A graphene film coating supply device

Abstract

The utility model discloses a kind of graphene film coating's feed device, it is related to slurry coating technical field, including feed system and coating system.Feed system contains at least two storage units, multi-pass switching device and conveying pipeline, storage unit is driven extrusion spare feed by driving member, multi-pass switching device realizes rotation feed to evade front-end process disturbance;Coating system contains pressure-equalizing device, cloth device and traction mechanism, pressure-equalizing device is balanced pressure by multi-point feeding, cloth device adjustable doctor knife controls coating thickness, traction mechanism pulls base material to move.The utility model solves the problem of uneven feeding and coating in the prior art, has the advantages of stable feeding, uniform coating and controllable thickness, improves the yield and quality consistency of graphene film products.

Description

Technical Field

[0001] This utility model belongs to the field of slurry coating technology, and in particular relates to a feeding device for graphene film coating. Background Technology

[0002] New materials such as thermally conductive films and conductive films made from graphene or graphene oxide have a wide range of applications. Thermally conductive films can be used for heat dissipation in smart electronic devices such as mobile phones, tablets, and LCD displays. Conductive fabrics and graphene composite materials can be used to make work clothes with special functions such as antistatic and heat protection for various harsh environments.

[0003] Graphene film materials and their composites are all made through a slurry preparation process followed by a coating process. Currently, the coating machines used in the industry employ a pump to extract the slurry and transfer it to the coating storage silo. Due to the high viscosity and poor fluidity of graphene slurry, using a pump to extract the slurry causes significant wear on the pump body. Using frequency converter control can easily lead to motor stalling, making it impossible to achieve a stable and continuous slurry supply process. Furthermore, the conventional storage silo design, due to the inherent characteristics of graphene slurry, results in uneven liquid levels in the storage silo, leading to unstable material output during the coating production process. This results in an uneven surface of the coated material with unremovable blemishes, affecting both the appearance of the material surface and the consistency of the material thickness.

[0004] In the prior art, Chinese patent document CN109467078A discloses a method for preparing a graphene thermally conductive film, and Chinese patent document CN202120191191.X discloses a coating and feeding system. Both methods involve preparing either a low-viscosity graphene slurry or powder, and then rolling to produce the corresponding product. Low-viscosity graphene slurry requires more dispersant, resulting in higher energy consumption for coating and drying processes to achieve the same product output. Furthermore, achieving significant thickness with low-concentration, low-viscosity graphene slurry leads to high production costs and low efficiency, failing to meet the demands of the mass market. Powder, prepared by rolling, suffers from poor internal bonding, resulting in products with poor tensile strength and bending resistance. Therefore, it is necessary to provide a device suitable for coating high-viscosity graphene. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a feeding device for graphene film coating, which solves the technical problems in current continuous production processes where the front-end process has a significant impact on the back-end process, and the slurry is difficult to achieve uniform thickness and a smooth surface. This invention can effectively solve the problems in the background technology.

[0006] This invention provides the following technical solution:

[0007] A feeding device for graphene film coating includes a feeding system and a coating system. The feeding system includes at least two storage units, a pneumatic three-way switching valve, and a third pipeline. Each storage unit has an extrusion head inside and a hydraulic rod outside to drive the extrusion head to move along the inner wall of the storage unit. The input end of the pneumatic three-way switching valve is connected to each storage unit, and the output end is connected to the third pipeline. The coating system includes a distribution pipe, a pressure equalization pipe, a storage box, a doctor blade, and a coating traction roller. The distribution pipe connects the third pipeline and the pressure equalization pipe, and the pressure equalization pipe is connected to the material distribution groove of the storage box via a spray pipe. The doctor blade is located on the upper side of the material distribution groove and is threadedly connected to the storage box via a screw. The coating traction roller is rotatably connected to a support via a bearing. The coating device is equipped with an adjusting component for adjusting the coating thickness on the substrate surface.

[0008] Preferably, the storage unit includes a storage tank 1 and a storage tank 2, which are connected to a pneumatic three-way switching valve via a pipeline 1. The first port of the pneumatic three-way switching valve is connected to the storage tank 1 via the pipeline 1, the second port is connected to the storage tank 2, and the third port is connected to the pipeline 3.

[0009] Preferably, one end of the diversion pipe is connected to the conveying pipe, and the other end is connected to the pressure equalization pipe; the pressure equalization pipe is connected to the material distribution trough in the material distribution device through at least one nozzle.

[0010] Preferably, the adjusting component is a scraper, which is located on the upper side of the fabric trough; the fabric device further includes an adjusting assembly, which includes a screw rotatably connected to the scraper, the screw being threadedly connected to the housing of the fabric device, and a knob being provided at the upper end of the screw.

[0011] Preferably, a pressure sensor is provided inside the shunt tube, and the signal output terminal of the pressure sensor is connected to an external control device or display device.

[0012] Preferably, the traction mechanism includes a coating traction roller, the two ends of which are rotatably connected to a bracket via bearings.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention discloses a feeding device for graphene film coating. It employs at least two storage units in conjunction with a multi-channel switching device to feed materials alternately, effectively avoiding intermittent disturbances in the upstream slurry preparation process, preventing gas from being introduced into the slurry, and improving feeding stability. A pressure equalization device and a multi-point feeding nozzle design balance the pressure within the material distribution tank, ensuring uniform slurry coating, a smooth surface, and reducing defects such as blemishes. An adjustable scraper enables precise control of coating thickness, adapting to different product requirements. A pressure sensor provides real-time pressure data feedback, facilitating dynamic adjustment of the drive component output and further ensuring feeding stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0023] Example

[0024] refer to Figure 1-4 A feeding device for graphene film coating includes a feeding system and a coating system. The feeding system includes at least two storage units, a pneumatic three-way valve, and a third pipeline. Each storage unit has an extrusion head inside and a hydraulic rod outside to drive the extrusion head to move along the inner wall of the storage unit. The input end of the pneumatic three-way valve is connected to each storage unit, and the output end is connected to the third pipeline. The coating system includes a distribution pipe, a pressure equalization pipe, a storage box, a doctor blade, and a coating traction roller. The distribution pipe connects the third pipeline and the pressure equalization pipe, and the pressure equalization pipe is connected to the material distribution groove of the storage box through a spray pipe. The doctor blade is located on the upper side of the material distribution groove and is threadedly connected to the storage box through a screw. The coating traction roller is rotatably connected to a support through a bearing. The coating device is equipped with an adjusting component for adjusting the coating thickness on the substrate surface.

[0025] The storage unit includes a storage tank 1 and a storage tank 2, connected to a pneumatic three-way switching valve via a pipe 1. The first port of the pneumatic three-way switching valve is connected to storage tank 1 via pipe 1, the second port is connected to storage tank 2, and the third port is connected to pipe 3. One end of the diversion pipe is connected to the conveying pipe, and the other end is connected to the pressure equalization pipe. The pressure equalization pipe is connected to the material distribution trough in the material distribution device via at least one nozzle. The adjusting component is a scraper, which is located on the upper side of the material distribution trough. The material distribution device also includes an adjusting assembly, which includes a screw rotatably connected to the scraper. The screw is threadedly connected to the housing of the material distribution device, and a knob is provided at the upper end of the screw. A pressure sensor is installed inside the diversion pipe, and the signal output end of the pressure sensor is connected to an external control device or display device. The traction mechanism includes a coating traction roller, the two ends of which are rotatably connected to a bracket via bearings.

[0026] As one possible implementation method, refer to Figure 1-2A graphene film coating and feeding device includes a pipe 6, the left end of which is connected to a feeding mechanism, which transports material into the pipe 6. The right end is connected to the lower end of a distribution pipe 7. The upper end of the distribution pipe 7 passes through a corresponding circular hole on the lower surface of a storage box 11, extends into the storage box 11, and connects to a pressure equalization pipe 8. The right side surface of the pressure equalization pipe 8 is connected to the left end of a spray pipe 9. A material feeding groove is formed on the right side surface of a scraper 13, and a coating traction roller 12 is provided on the right side of the material feeding groove. The front and rear ends of the traction roller 12 are rotatably connected to a bracket via bearings.

[0027] The nozzle 9 of this device adopts a multi-point feeding design, for reference... Figure 3-4 It can effectively balance the pressure in all parts of the material distribution trough, making the material distribution uniform and stable, improving the appearance of the wet film, and significantly increasing the product yield of the coating process. During operation, the coating substrate is first placed on the traction roller 12, and the raw material is squeezed into the pipe 6 through the feeding mechanism, sent to the pressure equalization pipe 8 through the diversion pipe 7, and then sprayed into the storage box 11 through the pressure equalization pipe 8. Subsequently, it is evenly squeezed onto the upper surface of the coating substrate through the material distribution trough. The traction roller 12 is rotated to make the substrate move gradually, achieving a more uniform coating.

[0028] One embodiment of the feeding mechanism is as follows: it includes a pneumatic three-way switching valve 5, the left end of pipe 3 6 is connected to its right port, the left port is connected to the right end of pipe 1 2, the upper end of pipe 1 2 is connected to storage tank 1, and the upper port of the pneumatic three-way switching valve 5 is connected to storage tank 2 3. Extrusion heads 15 are slidably connected inside storage tank 1 1 and storage tank 2 3 respectively, each with a hydraulic rod 4 on its upper side. The input ends of the two hydraulic rods 4 are electrically connected to the external power output terminal via an external control switch group, and their lower ends extend into the interior through the corresponding circular holes on the storage tanks, respectively, and are fixedly connected to the upper surface of the corresponding extrusion heads 15. The input end of the pneumatic three-way switching valve 5 is also electrically connected to the external power output terminal via an external control switch group.

[0029] Using two storage tanks can eliminate the disturbance of the discontinuous graphene slurry production process at the front end to the entire continuous coating material supply process. In continuous production, it is difficult to produce the slurry continuously at the front end. Intermittent transportation will cause nonlinearity of the pump in the storage tank, and frequent start-stop of the conveying equipment will easily introduce gas, reducing the yield of the coated film. However, the two storage tanks can supply the material in turn, which can effectively avoid this impact.

[0030] The device also includes a scraper 13, which is located inside the material storage box 11 on the upper side of the material tray. The upper part of the scraper 13 is rotatably connected to the lower end of the screws 14, which are respectively threaded into the corresponding screw holes on the upper surface of the material storage box 11. The upper end of the scraper 13 extends through the screw holes to the upper outer side of the material storage box 11 and is fixedly connected to the knob. The scraper 13, which can be adjusted up and down, can control the coating thickness and meet the coating process requirements of different products.

[0031] In addition, the device is equipped with a pressure sensor 10, which is installed on the upper part of the inner surface of the distributor 7. Its signal transmitting end is connected to the signal receiving end of an external controller (industrial computer). The pressure sensor 10 returns data to the control system, which can then adjust the output of the hydraulic extrusion.

[0032] In practical operation, the coating substrate is first placed on the traction roller 12. An external control switch group controls the two hydraulic rods 4 to alternately start, causing the two extrusion heads 15 to move alternately, allowing the storage tanks 1 and 3 to discharge material alternately. Simultaneously, the pneumatic three-way valve 5 is adjusted according to the material discharge. After the raw material is squeezed into pipe 3 6, it is sent to the pressure equalization pipe 8 via the diversion pipe 7, then sprayed into the storage box 11, and subsequently evenly squeezed onto the upper surface of the coating substrate through the material distribution trough. Rotating the traction roller 12 gradually moves the substrate to the right, making the coating more even on the contact surface, and excess material is scraped off by the scraper 13. Turning the knob controls the screw 14 to adjust the height of the scraper 13, and the output pressure of the hydraulic rod 4 is adjusted based on the data returned by the pressure sensor 10. It should be noted that in the above embodiment, the hydraulic rod 4 uses a Longxiang hydraulic rod, and the method of controlling the hydraulic rod 4 and the pneumatic three-way valve 5 through an external control switch group is a common approach in the prior art.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations; any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A feeding device for graphene film coating, characterized in that, The system includes a feeding system and a coating system, a traction mechanism, and a fabric application device. The feeding system includes at least two storage units, a pneumatic three-way switching valve (5), and a third pipeline (6). Each storage unit has an extrusion head (15) inside and a hydraulic rod (4) outside that drives the extrusion head to move along the inner wall of the storage unit. The input end of the pneumatic three-way switching valve (5) is connected to each storage unit, and the output end is connected to the third pipeline (6). The coating system includes a distribution pipe (7), a pressure equalization pipe (8), and a storage... Material box (11), scraper (13) and coating traction roller (12); the diversion pipe (7) connects the pipe three (6) and the pressure equalization pipe (8), and the pressure equalization pipe (8) is connected to the material trough of the storage box (11) through the spray pipe (9); the scraper (13) is located on the upper side of the material trough and is threadedly connected to the storage box (11) through the screw (14); the coating traction roller (12) is rotatably connected to the bracket through the bearing; the material feeding device is provided with an adjusting component for adjusting the coating thickness on the substrate surface.

2. The feeding device for graphene film coating according to claim 1, characterized in that, The storage unit includes storage tank one (1) and storage tank two (3), and is connected to a pneumatic three-way switching valve (5) through pipe one (2). The first port of the pneumatic three-way switching valve (5) is connected to storage tank one (1) through pipe one (2), the second port is connected to storage tank two (3), and the third port is connected to pipe three (6).

3. The feeding device for graphene film coating according to claim 1, characterized in that, One end of the diversion pipe (7) is connected to the conveying pipe, and the other end is connected to the pressure equalization pipe (8); the pressure equalization pipe (8) is connected to the material distribution trough in the material distribution device through at least one nozzle (9).

4. The feeding device for graphene film coating according to claim 1, characterized in that, The adjusting component is a scraper (13), which is located on the upper side of the fabric trough. The fabric device also includes an adjusting assembly, which includes a screw (14) rotatably connected to the scraper (13). The screw (14) is threadedly connected to the housing of the fabric device, and a knob is provided at the upper end of the screw (14).

5. The feeding device for graphene film coating according to claim 1, characterized in that, The shunt tube (7) is equipped with a pressure sensor (10), and the signal output terminal of the pressure sensor (10) is connected to an external control device or display device.

6. The feeding device for graphene film coating according to claim 1, characterized in that, The traction mechanism includes a coating traction roller (12), the two ends of which are rotatably connected to the bracket via bearings.

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