Automatic polarizing film pulling film threading device and method

Abstract

The application discloses a kind of polarizing sheet traction film automatic threading device and method, including water tank for soaking film and roller for conveying film, still include: traction mechanism: front end winding device, end unwinding device, positioning pin and buckle type pulley;Membrane clamping mechanism: pull rope clamp, pressing handle, clamping plate and first locking bolt;Control mechanism: control module, position switch and tension sensor, the setting and mutual cooperation of above-mentioned mechanism, successfully realize automatic threading operation, improve production efficiency, reduce the labor intensity of staff, improve the security of threading operation, the setting of buckle type pulley, since installation and removal are convenient, improve the use convenience of the device, and effectively avoid the occupation of production space, also utilize control module when tension sensor detects tension increase Control front end winding device and end unwinding device synchronous speed reduction, improve the security of film in threading operation process.

Description

Technical Field

[0001] This invention relates to the field of polarizer production technology, specifically to an automatic fabrication device and method for polarizer traction film. Background Technology

[0002] The full name of polarizer is polarizing film, which is a major component of liquid crystal displays and is widely used in computer, television, and mobile phone screens. Its production is mainly divided into three processes: the front process (TAC film pretreatment, PVA film dyeing, stretching and lamination), the middle process (coating and lamination production line), and the back process (cutting production line). Among them, the front process is the most important. The film material is treated, dyed and stretched in a chemical solution with a certain ratio, and then laminated with different adhesives to finally produce polarizer. During the production process, the film passes through various rollers to complete each process. Some films pass through rollers at different heights or even need to go up and down floors. Some films shuttle back and forth in water tanks to increase the immersion time of the film in the solution. Therefore, the film passing operation requires a lot of manual labor and is the most important work in the production of polarizer.

[0003] Currently, in actual production, the fabric threading operation of polarizing film production lines is carried out manually by workers. Specifically, workers manually pull the traction film from the end of the previous process to the beginning of the next process, and according to the actual processing needs, they sequentially start the equipment laid out along the way based on the position of the film material during the traction process.

[0004] However, the aforementioned common production methods not only have high production costs due to high labor costs, but also have problems such as long commissioning time and high equipment idle rate. Furthermore, in some practical situations where the space is narrow or the fabric threading position has a large height difference, manual fabric threading is very difficult and may even pose safety hazards to operators. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic fabrication device and method for polarizing film traction film to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] An automatic fabric feeding device for polarizing film includes a water tank for soaking the film and rollers for conveying the film, and further includes:

[0008] Traction mechanism: front winding device, end unwinding device, positioning pin and snap-on pulley;

[0009] Membrane clamping mechanism: pull rope clamp, pressure handle, clamping plate and first locking bolt;

[0010] Control mechanism: control module, position switch, and tension sensor;

[0011] The front winding device and the end unwinding device are respectively located at both ends of the water tank. The positioning pins are fixedly connected to both ends of each roller. The snap-on pulleys are detachably fixedly connected to both ends of each roller via the positioning pins. The front winding device includes a winding core and a rotating shaft. Both ends of the rotating shaft are fitted with wire grooves. A pull rope is attached to the wire groove. The other end of the pull rope is connected to the film clamping mechanism. The two proximal ports of the pull rope clamp are fixedly connected to the pressure handle. The pull rope is inserted into the pull rope clamp through the pressure handle. The pressure handle clamps the two clamping plates with a first locking bolt. One end of the film is clamped between the two clamping plates. The position switch is located near the front winding device. It is triggered when the film clamping mechanism passes the front winding device and controls the front winding device and the end unwinding device to stop synchronously via the control module. The tension sensor is located on the roller to detect the tension of the film as it passes the roller. When the tension sensor detects an increase in tension, the control module controls the front winding device to slow down to reduce the tension of the pull rope and prevent the film from breaking.

[0012] Preferably, both the upper and lower ends of the outer side of the pull rope clamp are rounded and pointed, so that the pull rope clamp will not come off when it passes through the snap-on pulley fixedly connected to the roller.

[0013] Preferably, there are multiple rollers, and the multiple rollers are at different heights.

[0014] Preferably, the snap-fit ​​pulley includes a left half-wheel and a right half-wheel. One end of the left half-wheel is provided with an outer connecting ring, and the end of the right half-wheel near the outer connecting ring is provided with an inner connecting ring. The inner connecting ring and the outer connecting ring are rotatably connected by a rotating shaft. Connecting blocks are fixedly connected to the front of the left half-wheel and the right half-wheel near the ends away from the rotating shaft. The two connecting blocks are detachably fixedly connected by a second locking bolt.

[0015] Preferably, a positioning port is provided on the inner arc surface of the right half wheel, and the positioning port is engaged with the positioning pin to limit the position of the snap-on pulley.

[0016] Preferably, the inner surfaces of the left and right half-wheels are provided with rotating grooves, and ball bearings are provided inside the rotating grooves. Both the left and right half-wheels are provided with semi-rotating rings located at the rotating grooves, with both sides of the semi-rotating rings extending into the rotating grooves and contacting the ball bearings.

[0017] Preferably, the outer diameter of the semi-rotary ring is larger than the outer diameter of the roller, so that the film can pass smoothly between the rollers during the fabric feeding process and the film clamping mechanism does not scrape against the rollers.

[0018] Preferably, the control module, position switch, tension sensor, front winding device, and end unwinding device are connected in data communication.

[0019] A method for using an automatic fabric threading device for polarizing film traction includes the following steps:

[0020] Step 1: Install snap-on pulleys at both ends of the roller at the positioning pins, ensuring that the snap-on pulleys on each side are in the same plane;

[0021] Step 2: Attach one end of each of the two pull ropes to the two grooves in the front winding device, insert the other end of the pull ropes into the pull rope clamp through the gap between the pressure handles, place the end of the film between the two clamps, and finally fix the film clamping mechanism to the film by tightening the first locking bolt.

[0022] Step 3: Set the tension of the front winding device through the control module. The front winding device and the end unwinding device move synchronously, pulling the pull rope. The pull rope pulls the film forward synchronously through the film clamping mechanism.

[0023] Step 4: During the process of pulling the film with the rope, the tension sensor monitors the tension in real time. When it is measured that the tension on the film take-up side increases due to the change in direction when the film passes the snap-on pulley, the control module will control the front winding device and the end unwinding device to decelerate synchronously.

[0024] Step 5: When the film clamping mechanism moves to the front of the front winding device, it will contact and trigger the position switch. The control module will control the front winding device and the end unwinding device to stop synchronously, thus completing the fabric threading operation.

[0025] Step 6: Disassemble the film clamping mechanism, attach the film to the winding core for winding, and remove all the snap-on pulleys to make room for production operations.

[0026] The beneficial effects of this invention are:

[0027] 1. Through the setup and collaboration of the traction mechanism, film clamping mechanism, and control mechanism, automated fabric threading operation has been successfully achieved. Compared with manual fabric threading, production efficiency has been greatly improved, while reducing the labor intensity of workers and greatly improving the safety of fabric threading operation. The snap-on pulley design makes the device easy to install and disassemble, improving its usability and effectively avoiding the occupation of production space. Furthermore, the control module controls the front winding device and the end unwinding device to reduce speed synchronously when the tension sensor detects an increase in tension, quickly adjusting the tension of the pull rope and improving the safety of the film during the fabric threading process.

[0028] 2. This invention utilizes the fact that the outer diameter of the semi-rotary ring is larger than the outer diameter of the roller, so that when the pull rope clamp passes over the outer surface of the semi-rotary ring during the fabric feeding process, the film can pass smoothly between the rollers without the film clamping mechanism scraping against the rollers. This greatly reduces the wear rate of the device during use and improves its service life. Attached Figure Description

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the connection between the roller and the snap-fit ​​pulley in this invention;

[0032] Figure 3 This is a top view of the invention during its initial operation;

[0033] Figure 4 This is a front view of the invention during its initial operation;

[0034] Figure 5 This is a top view of the invention at the point of initial operation;

[0035] Figure 6 This is a front view of the invention at the point of initial operation;

[0036] Figure 7 This is a schematic diagram of the connection between the pull rope clamp and the pressure handle in this invention;

[0037] Figure 8 This is a schematic diagram of the membrane clamping mechanism in this invention;

[0038] Figure 9 This is a schematic diagram of the snap-fit ​​pulley structure in this invention;

[0039] Figure 10 This is a schematic diagram of the structure of the left half of the wheel in this invention;

[0040] Figure 11 This is a schematic diagram of the right half of the wheel in this invention;

[0041] Figure 12 This is a front view of the snap-fit ​​pulley in this invention;

[0042] Figure 13 This is a cross-sectional view of the snap-fit ​​pulley in this invention.

[0043] In the diagram: 11. Front winding device; 12. End unwinding device; 13. Roller; 14. Film; 15. Water tank; 21. Pull rope; 22. Positioning pin; 23. Snap-on pulley; 3. Film clamping mechanism; 31. Pull rope clamp; 32. Pressure handle; 33. Clamping plate; 34. First locking bolt; 41. Position switch; 42. Tension sensor; 5. Left half wheel; 501. Right half wheel; 502. Rotating shaft; 503. Positioning port; 504. Connecting block; 505. Second locking bolt; 506. Inner connecting ring; 507. Outer connecting ring; 508. Half-rotating ring; 509. Ball bearing. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0045] Reference Figure 1-8 As shown, an automatic fabric feeding device for polarizing film includes a water tank 15 for soaking the film 14 and a roller 13 for conveying the film 14. It also includes: a traction mechanism: a front winding device 11, an end unwinding device 12, a positioning pin 22 and a snap-on pulley 23; a film clamping mechanism 3: a pull rope clamp 31, a pressure handle 32, a clamping plate 33 and a first locking bolt 34; and a control mechanism: a control module, a position switch 41 and a tension sensor 42.

[0046] It should be noted that the front winding device 11 and the end unwinding device 12 are respectively located at both ends of the water tank 15. Positioning pins 22 are fixedly connected to both ends of each roller 13. Clip-on pulleys 23 are detachably fixedly connected to both ends of each roller 13 via positioning pins 22. The front winding device 11 includes a winding core and a rotating shaft. Both ends of the rotating shaft are fitted with wire grooves, and pull ropes 21 are attached to the wire grooves. The other end of the pull rope 21 is connected to the film clamping mechanism 3. The two proximal ports of the pull rope clamp 31 are fixedly connected to the pressure handle 32. The pull rope 21 is inserted into the pull rope clamp 31 through the pressure handle 32. 2. The two clamping plates 33 are clamped together by the first locking bolt 34, wherein one end of the film 14 is clamped between the two clamping plates 33. The position switch 41 is located near the front winding device 11. When the film clamping mechanism 3 passes the front winding device 11, it is triggered and the control module controls the front winding device 11 and the end unwinding device 12 to stop synchronously. The tension sensor 42 is set on the roller 13 to detect the tension of the film 14 when it passes the roller 13. When the control module detects an increase in tension through the tension sensor 42, it controls the front winding device 11 to slow down to reduce the tension of the pull rope 21 and prevent the film 14 from breaking.

[0047] It should be noted that the upper and lower ends of the outer side of the pull rope clamp 31 are both rounded and pointed, so that the pull rope clamp 31 will not come off when it passes through the snap-on pulley 23 fixedly connected to the roller 13.

[0048] It should be noted that there are multiple rollers 13, and the multiple rollers 13 are at different heights.

[0049] It should be noted that, in addition, the reference Figure 9-13As shown, the snap-fit ​​pulley 23 includes a left half-wheel 5 and a right half-wheel 501. One end of the left half-wheel 5 is provided with an outer connecting ring 507, and the end of the right half-wheel 501 near the outer connecting ring 507 is provided with an inner connecting ring 506. The inner connecting ring 506 and the outer connecting ring 507 are rotatably connected via a rotating shaft 502. Connecting blocks 504 are fixedly connected to the front ends of both the left half-wheel 5 and the right half-wheel 501 near the ends furthest from the rotating shaft 502. The two connecting blocks 504 are detachably fixedly connected by a second locking bolt 505. A positioning port 503 is provided on the inner arc surface of the right half-wheel 501. 503 is engaged with the positioning pin 22 to limit the snap-fit ​​pulley 23. The inner sides of the left half wheel 5 and the right half wheel 501 are provided with rotation grooves, and the inside of the rotation grooves is provided with ball bearings 509. Both the left half wheel 5 and the right half wheel 501 are provided with semi-rotating rings 508 at the rotation grooves. The two sides of the semi-rotating rings 508 extend into the rotation grooves and contact the ball bearings 509. This arrangement makes the rotation of the semi-rotating rings 508 smoother, which in turn makes the sliding of the pull rope 21 and the pull rope clamp 31 from the outer surface of the semi-rotating rings 508 smoother, greatly improving the fabric threading efficiency of this device.

[0050] It should be noted that the outer diameter of the semi-rotating ring 508 is larger than the outer diameter of the roller 13, so that the film 14 can pass smoothly between the rollers 13 during the fabric feeding process and the film clamping mechanism 3 does not scrape against the rollers 13.

[0051] It should be noted that the control module, position switch 41, tension sensor 42, front winding device 11 and end unwinding device 12 are connected in terms of data.

[0052] The working principle of this device is explained through its usage method, including the following steps: Step 1: Install snap-on pulleys 23 at both ends of the roller 13 at the positioning pins 22, ensuring that the snap-on pulleys 23 on each side are in the same plane; Step 2: Attach one end of each of the two pull ropes 21 to the two grooves in the front winding device 11, and insert the other end of the pull ropes 21 into the pull rope clamps 31 through the gap between the pressure handles 32. Then, place the end of the film 14 between the two clamping plates 33, and finally, fix the film clamping mechanism 3 to the film 14 by tightening the first locking bolt 34; Step 3: Set the tension of the front winding device 11 through the control module. The front winding device 11 and the end unwinding device 12 move synchronously, pulling the pull ropes 21. Step 4: During the process of pulling the film 14 by the pulling rope 21, the tension sensor 42 monitors the tension in real time. When the tension on the take-up side increases due to the change in direction after the film 14 passes the snap-on pulley 23, the control module will control the front take-up device 11 and the end unwinding device 12 to decelerate synchronously. Step 5: When the film clamping mechanism 3 moves in front of the front take-up device 11, it will contact and trigger the position switch 41. The control module will control the front take-up device 11 and the end unwinding device 12 to stop synchronously, thus completing the fabric threading operation. Step 6: Disassemble the film clamping mechanism 3 and attach the film 14 to the take-up core for winding. Disassemble each snap-on pulley 23 to make room for production operations.

[0053] This invention, through the setup and collaboration of the traction mechanism, the film clamping mechanism 3, and the control mechanism, successfully achieves automated fabric threading operations. Compared to manual fabric threading, it greatly improves production efficiency, reduces the labor intensity of workers, and significantly enhances the safety of fabric threading operations. The snap-on pulley 23, due to its convenient installation and disassembly, improves the ease of use of the device and effectively avoids occupying production space. Furthermore, the control module utilizes the tension sensor 42 to detect an increase in tension and controls the front winding device 11 and the end unwinding device 12 to simultaneously reduce speed, quickly adjusting the tension of the pull rope 21 and improving the safety of the film 14 during the fabric threading process.

[0054] The present invention also utilizes the fact that the outer diameter of the semi-rotating ring 508 is larger than the outer diameter of the roller 13, so that when the pulling rope clamp 31 passes over the outer surface of the semi-rotating ring 508 during the fabric feeding process, the film 14 can pass smoothly between the rollers 13 and the film clamping mechanism 3 does not scrape against the rollers 13, which greatly reduces the wear rate of the device during use and improves the service life of the device.

[0055] This device does not require major modifications to the original production control system. It utilizes existing tension sensors, unwinding and rewinding servo motors, and does not change the original control principle. This makes the device cost-effective, easy to install, and has great application potential.

[0056] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An automatic fabric feeding device for polarizing film traction film, comprising a water tank (15) for soaking the film (14) and rollers (13) for conveying the film (14), characterized in that, Also includes: Traction mechanism: front winding device (11), end unwinding device (12), positioning pin (22) and snap-on pulley (23); Film clamping mechanism (3): pull rope clamp (31), pressure handle (32), clamping plate (33) and first locking bolt (34); Control mechanism: control module, position switch (41) and tension sensor (42); The front winding device (11) and the end unwinding device (12) are respectively set at both ends of the water tank (15). The positioning pin (22) is fixedly connected to both ends of each roller (13). The snap-on pulley (23) is detachably fixedly connected to both ends of each roller (13) through the positioning pin (22). The front winding device (11) includes a winding core and a rotating shaft. Both ends of the rotating shaft are fitted with wire grooves. A pull rope (21) is attached to the wire groove. The other end of the pull rope (21) is connected to the film clamping mechanism (3). The two near ports of the pull rope clamp (31) are fixedly connected to the pressure handle (32). The pull rope (21) is inserted into the pull rope clamp (31) through the pressure handle (32). The two clamping plates (33) are clamped by the first locking bolt (34), wherein one end of the film (14) is clamped between the two clamping plates (33). The position switch (41) is set near the front winding device (11). When the film clamping mechanism (3) passes the front winding device (11), it is triggered and the front winding device (11) and the end unwinding device (12) are controlled to stop synchronously by the control module. The tension sensor (42) is set on the roller (13) to detect the tension of the film (14) when it passes the roller (13). When the tension sensor (42) detects an increase in tension, the control module controls the front winding device (11) to slow down to reduce the tension of the pull rope (21) and prevent the film (14) from breaking. The upper and lower ends of the outer side of the pull rope clamp (31) are both rounded and pointed, so that the pull rope clamp (31) will not come off when it passes through the snap-on pulley (23) fixedly connected to the roller (13).

2. The automatic fabric feeding device for polarizing film traction film according to claim 1, characterized in that, Multiple rollers (13) are provided, and the multiple rollers (13) are at different heights.

3. The automatic fabric feeding device for polarizing film traction film according to claim 1, characterized in that, The snap-fit ​​pulley (23) includes a left half wheel (5) and a right half wheel (501). One end of the left half wheel (5) is provided with an outer connecting ring (507), and the end of the right half wheel (501) near the outer connecting ring (507) is provided with an inner connecting ring (506). The inner connecting ring (506) and the outer connecting ring (507) are rotatably connected by a rotating shaft (502). The front of the left half wheel (5) and the right half wheel (501) near the end away from the rotating shaft (502) are both fixedly connected with connecting blocks (504). The two connecting blocks (504) are detachably fixedly connected by a second locking bolt (505).

4. The automatic fabric feeding device for polarizing film traction film according to claim 3, characterized in that, The right half wheel (501) has a positioning port (503) on its inner arc surface. The positioning port (503) is engaged with the positioning pin (22) to limit the position of the snap-on pulley (23).

5. The automatic fabric feeding device for polarizing film traction film according to claim 4, characterized in that, The inner surfaces of the left half wheel (5) and the right half wheel (501) are provided with rotating grooves, and ball bearings (509) are provided inside the rotating grooves. Both the left half wheel (5) and the right half wheel (501) are provided with semi-rotating rings (508) at the rotating grooves. The two sides of the semi-rotating rings (508) extend into the rotating grooves, and the semi-rotating rings (508) and the ball bearings (509) are in contact.

6. The automatic fabric feeding device for polarizing film traction film according to claim 5, characterized in that, The outer diameter of the semi-rotating ring (508) is larger than the outer diameter of the roller (13), so that during the fabric feeding process, the film (14) can pass smoothly between the rollers (13) and the film clamping mechanism (3) does not scrape against the rollers (13).

7. The automatic fabric feeding device for polarizing film traction film according to claim 1, characterized in that, The control module, position switch (41), tension sensor (42), front winding device (11) and end unwinding device (12) are connected by data.

8. A method of using the automatic fabric threading device for polarizing film traction film according to claim 1, characterized in that, Includes the following steps: Step 1: Install snap-on pulleys (23) at both ends of the roller (13) at the positioning pins (22), requiring that the snap-on pulleys (23) on each side are located in the same plane; Step 2: Attach one end of the two pull ropes (21) to the two wire grooves in the front winding device (11), insert the other end of the pull rope (21) into the pull rope clamp (31) through the gap between the pressure handles (32), place the end of the film (14) between the two clamping plates (33), and finally fix the film clamping mechanism (3) and the film (14) by tightening the first locking bolt (34); Step 3: Set the tension of the front winding device (11) through the control module. The front winding device (11) and the end unwinding device (12) move synchronously, pulling the pull rope (21). The pull rope (21) pulls the film (14) forward synchronously through the film clamping mechanism (3). Step 4: During the process of the pull rope (21) pulling the film (14), the tension sensor (42) monitors the tension in real time. When it is measured that the tension on the film take-up side increases due to the change in direction when the film (14) passes the snap-on pulley (23), the control module will control the front winding device (11) and the end unwinding device (12) to decelerate synchronously. Step 5: When the film clamping mechanism (3) moves to the front of the front winding device (11), it will contact and trigger the position switch (41). The control module will control the front winding device (11) and the end unwinding device (12) to stop synchronously, thus completing the fabric threading operation. Step 6: Disassemble the film clamping mechanism (3), attach the film (14) to the winding core for winding, remove each snap-on pulley (23) to make room for production operations.

Images