Working principle of cotton T-shirt printer nozzle

by:angelacrox     2021-08-23
Several working principles of T-shirt printer nozzles: The most common piezoelectric material for T-shirt printer nozzles is lead zirconate titanate (PZT) ceramics, and electrical contact equipment is adhered to the material. When high pressure is applied in a specific direction, the piezoelectric material Will be deformed. Subsequently, by applying a lower voltage (usually about 60 to 80V) along or perpendicular to the direction of deformation, the physical size of the ceramic sheet changes. In some driving systems, positive and negative pulses may be applied, and the formation of a single droplet depends on the applied voltage and its limited duration. Otherwise, satellite ink droplets may be formed. The working principle of piezoelectric drop-on-demand inkjet, the piezoelectric crystal in the nozzle of the T-shirt printer expands according to the input electrical signal, squeezes the ink to eject ink droplets from the nozzle, and forms a pattern on the fabric. After the voltage signal disappears, the piezoelectric crystal returns to its original normal size, and the ink chamber is refilled by capillary action. The operating frequency of the piezoelectric nozzle of the T-shirt printer is about 14000 times/s, that is, it can eject 14000 ink droplets per second, and the volume of each ink droplet is about 150 pL.
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