Roll-to-roll dewatering and coating integrated equipment and carbon paper dewatering and coating treatment method

Abstract

The invention provides roll-to-roll dewatering and coating integrated equipment and a carbon paper dewatering and coating treatment method. The apparatus comprises: an unwinding system; the drainage system is arranged on the downstream side of the unwinding system; the coating system is arranged above the drainage system in parallel; the drying system is arranged on the downstream side of the drainage system and the coating system; the winding system is arranged on the downstream side of the drying system. One machine has two purposes, an unwinding system, a drying oven system and a winding system are shared, the equipment cost is effectively reduced, the overall layout of the equipment is more compact, the occupied space of the equipment is greatly reduced, meanwhile, materials do not need to be transferred, dewatering and coating are achieved on the same equipment, the equipment can be operated by only one constructor, labor is saved, and the construction efficiency is improved. The problems that existing reel-to-reel dewatering and coating equipment is split equipment, so that the occupied space is large, materials need to be turned over, and the construction efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon paper hydrophobic coating construction, and in particular to a roll-to-roll hydrophobic coating integrated equipment and a carbon paper hydrophobic coating treatment method. Background Art

[0002] The core component of the fuel cell (PEMFC) is the membrane electrode assembly, which consists of two catalyst layers (CL), two gas diffusion layers (GDL) and a proton exchange membrane (PEM). The gas diffusion layer is a key part of the membrane electrode, which supports the catalyst layer, collects current, conducts gas and discharges the reaction product water. The most ideal material for the commonly used gas diffusion layer (GDL) substrate is carbon paper, which has high conductivity, corrosion resistance and excellent dimensional stability. In order to improve the water management ability of the gas diffusion layer, build efficient gas channels and increase the strength of carbon paper, the carbon paper needs to be hydrophobic before it can be used. The coating process is one of the processes in the preparation of carbon paper for fuel cells. One or more layers of slurry are coated on a carbon paper substrate, and then the coated slurry coating is dried in an oven or cured to form a product with a microporous layer with special functions. This link has very high requirements on the accuracy, reliability and scientific design of the equipment used. The coating process will affect the microstructure of the carbon paper, and then affect the porosity, electrochemical properties, mechanical properties, etc. of the carbon paper. Commonly used coating processes include transfer coating and slot extrusion coating.

[0003] Transfer coating is a method of attaching the slurry to the coating roller, and transferring the slurry to the surface of the carbon paper through a scraper during the rotation of the coating roller. This method has a small coating window and cannot adjust the coating flow rate. It is easy to mix water and impurities during the coating process, resulting in poor coating consistency. Slit extrusion coating is a method of passing a certain flow of slurry from the extrusion head feed port into the internal cavity of the die head and forming a stable pressure. The slurry is finally sprayed out from the die slit outlet and coated on the carbon paper.

[0004] The carbon paper hydrophobic treatment process generally includes: immersing the carbon paper in a hydrophobic solution, absorbing excess hydrophobic solution on the surface of the carbon paper, and sintering the carbon paper in a high-temperature oven.

[0005] At present, the roll-to-roll hydrophobic and coating equipment is a split type of equipment, which is divided into two devices, hydrophobic and coating, for respectively performing hydrophobic and coating of carbon paper. The two devices occupy a large space and require material turnover, resulting in low construction efficiency. Summary of the invention

[0006] In view of this, the present invention proposes a roll-to-roll hydrophobic and coating integrated equipment and a carbon paper hydrophobic coating treatment method, aiming to solve the problem that the existing roll-to-roll hydrophobic and coating equipment is a separate equipment, which occupies a large space, requires material turnover and leads to low construction efficiency.

[0007] On the one hand, the present invention proposes a roll-to-roll hydrophobic and coating integrated equipment, which includes: a reeling system, used for unwinding a roll base film and tearing and rewinding a protective film on the surface of the base film; a hydrophobic system, arranged on the downstream side of the reeling system, used for immersing the roll base film in a hydrophobic treatment to obtain a hydrophobic base film; a coating system, arranged in parallel above the hydrophobic system, used for coating the roll base film with a coating to obtain a coated base film; a drying system, arranged on the downstream side of the hydrophobic system and the coating system, used for drying the hydrophobic base film or the coated base film; a rewinding system, arranged on the downstream side of the drying system, used for covering the hydrophobic base film or the coated base film after the drying treatment with a layer of protective film, and rewinding the hydrophobic base film or the coated base film covered with the protective film.

[0008] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, the drying system includes: a vertical oven, which is arranged vertically, and the hydrophobic base film can pass through the vertical oven in a vertical path to perform vertical drying treatment on the hydrophobic base film; a horizontal oven, which is arranged horizontally on the downstream side of the vertical oven, and the coated base film or the hydrophobic base film after the vertical drying treatment can pass through the horizontal oven in a horizontal path to perform horizontal drying treatment on the hydrophobic base film; a high-temperature oven, which is arranged on the downstream side of the horizontal oven, and is used to perform sintering treatment on the hydrophobic base film or the coated base film after the horizontal drying treatment; a cooling oven, which is arranged on the downstream side of the high-temperature oven, and is used to gradually cool down the hydrophobic base film or the coated base film after the sintering treatment to prevent the external environment from affecting the effective area of ​​the oven.

[0009] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, a hydrophobic guide wheel and a coating guide wheel are provided in the vertical oven above the oven body of the vertical oven, the hydrophobic guide wheel is used to guide the hydrophobic base film after the vertical drying treatment so that it extends toward the outlet of the vertical oven, and the coating guide wheel is used to support and guide the coated base film output by the coating system so that it extends toward the outlet of the vertical oven.

[0010] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, the winding system includes: a plurality of winding rollers for guiding and supporting the hydrophobic base film or the coating base film; a winding floating roller mechanism, one of the winding rollers serving as a winding tension roller, on which a tension detection mechanism is provided, the winding floating roller mechanism is connected to the tension detection mechanism, and the winding floating roller mechanism is also connected to the winding tension roller, for adjusting the winding tension roller based on the tension of the base film detected by the tension detection mechanism. Position adjustment to adjust the tension of the base film; a winding correction mechanism, arranged between the two winding rollers, for correcting the hydrophobic base film or coated base film supported on the winding roller; a rolling mechanism, arranged between the two winding rollers, for rolling the hydrophobic base film or coated base film after drying; a winding mechanism, arranged on the downstream side of the winding roller, for winding the hydrophobic base film or coated base film; a coating mechanism, for covering the base film with a layer of protective film before the winding mechanism winds up the base film.

[0011] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, the rolling mechanism includes: a rolling driving roller; a pressing driven roller, which is arranged on one side of the rolling driving roller in a position-adjustable manner, and is used to adjust the pressure control applied to the hydrophobic base film or the coating base film between the rolling driving roller and the pressing driven roller to control the thickness of the hydrophobic base film or the coating base film.

[0012] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, a liquid-piercing roller system is also provided between the hydrophobic system and the drying system, for removing excess hydrophobic liquid on the hydrophobic base film.

[0013] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, the liquid-absorbing roller system includes: a liquid-absorbing driving roller; a liquid-absorbing driven roller, which is arranged on one side of the liquid-absorbing driving roller in a position-adjustable manner, and is used to adjust the distance between the liquid-absorbing driving roller and the liquid-absorbing driven roller and the pressure on the hydrophobic base film, so as to cooperate with the liquid-absorbing driving roller to remove excess hydrophobic liquid on the hydrophobic base film by extrusion; two roller scrapers, which are respectively arranged on the peripheries of the liquid-absorbing driving roller and the liquid-absorbing driven roller, and are used to scrape off impurities on the liquid-absorbing driving roller and the liquid-absorbing driven roller.

[0014] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, an insertable vibrating rod is provided in the hydrophobic tank of the hydrophobic system for dispersing the hydrophobic liquid; a circulation tank is also provided in the hydrophobic tank of the hydrophobic system for circulating the hydrophobic liquid in the hydrophobic tank.

[0015] Furthermore, in the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, the unwinding system includes: an unwinding mechanism for unwinding the roll base film; a film tearing mechanism for tearing and rewinding the protective film on the surface of the roll base film; a plurality of unwinding rollers for guiding and supporting the roll base film; an unwinding tension roller, which is arranged between the rollers, for guiding and supporting the roll base film and detecting the tension of the roll base film; an unwinding floating roller mechanism, which is connected to the unwinding tension roller and to the downstream winding roller, and is used to adjust the position of the downstream roller based on the tension of the roll base film detected by the tension roller, so as to adjust the tension of the roll base film.

[0016] On the other hand, the present invention also proposes a carbon paper hydrophobic coating treatment method, which adopts the above-mentioned roll-to-roll hydrophobic and coating integrated equipment, including the following steps: placing the roll base film on the unwinding system, and winding the roll base film onto the hydrophobic system, the drying system and the winding system in turn, controlling the unwinding system, the hydrophobic system, the drying system and the winding system to operate, so as to unwind, hydrophobicize, dry and wind up the roll base film in turn, thereby completing the hydrophobic treatment of the roll base film; or placing the roll base film on the unwinding system, and winding the roll base film onto the coating system, the drying system and the winding system in turn, controlling the unwinding system, the coating system, the drying system and the winding system to operate, so as to unwind, coat, dry and wind up the roll base film in turn, thereby completing the coating treatment of the roll base film. The roll-to-roll hydrophobic and coating integrated equipment and carbon paper hydrophobic coating treatment method provided by the present invention combine the roll-to-roll hydrophobic and coating equipment into one, and can realize the switching of hydrophobic and coating, that is, when hydrophobic is required, the hydrophobic belt is threaded and the control program is switched to hydrophobic so as to perform hydrophobic treatment, and when coating is required, the coating belt is threaded and the program is switched to coating so as to perform coating treatment, realizing the purpose of one machine for dual purposes, sharing the unwinding, oven and winding system, effectively reducing the equipment cost, and the overall layout of the equipment is also more compact, greatly reducing the floor space of the equipment, and at the same time, the material does not need to be transported, and the hydrophobic and coating are realized in the same equipment, and only one construction worker is needed to operate the equipment, saving labor, and solving the problem that the existing roll-to-roll hydrophobic and coating equipment is split equipment, resulting in a large floor space, requiring materials to be turned over, and resulting in low construction efficiency. Among them, the coil base film can be carbon paper or other materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic structural diagram of a roll-to-roll hydrophobic and coating integrated device provided in an embodiment of the present invention; Figure 2 A schematic structural diagram of a roll-to-roll hydrophobic and coating integrated device for performing hydrophobic treatment provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a roll-to-roll hydrophobic and coating integrated device for coating processing provided in an embodiment of the present invention; Figure 4 for Figure 2 A partial enlarged view of the middle A; Figure 5 for Figure 2 A partial enlarged view of point B in the middle; Figure 6 for Figure 2 A partial enlarged view of point C in the middle; Figure 7 for Figure 2 A partial enlarged view of point D in the middle; Figure 8 A schematic structural diagram of a rolling mechanism provided by an embodiment of the present invention; Fig. 9 A schematic structural diagram of a liquid-binding roller system provided in an embodiment of the present invention; Fig.10 A structural schematic diagram of a carbon paper hydrophobic coating treatment method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] Device Example: See also Figures 1 to 9 , which shows the preferred structure of the roll-to-roll hydrophobic and coating integrated equipment provided by the embodiment of the present invention. As shown in the figure, the roll-to-roll hydrophobic and coating integrated equipment includes: an unwinding system 1, a hydrophobic system 2, a coating system 3, a drying system 4 and a winding system 5; wherein, The unwinding system 1 is used for unwinding the roll base film 6 and tearing and rewinding the protective film on the surface of the base film; the hydrophobic system 2 is arranged on the downstream side of the unwinding system 1 (such as Figure 1The right side shown in the figure) is used to perform a hydrophobic treatment on the roll base film 6 to obtain a hydrophobic base film; the coating system 3 is arranged in parallel above the hydrophobic system 2 (relative to the Figure 1 The drying system 4 is arranged at the downstream side of the hydrophobic system 2 and the coating system 3 (such as Figure 1 The right side shown in the figure) is used to dry the hydrophobic base film or the coated base film; the winding system 5 is arranged on the downstream side of the drying system 4 (such as Figure 1 The right side of the figure is used to cover a protective film on the hydrophobic base film or the coated base film after deviation correction and tension control, and to roll up the hydrophobic base film or the coated base film covered with the protective film.

[0020] Specifically, from the upstream side to the downstream side, that is, from left to right, the unwinding system 1, the water-draining system 2, the drying system 4 and the winding system 5 are arranged in sequence, and the water-draining system 2 and the coating system 3 are arranged vertically and side by side between the unwinding system 1 and the drying system 4, and the water-draining system 2 is placed at the bottom, with the left end placed below the coating system 3 and the right end placed below the drying system 4. Figure 2 As shown, when hydrophobicity is required, hydrophobic tape threading is performed, that is, the roll base film is placed on the unwinding system 1, and the roll base film is wound on the hydrophobic system 2, the drying system 4 and the winding system 5 in sequence. The unwinding system 1, the hydrophobic system 2, the drying system 4 and the winding system 5 can be controlled by switching the control program to operate, so as to unwind, hydrophobicize, dry and wind the roll base film in sequence, thereby completing the hydrophobic treatment of the roll base film; as shown Figure 3 As shown, when coating is required, the coating and belting are performed, that is, the roll base film is placed on the unwinding system 1, and the roll base film is wound onto the coating system 3, the drying system 4 and the winding system 5 in sequence. The unwinding system 1, the coating system 3, the drying system 4 and the winding system 5 can be controlled by switching the control program to operate, so as to unwind, coat, dry and rewind the roll base film in sequence, and then complete the coating process of the roll base film, so as to achieve the purpose of one machine for two purposes, share the unwinding, oven and winding system, effectively reduce the equipment cost, and make the overall layout of the equipment more compact, greatly reducing the space occupied by the equipment. At the same time, the material does not need to be transported, and the hydrophobic and coating are realized in the same equipment. Moreover, only one construction worker is required to operate the equipment, saving labor, and solving the problem that the existing roll-to-roll hydrophobic and coating equipment is a split equipment, which occupies a large space, requires material turnover and leads to low construction efficiency. Among them, the roll base film can be carbon paper or other materials.

[0021] Continue to see Figure 2 and Figure 5A liquid-pumping roller system 7 is also provided between the hydrophobic system 2 and the drying system 4 to remove excess hydrophobic liquid on the hydrophobic base film. Specifically, the liquid-pumping roller system 7 is used for metering and squeezing liquid after the carbon paper is impregnated, and ensures the stability of the hydrophobic liquid loading by removing excess hydrophobic liquid.

[0022] Continue to see Figure 4 The unwinding system 1 includes: an unwinding mechanism 11, a film tearing mechanism 12, a plurality of unwinding rollers 13, a tension detection mechanism (not shown in the figure), and an unwinding floating roller mechanism 14; wherein the unwinding mechanism 11 is used for unwinding the base film of the roll; the film tearing mechanism 12 is used for tearing and rewinding the protective film on the surface of the base film of the roll; a plurality of unwinding rollers 13 are used for guiding and supporting the base film of the roll; one of the unwinding rollers 13 serves as an unwinding tension roller 1301, and a tension detection mechanism is provided on the unwinding tension roller 1301 for detecting the tension of the base film of the roll; the unwinding floating roller mechanism 14 is connected to the tension detection mechanism, and the unwinding floating roller mechanism 14 is connected to the unwinding tension roller 1301 for adjusting the position of the unwinding tension roller 1301 based on the tension of the base film of the roll detected by the tension detection mechanism, so as to adjust the tension of the base film of the roll.

[0023] Specifically, at least two unwinding rollers 13 are sequentially provided on the downstream side of the unwinding mechanism 11. In this embodiment, six are used as an example for explanation. Of course, other numbers are also possible and are not limited in this embodiment. In this embodiment, four unwinding rollers 13 are centrally arranged on the right side of the unwinding mechanism 11, and the other two unwinding rollers 13 are arranged at the hydrophobic system 2 and the coating system 3, which can further guide the subsequent direction of the roll base film so that the roll base film output by the unwinding system 1 can be output to the hydrophobic system 2 or the coating system 3. The film tearing mechanism 12 is arranged on the upper right side of the unwinding mechanism 11, and can tear off and rewind the protective film on the surface of the roll base film after the unwinding mechanism 11 is unwound, that is, tear off the protective film on the surface of the roll base film and rewind the protective film. In this embodiment, an unwinding correction mechanism 15 can also be provided between the two unwinding rollers 13, which is used to detect and correct the position of the roll base film. The downstream side of the unwinding correction mechanism 15 (such as Figure 4 The right side of the unwinding system 1 is also provided with a tape splicing platform 16 for splicing the roll base film after the roll is changed. A static electricity removal mechanism 17 can be provided between the two unwinding rollers 13, especially on the downstream side of the unwinding tension roller 1301, for removing static electricity from the surface of the substrate, i.e., the roll base film. In other words, the unwinding system 1 is controlled in a floating roller mode, which can better ensure the stability of tension when the equipment is started or stopped, thereby preventing the carbon paper from breaking due to uneven tension.

[0024] Continue to see Figure 5The hydrophobic system 2 can be used for the impregnation and hydrophobic treatment of carbon paper. The hydrophobic system 2 is provided with a hydrophobic tank 21 for carrying the hydrophobic liquid. In this embodiment, an inserted vibrating rod 22 is provided in the hydrophobic tank 21 for dispersing the hydrophobic liquid, so as to make the suspended liquid flow through ultrasonic vibration, avoid the precipitation of substances in the hydrophobic liquid, and make the hydrophobic liquid evenly dispersed, thereby making the hydrophobic liquid on the carbon paper more uniform. Furthermore, the hydrophobic system 2 is also provided with a circulation tank, i.e., a circulation pump (not shown in the figure), which is arranged outside the hydrophobic tank 21 and connected to the hydrophobic tank 21 through a pipeline, and is used to circulate the hydrophobic liquid in the hydrophobic tank 21 to further prevent the precipitation of the hydrophobic liquid.

[0025] Continue to see Figure 2 , Figure 3 and Figure 6 The drying system 4 includes: a vertical oven 41, a horizontal oven 42, a high temperature oven 43 and a cooling oven 44; wherein the vertical oven 41 is arranged vertically, and the hydrophobic base film can pass through the vertical oven 41 in a vertical path to vertically dry the hydrophobic base film; the vertical section oven is a suspension oven to pre-dry the carbon paper, thereby avoiding the situation that the hydrophobic liquid appears light on the top and heavy on the bottom when the carbon paper runs horizontally; the horizontal oven 42 is arranged horizontally on the downstream side of the vertical oven 41 (such as Figure 6 As shown in the right side, the coated base film or the hydrophobic base film after vertical drying can pass through the horizontal oven 42 in a horizontal path to perform horizontal drying on the hydrophobic base film; the high temperature oven 43 is arranged on the downstream side of the horizontal oven 43 (as shown in the right side). Figure 2 The cooling oven 44 is arranged on the downstream side of the high temperature oven 43 (as shown in the right side), which is used to sinter the hydrophobic base film or the coated base film after the horizontal drying process; Figure 2 The right side shown in the figure) is used to gradually cool down the hydrophobic base film or coated base film after sintering to prevent the external environment from affecting the effective area of ​​the oven.

[0026] Specifically, the vertical oven 41 is arranged vertically, and the hydrophobic base film can pass through the vertical oven 41 in a vertical path to perform vertical drying treatment on the hydrophobic base film, that is, to perform carbon paper hydrophobic post-drying. The vertical oven 41 prevents the liquid inside the base paper from being light on the top and heavy on the bottom, thereby ensuring the uniformity of both sides. The horizontal oven 42 is arranged horizontally on the downstream side of the vertical oven 41 (such as Figure 6 The coated base film or the hydrophobic base film after vertical drying can pass through the horizontal oven 42 in a horizontal path to perform horizontal drying on the hydrophobic base film and dry the carbon paper after hydrophobization or coating. The high temperature oven 43 is arranged on the downstream side of the horizontal oven 42 (as shown in FIG. Figure 3The cooling oven 44 is arranged on the downstream side of the high temperature oven 43 (as shown in the right side), and is used for sintering the hydrophobic base film or the coated base film after the horizontal drying process, especially the high temperature sintering of the carbon paper after the hydrophobic or coated. Figure 3 As shown on the right side), it is used to gradually cool down the hydrophobic base film or coated base film after sintering, that is, as a transition oven for the oven temperature of the hydrophobic or coated carbon paper to prevent the external environment from affecting the effective area of ​​the oven.

[0027] Continue to see Figure 6 In the vertical oven 41, a hydrophobic guide wheel 412 and a coating guide wheel 413 are provided above the oven body 411 of the vertical oven 41. The hydrophobic guide wheel 412 is used to guide the hydrophobic base film after the vertical drying treatment so that it extends toward the outlet of the vertical oven. The coating guide wheel 413 is used to support and guide the coating base film output by the coating system 3 so that it extends toward the outlet of the vertical oven 41.

[0028] Specifically, three guide wheels are provided above the oven body 411 in the vertical oven 41, and the three guide wheels are arranged in a triangle. The three guide wheels are respectively a hydrophobic guide wheel 412, a coating guide wheel 413 and a supporting guide wheel 414. The hydrophobic guide wheel 412 and the coating guide wheel 413 are arranged up and down, and can be arranged obliquely; the supporting guide wheel 414 can be arranged horizontally flush with the hydrophobic guide wheel 412, and the coating base film output by the coating system 3 can be supported and guided by the hydrophobic guide wheel 412 and the supporting guide wheel 414, so that it is horizontally transported downstream to be transported into the horizontal oven 42, and the hydrophobic base film output by the vertical oven 41 is supported and guided by the coating guide wheel 413 and the supporting guide wheel 414, so that it is horizontally transported downstream to be transported into the horizontal oven 42.

[0029] Continue to see Figure 7The winding system 5 includes: a plurality of winding rollers 51, a winding floating roller mechanism 52, a winding correction mechanism 53, a rolling mechanism 54, a winding mechanism 55 and a coating mechanism 56; wherein, the plurality of winding rollers 51 are used to guide and support the hydrophobic base film or the coated base film; one of the winding rollers 52 is used as a winding tension roller, on which a tension detection mechanism (not shown in the figure) is provided, and the winding floating roller mechanism 53 is connected to the tension detection mechanism, and the winding floating roller mechanism 53 is also connected to the winding tension roller, for detecting the tension of the base film based on the tension detection mechanism. , adjust the position of the winding tension roller to adjust the tension of the base film; the winding correction mechanism 53 is arranged between the two winding rollers 51, and is used to correct the hydrophobic base film or the coated base film supported on the winding roller 51; the rolling mechanism 54 is arranged between the two winding rollers 51, and is used to roll the hydrophobic base film or the coated base film after the drying treatment; the winding mechanism 55 is arranged on the downstream side of the winding roller 51, and is used to wind up the hydrophobic base film or the coated base film; the coating mechanism 56 is used to cover a layer of protective film on the base film before the winding mechanism 55 winds up the base film.

[0030] Specifically, there may be seven winding rollers 51, which guide and support the hydrophobic base film or the coated base film, so that the hydrophobic base film or the coated base film passes through the winding correction mechanism 53, the winding floating roller mechanism 52, the rolling mechanism 54, the winding mechanism 55, etc. in sequence, and the hydrophobic base film or the coated base film can be corrected, tension controlled, rolled and wound in sequence. The winding floating roller mechanism 52 can balance the speed of the front and rear sections, ensure the tension stability, and prevent the carbon paper from breaking due to uneven tension. In other words, the winding system 5 is controlled by the floating roller mode, and when the equipment is started or stopped, the tension stability can be better guaranteed, thereby preventing the carbon paper from breaking due to uneven tension.

[0031] Continue to see Figure 8 The rolling mechanism 54 includes: a rolling driving roller 541 and a pressing driven roller 542; wherein the pressing driven roller 542 is arranged on one side of the rolling driving roller 541 in a position-adjustable manner, and is used to adjust the pressure control of the hydrophobic base film or the coating base film between the rolling driving roller 541 and the pressing driven roller 542 to control the thickness of the hydrophobic base film or the coating base film.

[0032] Specifically, the rolling drive roller 541 can be used as a driving roller, and can drive the hydrophobic base film or coated base film sandwiched between the two to be transmitted. The laminating driven roller 542 is arranged on one side of the rolling drive roller 541 in a position-adjustable manner, and the pressure control of the hydrophobic base film or coated base film between the rolling drive roller 541 and the laminating driven roller 542 can be adjusted to control the thickness of the hydrophobic base film or coated base film. In this embodiment, there can be two laminating driven rollers 542, that is, a steel roller + two steel rollers are clamped to perform secondary rolling on the microporous layer, and a set of steel rod clamping installation positions can be reserved separately, wherein one set of laminating driven rollers 542 is driven by an electric cylinder to control the spacing, and one set of laminating driven rollers 542 is driven by a pneumatic cylinder to control the pressure.

[0033] Continue to see Fig. 9 The liquid-absorbing roller system 7 includes: a liquid-absorbing driving roller 71, a liquid-absorbing driven roller 72 and two roller scrapers 73; wherein, the liquid-absorbing driven roller 72 is arranged on one side of the liquid-absorbing driving roller 71 in a position-adjustable manner, for adjusting the distance between the liquid-absorbing driving roller 71 and the liquid-absorbing driven roller 72 and the pressure on the hydrophobic base film, so as to cooperate with the liquid-absorbing driving roller 71 to remove excess hydrophobic liquid on the hydrophobic base film by squeezing; the two roller scrapers 73 are respectively arranged on the peripheries of the liquid-absorbing driving roller 71 and the liquid-absorbing driven roller 72, for scraping off impurities on the liquid-absorbing driving roller 71 and the liquid-absorbing driven roller 72.

[0034] Specifically, the liquid-piercing driving roller 71 can be used as a driving roller, which can drive the hydrophobic base film sandwiched between the two for transmission. The liquid-piercing driven roller 72 is arranged on one side of the liquid-piercing driving roller 71 in a position-adjustable manner, and the spacing between the liquid-piercing driving roller 71 and the liquid-piercing driven roller 72 or the pressure on the hydrophobic base film can be adjusted to remove excess hydrophobic liquid on the hydrophobic base film by squeezing, control the pressure and thus control the degree of squeezing. The cylinder can be equipped with a precision electrical proportional valve to ensure uniform pressure and stable hydrophobic liquid load. The liquid-piercing driving roller 71 and the liquid-piercing driven roller 72 can be equipped with a roller scraper 73, which is used to scrape impurities on the liquid-piercing driving roller 71 and the liquid-piercing driven roller 72 to prevent contamination of the carbon paper.

[0035] The hydrophobic treatment process of the equipment: First, the carbon paper is manually Figure 2The belt is threaded in the threading guidance method shown in the figure; heating is started, and the vertical oven 41, the horizontal oven 42, the high-temperature oven 43 and the cooling oven 44 are heated to the set temperature value; the hydrophobic liquid is added into the hydrophobic tank 21, and the circulation tank is started to filter and circulate the hydrophobic liquid; and the status of each station of the equipment is inspected to see if it is normal, and after confirming the equipment parameters in the operation interface, the equipment is started; the carbon paper is unwound through the unwinding mechanism 11, and enters the hydrophobic system 2 for hydrophobing after tension control and deviation correction, and passes through the liquid-binding roller assembly 7 for liquid-binding treatment; then enters the vertical oven 41 and the horizontal oven 42 for drying, and then enters the high-temperature oven 43 for sintering; after exiting the cooling oven 44, the carbon paper enters the rolling mechanism 54 and the winding mechanism 55 of the winding system 5 after deviation correction and tension control by the winding floating roller mechanism 52 and the winding deviation correction mechanism 53; finally, it is wound and unloaded manually.

[0036] The hydrophobic treatment process of the equipment: First, the carbon paper is manually Figure 3 Thread the tape in the manner shown in the threading guide; heat and start, heat the vertical oven 41, the horizontal oven 42, the high-temperature oven 43 and the cooling oven 44 to the set temperature value; inject the slurry into the storage tank of the slurry conveying system, start the feed pump, and convey the slurry to the die head cavity of the coating system 3 through the pipeline; inspect whether the status of each station of the equipment is normal, and start the equipment after confirming the equipment parameters in the operation interface; the carbon paper is unwound through the unwinding mechanism 11, and enters the coating system 3 to complete the coating after tension control and correction; then enters the horizontal oven 42 for drying, and then enters the high-temperature oven 43 for sintering; exits the cooling oven 44, and enters the winding system 5 after correction and tension control; finally, a layer of protective film is compounded and rolled up; and the roll is unloaded manually.

[0037] In summary, the roll-to-roll hydrophobic and coating integrated equipment provided in this embodiment combines the roll-to-roll hydrophobic and coating equipment into one, and can realize the switching between hydrophobic and coating. That is, when hydrophobic is required, the hydrophobic belt is threaded and the control program is switched to hydrophobic to perform hydrophobic treatment; when coating is required, the coating belt is threaded and the program is switched to coating to perform coating treatment, thereby realizing the dual purpose of one machine, sharing the unwinding, oven and winding systems, effectively reducing the equipment cost, and the overall layout of the equipment is more compact, greatly reducing the space occupied by the equipment. At the same time, there is no need to transport materials, and hydrophobic and coating can be achieved on the same equipment. Moreover, only one construction worker is needed to operate the equipment, saving labor and solving the problems that the existing roll-to-roll hydrophobic and coating equipment is a split equipment, which occupies a large space, requires material turnover and leads to low construction efficiency.

[0038] Method Example: See also Fig.10, which is a flowchart of a carbon paper hydrophobic coating treatment method provided by an embodiment of the present invention. As shown in the figure, the carbon paper hydrophobic coating treatment method adopts the above roll-to-roll hydrophobic and coating integrated equipment, including the following steps: Step S1, placing the roll base film on the unwinding system, and winding the roll base film onto the hydrophobic system, drying system and winding system in sequence, controlling the unwinding system, hydrophobic system, drying system and winding system to operate, so as to unwind, hydrophobize, dry and wind the roll base film in sequence, thereby completing the hydrophobic treatment of the roll base film.

[0039] Specifically, the carbon paper is manually Figure 2 The belt is threaded in the threading guidance method shown in the figure; heating is started, and the vertical oven 41, the horizontal oven 42, the high-temperature oven 43 and the cooling oven 44 are heated to the set temperature value; the hydrophobic liquid is added into the hydrophobic tank 21, and the circulation tank is started to filter and circulate the hydrophobic liquid; and the status of each station of the equipment is inspected to see if it is normal, and after confirming the equipment parameters in the operation interface, the equipment is started; the carbon paper is unwound through the unwinding mechanism 11, and enters the hydrophobic system 2 for hydrophobing after tension control and deviation correction, and passes through the liquid-binding roller assembly 7 for liquid-binding treatment; then enters the vertical oven 41 and the horizontal oven 42 for drying, and then enters the high-temperature oven 43 for sintering; after exiting the cooling oven 44, the carbon paper enters the rolling mechanism 54 and the winding mechanism 55 of the winding system 5 after deviation correction and tension control by the winding floating roller mechanism 52 and the winding deviation correction mechanism 53; finally, it is wound and unloaded manually.

[0040] Step S2, placing the roll base film on the unwinding system, and winding the roll base film onto the coating system, drying system and winding system in sequence, controlling the unwinding system, coating system, drying system and winding system to operate, so as to unwind, coat, dry and wind the roll base film in sequence, thereby completing the coating process of the roll base film.

[0041] Specifically, first, the carbon paper is manually Figure 3 Thread the tape in the manner shown in the threading guide; heat and start, heat the vertical oven 41, the horizontal oven 42, the high-temperature oven 43 and the cooling oven 44 to the set temperature value; inject the slurry into the storage tank of the slurry conveying system, start the feed pump, and convey the slurry to the die head cavity of the coating system 3 through the pipeline; inspect whether the status of each station of the equipment is normal, and start the equipment after confirming the equipment parameters in the operation interface; the carbon paper is unwound through the unwinding mechanism 11, and enters the coating system 3 to complete the coating after tension control and correction; then enters the horizontal oven 42 for drying, and then enters the high-temperature oven 43 for sintering; exits the cooling oven 44, and enters the winding system 5 after correction and tension control; finally, a layer of protective film is compounded and rolled up; and the roll is unloaded manually.

[0042] In this embodiment, step S1 and step S2 can be performed in one of the steps, for example, the hydrophobic or coating treatment of carbon paper can be performed by the above equipment, or by other equipment. There is no limitation on it in this embodiment, and of course the two steps can also be performed sequentially.

[0043] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0044] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A roll-to-roll hydrophobic and coating integrated equipment, characterized in that: include: Unwinding system, used for unwinding the roll base film and tearing and winding the protective film on the surface of the base film; A hydrophobic system, arranged at the downstream side of the unwinding system, for performing an immersion hydrophobic treatment on the roll base film to obtain a hydrophobic base film; A coating system is arranged in parallel above the hydrophobic system and is used to coat the coating on the coiled base film to obtain a coated base film; A drying system, disposed at the downstream side of the hydrophobic system and the coating system, for drying the hydrophobic base film or the coating base film; The winding system is arranged at the downstream side of the drying system, and is used to cover a layer of protective film on the hydrophobic base film or the coated base film after the drying process, and to wind up the hydrophobic base film or the coated base film covered with the protective film.

2. The roll-to-roll hydrophobic and coating integrated equipment according to claim 1, characterized in that: The drying system comprises: A vertical oven is arranged vertically, and the hydrophobic base film can pass through the vertical oven in a vertical path to perform a vertical drying process on the hydrophobic base film; A horizontal oven is horizontally arranged at the downstream side of the vertical oven, and the coated base film or the hydrophobic base film after vertical drying can pass through the horizontal oven in a horizontal path to perform a horizontal drying treatment on the hydrophobic base film; A high temperature oven, arranged at the downstream side of the horizontal oven, for sintering the hydrophobic base film or the coating base film after the horizontal drying process; The cooling oven is arranged at the downstream side of the high temperature oven and is used for cooling the hydrophobic base film or the coating base film after the sintering treatment.

3. The roll-to-roll hydrophobic and coating integrated equipment according to claim 2, characterized in that: A hydrophobic guide wheel and a coating guide wheel are provided above the oven body of the vertical oven. The hydrophobic guide wheel is used to guide the hydrophobic base film after vertical drying treatment so that it extends toward the outlet of the vertical oven, and the coating guide wheel is used to support and guide the coated base film output by the coating system so that it extends toward the outlet of the vertical oven.

4. The roll-to-roll hydrophobic and coating integrated equipment according to any one of claims 1 to 3, characterized in that: The winding system comprises: A plurality of winding rollers for guiding and supporting the hydrophobic base film or the coating base film; A winding floating roller mechanism, wherein one of the winding rollers is used as a winding tension roller, on which a tension detection mechanism is provided, the winding floating roller mechanism is connected to the tension detection mechanism, and the winding floating roller mechanism is also connected to the winding tension roller, and is used to adjust the position of the winding tension roller based on the tension of the base film detected by the tension detection mechanism, so as to adjust the tension of the base film; A winding correction mechanism, disposed between the two winding rollers, for correcting the hydrophobic base film or the coating base film supported on the winding rollers; A rolling mechanism, disposed between the two winding rollers, for rolling the hydrophobic base film or the coated base film after drying; A winding mechanism, disposed on the downstream side of the winding roller, for winding the hydrophobic base film or the coating base film; The laminating mechanism is used to cover a layer of protective film on the base film before the base film is rolled up by the rolling mechanism.

5. The roll-to-roll hydrophobic and coating integrated equipment according to claim 4, characterized in that: The rolling mechanism comprises: Roller drive roller; A lamination driven roller is arranged on one side of the rolling drive roller in a position-adjustable manner, and is used to adjust the pressure control applied to the hydrophobic base film or the coated base film between the rolling drive roller and the lamination driven roller to control the thickness of the hydrophobic base film or the coated base film.

6. The roll-to-roll hydrophobic and coating integrated equipment according to any one of claims 1 to 3, characterized in that: A liquid-piercing roller system is also provided between the hydrophobic system and the drying system to remove excess hydrophobic liquid on the hydrophobic base film.

7. The roll-to-roll hydrophobic and coating integrated equipment according to claim 6, characterized in that: The liquid-binding roller system comprises: Liquid-piercing driving roller; a liquid-inserting driven roller, which is arranged on one side of the liquid-inserting driving roller in a position-adjustable manner, and is used to adjust the distance between the liquid-inserting driving roller and the liquid-inserting driven roller and the pressure on the hydrophobic base film, so as to cooperate with the liquid-inserting driving roller to remove excess hydrophobic liquid on the hydrophobic base film by squeezing; Two roller scrapers are respectively arranged on the outer peripheries of the liquid piercing driving roller and the liquid piercing driven roller, and are used for scraping off impurities on the liquid piercing driving roller and the liquid piercing driven roller.

8. The roll-to-roll hydrophobic and coating integrated equipment according to any one of claims 1 to 3, characterized in that: The hydrophobic system has a hydrophobic tank provided with an inserted vibrating rod for dispersing the hydrophobic liquid; A circulation tank is also provided in the drain tank of the drain system for circulating the drain liquid in the drain tank.

9. The roll-to-roll hydrophobic and coating integrated equipment according to any one of claims 1 to 3, characterized in that: The unwinding system comprises: An unwinding mechanism, used for unwinding the roll base film; The film-tearing mechanism is used for tearing and rewinding the protective film on the surface of the roll base film; A plurality of unwinding rollers, used for guiding and supporting the roll base film; An unwinding tension roller, disposed between the passing rollers, for guiding and supporting the roll base film and detecting the tension of the roll base film; The unwinding floating roller mechanism is connected to the unwinding tension roller and to the downstream winding roller, and is used to adjust the position of the downstream roller based on the tension of the roll base film detected by the tension roller to adjust the tension of the roll base film.

10. A method for treating carbon paper with hydrophobic coating, characterized in that: The roll-to-roll hydrophobic and coating integrated equipment according to any one of claims 1 to 9 comprises the following steps: The roll base film is placed on the unwinding system, and the roll base film is sequentially wound onto the hydrophobic system, the drying system, and the winding system, and the unwinding system, the hydrophobic system, the drying system, and the winding system are controlled to operate, so as to sequentially unwind, hydrophobize, dry, and wind the roll base film, thereby completing the hydrophobic treatment of the roll base film; The roll base film is placed on the unwinding system, and is wound onto the coating system, drying system and winding system in sequence. The unwinding system, coating system, drying system and winding system are controlled to operate so as to unwind, coat, dry and wind the roll base film in sequence, thereby completing the coating process of the roll base film.

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