Continuous graphene heat dissipation film production device

Abstract

The utility model provides a continuous graphene heat dissipation film production device, which belongs to the technical field of material processing and comprises a conveying assembly and a shell arranged above the conveying assembly, a movable baffle is arranged in the shell and divides the shell into a coating chamber and a drying chamber, and the coating chamber and the drying chamber are communicated with each other. A plurality of groups of liftable polymer device assemblies are arranged in the coating chamber; a microwave generator is arranged in the drying chamber; the liftable polymer device assembly comprises a lifting device, a slurry injection port, a flow valve, a porous polymer body and a discharge port nozzle; the slurry injection port is connected with the lifting device, and the flow valve is arranged on the slurry injection port; the porous polymer body is communicated with the slurry injection port, and the discharge port nozzle is communicated with the porous polymer body; by means of the liftable polymer devices, the surface of the Al foil is evenly coated with the slurry, the multiple sets of liftable polymer devices can further achieve the supplementary coating effect, the using amount of the slurry is small in the production process, and then the production cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to material processing technical field, concretely relates to a continuous graphene heat dissipation film production device. BACKGROUND

[0002] Graphene heat dissipation film provides the best heat dissipation solution for intelligent high-end mobile phone chip with excellent heat conduction performance.

[0003] In prior art, the preparation method of graphene heat dissipation film can adopt CVD method and coating method. CVD method is a technology that carbon source occurs chemical reaction under gaseous condition and then deposits a solid graphene film on heated substrate, and its principle is that metal or nonmetal is used as substrate and catalyst, certain carrier gas and carbon source are introduced under high temperature and low pressure environment and are kept warm for certain time, and graphene film is deposited on substrate surface. The thickness of graphene heat dissipation film can be accurately controlled by adopting CVD method, but there are problems of high production cost and expensive equipment, and if graphene powder is used, cost can be greatly saved, so coating method is developed. Coating method is to use coating machine to apply graphene or graphene oxide slurry on Al foil, and then to obtain final product through drying and roll pressing densification treatment. Coating method is to use scraper for coating, and its shortcoming is that graphene heat dissipation film and Al foil are easily scratched, which affects product quality. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides a continuous graphene heat dissipation film production device, which aims at solving the problem of easy scratching of graphene heat dissipation film and Al foil in existing graphene film production.

[0005] The utility model is realized as follows:

[0006] A continuous graphene heat dissipation film production device, the production device includes:

[0007] The conveying assembly and the shell arranged above the conveying assembly, the shell is provided with a coating chamber and a drying chamber, a plurality of liftable polymer device assembly groups are arranged in the coating chamber, and a microwave generator is arranged in the drying chamber;

[0008] The liftable polymer device assembly group includes a lifting device, a slurry injection port, a flow valve, a porous polymer body and a discharge port nozzle; the slurry injection port is connected with the lifting device, and the flow valve is arranged on the slurry injection port; the porous polymer body is communicated with the slurry injection port, and the discharge port nozzle is communicated with the porous polymer body.

[0009] In addition, the continuous graphene film production device provided by the above technical scheme of the utility model can also have the following additional technical features:

[0010] Further, the movable baffle is arranged in the shell, and the shell 2 is divided into a coating chamber and a drying chamber by the movable baffle.

[0011] Further, the porous polymer body has a plurality of holes with a diameter of 0.5-2 μm.

[0012] Further, the discharge outlet nozzle is a rectangular flat mouth, and the width of the discharge outlet nozzle is 0.5-1 μm.

[0013] Further, the conveying assembly comprises a plurality of rollers and a conveying belt; the plurality of rollers are equidistantly arranged, and one of the rollers is provided with a driving device; and the conveying belt is sleeved on the plurality of rollers.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The present application sprays by using the liftable polymer device, controls the speed of slurry descending by controlling the flow valve, and then allows the slurry to flow into the discharge outlet nozzle slowly through the porous polymer body. The thickness of the heat dissipation film can be adjusted by the PLC control panel to adjust the height of the liftable polymer assembly, the discharge outlet nozzle does not contact the Al foil to avoid scratching, and a plurality of liftable polymer assemblies can not only be uniformly spread on the Al foil but also realize the effect of re-coating, so that the slurry is completely covered on the surface of the Al foil, the discharge outlet nozzle can make the slurry flow more concentrated and stable on the surface of the substrate, avoids material waste and poor coverage caused by irregular spraying, and further avoids waste of slurry and increase of production cost; the subsequent microwave drying assembly does not damage the structure of the graphene heat dissipation film when drying at low temperature (below 90 DEG C) by using microwaves, obtains a product with excellent quality, avoids hard agglomeration of graphene caused by conventional heating methods, forms scaly graphite, and thus reduces the heat conduction performance. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0017] Figure 1 It is a whole structure schematic view of a continuous graphene heat dissipation film production device.

[0018] Figure 2 It is a schematic view of a liftable polymer device.

[0019] In the diagram: 1. Conveying assembly; 11. Roller; 12. Conveyor belt; 2. Housing; 21. Movable baffle; 22. Coating chamber; 23. Drying chamber; 3. Liftable polymer device assembly; 32. Slurry inlet; 33. Flow valve; 34. Porous polymer body; 35. Discharge nozzle; 4. Microwave generator; 5. PLC control panel. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] A continuous graphene heat dissipation film production device, such as Figure 1 As shown, the production apparatus includes: a conveying assembly 1 and a housing 2 disposed above the conveying assembly 1. The housing 2 is provided with a coating chamber 22 and a drying chamber 23. Multiple sets of liftable polymer device assemblies 3 are disposed in the coating chamber 22, and a microwave generator 4 is disposed in the drying chamber 23.

[0022] like Figure 2 As shown, the liftable polymer device assembly 3 includes a lifting device (not shown in the figure), a slurry injection port 32, a flow valve 33, a porous polymer body 34, and a discharge nozzle 35; the slurry injection port 32 is connected to the lifting device, and the flow valve 33 is disposed on the slurry injection port 32; the porous polymer body 34 is connected to the slurry injection port 32, and the discharge nozzle 35 is connected to the porous polymer body 34.

[0023] By setting up two sets of microwave generators 4, the hard agglomeration of graphene caused by conventional heating methods is avoided, which forms flake-like graphite and thus reduces thermal conductivity.

[0024] Lifting devices fall within the scope of existing technology and can be implemented in various forms, including but not limited to electric push rods, pneumatic cylinders, and hydraulic rods. These devices can all achieve the expected lifting function, so their basic principles and structures will not be described in detail here.

[0025] By setting up multiple sets of liftable polymer device components 3, not only can the slurry be evenly spread onto the Al foil, but also the effect of touch-up coating can be achieved.

[0026] Optionally, such as Figure 1As shown, the shell 2 is provided with a movable baffle 21, and the shell 2 is divided into a coating chamber 22 and a drying chamber 23 by the movable baffle 21.

[0027] Preferably, the movable baffle 21 is made of nylon, and the movable baffle 21 is externally connected with a driving device, which can drive the movable baffle 21 to move, so that the conveying assembly 1 can drive the Al foil in the coating chamber 22 and the graphene heat dissipation film thereon to move into the drying chamber 23.

[0028] Optionally, as shown, Figure 2 The porous polymer body 34 is provided with 200-300 small holes with a diameter of 0.5-2 μm.

[0029] By providing the flow valve 33 and the porous polymer body 34 on the slurry injection port 32, the flow speed of the slurry can be controlled to ensure that it flows out stably and slowly, which not only helps to form a uniform coating, but also reduces slurry waste and production costs, and each small hole of the porous polymer body 34 serves as an independent discharge point, so that the slurry can flow out at the same time in a wider range.

[0030] Optionally, as shown, Figure 2 The discharge port nozzle 35 is a rectangular flat mouth, and the width of the discharge port nozzle 35 is 0.5-1 μm.

[0031] By the above-mentioned porous polymer body 34, the slurry can flow to every place of the discharge port nozzle 35, and then the discharge port nozzle 35 is designed as a rectangular flat mouth, so that the flowing slurry is wider but very thin, which makes the slurry spread on the Al foil in a more uniform way, reduces the phenomenon of local over-thickness or under-thickness, and avoids slurry, thereby ensuring the consistency and flatness of the entire coating. This has a direct impact on subsequent drying and performance; in addition, designing the discharge port nozzle 35 as a rectangular flat mouth with a width of 0.5-1 μm can make the slurry flow more concentrated and stable on the substrate surface, avoiding material waste and poor coverage caused by irregular spraying, thereby avoiding slurry waste and rising production costs.

[0032] Optionally, as shown, Figure 1 The conveying assembly 1 comprises: a plurality of rollers 11 and a conveying belt 12; the plurality of rollers 11 are arranged at equal intervals, and one of the rollers 11 is externally connected with a driving device; and the conveying belt 12 is sleeved on the plurality of rollers 11.

[0033] One of the rollers 11 is driven to rotate by the externally connected device, and the other rollers 11 are driven to rotate by the conveying belt 12, so that the Al foil on the conveying belt 12 can move with the conveying belt 12.

[0034] Preferably, the material of the conveying belt 12 is nylon material; the material of the roller 11 is hard plastic material, and the diameter is 30-50 cm; the material of the conveying belt 12 is nylon material, which has excellent chemical corrosion resistance and can resist various chemicals possibly contained in the graphene slurry, so that degradation or damage does not occur after long-term use, and the service life of the conveying belt 12 is prolonged.

[0035] Optionally, as shown in Figures 1-2 The PLC control panel 5 is connected with the lifting device, the flow valve 33, the movable baffle 21 and the microwave generator 4, respectively.

[0036] Implementation process: the Al foil is placed on the conveying belt 12 of the coating cavity 22 in advance, the Al foil is placed on the left side of the first group of liftable polymer assemblies 3, the plurality of liftable polymer assemblies 3 are controlled to descend to a certain position by the PLC control panel 5, so that the distance between the discharge port 35 and the Al foil is 10-20 μm, then the graphene slurry is filled into the slurry filling port 32, the flow valve 33 is controlled to a half-open state by the PLC control panel 5, the transmission assembly 1 is started at the same time, and the speed is controlled to be a certain speed, so that the slurry can be uniformly coated on the Al foil, when the movable baffle 21 is reached, the movable baffle 21 is removed, so that the coated Al foil enters the drying cavity 23, then the movable baffle 21 is lowered for drying treatment, the microwave generator 4 is started by the PLC control panel 5, and the drying time is 30-60 min; after drying, the product is directly taken out, and then the conventional rolling mill is used for rolling treatment at room temperature, the pressure is controlled to be 5-10 MPa, the Al foil is peeled off after rolling, and finally the graphene heat dissipation film product is obtained.

[0037] It should be noted that the specific model and specification of the flow valve 33, the microwave generator 4 and the PLC control panel 5 need to be selected and determined according to the actual specification of the device, so the detailed description is not given.

[0038] The above is only a preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A continuous graphene heat spreader film production apparatus, characterized by, The production device comprises: a conveying assembly (1) and a shell (2) arranged above the conveying assembly (1), a coating chamber (22) and a drying chamber (23) are arranged in the shell (2), a plurality of liftable polymer device assemblies (3) are arranged in the coating chamber (22), and a microwave generator (4) is arranged in the drying chamber (23); the liftable polymer device assembly (3) comprises a lifting device, a slurry injection port (32), a flow valve (33), a porous polymer body (34) and a discharge port nozzle (35); the slurry injection port (32) is connected with the lifting device, the flow valve (33) is arranged on the slurry injection port (32); the porous polymer body (34) is communicated with the slurry injection port (32), and the discharge port nozzle (35) is communicated with the porous polymer body (34).

2. The apparatus for continuous production of graphene heat dissipation film according to claim 1, characterized in that, The shell (2) is provided with a movable baffle (21), and the shell (2) is divided into the coating chamber (22) and the drying chamber (23) by the movable baffle (21).

3. The apparatus according to claim 1, wherein the apparatus is characterized by: The porous polymer body (34) is provided with 200-300 small holes with a diameter of 0.5-2 μm.

4. The apparatus according to claim 1, wherein The discharge port nozzle (35) is a rectangular flat mouth, and the width of the discharge port nozzle (35) is 0.5-1 μm.

5. The apparatus according to claim 1, wherein The conveying assembly (1) comprises: rollers (11), a plurality of the rollers (11) are arranged at equal intervals, and an external driving device is arranged on one of the rollers (11); a conveying belt (12) sleeved on the plurality of rollers (11).

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