A continuous production apparatus for a highly oriented film

Abstract

This invention discloses a continuous production apparatus for highly oriented films, relating to the field of oriented film production. It includes a coating and extrusion mechanism, a shearing mechanism, a traction machine, a drying mechanism, and a winding mechanism arranged sequentially in the working order. The shearing mechanism includes a mounting frame, within which a three-axis robotic arm is mounted, and a wire saw is mounted on the three-axis robotic arm. The drying mechanism includes a hot air blower, with a U-shaped tube fixedly connected to its outlet pipe. Multiple air outlets are formed on the inner wall of the U-shaped tube. In this invention, the shearing mechanism, by employing a three-axis robotic arm and a wire saw, allows the wire saw to move along with the robotic arm during reciprocating motion, thereby generating a dense shearing flow field. This induces the film to align along the direction of the shearing flow field, ultimately obtaining a highly oriented structure and material.

Description

Technical Field

[0001] This invention relates to the field of orientation film production, and more particularly to a continuous production apparatus for highly orientation films. Background Technology

[0002] Liquid crystals are an intermediate phase between liquids and crystals, exhibiting macroscopic amorphous characteristics but a certain regularity in their microscopic arrangement. The morphology of liquid crystal building blocks is anisotropic, primarily including one-dimensional rod-like and two-dimensional disk-like shapes. Controlling the orientation of these building blocks is crucial to the optical, electrical, and magnetic properties of liquid crystals. External stimuli such as mechanical vibration, stirring, coating, and centrifugal rotation can generate shear forces, inducing the building blocks to align along the direction of the shear force. This orientation process has wide applications in high-performance fibers, displays, photonic crystals, thin films, and many other fields. However, current methods for controlling the shear force on the building blocks suffer from poor precision, particularly in the thickness direction (i.e., the direction perpendicular to the shear force), where the range of orientation induced by shear force is limited, and high-precision, continuous production equipment is lacking. Therefore, developing high-precision shear force control devices to achieve continuous production of highly oriented liquid crystal materials is an urgent problem to be solved. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous production apparatus for highly oriented films, which solves the technical problems of existing technologies such as the inability to align liquid crystals with high precision, low production efficiency, and lack of drying function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a continuous production apparatus for highly oriented films, characterized in that it includes a coating extrusion mechanism, a shearing mechanism, a traction machine, a drying mechanism, a winding mechanism, and a conveying mechanism arranged in sequence according to the working order;

[0005] The shearing mechanism includes a mounting frame, in which a three-axis robotic arm is mounted, and a wire saw is mounted on the three-axis robotic arm; the wire saw has saw wire.

[0006] The coating extrusion mechanism extrudes the graphene solution onto the substrate of the conveying mechanism to form a liquid film. Driven by the substrate, the liquid film enters the shearing mechanism and is sheared by the saw wire of the wire saw, so that the graphene sheets are oriented. Then it enters the drying mechanism to dry into a film and detaches from the substrate. The detached film is then wound up by the winding mechanism.

[0007] Preferably, the wire saw is equipped with screws for adjusting the tension of the saw wire.

[0008] Preferably, the saw wire is a straight saw wire or a serpentine saw wire; and the saw wire is perpendicular to the moving direction of the transmission mechanism. When it is a straight saw wire, the graphene oxide is horizontally oriented; when it is a serpentine saw wire, the graphene oxide is oriented along a serpentine curve.

[0009] Preferably, there are multiple saw wires fixed in parallel on the wire saw bracket, which can improve production efficiency.

[0010] Preferably, the saw wire is a straight saw wire, and the drying mechanism includes a hot air blower. A U-shaped tube is fixedly connected to the air outlet of the hot air blower. Multiple air outlets are opened on the inner wall of the U-shaped tube to dry the oriented liquid film with hot air and obtain a horizontally oriented graphene oxide film.

[0011] Preferably, the saw wire is a serpentine saw wire, and multiple saw wires are fixed in parallel on the wire saw bracket. The drying mechanism is a freeze-drying mechanism that freeze-dries the oriented liquid film to obtain an aerogel. The curvature of the serpentine saw wire can be adjusted by adjusting the screw, and the curvature gradually increases from top to bottom, forming a saw wire array with a curvature gradient. Different curvatures are beneficial for preparing a gradient graphene oxide film, thereby inducing the sheets to align along the gradient flow field. After freeze-drying, a graphene oxide aerogel film material with a pore density gradient is obtained, further enhancing the microwave absorption performance.

[0012] Preferably, the winding mechanism includes a fixed frame, an electric push rod is installed through one side of the fixed frame, a movable clamping plate is rotatably installed on the extension end of the electric push rod, a motor is installed on the other side of the fixed frame, the power output shaft of the motor passes through one side of the fixed frame and is rotatably connected to the fixed frame, and a fixed clamping plate is fixedly installed on the power output shaft of the motor.

[0013] Preferably, cylindrical protrusions are installed on the opposite sides of both the movable clamping plate and the fixed clamping plate.

[0014] Preferably, a fixing plate is fixedly connected to the fixing frame, and the hot air blower is mounted on the fixing plate.

[0015] Preferably, a plurality of brackets are installed on the top surface of the fixing plate, and the brackets are fixedly connected to the U-shaped tube.

[0016] Preferably, the bracket is Y-shaped, and there are four brackets, which are installed equidistantly on the top surface of the fixing plate.

[0017] Preferably, two support legs are installed on the top surface of both the fixing frame and the fixing plate.

[0018] Preferably, a hexagonal prism-shaped rotating head is installed at the end of the screw located outside the wire saw, and a rotating plate is rotatably installed at the end of the screw located inside the wire saw.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] 1. The shearing mechanism in this invention uses a three-axis robotic arm and a wire saw. When the three-axis robotic arm reciprocates, the wire saw moves with the three-axis robotic arm, thereby generating a dense horizontal shearing field, which facilitates the high-precision horizontal orientation of graphene oxide.

[0021] 2. By combining tension screws and a serpentine saw wire matrix, the continuous preparation of graphene aerogels with varying pore density gradients can be achieved, which is expected to yield porous materials with microwave absorption properties.

[0022] 3. The drying mechanism in this invention is equipped with a hot air blower, a U-shaped tube and an air outlet. By starting the hot air blower, hot air is delivered into the U-shaped tube. The hot air in the U-shaped tube is discharged through multiple air outlets. The discharged hot air blows towards the highly oriented film, thereby accelerating the drying of the oriented film.

[0023] 4. The winding mechanism in this invention is provided with a fixed frame, an electric push rod, a movable clamping plate, a motor and a fixed clamping plate. When the electric push rod is running, it will drive the movable clamping plate to move, thereby adjusting the distance between the movable clamping plate and the fixed clamping plate, so as to make it easier to clamp or loosen the roller by cooperating with the movable clamping plate and the fixed clamping plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the left-side structure of the shearing mechanism of the present invention;

[0026] Figure 3 This is a three-dimensional representation of the winding mechanism and drying mechanism of the present invention. Figure 1 ;

[0027] Figure 4 This is a three-dimensional representation of the winding mechanism and drying mechanism of the present invention. Figure 2 ;

[0028] Figure 5 This is a schematic diagram of the saw wire array with curvature gradient variation according to the present invention;

[0029] Figure 6 A schematic diagram of orientation induced by horizontal sawing wire (a); a cross-sectional view of a horizontally oriented graphene oxide aerogel membrane (b); a diagram of a horizontally oriented graphene membrane (c).

[0030] Figure 7 A cross-sectional view of the pore structure of the graphene oxide film obtained from a serpentine saw wire;

[0031] Reference numerals: 1. Coating and extrusion mechanism; 2. Shearing mechanism; 21. Mounting frame; 22. Three-axis robotic arm; 23. Wire saw; 24. Screw; 3. Traction machine; 4. Winding mechanism; 41. Fixed frame; 42. Electric actuator; 43. Movable clamping plate; 44. Motor; 45. Fixed clamping plate; 46. Fixed plate; 5. Drying mechanism; 51. Hot air blower; 52. U-shaped tube; 53. Air outlet; 54. Bracket; 6. Conveying mechanism. Detailed Implementation

[0032] To make the technical means, creative features, achieved objectives, and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention.

[0033] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] Examples, such as Figures 1-4 As shown, a continuous production apparatus for highly oriented films includes a coating extrusion mechanism 1, a shearing mechanism 2, a traction machine 3, a drying mechanism 5, and a winding mechanism 4 arranged in sequence according to the working order.

[0035] The coating extrusion mechanism 1 is used to extrude the graphene oxide solution onto the substrate of the conveying mechanism 6 to form a liquid film. Driven by the substrate, the liquid film enters the shearing mechanism 2. The shearing mechanism 2 includes a mounting frame 21, within which a three-axis robotic arm 22 is mounted. A wire saw 23 is mounted on the three-axis robotic arm 22. The three-axis robotic arm 22 consists of three frames, three lead screws, three lead screw nuts, and three drive motors. The lead screws are rotatably mounted within the frames, and the lead screw nuts are sleeved on the lead screws. The drive motors are mounted on the outer surface of the frames, and the power output shaft of the drive motors is connected to one end of the lead screws. During operation, the three-axis robotic arm 22 can adjust the X, Y, and Z axes of the wire saw 23. When the three-axis robotic arm 22 reciprocates, the wire saw 23 moves along with it, thereby generating a shearing field. By shearing at different heights X, a dense shearing field can be formed. As is common knowledge in the field, sheet-like graphene oxide is oriented parallel to the shear field; that is, the graphene oxide is oriented on the sliding surface of the saw blade. For example... Figure 6 In diagram a, the straight saw blade shears along the direction of the arrow, forming a shear field as shown in pink. The black sheet-like graphene oxide is oriented along this shear field. Figure 6b shows a schematic diagram of the product obtained after freeze-drying, where the horizontal orientation of the graphene oxide sheets is clearly visible. 6c shows a schematic diagram of the product obtained after hot air drying. Obviously, when the saw blade is serpentine, a wavy shear surface is formed, and the graphene oxide is oriented along the wavy shear field, ultimately yielding... Figure 7 The graphene material shown.

[0036] The wire saw 23 is equipped with a screw 24 for adjusting the tension of the saw wire. A hexagonal prism rotating head is installed at the end of the screw 24 outside the wire saw 23, and a rotating plate is rotatably installed at the end of the screw 24 inside the wire saw 23. By rotating the rotating head, the screw 24 is rotated and moved, thereby adjusting the length of the screw 24 inside the wire saw 23, and thus adjusting the tension of the saw wire.

[0037] The winding mechanism 4 includes a fixed frame 41. An electric push rod 42 is installed through one side of the fixed frame 41. A movable clamping plate 43 is rotatably installed on the extended end of the electric push rod 42. A motor 44 is installed on the other side of the fixed frame 41. The power output shaft of the motor 44 passes through one side of the fixed frame 41 and is rotatably connected to the fixed frame 41. A fixed clamping plate 45 is fixedly installed on the power output shaft of the motor 44. When the electric push rod 42 runs, it will drive the movable clamping plate 43 to move, thereby adjusting the distance between the movable clamping plate 43 and the fixed clamping plate 45, so as to facilitate the clamping of the roller used for winding the high-orientation film by cooperating with the movable clamping plate 43 and the fixed clamping plate 45.

[0038] A fixing plate 46 is fixedly connected to the fixing frame 41.

[0039] In this invention, the saw wire is a straight saw wire, and the wire saw 23 generates a dense horizontal shearing field, thereby facilitating high-precision horizontal orientation of graphene oxide. The drying mechanism 5 includes a hot air blower 51, which is mounted on a fixed plate 46. A U-shaped tube 52 is fixedly connected to the air outlet of the hot air blower 51. Multiple air outlets 53 are opened on the inner wall of the U-shaped tube 52. When the hot air blower 51 is running, it delivers hot air into the U-shaped tube 52, and the hot air inside the U-shaped tube 52 is discharged through the multiple air outlets 53. The discharged hot air can accelerate the drying of the highly oriented film.

[0040] In this invention, the saw wire is a serpentine spring saw wire, and the wire saw 23 generates a dense wavy shear field, thereby facilitating high-precision orientation of graphene oxide. The drying mechanism 5 is a freeze-drying mechanism, which freeze-dries the oriented liquid film to obtain an aerogel.

[0041] When a wire saw has multiple serpentine saw wires, the curvature of the serpentine saw wires can be adjusted by adjusting screw 24, with the curvature gradually increasing from top to bottom, forming a saw wire array with a curvature gradient, such as... Figure 5Different curvatures are beneficial for preparing gradient graphene oxide films, thereby inducing the sheets to be oriented along the gradient flow field. After freeze-drying by the drying mechanism 5, graphene oxide with a gradient pore density can be obtained, further enhancing the wave absorption performance.

[0042] Four brackets 54 are equidistantly installed on the top surface of the fixing plate 46. The brackets 54 are fixedly connected to the U-shaped tube 52. The brackets 54 are Y-shaped, and their vertical parts are fixedly connected to the fixing plate 46. Two support legs are installed on the top surfaces of both the fixing frame 41 and the fixing plate 46.

[0043] When producing high-orientation film using a continuous production apparatus: the roller for winding the high-orientation film is placed on the fixed frame 41, so that the roller is located between the movable clamping plate 43 and the fixed clamping plate 45. Then, the electric push rod 42 is activated, so that the electric push rod 42 drives the movable clamping plate 43 to move, thereby making the movable clamping plate 43 cooperate with the fixed clamping plate 45 to clamp the roller.

[0044] Then, the raw material is added into the coating extrusion mechanism 1. The coating extrusion mechanism 1 extrudes the graphene oxide solution onto the substrate of the conveying mechanism 6 to form a liquid film. Driven by the substrate, the liquid film enters the shearing mechanism 2 and is sheared by the saw wire of the wire saw 23, so that the graphene sheets are oriented. Then it enters the drying mechanism 5 to dry into a film and detaches from the substrate. The detached film is then wound up by the winding mechanism 4.

[0045] When passing through the shearing mechanism 2, the three-axis robotic arm 22 is activated to reciprocate, which in turn drives the wire saw 23 to reciprocate, thereby causing the wire saw 23 to generate a dense horizontal shearing field.

[0046] After winding is completed, the electric push rod 42 is activated, which drives the movable clamping plate 43 to move, thereby increasing the distance between the movable clamping plate 43 and the fixed clamping plate 45, making it easier to remove the roller with the highly oriented film wound on it.

[0047] Figure 6 The product shown in b is prepared using the following parameters: 0.1 wt% of graphene oxide dispersion is added to the coating and extrusion mechanism 1, which extrudes the graphene dispersion onto the PET substrate of the conveying mechanism 6 to form a smooth and flat liquid film with a thickness of 1 mm. The film then enters the shearing mechanism 2 and is sheared by the saw wire of the wire saw 23. The wire saw consists of a single tensioned horizontal filament. The height of the straight saw wire is adjusted by the robotic arm 22, with a spacing of 100 μm. Horizontal shearing is performed at each height to induce horizontal orientation of the graphene sheets. The film then enters the drying mechanism 5 for freeze drying to obtain a highly horizontally oriented graphene aerogel.

[0048] Figure 6The product shown in c is prepared using the following parameters: 6 wt% graphene oxide dispersion is added to the coating extrusion unit 1, which extrudes the graphene oxide solution onto the PET substrate of the conveying unit 6 to form a smooth, flat liquid film with a thickness of 10 mm. The film then enters the shearing unit 2 and is sheared by the saw wire of the wire saw 23. The wire saw consists of 10 tensioned horizontal filaments with a spacing of 100 μm. The mechanical arm 22 moves the wire saw horizontally, inducing the horizontal orientation of the graphene sheets. The film then enters the drying unit 5 for hot air drying and is wound up by the winding unit 4, finally yielding the product shown in c. Figure 6 The high-level oriented graphene film shown in c is a high-level oriented graphene film.

[0049] Figure 7 The product shown was prepared using the following parameters: 10 wt% graphene dispersion was added to the coating and extrusion mechanism 1, which extruded the graphene dispersion onto the PET substrate of the conveying mechanism 6 to form a smooth and flat liquid film with a thickness of 6 mm. The film then entered the shearing mechanism 2 and was sheared by the saw wire of the wire saw 23. The wire saw consisted of 10 wavy rigid filaments with a spacing of 200 μm. The tension screw was not adjusted to ensure that the curvature of the 10 wavy rigid filaments was consistent. The height of the wire saw was adjusted by the robotic arm 22, and the spacing of the filaments was 200 μm. Horizontal shearing was performed to generate a wavy shearing field that induced the graphene sheets to be oriented in a wavy shape. The film then entered the drying mechanism 5 for freeze drying to obtain a wavy-oriented graphene aerogel.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0051] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous production apparatus for highly oriented films, characterized in that: It includes a coating extrusion mechanism (1), a shearing mechanism (2), a traction machine (3), a drying mechanism (5), a winding mechanism (4), and a conveying mechanism (6) arranged in the working order. The shearing mechanism (2) includes a mounting frame (21), in which a three-axis robotic arm (22) is mounted, and a wire saw (23) is mounted on the three-axis robotic arm (22); the wire saw (23) has saw wire; The coating extrusion mechanism (1) extrudes the graphene oxide solution onto the substrate of the conveying mechanism (6) to form a liquid film. Driven by the substrate, the liquid film enters the shearing mechanism (2) and is sheared by the saw wire of the wire saw (23) to orient the graphene sheets. Then it enters the drying mechanism (5) to dry into a film and detaches from the substrate. The detached film is then wound up by the winding mechanism (4). The saw wire is a serpentine spring saw wire. The wire saw (23) generates a dense wavy line shearing field, and the saw wire is perpendicular to the moving direction of the conveying mechanism (6). The wire saw (23) is equipped with a screw (24) for adjusting the tension of the saw wire. By adjusting the screw (24), the curvature of the serpentine spring saw wire can be adjusted, and the curvature gradually increases from top to bottom, forming a saw wire array with a curvature gradient.

2. The continuous production apparatus according to claim 1, characterized in that: The saw wires are multiple and are fixed in parallel on the wire saw (23) bracket.

3. The continuous production apparatus according to claim 1, characterized in that: There are multiple saw wires, which are fixed in parallel on the support of the wire saw (23). The drying mechanism (5) is a freeze-drying mechanism that freeze-dries the oriented liquid film to obtain a highly oriented aerogel film.

4. The continuous production apparatus for highly oriented films according to claim 1, characterized in that: The winding mechanism (4) includes a fixed frame (41), an electric push rod (42) is installed through one side of the fixed frame (41), a movable clamping plate (43) is rotatably installed on the extension end of the electric push rod (42), a motor (44) is installed on the other side of the fixed frame (41), the power output shaft of the motor (44) passes through one side of the fixed frame (41) and is rotatably connected to the fixed frame (41), and a fixed clamping plate (45) is fixedly installed on the power output shaft of the motor (44).

5. The continuous production apparatus for highly oriented films according to claim 4, characterized in that: Cylindrical protrusions are installed on the opposite sides of both the movable clamp (43) and the fixed clamp (45).

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