A polarizing plate processing apparatus

Abstract

The utility model discloses a polarizing plate processing equipment including compound device and warping adjusting device, compound device includes upper pressure roller and lower pressure roller, and the upper pressure roller is installed at the top of lower pressure roller, and the line of the center of upper pressure roller and the center of lower pressure roller is in vertical direction, warping adjusting device includes the always keeping level and can be along the vertical direction up and down movement and can stay on the preset height automatic realization position locking adjusting roller, and the polarizing plate of compound through upper pressure roller and lower pressure roller, around to the lower of adjusting roller and closely adjusting roller, and the polarizing plate after leaving adjusting roller is hauled to the above of adjusting roller, and adjusting roller exerts pressure to the polarizing plate, and the up and down movement adjusting roller improves the warping of polarizing plate, the utility model discloses a polarizing plate processing equipment can effectively solve the warping exception of polarizing plate.

Description

Technical Field

[0001] This utility model relates to the field of polarizer processing technology, and in particular to a polarizer processing equipment. Background Technology

[0002] With the continuous development of the mobile phone, computer, and digital industries, the demand for polarizing films is increasing. The production process of polarizing films is also a multi-layer film lamination process. The film materials and adhesives used are mainly TAC, PVA, PET protective film, release film, PSA pressure-sensitive adhesive, etc., and the structure of the finished product is as follows: Figure 1 As shown. Polarizing films are produced in roll form during the manufacturing process. There is a certain interlayer stress during the film lamination process, and there are differences in the water absorption, heat shrinkage, tensile elongation, and thickness of the upper and lower TAC materials. This makes it difficult to control the warping of the polarizing film after lamination and drying. After the protective film and release film are laminated, the polarizing film is basically formed and then directly cut. If the warping of the formed roll cannot be adjusted or the original warping degree cannot be guaranteed, it will cause the customer to be unable to install the film, resulting in batch returns. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the difficulty of improving the warping defect of existing polarizer processing equipment, and to propose a polarizer processing equipment that can solve the problem of abnormal warping of existing polarizers.

[0004] To solve the above problems, this utility model proposes the following technical solution: a polarizer processing equipment includes a composite device and a warpage adjustment device;

[0005] The composite device includes an upper pressure roller and a lower pressure roller. The upper pressure roller is installed above the lower pressure roller, and the line connecting the center of the upper pressure roller and the center of the lower pressure roller is in the vertical direction.

[0006] The warpage adjustment device includes an adjustment roller that always remains horizontal, can move up and down in the vertical direction, and can automatically lock its position at a preset height.

[0007] The polarizer, which is composited by the upper and lower pressure rollers, wraps around the underside of the adjusting roller and is close to it. After leaving the adjusting roller, the polarizer is pulled to the top of the adjusting roller. The adjusting roller applies pressure to the polarizer, and moving the adjusting roller up and down improves the warping of the polarizer.

[0008] A further limitation of the above technical solution is that the center position refers to the horizontal extension of the intersection point of the line connecting the center of the upper pressure roller and the center of the lower pressure roller with the polarizer sandwiched between the upper and lower pressure rollers; the adjusting roller can move upward to a position higher than the center position and downward to a position lower than the center position.

[0009] A further limitation of the above technical solution is that the warp adjustment device also includes a frame; the frame includes two support frames arranged parallel to each other in the vertical direction, two slide rails installed and fixed in parallel to each other in the vertical direction on the opposite side walls of the two support frames, and two sliders installed on the two slide rails and capable of sliding up and down along the two slide rails in the vertical direction.

[0010] The two ends of the adjusting roller are respectively mounted and fixed on two sliders, and can move up and down along the vertical direction with the two sliders.

[0011] A further limitation of the above technical solution is that the warp adjustment device also includes a drive mechanism; the drive mechanism includes two drive motors respectively mounted and fixed on the top of the two support frames, two lead screws mounted vertically on the two support frames, two connecting blocks respectively mounted on the two lead screws and threadedly connected to the two lead screws, and a synchronizing rod connected between the two drive motors;

[0012] The top ends of the two lead screws are respectively connected to the rotating shafts of two drive motors;

[0013] The two connecting blocks are respectively installed and fixed on the two sliders;

[0014] The synchronizing rod ensures that the two lead screws rotate synchronously, so that the two ends of the adjusting roller can maintain the same height during the up and down movement, and the adjusting roller is always kept horizontally mounted on the frame.

[0015] The further limitation of the above technical solution is that the number of lead screws is changed to one, and the number of drive motors is changed to one.

[0016] The further limitation of the above technical solution is that it is changed to one drive motor driving two lead screws to rotate simultaneously.

[0017] A further limitation of the above technical solution is that the drive motor is changed to a servo motor or a stepper motor.

[0018] A further limitation of the above technical solution is that the polarizer processing equipment also includes a first unwinding device and a second unwinding device;

[0019] The release film of the polarizer is drawn out from the first unwinding device, a pressure-sensitive adhesive is first coated on its surface, and then it moves towards the laminating device. The polarizing protective film of the polarizer is drawn out from the second unwinding device and moves towards the laminating device, where it is laminated between the upper and lower pressure rollers to form a polarizer; or

[0020] The protective film of the polarizer is pulled out from the first unwinding device, pressure-sensitive adhesive is first coated on its surface, and then it moves towards the laminating device. The polarizing release film of the polarizer is pulled out from the second unwinding device and moves towards the laminating device. The polarizer is then laminated between the upper pressure roller and the lower pressure roller to form a polarizer.

[0021] A further limitation of the above technical solution is that the polarizer processing equipment also includes a polarizer winding device capable of winding up the composited and warped polarizer.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The warpage adjustment device added to the polarizer processing equipment of this utility model includes an adjustment roller that always remains horizontal and can move up and down along the vertical direction and can automatically lock its position at a preset height. The height of the adjustment roller can be higher than, equal to or lower than the height of the center position. The adjustment roller always maintains pressure on the polarizer. By adjusting the height of the adjustment roller, the exit angle between the composite polarizer and the upper and lower pressure rollers can be adjusted, thereby improving the stress between the polarizer film layers and solving the positive and negative warpage problems of the polarizer.

[0024] 2. The polarizer processing equipment of this utility model can produce polarizers with normal warpage. The warpage adjustment device has a simple structure and is easy to use. It can realize the automated continuous composite, warpage correction and winding operations of polarizers. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0026] Figure 1 This is a schematic diagram of the structure of a finished polarizer.

[0027] Figure 2 This is a schematic diagram of the structure of the polarizer processing equipment of this utility model.

[0028] Figure 3 This is a structural diagram of the warp adjustment device of this utility model.

[0029] Figure 4 This is a schematic diagram illustrating the improvement of positive warping in the polarizer processing equipment of this utility model.

[0030] Figure 5 This is a schematic diagram illustrating the improvement of negative warping in the polarizer processing equipment of this utility model.

[0031] Figure 6 This is a schematic diagram illustrating the improvement of positive warping in the polarizer processing equipment of this utility model.

[0032] Figure 7 This is a schematic diagram illustrating the improvement of negative warping in the polarizer processing equipment of this utility model. Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1 As shown, the polarizer 100 includes a polarizing film 1, a release film 2, a first pressure-sensitive adhesive layer 3, a protective film 4, and a second pressure-sensitive adhesive layer (not shown).

[0035] The polarizing film 1 includes a PVA (polyvinyl alcohol) layer 10 and two TAC (tri-cellulose acetate) layers 11 located on the upper and lower sides of the PVA layer 10, respectively.

[0036] Release film 2 is located below the lower TAC layer 11 of polarizing film 1.

[0037] The first pressure-sensitive adhesive layer 3 is located between the polarizing film 1 and the release film 2, and is used to firmly bond the polarizing film 1 and the release film 2.

[0038] The protective film 4 is located on the upper side of the TAC layer 11, which is the uppermost layer of the polarizing film 1.

[0039] The second pressure-sensitive adhesive layer (not shown) is located between the polarizing film 1 and the protective film 4, and is used to firmly bond the polarizing film 1 and the protective film 4.

[0040] The production process of polarizer 100 is a multilayer film lamination process. In the conventional preparation process, the last step is to perform lamination. After lamination is completed, the film is rolled up to become the finished polarizer 100 roll.

[0041] like Figures 2 to 5 As shown, the polarizing film processing equipment of this utility model is introduced by taking the already bonded polarizing film 1 and protective film 4 (referred to as: polarizing protective film 14) as one party and release film 2 as the other party for composite processing.

[0042] The polarizer processing equipment includes a first unwinding device 20, a second unwinding device 21, a composite device 22 for laminating the polarizer protective film 14 and the release film 2, a warpage adjustment device 24, and a polarizer winding device 25.

[0043] Release film 2 is pulled out from the first unwinding device 20, pressure-sensitive adhesive is first coated on the surface of release film 2, and then it moves towards the composite device 22.

[0044] The polarizing protective film 14 is pulled out from the second unwinding device 21 and moves towards the composite device 22.

[0045] The composite device 22 includes an upper pressure roller 221 and a lower pressure roller 223.

[0046] The upper pressure roller 221 is installed above the lower pressure roller 223, and the line connecting the center of the upper pressure roller 221 and the center of the lower pressure roller 223 is in the vertical direction.

[0047] Release film 2, coated with pressure-sensitive adhesive, comes from above the upper pressure roller 221 and then wraps around to the bottom of the upper pressure roller 221. Polarizing protective film 14 comes from below the lower pressure roller 223 and then wraps around to the top of the lower pressure roller 223. Polarizing protective film 14 and release film 2 are attached together and enter between the upper pressure roller 221 and the lower pressure roller 223, where they are pressed together. The pressure-sensitive adhesive in between tightly bonds polarizing protective film 14 and release film 2 together to form polarizing film 100.

[0048] The warpage adjustment device 24 includes a frame 241, an adjustment roller 242, and a drive mechanism 243.

[0049] The frame 241 includes two support frames 2411 arranged parallel to each other in the vertical direction, two slide rails 2412 mounted and fixed parallel to each other in the vertical direction on the opposite side walls of the two support frames 2411, and two sliders 2413 mounted on the two slide rails 2412 and capable of sliding up and down along the two slide rails 2412 in the vertical direction.

[0050] The two ends of the adjusting roller 242 are respectively mounted and fixed on two sliders 2413, and can move up and down along the vertical direction with the two sliders 2413.

[0051] The drive mechanism 243 includes two drive motors 2431 respectively mounted and fixed on the top of two support frames 2411, two lead screws 2432 mounted vertically on the two support frames 2411, two connecting blocks 2433 respectively mounted on the two lead screws 2432 and threadedly connected to the two lead screws 2432, and a synchronizing rod 2434 connected between the two drive motors 2431.

[0052] The top ends of the two lead screws 2432 are respectively connected to the rotating shafts of the two drive motors 2431.

[0053] Two connecting blocks 2433 are respectively installed and fixed on two sliders 2413.

[0054] When the two drive motors 2431 are started, they drive the two lead screws 2432 to rotate. The rotation of the two lead screws 2432 causes the two connecting blocks 2433, the two sliders 2413 and the adjusting rollers 242 to move up and down in the vertical direction.

[0055] Synchronizing rod 2434 ensures that the two lead screws 2432 rotate synchronously, so that the two ends of the adjusting roller 242 can maintain the same height during the up and down movement, so that the adjusting roller 242 is always horizontally mounted on the frame 241, and the adjusting roller 242 and the warping adjustment device 24 can be used normally.

[0056] The lead screw 2432 and drive motor 2431 act as driving components to control the slider 2413 to move up and down along the slide rail 2412, thereby driving the adjusting roller 242 connected to the slider 2413 to move up and down vertically. After the lead screw 2432 stops rotating, the connecting block 2433, slider 2413, and adjusting roller 242 stop at a preset height and automatically lock in position. The lead screw 2432 and drive motor 2431 work together to achieve high position adjustment accuracy and good locking effect. In addition, the structure of the slide rail 2412 and slider 2413 is used to install and fix the adjusting roller 242, which can reduce the stress on the lead screw 2432, prevent the lead screw 2432 from deforming, and prevent the adjusting roller 242 from falling off the frame 241 during sliding, thereby ensuring the reliability of the warp adjustment device 24.

[0057] The polarizer 100, which is composited by the upper pressure roller 221 and the lower pressure roller 223, is wound around the underside of the adjusting roller 242 and closely adheres to it. It is then pulled above the adjusting roller 242 and enters the polarizer winding device 25. It is important to note that regardless of the new position reached by the adjusting roller 242 (whether it is moved up or down), the polarizer 100 after leaving the adjusting roller 242 is always pulled above it. This ensures that the adjusting roller 242 maintains a certain pressure on the polarizer 100 below, facilitating the reduction of warpage in the polarizer 100.

[0058] Here, "center position" is defined as the horizontal extension of the line connecting the center of the upper pressure roller 221 and the center of the lower pressure roller 223 and the polarizer 100 sandwiched between the upper pressure roller 221 and the lower pressure roller 223. Figure 4 and Figure 5 The straight line A shown is the center position.

[0059] The warpage adjustment device 24 improves the warpage of the polarizer 100 by adjusting the exit angle between the composite polarizer 100 and the upper pressure roller 221 and lower pressure roller 223. The specific principle is based on the fact that the film materials used in the multilayer polarizer film have certain deformation properties, especially between the protective film 4 and the polarizing film 1, and between the release film 2 and the polarizing film 1, because the multilayer film is bonded with adhesive, which creates a certain stress. When the polarizer 100 exhibits positive warpage (positive warpage refers to warping from the release film 2 towards the polarizing film 1 and the protective film 4), a reverse force needs to be applied to bend it towards the release film 2. This force originates from the angle between the composite polarizer 100 and the uncomposite polarizing protective film 14 (see...). Figure 4 The larger the angle, the more fully the upper pressure roller 221 wraps around the polarizer 100, the greater the applied reverse force, and the more fully the polarizer 100 is rolled in the reverse direction, resulting in a greater degree of correction of warping. For example... Figure 4As shown, when polarizing film 1 exhibits positive warping, it is necessary to move adjusting roller 242 upwards, or even make the height of adjusting roller 242 higher than the height of center position A. After composite polarizing film 100 is adjusted upwards, positive warping can be improved.

[0060] When the polarizer 100 exhibits negative warping (negative warping refers to warping from the protective film 4 and polarizer 1 towards the release film 2), a reverse force needs to be applied to bend it towards the polarizer protective film 14. This force originates from the angle between the composite polarizer 100 and the uncomposite polarizer protective film 14 (see...). Figure 5 The smaller the angle, the more fully the pressure roller 223 wraps around the polarizer 100, the greater the applied reverse force, and the more fully the polarizer 100 is rolled in the reverse direction, resulting in a greater degree of correction of negative warping. For example... Figure 5 As shown, when the polarizing film 1 exhibits negative warping, the adjusting roller 242 needs to be moved downwards, even to the point that the height of the adjusting roller 242 is lower than the height of the center position A. After the composite polarizing film 100 is adjusted downwards, the negative warping can be improved.

[0061] The polarizer winding device 25 is capable of winding up the composite polarizer 100, whose warpage has been improved.

[0062] During the processing, the first unwinding device 20 and the second unwinding device 21 simultaneously unwind the release film 2 coated with pressure-sensitive adhesive and the polarizing protective film 14, and send the release film 2 and the polarizing protective film 14 together into the laminating device 22 for lamination. After lamination, the polarizing film 100 is sent to the warp adjustment device 24 for warp correction (as mentioned above, the adjusting roller 242 is moved up and down to improve positive or negative warp). Then, the polarizing film winding device 25 is used to wind up the finished polarizing film 100 after lamination and warp correction.

[0063] The present invention has the following beneficial effects: The polarizer processing equipment of the present invention is equipped with a warpage adjustment device 24. The height of the adjustment roller 242 in the vertical direction can be adjusted by simply moving the adjustment roller 242 up and down, which can effectively improve positive or negative warpage and produce a polarizer 100 with normal warpage. The structure is simple and easy to use, and it can realize the automated continuous composite, warpage correction and winding operation of polarizer 100.

[0064] The above embodiment illustrates the polarizing film processing equipment of this invention by using a pre-bonded polarizing film 1 and protective film 4 (referred to as: polarizing protective film 14) as one party and release film 2 as the other party for lamination. In another embodiment, this equipment can use a pre-bonded polarizing film 1 and release film 2 (referred to as: polarizing release film 12) as one party and protective film 4 as the other party for lamination. The protective film 4 is unwound from the first unwinding device 20, and the polarizing release film 12 is unwound from the second unwinding device 21. They are laminated in the lamination device 22 and then enter the warpage adjustment device 24. Unlike the above embodiment, the up-and-down movement direction of the adjustment roller 242 is reversed. Figure 6 As shown, when polarizer 100 exhibits positive warping, the adjusting roller 242 needs to be moved downwards, even to the point where its height is lower than the height of center position A. After compounding, the polarizer 100 is adjusted downwards to improve the positive warping. Figure 7 As shown, when the polarizer 100 exhibits negative warping, the adjusting roller 242 needs to be moved upwards, or even made so that the height of the adjusting roller 242 is higher than the height of the center position A. After the composite polarizer 100 is adjusted upwards, the negative warping can be improved.

[0065] In the two embodiments described above, the release film 2 or protective film 4 enters the laminating device 22 from above, and the polarizing protective film 14 or polarizing release film 12 enters the laminating device 22 from below. In fact, the positions can be interchanged, that is, the release film 2 or protective film 4 enters the laminating device 22 from below, while the polarizing protective film 14 or polarizing release film 12 enters the laminating device 22 from above. By simply adjusting the moving direction of the adjusting roller 242 accordingly, positive warping and negative warping can be improved in the same way.

[0066] In another embodiment, the number of lead screws 2432 is changed to one, and the number of drive motors 2431 is changed to one.

[0067] In another embodiment, a single drive motor 2431 drives two lead screws 2432 to rotate simultaneously.

[0068] In another embodiment, the drive motor 2431 is replaced with a servo motor. Servo motors have high precision, stable operation, and strong overload resistance. Using a servo motor to drive the adjusting roller 242 to move up and down can improve the position adjustment accuracy of the adjusting roller 242.

[0069] In another embodiment, the drive motor 2431 is replaced with a stepper motor.

[0070] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A polarizer processing equipment, characterized in that, It includes a composite device (22) and a warp adjustment device (24); The composite device (22) includes an upper pressure roller (221) and a lower pressure roller (223). The upper pressure roller (221) is installed above the lower pressure roller (223), and the line connecting the center of the upper pressure roller (221) and the center of the lower pressure roller (223) is in the vertical direction. The warping adjustment device (24) includes an adjustment roller (242) that always remains horizontal and can move up and down in the vertical direction and can automatically lock its position at a preset height. The polarizer (100) is composited by the upper pressure roller (221) and the lower pressure roller (223), and then wraps around the underside of the adjusting roller (242) and is close to the adjusting roller (242). After leaving the adjusting roller (242), the polarizer (100) is pulled above the adjusting roller (242). The adjusting roller (242) applies pressure to the polarizer (100), and the adjusting roller (242) moves up and down to improve the warping of the polarizer.

2. The polarizer processing equipment according to claim 1, characterized in that, The center position refers to the horizontal extension of the line connecting the center of the upper pressure roller (221) and the center of the lower pressure roller (223) with the polarizer (100) sandwiched between the upper pressure roller (221) and the lower pressure roller (223); the adjusting roller (242) can move upward to a position higher than the center position and downward to a position lower than the center position.

3. The polarizer processing equipment according to claim 1, characterized in that, The warping adjustment device (24) also includes a frame (241); the frame (241) includes two support frames (2411) arranged parallel to each other in the vertical direction, two slide rails (2412) installed and fixed in parallel to each other in the vertical direction on the opposite side walls of the two support frames (2411), and two sliders (2413) installed on the two slide rails (2412) and capable of sliding up and down along the two slide rails (2412) in the vertical direction. The two ends of the adjusting roller (242) are respectively mounted and fixed on two sliders (2413), and can move up and down along the vertical direction with the two sliders (2413).

4. The polarizer processing equipment according to claim 3, characterized in that, The warp adjustment device (24) also includes a drive mechanism (243); the drive mechanism (243) includes two drive motors (2431) respectively mounted and fixed on the top of two support frames (2411), two lead screws (2432) mounted vertically on the two support frames (2411), two connecting blocks (2433) respectively mounted on the two lead screws (2432) and threadedly connected to the two lead screws (2432), and a synchronizing rod (2434) connected between the two drive motors (2431). The top ends of the two lead screws (2432) are respectively connected to the rotating shafts of two drive motors (2431); Two connecting blocks (2433) are respectively installed and fixed on two sliders (2413); The synchronizing rod (2434) ensures that the two lead screws (2432) rotate synchronously, so that the two ends of the adjusting roller (242) can maintain the same height during the up and down movement, so that the adjusting roller (242) is always horizontally mounted on the frame (241).

5. The polarizer processing equipment according to claim 4, characterized in that, The number of lead screws (2432) is changed to one, and the number of drive motors (2431) is changed to one.

6. The polarizer processing equipment according to claim 4, characterized in that, Instead, a single drive motor (2431) was used to drive two lead screws (2432) to rotate simultaneously.

7. The polarizer processing equipment according to claim 4, characterized in that, Replace the drive motor (2431) with a servo motor or a stepper motor.

8. The polarizer processing equipment according to claim 1, characterized in that, The polarizer processing equipment also includes a first unwinding device (20) and a second unwinding device (21); The release film (2) of the polarizer (100) is pulled out from the first unwinding device (20), pressure-sensitive adhesive is first coated on its surface, and then it moves towards the laminating device (22). The polarizing protective film (14) of the polarizer (100) is pulled out from the second unwinding device (21) and moves towards the laminating device (22), where it is laminated between the upper pressure roller (221) and the lower pressure roller (223) to form the polarizer (100); or The protective film (4) of the polarizer (100) is pulled out from the first unwinding device (20), pressure-sensitive adhesive is first coated on the surface, and then it moves towards the composite device (22). The polarizing release film (12) of the polarizer (100) is pulled out from the second unwinding device (21) and moves towards the composite device (22). The polarizer (100) is then composited between the upper pressure roller (221) and the lower pressure roller (223) to form the polarizer (100).

9. The polarizer processing equipment according to claim 1, characterized in that, The polarizer processing equipment also includes a polarizer winding device (25) capable of winding up a composite polarizer (100) with improved warping.

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