An apparatus for preparing ultrathin polarizers

Abstract

This invention discloses an ultra-thin polarizer manufacturing apparatus, relating to the field of polarizer production technology. It includes a driving assembly and a control assembly. The driving assembly includes a cylinder, a top seat, a support rod, a first piston head, a movable rod, and a fixed block. A first air inlet pipe is provided at the top of the cylinder. The first piston head is slidably connected to the inner wall of the cylinder. One end of the movable rod is fixedly connected to the first piston head, and the movable rod is slidably connected to the cylinder. The other end of the movable rod is fixedly connected to the top seat, and the top seat is hinged to one end of the support rod. This apparatus allows for the release of tensile stress after each stretching of the PVA film, avoiding uneven stretching that occurs when stretching to the bottom in one go, reducing PVA film breakage, and improving yield. Releasing tensile stress before further stretching helps to fully extend the length of the PVA film, increasing its stretching ratio and making it thinner, thus manufacturing thinner polarizers suitable for flexible displays with high bending requirements.

Description

Technical Field

[0001] This invention relates to the field of polarizer production technology, and in particular to an apparatus for preparing ultrathin polarizers. Background Art

[0002] The basic structure of a TV polarizer includes: a central layer of PVA (polyvinyl alcohol), two layers of TAC (cellulose triacetate), a PSA film (pressure-sensitive adhesive), a release film, and a protective film. The PVA film is responsible for polarization, forming a liquid crystal sheet with a total thickness of about 1 mm. Polarizer production technology is divided into two main categories based on the stretching process of the PVA film: dry process and wet process. The dry process refers to stretching the PVA film in a steam environment with specific temperature and humidity conditions, while the wet process refers to wet stretching the PVA film in a boric acid solution or an iodine solution.

[0003] Currently, application publication number CN 112698521 A discloses a stretching device for polarizing film and a manufacturing method for polarizing film. This stretching device realizes the transverse stretching of polarizing film in solution, which belongs to wet stretching. However, its stretching process is a one-time stretching forming, and the PVA film is subjected to large tensile stress, which easily leads to uneven stretching and PVA film cracking. Moreover, in the existing method, the stretching ratio of PVA film is small, and the length of PVA film is not fully extended, resulting in a thicker PVA film. Therefore, the thickness of the prepared polarizing film will also increase accordingly. For flexible displays with high bending requirements, thinner polarizing films are often required. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that in the existing manufacturing process, the stretching process is usually a one-time stretching process, which causes the PVA film to be subjected to large tensile stress, making it easy to have uneven stretching and causing the PVA film to break. Moreover, in the existing method, the stretching ratio of the PVA film is small, and the length of the PVA film is not fully extended, resulting in a thicker PVA film. Consequently, the thickness of the prepared polarizer will also increase accordingly. However, for flexible displays with high bending requirements, thinner polarizers are often needed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an ultra-thin polarizer preparation device, comprising a driving assembly, the driving assembly including a cylinder, a top seat, a support rod, a first piston head, a movable rod, and a first fixed block; a first air inlet pipe is provided at the top of the cylinder; the first piston head is slidably connected to the inner wall of the cylinder; one end of the first piston head is fixedly connected to the movable rod; the movable rod is slidably connected to the cylinder; and the other end of the movable rod is fixedly connected to the top seat; the top seat is hingedly connected to one end of the support rod; and the other end of the support rod is hingedly connected to the first fixed block; a control assembly, the control assembly... The components include a fixed tube, a movable tube, a movable plate, a first spring, and a baffle. The fixed tube is fixedly connected to the cylinder and slidably connected to the movable tube. The movable tube has a through hole. One end of the movable tube is fixedly connected to the baffle, and the outer wall of the other end of the movable tube is fixedly connected to the movable plate. One end of the movable plate is fixedly connected to the first spring, and the other end of the first spring is fixedly connected to the inner wall of the fixed tube. The clamping assembly includes a movable seat, a fixed seat, and a limiting rod. A first fixing block is fixedly connected to the upper surface of the fixed seat, and the two ends of the fixed seat are fixedly connected to the limiting rod, which is slidably connected to the movable seat.

[0006] As a preferred embodiment of the ultrathin polarizer preparation device of the present invention, wherein: one end of the guide tube is fixedly connected to the bottom of the cylinder, the other end of the guide tube is fixedly connected to the first telescopic rod, the top of the first telescopic rod is fixedly connected to the lower surface of the second fixed block, the upper surface of the second fixed block is fixedly connected to the card block, and the movable tube is provided with a card slot corresponding to the card block.

[0007] In a preferred embodiment of the ultrathin polarizer preparation device of the present invention, the bottom of the cylinder is fixedly connected to a base plate, the base plate is fixedly connected to the lower surface of the support seat, the upper surface of the base plate is fixedly connected to the bottom of the first telescopic rod, a second spring is sleeved on the first telescopic rod, the bottom of the second spring is fixedly connected to the support seat, and the top of the second spring is fixedly connected to the second fixing block.

[0008] In a preferred embodiment of the ultrathin polarizer preparation device of the present invention, the clamping assembly further includes a rubber block, and the movable seat and the fixed seat are respectively fixedly connected to the rubber block on their relatively close sides.

[0009] In a preferred embodiment of the ultrathin polarizer fabrication apparatus of the present invention, the clamping assembly further includes a movable component, which includes a first clamping rod, a second clamping rod, a first slider, and a mandrel. One end of the first clamping rod and the second clamping rod are respectively hinged to the lower surface of the fixed seat, and the other end of the first clamping rod and the second clamping rod are hinged to the first slider. The first slider is slidably connected to the inner wall of the first slide groove, which is located at the top of the movable seat. The first clamping rod is provided with a first through groove, and the second clamping rod is provided with a second through groove. The first clamping rod and the second clamping rod are arranged crosswise. The mandrel is slidably connected to the inner walls of the first through groove and the second through groove.

[0010] In a preferred embodiment of the ultra-thin polarizer preparation device of the present invention, the clamping assembly further includes a second telescopic rod, the second telescopic rod includes a fixed cylinder and a movable cylinder, the fixed cylinder is fixedly connected to a fixed seat, the inner wall of the fixed cylinder is slidably connected to the outer wall of the movable cylinder, and the outer wall of the movable cylinder is fixedly connected to a mandrel.

[0011] In a preferred embodiment of the ultrathin polarizer preparation device of the present invention, the fixed base has a cavity inside, the cavity is connected to the outside through a second air inlet pipe, a second piston head is slidably connected to the inner wall of the cavity, the second piston head is fixedly connected to a toothed plate, the toothed plate is meshed with a worm gear, one end of the worm gear is rotatably connected to a sleeve, the sleeve is fixedly connected to the inner wall of the cavity, the other end of the worm gear is provided with a thread, and the other end of the worm gear is threaded to the inner wall of the movable cylinder.

[0012] In a preferred embodiment of the ultrathin polarizer preparation device of the present invention, a limiting block is fixedly connected to the toothed plate, and the limiting block is slidably connected to the inner wall of the cavity.

[0013] As a preferred embodiment of the ultra-thin polarizer preparation device of the present invention, the clamping assembly further includes a second slider and a second slide groove. A limiting rod is fixedly connected to one side of the second slider, and the inner wall of the second slide groove is slidably connected to the other side of the second slider. A base plate is fixedly connected to the outer wall of the second slide groove.

[0014] In a preferred embodiment of the ultrathin polarizer preparation device of the present invention, a limiting ring is fixedly connected to the inner wall of the fixed tube.

[0015] The beneficial effects of this invention are: it can release tensile stress on the PVA film after each stretching, which can avoid uneven stretching that occurs when stretching to the end in one go, reduce the breakage of the PVA film, and improve the yield. Releasing tensile stress and then stretching again is beneficial to fully extend the length of the PVA film, increase the stretching ratio of the PVA film, and make the PVA film thinner, thereby manufacturing thinner polarizers, which are suitable for flexible displays with high bending requirements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this disclosure.

[0017] Figure 2 This is a schematic diagram of the drive component and control component structure in the embodiments of this disclosure.

[0018] Figure 3 This is a cross-sectional view of the drive component and control component in the embodiments of this disclosure.

[0019] Figure 4 For the embodiments of this disclosure Figure 3 Enlarged diagram of point A in the diagram.

[0020] Figure 5 This is a schematic diagram of the clamping component structure in an embodiment of this disclosure.

[0021] Figure 6 This is a schematic diagram of the movable seat and fixed seat structure in an embodiment of this disclosure.

[0022] Figure 7 For the embodiments of this disclosure Figure 6 Enlarged diagram of point B in the image.

[0023] Figure 8 This is a cross-sectional view of the fixed base in an embodiment of this disclosure.

[0024] Figure 9 For the embodiments of this disclosure Figure 8 Enlarged diagram of point C in the image.

[0025] Figure 10 For the embodiments of this disclosure Figure 8 Enlarged diagram of point D in the diagram.

[0026] Reference numerals: Drive assembly 100, cylinder 101, first intake pipe 101a, guide pipe 101b, top seat 102, support rod 103, first piston head 104, movable rod 105, first fixed block 106, first telescopic rod 107, second spring 107a, second fixed block 108, locking block 108a, base plate 109, support seat 109a, control assembly 200, fixed pipe 201, limit ring 201a, movable pipe 202, through hole 202a, slot 202b, movable plate 203, first spring 204, baffle 205, clamping assembly 3 00, movable seat 301, fixed seat 302, cavity 302a, second air inlet pipe 302b, second piston head 302c, toothed plate 302d, limiting block 302d-1, worm gear 302e, sleeve 302f, limiting rod 303, rubber block 304, movable part 305, first clamping rod 305a, first through groove 305a-1, second clamping rod 305b, second through groove 305b-1, first slider 305c, spindle 305d, second telescopic rod 306, fixed cylinder 306a, movable cylinder 306d, second slider 307, second slide groove 308. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Reference Figures 1 to 5This embodiment provides an ultrathin polarizer fabrication apparatus, including a drive assembly 100, a control assembly 200, and a clamping assembly 300. The drive assembly 100 includes a cylinder 101, a top seat 102, a support rod 103, a first piston head 104, a movable rod 105, and a first fixing block 106. A first air inlet pipe 101a is provided at the top of the cylinder 101. The first piston head 104 is slidably connected to the inner wall of the cylinder 101. One end of the first piston head 104 is fixedly connected to the first piston head 104. The movable rod 105 is slidably connected to the cylinder 101, and the other end of the movable rod 105 is fixedly connected to the top seat 102. The top seat 102 is hingedly connected to one end of the support rod 103, and the other end of the support rod 103 is hingedly connected to the first fixing block 106.

[0030] In this preferred embodiment, two sets of support rods 103 are symmetrically arranged on the lower surface of the top seat 102 on both sides of the movable rod 105. After connecting the existing air pump to the first air intake pipe 101a, the air pump pumps air into the cylinder 101 through the first air intake pipe 101a. The air pressure pushes the first piston head 104 to slide on the inner wall of the cylinder 101. When the first piston head 104 slides, it drives the movable rod 105 to extend and retract. When the movable rod 105 extends and retracts, it drives the top seat 102 to move. The top seat 102 drives the first fixed block 106 to move through the support rod 103.

[0031] The control component 200 includes a fixed tube 201, a movable tube 202, a movable plate 203, a first spring 204, and a baffle 205. The fixed tube 201 is fixedly connected to the cylinder 101 and slidably connected to the movable tube 202. The movable tube 202 is provided with a through hole 202a. One end of the movable tube 202 is fixedly connected to the baffle 205, and the outer wall of the other end of the movable tube 202 is fixedly connected to the movable plate 203. The movable plate 203 is fixedly connected to one end of the first spring 204, and the other end of the first spring 204 is fixedly connected to the inner wall of the fixed tube 201.

[0032] In this preferred embodiment, the air inside the cylinder 101 can enter the fixed tube 201 and the movable tube 202, and the movable plate 203 can slide inside the movable tube 202.

[0033] The clamping assembly 300 includes a movable seat 301, a fixed seat 302, and a limiting rod 303. The upper surface of the fixed seat 302 is fixedly connected to a first fixing block 106, and the two ends of the fixed seat 302 are fixedly connected to the limiting rod 303. The limiting rod 303 is slidably connected to the movable seat 301.

[0034] In this preferred embodiment, when the first fixing block 106 moves, it can drive the fixing seat 302 to move. When the fixing seat 302 moves, it can drive the movable seat 301 to move through the limiting rod 303. The movable seat 301 can slide on the limiting rod 303. When the movable seat 301 moves towards the fixing seat 302, it can cooperate with the fixing seat 302 to clamp the PVA film.

[0035] In use, the movable seat 301 can be moved closer to the fixed seat 302 by the existing cylinder. The movable seat 301 and the fixed seat 302 cooperate to clamp the PVA membrane. After connecting the existing air pump to the first air inlet pipe 101a, the air pump pumps air into the cylinder 101 through the first air inlet pipe 101a. Figure 3 When the air pressure above the first piston head 104 inside the cylinder 101 is greater than the air pressure below it, the first piston head 104 slides downward on the inner wall of the cylinder 101. The first piston head 104 drives the movable rod 105 to retract into the cylinder 101. At this time, the movable rod 105 retracts, driving the top seat 102 to move closer to the cylinder 101. The top seat 102 drives the first fixed block 106 to move away from each other through the support rod 103. At this time, the PVA film on the clamping device fixed to the bottom of the first fixed block 106 can be stretched for the first time.

[0036] At this time, the air pump continues to pump air in. When the air pressure above the first piston head 104 inside the cylinder 101 is greater than the elastic force of the first spring 204, the movable tube 202, movable plate 203 and baffle 205 overcome the elastic force of the first spring 204 and slide outward until the through hole 202a exposes the fixed tube 201. Then the air pump stops pumping air in, and the air pressure above the first piston head 104 inside the cylinder 101 escapes and decreases until the air pressure below the first piston head 104 is greater than the air pressure above the first piston head 104. Then the first piston head 104 moves upward, and the first piston head 104 drives the movable rod 105 to move upward. The movable rod 105 drives the top seat 102 to move upward. The top seat 102 drives the first fixed block 106 to move closer to each other through the support rod 103. The PVA film on the clamping device fixed to the bottom of the first fixed block 106 is no longer under tension and is relaxed to release the tensile stress.

[0037] Simultaneously, after air escapes from the through hole 202a, when the air pressure above the first piston head 104 inside the cylinder 101 is less than the elastic force of the first spring 204, the movable tube 202 will reset and retract into the fixed tube 201. Then, the air pump will pump air in again. The air pressure above the first piston head 104 inside the cylinder 101 will be greater than the air pressure below it. The first piston head 104 will slide downwards on the inner wall of the cylinder 101, driving the movable rod 105 to retract into the cylinder 101. At this time, the movable rod 105 retracts, driving the top seat 102 to move closer to the cylinder 101. The top seat 102, through the support rod 103, drives the first piston head 104 to retract into the cylinder 101. A fixed block 106 moves away from each other, at which point the PVA film fixed to the clamping device at the bottom of the first fixed block 106 can be stretched a second time. The air pump repeatedly pumps in and stops pumping air, which can release the tensile stress of the PVA film after each stretch. This can avoid uneven stretching that occurs when stretching to the end in one go, reduce the breakage of the PVA film, and improve the yield. Releasing the tensile stress and then stretching again helps to fully extend the length of the PVA film, increase the stretch ratio of the PVA film, and make the PVA film thinner, thereby manufacturing thinner polarizers, which are suitable for flexible displays with high bending requirements.

[0038] Example 2

[0039] Reference Figures 1 to 10 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that...

[0040] One end of the conduit 101b is fixedly connected to the bottom of the cylinder 101, and the other end of the conduit 101b is fixedly connected to the first telescopic rod 107. The top of the first telescopic rod 107 is fixedly connected to the lower surface of the second fixing block 108, and the upper surface of the second fixing block 108 is fixedly connected to the locking block 108a. The movable tube 202 is provided with a locking groove 202b corresponding to the locking block 108a.

[0041] In this preferred embodiment, the air below the first piston head 104 inside the cylinder 101 can enter the first telescopic rod 107 through the conduit 101b. The first telescopic rod 107 extends, pushing the second fixing block 108 to move the locking block 108a. The locking block 108a inserts into the locking groove 202b, locking the position of the movable tube 202, so that the through hole 202a continuously exposes the fixing tube 201. The air above the first piston head 104 inside the cylinder 101 is fully released, causing the first piston head 104 to move upward. The first piston head 104 drives the movable rod 105 to move upward, and the movable rod 105 drives the top seat 102 to move upward. The top seat 102 drives the first fixing block 106 to move towards each other through the support rod 103. The PVA film fixed to the clamping device at the bottom of the first fixing block 106 is no longer under tension and is fully relaxed, releasing the tensile stress.

[0042] Reference Figure 1 and Figure 2 The bottom of the cylinder 101 is fixedly connected to the base plate 109, the base plate 109 is fixedly connected to the lower surface of the support seat 109a, the bottom of the first telescopic rod 107 is fixedly connected to the upper surface of the base plate 109, a second spring 107a is sleeved on the first telescopic rod 107, the bottom of the second spring 107a is fixedly connected to the support seat 109a, and the top of the second spring 107a is fixedly connected to the second fixing block 108.

[0043] In this preferred embodiment, the connecting base plate 109 is used to support and fix the support base 109a and the cylinder 101. When the air pressure inside the first telescopic rod 107 is greater than the tension of the second spring 107a, the first telescopic rod 107 extends, pushing the second fixing block 108 to move the locking block 108a. The locking block 108a inserts into the slot 202b, locking the position of the movable tube 202. When the air pressure inside the first telescopic rod 107 is less than the tension of the second spring 107a, the first telescopic rod 107 retracts, pushing the second fixing block 108 to move the locking block 108a. The locking block 108a pulls out of the slot 202b, releasing the locking of the movable tube 202.

[0044] Reference Figure 5 The clamping assembly 300 also includes a rubber block 304, and the movable seat 301 and the fixed seat 302 are respectively fixedly connected to the rubber block 304 on their relatively close sides.

[0045] In this preferred embodiment, when the movable seat 301 moves toward the fixed seat 302, it causes the top rubber block 304 to move upward. The rubber blocks 304 on the relatively close sides of the movable seat 301 and the fixed seat 302 can clamp the PVA film and fix the PVA film.

[0046] Reference Figure 6 and Figure 7 The clamping assembly 300 also includes a movable component 305, which includes a first clamping rod 305a, a second clamping rod 305b, a first slider 305c, and a spindle 305d. One end of the first clamping rod 305a and the second clamping rod 305b are respectively hinged to the lower surface of the fixed seat 302, and the other end of the first clamping rod 305a and the second clamping rod 305b are hinged to the first slider 305c. The first slider 305c is slidably connected to the inner wall of the first slide groove 301a. The first slide groove 301a is opened at the top of the movable seat 301. The first clamping rod 305a is provided with a first through groove 305a-1, and the second clamping rod 305b is provided with a second through groove 305b-1. The first clamping rod 305a and the second clamping rod 305b are arranged crosswise. The spindle 305d is slidably connected to the inner walls of the first through groove 305a-1 and the second through groove 305b-1.

[0047] In this embodiment, preferably, the first clamping rod 305a and the second clamping rod 305b are configured as two sets on the mandrel 305d, which helps to improve the stability of the first clamping rod 305a and the second clamping rod 305b during movement. The bottom of the first clamping rod 305a and the second clamping rod 305b can drive the first slider 305c to slide inside the first slide groove 301a. The first slider 305c is preferably a dovetail slider, and the first slide groove 301a is preferably a dovetail slide groove. To prevent the first slider 305c from disengaging from the first slide groove 301a, the mandrel 305d can slide on the inner wall of the first through groove 305a-1 and the second through groove 305b-1. Furthermore, the first clamping rod 305a and the second clamping rod 305b are respectively configured as one set at each end of the rubber block 304, which helps to improve the stability of the movable seat 301 when sliding towards the fixed seat 302 and prevents displacement during the PVA film clamping process.

[0048] Reference Figure 7 The clamping assembly 300 also includes a second telescopic rod 306, which includes a fixed cylinder 306a and a movable cylinder 306d. The fixed cylinder 306a is fixedly connected to the fixed seat 302, the inner wall of the fixed cylinder 306a is slidably connected to the outer wall of the movable cylinder 306d, and the outer wall of the movable cylinder 306d is fixedly connected to the spindle 305d.

[0049] In this preferred embodiment, when the second telescopic rod 306 retracts, it drives the spindle 305d to move upward, and the bottoms of the first clamping rod 305a and the second clamping rod 305b open. When the tops of the first clamping rod 305a and the second clamping rod 305b drive the movable seat 301 to slide upward along the limiting rod 303, they drive the bottom rubber block 304 to move upward. The rubber block 304 on the relatively close side of the movable seat 301 and the fixed seat 302 can clamp the PVA film and fix the PVA film.

[0050] Reference Figure 7 and Figure 8 The fixed base 302 has a cavity 302a inside, which is connected to the outside through the second air inlet pipe 302b. The inner wall of the cavity 302a is slidably connected to the second piston head 302c. The second piston head 302c is fixedly connected to the toothed plate 302d. The toothed plate 302d is meshed with the worm 302e. One end of the worm 302e is rotatably connected to the sleeve 302f. The sleeve 302f is fixedly connected to the inner wall of the cavity 302a. The other end of the worm 302e is threaded and is threaded to the inner wall of the movable cylinder 306d.

[0051] In this preferred embodiment, the existing air pump is connected to the air inlet pipe 302b, which can pump air into the cavity 302a. Under the action of air pressure, the second piston head 302c will slide on the inner wall of the cavity 302a. The second piston head 302c drives the toothed plate 302d to move, and the toothed plate 302d drives the worm 302e to rotate. The thread of the worm 302e rotates inside the movable cylinder 306d, which can drive the movable cylinder 306d to retract into the fixed cylinder 306a. The movable cylinder 306d drives the spindle 305d to move upward.

[0052] Reference Figure 8 A limiting block 302d-1 is fixedly connected to the toothed plate 302d, and the limiting block 302d-1 is slidably connected to the inner wall of the cavity 302a.

[0053] In this preferred embodiment, the second piston head 302c slides on the inner wall of the cavity 302a, and the second piston head 302c drives the toothed plate 302d to move. The toothed plate 302d drives the limiting block 302d-1 to slide on the inner wall of the cavity 302a, which helps to improve the stability of the toothed plate 302d when it moves.

[0054] Reference Figure 6 The clamping assembly 300 also includes a second slider 307 and a second slide groove 308. The second slider 307 is fixedly connected to a limiting rod 303 on one side, and slidably connected to the inner wall of the second slide groove 308 on the other side. The outer wall of the second slide groove 308 is fixedly connected to a base plate 109.

[0055] In this preferred embodiment, when the first fixed block 106 moves, it can drive the fixed seat 302 to move. The fixed seat 302 can drive the limiting rod 303 and the second slider 307 to move. Under the limiting action of the second slide groove 308, the fixed seat 302 and the movable seat 301 move horizontally.

[0056] Reference Figure 4 The inner wall of the fixed tube 201 is fixedly connected to the limiting ring 201a.

[0057] In this preferred embodiment, the limiting ring 201a can prevent the movable tube 202 from sliding out of the fixed tube 201.

[0058] In use, connecting the existing air pump to the air inlet pipe 302b allows air to be pumped into the cavity 302a. Under the action of air pressure, the second piston head 302c slides against the inner wall of the cavity 302a. The second piston head 302c drives the toothed plate 302d to move, and the toothed plate 302d drives the worm gear 302e to rotate. The thread of the worm gear 302e rotates inside the movable cylinder 306d, which can drive the movable cylinder 306d to retract into the fixed cylinder 306a. The movable cylinder 306d drives the spindle 305d to move upward, and the bottoms of the first clamping rod 305a and the second clamping rod 305b open. The tops of the first clamping rod 305a and the second clamping rod 305b drive the fixed seat 302 to slide upward along the limiting rod 303, which drives the bottom rubber block 304 to move upward. The rubber block 304 on the relatively close side of the movable seat 301 and the fixed seat 302 can clamp the PVA film and fix the PVA film.

[0059] After connecting another air pump to the first intake pipe 101a, the air pump pumps air into the cylinder 101 through the first intake pipe 101a. Figure 3 When the air pressure above the first piston head 104 inside the cylinder 101 is greater than the air pressure below it, the first piston head 104 slides downward on the inner wall of the cylinder 101. The first piston head 104 drives the movable rod 105 to retract into the cylinder 101. At this time, the movable rod 105 retracts, driving the top seat 102 to move closer to the cylinder 101. The top seat 102 drives the first fixed block 106 to move away from each other through the support rod 103. At this time, the PVA film clamped between the two rubber blocks 304 on the movable seat 301 and the fixed seat 302 can be stretched for the first time on the clamping assembly 300 fixed to the bottom of the first fixed block 106.

[0060] As the air pump continues to pump air in, when the air pressure above the first piston head 104 inside the cylinder 101 is greater than the elastic force of the first spring 204, the movable tube 202, movable plate 203, and baffle 205 overcome the elastic force of the first spring 204 and slide outward until the through hole 202a exposes the fixed tube 201. At this point, the slot 202b also moves to the position above the locking block 108a. Since the air below the first piston head 104 inside the cylinder 101 can enter the first telescopic rod 107 through the conduit 101b, the first telescopic rod 107 extends, pushing the second fixed block 108 to move the locking block 108a. The locking block 108a inserts into the slot 202b, locking the position of the movable tube 202, so that the through hole 202a continues to expose the fixed tube 201. The air above the first piston head 104 inside the cylinder 101 escapes fully, causing the first piston head 104 to move upward.

[0061] As the first piston head 104 moves upward, the air pressure inside the cylinder 101 below the first piston head 104 decreases. Air inside the first telescopic rod 107 flows back into the cylinder 101 through the conduit 101b. Since the air pressure inside the first telescopic rod 107 is less than the tension of the second spring 107a, the first telescopic rod 107 retracts, pushing the second fixing block 108 to move the locking block 108a. The locking block 108a pulls out of the locking slot 202b, releasing the locking of the movable tube 202. This prevents the movable tube 202 from immediately retracting into the fixed tube 201 during the upward movement of the first piston head 104, which would result in insufficient relaxation of the PVA membrane and inadequate release of tensile stress. After the air escapes from the through hole 202a, when the air pressure above the first piston head 104 inside the cylinder 101 is less than the elastic force of the first spring 204, the movable tube 202 will reset and retract into the fixed tube 201.

[0062] As air escapes, the air pump stops pumping air in. The air pressure above the first piston head 104 inside the cylinder 101 decreases as the air pressure escapes. When the air pressure below the first piston head 104 is greater than the air pressure above the first piston head 104, the first piston head 104 moves upward. The first piston head 104 drives the movable rod 105 to move upward, and the movable rod 105 drives the top seat 102 to move upward. The top seat 102 drives the first fixed block 106 to move closer to each other through the support rod 103. The PVA film fixed to the clamping device at the bottom of the first fixed block 106 is no longer under tension and is relaxed, releasing the tensile stress.

[0063] The air pump pumps air into the cylinder 101 again. The air pressure above the first piston head 104 inside the cylinder 101 is greater than the air pressure below it. The first piston head 104 slides downward on the inner wall of the cylinder 101. The first piston head 104 drives the movable rod 105 to retract into the cylinder 101. At this time, the movable rod 105 retracts, driving the top seat 102 to move closer to the cylinder 101. The top seat 102 drives the first fixed block 106 to move away from each other through the support rod 103. At this time, the first fixed block 106 can be fixed. The PVA film on the bottom clamping component 300 is stretched a second time. The air pump repeatedly pumps air in or stops pumping air, which can release the tensile stress of the PVA film after each stretch. This can avoid uneven stretching that occurs when stretching to the end in one go, reduce the breakage of the PVA film, and improve the yield. Releasing the tensile stress and then stretching again helps to fully extend the length of the PVA film, increase the stretch ratio of the PVA film, and make the PVA film thinner, thereby manufacturing thinner polarizers, which are suitable for flexible displays with high bending requirements.

Claims

1. An apparatus for preparing ultrathin polarizers, characterized in that: include A drive assembly (100) includes a cylinder (101), a top seat (102), a support rod (103), a first piston head (104), a movable rod (105), and a first fixed block (106). A first air intake pipe (101a) is provided on the top of the cylinder (101). The first piston head (104) is slidably connected to the inner wall of the cylinder (101). The first piston head (104) is fixedly connected to one end of the movable rod (105). The movable rod (105) is slidably connected to the cylinder (101), and the other end of the movable rod (105) is fixedly connected to the top seat (102). The top seat (102) is hinged to one end of the support rod (103), and the other end of the support rod (103) is hinged to the first fixed block (106). The control component (200) includes a fixed tube (201), a movable tube (202), a movable plate (203), a first spring (204), and a baffle (205). The fixed tube (201) is fixedly connected to the cylinder (101), and the fixed tube (201) is slidably connected to the movable tube (202). The movable tube (202) is provided with a through hole (202a). One end of the movable tube (202) is fixedly connected to the baffle (205), and the outer wall of the other end of the movable tube (202) is fixedly connected to the movable plate (203). The movable plate (203) is fixedly connected to one end of the first spring (204), and the other end of the first spring (204) is fixedly connected to the inner wall of the fixed tube (201). The clamping assembly (300) includes a movable seat (301), a fixed seat (302) and a limiting rod (303). The upper surface of the fixed seat (302) is fixedly connected to a first fixing block (106), and the two ends of the fixed seat (302) are fixedly connected to the limiting rod (303). The limiting rod (303) is slidably connected to the movable seat (301).

2. The ultrathin polarizer fabrication apparatus as described in claim 1, characterized in that: The bottom of the cylinder (101) is fixedly connected to one end of the conduit (101b), and the other end of the conduit (101b) is fixedly connected to the first telescopic rod (107). The top of the first telescopic rod (107) is fixedly connected to the lower surface of the second fixing block (108), and the upper surface of the second fixing block (108) is fixedly connected to the card block (108a). The movable tube (202) is provided with a card slot (202b) corresponding to the card block (108a).

3. The ultrathin polarizer fabrication apparatus as described in claim 2, characterized in that: The bottom of the cylinder (101) is fixedly connected to the bottom plate (109), the bottom plate (109) is fixedly connected to the lower surface of the support seat (109a), the bottom of the first telescopic rod (107) is fixedly connected to the upper surface of the bottom plate (109), a second spring (107a) is sleeved on the first telescopic rod (107), the bottom of the second spring (107a) is fixedly connected to the support seat (109a), and the top of the second spring (107a) is fixedly connected to the second fixing block (108).

4. The ultrathin polarizer fabrication apparatus as described in claim 3, characterized in that: The clamping assembly (300) also includes a rubber block (304), and the movable seat (301) and the fixed seat (302) are respectively fixedly connected to the rubber block (304) on their relatively close sides.

5. The ultrathin polarizer fabrication apparatus as described in claim 1, characterized in that: The clamping assembly (300) further includes a movable component (305), which includes a first clamping rod (305a), a second clamping rod (305b), a first slider (305c), and a spindle (305d). One end of the first clamping rod (305a) and the second clamping rod (305b) are respectively hinged to the lower surface of the fixed base (302), and the other end of the first clamping rod (305a) and the second clamping rod (305b) are respectively hinged to the first slider (305c). 5c) The inner wall of the first slide groove (301a) is slidably connected. The first slide groove (301a) is opened at the top of the movable seat (301). The first clamping rod (305a) is provided with a first through groove (305a-1), and the second clamping rod (305b) is provided with a second through groove (305b-1). The first clamping rod (305a) and the second clamping rod (305b) are arranged crosswise. The spindle (305d) is slidably connected to the inner wall of the first through groove (305a-1) and the second through groove (305b-1).

6. The ultrathin polarizer fabrication apparatus as described in claim 5, characterized in that: The clamping assembly (300) further includes a second telescopic rod (306), which includes a fixed cylinder (306a) and a movable cylinder (306d). The fixed cylinder (306a) is fixedly connected to the fixed seat (302), and the inner wall of the fixed cylinder (306a) is slidably connected to the outer wall of the movable cylinder (306d). The outer wall of the movable cylinder (306d) is fixedly connected to the spindle (305d).

7. The ultrathin polarizer fabrication apparatus as described in claim 6, characterized in that: The fixed base (302) has a cavity (302a) inside, which is connected to the outside through a second air inlet pipe (302b). A second piston head (302c) is slidably connected to the inner wall of the cavity (302a). The second piston head (302c) is fixedly connected to a toothed plate (302d). The toothed plate (302d) is meshed with a worm (302e). One end of the worm (302e) is rotatably connected to a sleeve (302f). The sleeve (302f) is fixedly connected to the inner wall of the cavity (302a). The other end of the worm (302e) is threaded and threaded to the inner wall of the movable cylinder (306d).

8. The ultrathin polarizer fabrication apparatus as described in claim 7, characterized in that: The toothed plate (302d) is fixedly connected to the limiting block (302d-1), and the limiting block (302d-1) is slidably connected to the inner wall of the cavity (302a).

9. The ultrathin polarizer fabrication apparatus as described in claim 4, characterized in that: The clamping assembly (300) further includes a second slider (307) and a second slide groove (308). A limiting rod (303) is fixedly connected to one side of the second slider (307), and the inner wall of the second slide groove (308) is slidably connected to the other side of the second slider (307). A base plate (109) is fixedly connected to the outer wall of the second slide groove (308).

10. The ultrathin polarizer fabrication apparatus as described in claim 1, characterized in that: The inner wall of the fixed tube (201) is fixedly connected to the limiting ring (201a).

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