A film winding device and a control method

Abstract

The present invention discloses a film winding device and a control method, which belongs to the field of vacuum coating equipment, and comprises: a winding component, which winds up the film to form a film roll; the winding component is installed on a moving component and moves back and forth along the setting direction of the moving component; a film pressing component is arranged on one side of the winding component, and the film pressing component is in contact with the film roll; when the winding component is in operation, the moving component drives the winding component to move in a direction away from the film pressing component, and the film pressing component swings; by setting the film pressing component in contact with the film roll, during the winding process, the diameter of the film roll becomes larger, and the moving component drives the winding component to move, so that the winding size of the film roll is adapted, and at the same time, the film pressing roller is pushed to swing outward for pressure compensation, so that the film pressing roller always presses the film roll, which helps to maintain the constant surface tension of the film and can reduce the problems of white wrinkles and deformation of the film during the winding process.

Description

Technical Field

[0001] The present invention relates to the field of vacuum coating equipment, and in particular to a film winding device and a control method. Background Art

[0002] When the film of the existing vacuum coating equipment is rolled up, the tensioning shaft rotates to roll the plated film onto the tensioned reel, and a swivel arm assembly is set. Through the photoelectric sensor on the swivel arm assembly, a certain amount of gap is maintained between the film roll and the idle roller of the swivel arm. As the diameter of the film roll increases, the idle roller of the swivel arm and the film roll always maintain a certain gap. Because a certain amount of gap is maintained between the idle roller of the swivel arm and the film roll when the swivel arm is rolled up, and the swivel arm assembly moves at the same time, the tightness of the film rolling is affected.

[0003] The electric push rod pushes the swing arm assembly backward, causing the wrap angle of the winding roller to change. At the same time, since the processing thickness of the film fluctuates within the tolerance range, the winding tension will also change. This unstable change will cause wrinkles in the film roll after winding. The thickness of the existing OPP film or PET film is in the micron level, PET film is generally 12-350μm, and OPP film is generally between 10-50μm. However, after winding, the outer diameter of the film roll is generally 100-600mm, and the number of turns required for rotation and winding is extremely large. The wrinkles caused by tension changes are difficult to detect during winding. Often, after many turns of winding, the wrinkles are stacked on each other and will not be detected. However, at this time, the problem has already formed and is difficult to repair. The tightness and wrinkles of the film winding directly affect the subsequent processing and use of the film material, resulting in material waste and reduced production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a film winding device and a control method.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a film winding device, comprising:

[0006] A winding component is used to wind up the film to form a film roll;

[0007] The winding assembly is installed on the moving assembly and reciprocates along the setting direction of the moving assembly;

[0008] A film pressing assembly is provided on one side of the winding assembly, and the film pressing assembly is in contact with the film roll;

[0009] When the winding assembly is in operation, the moving assembly drives the winding assembly to move in a direction away from the film pressing assembly, and the film pressing assembly swings.

[0010] As a further description of the above technical solution: the winding assembly includes two winding seats arranged in parallel, and a bearing seat is integrally installed on the winding seat.

[0011] As a further description of the above technical solution: the bearing seat is equipped with a tensioning shaft through a bearing, and any axial end of the tensioning shaft is connected to a first driving mechanism, and the first driving mechanism is connected to the winding seat.

[0012] As a further description of the above technical solution: two clamping wheels are provided on the tensioning shaft, and a positioning member is provided on the side of the clamping wheel close to the bearing seat, and the positioning member limits the axial movement of the clamping wheel along the tensioning shaft.

[0013] As a further description of the above technical solution: the moving component includes a slide rail, a slider is provided on the slide rail, and the slider is connected to the winding seat.

[0014] As a further description of the above technical solution: the moving component also includes a second driving mechanism, a reducer is provided at the output end of the second driving mechanism, a coupling is provided on one side of the reducer, the coupling is connected to the screw rod, the other side of the screw rod is connected to the winding seat through a support, a screw rod nut seat is provided on the screw rod, the axial direction of the screw rod is perpendicular to the axial direction of the tensioning shaft, and is parallel to the setting direction of the slide rail.

[0015] As a further description of the above technical solution: the film pressing assembly includes a rotating plate, and a rotating shaft is arranged on the rotating plate, so that the rotating plate rotates along the axial direction of the rotating shaft.

[0016] As a further description of the above technical solution: a telescopic member is arranged on the rotating plate, a film pressing roller is installed on one side of the telescopic member, and the film pressing roller is located on one side of the tensioning shaft.

[0017] As a further description of the above technical solution: the winding assembly, the moving assembly and the film pressing assembly are arranged in a vacuum environment.

[0018] Also included is a winding control method, which is applicable to the winding device according to any one of the above technical solutions, including:

[0019] S1: After the winding component moves and resets, it loads the material, draws a vacuum, and receives the set winding operation parameters and pressure parameters;

[0020] S2: Control the winding assembly to rotate and wind at a uniform speed, and control the moving assembly to decelerate and move away from the film pressing assembly;

[0021] S3: Monitor the wrap angle of the winding assembly, control the rotation of the film pressing assembly, and perform pressure parameter compensation until the winding is completed.

[0022] The above technical solution has the following advantages or beneficial effects:

[0023] By providing a film pressing assembly that contacts the film roll, during the winding process, as the diameter of the film roll increases, the moving assembly drives the winding assembly to move, so that the winding size of the film roll is adapted. At the same time, it pushes the film pressing roller to swing outwards for pressure compensation, so that the film pressing roller always presses on the film roll, which helps to maintain the constancy of the surface tension of the film and can reduce the problems of white wrinkles and deformation of the film during the winding process. Description of the Drawings

[0024] Figure 1 Is a perspective view of the film winding device proposed by the present invention;

[0025] Figure 2 Is a side view of the film winding device proposed by the present invention;

[0026] Figure 3 Is a flowchart of the control method proposed by the present invention.

[0027] Legend Explanation:

[0028] 1. Winding assembly; 11. Winding base; 12. Bearing seat; 13. Tensioning shaft; 14. First driving mechanism; 15. Clamping wheel; 16. Positioning member; 2. Moving assembly; 21. Slide rail; 22. Slide block; 23. Second driving mechanism; 24. Reducer; 25. Coupling; 26. Lead screw; 27. Lead screw nut seat; 3. Film pressing assembly; 31. Rotating plate; 32. Rotating shaft; 33. Telescopic member; 34. Film pressing roller. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] The applicant found in the research that when the existing vacuum coating equipment winds the processed OPP film or PET film, a swing arm assembly is provided, and through the photoelectric sensor on the swing arm assembly, a certain amount of gap is maintained between the film roll and the swing arm idler roller. As the diameter of the film roll increases, the swing arm idler roller and the film roll for receiving the film always maintain a certain gap. Since there is a certain amount of gap between the swing arm idler roller and the film roll when the swing arm is winding, and the swing arm assembly moves simultaneously, it affects the tightness of the film winding.

[0031] The electric push rod pushes the swivel arm assembly backward, causing the wrap angle of the winding roller to change. At the same time, since the processing thickness of the film fluctuates within the tolerance range, the winding tension will also change. This unstable change will cause wrinkles in the film roll after winding.

[0032] Reference Figure 1-Figure 2 An embodiment of the present invention is as follows: a film winding device comprises: a winding component 1, which winds up the film to form a film roll; the winding component 1 is installed on the moving component 2, and reciprocates along the setting direction of the moving component 2; a film pressing component 3 is provided on one side of the winding component 1, and the film pressing component 3 is in contact with the film roll; when the winding component 1 is running, the moving component 2 drives the winding component 1 to move in a direction away from the film pressing component 3, and the film pressing component 3 swings.

[0033] In this embodiment, the winding component 1 is installed on the moving component 2. When winding, the moving component 2 is controlled to drive the winding component 1 to move, so that when the winding component 1 is winding, as the size of the film roll continues to increase, the size of the wrap angle between the film and the tensioning shaft 13 is adjusted to reduce the problem of loose film roll caused by the change of the wrap angle. By setting a film pressing component 3 in contact with the film roll, during the winding process, the diameter of the film roll becomes larger, and the moving component 2 drives the winding component 1 to move to adapt the winding size of the film roll, and at the same time pushes the film pressing roller 34 to swing outward for pressure compensation, so that the film pressing roller 34 always presses the film roll, which helps to maintain the constant surface tension of the film and can reduce the problem of white wrinkles and deformation of the film during the winding process.

[0034] The central angle of the part of the circle that the film bypasses from the point of contact with the winding drum outside the tensioning shaft 13 to the point of leaving the contact is the wrap angle. Assuming that the radius of the winding drum is R, the arc length of the contact between the film and the winding drum is L, and the wrap angle is α, according to the arc length formula L=αR, it can be obtained that α=L / R. The larger the diameter, the smaller the wrap angle will be. During the winding process, as the diameter of the film roll continues to increase, the wrap angle also changes continuously. By moving component 2, the position of the contact point when the film is wound is adjusted.

[0035] The winding assembly 1 comprises two winding seats 11 arranged in parallel, and a bearing seat 12 is integrally mounted on the winding seat 11 .

[0036] In this embodiment, the two winding seats 11 are arranged in parallel to facilitate connection with the moving component 2. The winding seat 11 is arranged on the side panel on the inner side of the vacuum equipment through the moving component 2. The moving component 2 drives the two winding seats 11 to move synchronously. Bearing seats 12 are installed on the two winding seats 11. Through holes are opened on the winding seat 11 and the bearing seat 12, and the through holes are coaxially arranged. A bearing is arranged at the through hole of the bearing seat 12 for connecting with the tensioning shaft 13.

[0037] The bearing seat 12 is provided with a tensioning shaft 13 via a bearing. Any axial end of the tensioning shaft 13 is connected to a first driving mechanism 14 , and the first driving mechanism 14 is connected to the winding seat 11 .

[0038] In this embodiment, both ends of the tensioning shaft 13 cooperate with the bearings at the through holes of the bearing seats 12 on both sides, and either end of the tensioning shaft 13 extends to the through hole at the winding seat 11. The first driving mechanism 14 is a motor, which is installed on one side of the winding seat 11. The output end is connected to the tensioning shaft 13, driving the tensioning shaft 13 to rotate and wind.

[0039] Two clamping wheels 15 are provided on the tensioning shaft 13 . A positioning member 16 is provided on one side of the clamping wheel 15 close to the bearing seat 12 . The positioning member 16 limits the axial movement of the clamping wheel 15 along the tensioning shaft 13 .

[0040] In this embodiment, two clamping wheels 15 are provided on the tensioning shaft 13. When winding, a winding drum is installed between the two clamping wheels 15. The winding drum is driven to rotate by the tensioning shaft 13 to allow the film to be wound on the winding drum. The clamping wheels 15 are attached to the two side end surfaces of the winding drum. A positioning member 16 is provided on the other side of the clamping wheel 15. The positioning member 16 is sleeved on the tensioning shaft 13. A mounting hole is opened on the positioning member 16. The position of the positioning member 16 on the tensioning shaft 13 is adjusted through the mounting hole.

[0041] The moving assembly 2 includes a slide rail 21 , on which a slider 22 is disposed. The slider 22 is connected to the winding seat 11 .

[0042] In this embodiment, the slide rail 21 is a linear slide rail, one side of which is fixed to the side plate of the vacuum device, and the other side is connected to the winding seat 11 through the slider 22, so that the winding seat 11 moves along the setting direction of the slide rail 21.

[0043] The moving assembly 2 also includes a second driving mechanism 23, and a reducer 24 is provided at the output end of the second driving mechanism 23. A coupling 25 is provided on one side of the reducer 24. The coupling 25 is connected to a screw rod 26. The other side of the screw rod 26 is connected to the winding seat 11 through a support. A screw rod nut seat 27 is provided on the screw rod 26. The axial direction of the screw rod 26 is perpendicular to the axial direction of the tensioning shaft 13 and parallel to the setting direction of the slide rail 21.

[0044] In this embodiment, the second driving mechanism 23 is a servo motor, and a reducer 24 and a coupling 25 are provided at the output end, which are used to connect with the screw rod 26 to adjust the rotation speed of the screw rod 26. The other side of the screw rod 26 is arranged on a support and connected to the support through a bearing. The support is arranged on the side of the winding seat 11 close to the slide rail 21. A screw nut seat 27 is also sleeved on the screw rod 26. The screw nut seat 27 is fixed on the side plate of the vacuum equipment. The second driving mechanism 23 is connected to the winding seat 11 for synchronous movement. The screw rod 26 is driven to rotate by the second driving mechanism 23. Since the screw nut seat 27 is limited, the screw rod 26 is displaced in the axial direction of the screw nut seat 27, driving the winding seat 11 to move, so that the winding seat 11 moves along the setting direction of the slide rail 21.

[0045] The film pressing assembly 3 includes a rotating plate 31 , on which a rotating shaft 32 is provided, so that the rotating plate 31 rotates along the axial direction of the rotating shaft 32 .

[0046] In this embodiment, the rotating shaft 32 is movably connected to the side plate of the vacuum equipment, and the rotating plate 31 can be driven to rotate by the rotating shaft 32. The rotating shaft 32 is arranged above the tensioning shaft 13, and the rotating plate 31 extends to one side of the tensioning shaft 13. Under the action of its own gravity, the film pressing roller 34 is in contact with the film roll.

[0047] A telescopic member 33 is disposed on the rotating plate 31 . A film pressing roller 34 is installed on one side of the telescopic member 33 . The film pressing roller 34 is located on one side of the tensioning shaft 13 .

[0048] In this embodiment, the telescopic member 33 is an electric telescopic rod or a cylinder. The telescopic member 33 is used to control the extension length of the film pressing roller 34 and adjust the contact position with the film roll. The pressure between the film pressing roller 34 and the film roll is: the component force of the gravity direction of the film pressing assembly 3 and the angle between the center of the film pressing roller 34 and the center of the tensioning shaft 13. Assuming that the gravity is G, the pressure is F, and the angle is θ, the pressure F=Gcosθ, the angle between the center of the film pressing roller 34 and the center of the tensioning shaft 13 and the gravity direction can be adjusted by the telescopic member. During the film winding process, the diameter of the film roll increases, pushing the film pressing roller 34 to move outward, and the telescopic member 33 becomes longer, so that the film pressing roller 34 always presses the film roll and maintains uniform pressure.

[0049] The winding assembly 1, the moving assembly 2 and the film pressing assembly 3 are arranged in a vacuum environment.

[0050] In this embodiment, the film winding device is used to wind up the film processed by the vacuum coating equipment, and is also arranged in a vacuum environment to prevent dust in the air from being wound into the film roll or to prevent gas from existing between the film rolls.

[0051] Reference Figure 3, and also includes an embodiment of a winding control method, the control method is applicable to the winding device of any one of the above technical solutions, including:

[0052] S1: After the winding component moves and resets, it loads the material, draws a vacuum, and receives the set winding operation parameters and pressure parameters;

[0053] S2: Control the winding assembly to rotate and wind at a uniform speed, and control the moving assembly to decelerate and move away from the film pressing assembly;

[0054] S3: Monitor the wrap angle of the winding component, control the rotation of the film pressing component, and perform pressure parameter compensation until the winding is completed.

[0055] In this embodiment, the winding assembly 1 is controlled to move and reset, the winding drum is installed on the tensioning shaft 13, and the tensioning shaft 13 is installed on the bearing seat 12. After the loading is completed, the vacuum equipment is vacuumed inside, and the relevant parameters of the first drive mechanism 14, the second drive mechanism 23 and the telescopic member 33 are set on the control panel to control the rotation speed, movement speed and pressure parameters of the winding.

[0056] After the setting is completed, power is turned on to control the operation of the first drive mechanism 14 and the second drive mechanism 23. The first drive mechanism 14 drives the tensioning shaft 13 to rotate at a uniform speed for winding, and the second drive mechanism 23 controls the moving component 2 to decelerate. When the winding drum starts to wind, the diameter is small and the outer diameter of the film roll increases rapidly, so the moving speed of the moving component 2 is fast. Due to the uniform speed of winding, the rate of increase of the outer diameter gradually decreases, and the speed of the moving component 2 also gradually decreases. The speed of the moving component 2 is related to the rate of change of the outer diameter of the film roll. The specific parameters are set according to the size of the film to be wound and the winding length.

[0057] When winding, the present embodiment can also use a photoelectric sensor for monitoring, determine the change of the wrap angle during the winding process, and control the telescopic member 33 to make adjustments so that the film pressing roller 34 is always in contact with the film roll. When the winding pressure is different due to the fluctuation of the film thickness within the tolerance range, the film pressing roller 34 and the rotating plate 31 will be pushed to swing slightly around the rotating axis 32, and the swing range is between 0°-5°, so as to compensate for the pressure on the film roll during winding, so that the film roll is evenly stressed during winding, which can reduce the problems of white wrinkles and deformation of the film during the winding process, thereby improving the overall quality of the film product.

[0058] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A film winding device, characterized in that: include: A winding component is used to wind up the film to form a film roll; The winding assembly is installed on the moving assembly and reciprocates along the setting direction of the moving assembly; A film pressing assembly is provided on one side of the winding assembly, and the film pressing assembly is in contact with the film roll; When the winding assembly is running, the moving assembly drives the winding assembly to move in a direction away from the film pressing assembly, and the film pressing assembly swings; The winding assembly comprises two winding seats arranged in parallel, and a bearing seat is integrally mounted on the winding seats; The bearing seat is provided with a tensioning shaft via a bearing, and any axial end of the tensioning shaft is connected to a first driving mechanism, and the first driving mechanism is connected to the winding seat; The moving assembly comprises a slide rail, a slider is arranged on the slide rail, and the slider is connected to the winding seat; The moving assembly also includes a second driving mechanism, a reducer is provided at the output end of the second driving mechanism, a coupling is provided on one side of the reducer, the coupling is connected to a screw rod, the other side of the screw rod is connected to the winding seat through a support, a screw rod nut seat is provided on the screw rod, the axial direction of the screw rod is perpendicular to the axial direction of the tensioning shaft, and is parallel to the setting direction of the slide rail; The film pressing assembly comprises a rotating plate, on which a rotating shaft is arranged, so that the rotating plate rotates along the axial direction of the rotating shaft, and the swing range is 0°-5°; The rotating plate is provided with a telescopic member, a film pressing roller is installed on one side of the telescopic member, and the film pressing roller is located on one side of the tensioning shaft; During the winding process, the first driving mechanism drives the tensioning shaft to rotate at a constant speed for winding, and the second driving mechanism controls the moving component to decelerate; The diameter of the film roll increases, pushing the film pressing roller to move outward and the telescopic part to become longer.

2. The winding device according to claim 1, characterized in that: Two clamping wheels are provided on the tensioning shaft. A positioning member is provided on one side of the clamping wheel close to the bearing seat. The positioning member limits the axial movement of the clamping wheel along the tensioning shaft.

3. The winding device according to claim 1, characterized in that: The winding assembly, the moving assembly and the film pressing assembly are arranged in a vacuum environment.

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