (120) to slide in the front-back direction. The first drive component (170) and the damper (200) are both mounted on the sliding frame (120). The slide block (140) is slidably connected to the sliding frame (120) in the front-back direction.

3. The buffer protection device for the winding pressure roller according to claim 2, characterized in that, The second driving component (130) includes a screw (131) and a drive motor (132). The screw (131) is rotatably connected to the fixed frame (110). The drive motor (132) is used to drive the screw (131) to rotate around its own axis. A support seat (133) is fixedly connected to the sliding frame (120). The support seat (133) is sleeved on the screw (131). The rotation of the screw (131) can drive the support seat (133) to move in the front-back direction.

4. The buffer protection device for the winding pressure roller according to claim 1, characterized in that, The damper (200) includes an outer cylinder (210), an inner cylinder (220), a piston rod (230), and a spring (240). The inner cavity of the inner cylinder (220) contains oil. The outer cylinder (210) and the inner cylinder (220) are coaxially arranged with their axes pointing in the front-to-back direction. The inner cylinder (220) is located inside the outer cylinder (210). The inner circumferential wall of the outer cylinder (210) and the outer circumferential wall of the inner cylinder (220) form an annular channel (250). The piston end (231) of the piston rod (230) is inserted rearward into the inner cylinder (220) and slidably connected to it. The piston end (231) of the piston rod (230) divides the inner cavity of the inner cylinder (220) into a front cavity (300) and a rear cavity (310). The piston rod (230) is provided with an annular baffle (260), which is located inside the front cavity (300). The spring (240) is located inside the front cavity (300). The rear end of the spring (240) is connected to the inner circumferential wall of the inner cylinder (220), and the front end of the spring (240) is connected to the annular baffle (260). The inner cylinder (220) is provided with a first overflow hole (271) and a second overflow hole (272). The first overflow hole (271) connects the front cavity (300) and the annular channel (250), and the second overflow hole (272) connects the rear cavity (310) and the annular channel (250). The first overflow hole (271) is located on the front side of the annular baffle (260).

5. The buffer protection device for the winding pressure roller according to claim 4, characterized in that, The annular baffle (260) divides the front cavity (300) into a first cavity (301) and a second cavity (302), and there is a gap between the outer peripheral wall of the annular baffle (260) and the inner peripheral wall of the inner cylinder (220).

6. The buffer protection device for the winding pressure roller according to claim 5, characterized in that, The damper (200) further includes a first solenoid valve (410), the inner cylinder (220) is provided with a first connection port (411), the first connection port (411) connects the second cavity (302) and the annular channel (250), and the first solenoid valve (410) is used to open or block the first connection port (411).

7. The buffer protection device for the winding pressure roller according to claim 5, characterized in that, The damper (200) further includes a second solenoid valve (420), the inner cylinder (220) is provided with a second connection port (421), the second connection port (421) connects the rear cavity (310) and the annular channel (250), and the second solenoid valve (420) is used to open or block the second connection port (421).

8. The buffer protection device for the winding pressure roller according to claim 4, characterized in that, The inner wall of the inner cylinder (220) is provided with an annular support plate (280), the annular support plate (280) is located behind the annular baffle (260), and the rear end of the spring (240) is connected to the front end face of the annular support plate (280).

9. The buffer protection device for the winding pressure roller according to claim 8, characterized in that, The piston rod (230) passes through the annular support plate (280), and there is a gap between the outer peripheral wall of the piston rod (230) and the inner peripheral wall of the annular support plate (280).

10. The buffer protection device for the winding pressure roller according to claim 4, characterized in that, The piston rod (230) is provided with an annular groove (290), and the damper (200) further includes a retaining ring (291). The retaining ring (291) is located in the front cavity (300), and the retaining ring (291) is sleeved on the piston rod (230). The inner side of the retaining ring (291) is inserted into the annular groove (290), and the front end face of the annular baffle (260) abuts against the rear end face of the retaining ring (291).

Images