Silver nanowire transparent conductive film coating machine

Abstract

The invention provides a silver nanowire transparent conductive film coating machine which comprises an unwinding machine, a coating pool, a drying pool, a cooling pool and a winding machine, and the unwinding machine is suitable for assembling a transparent film coiled material; the coating pool is suitable for containing silver nanowire suspension liquid, the interior of the coating pool is connected with a guide roller and an extrusion roller set, the guide roller is arranged below the liquid level, and the extrusion roller set is arranged above the liquid level; a drying roller group is arranged in the drying pool so as to dry the coated transparent film; an opening is formed in the upper portion of the cooling pond, and a cooling roller set is arranged in the cooling pond so as to cool the dried transparent film; and the winding machine is connected with the driving device so as to wind the prepared silver nanowire transparent conductive film. The adhesive force of the suspension liquid on the transparent film can be improved, the redundant suspension liquid on the transparent film can fall into the coating pool through extrusion of the extrusion roller set, the suspension liquid is prevented from being wasted, and meanwhile the situation that the redundant suspension liquid drips onto other equipment outside the coating pool or the ground, and consequently the working environment is polluted is also prevented.

Description

Technical Field

[0001] The invention relates to the technical field of battery production, and in particular to a nano silver wire transparent conductive film coating machine. Background Art

[0002] Heterojunction cells are a type of solar cell that consists of p-type semiconductors and n-type semiconductors. Heterojunction cells have the characteristic of converting solar energy into electrical energy, so they are widely used in solar equipment such as solar panels, solar chargers, and solar street lights. In addition, heterojunction cells can also be used in electronic products such as wireless communications, computers, and smartphones.

[0003] Transparent conductive film is an important component of the electrode for preparing heterojunction batteries. The transparent conductive film is mainly composed of a transparent substrate (such as PET, COP, etc.) and a conductive functional material. Conductive functional materials generally include ITO, nanosilver wires, metal grids, carbon nanotubes, graphene, etc. Nanosilver wires have become one of the commonly used conductive functional materials due to their excellent photoelectric properties, low preparation process cost, good compatibility with flexible substrates, excellent mechanical properties and bending properties.

[0004] The silver nanowire transparent conductive film is usually prepared by coating. During the preparation process, the transparent substrate needs to be immersed in the silver nanowire suspension and then dried. In the prior art, the immersed transparent substrate will immediately enter the drying device for drying. Since the transparent substrate is covered with the suspension after being immersed, the suspension will drip onto other equipment outside the coating pool or onto the ground, resulting in waste of the suspension and pollution of the working environment. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a nano silver wire transparent conductive film coating machine, which can avoid the waste of suspension.

[0006] The embodiment of the present invention proposes a nano silver wire transparent conductive film coating machine, comprising: an unwinder, a coating tank, a drying tank, a cooling tank and a winder, wherein the unwinder is suitable for assembling a transparent film coil; the coating tank is suitable for containing a nano silver wire suspension, and a guide roller and an extrusion roller group are connected to the inside of the coating tank, wherein the guide roller is arranged below the liquid surface, and the extrusion roller group is arranged above the liquid surface; a drying roller group is arranged in the drying tank to dry the coated transparent film; the cooling tank has an opening at the top, and a cooling roller group is arranged in the cooling tank to cool the dried transparent film; the winder is connected to a driving device to wind up the prepared nano silver wire transparent conductive film.

[0007] In some embodiments, the squeezing roller group includes three squeezing rollers that are in contact with each other, and the transparent film passes between two adjacent squeezing rollers in sequence.

[0008] In some embodiments, the guide roller is connected to the bottom of the coating tank.

[0009] In some embodiments, a first tension roller is provided between the unwinder and the coating tank, a second tension roller is provided between the coating tank and the drying tank, a third tension roller is provided between the drying tank and the cooling tank, and a fourth tension roller is provided between the cooling tank and the winder.

[0010] In some embodiments, the coating pool is connected to a first lifting device on the side close to the unwinder, the first lifting device is connected to the first tension roller and controls the lifting and lowering of the first tension roller; the coating pool is connected to a second lifting device on the side away from the unwinder, the second lifting device is connected to the second tension roller and controls the lifting and lowering of the second tension roller; the drying pool is connected to a third lifting device on the side close to the cooling pool, the third lifting device is connected to the third tension roller and controls the lifting and lowering of the third tension roller; the cooling pool is connected to a fourth lifting device on the side close to the winder, the fourth lifting device is connected to the fourth tension roller and controls the lifting and lowering of the fourth tension roller.

[0011] In some embodiments, the first lifting device includes two first hydraulic cylinders symmetrically arranged in the horizontal direction, the first hydraulic cylinder includes a first cylinder body and a first cylinder rod, the first cylinder body is fixedly connected to the outside of the coating pool, the first cylinder rod is vertically telescopic, and the upper end of the first cylinder rod is connected to the first tension roller through a first bearing; the second lifting device includes two second hydraulic cylinders symmetrically arranged in the horizontal direction, the second hydraulic cylinder includes a second cylinder body and a second cylinder rod, the second cylinder body is fixedly connected to the outside of the coating pool, the second cylinder rod is vertically telescopic, and the upper end of the second cylinder rod is connected to the second tension roller through a second bearing. Bearing connection; the third lifting device includes two third hydraulic cylinders symmetrically arranged in the horizontal direction, the third hydraulic cylinder includes a third cylinder body and a third cylinder rod, the third cylinder body is fixedly connected to the outside of the drying pool, the third cylinder rod is vertically telescopic, and the upper end of the third cylinder rod is connected to the third tension roller through a third bearing; the fourth lifting device includes two fourth hydraulic cylinders symmetrically arranged in the horizontal direction, the fourth hydraulic cylinder includes a fourth cylinder body and a fourth cylinder rod, the fourth cylinder body is fixedly connected to the outside of the cooling pool, the fourth cylinder rod is vertically telescopic, and the upper end of the fourth cylinder rod is connected to the fourth tension roller through a fourth bearing.

[0012] In some embodiments, the driving device is connected to a controller to control the transmission speed of the transparent film.

[0013] In some embodiments, the drying roller group includes a plurality of drying rollers arranged in a staggered manner in the vertical direction, and the cooling roller group includes a plurality of cooling rollers arranged in a staggered manner in the vertical direction.

[0014] In some embodiments, a plurality of hot air nozzles are arranged in the drying pool, and the hot air nozzles are connected to a hot air device with adjustable temperature.

[0015] In some embodiments, the surface of the squeezing roller is made of rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0017] in:

[0018] Figure 1 Schematic diagram of the structure of a nano silver wire transparent conductive film coating machine in an embodiment of the present invention;

[0019] Reference numerals:

[0020] 1. Unwinder; 2. Transparent film; 3. First tension roller; 4. First lifting device; 5. Coating tank; 6. Guide roller; 7. Squeeze roller group; 8. Second lifting device; 9. Second tension roller; 10. Drying tank; 11. Drying roller; 12. Third tension roller; 13. Third lifting device; 14. Cooling roller; 15. Fourth tension roller; 16. Winder; 17. Fourth lifting device; 18. Cooling tank. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] The following describes a nano silver wire transparent conductive film coating machine according to an embodiment of the present invention with reference to the accompanying drawings.

[0023] like Figure 1 As shown, an embodiment of the present invention proposes a nano silver wire transparent conductive film coating machine, comprising: an unwinder 1, a coating tank 5, a drying tank 10, a cooling tank 18 and a winder 16, the unwinder 1 is suitable for assembling a transparent film coil; the coating tank 5 is suitable for containing a nano silver wire suspension, and the coating tank 5 is internally connected with a guide roller 6 and an extrusion roller group 7, the guide roller 6 is arranged below the liquid surface, and the extrusion roller group 7 is arranged above the liquid surface; the drying tank 10 is provided with a drying roller group to dry the coated transparent film 2; the cooling tank 18 is opened at the top, and the cooling tank 18 is provided with a cooling roller group to cool the dried transparent film 2; the winder 16 is connected to a driving device to wind up the prepared nano silver wire transparent conductive film.

[0024] The embodiment of the present invention arranges a squeezing roller group 7 in the coating pool 5, which can improve the adhesion of the suspension on the transparent film 2 on the one hand, and can squeeze the excess suspension on the transparent film 2 into the coating pool 5 through the squeezing of the squeezing roller group 7 on the other hand, so that it can be reused, thereby preventing the waste of the suspension. At the same time, it also prevents the excess suspension from dripping onto other equipment outside the coating pool 5 or onto the ground, causing pollution to the working environment.

[0025] By arranging the guide roller 6 below the liquid surface, the transparent film 2 is immersed in the suspension to ensure that the transparent film 2 is in full contact with the suspension. By connecting the drive device to the winder 16, a traction force can be provided for the transmission of the transparent film 2. By arranging an opening above the cooling pool 18, ventilation and heat dissipation in the cooling pool 18 are facilitated.

[0026] Furthermore, the driving device is a motor and a reducer.

[0027] Furthermore, a heating device is provided in the drying tank 10, and the temperature of the heating device is adjustable. A cover is provided at the upper end of the drying tank 10 to reduce the temperature loss in the drying tank 10, and an inlet and an outlet of the transparent film 2 are provided on the cover.

[0028] Furthermore, the cooling pool 18 is cooled by natural ventilation, and a fan may also be used to blow natural wind to accelerate cooling.

[0029] In some embodiments, the squeezing roller set 7 includes three squeezing rollers that fit each other, and the transparent film 2 passes through two adjacent squeezing rollers in sequence. Through the two squeezing, the adhesion of the suspension on the transparent film 2 can be further improved, and it is also more conducive to squeezing the excess suspension on the transparent film 2 into the coating pool 5 through the squeezing of the squeezing roller set 7.

[0030] In some embodiments, the guide roller 6 is connected to the bottom of the coating tank 5. The immersion time of the transparent film 2 in the suspension can be prolonged.

[0031] In some embodiments, a first tension roller 3 is provided between the unwinder 1 and the coating tank 5, a second tension roller 9 is provided between the coating tank 5 and the drying tank 10, a third tension roller 12 is provided between the drying tank 10 and the cooling tank 18, and a fourth tension roller 15 is provided between the cooling tank 18 and the winder 16. The tension of the transparent film 2 during the transmission process can be adjusted conveniently.

[0032] In some embodiments, the coating pool 5 is connected to a first lifting device 4 on the side close to the unwinder 1, and the first lifting device 4 is connected to the first tension roller 3 and controls the lifting of the first tension roller 3; the coating pool 5 is connected to a second lifting device 8 on the side away from the unwinder 1, and the second lifting device 8 is connected to the second tension roller 9 and controls the lifting of the second tension roller 9; the drying pool 10 is connected to a third lifting device 13 on the side close to the cooling pool 18, and the third lifting device 13 is connected to the third tension roller 12 and controls the lifting of the third tension roller 12; the cooling pool 18 is connected to a fourth lifting device 17 on the side close to the winder 16, and the fourth lifting device 17 is connected to the fourth tension roller 15 and controls the lifting of the fourth tension roller 15. By connecting the tension roller to the lifting device, the tension of the transparent film 2 can be easily controlled.

[0033] In some embodiments, the first lifting device 4 includes two first hydraulic cylinders symmetrically arranged in the horizontal direction, the first hydraulic cylinder includes a first cylinder body and a first cylinder rod, the first cylinder body is fixedly connected to the outer side of the coating pool 5, the first cylinder rod is vertically telescopic, and the upper end of the first cylinder rod is connected to the first tension roller 3 through a first bearing; the second lifting device 8 includes two second hydraulic cylinders symmetrically arranged in the horizontal direction, the second hydraulic cylinder includes a second cylinder body and a second cylinder rod, the second cylinder body is fixedly connected to the outer side of the coating pool 5, the second cylinder rod is vertically telescopic, and the upper end of the second cylinder rod is connected to the second tension roller 9 through a second bearing. ; The third lifting device 13 includes two third hydraulic cylinders symmetrically arranged in the horizontal direction, the third hydraulic cylinder includes a third cylinder body and a third cylinder rod, the third cylinder body is fixedly connected to the outside of the drying pool 10, the third cylinder rod is vertically telescopic upward, and the upper end of the third cylinder rod is connected to the third tension roller 12 through a third bearing; the fourth lifting device 17 includes two fourth hydraulic cylinders symmetrically arranged in the horizontal direction, the fourth hydraulic cylinder includes a fourth cylinder body and a fourth cylinder rod, the fourth cylinder body is fixedly connected to the outside of the cooling pool 18, the fourth cylinder rod is vertically telescopic upward, and the upper end of the fourth cylinder rod is connected to the fourth tension roller 15 through a fourth bearing.

[0034] Furthermore, the connection relationship between the bearing and the cylinder rod is as follows: the outer ring of the bearing is fixedly connected to the upper end of the cylinder rod, and the inner ring of the bearing is fixedly connected to the tension roller.

[0035] In some embodiments, the driving device is connected to a controller to control the transmission speed of the transparent film 2 .

[0036] In some embodiments, the drying roller 11 group includes a plurality of drying rollers 11 arranged in a staggered manner in the vertical direction, and the cooling roller 14 group includes a plurality of cooling rollers 14 arranged in a staggered manner in the vertical direction.

[0037] By arranging the drying rollers 11 in a staggered arrangement in the vertical direction, the drying efficiency can be improved. By arranging the cooling rollers 14 in a staggered arrangement in the vertical direction, the cooling efficiency can be improved.

[0038] In some embodiments, a plurality of hot air nozzles are arranged in the drying tank 10, and the hot air nozzles are connected to a temperature-adjustable hot air device. By using hot air for drying, the uniformity of drying can be improved.

[0039] In some embodiments, the surface of the squeezing roller is made of rubber material. Since the rubber material has resilience, it can prevent the squeezing roller from damaging the transparent film 2 on the one hand, and on the other hand, it can increase the squeezing force of the roller surface of the squeezing roller, which is more conducive to squeezing out the excess suspension on the transparent film 2.

[0040] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A nano silver wire transparent conductive film coating machine, characterized in that: include: An unwinder, wherein the unwinder is suitable for assembling a transparent film coil; A coating pool, wherein the coating pool is suitable for containing a nano silver wire suspension, wherein a guide roller and an extrusion roller group are connected to the inside of the coating pool, wherein the guide roller is arranged below the liquid surface, and the extrusion roller group is arranged above the liquid surface; A drying tank, wherein a drying roller group is provided in the drying tank to dry the coated transparent film; A cooling pool, the top of which is open, and a cooling roller group is provided in the cooling pool to cool the dried transparent film; A winder is connected to a driving device to wind up the prepared nano silver wire transparent conductive film.

2. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: The squeezing roller group includes three squeezing rollers that are attached to each other, and the transparent film passes through between two adjacent squeezing rollers in sequence.

3. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: The guide roller is connected to the bottom of the coating tank.

4. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: A first tension roller is provided between the unwinder and the coating tank, a second tension roller is provided between the coating tank and the drying tank, a third tension roller is provided between the drying tank and the cooling tank, and a fourth tension roller is provided between the cooling tank and the winder.

5. The nano silver wire transparent conductive film coating machine according to claim 4, characterized in that: The coating tank is connected to a first lifting device at a side close to the unwinder, and the first lifting device is connected to the first tension roller and controls the lifting and lowering of the first tension roller; The coating tank is connected to a second lifting device at a side away from the unwinder, and the second lifting device is connected to the second tension roller and controls the lifting and lowering of the second tension roller; The drying pool is connected to a third lifting device on one side close to the cooling pool, and the third lifting device is connected to the third tension roller and controls the lifting and lowering of the third tension roller; The cooling pool is connected to a fourth lifting device at a side close to the winder, and the fourth lifting device is connected to the fourth tension roller and controls the lifting and lowering of the fourth tension roller.

6. The nano silver wire transparent conductive film coating machine according to claim 5, characterized in that: The first lifting device includes two first hydraulic cylinders symmetrically arranged in the horizontal direction, the first hydraulic cylinder includes a first cylinder body and a first cylinder rod, the first cylinder body is fixedly connected to the outside of the coating pool, the first cylinder rod is vertically extended upward, and the upper end of the first cylinder rod is connected to the first tension roller through a first bearing; The second lifting device includes two second hydraulic cylinders symmetrically arranged in the horizontal direction, the second hydraulic cylinder includes a second cylinder body and a second cylinder rod, the second cylinder body is fixedly connected to the outside of the coating pool, the second cylinder rod is vertically extended upward, and the upper end of the second cylinder rod is connected to the second tension roller through a second bearing; The third lifting device includes two third hydraulic cylinders symmetrically arranged in the horizontal direction, the third hydraulic cylinder includes a third cylinder body and a third cylinder rod, the third cylinder body is fixedly connected to the outside of the drying tank, the third cylinder rod is vertically extended upward, and the upper end of the third cylinder rod is connected to the third tension roller through a third bearing; The fourth lifting device includes two fourth hydraulic cylinders symmetrically arranged in the horizontal direction, the fourth hydraulic cylinder includes a fourth cylinder body and a fourth cylinder rod, the fourth cylinder body is fixedly connected to the outside of the cooling pool, the fourth cylinder rod is vertically extended upward, and the upper end of the fourth cylinder rod is connected to the fourth tension roller through a fourth bearing.

7. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: The driving device is connected to a controller to control the transmission speed of the transparent film.

8. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: The drying roller group includes a plurality of drying rollers arranged in a staggered manner in a vertical direction, and the cooling roller group includes a plurality of cooling rollers arranged in a staggered manner in a vertical direction.

9. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: A plurality of hot air nozzles are arranged in the drying pool, and the hot air nozzles are connected to a hot air device with adjustable temperature.

10. The nano silver wire transparent conductive film coating machine according to claim 1, characterized in that: The surface of the squeezing roller is made of rubber.

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