The clogging of the nozzle holes is one of the common failures and damages of ceramic inkjet printing machines. The prerequisite to ensure the stability of the ink jetted by the nozzle hole is that the viscosity of the ink must be constant. At present, due to the different types of solvents used in inks of different brands, the specific gravity of the solvent and the solute of the ceramic ink is quite different, which is easy to precipitate and cause the nozzle to be blocked.
For this reason, people in the industry suggest that before selecting inks on the machine, technicians of automatic printing machines should carefully perform related tests in the ink supply system, such as the pipes, filters, ink supply pumps and other components that are in contact with the ink. The compatibility test ensures that the components used will not be "dissolved" by the ink or shorten their life. At the same time, different models and brands of nozzles have different adaptability to indicators such as ink viscosity, so you should test them before use and communicate with ink suppliers and equipment manufacturers.
Normally, nozzle clogging is mainly divided into nozzle internal clogging and external clogging. In general, the internal clogging of the nozzle is caused by two reasons: ink path pollution and ink precipitation. Incomplete cleaning of newly installed parts can easily cause ink path contamination. At the same time, a suitable filter should be selected for the machine, otherwise, too thick will easily cause the nozzle to block, and too detailed will cause the filter itself to block. As for the ink sedimentation factor, it is closely related to the suspension of the ink and the ink supply system of the machine itself.
Generally it is caused by the machine itself or external pollution. The external pollution sources of the oval printing machine are dust from the workshop, mud dust and water vapor brought in by the bricks. The pollution caused by the machine itself prevents the ink dots ejected from the nozzles from sticking to the brick surface, floats up, and then falls on the nozzles, accumulating more and more over time. Regarding how to slow down the phenomenon of nozzle blockage, before the bricks enter the inkjet machine room, the bricks can be "cleaned" to reduce the mud and dust pollution brought by the bricks. "The usual practice is to lower the temperature to below 40°C, and basically no water vapor comes out, install multiple blowers to blow off the flash, glaze powder, dust, etc. of the body, so as to reduce the pollution brought into the inkjet room by the workshop. ."
