Patent ID: 12191505

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The following is further an illustration of the present invention in connection with specific embodiments below, but does not limit the present invention in any way.

Embodiment 1

A roll-to-roll continuous coater for CCM preparation is internally provided with a PLC system and a plurality of driving roller assemblies1running through the roll-to-roll coater. Each set of the driving roller assembly1is composed of a tensioning wheel1-1and a floating wheel1-2. The roll-to-roll continuous coater further includes a coating area located at the transfer beginning end in a transfer direction of the driving roller assembly. The coating area includes an unwinding roller6for mounting the proton exchange membrane coiled material. The coiled material is tensioned and installed on the driving roller assembly after it is placed on the unwinding roller6to form a transfer from beginning to end in the roll-to-roll coater. In addition, the roll-to-roll continuous coater includes an oven9located at the rear station of the coating area in the transfer direction. The coiled material connection mechanism of the present invention is disposed between the unwinding roll6and the entrance of the oven9.

As shown inFIGS.1and4, the coiled material connection mechanism includes an upper rack2relatively close to the unwinding roller6and a lower rack3relatively close to a set of driving roller assembly1. The bottom of the upper rack2is provided with a vacuum suction plate I2-3for leveling and suctioning a proton exchange membrane, and the top of the lower rack3is provided with a vacuum suction plate II3-1for leveling and suctioning of the proton exchange membrane.

The vacuum suction plate I2-3and the vacuum suction plate II3-1are metal plates with a plurality of suction holes, and each of the metal plates is connected to a fan through a gas pipe. The fan operates to vacuum the interior of metal plate to achieve vacuum suction. The shape and size of the vacuum suction plate I2-3and the vacuum suction plate II3-1are the same.

As shown inFIGS.2and4, the upper rack2is also internally provided with a driving device in signal-connected to a PLC system circuit and controlling a displacement of the vacuum suction plate I2-3to attach to the vacuum suction plate II3-1. The driving device includes an X/Y axis driving sliding table and a Z axis driving sliding table, which are installed with a driving motor, that is, the driving sliding tables are electrically driven by driving motors to realize linear sliding of the vacuum suction plate I2-3in X, Y and Z directions.

As shown inFIG.1, the lower rack3is a fixed mechanism that cannot displace, and is disposed diagonally below a set of driving roller assembly1. As shown inFIGS.1,3and4, a solid glue spraying device3-3in signal-connected to the PLC system circuit is disposed on the lower rack3. The solid glue spraying device3-3includes a nozzle3-3-5for spraying a solid glue, a driving motor I3-3-1and a driving screw I3-3-2for controlling the nozzle3-3-5to slide in a straight line along a width direction of the vacuum suction plate II3-1, and a driving motor II3-3-3, a transmission gearbox3-3-6and a driving screw II3-3-4controlling the nozzle3-3-5to slide in a straight line along a height direction of the vacuum suction plate.

In the roll-to-roll continuous coater, as shown inFIG.1, the upper rack2is located away from the driving roller assembly1, and the lower rack3is disposed diagonally below the driving roller assembly1. Both racks avoid contact with the proton exchange membrane in a tensioned state. Before the connection mechanism operates, all the mechanisms on the upper rack2and the lower rack3are in a power-off state.

In the embodiment, as shown inFIGS.1and4, an optical fiber sensor I2-4in signal-connected to the PLC system circuit is disposed in the vacuum suction plate I2-3and an optical fiber sensor II3-2in signal-connected to the PLC system circuit is disposed in the vacuum suction plate II3-1. The optical fiber sensor II3-2is disposed at the center of the vacuum suction plate II3-1, and the optical fiber sensor I2-4is located on the side, close to the driving roller assembly1, of the optical fiber sensor II3-2when the vacuum suction plate I2-3is displaced, under the action of the driving device, to be right above the vacuum suction plate II3-1. At this time, the distance between the optical fiber sensor II2-4and the optical fiber sensor II3-2is 2 mm, as shown inFIG.5. At the same time, the nozzle3-3-5of the solid glue spraying device3-3is located between the optical fiber sensor I2-4and the optical fiber sensor II3-2, facilitating the spraying of the nozzle3-3-5at a determined position. That is, if both the vacuum suction plate I2-3and the vacuum suction plate II3-1are suctioned with proton exchange membrane at this time, there is a 2 mm superimposed region between the two proton exchange membranes, i.e. the connection head. The nozzle3-3-5between the optical fiber sensor I2-4and the optical fiber sensor II3-2sprays solid glue to the superimposed region of the proton exchange membrane on the vacuum suction plate II3-1under the action of the solid glue spraying device3-3, so that the two proton exchange membranes are adhesive connected.

As shown inFIG.1, in order to ensure that the above vacuum suction plate I2-3is accurately displaced to right above the vacuum suction plate II3-1under the action of the driving device, the coiled material connection mechanism further includes two travel switches5disposed above the lower rack3and used for respectively contacting with two adjacent side walls of the vacuum suction plate I2-3. The travel switches5are also in signal-connected to the PLC system circuit, that is, a signal is triggered by means of the contact between the vacuum suction plate I2-3and the two travel switches5, and the displacement motion of the driving device is stopped after the PLC system receives the signal from the travel switch5, at this time, the vacuum suction plate I2-3is located right above the vacuum adsorption plate II3-1.

In the embodiment, as shown inFIG.1, a tension detection device, in signal-connected to the PLC system circuit and acting on the proton exchange membrane4, is disposed between the lower rack3and the driving roller assembly1. The tension detection device4includes a rotating wheel4-1acting a pressure on the proton exchange membrane. One end, away from the proton exchange membrane, of the rotating wheel4-1is fixedly connected to a pressure spring4-2. One end, away from the rotating wheel4-1, of the pressure spring4-2is provided with a pressure sensor4-3in signal-connected to the PLC system circuit.

A connection method using the above connection mechanism uses the following steps:S1. During the normal coating operation of the roll-to-roll continuous coater, the upper rack2and the lower rack3located between the oven9and the unwinding roll6are in a power-off state, the vacuum suction plate I2-3is located away from the driving roller assembly1, the vacuum suction plate II3-1is located diagonally below the driving roller assembly1and is not in contact with the proton exchange membrane in a tensioned state. When a coiled material of the coated proton exchange membrane7on the unwinding roller6is used up, the tail of the coiled material is separated from the unwinding roller6, and the tension of a section of the proton exchange membrane between the unwinding roller6and the driving roller assembly1adjacent to the unwinding roller6disappears, so that the section thereof naturally hangs, and part of which is covered on the surface of the vacuum suction plate II3-1. Meanwhile, the rotating wheel4-1acting on the coated proton exchange membrane7transmits the changed tension to the pressure sensor4-3, and the pressure sensor4-3sends a signal to the PLC system.S2. After receiving the signal from the pressure sensor4-3, the PLC system controls mechanisms on the upper rack2and the lower rack3to be power-on. At this time, since the coated proton exchange membrane7naturally hangs on the surface of the vacuum suction plate II3-1and covers the optical fiber sensor II3-2, so that a signal from the optical fiber sensor II3-2is displayed on the display screen of the PLC system. Meanwhile, since the vacuum suction plate I2-3is still located away from the driving roller assembly1and no proton exchange membrane contacts it, the optical fiber sensor I2-4is in a no signal state.S3. The PLC system controls the driving roller assembly1to continue operating to slowly transfer the remaining coated proton exchange membrane7to the driving roller assembly1at a transfer speed of 1 m/s. When the tail of the coated coating exchange membrane is transferred to the vacuum suction plate II3-1, the proton exchange membrane is separated from the optical fiber sensor II3-2during the continuous transfer process, and the PLC system controls the driving roller assembly1to stop rotating once the signal from the optical fiber sensor II3-2disappears in the display screen of the PLC system, so that the tensioning roller and the floating roller tensions the coated proton exchange membrane7. At this time, the tail of the coated proton exchange membrane7is located at a side, close to the driving roller assembly1, of the optical fiber sensor II3-2.S4. The PLC system controls the vacuum suction plate II3-2for vacuum suction of the coated proton exchange membrane, at this time, the coated proton exchange membrane can be smoothly suctioned on the surface of vacuum suction plate II3-1through manual operation.S5. A new coiled material8is placed onto the unwinding roller6, and the starting end of the new coiled material8is manually pulled to the vacuum suction plate2-3. In order to ensure the flatness of the new coiled material on the vacuum suction plate I2-3, the vacuum suction plate I2-3can be controlled to move to a position parallel to the unwinding roller6through the driving device in advance. The new coiled material8is manually pulled until the PLC system displays a signal received from the optical fiber sensor I2-4, at this time, the new coiled material8covers the optical fiber sensor I2-4on the vacuum suction plate I2-3.S6. The PLC system controls the vacuum suction plate I2-3for vacuum suction of the new coiled material8, realizing the positioning of the new coiled material8on the vacuum suction plate I2-3.S7. the PLC system controls the unwinding roller6to rotate to slowly wind the new coiled material8at a transfer speed of 0.5 m/s until the signal from the optical fiber sensor I2-4on the display screen of the PLC system disappears, that is, the PLC system controls the unwinding roller6to stop rotating when the optical fiber sensor I2-4is exposed outside again.S8. The PLC system controls the nozzle3-3-5in the solid glue spraying device3-3to spray a layer of high-temperature resistant glue onto the coated proton exchange membrane on the vacuum suction plate II3-1with a thickness of 30 μm and a width of 2 mm.S9. the driving device controls the vacuum suction plate I2-3to horizontally move in X direction and Y direction towards the vacuum suction plate II3-1until the PLC system receives signals from the two travel switches5, at this time, the vacuum suction plate I2-3is located right above the vacuum suction plate II3-1, and there is a 2 mm superimposed region between the new coiled material8suctioned by the vacuum suction plate I2-3and the coated proton exchange membrane on the vacuum suction plate II3-1, and the superimposed region has been sprayed with solid glue in step S8.S10. The PLC system controls the driving device to lower the vacuum suction plate I2-3, so that the new coiled material8is attached to the coated proton exchange membrane7, forming a coiled body with a connection head. After completion of the connection, both the vacuum suction plate I2-3and the vacuum suction plate II3-1stop the suction effect on the proton exchange membrane, and the vacuum suction plate I2-3moves to the original position away from the driving roller assembly1.S11. The PLC system controls the driving roller assembly1to drive the coiled material body with a connection head to be gradually tensioned and transferred to the oven9of a temperature of 60° C. for drying for 8 s, so as to ensure the rapid curing of the solid glue, so that the coated proton exchange membrane7and the new coiled material8are tightly adhesive connected at the superimposed region, and then the connected proton exchange membrane are reversely transferred to the coating area to coat the coiled material body from the starting end.

For those skilled in the art, without departing from the scope of the technical solution of the present invention, many possible changes and modifications can be made to the technical solution of the present invention by using the technical contents disclosed above, or modified into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall still belong to the protection scope of the technical solution of the present invention.