Film winding device and film winding system

Abstract

The utility model relates to the technical field of thin film winding equipment, and provides a thin film winding device and a thin film winding system.The thin film winding device sequentially comprises a guide roller, a tension roller, a contact roller set and a double-station winding roller in the winding direction of a thin film; the mode of transferring the film through double rollers is adopted, winding rollers do not need to move, automatic switching of winding stations can be achieved, automatic winding in the film production process is achieved, and the structure of the winding device is simplified; the function of automatically switching winding stations is achieved, and continuous and automatic winding of the thin film without shutdown or speed reduction can be achieved; compared with the prior art, no rotary table or conversion tower structure exists, the winding device is simplified, and the equipment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of film winding equipment, and in particular to a film winding device and a film winding system. Background Technology

[0002] Film winding is a crucial step in film production. Film winding is primarily achieved using winding rollers, supplemented by contact rollers to provide winding pressure, tension rollers to detect film tension, and other auxiliary rollers. The winding rollers rotate to wind the film onto the rollers, forming a film roll. As the length of the wound film increases, the diameter of the film roll gradually increases. Once a set diameter is reached, the film needs to be wound onto another winding roller; this process is called winding station switching.

[0003] The winding station switching process can be achieved manually, requiring the equipment to be paused or kept at a very low safe speed. The film is then manually cut and pulled onto another winding roller for winding. This method requires slowing down or stopping the machine, resulting in long switching times and impacting production efficiency. Furthermore, it requires personnel to enter the equipment, posing safety hazards.

[0004] The switching process for the rewinding station can also be achieved through automated equipment structures.

[0005] For example, CN114901573A discloses a winding device, a film roll manufacturing system, and a film roll manufacturing method. The film winding device involved is a turntable-type winding device. The turntable can support two roll cores for winding and can automatically rotate to exchange the positions of the two roll cores. The device is also equipped with guide rollers, splicing devices, approach rollers, contact rollers, etc., and can automatically switch roll cores after one roll core is fully wound, realizing automatic switching of the winding station.

[0006] CN113753641A discloses a film winding system and composite components. The film winding system includes a contact roller, a measuring roller, and a winding workstation. The contact and measuring rollers can move relative to each other to adjust the degree of film winding over the contact roller. The station switching is completed through the winding workstation, which is also a turntable type winding device.

[0007] CN202944918U discloses a film winding and cutting device, which is also a turntable winding device. It is equipped with a cutting transition roller so that the film is cut at a speed block and the cut is neat.

[0008] It is evident that rotary table winding devices are the primary method for achieving automatic switching of winding stations. Their main characteristic is the interchange of winding core positions via a rotary table or transfer tower. The rotation direction of the switching station on the rotary table or transfer tower is fixed, thus requiring the configuration of electric slip ring devices; some also require rotary joints for water and oil. To ensure winding stability, the rotary tables or transfer towers located on both sides require high precision. The rotary tables or transfer towers have complex structures and are heavy, often requiring high-power transfer motors. Furthermore, the rotation of both rotary tables or transfer towers must remain consistent during the switching process, placing high demands on rotational precision, motors, and control systems.

[0009] Based on the above, existing technologies, whether manually operated or rotary table-type automated winding devices, all suffer from low film winding efficiency, poor safety, or require high precision in coordination with related devices, which are technical problems that urgently need to be solved. Utility Model Content

[0010] To solve the above-mentioned technical problems, this utility model provides a film winding device, which, according to the winding direction of the film, includes a guide roller, a tension roller, a contact roller group and a dual-station winding roller in sequence.

[0011] The guide roller is installed at the starting position of the film winding device and rotates in a fixed manner to guide the film to move smoothly along a predetermined path.

[0012] The tension roller and the contact roller group move simultaneously and / or relative to each other to control the transport direction and tension of the film;

[0013] The contact roller group moves along a line parallel to or perpendicular to the line connecting the central axes of the two take-up rollers in the dual-station take-up roller, or the contact roller group moves at an angle to the line connecting the central axes of the two take-up rollers in the dual-station take-up roller, thereby transferring the film in the dual-station take-up roller.

[0014] The dual-station take-up roller is installed at the end of the film take-up device and includes two fixed rotating take-up rollers. The two take-up rollers cooperate with the other rollers to achieve film take-up by transferring the film.

[0015] The guide roller, tension roller, contact roller group and dual-station take-up roller are connected by a frame and guide rails set on the frame to complete the alignment, transfer and take-up of the film during the take-up process.

[0016] Furthermore, the contact roller assembly includes two contact rollers that move simultaneously and in opposite directions.

[0017] Furthermore, the distance between the opposite edges of the two contact rollers is greater than or equal to the thickness of the film, to ensure that the film can pass through the contact roller assembly between the two contact rollers.

[0018] Further, during the film winding process of the contact roller group, one of the contact rollers presses the film onto the film roll being wound on the double-station winding roller, and can gradually move backward away from the double-station winding roller as the diameter of the film roll increases, and provide different pressures according to the film winding requirements to provide a stable fitting effect.

[0019] Further, the connection line of the central axes of the two contact rollers in the contact roller group is parallel to the connection line of the central axes of the two winding rollers in the double-station winding roller.

[0020] Further, the angle of the included angle is greater than 0° and less than 90°.

[0021] Further, the connection line of the central axes of the two winding rollers in the double-station winding roller is horizontal or vertical to the ground.

[0022] Further, the rotation directions of the two winding rollers are opposite.

[0023] Further, the film winding device further includes a cutting device cooperating with the double-station winding roller. When one of the winding rollers in the double-station winding roller finishes winding and transfers the film to the other winding roller, the film located between the two winding rollers is cut.

[0024] Further, the cutting device includes but is not limited to a cutting knife.

[0025] Further, the cutting device moves parallel to the connection line of the central axes of the two winding rollers in the double-station winding roller or moves perpendicular to the connection line direction, so as to cut at a suitable cutting position and ensure that there is space for loading and unloading the winding roller core or film roll after cutting.

[0026] Further, the tension roller rotates while moving in a direction parallel or perpendicular to the ground.

[0027] Further, a tension sensor配套 with the tension roller is provided to detect the tension on the film in real time, ensure that the winding tension acting on the film is reasonable, and further ensure the stability during the winding process and the quality of the film.

[0028] Further, the film and the tension roller are arranged with a wrap angle.

[0029] Further, the wrap angle is set as a constant value.

[0030] Further, the constant value is 80 - 100°.

[0031] Further, the guide roller rotates fixedly to ensure that the wrap angle of the film on the tension roller is set as a constant value during the film winding process.

[0032] Furthermore, the linear velocity of each roller in the guide roller, tension roller, contact roller group and dual-station take-up roller remains constant during the film winding process to avoid sudden tension changes.

[0033] This utility model also provides a film winding system, which includes the above-mentioned film winding device, static electricity generating device, and static electricity eliminating device.

[0034] Furthermore, the electrostatic generator is located upstream of the contact roller group and on the upper and lower sides of the film, providing electrostatic charge to collect the starting winding when the film winding begins or when the work station is switched.

[0035] Furthermore, the electrostatic elimination device is located upstream of the guide roller and on both the upper and lower sides of the film to reduce electrostatic charge during the film winding process.

[0036] Furthermore, during the film winding process, the static electricity generator does not work, but the static electricity eliminator does; during the station switching process, the static electricity generator works, but the static electricity eliminator does not work.

[0037] Furthermore, the tension roller in the film winding device is connected to the control system, which is used to detect the tensile force of the film during the film winding process and feed it back to the control system, thereby reducing the processing difficulty of film winding.

[0038] The beneficial effects of this utility model are as follows:

[0039] 1. This utility model provides a film winding device, which, according to the film winding direction, sequentially includes a guide roller, a tension roller, a contact roller group, and a dual-station winding roller; the guide roller is installed at the starting position of the film winding device and is fixed and rotates; the tension roller and the contact roller group move simultaneously and / or move relative to each other; the contact roller group moves along a direction parallel to or perpendicular to the line connecting the central axes of the two winding rollers in the dual-station winding roller, or the contact roller group moves along a direction forming an angle with the line connecting the central axes of the two winding rollers in the dual-station winding roller. The dual-station take-up roller is installed at the end of the film winding device and includes two fixed rotating take-up rollers. The guide roller, tension roller, contact roller group, and dual-station take-up roller are connected via a frame and guide rails mounted on the frame. This invention uses a dual-roller film transfer method, eliminating the need for take-up roller movement, enabling automatic switching of the take-up station, achieving automatic take-up in the film production process, simplifying the structure of the take-up device, reducing equipment costs, enabling continuous film winding without stopping the machine, and significantly improving film winding efficiency.

[0040] 2. The film winding device provided by this utility model has the function of automatically switching winding stations, which can realize continuous automatic winding of film without stopping the machine or slowing down; it adopts the film transfer method, which simplifies the winding device and reduces equipment costs compared with the existing technology, eliminating the need for a turntable or conversion tower structure; it can adjust the precision of the winding rollers through the assembly process, reducing the processing difficulty and the complexity of the control system. Attached Figure Description

[0041] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and advantages of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0042] Figure 1 This is a schematic diagram of the structure of the film winding device of this utility model, in which the line connecting the central axes of the first winding roller and the second winding roller is perpendicular to the ground.

[0043] Figure 2 This is a schematic diagram of the initial winding of the film according to this utility model;

[0044] Figure 3 This is a schematic diagram of the first winding roller of this utility model.

[0045] Figure 4 This is a schematic diagram of the first winding roller of this utility model fully wound;

[0046] Figure 5 This is a schematic diagram showing the transfer of the film of this utility model from the first take-up roller to the second take-up roller;

[0047] Figure 6 This is a schematic diagram of the second winding roller of this utility model.

[0048] Figure 7 This is a schematic diagram of the second winding roller of this utility model fully wound;

[0049] Figure 8 This is a schematic diagram showing the transfer of the film of this utility model from the second take-up roller to the first take-up roller;

[0050] Figure 9 This is a schematic diagram showing the structure of the film winding device of this utility model, in which the line connecting the central axes of the first winding roller and the second winding roller is horizontal with respect to the ground.

[0051] The names of the labels in the diagram are:

[0052] 1. Guide roller; 2. Tension roller; 3. Contact roller group; 301. First contact roller; 302. Second contact roller; 4. Dual-station take-up roller; 401. First take-up roller; 402. Second take-up roller; 5. Cutting device; A. Film; B. Film roll; C. Wrap corner. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0054] It should be noted that the term "comprising" in the specification, claims, and accompanying drawings of this utility model is intended to cover a non-exclusive inclusion. In this utility model, the terms "upper," "lower," "first," "second," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe this utility model and its embodiments and are not intended to limit the indicated components to having a specific orientation. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0055] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] Example 1

[0057] like Figure 1 As shown, this embodiment provides a film winding device, which, according to the winding direction of film A, sequentially includes a guide roller 1, a tension roller 2, a contact roller group 3, and a dual-station winding roller 4;

[0058] The guide roller 1 is installed at the starting position of the film winding device and rotates in a fixed manner to guide the film A to move smoothly along a predetermined path;

[0059] The tension roller 2 and the contact roller 3 move simultaneously and / or relative to each other to control the transport direction and tension of the film A;

[0060] The contact roller group 3 moves along a line parallel to or perpendicular to the line connecting the central axes of the two take-up rollers in the dual-station take-up roller 4, or the contact roller group 3 moves at an angle to the line connecting the central axes of the two take-up rollers in the dual-station take-up roller 4.

[0061] The dual-station take-up roller 4 is installed at the end of the film winding device and includes two fixed rotating take-up rollers. The two take-up rollers cooperate with the other rollers to achieve film winding by transferring the film, realizing continuous film winding without stopping the machine and greatly improving film winding efficiency. Furthermore, fixing the two take-up rollers ensures that film A remains clean during the winding process, avoiding the uneven winding caused by non-fixed winding in the prior art, such as turntable winding devices, which leads to film A cracking and delamination. This ensures the cleanliness and firmness of film A. It also makes the take-up rollers easy to maintain and repair, reducing production costs.

[0062] The guide roller 1, tension roller 2, contact roller group 3 and dual-station take-up roller 4 are connected by a frame and guide rails on the frame to complete the alignment, transfer and take-up of the film A during the take-up process.

[0063] exist Figure 1 In the diagram, the arrows indicate the direction of movement or rotation of each device. In some embodiments, to optimize thin film production, the direction of movement or rotation of each device may be adaptively adjusted according to actual needs. For example, the direction of movement may include, but is not limited to, horizontal or vertical, or it may move in a direction with a certain angle.

[0064] The contact roller group 3 includes two contact rollers that move simultaneously and turn in opposite directions, namely the first contact roller 301 and the second contact roller 302.

[0065] In this embodiment, the relative edge distance between the two contact rollers, namely the first contact roller 301 and the second contact roller 302, is equal to the thickness of the film A, so as to ensure that the film A can pass through the contact roller group 3 between the two contact rollers, namely the first contact roller 301 and the second contact roller 302. The edge distance can be adjusted with the change of the thickness of the film A to adapt to different winding processes.

[0066] During the film winding process, the contact roller group 3 presses the film A onto the film roll B that is being wound by the dual-station winding roller 4. As the diameter of the film roll B increases, it can gradually move away from the dual-station winding roller 4 and provide different pressures according to the winding requirements to stabilize the bonding effect.

[0067] The line connecting the central axes of the two contact rollers in the contact roller group 3, namely the first contact roller 301 and the second contact roller 302, is parallel to the line connecting the central axes of the two take-up rollers in the dual-station take-up roller, namely the first take-up roller 401 and the second take-up roller 402.

[0068] In this embodiment, as Figure 1-8As shown, the line connecting the central axes of the two take-up rollers in the dual-station take-up roller 4, namely the first take-up roller 401 and the second take-up roller 402, is perpendicular to the ground. In some embodiments, such as... Figure 9 As shown, the line connecting the central axes of the first take-up roller 401 and the second take-up roller 402 is horizontal with respect to the ground.

[0069] Furthermore, the two take-up rollers, namely the first take-up roller 401 and the second take-up roller 402, rotate in opposite directions.

[0070] In this embodiment, the film winding device also includes a cutting device 5 that works in conjunction with the dual-station winding roller 4. When one of the winding rollers, such as the first winding roller 401, finishes winding, the film A is transferred to the other winding roller, namely the second winding roller 402, and the film A located between the two winding rollers is cut.

[0071] The cutting device 5 moves parallel to or perpendicular to the line connecting the central axes of the two take-up rollers in the dual-station take-up roller 4, namely the first take-up roller 401 and the second take-up roller 402, so as to cut at a suitable cutting position and ensure that space is made for loading and unloading the take-up roller core or film roll B after cutting.

[0072] The tension roller 2 rotates while moving in a direction parallel or perpendicular to the ground.

[0073] In this embodiment, a tension sensor matched with the tension roller 2 is also provided to detect the tension on the film A in real time, so as to ensure that the winding tension acting on the film A is reasonable, thereby ensuring the stability of the winding process and the quality of the film A.

[0074] like Figure 2 The film A and the tension roller 2 are configured with a wrap angle, and the wrap angle C of film A to tension roller 2 is a constant value of 90°. In some embodiments, the wrap angle can be any value between 80° and 100° depending on the requirements of different film winding, but it needs to remain the same constant value during one winding process. This is also for the convenience of tension calculation, avoiding deviations in tension setting due to complex calculations or errors, which could lead to problems such as unqualified winding quality during film winding.

[0075] The guide roller 1 rotates in a fixed manner. In this embodiment, the line connecting the tangent points of the opposite edges of the guide roller 1 and the tension roller 2 is perpendicular to the ground. That is, the film A located between the guide roller 1 and the tension roller 2 is perpendicular to the ground. Therefore, it can be ensured that the wrap angle of the film A to the tension roller 2 is set to a constant value of 90° during the film winding process.

[0076] In this embodiment, the contact roller group 3 and the tension roller 2 are made of carbon fiber. In other embodiments, they can be made of any other material capable of forming their structure.

[0077] In this embodiment, the linear speed of each roller in the guide roller 1, tension roller 2, contact roller group 3, and dual-station take-up roller 4 is set to be fixed. This ensures that the tension on the film A during conveying and transfer at the dual stations will not change suddenly. If the linear speed changes or deviates during the winding process, the film A may face a sharp increase or decrease in tension at the moment of transfer. This can easily lead to problems such as overstretching, wrinkling, or even damage to the film A. Maintaining a fixed linear speed effectively avoids these situations, ensuring the flatness and integrity of the film A after winding. This results in a higher quality final product that better meets the requirements of subsequent processing or use.

[0078] This embodiment also provides a film winding system, which includes the above-mentioned film winding device, static electricity generator, and static electricity elimination device.

[0079] The electrostatic generator is located upstream of the contact roller group 3 and on both the upper and lower sides of the film A. It provides electrostatic charge to collect the starting winding when the film winding begins or when the work station is switched.

[0080] When the first take-up roller 401 starts winding, the electrostatic generator on the upper side of film A emits electrostatic charge to the upper surface of film A. When film A is cut, the electrostatic charge attracts film A to the first take-up roller 401, which can realize the automatic start of winding of the first take-up roller 401.

[0081] When the second take-up roller 402 begins winding, the electrostatic generator on the lower side of film A emits electrostatic charge onto the lower surface of film A. When film A is cut, the electrostatic charge attracts the film onto the second take-up roller 402, thus enabling the second take-up roller 402 to automatically begin winding. After the winding begins, the electrostatic generator stops working.

[0082] The static elimination device is located upstream of the guide roller 1 and on both sides of the film A to reduce the static charge during the film winding process.

[0083] During the winding process of film A, the static electricity generator does not work, but the static electricity eliminator works; during the station switching process, the static electricity generator works, but the static electricity eliminator does not work.

[0084] In some embodiments, the tension roller 2 in the film winding device can also be connected to a control system, which is used to detect the tensile force of film A during the film winding process and feed it back to the control system, thereby reducing the processing difficulty of film winding.

[0085] In this embodiment, the frame of the film winding device includes a first frame, a second frame, and a third frame, and is equipped with horizontal and / or vertical guide rails, as well as motors for driving each device in the film winding device. In some embodiments, to further enhance efficiency, guide rails with tilt angles may also be installed.

[0086] Specifically, the dual-station take-up roller 4 is composed of two fixed take-up rollers. The line connecting the centers of the two take-up rollers can be in any direction, preferably vertical or horizontal. In this embodiment, for example... Figure 1 As shown, the line connecting the central axes of the first take-up roller 401 and the second take-up roller 402 is perpendicular to the ground. Each take-up roller is individually fixed to the first frame, and each take-up roller is driven by a separate motor. The center lines of the two take-up rollers are parallel to each other.

[0087] The contact roller group 3 consists of two contact rollers and a tension roller 2. The centerlines of the first contact roller 301 and the second contact roller 302 in the contact roller group 3 are parallel to each other and parallel to the centerline of the dual-station take-up roller 4. A gap is left between the first contact roller 301 and the second contact roller 302 to allow the film A to pass through; that is, in this embodiment, the thickness of the gap is equal to the thickness of the film A. The first contact roller 301 and the second contact roller 302 move simultaneously but in opposite directions. The rotation of the first contact roller 301 and the second contact roller 302 can be driven synchronously by a single motor and gear set, or it can be driven independently by two motors. In this embodiment, it is driven independently by two motors. The advantage of independent drive is that when the first contact roller 301 is working, the second contact roller 302 does not need to rotate. After the first take-up roller 401 corresponding to the first contact roller 301 has finished winding, the motor controlling the second contact roller 302 can be turned on. However, the set linear speed needs to be reached before the contact roller group 3 reaches the next station. Similarly, when the second contact roller 302 is working, the first contact roller 301 does not need to rotate. After the second take-up roller 402 corresponding to the second contact roller 302 has finished winding, the motor controlling the first contact roller 301 can be turned on. Again, the set linear speed needs to be reached before the contact roller group 3 reaches the next station. This independent drive of the two motors can achieve energy saving without reducing the film winding efficiency in the whole set of equipment. It also extends the service life of each contact roller and avoids contact roller fatigue and wear caused by continuous rotation.

[0088] A vertical guide rail is mounted on the first frame, and a second frame is mounted on the vertical guide rail. In this embodiment, the second frame is driven to move vertically by a motor via a ball screw structure, or in some embodiments by a gear and rack mechanism. Tension roller 2 is mounted on the second frame and is driven to rotate by a motor. A horizontal guide rail is provided on the second frame, and a third frame is mounted on the horizontal guide rail. In this embodiment, a linear motor is used, or in some embodiments, a motor plus a ball screw or a motor plus a gear and rack mechanism is used to drive horizontal movement. The contact roller group 3 and its driving device are mounted on the third frame. Each roller must be parallel to the dual-station take-up roller 4 after movement. A servo motor is preferred as the drive motor for each roller's movement. Therefore, the accuracy of the take-up roller can be adjusted during assembly, reducing processing difficulty and the complexity of the control system.

[0089] A guide roller 1 is installed on the first frame and is driven to rotate by an independent motor.

[0090] like Figure 2-8 As shown, the specific process of the film winding device in this embodiment is as follows:

[0091] For the first winding, film A needs to be manually pulled onto one of the winding rollers in the dual-station winding rollers 4, such as the first winding roller 401. At this time, the contact roller group 3 is positioned horizontally away from the dual-station winding rollers 4, as shown below. Figure 2 As shown, the upper surface of the second contact roller 302, positioned vertically in the middle, is flush with the upper surface of the first take-up roller 401, facilitating manual pulling of the film A onto the first take-up roller 401. The first take-up roller 401 then begins winding, as... Figure 3 As shown, the guide roller 1, tension roller 2, second contact roller 302, and first contact roller 301 that are in contact with film A rotate at a set fixed linear speed, and the tension roller 2 and contact roller group 3 quickly move to the first winding station corresponding to the first winding roller 401.

[0092] During the first take-up roller 401 winding, the tension roller 2 and the contact roller group 3 are in the first take-up position, where the first contact roller 301 presses the film A onto the first take-up roller 401. As winding progresses, the diameter of the film roll B gradually increases, and the contact roller group 3 moves backward along with the roll diameter, gradually moving away from the dual-position take-up roller 4 as the diameter of film roll B increases, and can provide a certain clamping force according to the requirements of the winding process. During the winding process, all rollers in contact with the film A rotate at a set fixed linear speed, while the second contact roller 302, which is not in contact with the film A, does not rotate. That is, the two contact rollers are driven by two motors, achieving the purpose of energy saving and loss reduction.

[0093] like Figure 4-5As shown, after the first take-up roller 401 is fully wound, the tension roller 2 and the contact roller group 3 quickly transfer to the second take-up station corresponding to the second take-up roller 402. Before the transfer, the second contact roller 302 and the second take-up roller 402 begin to rotate and maintain a set fixed linear speed. In some embodiments, while the tension roller 2 is moving linearly, the contact roller group 3 can also move obliquely. Figure 4 The film A moves diagonally upwards from its position in the diagram towards the second take-up roller 402. This requires the use of a guide rail with an inclined angle to achieve rapid transfer and minimize time delays caused by station changes, thereby improving the overall production efficiency of the film A winding process and allowing more winding tasks to be completed per unit time. After the tension roller 2 and contact roller group 3 reach the second take-up station, film A is brought to the second take-up roller 402 and pressed onto it by the second contact roller 302. At this time, all rollers rotate at a preset fixed linear speed.

[0094] Subsequently, the electrostatic generator on the lower side of film A emits electrostatic charge onto the lower side of film A. Simultaneously, the cutting device (in this embodiment, a cutter) quickly moves to the cutting position and rapidly cuts film A. The tail of film A continues to be wound onto the first take-up roller 401, while the head of film A is electrostatically attracted to the second take-up roller 402 for winding. Afterward, the first take-up roller 401 and the first contact roller 301 stop rotating, and the electrostatic generator stops generating static electricity. This completes the automatic switch from the first take-up station to the second take-up station.

[0095] like Figure 6 As shown, during the winding process, the tension roller 2 and the contact roller group 3 are in the second winding position when the second winding roller 402 is winding. The second contact roller 302 presses the film A onto the second winding roller 402. As winding progresses, the diameter of the film roll B gradually increases, and the second contact roller 302 gradually retracts along with the roll diameter, moving further away from the dual-position winding roller 4 as the diameter of film roll B increases. It can also provide a certain clamping force according to the requirements of the winding process. During the winding process, all rollers in contact with the film A rotate at a set fixed linear speed. The first contact roller 301, which is not in contact with the film A, does not rotate. That is, the two contact rollers are driven by two motors, achieving energy saving and loss reduction.

[0096] like Figure 7-8 As shown, after the second take-up roller 402 is fully wound, the tension roller 2 and the contact roller group 3 are quickly transferred to the first take-up station. Before the transfer, the first contact roller 301 and the first take-up roller 401 begin to rotate and maintain a set fixed linear speed. In some embodiments, while the tension roller 2 is moving linearly, the contact roller group 3 can also move obliquely. Figure 7The film A moves diagonally downwards from its position in the diagram towards the first take-up roller 401. This requires the use of a guide rail with an inclined angle to achieve rapid transfer and minimize time delays caused by station changes, thereby improving the overall production efficiency of the film A winding process and allowing more winding tasks to be completed per unit time. After the tension roller 2 and contact roller group 3 reach the first winding station, film A is brought to the first take-up roller 401 and pressed onto it by the first contact roller 301. At this time, all rollers rotate at a preset fixed linear speed.

[0097] Because this utility model specifies a clear operating requirement that each roller must maintain a fixed linear speed, operators can quickly adjust the device according to the standard settings during daily operation and when switching between different batches of production. This eliminates the need to spend a lot of time figuring out the appropriate speed ratio between each roller, making the equipment startup preparation and the adjustment process during the transition between different winding stages simpler and faster, further contributing to the improvement of overall production efficiency.

[0098] Meanwhile, each roller maintains a fixed linear speed, avoiding uneven pulling and friction caused by speed differences during production. For example, if the linear speed is not fixed, excessive local friction may occur at the contact points between some rollers. Prolonged operation under such conditions will accelerate the wear of components. The stable fixed linear speed operation mode ensures relatively uniform force on each component, which helps extend the service life of key components such as guide roller 1, tension roller 2, contact roller group 3, and dual-station take-up roller 4, reduces the frequency of equipment maintenance and component replacement, and lowers equipment maintenance costs.

[0099] Therefore, precise control of the linear speed of each roller and reasonable station transfer during the entire winding process enable the film winding device to operate in a relatively stable state, reducing abnormal equipment vibration and jamming caused by unreasonable processes. This not only ensures the continuity of production but also helps to improve the overall operational stability and reliability of the device, reduce downtime caused by device failures, and improve the effective utilization rate of the device.

[0100] In summary, this utility model employs a dual-roller film transfer method, eliminating the need for moving the take-up roller. It enables automatic switching of the take-up station, achieving automated take-up during film production, simplifying the structure of the take-up device, and reducing equipment costs. Furthermore, the fixed dual-station take-up roller method is relatively simple; the operator only needs to fix one end of film A onto one of the take-up rollers and start the motor to begin take-up. Compared to existing technologies, it eliminates the need for a turntable or transfer tower structure, simplifying the take-up device and reducing equipment costs. The accuracy of the take-up rollers can be adjusted during assembly, reducing processing difficulty and control system complexity, enabling continuous film take-up without stopping the machine, and significantly improving film take-up efficiency.

[0101] It should be understood that this utility model is not limited to the content already described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A film winding device, characterized in that, According to the winding direction of the film, it includes, in sequence, a guide roller (1), a tension roller (2), a contact roller group (3), and a dual-station winding roller (4). The guide roller (1) is installed at the starting position of the film winding device and is fixed and rotated. The tension roller (2) and the contact roller group (3) move simultaneously and / or relative to each other; The contact roller group (3) moves along the line connecting the two take-up rollers in the dual-station take-up roller (4) parallel or perpendicular to the line connecting the two take-up rollers in the dual-station take-up roller (4), or the contact roller group (3) moves along the line connecting the two take-up rollers in the dual-station take-up roller (4) at an angle. The dual-station take-up roller (4) is installed at the end of the film take-up device and includes two fixed rotating take-up rollers; The guide roller (1), tension roller (2), contact roller group (3) and dual-station take-up roller (4) are connected by a frame and guide rails set on the frame.

2. The film winding device according to claim 1, characterized in that, The contact roller group (3) includes two contact rollers that move simultaneously and turn in opposite directions.

3. The film winding device according to claim 2, characterized in that, The line connecting the two central axes of the contact rollers in the contact roller group (3) is parallel to the line connecting the two central axes of the take-up rollers in the dual-station take-up roller.

4. The film winding device according to claim 1, characterized in that, The line connecting the central axes of the two take-up rollers in the dual-station take-up roller (4) is horizontal or vertical to the ground.

5. The film winding device according to claim 4, characterized in that, The two take-up rollers rotate in opposite directions.

6. The film winding device according to claim 1, characterized in that, The film winding device also includes a cutting device (5) that works in conjunction with the dual-station winding roller (4).

7. The film winding device according to claim 1, characterized in that, The film and the tension roller (2) are set at an angle.

8. A film winding system, characterized in that, The system includes the film winding device, the static electricity generating device, and the static electricity eliminating device as described in any one of claims 1-7.

9. The film winding system according to claim 8, characterized in that, The electrostatic generator is located upstream of the contact roller group (3) and on the upper and lower sides of the film.

10. The film winding system according to claim 8, characterized in that, The static elimination device is located upstream of the guide roller (1) and on both the upper and lower sides of the film.

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