Nozzle cleaning device, doctor blade replacing apparatus and doctor blade replacing method

A nozzle cleaning device, comprising:

• a rail, a support rod, a cleaning platform and a fixing mechanism, one end of the support rod being slidably matched with the rail, the cleaning platform being disposed at the other end of the support rod, the fixing mechanism being disposed at the cleaning platform;
• a doctor blade replacing apparatus for replacing a doctor blade of a nozzle cleaning device, wherein the doctor blade replacing apparatus comprises:
• a first doctor blade box, configured to store a first doctor blade;
• a second doctor blade box, oppositely disposed and spaced with the first doctor blade box, and configured to store a second doctor blade;
• a transferring assembly, comprising a first tray which is disposed between the first doctor blade box and the second doctor blade box and a pushing assembly which is configured to push the first doctor blade in the first doctor blade box to the first tray and push the second doctor blade on the first tray into the second doctor blade box;
• and
• a clamping and conveying mechanism, disposed between the first tray and the nozzle cleaning device, and configured to clamp and convey the first doctor blade and the second doctor blade between the first tray and the nozzle cleaning device;
• wherein the doctor blade replacing apparatus is configured to convey the first doctor blade and the second doctor blade between the first tray and the fixing mechanism by the clamping and conveying mechanism, such that the second doctor blade is capable of being discharged from the fixing mechanism and replaced with the first doctor blade.

A doctor blade replacing method for a nozzle cleaning device, the nozzle cleaning device comprising a rail, a support rod, a cleaning platform and a fixing mechanism, one end of the support rod being slidably matched with the rail, the cleaning platform being disposed at the other end of the support rod, the fixing mechanism being disposed at the cleaning platform, wherein the nozzle cleaning device further comprises:

• a doctor blade replacing apparatus for replacing a doctor blade of a nozzle cleaning device, wherein the doctor blade replacing apparatus comprises:
• a first doctor blade box, configured to store a first doctor blade;
• a second doctor blade box, oppositely disposed and spaced with the first doctor blade box, and configured to store a second doctor blade;
• a transferring assembly, comprising a first tray which is disposed between the first doctor blade box and the second doctor blade box and a pushing assembly which is configured to push the first doctor blade in the first doctor blade box to the first tray and push the second doctor blade on the first tray into the second doctor blade box;
• and
• a clamping and conveying mechanism, disposed between the first tray and the nozzle cleaning device, and configured to clamp and convey the first doctor blade and the second doctor blade between the first tray and the nozzle cleaning device;
• wherein, the doctor blade replacing apparatus is configured to convey the first doctor blade and the second doctor blade between the first tray and the fixing mechanism by the clamping and conveying mechanism, such that the second doctor blade is capable of being discharged from the fixing mechanism and being replaced with the first doctor blade;
• wherein the doctor blade replacing method comprises:
• a doctor blade discharging step, comprising:
• clamping and conveying the second doctor blade of the nozzle cleaning device to the first tray by the clamping and conveying mechanism such that the second doctor blade being discharged from the fixing mechanism;
• and
• a doctor blade replacing step, comprising:
• pushing the second doctor blade on the first tray into the second doctor blade box by the pushing assembly, pushing the first doctor blade in the first doctor blade box to the first tray by the pushing assembly, clamping and conveying the first doctor blade on the first tray to the nozzle cleaning device by the clamping and conveying mechanism such that the first doctor blade being fixed to the fixing mechanism.