Waste LCD (liquid crystal display) polarizing film separation and recovery device and method

Abstract

The invention relates to the field of LCD screen polarizing film recovery, in particular to a waste LCD polarizing film separation and recovery device and method.The waste LCD polarizing film separation and recovery device comprises a screening box, a water inlet pipe is connected to one side of the screening box in a penetrating mode, a water outlet pipe is connected to the side, away from the water inlet pipe, of the screening box in a penetrating mode, and a feeding frame is connected to the upper portion of the screening box in a penetrating mode. According to the device, the waste LCD screen is firstly heated, glue bonded to the waste LCD screen is softened, then the waste LCD screen is in attached contact with the crushing crankset, the crushing crankset can crush the waste LCD screen in a layered mode, the situation that all layers are not thoroughly separated after crushing is avoided, floating polarizing film fragments and a water source are collected through rotation of a water containing frame, and the water source is recycled. And the vibrating filter frame and the filter box can float out of the water together through contraction of the electric push rod, so that the polarizing film fragments and other fragments can be conveniently and rapidly recycled, and in this way, the screening quality and the screening efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the field of recycling polarizing films of LCD screens, and in particular to a device and method for separating and recycling waste LCD polarizing films. Background Art

[0002] LCD polarizing film is an optical film with a specific polarization direction, which only allows light in a specific direction to pass through. In LCD, polarizing film mainly plays two roles: one is to control the polarization direction of light so that light can pass through the liquid crystal layer according to the predetermined path; the other is to prevent light from passing through when the liquid crystal layer is not powered, thereby forming a dark state on the screen. When the liquid crystal layer is powered, the arrangement direction of the liquid crystal molecules will change, thereby changing the polarization direction of the light, allowing part of the light to pass through the polarizing film and form an image.

[0003] The Chinese invention patent application with the publication number CN118325189A discloses a method for recycling an optical film, comprising the following steps: placing a discarded optical film in an acidic solution to obtain a mixture. The discarded optical film contains a polyvinyl alcohol polymer. The solid matter and the liquid matter of the mixture are separated. The liquid matter is adjusted to become a mixed solution, and the pH value of the mixed solution is greater than or equal to 7. The mixed solution contains polyvinyl alcohol precipitates.

[0004] Since LCD polarizing films are expensive to produce and have recycling value, it is necessary to recycle the polarizing films in discarded LCD screens. However, since display screens are generally divided into multiple layers, the efficiency of disassembling the polarizing film layers for recycling is low and cannot meet the requirements of recycling a large number of polarizing films. Therefore, mechanical crushing is generally used, and then water is used to float the polarizing film in the fragments to separate it from other fragments. Finally, the polarizing film is screened by screening. However, this method first heats the screen during the crushing process to soften it, but the traditional crusher cannot ensure that the broken polarizing layer and each screen layer can be completely separated for better screening. In addition, in the existing screening process, manual scooping is required, which reduces the screening efficiency.

[0005] Therefore, it is necessary to invent a waste LCD polarizing film separation and recovery device and method to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a waste LCD polarizing film separation and recovery device and method, which ensures that the broken polarizing film layers can be completely separated by a layered crushing method, thereby improving the screening quality, and collects the polarizing film fragments into a filter box by rotating a water frame, thereby improving the screening and collection efficiency, so as to solve the problems of low efficiency and poor quality of screening and collection of polarizing film fragments in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solution: a waste LCD polarizing film separation and recovery device, comprising a screening box, one side of the screening box is connected to a water inlet pipe, the side of the screening box away from the water inlet pipe is connected to a water outlet pipe, and the top of the screening box is connected to a feed frame;

[0008] A crushing assembly, disposed in the feed frame, for crushing the waste screen into fragments;

[0009] A feeding assembly is arranged in the feeding frame and is used to convey the waste screen along the crushing assembly;

[0010] The screening component is arranged in the screening box and is used for recovering polarizing film fragments from the fragments.

[0011] As a preferred embodiment of the present invention, the crushing assembly includes a crushing tooth plate, which is symmetrically rotatably connected to the inner wall of the feed frame and is installed in two groups downward in sequence. A belt transmission structure 1 is installed on one side of the two groups of crushing tooth plates, and the belt transmission structure 1 includes a driving motor, two groups of pulleys and a belt. The driving motor and one group of crushing tooth plates are axially connected, and a pulley is installed at the axial connection. The other group of crushing tooth plates is axially connected to the pulley, and a belt is installed between the two groups of pulleys.

[0012] As a preferred solution of the present invention, a protective box is symmetrically installed on one side of the feed frame, and two groups of belt transmission structures are respectively arranged in the two groups of protective boxes. Three groups of crushing shafts are connected to the inner wall of the feed frame and rotate downward in sequence. A motor is connected to one side of the top crushing shaft, and the motor is fixedly connected to the feed frame.

[0013] As a preferred solution of the present invention, a bevel gear 1 is axially connected to the side of the crushing shaft away from the motor 1, and a bevel gear 1 is installed on one side of the three groups of crushing shafts, a protective box 2 is installed on the side of the feed frame away from the motor 1, a connecting shaft is rotatably connected to the inner wall of the protective box 2, three groups of bevel gears 2 are sleeved and fixed on the connecting shaft, and the three groups of bevel gears 2 are meshed with the corresponding bevel gear 1, and a guide hopper is installed above the screening box, and the guide hopper is communicated with the inside of the feed frame.

[0014] As a preferred solution of the present invention, the feeding assembly includes a limit groove, which is symmetrically opened above the inside of the feed frame. A connecting frame is arranged in the feed frame, and the opening direction of the connecting frame is arranged opposite to the crushing tooth plate and the crushing shaft. Limit blocks are symmetrically installed on the outside of the connecting frame, and the limit blocks are slidably connected to the corresponding limit grooves.

[0015] As a preferred solution of the present invention, a fixed frame is arranged inside the feed frame, spring clamps are symmetrically installed on the inner wall of the fixed frame, guide blocks are symmetrically installed on the outer side of the fixed frame, guide grooves are symmetrically opened on the inner wall of the fixed frame, and the guide grooves are slidably connected to the corresponding guide blocks, and multiple groups of spring push rods are installed between the connecting frame and the fixed frame.

[0016] As a preferred solution of the present invention, a protective box three is installed on the side of the feed frame away from the protective box one, a motor two is installed above the protective box three, a screw is rotatably connected to the inner wall of the protective box three, and the screw is axially connected to the output end of the motor two, an internal thread block is screwed on the screw, and the internal thread block is fixedly connected to the outer side of the connecting frame.

[0017] As a preferred solution of the present invention, the screening assembly includes an electric push rod, which is installed at the four corners of the screening box. A vibration filter frame is installed at the output end of the electric push rod. A fixed frame is symmetrically installed in the vibration filter frame. A filter box is installed between two groups of the fixed frames. A rotating shaft is symmetrically connected and rotated above the two groups of the fixed frames. Multiple groups of water holding frames are installed in a ring-shaped distribution on the two groups of the rotating shafts.

[0018] As a preferred solution of the present invention, a belt transmission structure 2 is installed between the two groups of rotating shafts, and the belt transmission structure 2 includes a driving motor, two groups of pulleys and a group of belts. The driving motor is connected to one end of a group of rotating shafts, and a pulley is installed at the opposite end of this group of rotating shafts, and a pulley is installed at one end of the other group of pulleys, and a belt is installed between the two groups of pulleys.

[0019] The waste LCD polarizing film separation and recovery method comprises the waste LCD polarizing film separation and recovery device as described above, and the specific processing steps are as follows:

[0020] S1: preheating the waste screen to soften the glue between the layers inside it, then installing it into the fixed frame and moving it downward through the connecting frame, so that the whole screen moves downward;

[0021] S2: At this time, the crushing tooth plate and the crushing shaft are turned on, so that the waste screen can slide down and slide along the surface of the crushing tooth plate. At the same time, the crushing tooth plate crushes it in layers, and finally the crushing shaft crushes the remaining part as a whole;

[0022] S3: The crushed fragments fall into the screening box, and the polarizing film fragments are floated by the internal water source. At the same time, the water source containing the polarizing film fragments is transported to the filter box through the rotation of the water frame, thereby completing the screening of the polarizing film fragments.

[0023] In the above technical solution, compared with the prior art, the technical effects and advantages provided by the present invention are as follows:

[0024] The discarded LCD screen is first heated to soften the adhesive, and then it is fitted into contact with the crushing tooth plate, so that the crushing tooth plate can crush the discarded LCD screen in layers, avoiding the situation that the layers are not completely separated after crushing. This crushing method can separate the thinner polarizing layer from the glass substrate, and through the rotation of the water frame, the floating polarizing film fragments and water are collected, and finally poured into the filter box with continuous rotation, and through the contraction of the electric push rod, the vibration filter frame and the filter box can float to the surface together, so as to facilitate the rapid recovery of the polarizing film fragments and other fragments. In this way, the quality of screening and the efficiency of screening can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the screening box of the present invention;

[0028] Figure 3 It is a schematic diagram of the planing structure of the screening box of the present invention;

[0029] Figure 4 It is a schematic diagram of the feeding frame structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the layout structure of the water holding frame of the present invention;

[0031] Figure 6 It is a schematic diagram of the planing structure of the feed frame of the present invention;

[0032] Figure 7 It is a schematic diagram of the connection structure of the connection frame and the fixing frame of the present invention.

[0033] Description of reference numerals:

[0034] 001, screening box; 101, water inlet pipe; 102, water outlet pipe; 103, feed frame; 002, crushing assembly; 201, crushing tooth plate; 202, belt drive structure 1; 203, protection box 1; 204, crushing shaft; 205, motor 1; 206, bevel gear 1; 207, protection box 2; 208, connecting shaft; 209, bevel gear 2; 210, guide hopper; 003, feeding assembly; 301, limit slot; 302, connecting frame ; 303, limit block; 304, fixed frame; 305, spring clamp; 306, guide block; 307, guide groove; 308, spring push rod; 309, protective box three; 310, motor two; 311, screw; 312, internal thread block; 004, screening component; 401, electric push rod; 402, vibration filter frame; 403, fixed frame; 404, filter box; 405, rotating shaft; 406, water frame; 407, belt drive structure two. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] The present invention provides Figure 1-7 The waste LCD polarizing film separation and recovery device shown includes a screening box 001, a water inlet pipe 101 is connected to one side of the screening box 001, a water outlet pipe 102 is connected to the side of the screening box 001 away from the water inlet pipe 101, and a feed frame 103 is connected to the top of the screening box 001;

[0037] A crushing assembly 002, disposed in the feed frame 103, is used to crush the waste screen into fragments;

[0038] The feeding assembly 003 is arranged in the feeding frame 103 and is used to convey the waste screen along the crushing assembly 002;

[0039] The screening component 004 is arranged in the screening box 001 and is used for recovering polarizing film fragments from the fragments.

[0040] Furthermore, in the above structure, the crushing component 002 includes a crushing tooth plate 201, which is symmetrically rotatably connected to the inner wall of the feed frame 103, and two groups are installed downward in sequence. A belt transmission structure 202 is installed on one side of the two groups of crushing tooth plates 201, and the belt transmission structure 202 includes a driving motor, two groups of pulleys and belts. The driving motor and one group of crushing tooth plates 201 are axially connected, and a pulley is installed at the axial connection. The other group of crushing tooth plates 201 is axially connected to the pulley, and a belt is installed between the two groups of pulleys.

[0041] The belt transmission structure 202 can drive two groups of crushing tooth plates 201 to rotate in the same direction and synchronously, and the rotation directions of the two opposite groups of crushing tooth plates 201 are opposite to each other, so that the crushing tooth plates 201 can contact the surface of the discarded LCD screen, ensuring that the discarded LCD screen can be crushed in layers. Compared with the traditional crushing method, this crushing method uses the crushing tooth plates 201 to fit the surface of the discarded LCD screen, so that the surface of the discarded LCD screen can be peeled off and crushed in layers, thereby achieving perfect crushing of thicker or thinner polarized layers.

[0042] Furthermore, in the above structure, a protective box 203 is symmetrically installed on one side of the feed frame 103, and two sets of belt drive structures 202 are respectively arranged in the two sets of protective boxes 203, and three sets of crushing shafts 204 are connected to the inner wall of the feed frame 103 so as to rotate downward in sequence. A motor 205 is connected to one side of the top crushing shaft 204, and the motor 205 is fixedly connected to the feed frame 103.

[0043] The motor 205 can drive the crushing shaft 204 to rotate, so that the crushing shaft 204 can crush the discarded LCD screen as a whole, and at this time, the polarizing layer of the discarded LCD screen has been completely crushed by the crushing tooth disc 201.

[0044] Furthermore, in the above structure, a bevel gear 206 is connected to the crushing shaft 204 on one side away from the motor 205, and a bevel gear 206 is installed on one side of the three groups of crushing shafts 204, a protective box 207 is installed on the side of the feed frame 103 away from the motor 205, a connecting shaft 208 is rotatably connected to the inner wall of the protective box 207, three groups of bevel gears 209 are sleeved and fixed on the connecting shaft 208, and the three groups of bevel gears 209 are meshed with the corresponding bevel gears 206, a guide hopper 210 is installed above the screening box 001, and the guide hopper 210 is communicated with the inside of the feed frame 103.

[0045] A set of bevel gears 1 206 drives a set of bevel gears 209, so that the connecting shaft 208 drives the other two sets of bevel gears 209 to rotate, so that the three sets of crushing shafts 204 can rotate, thereby ensuring the crushing quality of the waste LCD screens, and the crushed waste LCD screen fragments can enter the screening box 001 through the guide hopper 210.

[0046] Furthermore, in the above structure, the feeding component 003 includes a limit groove 301, which is symmetrically arranged above the inside of the feed frame 103. A connecting frame 302 is arranged in the feed frame 103, and the opening direction of the connecting frame 302 is opposite to the crushing tooth plate 201 and the crushing shaft 204. The limit block 303 is symmetrically installed on the outside of the connecting frame 302, and the limit block 303 is slidably connected to the corresponding limit groove 301.

[0047] Through the cooperation of the limiting groove 301 and the limiting block 303 , the connecting frame 302 can stably slide up and down in the feeding frame 103 and move to the position of the crushing tooth plate 201 and the crushing shaft 204 .

[0048] Furthermore, in the above structure, a fixed frame 304 is arranged inside the feed frame 103, spring clamps 305 are symmetrically installed on the inner wall of the fixed frame 304, guide blocks 306 are symmetrically installed on the outer side of the fixed frame 304, guide grooves 307 are symmetrically opened on the inner wall of the fixed frame 304, and the guide grooves 307 are slidably connected to the corresponding guide blocks 306, and multiple groups of spring push rods 308 are installed between the connecting frame 302 and the fixed frame 304.

[0049] The discarded LCD screen can be fixed in the fixed frame 304 through the spring clamp 305, and due to the action of the spring push rod 308, the discarded LCD screen can always fit with the broken tooth plate 201 on one side, and the cooperation of the guide block 306 and the guide groove 307 can ensure the movement limit of the fixed frame 304.

[0050] Furthermore, in the above structure, a protection box three 309 is installed on the side of the feed frame 103 away from the protection box one 203, and a motor two 310 is installed above the protection box three 309. A screw 311 is rotatably connected to the inner wall of the protection box three 309, and the screw 311 is axially connected to the output end of the motor two 310. An internal thread block 312 is screwed on the screw 311, and the internal thread block 312 is fixedly connected to the outer side of the connecting frame 302.

[0051] The motor 2 310 can drive the screw 311 to rotate, so that the screw 311 drives the internal thread block 312 to move, and the internal thread block 312 drives the connecting frame 302 to move as a whole in the feed frame 103, thereby ensuring that the discarded LCD screen moves to the position of the crushing tooth plate 201 and the crushing shaft 204.

[0052] Furthermore, in the above structure, the screening component 004 includes an electric push rod 401, which is installed at the four corners of the screening box 001. A vibration filter frame 402 is installed at the output end of the electric push rod 401. A fixed frame 403 is symmetrically installed in the vibration filter frame 402. A filter box 404 is installed between the two groups of fixed frames 403. A rotating shaft 405 is symmetrically connected to the top of the two groups of fixed frames 403, and a plurality of water holding frames 406 are installed in a ring-shaped distribution on the two groups of rotating shafts 405.

[0053] The vibration filter frame 402 is covered with water. When the vibration filter frame 402 vibrates, the polarized film fragments can be screened and floated, so that the polarized film fragments float to the surface of the water source. When the water holding frame 406 rotates, the lowest water holding frame 406 can contact the water surface, and the polarized film fragments can be picked up and poured into the filter box 404 together with the internal water source as it continues to rotate. The electric push rod 401 can make the vibration filter frame 402 move up and down in the screening box 001, so that the fragments falling into the vibration filter frame 402 can be picked up and collected, and the polarized film fragments in the filter box 404 can also be collected.

[0054] Furthermore, in the above structure, a belt transmission structure 407 is installed between the two groups of rotating shafts 405. The belt transmission structure 407 includes a driving motor, two groups of pulleys and a group of belts. The driving motor is connected to one end of a group of rotating shafts 405, and a pulley is installed at the opposite end of this group of rotating shafts 405, and a pulley is installed at one end of the other group of pulleys, and a belt is installed between the two groups of pulleys.

[0055] The two groups of water containing frames 406 can be driven to rotate by the second belt transmission structure 407, so as to collect the polarizing film fragments.

[0056] The waste LCD polarizing film separation and recovery method includes the waste LCD polarizing film separation and recovery device as above, and the specific processing steps are as follows:

[0057] S1: preheating the waste screen to soften the glue between the layers inside it, then installing it into the fixing frame 304 and moving it downward through the connecting frame 302, so that the whole screen moves downward;

[0058] S2: At this time, the crushing tooth plate 201 and the crushing shaft 204 are turned on, so that the waste screen can slide downward and slide along the surface of the crushing tooth plate 201. At the same time, the crushing tooth plate 201 crushes it in layers, and finally the crushing shaft 204 crushes the remaining part as a whole;

[0059] S3: The crushed fragments fall into the screening box 001, and the polarizing film fragments are floated by the internal water source. At the same time, the water source containing the polarizing film fragments is transported to the filter box 404 through the rotation of the water frame 406, thereby completing the screening of the polarizing film fragments.

[0060] like Figure 1-7As shown, by heating the discarded LCD screen and placing it into the fixed frame 304 through the spring clamp 305, the position of the fixed frame 304 in the connecting frame 302 is changed, and the connecting frame 302 is driven downward by the motor 2 310, and the crushing tooth plate 201 and the crushing shaft 204 are turned on to rotate, so that the discarded LCD screen can be broken into fragments, so that the fragments can fall into the water source in the screening box 001, and finally fall onto the vibration filter frame 402, so that the vibration filter frame 402 can screen the polarizing film fragments mixed in the fragments and float along the water source, and at the same time the water frame 406 rotates to hold the floating polarizing film fragments and the water source together. The polarizing film fragments and the remaining fragments are collected, thereby completing the recovery of the polarizing film. This structure can ensure that the polarizing film layer and the remaining layers of the screen are completely separated, and through vibration, the mixed polarizing film can float on the water surface, thereby ensuring the quality during screening, and through the rotation of the water holding frame 406, the water and the floating polarizing film fragments are salvaged and poured into the filter box 404, thereby realizing the automatic collection of the polarizing film fragments and improving the efficiency of its screening and recovery.

[0061] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waste LCD polarizing film separation and recovery device, comprising a screening box (001), characterized in that: A water inlet pipe (101) is connected through one side of the screening box (001), a water outlet pipe (102) is connected through one side of the screening box (001) away from the water inlet pipe (101), and a feed frame (103) is connected through the top of the screening box (001); A crushing assembly (002), arranged in the feed frame (103), is used to crush the waste screen into fragments; A feeding assembly (003) is arranged in the feeding frame (103) and is used to convey the waste screen along the crushing assembly (002); The screening component (004) is arranged in the screening box (001) and is used to recover polarizing film fragments from the fragments.

2. The waste LCD polarizing film separation and recovery device according to claim 1, characterized in that: The crushing assembly (002) comprises a crushing toothed disc (201), which is symmetrically rotatably connected to the inner wall of the feed frame (103), and two groups are sequentially installed downward, and a belt transmission structure (202) is installed on one side of the two groups of crushing toothed discs (201), and the belt transmission structure (202) comprises a driving motor, two groups of pulleys and a belt, the driving motor and one group of crushing toothed discs (201) are axially connected, and a pulley is installed at the axial connection, and the other group of crushing toothed discs (201) is axially connected to the pulley, and a belt is installed between the two groups of pulleys.

3. The waste LCD polarizing film separation and recovery device according to claim 2, characterized in that: A protective box (203) is symmetrically installed on one side of the feed frame (103), and two groups of belt transmission structures (202) are respectively arranged in the two groups of protective boxes (203). Three groups of crushing shafts (204) are connected to the inner wall of the feed frame (103) in sequence and rotate downward. A motor (205) is axially connected to one side of the top crushing shaft (204), and the motor (205) is fixedly connected to the feed frame (103).

4. The waste LCD polarizing film separation and recovery device according to claim 3, characterized in that: The crushing shaft (204) is connected to a bevel gear (206) on one side away from the motor (205), and the three groups of crushing shafts (204) are all installed with a bevel gear (206) on one side. The feeding frame (103) is installed with a protection box (207) on the side away from the motor (205). The inner wall of the protection box (207) is rotatably connected with a connecting shaft (208). Three groups of bevel gears (209) are sleeved and fixed on the connecting shaft (208), and the three groups of bevel gears (209) are meshed with the corresponding bevel gears (206). A guide hopper (210) is installed above the screening box (001), and the guide hopper (210) is connected to the inside of the feeding frame (103).

5. The waste LCD polarizing film separation and recovery device according to claim 1, characterized in that: The feeding assembly (003) comprises a limit groove (301), wherein the limit groove (301) is symmetrically arranged above the inside of the feeding frame (103), a connecting frame (302) is arranged inside the feeding frame (103), and the opening direction of the connecting frame (302) is arranged opposite to the crushing tooth plate (201) and the crushing shaft (204), and a limit block (303) is symmetrically installed on the outside of the connecting frame (302), and the limit block (303) is slidably connected to the corresponding limit groove (301).

6. The waste LCD polarizing film separation and recovery device according to claim 5, characterized in that: A fixed frame (304) is arranged inside the feed frame (103), a spring clamp (305) is symmetrically installed on the inner wall of the fixed frame (304), a guide block (306) is symmetrically installed on the outer side of the fixed frame (304), a guide groove (307) is symmetrically opened on the inner wall of the fixed frame (304), and the guide groove (307) is slidably connected to the corresponding guide block (306), and a plurality of groups of spring push rods (308) are installed between the connecting frame (302) and the fixed frame (304).

7. The waste LCD polarizing film separation and recovery device according to claim 5, characterized in that: A protection box three (309) is installed on the side of the feed frame (103) away from the protection box one (203), and a motor two (310) is installed above the protection box three (309). A screw (311) is rotatably connected to the inner wall of the protection box three (309), and the screw (311) is axially connected to the output end of the motor two (310). An internal thread block (312) is screwed on the screw (311), and the internal thread block (312) is fixedly connected to the outer side of the connecting frame (302).

8. The waste LCD polarizing film separation and recovery device according to claim 1, characterized in that: The screening component (004) comprises an electric push rod (401), wherein the electric push rod (401) is installed at the four corners of the screening box (001), a vibration filter frame (402) is installed at the output end of the electric push rod (401), a fixing frame (403) is symmetrically installed inside the vibration filter frame (402), a filter box (404) is installed between two groups of the fixing frames (403), a rotating shaft (405) is symmetrically rotatably connected above the two groups of the fixing frames (403), and a plurality of water holding frames (406) are installed in a ring-shaped distribution on the two groups of the rotating shafts (405).

9. The waste LCD polarizing film separation and recovery device according to claim 8, characterized in that A second belt transmission structure (407) is installed between the two groups of rotating shafts (405), and the second belt transmission structure (407) includes a driving motor, two groups of pulleys and a group of belts. The driving motor is connected to one end of a group of rotating shafts (405), and a pulley is installed at the opposite end of this group of rotating shafts (405), and a pulley is installed at one end of the other group of pulleys, and a belt is installed between the two groups of pulleys.

10. A method for separating and recycling waste LCD polarizing films, comprising the waste LCD polarizing film separation and recycling device according to any one of claims 1 to 9, characterized in that: The processing steps are as follows: S1: preheating the waste screen to soften the glue between the layers inside it, then installing it into the fixing frame (304) and moving it downward through the connecting frame (302), so that the entire screen moves downward; S2: At this time, the crushing tooth disc (201) and the crushing shaft (204) are turned on, so that the waste screen can slide downward and slide along the surface of the crushing tooth disc (201), and at the same time, the crushing tooth disc (201) crushes it in layers, and finally the remaining part is crushed as a whole by the crushing shaft (204); S3: The crushed fragments fall into the screening box (001), and the polarizing film fragments are floated by the water source inside. At the same time, the water source containing the polarizing film fragments is transported to the filter box (404) through the rotation of the water frame (406), thereby completing the screening of the polarizing film fragments.

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