CPC B05C 11/1018 (2013.01) [B05C 1/02 (2013.01)] | 9 Claims |
1. A coating apparatus, comprising: a coating module, the coating module comprising a coating roller and a coating die, wherein the coating roller is configured to drive, when rotating, a substrate to move toward the coating die, and the coating die is configured to apply a coating onto the substrate; an error acquisition module having a predetermined distance to the coating roller, configured to acquire a circular run-out error of rotation of the coating roller and transmit the circular run-out error to a linkage module; and
the linkage module, configured to adjust position of the coating die in real time according to the circular run-out error transmitted to the linkage module, so as to keep a distance between the coating roller and the coating die unchanged;
wherein the linkage module comprises:
an error compensation module, configured to push, according to the circular run-out error, a displacement transfer module to produce displacement; and
the displacement transfer module, fixedly connected to the coating die, wherein displacement of the displacement transfer module pushes the coating die to move so as to adjust the position of the coating die;
wherein the error compensation module comprises:
a signal converter, configured to convert the circular run-out error into a voltage signal and transmit the voltage signal to a piezoelectric ceramic; and
the piezoelectric ceramic, deforming when receiving the voltage signal and configured to push the displacement transfer module to produce displacement;
wherein the displacement transfer module comprises:
an elastic member fastened to the piezoelectric ceramic, wherein deformation of the piezoelectric ceramic pushes the elastic member to deform; and
a sliding module in contact with the elastic member, wherein deformation of the elastic member pushes the sliding module to have displacement;
wherein the sliding module is fastened to the coating die and configured to push the coating die to move when the sliding module is having displacement.
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