An optical diffusion film and its fabrication method

Abstract

This invention relates to the field of diffusion film production technology, and more particularly to an optical diffusion film and its manufacturing method. The film includes a housing, a servo motor fixedly connected to the center of the top of the housing, a transmission seat B fixedly connected to the output end of the servo motor, the bottom end of the transmission seat B extending to the bottom end of the inner wall of the housing, and a transmission seat A rotatably connected to the outer side of the transmission seat B on the inner wall of the housing. A stirring assembly is provided at the bottom end of the transmission seat A. This invention integrates a crushing assembly and a stirring assembly to achieve material crushing and mixing, effectively preventing large, uncrushed particles from entering the mixing chamber, avoiding agglomeration or uneven dispersion, significantly improving raw material utilization and slurry uniformity. Furthermore, the stirring assembly adopts a combined motion mode of the transmission seat B and transmission seat A, and is coordinated with multi-layered staggered stirring rods to form a strong convection and high shear force field, ensuring that the diffused particles are highly dispersed in the resin matrix, thus improving the uniformity of particle distribution in the optical diffusion film.

Description

Technical Field

[0001] This invention relates to the field of diffusion film production technology, and in particular to an optical diffusion film and its manufacturing method. Background Technology

[0002] With the development of science and technology and society, components in various aspects have been greatly improved. The diffusion film, also known as the separation film, is a metal film with a microporous structure. It is mainly used in the backlight source of LCD modules and is mostly made of sintered nickel. In the production process, a raw material stirring device is generally required to stir the raw materials so that they can dissolve better and increase the rate.

[0003] For example, patent number CN220861288U discloses a raw material stirring device for diffusion membrane production. By incorporating a tumbling assembly, a second motor, driven by the transmission of various components, rotates a second and third rotating shaft. This causes multiple second stirring rods on the outer walls of these shafts to rotate, tumbling the raw material located below the mixing tank to the top. This ensures thorough mixing of the raw material with water, improving stirring and mixing efficiency and preventing the raw material from settling to the bottom. This solves the problem of existing raw material stirring devices for diffusion membrane production that rely solely on a stirring motor to drive the stirring rods, which easily creates vortices at the center of the mixing, causing the raw material to settle and resulting in low stirring efficiency and poor performance. For example, patent number CN211677414U discloses a raw material stirring device for diffusion membrane production. With the structure described in this invention, a crushing roller is installed below the feed inlet, causing the raw material entering the mixing tank to be crushed by the roller, effectively crushing particles into powder and accelerating the stirring and dissolving process. A bushing with stirring blades is elastically connected below the rotating shaft, and a top plate driven by a cylinder is installed below the bushing. The top plate allows the bushing to slide up and down during stirring, resulting in superior stirring effect. Overall, this invention provides excellent stirring effect and high efficiency, preventing incomplete dissolution of particles in the raw material, ensuring the quality of the diffusion membrane, and improving production efficiency.

[0004] However, most existing diffusion film production devices use a single rotating shaft or a stirring method that reciprocates up and down, which cannot form strong shear and sufficient convection in three-dimensional space. As a result, micron-sized diffusion particles are still prone to agglomeration in high-viscosity resin systems, affecting the uniformity of optical performance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an optical diffusion film and its manufacturing method. It solves the problem that most existing diffusion film production devices use a single rotating shaft or a stirring method with reciprocating motion, which cannot form strong shear and sufficient convection in three-dimensional space. This results in micron-sized diffusion particles easily agglomerating in high-viscosity resin systems, affecting the uniformity of optical performance.

[0006] The technical solution of this invention is as follows: an optical diffusion film and its manufacturing method, comprising a device housing, a servo motor fixedly connected to the center of the top of the device housing, a transmission seat B fixedly connected to the output end of the servo motor, the bottom end of the transmission seat B extending to the bottom end of the inner wall of the device housing, a transmission seat A rotatably connected to the outer side of the transmission seat B on the inner wall of the device housing, a stirring assembly provided at the bottom end of the transmission seat A for stirring the raw materials on the inner wall of the device housing, and a feed seat fixedly connected to one side of the servo motor at the top of the device housing, the inner wall of the feed seat... A crushing component is provided for pre-crushing materials. The mixing component includes rotating rods A, B, and C, which are sequentially located at the bottom of transmission base A. A transmission ring is located on the outer side of rotating rod A. A transmission gear is located on one side of the transmission ring, on the inner wall of the device housing. The transmission gear meshes with the transmission ring. When the servo motor, in conjunction with transmission base B, drives transmission base A to rotate, the transmission gear contacts the transmission ring, thereby causing rotating rod A to rotate at the bottom of transmission base A. Both rotating rods B and C have a drive wheel B at their top ends. One drive wheel B has a drive belt B at both ends on its inner side, and the two drive belts B extend to the inner sides of the other two drive wheels B. When rotating rod A rotates, the drive wheel B at the top of rotating rod A, in conjunction with the drive belts B, drives rotating rod B and rotating rod C to rotate. The crushing assembly includes a crushing roller A, with crushing rollers B on both sides of crushing roller A. One end of both crushing roller A and crushing roller B has a drive wheel A. One drive wheel A has a drive belt A at both ends on its inner side, and the two drive belts B extend to the inner sides of the other two drive wheels B. One transmission belt A extends to the inner side of the other two transmission wheels A. When the crushing roller A rotates, the crushing roller A, together with the transmission wheel A and the transmission belt A, drives the crushing roller B to rotate. One end of the crushing roller A is provided with a transmission rod, one end of which extends to the opposite side of the transmission seat A and the transmission seat B. The transmission rod meshes with the transmission seat A and the transmission seat B. When the servo motor drives the transmission seat B to rotate, the transmission seat B, together with the transmission rod, drives the transmission seat A to rotate in the opposite direction inside the outer shell of the device. Meanwhile, the transmission rod drives the crushing roller A to rotate inside the feed seat.

[0007] Preferably, heat dissipation fins are fixedly connected to the outer side of the device housing, a water inlet is provided on the top of the device housing on the other side of the servo motor, and a discharge seat is provided at the bottom of the device housing. The feeding seat, water inlet and discharge seat are all connected to the device housing. Control valves are provided on the inner side of the feeding seat, water inlet and discharge seat, so that materials and water can be input through the feeding seat and water inlet respectively.

[0008] Preferably, a control panel is fixedly connected to the front end of the device housing. The control panel is electrically connected to the control valve and the servo motor. When the device is powered on, the control valve and the servo motor can be controlled through the control panel.

[0009] Preferably, a through hole is provided at the center of the transmission seat A, and the bottom end of the transmission seat B extends through the through hole to the bottom end of the inner wall of the device housing.

[0010] Preferably, the crushing roller A and the transmission rod are an integral structure. A bevel gear is provided at one end of the transmission rod and at the intersection of the transmission seat A and the transmission seat B with the transmission rod. When the servo motor drives the transmission seat B to rotate, the transmission seat B, in conjunction with the bevel gear, drives the transmission rod to rotate, and the transmission rod, in conjunction with the bevel gear, drives the transmission seat A to rotate.

[0011] Preferably, there are two crushing rollers B, which are distributed on both sides of crushing roller A. Crushing blades are provided on the outer sides of both crushing roller A and crushing roller B, and the crushing blades on the outer sides of crushing roller A and crushing roller B are arranged in an alternating manner.

[0012] Preferably, a rotating groove is provided above the rotating rods A, B, and C at the bottom end of the transmission seat A, and the top ends of the rotating rods A, B, and C extend to the inner side of the rotating groove. When the rotating rods A, B, and C rotate, they rotate inside the rotating groove.

[0013] Preferably, stirring rods are provided on both sides of the transmission seat B and the rotating rods A, B and C, and the stirring rods on both sides of the transmission seat B and the rotating rods A, B and C are arranged in an alternating manner.

[0014] The beneficial effects of this invention are: The optical diffusion film and its manufacturing method integrate a crushing component and a stirring component to achieve material crushing and mixing, effectively preventing large, uncrushed particles from entering the mixing chamber, avoiding agglomeration or uneven dispersion, significantly improving raw material utilization and slurry uniformity. Furthermore, the stirring component adopts a composite motion mode of transmission seat B and transmission seat A, and is equipped with multi-layer staggered stirring rods to form a strong convection and high shear force field, ensuring that the diffused particles are highly dispersed in the resin matrix, thereby improving the uniformity of particle distribution in the optical diffusion film. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural illustration of the present invention. Figure 1 , Figure 2 The diagram shown is a three-dimensional structural illustration of the present invention. Figure 2 , Figure 3 The diagram shown is a structural schematic of the transmission seat A and transmission seat B of the present invention. Figure 4 The diagram shown is a schematic representation of the internal structure of the feed seat of the present invention.

[0016] Explanation of reference numerals in the attached drawings: 1. Device housing; 2. Control panel; 3. Feed seat; 4. Water inlet seat; 5. Servo motor; 6. Heat dissipation fins; 7. Discharge seat; 8. Transmission seat A; 9. Transmission seat B; 10. Rotating rod A; 11. Rotating rod B; 12. Rotating rod C; 13. Transmission gear; 14. Transmission ring; 15. Stirring rod; 16. Transmission rod; 17. Bevel gear; 18. Crushing roller A; 19. Crushing roller B; 20. Transmission wheel A; 21. Transmission belt A; 22. Transmission wheel B; 23. Transmission belt B. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-4This invention provides an embodiment of an optical diffusion film and its manufacturing method, comprising a device housing 1, a servo motor 5 fixedly connected to the center of the top of the device housing 1, a transmission seat B9 fixedly connected to the output end of the servo motor 5, the bottom end of the transmission seat B9 extending to the bottom end of the inner wall of the device housing 1, a transmission seat A8 rotatably connected to the outer side of the transmission seat B9 located on the inner wall of the device housing 1, a stirring assembly provided at the bottom end of the transmission seat A8 for stirring the raw materials on the inner wall of the device housing 1, a feeding seat 3 fixedly connected to one side of the servo motor 5 located at the top of the device housing 1, a crushing assembly provided on the inner wall of the feeding seat 3 for crushing the material. The pre-crushing process involves a mixing assembly comprising rotating rods A10, B11, and C12. These three rods are sequentially positioned at the bottom of the transmission base A8. A transmission ring 14 is located on the outer side of rotating rod A10. A transmission gear 13 is positioned on one side of the transmission ring 14, located on the inner wall of the outer casing 1. The transmission gear 13 meshes with the transmission ring 14. When the servo motor 5, in conjunction with the transmission base B9, drives the transmission base A8 to rotate, the transmission gear 13 contacts the transmission ring 14, thereby causing rotating rod A10 to rotate at the bottom of the transmission base A8. The rotating rods A10, B11, and C12... Both the top of the rotating rod A10 and the rotating rod C12 are equipped with drive wheels B22. Drive belts B23 are installed at both ends of the inner side of one of the drive wheels B22, extending to the inner sides of the other two drive wheels B22. When the rotating rod A10 rotates, the drive wheels B22 at the top of the rotating rod A10, in conjunction with the drive belts B23, drive the rotating rods B11 and C12 to rotate. The crushing assembly includes a crushing roller A18, with crushing rollers B19 on both sides of the crushing roller A18. A drive wheel A20 is installed at one end of both the crushing rollers A18 and B19. Drive belts A21 are installed at both ends of the inner side of one of the drive wheels A20, extending to the inner sides of the other two drive wheels B22. A21 extends to the inner side of the other two transmission wheels A20. When the crushing roller A18 rotates, the crushing roller A18, together with the transmission wheel A20 and the transmission belt A21, drives the crushing roller B19 to rotate. One end of the crushing roller A18 is provided with a transmission rod 16. One end of the transmission rod 16 extends to the opposite side of the transmission seat A8 and the transmission seat B9. The transmission rod 16 meshes with the transmission seat A8 and the transmission seat B9. When the servo motor 5 drives the transmission seat B9 to rotate, the transmission seat B9, together with the transmission rod 16, drives the transmission seat A8 to rotate in the opposite direction inside the outer casing 1 of the device. Meanwhile, the transmission rod 16 drives the crushing roller A18 to rotate inside the feed seat 3.

[0019] Please see Figures 1-2In this embodiment, heat dissipation fins 6 are fixedly connected to the outer side of the device housing 1. A water inlet seat 4 is provided on the top of the device housing 1 on the other side of the servo motor 5. A discharge seat 7 is provided at the bottom of the device housing 1. The feeding seat 3, water inlet seat 4, and discharge seat 7 are all connected to the device housing 1. Control valves are provided on the inner sides of the feeding seat 3, water inlet seat 4, and discharge seat 7. Materials and water can be transported through the feeding seat 3 and water inlet seat 4, respectively. A control panel 2 is fixedly connected to the front end of the device housing 1. The control panel 2, control valves, and servo motor 5 are all... Electrically connected, when the device is powered on, the control valve and servo motor 5 can be controlled via the control panel 2. The servo motor 5 is a variable frequency speed control motor. The control panel 2 can set multiple stirring programs, including low-speed premixing, high-speed dispersion and slow defoaming stages, to adapt to the process requirements of different optical diffusion film formulations. The water inlet 4 is connected to a constant temperature water tank through a pipe. The outlet end of the discharge seat 7 is equipped with a pressure sensor and a viscosity meter. The detection signal is fed back to the control panel 2 for real-time adjustment of stirring time, speed and water addition to ensure that the slurry reaches the preset process parameters.

[0020] Please see Figures 3-4 In this embodiment, a through hole is provided at the center of the transmission seat A8, and the bottom end of the transmission seat B9 extends through the through hole to the bottom end of the inner wall of the device housing 1. The crushing roller A18 and the transmission rod 16 are integral structures. A bevel gear 17 is provided at one end of the transmission rod 16 and at the intersection of the transmission seat A8 and the transmission seat B9 with the transmission rod 16. When the servo motor 5 drives the transmission seat B9 to rotate, the transmission seat B9, in conjunction with the bevel gear 17, drives the transmission rod 16 to rotate, and the transmission rod 16, in conjunction with the bevel gear 17, drives the transmission seat A8 to rotate. There are two crushing rollers B19, which are distributed on both sides of the crushing roller A18. Crushing blades are provided on the outer sides of both the crushing roller A18 and the crushing roller B19. The crushing blades on the outer sides of the crushing roller A18 and the crushing roller B19 are arranged in an alternating pattern. Rotating rods A10, B11, and C12 are also provided. A rotating groove is provided at the bottom of the transmission seat A8 above the rotating rod A10. The top ends of the rotating rods A10, B11 and C12 extend to the inside of the rotating groove. When the rotating rods A10, B11 and C12 rotate, they rotate inside the rotating groove. Stirring rods 15 are provided on both sides of the transmission seat B9 and the rotating rods A10, B11 and C12. The stirring rods 15 on both sides of the transmission seat B9 and the rotating rods A10, B11 and C12 are staggered. The stirring rods 15 are distributed in multiple layers along the axial direction of the transmission seat B9 and the rotating rods A10, B11 and C12, and the stirring rods 15 in adjacent layers are staggered in the circumferential direction to enhance the convection and shearing effect of the material in the vertical direction and improve the mixing uniformity.

[0021] During operation, the power is turned on, the device is started, and the control valve of the feed seat 3 is opened. Solid raw materials such as diffusion particles and resin particles are fed into the feed seat 3. The servo motor 5 is started, and its output end drives the transmission seat B9 to rotate. The transmission seat B9 drives the transmission rod 16 to rotate through the bevel gear 17, which in turn drives the crushing roller A18 to rotate. The crushing roller A18 drives the crushing rollers B19 on both sides to rotate in opposite directions through the transmission wheel A20 and the transmission belt A21. The crushing blades of the three sets of crushing rollers A18 and B19 are arranged in a staggered manner to shear and squeeze the material, achieving efficient pre-crushing and preventing large particles from entering the mixing chamber. Then, the control panel 2 opens the control valve of the water inlet seat 4, and the temperature-controlled water in the external constant temperature water tank is injected into the device shell 1 through the water inlet seat 4. The servo motor 5 continues to run, and the transmission seat B9 revolves. At the same time, the bevel gear drives the crushing rollers B19 to rotate in opposite directions. 17. Drive transmission base A8 rotates in the opposite direction. Transmission base A8 drives the bottom rotating rods A10, B11, and C12 to revolve as a whole. During the revolution, the transmission ring 14 on the outer side of rotating rod A10 meshes with the transmission gear 13 fixed to the inner wall of the housing, causing rotating rod A10 to rotate. Rotating rod A10 is linked to rotating rods B11 and C12 to rotate synchronously through the transmission wheel B22 and transmission belt B23 at the top. At this time, transmission base B9 and the three rotating rods drive the stirring rods 15 on both sides to move, forming a compound stirring field: transmission base B9 provides central main stirring, the three rotating rods provide planetary orbital + rotational stirring, and the multi-layered staggered stirring rods 15 enhance axial convection and radial shear. Meanwhile, control panel 2 adjusts the speed of servo motor 5 in stages according to the preset program: low-speed premixing stage, such as 200–400. rpm: Initially wets the powder with water to prevent dust and clumping. High-speed dispersion stage (1000–2000 rpm): Strong shearing breaks up agglomerates, ensuring uniform dispersion of diffused particles. Slow defoaming stage (100–300 rpm): Reduces rotation speed to decrease bubble entrainment and promotes the rise and collapse of residual bubbles. Online monitoring and closed-loop control: When the slurry reaches the target process parameters, control panel 2 issues a discharge command, opening the control valve of discharge seat 7, and the slurry is completely discharged under gravity. Compared to the prior art document CN220861288U, which describes a raw material stirring device for diffusion membrane production, this device incorporates a tumbling assembly. A second motor, driven by the transmission of various components, rotates a second and third rotating shaft, causing multiple second stirring rods on their outer walls to rotate. This tumbles the raw material from the bottom of the mixing tank to the top, ensuring thorough mixing with water, improving stirring and mixing efficiency, and preventing the raw material from settling to the bottom. This solves the problem of the aforementioned raw material stirring device for diffusion membrane production, which relies solely on a stirring motor to drive the stirring rods to rotate, easily creating a vortex at the center of the mixing, causing the raw material to settle to the bottom, resulting in low stirring efficiency and poor performance. CN211677414U describes a raw material mixing device for diffusion membrane production. With the structure described in this invention, a crushing roller is installed below the feed inlet, causing the raw material entering the mixing tank to be crushed in the middle of the roller. This effectively crushes the particles in the raw material into powder, accelerating the mixing and dissolution process. A bushing with stirring blades is elastically connected below the rotating shaft, and a top plate driven by a cylinder is installed below the bushing. The top plate allows the bushing to slide up and down during the mixing process, resulting in a superior mixing effect. Overall, this invention provides excellent mixing performance and high efficiency, preventing incomplete dissolution of particles in the raw material, ensuring the quality of the diffusion membrane, and improving production efficiency. This application integrates a crushing component and a stirring component to achieve material crushing and mixing, effectively preventing large, uncrushed particles from entering the mixing chamber, avoiding agglomeration or uneven dispersion, significantly improving raw material utilization and slurry uniformity. Furthermore, the stirring component adopts a composite motion mode of transmission seat B and transmission seat A, and is equipped with multi-layered staggered stirring rods to form a strong convection and high shear force field, ensuring that diffused particles are highly dispersed in the resin matrix and improving the uniformity of particle distribution in the optical diffusion film.

[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An optical diffusion film, comprising a device housing (1), characterized in that: A servo motor (5) is fixedly connected to the center of the top of the device housing (1). A transmission seat B (9) is fixedly connected to the output end of the servo motor (5). The bottom end of the transmission seat B (9) extends to the bottom end of the inner wall of the device housing (1). A transmission seat A (8) is rotatably connected to the outer side of the transmission seat B (9) on the inner wall of the device housing (1). A stirring assembly is provided at the bottom end of the transmission seat A (8). The stirring assembly is used to stir the raw materials on the inner wall of the device housing (1). A feeding seat (3) is fixedly connected to one side of the servo motor (5) at the top of the device housing (1). A crushing assembly is provided on the inner wall of the feeding seat (3). The crushing assembly is used to pre-crush the materials. The stirring assembly includes rotating rod A (10), rotating rod B (11), and rotating rod C (12). Rotating rod A (10), rotating rod B (11), and rotating rod C (12) are sequentially distributed at the bottom end of the transmission seat A (8). A transmission ring (14) is provided on the outer side of rotating rod A (10). A transmission gear (13) is provided on one side of the transmission ring (14) located on the inner wall of the device housing (1). The transmission gear (13) meshes with the transmission ring (14). When the servo motor (5) cooperates with the transmission seat B (9) to drive the transmission seat A (8) to rotate, the transmission gear (13) meshes with the transmission ring (14). The contact causes the rotating rod A (10) to rotate at the bottom of the transmission seat A (8). The top ends of the rotating rods A (10), B (11), and C (12) are all equipped with transmission wheels B (22). One of the transmission wheels B (22) has transmission belts B (23) at both ends on its inner side. The two transmission belts B (23) extend to the inner sides of the other two transmission wheels B (22). When the rotating rod A (10) rotates, the transmission wheel B (22) at the top of the rotating rod A (10) and the transmission belt B (23) drive the rotating rods B (11) and C (12) to rotate respectively. The crushing assembly includes a crushing roller A (18), and crushing rollers B (19) are provided on both sides of the crushing roller A (18). A drive wheel A (20) is provided at one end of both the crushing roller A (18) and the crushing roller B (19). A drive belt A (21) is provided at both ends of the inner side of one of the drive wheels A (20). The two drive belts A (21) extend to the inner sides of the other two drive wheels A (20). When the crushing roller A (18) rotates, the crushing roller A (18) cooperates with the drive wheel A (20) and the drive belt A (21) to drive the crushing roller B (19) to move forward. The crushing roller A (18) is rotated. One end of the crushing roller A (18) is provided with a transmission rod (16). One end of the transmission rod (16) extends to the side of the opposite face of the transmission seat A (8) and the transmission seat B (9). The transmission rod (16) meshes with the transmission seat A (8) and the transmission seat B (9). When the servo motor (5) drives the transmission seat B (9) to rotate, the transmission seat B (9) cooperates with the transmission rod (16) to drive the transmission seat A (8) to rotate in the opposite direction inside the outer shell (1) of the device. Meanwhile, the transmission rod (16) drives the crushing roller A (18) to rotate inside the feed seat (3).

2. The optical diffusion film according to claim 1, characterized in that: Heat dissipation fins (6) are fixedly connected to the outer side of the device housing (1). A water inlet seat (4) is provided on the top of the device housing (1) on the other side of the servo motor (5). A discharge seat (7) is provided at the bottom of the device housing (1). The feed seat (3), water inlet seat (4) and discharge seat (7) are all connected to the device housing (1). Control valves are provided on the inner side of the feed seat (3), water inlet seat (4) and discharge seat (7). Materials and water can be input through the feed seat (3) and water inlet seat (4) respectively.

3. The optical diffusion film according to claim 1, characterized in that: The front end of the device housing (1) is fixedly connected to a control panel (2). The control panel (2) is electrically connected to the control valve and the servo motor (5). When the device is powered on, the control valve and the servo motor (5) can be controlled through the control panel (2).

4. The optical diffusion film according to claim 1, characterized in that: A through hole is provided at the center of the transmission seat A (8), and the bottom end of the transmission seat B9 extends through the through hole to the bottom end of the inner wall of the device housing (1).

5. An optical diffusion film according to claim 1, characterized in that: The crushing roller A (18) and the transmission rod (16) are integrated. A bevel gear (17) is provided at one end of the transmission rod (16) and at the intersection of the transmission seat A (8) and the transmission seat B (9) with the transmission rod (16). When the servo motor (5) drives the transmission seat B (9) to rotate, the transmission seat B (9) cooperates with the bevel gear (17) to drive the transmission rod 16 to rotate, and the transmission rod (16) cooperates with the bevel gear (17) to drive the transmission seat A (8) to rotate.

6. An optical diffusion film according to claim 1, characterized in that: There are two crushing rollers B (19), which are distributed on both sides of crushing roller A (18). Crushing blades are provided on the outer side of crushing roller A (18) and crushing roller B (19), and the crushing blades on the outer side of crushing roller A (18) and crushing roller B (19) are arranged in an alternating manner.

7. An optical diffusion film according to claim 1, characterized in that: A rotating groove is provided above the rotating rods A (10), B (11) and C (12) at the bottom of the transmission seat A (8). The tops of the rotating rods A (10), B (11) and C (12) extend to the inside of the rotating groove. When the rotating rods A (10), B (11) and C (12) rotate, they rotate inside the rotating groove.

8. An optical diffusion film according to claim 1, characterized in that: Stirring rods (15) are provided on both sides of the transmission seat B (9) and the rotating rods A (10), B (11) and C (12), and the stirring rods (15) on both sides of the transmission seat B (9) and the rotating rods A (10), B (11) and C (12) are arranged in an alternating manner.

9. A method for fabricating an optical diffusion film, characterized in that: The detachable and replaceable multi-section combined D-pillar assembly according to any one of claims 1-8 is specifically operated as follows: S1: Connect the power supply, start the device, open the control valve of the feed seat (3), and put solid raw materials such as diffusion particles and resin particles into the feed seat (3). Start the servo motor (5), and its output end drives the transmission seat B (9) to rotate. The transmission seat B (9) drives the transmission rod (16) to rotate through the bevel gear (17), which in turn drives the crushing roller A (18) to rotate. The crushing roller A (18) drives the crushing rollers B (19) on both sides to rotate in opposite directions through the transmission wheel A (20) and the transmission belt A (21). The crushing blades of the three sets of crushing rollers A (18) and crushing rollers B (19) are arranged in a staggered manner on the outside to shear and squeeze the material, realize efficient pre-crushing, and prevent large particles from entering the mixing chamber. S2: Then the control panel (2) opens the control valve of the water inlet seat (4), and the temperature-controlled water in the external constant temperature water tank is injected into the device housing (1) through the water inlet seat (4). The servo motor (5) continues to run, and the transmission seat B (9) revolves. At the same time, the transmission seat A (8) is driven to rotate in the opposite direction through the bevel gear (17). The transmission seat A (8) drives the bottom rotating rod A (10), rotating rod B (11), and rotating rod C (12) to revolve as a whole. During the revolution, the transmission ring (14) on the outside of the rotating rod A (10) and the ring fixed to the inner wall of the housing are connected. The transmission gear (13) meshes, causing the rotating rod A (10) to rotate. The rotating rod A (10) is linked by the transmission wheel B (22) at the top and the transmission belt B (23) to rotate the rotating rods B (11) and C (12) synchronously. At this time, the transmission seat B (9) and the three rotating rods drive the stirring rods (15) on both sides of their respective sides to move, forming a composite stirring field. The transmission seat B (9) provides the central main stirring, and the three rotating rods provide planetary circumferential and self-rotating stirring. The multi-layered staggered stirring rods (15) enhance axial convection and radial shear. S3: The control panel (2) adjusts the speed of the servo motor (5) in stages according to the preset program. In the low-speed premixing stage, such as 200–400 rpm, the powder and water are initially moistened to avoid dust and agglomeration. In the high-speed dispersion stage, such as 1000–2000 rpm, the agglomerates are strongly sheared and broken up to ensure that the diffused particles are evenly dispersed. In the slow defoaming stage, such as 100–300 rpm, the speed is reduced to reduce the entrainment of bubbles and promote the floating and breaking of residual bubbles. Online monitoring and closed-loop control are used. When the slurry reaches the target process parameters, the control panel (2) issues a discharge command and opens the control valve of the discharge seat (7). The slurry is completely discharged under the action of gravity.

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