Droplet jetting applicator and method of manufacturing coated body
A droplet jetting applicator includes a droplet jet head being movably provided, having a nozzle surface provided with multiple nozzles, and being configured to jet a liquid from the multiple nozzles as droplets, a cleaner configured to clean the nozzle surface, an image shooting unit configured to shoot shapes of the droplets jetted from the droplet jet head, and a controller configured to control the droplet jet head, the cleaner, and the image shooting unit and to detect the shapes of the droplets shot by the image shooting unit.
1. A droplet jetting applicator comprising:
a droplet jet head being movably provided and having a nozzle surface provided with a plurality of nozzles, the droplet jet head being configured to jet a liquid as a plurality of droplets respectively from the plurality of nozzles to an object to be coated, each of the droplets on the object having a predetermined shape, the object including a functional region subjected to ejection of the thus formed droplets from the droplet jet head in a predetermined pattern and a check region provided in a region other than the functional region;
a cleaner configured to clean the nozzle surface;
an image shooting unit configured to shoot shapes of the droplets on the object jetted by the droplet jet head; and
a controller configured to control the droplet jet head, the cleaner and the image shooting unit, and to detect the shapes of the droplets on the object shot by the image shooting unit, wherein
the controller is configured to control a preparation process which prepares coating the object and a coating process which is configured to jet the droplets to the functional region, and
the preparation process comprises
jetting the droplets from the nozzles onto the check region while moving the droplet jet head thus forming the droplets on the check region;
causing the droplet jet head to scan the droplets on the check region without jetting additional droplets;
shooting the check region by using the image shooting unit;
detecting shapes of the droplets on the check region shot by the image shooting unit and comparing each of the shapes of the droplets on the check region with the predetermined shape;
cleaning the droplet jet head by use of the cleaner after comparing each of the shapes of the droplets on the check region when the controller judges that a foreign material is deposited on the droplet jet head on the basis of each of the shapes of the droplets on the check region as a result of the comparison; and
replacing the droplet jet head after comparing each of the shapes of the droplets on the check region when the controller judges that the foreign material is deposited on the droplet jet head even after the droplet jet head is cleaned by use of the cleaner, on the basis of each of the shapes of the droplets on the check region as a result of the comparison.