RTR winding and unwinding constant tension section difference mechanism

Abstract

The utility model relates to an RTR winding and unwinding segment difference mechanism, in particular to an RTR winding and unwinding constant tension segment difference mechanism. According to the technical scheme, the RTR winding and unwinding constant-tension segment difference mechanism comprises a segment difference structure, and two traction structures are arranged on the segment difference structure and include the tension segment difference traction structure and the balance segment difference traction structure. The material pulling and storing device has the advantages that the problem of large product expansion and contraction fluctuation caused by existing rapid material pulling and storing can be solved, and the problems of rapid material pulling and transmission direction reversal and jittering in the lifting process due to the forward and backward movement time interval difference of a material belt are solved. Real constant tension control over roll-to-roll material pulling, sudden stop and sudden start, material storage and forward and backward movement of a material belt of an RTR roll is achieved, the product quality can be improved, and the stability and controllability of the manufacturing process can be improved.

Description

Technical Field

[0001] The utility model relates to an RTR reeling and unreeling step difference mechanism, in particular to an RTR reeling and unreeling constant tension step difference mechanism. Background Art

[0002] The FPC circuit board industry and other industries now utilize a roll-to-roll (RTR) process. This mode of operation is suitable for many manufacturing processes because it offers higher efficiency, greater stability, and more controllable processes. However, a persistent issue in RTR roll-to-roll production is the material's expansion and contraction. The materials used are film or copper (thin copper foil is divided into rolled copper and electrolytic copper), with thicknesses ranging from 0.036mm to 0.2mm. Copper and film materials are inherently ductile. When subjected to external forces, these materials stretch and lengthen, a phenomenon known in the industry as expansion and contraction. If the applied force fluctuates within a fixed range, this expansion and contraction problem is not significant. However, if the applied force on the copper foil fluctuates, the material's expansion and contraction becomes unpredictable and uncontrollable. In this case, the material cannot be controlled even in the RTR roll-to-roll process, resulting in poor product quality. This problem is exacerbated by sudden material starts and stops.

[0003] Existing RTR roll-to-roll operations typically use a step-down mechanism or tension sensor structure to maintain tension. However, the step-down structure is weighted. The step-down wheel, combined with the fixing mechanism, the guide mechanism, and friction, will fall downward under the influence of gravity. The greater the weight of the step-down structure, the greater the pressure on the material. If a motor is used to pull the step-down structure upward, the rising and falling of the step-down requires switching the motor's direction. When the motor switches direction, the step-down structure will vibrate or fail to instantly flip the step-down, resulting in delays or jerks. These pauses, jerks, and jams can instantly affect the material's expansion and contraction, causing the rolled material product to lose constant tension, resulting in instantaneous tension or relaxation. During tension, the external force on the material fluctuates. Therefore, the existing step-down structure cannot maintain constant material tension, causing the material to be subjected to momentary increases or decreases in force during operation, resulting in material vibration, loosening, expansion, and contraction. Another approach is to use tension sensors, ultrasonic sensors, or displacement sensors to detect material expansion and contraction. However, these sensors cannot be used to detect material expansion and contraction during the sudden stop and start of the material roll because the sensor and motor cannot synchronize with the material during start and stop, causing the roll to be pulled out or slack instantly. Therefore, existing structures cannot address the expansion and contraction and stretching issues caused by sudden stop and start rolls during long or short distance material pulling. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the prior art and provide an RTR rewinding and unwinding constant tension step-difference mechanism. This mechanism can solve the problem of large fluctuations in product expansion and contraction caused by the existing step-difference structure during rapid material pulling and storage, and solve the problems of transmission direction reversal and jitter during the lifting and lowering of the step-difference structure during rapid material pulling and forward and backward movement of the material strip. This achieves true constant tension control during RTR roll-to-roll pulling, emergency stopping and starting, material storage, and forward and backward movement of the material strip.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An RTR rewinding and unwinding constant tension step mechanism includes a step structure, the step structure is provided with two sets of traction structures, the two sets of traction structures are respectively a tension step traction structure and a balance step traction structure, the step structure includes a step roller and a step roller assembly fixed on the roller shaft, the tension step traction structure includes two symmetrically arranged tension step traction belts, a tension step top pulley, a tension step bottom pulley, a tension step shaft, a tension step drive assembly, two symmetrically arranged tension step guide rails, a tension step guide slider and tension step sides. The feeding roller, the tension step difference top pulley and the tension step difference bottom pulley are respectively arranged on the top and bottom of the tension step difference traction belt, the two ends of the tension step difference shaft respectively pass through the tension step difference bottom pulleys on the two tension step difference traction belts, and the ends thereof are fixedly connected to the tension step difference driving assembly, the tension step difference guiding slider is slidably arranged on the tension step difference guiding slide rail, and the tension step difference guiding slider is connected to the tension step difference traction belt on the same side through a connecting block, and the two ends of the roller shaft of the step difference roller assembly are fixedly connected to the tension step difference guiding slider on the same side through a fixing piece;

[0007] The balanced segment differential traction structure includes a balanced segment differential traction belt, a balanced segment differential top pulley, a balanced segment differential bottom pulley, a balanced segment differential linear bearing assembly and a balanced segment differential drive assembly. The balanced segment differential top pulley and the balanced segment differential bottom pulley are respectively arranged at the top and bottom of the balanced segment differential traction belt, and the balanced segment differential bottom pulley is connected to the output shaft of the balanced segment differential drive assembly. The balanced segment differential traction belt is connected to the tension segment differential guide slider on the same side of it through a connecting block. The bearing body of the balanced segment differential linear bearing assembly passes through the center hole of the connecting block, and its upper and lower ends are supported and fixed by bearing seats.

[0008] Further technical solutions are:

[0009] The tension step-difference drive assembly and the balance step-difference drive assembly are both transmission motors connected to reducers.

[0010] Further technical solutions:

[0011] It also includes a fixed reinforcement member, both ends of which are respectively fixed to the connecting blocks of the tension step difference guide sliders on both sides.

[0012] The RTR rewinding and unwinding constant tension step difference mechanism provided by the utility model has the following beneficial effects compared with the prior art:

[0013] 1. The RTR rewinding and unwinding constant-tension step-difference mechanism of this utility model features two sets of traction mechanisms installed on the step-difference structure. One set of traction mechanisms balances the weight of the step-difference structure, applying a reverse pull to the step, allowing the step-difference roller to stop at any position. This eliminates the inherent weight of the step, bearing, and slider mechanism. The other set of traction mechanisms applies a downward pull to the step-difference structure, thereby tightening the product. This solves the problem of large fluctuations in product expansion and contraction caused by existing rapid material drawing and storage, and addresses the issues of drive direction reversal, jerking, and vibration during rapid material drawing and the time-difference lifting and lowering of the material strip during forward and backward movement. This achieves true constant tension control during RTR roll-to-roll drawing, emergency stops and starts, material storage, and forward and backward material strip movement.

[0014] 2. The RTR rewinding and unwinding constant tension step-difference mechanism of this utility model achieves constant tension for both the set tension and the actual tension output, which can reduce the stretching, extension, and expansion and contraction of the rolled material caused by step-difference direction switching or sudden stops and starts. This can improve product quality and enhance process stability and controllability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the side structure.

[0018] Among them, 1000, tension step difference traction structure, 1001, tension step difference traction belt, 1002, tension step difference top pulley, 1003, tension step difference bottom pulley, 1004, tension step difference shaft, 1005, tension step difference drive assembly, 1006, tension step difference guide rail, 1007, tension step difference guide slider, 1008, tension step difference material transfer rollers on both sides, 1009, fixed reinforcement, 1010, step difference roller assembly, 2000, balanced step difference traction structure, 2001, balanced step difference traction belt, 2002, balanced step difference top pulley, 2003, balanced step difference bottom pulley, 2004, balanced step difference linear bearing assembly, 2005, balanced step difference drive assembly. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate directions or positional relationships based on the attached figures. Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] As the first embodiment of the present invention, the present invention provides an RTR rewinding and unwinding constant tension step difference mechanism, including a step difference structure, wherein the step difference structure is provided with two sets of traction structures, and the two sets of traction structures are respectively a tension step difference traction structure 1000 and a balance step difference traction structure 2000, the step difference structure includes a step difference roller and a step difference roller assembly 1010 fixed on the roller shaft, the tension step difference traction structure 1000 includes two symmetrically arranged tension step difference traction belts 1001, a tension step difference top pulley 1002, a tension step difference bottom pulley 1003, a tension step difference shaft 1004, a tension step difference drive assembly 1005, two symmetrically arranged tension step difference guide rails 1006, a tension step difference guide The slider 1007 and the feeding rollers 1008 on both sides of the tension step difference, the tension step difference top pulley 1002 and the tension step difference bottom pulley 1003 are respectively arranged on the top and bottom of the tension step difference traction belt 1001, and the two ends of the tension step difference shaft 1004 respectively pass through the tension step difference bottom pulleys on the two tension step difference traction belts, and the ends thereof are fixedly connected to the tension step difference driving assembly, the tension step difference guiding slider 1007 is slidably set on the tension step difference guiding rail 1006, and the tension step difference guiding slider 1007 is connected to the tension step difference traction belt 1001 on the same side through a connecting block, and the two ends of the roller shaft of the step difference roller assembly are fixedly connected to the tension step difference guiding slider 1007 on the same side through fixing parts;

[0022] The balanced step-difference traction structure 2000 includes a balanced step-difference traction belt 2001, a balanced step-difference top pulley 2002, a balanced step-difference bottom pulley 2003, a balanced step-difference linear bearing assembly 2004, and a balanced step-difference drive assembly 2005. The balanced step-difference top pulley 2002 and the balanced step-difference bottom pulley 2003 are respectively arranged at the top and bottom of the balanced step-difference traction belt 2001, and the balanced step-difference bottom pulley 2003 is connected to the output shaft of the balanced step-difference drive assembly 2005. The balanced step-difference traction belt 2001 is connected to the tension step-difference guide slider 1007 on the same side thereof through a connecting block. The bearing body of the balanced step-difference linear bearing assembly 2004 passes through the center hole of the connecting block, and its upper and lower ends are supported and fixed by bearing seats. During operation, when the balanced step-difference traction structure 2000 pulls the step-difference structure, the bearing assembly 2004 plays a supporting and guiding role to ensure the stability and continuity of the step-difference structure.

[0023] Preferably, as the second embodiment of the present invention, this embodiment is a further improvement on the first embodiment. The balanced step-difference drive assembly 2005 is a transmission motor connected to a reducer. Of course, this drive assembly is not limited to reduction motors. A torque motor, a magnetic powder plus motor, a counterweight block, or the like can also be used to apply a reverse pulling force to the step-difference structure, allowing the step-difference roller to stop at any position, thereby eliminating the inherent weight of the step-difference structure, bearings, and slider components. In addition, the tension step-difference drive assembly 1005 is also a transmission motor connected to a reducer. Of course, this is not limited to reduction motors. A torque motor or a magnetic powder plus motor can also be used. In this case, a standard tension can be set for the magnetic powder or motor to tighten the product. This torque tension is a constant tension. During the feeding and traction period, the material will be pulled up or down under a fixed tension. The product material is always straightened and tightened.

[0024] Preferably, as the third embodiment of the present invention, this embodiment is a further improvement of the first embodiment. The RTR rewinding and unwinding constant tension step difference mechanism of the present invention also includes a fixed reinforcement member, which is a plate-shaped or stick-shaped long strip reinforcement rib, and its two ends are respectively fixed on the connecting blocks of the tension step difference guide sliders on both sides to enhance the strength and stability of the step difference structure during operation.

[0025] In the above embodiments, both traction mechanisms are implemented by traction belts in conjunction with pulleys. Of course, the actuators may also be implemented by synchronous belts, steel ropes, non-metallic ropes, and other actuators.

[0026] The working process and action principle of this utility model are as follows:

[0027] The principle behind this new structure is that it utilizes a balanced step-down traction structure (series 2000) to eliminate the weight and friction of the storage step-down structure and the step-down guide structure. Based on the weight of the different step-down structures, a reverse force is applied to the traction belt of the balanced step-down traction structure, pulling the step-down rollers in the opposite direction, thereby offsetting the weight and friction of the step-down structure. This allows the tension-free step-down traction structure (series 1000) to stop at any position at any time. Under normal circumstances, the step-down structure will freely fall after being pulled up. This design aims to address the weight issue of the step-down roller structure.

[0028] After the balanced step-difference traction structure (2000 series) offsets the weight of the storage step-difference mechanism, the tension step-difference traction structure (1000 series) can be set using fixed tension conditions or real-time feedback from a tension controller. The transmission output mechanism can utilize a torque motor, servo motor torque mode, or a magnetic powder motor configuration to achieve constant tension control. This control direction only requires applying downward force to the step-difference roller. Even if the required tension is less than the weight of the step-difference roller, the step-difference drive assembly of the 1000 series tension step-difference traction structure does not need to switch the force direction, thus achieving unidirectional force output and ensuring constant tension on the step-difference roller. (A common structure uses a switching drive mechanism to raise and lower the step-difference roller. This method results in switching delays, preventing the step-difference from keeping up with the speed of the material being pulled and pulled, resulting in problems such as jitter and jamming of the product strip, leading to abnormal product quality.)

[0029] During operation, the 2000 series balanced step-down traction mechanism pulls the step-down mechanism upward, preventing the step-down roller from free-falling without external force. Therefore, the 2000 series balanced step-down traction mechanism continuously applies force in a single direction, eliminating the need for switching transmission direction and preventing jerking or jamming. The 1000 series tension step-down traction mechanism pulls the step-down roller mechanism downward. The torque applied to the 1000 series transmission mechanism is derived from a set standard value (e.g., 1kg-20kg) or from real-time RTR web tension monitored by a tension sensor, controller, ultrasonic sensor, laser displacement sensor, or other detection mechanism. This real-time tension is fed back to the 1000 series tension step-down traction mechanism's actuator, which automatically adjusts the torque based on tension changes, thereby achieving constant tension. Therefore, the 1000 series tension step-down traction mechanism also continuously applies force in a single direction, eliminating the need for switching transmission direction and preventing jerking or jamming.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An RTR rewinding and unwinding constant tension step difference mechanism, characterized by: The invention comprises a step structure, wherein the step structure is provided with two groups of traction structures, the two groups of traction structures being respectively a tension step traction structure (1000) and a balance step traction structure (2000), the step structure comprising a step roller and a step roller assembly (1010) fixed on a roller shaft, the tension step traction structure (1000) comprising two symmetrically arranged tension step traction belts (1001), a tension step top pulley (1002), a tension step bottom pulley (1003), a tension step shaft (1004), a tension step drive assembly (1005), two symmetrically arranged tension step guide rails (1006), a tension step guide slider (1007), and tension step feeding rollers ( 1008), the tension step difference top pulley (1002) and the tension step difference bottom pulley (1003) are respectively arranged at the top and bottom of the tension step difference traction belt (1001), the two ends of the tension step difference shaft (1004) respectively pass through the tension step difference bottom pulleys on the two tension step difference traction belts, and the ends thereof are fixedly connected to the tension step difference driving assembly, the tension step difference guiding slider (1007) is slidably arranged on the tension step difference guiding slide rail (1006), and the tension step difference guiding slider (1007) is connected to the tension step difference traction belt (1001) on the same side through a connecting block, and the two ends of the roller shaft of the step difference roller assembly are fixedly connected to the tension step difference guiding slider (1007) on the same side through a fixing piece; The balanced segment differential traction structure (2000) comprises a balanced segment differential traction belt (2001), a balanced segment differential top pulley (2002), a balanced segment differential bottom pulley (2003), a balanced segment differential linear bearing assembly (2004) and a balanced segment differential drive assembly (2005). The balanced segment differential top pulley (2002) and the balanced segment differential bottom pulley (2003) are respectively arranged at the top and bottom of the balanced segment differential traction belt (2001). The balanced segment differential bottom pulley (2003) is connected to the output shaft of the balanced segment differential drive assembly (2005). The balanced segment differential traction belt (2001) is connected to the tension segment differential guide slider (1007) on the same side thereof through a connecting block. The bearing body of the balanced segment differential linear bearing assembly (2004) passes through the center hole of the connecting block, and its upper and lower ends are both supported and fixed by bearing seats.

2. The RTR rewinding and unwinding constant tension step difference mechanism according to claim 1, characterized in that: The tension step difference driving assembly (1005) and the balance step difference driving assembly (2005) are both transmission motors connected to a reducer.

3. The RTR rewinding and unwinding constant tension step difference mechanism according to claim 1, characterized in that: It also includes a fixed reinforcement member (1009), the two ends of which are respectively fixed to the connection blocks of the tension step difference guide sliders on both sides.

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