Optical film rewinder

Abstract

This utility model discloses an optical thin film rewinding machine, aiming to provide an optical thin film rewinding machine that can not only perform timely and accurate correction of optical film during the rewinding process to ensure that the end face of the rewound optical thin film material is neat; but also has a simple structure and low manufacturing cost. It includes: a frame, a slidingly connected movable frame; an unwinding device, including an unwinding frame for mounting the film roll to be rewound, the unwinding frame being mounted on the movable frame; a winding device, including a winding frame mounted on the frame, a winding core detachably mounted on the winding frame, and a winding mechanism for driving the winding core to rotate, the moving direction of the movable frame being parallel to the axial direction of the winding core; a correction mechanism, including: a fixedly mounted correction probe located on the transmission path of the optical film between the film roll and the winding core, detecting the position of the optical film in the axial direction of the winding core; and a correction execution mechanism driving the movable frame to translate.

Description

Technical Field

[0001] This utility model relates to the field of optical thin film rewinding technology, specifically to an optical thin film rewinding machine. Background Technology

[0002] Optical thin film rewinding involves rewinding film rolls with uneven or defective end faces. This is achieved through a web-correcting mechanism and controlled unwinding / rewinding tension to straighten the end faces of the optical thin film. Optical thin film rewinding machines typically include an unwinding unit, a winding unit, and a web-correcting mechanism. The film roll to be rewound (i.e., the roll with uneven end faces) is mounted on the unwinding unit, which releases the optical film and then rewinds it onto the winding core of the winding unit. During this process, the web-correcting mechanism corrects the optical film's alignment to ensure the rewound material has neat end faces. However, current web-correcting mechanisms in thin film rewinding machines generally rely on moving guide rollers, which not only have poor correction efficiency but also involve complex structures and high manufacturing costs. For example, Chinese Patent Publication No. CN102275758B, entitled "A Rewinding Machine for Roll Film with a Highly Sensitive Correction Mechanism," includes a horizontally mounted unwinding device and a winding device on a vertical chassis plate, two axially moving unwinding guide rollers connected by a connecting plate, a horizontal correction motor with a screw and nut mechanism, a photoelectric sensor, and a vertical swing rod between the connecting plate and the screw and nut mechanism. Three rod-end bearings are fitted onto the upper, middle, and lower ends of the swing rod, and the upper rod-end bearing is fixedly connected to the connecting plate. The middle rod end bearing forms a fulcrum as a fixed connecting component, while the lower rod end bearing is fixedly connected to the nut of the lead screw nut mechanism. The rod end bearing consists of a bearing housing, a copper bushing, and balls. One end of the bearing housing has a seat hole into which the copper bushing is inlaid. The inner wall of the copper bushing is spherical, and the balls are inlaid within it. The outer surface of the balls is also spherical. The spherical inner wall of the copper bushing and the outer spherical surface of the balls form a pair of friction pairs with spherical sliding contact surfaces. The center of the balls is a through hole for inserting into the rocker arm. The other end of the bearing housing is a threaded connection end. Although the roll film rewinding machine of this application can correct the deviation of the roll film, it also suffers from complex structure and high manufacturing cost. Utility Model Content

[0003] The purpose of this invention is to provide an optical film rewinding machine that can not only perform timely and accurate correction of optical films during the optical film rewinding process to ensure that the end faces of the rewound optical film material are neatly folded, but also has a simple structure and low manufacturing cost.

[0004] The technical solution of this utility model is: An optical thin film rewinding machine, comprising: The frame includes a sliding connection for the movable frame. The unwinding device includes an unwinding frame for mounting the film roll to be rewound, the unwinding frame being mounted on a movable frame; The winding device includes a winding frame mounted on a frame, a winding core detachably mounted on the winding frame, and a winding mechanism for driving the winding core to rotate. The moving direction of the moving frame is parallel to the axial direction of the winding core. Corrective bodies include: A fixed-position correction probe is located on the transmission path of the optical film between the film roll and the take-up core to detect the position of the optical film in the axial direction of the take-up core. The correction mechanism drives the moving frame to translate. The specific operation of an optical thin film rewinding machine according to this solution is as follows: The film roll to be rewound (i.e., the film roll with uneven end faces) is installed on the unwinding frame of the unwinding device. The unwinding device releases the optical film from the film roll and then rewinds it onto the take-up core of the take-up device. During this process, the correction probe detects the position of the optical film on the take-up core axis in real time. If the correction probe detects that the position of the optical film on the take-up core axis deviates from the set reference position, the correction actuator drives the moving frame, the unwinding frame, and the film roll on the unwinding frame to translate a set distance, so that the position of the optical film on the take-up core axis is maintained at the set reference position, thereby correcting the optical film during the rewinding process. At the same time, since the correction actuator directly drives the film roll on the unwinding frame to translate by driving the moving frame, it can efficiently, timely and accurately correct the deviation, ensuring that the end faces of the rewound optical film material are neatly folded.

[0005] On the other hand, the correction mechanism of this solution detects the position of the optical film on the winding core axis by a correction probe, and drives the moving frame to translate by a correction actuator to achieve correction. Its structure is simple, its manufacturing cost is low, and it is conducive to controlling production costs.

[0006] Preferably, the system also includes a splicing stage. The movable frame is equipped with several guide rollers. The optical film on the film roll sequentially passes over each guide roller on the movable frame and is wound onto a take-up core. The splicing stage is located on the movable frame and between two guide rollers, with its platform facing upwards and positioned below and close to the optical film. During the rewinding process, if a defective optical film is observed, the optical film rewinding machine can be paused when the defective optical film is conveyed to the splicing stage. Then, the defective portion of the optical film is completely cut off on the splicing stage, and the optical film is spliced. The optical film rewinding machine then restarts for rewinding. This also removes defective optical film material from the film roll to be rewound.

[0007] Preferably, a pressure roller mechanism is also included, comprising: The pressure roller arm is rotatably mounted on the machine frame; The pressure roller is rotatably mounted on the pressure roller arm; The pressure roller arm drive mechanism, located between the frame and the pressure roller arm, drives the pressure roller arm to rotate, causing the pressure roller to press against the optical film on the take-up core. During rewinding, the pressure roller arm drive mechanism can drive the pressure roller arm to rotate, causing the pressure roller to press against the optical film on the take-up core, thereby providing the set winding pressure, removing air from the optical film roll rewound to the take-up core, and preventing defects such as bulging.

[0008] Preferably, both the pressure roller arm and the pressure roller are located above the take-up core, and the pressure roller arm drive mechanism is composed of a cylinder. In this way, during the rewinding process, when the cylinder provides the winding pressure, it is not necessary to overcome the weight of the pressure roller, and the gravity of the pressure roller arm and the pressure roller can act directly on the optical film of the take-up core.

[0009] Preferably, the correction probe is located between the frame and the moving frame; or the correction probe and the frame are located on the same side of the moving frame, with the correction probe close to the moving frame; or the correction probe and the moving frame are located on the same side of the frame, with the correction probe close to the frame. This design places the correction probe close to the moving frame. Thus, during the rewinding process, after the optical film is released from the roll to be rewound, the correction probe can promptly detect the optical film's position on the take-up core axis, allowing the correction actuator sufficient time to correct the optical film before rewinding it back onto the take-up core.

[0010] Preferably, the correction probe is an ultrasonic sensor, a photoelectric sensor, or a grating sensor, and includes a detection groove through which one edge of the optical film passes. In this way, the correction probe can accurately detect the position of the optical film along the axial direction of the winding core.

[0011] Preferably, the correction mechanism is mounted on the frame, and the correction mechanism is either an electric cylinder or a linear module. In this way, the translation distance of the moving frame can be precisely controlled by the electric cylinder or the linear module, achieving precise correction.

[0012] Preferably, the frame is provided with several drive rollers and a roller drive mechanism. The optical film on the film roll passes sequentially around each drive roller and is wound onto the take-up core. Each drive roller is driven to rotate synchronously by the same roller drive mechanism, which includes: The drive pulley is mounted on the frame and rotates. A roller drive motor, mounted on the frame, drives the drive pulley to rotate; The synchronous belt passes sequentially around the drive pulley and each drive roller. In this way, all drive rollers can be driven to rotate synchronously by a single roller drive mechanism, reducing manufacturing costs and ensuring synchronous rotation of all drive rollers.

[0013] Preferably, the movable frame is equipped with a movable frame guide rail, which is parallel to the axis of the take-up core. The unwinding frame includes a pair of unwinding arms that slide along the movable frame guide rail. Each unwinding arm is equipped with a rotating chuck. The rotation axes of the rotating chucks on the pair of unwinding arms are coaxial and parallel to the guide rail. At least one of the unwinding arms is equipped with a chuck driving mechanism, which drives the corresponding rotating chuck to rotate. The film roll is detachably mounted between the rotating chucks on the pair of unwinding arms. In this way, the film roll to be rewound can be mounted between the rotating chucks on the pair of unwinding arms, and the corresponding rotating chuck is driven to rotate by the chuck driving mechanism, thereby rotating the film roll to be rewound to release the optical film on the film roll.

[0014] Preferably, the frame is equipped with a frame guide rail, which is parallel to the axial direction of the take-up core. The take-up frame includes a pair of take-up arms that slide along the frame guide rail. Each take-up arm is equipped with a rotating chuck, and the rotation axes of the rotating chucks on the pair of take-up arms are coaxial and parallel to the frame guide rail. The take-up core is detachably mounted between the rotating chucks on the pair of take-up arms. The take-up mechanism includes a take-up motor, which is mounted on the take-up arm and drives the rotating chucks on the take-up arm to rotate. During the rewinding process, the take-up core is rotated by the take-up motor, and the optical film is rewound onto the take-up core.

[0015] The beneficial effects of this utility model are: The film roll to be rewound (i.e., the film roll with uneven end faces) is installed on the unwinding frame of the unwinding device. The unwinding device releases the optical film from the film roll and then rewinds it onto the take-up core of the take-up device. During this process, the correction probe detects the position of the optical film on the take-up core axis in real time. If the correction probe detects that the position of the optical film on the take-up core axis deviates from the set reference position, the correction actuator drives the moving frame, the unwinding frame, and the film roll on the unwinding frame to translate a set distance, so that the position of the optical film on the take-up core axis is maintained at the set reference position, thereby correcting the optical film during the rewinding process. At the same time, since the correction actuator directly drives the film roll on the unwinding frame to translate by driving the moving frame, it can efficiently, timely and accurately correct the deviation, ensuring that the end faces of the rewound optical film material are neatly folded.

[0016] On the other hand, the correction mechanism detects the position of the optical film on the winding core axis by a correction probe, and drives the moving frame to translate by a correction actuator to achieve correction. Its structure is simple, its manufacturing cost is low, and it is conducive to controlling production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an optical thin film rewinding machine according to the present invention.

[0018] In the picture: Rack 1, mobile rack 1.1; 2. Rewinding device; 2.1. Rewinding frame; 2.2. Rewinding core; Unwinding device 3, unwinding frame 3.1; Correction mechanism 4, correction probe 4.1, correction actuator 4.2; membrane roll 5; Pressure roller mechanism 6, pressure roller arm 6.1, pressure roller 6.2, pressure roller arm drive mechanism 6.3; 7. Film attachment platform; Guide roller 8; Drive roller 9; Optical thin film 10. Detailed Implementation

[0019] Specific Implementation Example 1, such as Figure 1 As shown, an optical thin film rewinding machine includes a frame 1, an unwinding device 3, a winding device 2, and a web-correcting mechanism 4.

[0020] A movable frame 1.1 is slidably connected to the frame 1. In this embodiment, the movable frame 1.1 moves in the horizontal direction.

[0021] The unwinding device 3 is used to unwind the optical film 10 of the film roll 5 to be rewound. The unwinding device 3 includes an unwinding frame 3.1, which is mounted on the movable frame 1.1. The unwinding frame 3.1 is used to mount the film roll 5 to be rewound.

[0022] The winding device 2 includes a winding frame 2.1 mounted on the frame 1, a winding core 2.2 detachably mounted on the winding frame 2.1, and a winding mechanism for driving the winding core 2.2 to rotate. The winding mechanism includes a winding motor. The moving direction of the moving frame 1.1 is parallel to the axial direction of the winding core 2.2.

[0023] The web-correction mechanism 4 includes a fixedly mounted web-correction probe 4.1 and a web-correction execution mechanism 4.2. In this embodiment, the web-correction probe 4.1 is fixedly mounted on the frame 1 via a mounting bracket. The web-correction probe 4.1 is located on the transmission path of the optical film 10 between the film roll 5 and the take-up core 2.2. The web-correction probe 4.1 is used to detect the position of the optical film 10 in the axial direction of the take-up core 2.2. The web-correction execution mechanism 4.2 drives the moving frame 1.1 to translate. In this embodiment, the web-correction execution mechanism 4.2 is mounted on the frame 1 and is either an electric cylinder or a linear module. Thus, the translation distance of the moving frame 1.1 can be precisely controlled by the electric cylinder or linear module to achieve precise web-correction.

[0024] The specific operation of an optical thin film rewinding machine according to this embodiment is as follows. The film roll 5 to be rewound (i.e., the film roll 5 with uneven end faces) is installed on the unwinding frame 3.1 of the unwinding device 3. The unwinding device 3 releases the optical film 10 of the film roll 5 and then rewinds it onto the take-up core 2.2 of the take-up device 2. During this process, the correction probe 4.1 detects in real time the position of the optical film 10 in the axial direction of the take-up core 2.2. If the correction probe 4.1 detects that the position of the optical film 10 in the axial direction of the take-up core 2.2 deviates from the set reference position, the correction actuator 4. 2. The drive moving frame 1.1, the unwinding frame 3.1, and the film roll 5 on the unwinding frame 3.1 are moved a set distance to keep the optical film 10 at the set reference position in the axial direction of the take-up core 2.2, thereby correcting the optical film 10 during the rewinding process; at the same time, since the correction execution mechanism 4.2 directly drives the film roll 5 on the unwinding frame 3.1 to move by driving the moving frame 1.1, it can efficiently, timely and accurately correct the deviation, ensuring that the end face of the rewound optical film 10 is neatly folded.

[0025] On the other hand, the correction mechanism 4 of this solution detects the position of the optical film 10 on the winding core 2.2 axially through the correction probe 4.1, and drives the moving frame 1.1 to translate through the correction execution mechanism 4.2 to achieve correction. Its structure is simple, the manufacturing cost is low, and it is conducive to controlling production costs.

[0026] Specific embodiment two, such as Figure 1 As shown, an optical thin film rewinding machine includes a frame 1, an unwinding device 3, a winding device 2, and a web-correcting mechanism 4.

[0027] A movable frame 1.1 is slidably connected to the frame 1. In this embodiment, the frame 1 is provided with horizontally distributed tracks, and the movable frame 1.1 is slidably connected to the tracks, and the movable frame 1.1 moves in the horizontal direction.

[0028] The unwinding device 3 is used to unwind the optical film 10 of the film roll 5 to be rewound. The unwinding device 3 includes an unwinding frame 3.1, which is mounted on the movable frame 1.1. The unwinding frame 3.1 is used to mount the film roll 5 to be rewound.

[0029] The winding device 2 includes a winding frame 2.1 mounted on the frame 1, a winding core 2.2 detachably mounted on the winding frame 2.1, and a winding mechanism for driving the winding core 2.2 to rotate. The winding mechanism includes a winding motor. The moving direction of the moving frame 1.1 is parallel to the axial direction of the winding core 2.2. The axis of the film roll 5 to be rewound is parallel to the axis of the winding core 2.2. A core is located at the center of the film roll 5, and the optical film 10 of the film roll 5 is wound on the core, which has the same structure as the winding core 2.2.

[0030] The correction mechanism 4 includes a fixed correction probe 4.1 and a correction execution mechanism 4.2. In this embodiment, the correction probe 4.1 is fixedly mounted on the frame 1 by a mounting bracket.

[0031] The alignment probe 4.1 is located on the transmission path of the optical film 10 between the film roll 5 and the take-up core 2.2. The alignment probe 4.1 is used to detect the position of the optical film 10 along the axial direction of the take-up core 2.2. In this embodiment, the alignment probe 4.1 is an ultrasonic sensor, a photoelectric sensor, or a grating sensor. The alignment probe 4.1 includes a detection groove, through which one edge of the optical film 10 passes. Thus, the alignment probe 4.1 can accurately detect the position of the optical film 10 along the axial direction of the take-up core 2.2.

[0032] The correction actuator 4.2 drives the moving frame 1.1 to translate. In this embodiment, the correction actuator 4.2 is mounted on the frame 1 and is either an electric cylinder or a linear module. Thus, the translation distance of the moving frame 1.1 can be precisely controlled by the electric cylinder or linear module, achieving precise correction.

[0033] In one example, such as Figure 1 As shown, the correction probe 4.1 is located between the frame 1 and the moving frame 1.1. By positioning the correction probe 4.1 close to the moving frame 1.1, during the rewinding process, after the optical film 10 is released from the film roll 5 to be rewound, the correction probe 4.1 can promptly detect the axial position of the optical film 10 on the take-up core 2.2, allowing the correction actuator 4.2 sufficient time to correct the optical film 10 before rewinding it back onto the take-up core 2.2.

[0034] In another example, the correction probe 4.1 is located on the same side of the moving frame 1.1 as the frame 1, and the correction probe 4.1 is close to the moving frame 1.1. By positioning the correction probe 4.1 close to the moving frame 1.1, during the rewinding process, after the optical film 10 is released from the film roll 5 to be rewound, the correction probe 4.1 can promptly detect the axial position of the optical film 10 on the take-up core 2.2, allowing the correction actuator 4.2 sufficient time to correct the optical film 10 before rewinding it back onto the take-up core 2.2.

[0035] In the third example, the correction probe 4.1 and the moving frame 1.1 are located on the same side of the frame 1, and the correction probe 4.1 is close to the frame 1. By positioning the correction probe 4.1 close to the moving frame 1.1, during the rewinding process, after the optical film 10 is released from the film roll 5 to be rewound, the correction probe 4.1 can promptly detect the axial position of the optical film 10 on the take-up core 2.2, allowing the correction actuator 4.2 sufficient time to correct the optical film 10 before rewinding it back onto the take-up core 2.2.

[0036] The specific operation of an optical thin film rewinding machine according to this embodiment is as follows. The film roll 5 to be rewound (i.e., the film roll 5 with uneven end faces) is installed on the unwinding frame 3.1 of the unwinding device 3. The unwinding device 3 releases the optical film 10 of the film roll 5 and then rewinds it onto the take-up core 2.2 of the take-up device 2. During this process, the correction probe 4.1 detects in real time the position of the optical film 10 in the axial direction of the take-up core 2.2. If the correction probe 4.1 detects that the position of the optical film 10 in the axial direction of the take-up core 2.2 deviates from the set reference position, the correction actuator 4. 2. The drive moving frame 1.1, the unwinding frame 3.1, and the film roll 5 on the unwinding frame 3.1 are moved a set distance to keep the optical film 10 at the set reference position in the axial direction of the take-up core 2.2, thereby correcting the optical film 10 during the rewinding process; at the same time, since the correction execution mechanism 4.2 directly drives the film roll 5 on the unwinding frame 3.1 to move by driving the moving frame 1.1, it can efficiently, timely and accurately correct the deviation, ensuring that the end face of the rewound optical film 10 is neatly folded.

[0037] On the other hand, the correction mechanism 4 of this solution detects the position of the optical film 10 on the winding core 2.2 axially through the correction probe 4.1, and drives the moving frame 1.1 to translate through the correction execution mechanism 4.2 to achieve correction. Its structure is simple, the manufacturing cost is low, and it is conducive to controlling production costs.

[0038] Furthermore, the movable frame 1.1 is provided with a movable frame guide rail. The movable frame guide rail is parallel to the axial direction of the take-up core 2.2. The unwinding frame 3.1 includes a pair of unwinding arms (a pair of unwinding arms refers to two unwinding arms). The unwinding arms slide along the movable frame guide rail. The unwinding arms can be driven manually or automatically. In this embodiment, the unwinding arms are driven by an automatic drive mechanism, which drives the pair of unwinding arms to move closer or further apart. The automatic drive mechanism is a pneumatic cylinder, an electric cylinder, or a linear module.

[0039] Each unwinding arm is equipped with a rotating chuck. The rotation axes of the rotating chucks on a pair of unwinding arms are coaxial and parallel to the guide rail. At least one of the pair of unwinding arms is equipped with a chuck drive mechanism. In this embodiment, one of the unwinding arms in the pair is equipped with a chuck drive mechanism, which includes a chuck drive motor. The chuck drive mechanism drives the corresponding rotating chuck to rotate.

[0040] The membrane roll 5 is detachably mounted between rotating chucks on a pair of unwinding arms. Specifically, the core at the center of the membrane roll 5 is a hollow cylindrical structure. The pair of unwinding arms are brought close together, so that the rotating chucks on the pair of unwinding arms are inserted into both ends of the core at the center of the membrane roll 5 and clamp the ends of the core, thereby mounting the membrane roll 5 between the rotating chucks on the pair of unwinding arms. During disassembly, the pair of unwinding arms separate to release the core at the center of the membrane roll 5.

[0041] After the film roll 5 is installed between the rotating chucks on a pair of unwinding arms, the corresponding rotating chucks can be driven to rotate by the chuck drive mechanism, thereby rotating the film roll 5 to be rewound, so as to release the optical film 10 on the film roll 5.

[0042] Furthermore, the frame 1 is equipped with a frame guide rail. The frame guide rail is parallel to the axial direction of the take-up core 2.2. The take-up frame 2.1 includes a pair of take-up arms (a pair of take-up arms refers to two unwinding arms), which slide along the frame guide rail. The take-up arms can be driven manually or automatically. In this embodiment, the take-up arms are driven by an automatic drive mechanism, which drives the pair of take-up arms to move closer or further apart. The automatic drive mechanism is a pneumatic cylinder, an electric cylinder, or a linear module.

[0043] Each take-up arm is equipped with a rotating chuck. The rotation axes of the rotating chucks on a pair of take-up arms are coaxial and parallel to the frame guide rail. A take-up motor is mounted on one of the take-up arms, driving the rotating chuck on the take-up arm to rotate. The take-up core 2.2 is a hollow cylindrical structure. The take-up core 2.2 is detachably mounted between the rotating chucks on a pair of take-up arms. Specifically, the pair of take-up arms are brought close together, so that the rotating chucks on the pair of take-up arms are inserted into both ends of the take-up core 2.2 and clamp the ends of the take-up core 2.2, thereby mounting the take-up core 2.2 between the rotating chucks on a pair of take-up arms. During disassembly, the pair of take-up arms separate to release the take-up core 2.2. During rewinding, the rotating chuck is driven to rotate by the take-up motor, thereby driving the take-up core 2.2 to rotate, rewinding the optical film 10 onto the take-up core 2.2.

[0044] Furthermore, such as Figure 1 As shown, an optical film rewinding machine also includes a splicing table 7. A plurality of rotatably mounted guide rollers 8 are provided on the moving frame 1.1. The guide rollers 8 are parallel to the take-up core 2.2. The optical film 10 on the film roll 5 passes sequentially around each guide roller 8 on the moving frame 1.1 and is wound onto the take-up core 2.2. The splicing table 7 is located on the moving frame 1.1 and between two guide rollers 8 on the moving frame 1.1. The table surface of the splicing table 7 faces upwards, and the table surface of the splicing table 7 is located below and close to the optical film 10. During the rewinding process, if a defective optical film 10 is observed, the optical film rewinding machine can be paused when the defective optical film 10 is conveyed to the splicing table 7; then, the defective portion of the optical film 10 is completely cut off on the table surface of the splicing table 7, and then the optical film 10 is spliced; then, the optical film rewinding machine restarts to perform rewinding. In this way, defective optical film 10 material in the film roll 5 to be rewound can also be removed.

[0045] Furthermore, such as Figure 1As shown, the frame 1 is equipped with several drive rollers 9 and a roller drive mechanism. The drive rollers 9 are parallel to the take-up core 2.2. The optical film 10 on the film roll 5 passes around each drive roller 9 in sequence and is wound onto the take-up core 2.2. Specifically, the optical film 10 on the film roll 5 passes around each guide roller and each drive roller 9 in sequence and is wound onto the take-up core 2.2. Each drive roller 9 is driven to rotate synchronously by the same roller drive mechanism. The roller drive mechanism includes a drive pulley, a roller drive motor, and a synchronous belt. The drive pulley is rotatably mounted on the frame 1. The roller drive motor is mounted on the frame 1 and drives the drive pulley to rotate. The synchronous belt passes around the drive pulley and each drive roller 9 in sequence. In this way, each drive roller 9 can be driven to rotate synchronously by the same roller drive mechanism, reducing manufacturing costs and ensuring that each drive roller 9 rotates synchronously.

[0046] Furthermore, such as Figure 1 As shown, an optical film rewinding machine further includes a pressure roller mechanism 6. The pressure roller mechanism 6 provides a set winding pressure for the optical film 10 wound on the take-up core 2.2. The pressure roller mechanism 6 includes a pressure roller arm 6.1, a pressure roller 6.2, and a pressure roller arm drive mechanism 6.3. The pressure roller arm 6.1 is rotatably mounted on the frame 1. The pressure roller 6.2 is rotatably mounted on the pressure roller arm 6.1. The pressure roller 6.2 is parallel to the take-up core 2.2. The pressure roller arm drive mechanism 6.3 is located between the frame 1 and the pressure roller arm 6.1. The pressure roller arm drive mechanism 6.3 drives the pressure roller arm 6.1 to rotate so that the pressure roller 6.2 presses against the optical film 10 on the take-up core 2.2. In this embodiment, the pressure roller arm drive mechanism 6.3 is composed of a cylinder. During the rewinding process, the pressure roller arm 6.1 can be driven to rotate by the pressure roller arm drive mechanism 6.3, so that the pressure roller 6.2 presses against the optical film 10 of the take-up core 2.2, thereby providing the set take-up pressure, removing the air in the rewinding of the optical film 10 roll 5 of the take-up core 2.2, and avoiding defects such as bulging.

[0047] Furthermore, such as Figure 1 As shown, both the pressure roller arm 6.1 and the pressure roller 6.2 are located above the take-up core 2.2. Thus, during the rewinding process, when the cylinder provides the winding pressure, it is not necessary to overcome the weight of the pressure roller 6.2; the gravity of the pressure roller arm 6.1 and the pressure roller 6.2 can directly act on the optical film 10 of the take-up core 2.2.

[0048] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An optical thin film rewinding machine, characterized in that, include: The frame includes a sliding connection for the movable frame. The unwinding device includes an unwinding frame for mounting the film roll to be rewound, the unwinding frame being mounted on a movable frame; The winding device includes a winding frame mounted on a frame, a winding core detachably mounted on the winding frame, and a winding mechanism for driving the winding core to rotate. The moving direction of the moving frame is parallel to the axial direction of the winding core. Corrective bodies include: A fixed-position correction probe is located on the transmission path of the optical film between the film roll and the take-up core to detect the position of the optical film in the axial direction of the take-up core. The correction mechanism drives the moving frame to translate.

2. The optical thin film rewinding machine according to claim 1, characterized in that, It also includes a film splicing platform. The movable frame is provided with several guide rollers. The optical film on the film roll passes around each guide roller on the movable frame in sequence and is wound onto the winding core. The film splicing platform is located on the movable frame and between two guide rollers on the movable frame. The platform surface of the film splicing platform is set upward and is located below and close to the optical film.

3. The optical thin film rewinding machine according to claim 1, characterized in that, It also includes a pressure roller mechanism, which comprises: The pressure roller arm is rotatably mounted on the machine frame; The pressure roller is rotatably mounted on the pressure roller arm; The pressure roller arm drive mechanism is located between the frame and the pressure roller arm, and drives the pressure roller arm to rotate so that the pressure roller presses against the optical film of the take-up core.

4. An optical thin film rewinding machine according to claim 3, characterized in that, Both the pressure roller arm and the pressure roller are located above the take-up core, and the pressure roller arm drive mechanism is composed of a cylinder.

5. An optical thin film rewinding machine according to claim 1, 2, 3, or 4, characterized in that, The correction probe is located between the frame and the moving frame; or the correction probe and the frame are located on the same side of the moving frame, and the correction probe is close to the moving frame; or the correction probe and the moving frame are located on the same side of the frame, and the correction probe is close to the frame.

6. An optical thin film rewinding machine according to claim 1, 2, 3, or 4, characterized in that, The correction probe is an ultrasonic sensor, a photoelectric sensor, or a grating sensor. The correction probe includes a detection groove, and one edge of the optical thin film passes through the detection groove.

7. An optical thin film rewinding machine according to claim 1, 2, 3, or 4, characterized in that, The correction mechanism is mounted on the frame and can be an electric cylinder or a linear module.

8. An optical thin film rewinding machine according to claim 1, 2, 3, or 4, characterized in that, The frame is equipped with several drive rollers and roller drive mechanisms. The optical film on the film roll passes sequentially around each drive roller and is wound onto the take-up core. Each drive roller is driven to rotate synchronously by the same roller drive mechanism, which includes: The drive pulley is mounted on the frame and rotates. A roller drive motor, mounted on the frame, drives the drive pulley to rotate; The timing belt passes sequentially around the drive pulley and each drive roller.

9. An optical thin film rewinding machine according to claim 1, 2, or 3, characterized in that, The movable frame is equipped with a movable frame guide rail, which is parallel to the axis of the take-up core. The unwinding frame includes a pair of unwinding arms that slide along the movable frame guide rail. Each unwinding arm is equipped with a rotating chuck. The rotation axes of the rotating chucks on the pair of unwinding arms are coaxial and parallel to the guide rail. At least one of the pair of unwinding arms is equipped with a chuck driving mechanism, which drives the corresponding rotating chuck to rotate. The film roll is detachably mounted between the rotating chucks on the pair of unwinding arms.

10. An optical thin film rewinding machine according to claim 1, 2, or 3, characterized in that, The frame is equipped with a frame guide rail, which is parallel to the axial direction of the take-up core. The take-up frame includes a pair of take-up arms that slide along the frame guide rail. Each take-up arm is equipped with a rotating chuck. The rotation axes of the rotating chucks on the pair of take-up arms are coaxial and parallel to the frame guide rail. The take-up core is detachably mounted between the rotating chucks on the pair of take-up arms. The take-up mechanism includes a take-up motor, which is mounted on the take-up arm and drives the rotating chucks on the take-up arm to rotate.

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