A copper foil roll bottom coating material divides and rewinds device

Abstract

The utility model discloses a kind of copper foil roll bottom base material's division and rewinding device, including bracket seat, the upper side of the bracket seat is provided with unwinding station and winding station side by side, the unwinding station includes a pair of unwinding air expansion axle being arranged on bracket seat and unwinding motor being arranged on the axial side of unwinding air expansion axle, the winding station includes quick limiting device being arranged on bracket seat and winding motor being arranged on the side of quick limiting device, the unwinding air expansion axle between detachably erected with unwinding axle, the quick limiting device between detachably installed with winding axle. The utility model utilizes film to reduce copper foil scrap, improve the final yield of product, can overcome the above-mentioned deficiencies of prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of copper foil production equipment, specifically a device for slitting and rewinding copper foil roll bottom material. Background Technology

[0002] Electrolytic copper foil, a key basic material in the field of electronic circuit boards, has a relatively mature production process. Currently, the industry mainly uses the roller continuous electrolysis method for large-scale production. A typical process flow includes solution preparation, solution purification and process parameter control, additive addition, foil production using a foil-making machine, post-processing (this step is not required for lithium battery copper foil due to its product characteristics), and slitting and packaging. In the above continuous production process, to ensure the continuity of copper foil traction and the stability of the foil production process, necessary operational steps such as traction through the roller system, increasing speed, increasing current, and increasing tension must be performed. However, these operational steps inevitably generate a fixed amount of copper foil scrap. This fixed scrap not only directly reduces the final yield of copper foil products but also leads to unnecessary processing costs during production, significantly compressing the profit margin of finished products. This has become an important factor restricting electrolytic copper foil manufacturers from improving quality and reducing costs.

[0003] To address the aforementioned copper foil scrapping issue, the industry has gradually explored using polyimide film as the traction base material for copper foil rolls, hoping to reduce direct copper foil loss in key processes through the physical support and traction assistance of the film. However, in existing technologies, the pre-treatment of the polyimide film, such as slitting and wrapping, as well as subsequent rewinding, relies entirely on manual operation. This method has insurmountable drawbacks: First, during manual wrapping, uneven stress on the film can easily lead to loosening and misalignment, resulting in insufficient adhesion between the film and the copper foil. This not only fails to achieve the expected traction assistance effect but may also exacerbate the risk of copper foil scrapping due to film misalignment. Second, manual operation lacks precise measurement methods, making it impossible to strictly control the length of film rolls and match the process requirements of different specifications and production batches of copper foil, easily leading to waste or shortage of film materials. Third, manual processing is inefficient, requires significant labor costs, and the quality of operation is greatly affected by the experience and skill of the personnel, resulting in poor stability and further increasing the uncertainty and overall cost of the production process.

[0004] In summary, the current electrolytic copper foil production industry faces two main challenges: firstly, the inherent characteristics of the process lead to a fixed amount of copper foil scrap; secondly, there is a lack of specialized equipment to support the processing of polyimide film backing materials, and manual operation has significant limitations. Therefore, developing a dedicated device capable of precise slitting and rewinding of polyimide film to address the technical deficiencies in film processing and indirectly reduce copper foil scrap is a key requirement for optimizing the electrolytic copper foil production process. Utility Model Content

[0005] This invention provides a device for slitting and rewinding copper foil roll base material, which can reduce copper foil scrap by using thin film, improve the final yield of the product, and overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a slitting and rewinding device for copper foil roll bottom coating material, comprising a support base, with an unwinding station and a rewinding station arranged side-by-side on the upper side of the support base. The unwinding station includes a pair of unwinding air shafts mounted on the support base and an unwinding motor mounted on one axial side of the unwinding air shafts. The rewinding station includes a quick-stop device mounted on the support base and a rewinding motor mounted on one side of the quick-stop device. An unwinding shaft is detachably mounted between the unwinding air shafts, and a rewinding motor is detachably mounted between the quick-stop devices. The roll and unwinding air-expansion shaft can stably clamp the film master roll, preventing it from shifting due to loosening during unwinding. The quick-stop device at the rewinding station can accurately position the rewinding shaft, preventing it from moving during rewinding. The unwinding and rewinding motors replace manual drives, achieving uniform speed control during the film winding process and avoiding fluctuations in winding quality caused by uneven manual operation. The overall structure is an integrated design for slitting and rewinding, which can complete both operations without additional equipment. This indirectly reduces copper foil scrap caused by improper film handling in copper foil production, improves copper foil yield, and reduces processing costs.

[0007] Preferably, the support base also includes auxiliary supports extending outward from the side. The unwinding motor and the winding motor are mounted on the corresponding auxiliary supports via motor mounting brackets. The auxiliary supports provide independent and stable support for the motors, preventing vibrations generated during motor operation from being directly transmitted to the main body of the support base. This prevents the unwinding and winding shafts from shifting due to vibrations, ensuring the stability of film winding. The motor mounting brackets enable precise positioning and installation of the motors, ensuring that the motor spindle is aligned with the axes of the unwinding and winding shafts. This avoids transmission jamming or film winding shifting caused by shaft misalignment, improving the reliability of equipment operation.

[0008] Preferably, both the unwinding motor and the winding motor are equipped with couplings on their main shafts. The couplings achieve a rigid connection between the motor main shaft and the unwinding and winding shafts, ensuring accurate and stable transmission of motor power, avoiding slippage or loss of rotation during transmission, ensuring that the unwinding and winding speeds are consistent with the set values, and improving the uniformity of film winding.

[0009] Preferably, the quick-closing device includes a limiting seat mounted on a bracket and a limiting rocker arm hinged to the limiting seat. The limiting rocker arm is L-shaped, with one end hinged to the upper end of the limiting seat and the other end equipped with a clamping screw. The L-shaped limiting rocker arm hinged to the limiting seat allows for quick opening and closing. When open, it facilitates the insertion or removal of the winding shaft, and when closed, it quickly limits the winding shaft. Compared with the traditional bolt fixing method, this significantly shortens the shaft loading and unloading time and improves work efficiency. The clamping screw at the end of the limiting rocker arm can be tightened after the limiting rocker arm is closed to form axial or radial pressure on the winding shaft, preventing axial movement or radial wobbling of the winding shaft during winding, ensuring winding neatness, and solving the problem of winding misalignment.

[0010] Preferably, the quick-stop device further includes a fixing block installed on the upper side of the stop seat. An adjusting screw is transversely disposed in the fixing block. One end of the adjusting screw passes through the side wall of the stop seat and corresponds to the clamping screw. The adjusting screw can laterally press against the winding shaft from the side wall of the stop seat, and work together with the clamping screw to achieve multi-directional positioning of the winding shaft, completely eliminating the slight displacement of the winding shaft during high-speed winding and further improving the winding accuracy.

[0011] Preferably, the upper side of the bracket is provided with a groove at the position where the quick limiting device is installed. The quick limiting device is embedded in the groove. The groove can accurately position the installation position of the quick limiting device. At the same time, the groove can axially limit the bearing on the winding shaft, so as to avoid the winding shaft tilting due to the misalignment of the limiting device and ensure the flatness of the film winding.

[0012] Preferably, a meter counter mounting bracket is installed on one side of the bracket base located at the winding station. The meter counter mounting bracket provides a fixed installation position for the meter counter, ensuring that the detection end of the meter counter is precisely aligned with the film winding path, avoiding measurement errors caused by positional deviation of the meter counter, realizing precise control of the number of rolls, and solving the problem of inaccurate meter count during manual operation.

[0013] Compared with the prior art, the beneficial effects of this utility model are: With a simple structure, this device can slit and rewind film materials, saving on packaging and transportation costs for incoming small rolls. The mother roll film is placed on the unwinding air shaft and connected to a motor via a coupling, pulling the film to the take-up stainless steel shaft, thus enabling the slitting of the mother roll film. The length is precisely controlled by a meter counter. At the same time, it can also rewind rolled film or copper foil, using the current take-up shaft for unwinding and the unwind shaft for rewinding, thus achieving film rewinding. The film can be reused, saving on film material costs and incoming material costs, and reducing operating costs. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural diagram based on the present invention; Figure 2 This is a top view structural diagram based on the present invention; Figure 3 yes Figure 2 AA-direction sectional view of the structure; Figure 4 yes Figure 3 Enlarged structural diagram at point B.

[0015] Figure label: 1. Support base, 2. Auxiliary support, 3. Unwinding shaft, 4. Unwinding motor, 5. Unwinding air shaft, 6. Rewinding shaft, 7. Quick stop device, 71. Limiting seat, 72. Limiting rocker arm, 73. Clamping screw, 74. Fixing block, 75. Adjusting screw, 8. Rewinding motor, 9. Meter counter mounting bracket, 10. Motor mounting base. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] This invention addresses the technical problem of the lack of dedicated equipment for processing polyimide film base materials in existing technologies. For example... Figure 1-4 As shown, the following technical solution is provided: a slitting and rewinding device for copper foil roll base material, including a support base 1. An unwinding station and a rewinding station are arranged side-by-side on the upper side of the support base 1. The unwinding station includes a pair of unwinding air shafts 5 mounted on the support base 1 and an unwinding motor 4 mounted on one axial side of the unwinding air shafts 5. The rewinding station includes a quick-stop device 7 mounted on the support base 1 and a rewinding motor 8 mounted on one side of the quick-stop device 7. An unwinding shaft 3 is detachably mounted between the unwinding air shafts 5, and a quick-stop device 7 is detachably installed between them. The take-up shaft 6 and the unwinding air-expansion shaft 5 can stably clamp the film master roll, preventing it from shifting due to loosening during unwinding. The quick-stop device at the take-up station can accurately position the take-up shaft, preventing it from shifting during the take-up process. The unwinding motor and take-up motor replace manual drive, achieving uniform speed control during the film winding process and avoiding fluctuations in winding quality caused by uneven manual operation. The overall structure is an integrated design for slitting and rewinding, which can complete both operations without additional equipment. This indirectly reduces copper foil scrap caused by improper film handling in copper foil production, improves the copper foil yield, and reduces processing costs.

[0018] Specifically, the unwinding air shaft 5 achieves adaptive clamping of the film master roll through inflation, and the clamping force can be precisely controlled by the inflation pressure. The unwinding motor 4 and the winding motor 8 adopt a synchronous speed regulation design, with a speed range of 5-50 r / min. The motor torque feedback compensates for film tension fluctuations in real time, completely solving the problems of loosening and miswinding caused by uneven manual operation. The support base 1 is welded from Q235 low carbon steel channel steel, with overall dimensions of 2200mm (length) × 850mm (width) × 700mm (height), suitable for conventional workshop operating space. The bottom of the support base 1 can be welded with four leveling feet. The unwinding air shaft 5 uses a keyed air shaft (model: ZHQ-80), with deep groove ball bearings installed at both ends of the shaft. The outer ring of the bearing is interference-fitted with the bearing hole on the support base.

[0019] When using, follow these steps: 1. Insert the unwinding shaft into the film master roll (Φ500mm, polyimide film thickness 25μm), and mount both ends on the bearing seats of the unwinding air shaft; 2. Inflate the unwinding air shaft and fix the master roll by the keyway protrusion of the air shaft; 3. Place the take-up shaft into the limit seat of the quick-release device; 4. Connect the unwinding motor to the unwinding shaft and the take-up motor to the take-up shaft to complete the initial assembly.

[0020] In this embodiment, the support base 1 further includes an auxiliary support 2 extending outward from the side. The unwinding motor 4 and the winding motor 8 are mounted on the corresponding auxiliary support 2 via a motor mounting base 10. The auxiliary support 2 provides independent and stable support for the motor, preventing the vibration generated during motor operation from being directly transmitted to the support base body, thereby preventing the unwinding and winding shafts from shifting due to vibration and ensuring the stability of film winding. The motor mounting base enables precise positioning and installation of the motor, ensuring that the motor spindle is aligned with the axes of the unwinding and winding shafts, avoiding transmission jamming or film winding offset caused by shaft misalignment, and improving the reliability of equipment operation.

[0021] In this embodiment, couplings are provided on the main shafts of both the unwinding motor 4 and the take-up motor 8. The couplings achieve a rigid connection between the motor main shaft and the unwinding and take-up shafts, ensuring accurate and stable transmission of motor power, avoiding slippage and loss of rotation during transmission, ensuring that the unwinding and take-up speeds are consistent with the set values, and improving the uniformity of film winding. Specifically, an XL3 type flexible coupling is selected, which can compensate for radial deviation, angular deviation and axial deviation of the shaft system, prevent the impact load during motor start-up and stop from being directly transmitted to the shaft, and extend the service life of the unwinding and take-up shafts.

[0022] In this embodiment, the quick-closing device 7 includes a limiting seat 71 mounted on the bracket 1 and a limiting rocker arm 72 hinged to the limiting seat 71. The limiting rocker arm 72 is L-shaped, with one end hinged to the upper end of the limiting seat 71 and the other end of the limiting rocker arm 72 equipped with a clamping screw 73. The L-shaped limiting rocker arm 72 is hinged to the limiting seat 71, enabling quick opening and closing. When open, it facilitates the insertion or removal of the winding shaft, and when closed, it quickly limits the winding shaft. Compared with the traditional bolt fixing method, it significantly shortens the shaft loading and unloading time and improves work efficiency. The clamping screw 73 at the end of the limiting rocker arm can be tightened after the limiting rocker arm 72 is closed to form axial or radial pressure on the winding shaft, preventing axial movement or radial shaking of the winding shaft during winding, ensuring winding neatness, and solving the problem of winding misalignment. Specifically, the L-shaped limiting rocker arm 72 adopts a pin hinge and gravity swing structure, and the opening and closing angle of the rocker arm can reach 90°. When open, it is convenient to quickly insert the winding shaft 6. When closed, it is locked by the clamping screw. The entire operation time is ≤10s, which improves the work efficiency.

[0023] In this embodiment, the quick-stop device 7 further includes a fixing block 74 installed on the upper side of the limiting seat 71. An adjusting screw 75 is laterally disposed in the fixing block 74. One end of the adjusting screw 75 passes through the side wall of the limiting seat 71 and corresponds to the clamping screw 73. The adjusting screw 75 can laterally press against the winding shaft from the side wall of the limiting seat 71, and cooperate with the clamping screw to achieve multi-directional positioning of the winding shaft, completely eliminating the slight displacement of the winding shaft during the high-speed winding process, and further improving the winding accuracy.

[0024] In this embodiment, a groove is provided on the upper side of the bracket 1 at the position where the quick limiting device 7 is installed. The quick limiting device 7 is embedded in the groove, which can accurately position the installation position of the quick limiting device 7. At the same time, the groove can axially limit the bearing on the winding shaft 6, so as to avoid the winding shaft tilting due to the misalignment of the limiting device and ensure the flatness of the film winding.

[0025] In this embodiment, a counter mounting bracket 9 is installed on one side of the bracket base 1 at the winding station. The counter mounting bracket 9 provides a fixed installation position for the counter, ensuring that the detection end of the counter is precisely aligned with the film winding path, avoiding measurement errors caused by positional deviation of the counter, achieving precise control of the number of rolls, and solving the problem of inaccurate meter readings during manual operation. Specifically, when using it, follow these steps: 1. Fix the counter mounting bracket 9 to the right side of the winding station with hexagonal screws, 150mm away from the winding shaft axis; 2. Fix the wheel-type counter (model: JM-LX-5) to the elongated hole of the bracket with screws, and adjust the height of the counter so that the detection roller is in contact with the film surface; 3. Calibrate the counter with a standard measuring tape: manually pull the film to move 10m, and the counter display value should be 9.99-10.01m. If it exceeds the tolerance, adjust it through the calibration button of the counter until the accuracy requirements are met.

[0026] As one specific implementation scheme in this embodiment: I. Implementation Process of Volume Division (1) Preliminary preparation Select a polyimide film master roll (Φ500mm, width 1000mm, thickness 25μm) and check that the surface of the master roll is free of wrinkles and damage; Inflate the unwinding air shaft 5 with air and confirm that the key bar on the air shaft is protruding. Set the winding parameters on the control panel: rotation speed 20r / min, winding length 1000m, tension compensation value 8N.

[0027] (2) Operation Manually thread the film master roll into the unwinding shaft 3, with both ends mounted on the bearing seats of the unwinding air shaft 5, and close the air shaft inflation valve; Operate the cylinder control button to engage the unwinding and rewinding couplings; The free end of the traction film is wound around the surface of the take-up shaft; Press the "Start" button on the control panel and the equipment will start running: the unwinding motor drives the master roll to unwind, the rewinding motor winds it up synchronously, and the meter counter displays the length in real time; During operation, the PLC compensates for tension in real time. If the film is too loose, the torque of the winding motor is automatically increased; if it is too tight, the torque is reduced. When the meter reaches 1000m, the equipment automatically stops, the cylinder is operated to unlock the coupling, and the L-shaped limit rocker arm 72 is opened to take out the slitting film roll.

[0028] (3) Post-work inspection To inspect the quality of rewound film: 1. Measure radial runout with a dial indicator; 2. Measure axial runout; 3. Measure the degree error with a measuring tape. Clean the surface of the equipment to remove any remaining film or debris, and check that all parts are secure.

[0029] II. Re-writing Operation Implementation Process (1) Preliminary preparation Select the scrambled film roll, that is, the original roll that was scrambled during transportation, and use it as the "master roll to be rewound"; Switching device modes: Press the "Rewind Mode" button on the operation panel, and the PLC will automatically switch the motor rotation direction, turning the take-up motor into the unwind motor and the unwind motor into the take-up motor. Set the rewinding parameters: rotation speed 15 r / min, rewinding tension 10 N.

[0030] (2) Operation The original winding end becomes the unwinding end. The rolled film is threaded into the winding shaft, the L-shaped rocker arm is closed and the clamping screw is tightened. The adjusting screw is then screwed in to tighten it. Install an empty take-up shaft at the original unwinding end, and inflate the unwinding air shaft to clamp it. The free end of the traction film is pulled around the take-up shaft at the original unwinding end and secured with tape; Start the equipment, the winding motor drives the unwinding film to feed the material, the unwinding motor synchronously winds it up, and the meter counter records the rewinding length; During rewinding, the position of the take-up shaft is finely adjusted by adjusting the screws to ensure that the film end faces are aligned; After rewinding is completed, stop the machine and remove the rewound film roll.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, descriptions involving terms such as "primary," "secondary," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "primary" or "secondary" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

Claims

1. A device for slitting and rewinding copper foil roll base material, comprising a support base (1), characterized in that, The support base (1) is provided with an unwinding station and a winding station arranged side by side on its upper side. The unwinding station includes a pair of unwinding air shafts (5) arranged on the support base (1) and an unwinding motor (4) arranged on one side of the axial direction of the unwinding air shafts (5). The winding station includes a quick-stop device (7) arranged on the support base (1) and a winding motor (8) arranged on one side of the quick-stop device (7). The unwinding air shafts (5) are detachably mounted with an unwinding shaft (3), and the quick-stop devices (7) are detachably mounted with a winding shaft (6).

2. The device for slitting and rewinding copper foil roll base material according to claim 1, characterized in that: The bracket (1) also includes an auxiliary support (2) extending outward from the side. The unwinding motor (4) and the winding motor (8) are mounted on the corresponding auxiliary support (2) via a motor mounting bracket (10).

3. The device for slitting and rewinding copper foil roll base material according to claim 1, characterized in that: The unwinding motor (4) and the winding motor (8) are both equipped with couplings on their main shafts.

4. The device for slitting and rewinding copper foil roll base material according to claim 1, characterized in that: The quick-stop device (7) includes a stop seat (71) mounted on a bracket (1) and a stop rocker arm (72) hinged to the stop seat (71). The stop rocker arm (72) is L-shaped, with one end hinged to the upper end of the stop seat (71) and the other end of the stop rocker arm (72) is provided with a clamping screw (73).

5. The device for slitting and rewinding copper foil roll base material according to claim 4, characterized in that: The quick-stop device (7) further includes a fixing block (74) installed on the upper side of the limiting seat (71). An adjusting screw (75) is provided horizontally through the fixing block (74). One end of the adjusting screw (75) passes through the side wall of the limiting seat (71) and corresponds to the clamping screw (73).

6. The device for slitting and rewinding copper foil roll base material according to claim 4, characterized in that: The bracket (1) has a groove on the upper side where the quick limiting device (7) is installed, and the quick limiting device (7) is embedded in the groove.

7. The device for slitting and rewinding copper foil roll base material according to any one of claims 1-6, characterized in that: The bracket (1) is equipped with a meter counter mounting bracket (9) on one side of the winding station.

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