Self-adaptive tension transferring and pasting roller set structure suitable for circular knife machine

Abstract

The utility model discloses a self-adaptive tension transferring and pasting roller set structure suitable for a circular knife machine. The self-adaptive tension transferring and pasting roller set structure comprises a supporting frame, an upper roller set, a lower roller set, an eccentric bearing, an elastic adjusting assembly, a limiting assembly, a pressure sensing assembly, a fine adjustment mechanism, a control module, a proportional pressure valve and a return spring. The elastic adjusting assembly is composed of a spring set and a damping air cylinder and provides basic pressing and buffering adjusting functions. The pressure sensing assembly detects the tension of a membrane material through a tension detection wheel, and a signal adjusts the pressure of a damping cylinder through a proportional pressure valve via a control module to form closed-loop adjustment of the pressure between rollers; the eccentric bearing is matched with the return spring to ensure that the upper roller group swings and resets stably; the fine adjustment mechanism is used for setting a roller gap initial value. The structure can dynamically adjust the pressure between the rollers according to the tension change, improves the laminating stability, and is suitable for a high-speed film material transferring and laminating process.

Description

Technical Field

[0001] This utility model relates to the field of die-cutting equipment technology, and in particular to an adaptive tension transfer roller group structure suitable for a circular die-cutting machine. Background Technology

[0002] Existing rotary die-cutting and transfer equipment often uses fixed roller gaps or mechanically limited roller pressure adjustment during the workpiece peeling and transfer process. This method cannot adapt in real-time to pressure fluctuations caused by changes in film type, thickness, and tension during production, easily leading to bonding misalignment, wrinkling, indentation, or poor bonding, affecting finished product yield and production efficiency. Especially in high-speed transfer processes, the film tension fluctuates dramatically, making traditional fixed roller gap mechanisms difficult to adjust, limiting their adaptability, and lacking dynamic adjustment capabilities. Therefore, there is an urgent need to develop a transfer roller assembly structure with adaptive tension adjustment capabilities to effectively improve the adaptability and stability of the bonding process. Utility Model Content

[0003] The purpose of this utility model is to provide a solution to the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An adaptive tension transfer roller assembly structure suitable for a circular knife machine includes:

[0006] Support frame;

[0007] The upper and lower roller groups are arranged opposite each other to form a roller gap;

[0008] The upper roller assembly is hinged to the top of the support frame via an eccentric bearing and can swing vertically.

[0009] The elastic adjustment assembly includes a spring assembly and a damping cylinder, wherein the spring assembly provides a basic clamping force and the damping cylinder buffers tension fluctuations;

[0010] Pressure sensing components, including a tension detection wheel and a signal processing module;

[0011] The control module converts the tension signal output by the signal processing module into a target air pressure signal, and adjusts the pressure of the damping cylinder chamber through the proportional pressure valve to dynamically adjust the inter-roller pressure and form a closed-loop control of the inter-roller pressure.

[0012] Limiting components, including a limiting screw and a buffer washer;

[0013] The fine-tuning mechanism includes a fine-tuning screw and a leveling seat.

[0014] Preferably, the proportional pressure valve is connected to the damping cylinder via a pneumatic pipeline with an inner diameter of 6mm to 10mm, a total length of no more than 2 meters, and a gas source pressure of 0.05MPa to 0.30MPa.

[0015] Preferably, the control module adopts a proportional-integral (PI) control algorithm, with a proportional coefficient Kp of 0.5 to 2.0, an integral coefficient Ki of 0.1 to 1.0, a control system response time of less than 100ms, and a pressure control accuracy of ±5N.

[0016] Preferably, the eccentric bearing is provided with a return spring, which provides a return torque of 2 to 5 Nm.

[0017] Preferably, the surfaces of the lower roller assembly and the upper roller assembly are covered with a polyurethane anti-slip and wear-resistant layer with a thickness of 3 to 5 mm and a hardness of Shore A 70 to 85 degrees.

[0018] Preferably, the piston displacement adjustment accuracy of the damping cylinder is 0.01mm, the buffer response time is 50 to 150ms, and the buffer tension fluctuation amplitude is ±10%.

[0019] Preferably, the fine-tuning mechanism is used to adjust the initial value of the roller gap before production, with an adjustment stroke of 0 to 5 mm and an adjustment accuracy of less than 0.1 mm.

[0020] Preferably, the control module is implemented using a PLC controller, a microcontroller, or an industrial control card platform, and the control program is stored in a built-in programmable memory.

[0021] Preferably, the adaptive tension transfer roller assembly structure is applied to the film transfer process of a high-speed rotary die-cutting equipment.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. This adaptive tension transfer roller assembly structure for rotary knives introduces elastic adjustment components and pressure sensing components into the transfer roller assembly structure, which can dynamically adjust the pressure between the rollers in real time according to the changes in film tension. This avoids the problems of bonding offset, wrinkling or indentation caused by material thickness or tension fluctuations in traditional fixed roller gap structures, and significantly improves bonding accuracy and finished product yield.

[0024] 2. This adaptive tension transfer roller assembly structure, suitable for circular knife machine, adopts a combination of spring and damping cylinder adjustment method. While providing basic bonding pressure, it effectively buffers the pressure impact caused by instantaneous tension fluctuations during high-speed operation, ensuring bonding stability during high-speed continuous production, greatly reducing debugging difficulty, and improving production efficiency and equipment adaptability. Attached Figure Description

[0025] Figure 1This is a three-dimensional schematic diagram of the overall structure of the adaptive tension transfer roller assembly of this utility model;

[0026] Figure 1a for Figure 1 A magnified schematic diagram of a portion of the fine-tuning mechanism;

[0027] Figure 2 This is a schematic diagram of the elastic adjustment component structure;

[0028] Figure 3 This is a schematic diagram of the pressure sensing component structure;

[0029] Figure 4 This is a schematic diagram of an eccentric bearing and a return spring.

[0030] Figure 5 This is a schematic diagram of the limit component structure;

[0031] Figure 6 The control feedback system closed-loop control logic block diagram;

[0032] Figure 7 This is a schematic diagram of the upper roller swinging back to center under the action of the return spring.

[0033] In the diagram: 1. Support frame; 2. Lower roller assembly; 3. Upper roller assembly; 4. Eccentric bearing; 5. Elastic adjustment assembly; 51. Spring assembly; 52. Damping cylinder; 6. Limiting assembly; 61. Limiting screw; 62. Buffer washer; 7. Pressure sensing assembly; 71. Tension detection wheel; 72. Signal processing module; 8. Fine-tuning mechanism; 81. Fine-tuning screw; 82. Leveling seat; 9. Control module; 10. Proportional pressure valve; 11. Return spring; A. Roller gap; B. Feeding direction. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figures 1 to 7 As shown, an adaptive tension transfer roller assembly structure suitable for a circular knife machine includes a support frame 1, a lower roller assembly 2, an upper roller assembly 3, an eccentric bearing 4, an elastic adjustment component 5, a limit component 6, a pressure sensing component 7, a fine-tuning mechanism 8, a control module 9, a proportional pressure valve 10, and a return spring 11, etc.

[0036] The support frame 1 adopts a frame-type steel structure and is installed on the worktable of the circular knife machine to support the overall roller assembly structure and its components. The top of the support frame 1 is equipped with guide holes and a connecting base to facilitate the stable installation and adjustment of each component.

[0037] The lower roller assembly 2 is fixedly installed at the lower part of the support frame 1. Its roller body is made of solid steel roller shaft, covered with a high-polymer polyurethane anti-slip and wear-resistant layer, preferably 35mm thick and with a Shore A hardness of 7085 degrees, which effectively improves the guiding and bonding stability of the film material and prevents scratches or slippage on the film material surface. The two ends of the lower roller assembly 2 are supported by high-precision ball bearings and locked in the bearing seats inside the support frame 1 to ensure smooth operation and long service life.

[0038] The upper roller assembly 3 is hinged to the top crossbeam of the support frame 1 via an eccentric bearing 4, forming a variable roller gap A. The eccentricity of the eccentric bearing 4 is preferably set to 38mm, allowing the upper roller assembly 3 to float up and down within a vertical swing angle range of ±3°. To ensure stability after swinging, return springs 11 are provided on both sides of the eccentric bearing 4. The return springs 11 provide a return torque of 25Nm, ensuring that the upper roller assembly 3 quickly and automatically returns to center after no load or disturbance.

[0039] The elastic adjustment assembly 5 includes a spring group 51 and a damping cylinder 52, which are integrally arranged between the top of the upper roller group 3 and the support frame 1. The spring group 51 adopts multiple sets of high-strength helical compression springs in parallel configuration, with each set of springs having a rated preload of 20N-80N, providing basic bonding pressure and ensuring stable initial bonding of the film material. The damping cylinder 52 is connected to the proportional pressure valve 10 via a pneumatic pipeline with an inner diameter of Φ6mm-Φ10mm and a total length not exceeding 2 meters. The air source is industrial standard compressed air, with a working pressure range of 0.05MPa-0.30MPa. The damping cylinder 52 is used for dynamically and flexibly adjusting the inter-roller pressure, buffering film tension fluctuations, with a piston displacement adjustment accuracy of 0.01mm, a buffer response time controlled within 50-150ms, and dynamic buffering capable of withstanding ±10% instantaneous tension fluctuations.

[0040] The limiting components 6 are located at both ends of the top of the support frame 1, including the limiting screw 61 and the buffer washer 62. The limiting screw 61 is used to limit the maximum lifting stroke of the upper roller group 3. The buffer washer 62 is made of silicone rubber material, which effectively absorbs the residual impact energy at the end of the stroke and prevents damage to the mechanism.

[0041] The pressure sensing component 7 is located on the feed side of the support frame 1 and includes a tension detection wheel 71 and a signal processing module 72. The tension detection wheel 71 adopts a floating swing arm structure to sense the tension of the membrane material in real time. The signal processing module 72 amplifies, filters, and standardizes the detection signal, and outputs a standard voltage signal to the control module 9.

[0042] Control module 9 receives tension data from signal processing module 72 and uses a proportional-integral (PI) control algorithm to calculate the control signal. The proportional coefficient Kp is set to 0.5-2.0, and the integral coefficient Ki is set to 0.1-1.0. The system has a preset tension-pressure mapping curve. The PI control logic calculates the target air pressure signal in real time based on the tension deviation and controls the proportional pressure valve 10 to adjust the intake pressure of the damping cylinder 52, achieving closed-loop regulation of the roller pressure. The control system has a response time of less than 100ms, a steady-state control accuracy of ±5N, and dynamically follows high-speed tension fluctuations to ensure stable bonding pressure. Control module 9 can be implemented using an industrial PLC, microcontroller, or industrial motion control card platform, with the hardware program stored in the built-in programmable memory.

[0043] The fine-tuning mechanism 8 is located at the top center of the support frame 1, and includes a fine-tuning screw 81 and a leveling seat 82. Before production, according to the film thickness and initial bonding requirements, the roller gap is preset and adjusted by rotating the fine-tuning screw 81 to drive the leveling seat 82. The adjustment stroke range is 0-5mm, and the adjustment accuracy is within 0.1mm, ensuring rapid switching settings for different specifications of film materials.

[0044] In practical operation, the basic value of the roller gap A is first set through the fine-tuning mechanism 8. Then, the film material enters the tension detection wheel 71 through the feeding direction B. The tension signal is transmitted to the control module 9 in real time. The control module 9 dynamically adjusts the proportional pressure valve 10 to control the pressure of the damping cylinder 52 through the PI algorithm, ultimately realizing closed-loop control of dynamic automatic adjustment of the inter-roller pressure. The entire bonding process is stable, responsive, and sufficiently buffered, which can significantly reduce bonding defects and improve product consistency and equipment stability.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adaptive tension transfer roller assembly structure suitable for a circular knife machine, characterized in that, include: Support frame (1); The upper roller group (3) and the lower roller group (2) are arranged opposite each other to form a roller gap (A); The upper roller assembly (3) is hinged to the top of the support frame (1) via an eccentric bearing (4) and can swing in the vertical direction; The elastic adjustment assembly (5) includes a spring assembly (51) and a damping cylinder (52), wherein the spring assembly (51) provides a basic clamping force and the damping cylinder (52) buffers tension fluctuations; The pressure sensing component (7) includes a tension detection wheel (71) and a signal processing module (72); The control module (9) converts the tension signal output by the signal processing module (72) into a target air pressure signal, and adjusts the air chamber pressure of the damping cylinder (52) through the proportional pressure valve (10) to dynamically adjust the inter-roller pressure and form an inter-roller pressure closed-loop control. The limiting assembly (6) includes a limiting screw (61) and a buffer washer (62); The fine-tuning mechanism (8) includes a fine-tuning screw (81) and a leveling seat (82).

2. The adaptive tension transfer roller assembly structure suitable for a circular knife machine according to claim 1, characterized in that: The proportional pressure valve (10) is connected to the damping cylinder (52) through a pneumatic pipeline. The inner diameter of the air pipeline is 6mm to 10mm, the total length of the air pipeline does not exceed 2 meters, and the air source pressure is 0.05MPa to 0.30MPa.

3. The adaptive tension transfer roller group structure suitable for a circular knife machine according to claim 1, characterized in that: The control module (9) adopts a proportional-integral (PI) control algorithm, with a proportional coefficient Kp ranging from 0.5 to 2.0 and an integral coefficient Ki ranging from 0.1 to 1.

0. The control system response time is less than 100ms, and the pressure control accuracy is ±5N.

4. The adaptive tension transfer roller group structure suitable for a circular knife machine according to claim 1, characterized in that: The eccentric bearing (4) is provided with a return spring (11) that provides a return torque of 2 to 5 Nm.

5. The adaptive tension transfer roller group structure suitable for a circular knife machine according to claim 1, characterized in that: The surfaces of the lower roller group (2) and the upper roller group (3) are covered with a polyurethane anti-slip and wear-resistant layer with a thickness of 3 to 5 mm and a hardness of Shore A 70 to 85 degrees.

6. The adaptive tension transfer roller assembly structure suitable for a circular knife machine according to claim 1, characterized in that: The piston displacement adjustment accuracy of the damping cylinder (52) is 0.01mm, the buffer response time is 50 to 150ms, and the buffer tension fluctuation amplitude is ±10%.

7. The adaptive tension transfer roller group structure suitable for a circular knife machine according to claim 1, characterized in that: The fine-tuning mechanism (8) is used to adjust the initial value of the roller gap (A) before production. The adjustment stroke is 0 to 5 mm, and the adjustment accuracy is within 0.1 mm.

8. The adaptive tension transfer roller group structure suitable for a circular knife machine according to claim 1, characterized in that: The control module (9) is implemented using a PLC controller, microcontroller or industrial control card platform, and the control program is stored in the built-in programmable memory.

9. The adaptive tension transfer roller assembly structure suitable for a circular knife machine according to claim 1, characterized in that: The adaptive tension transfer roller assembly structure is applied to the film transfer process of a high-speed circular die-cutting equipment.

Images