Sublimation inkjet printer-How Does Micro piezoelectric Print Head Work?

Sublimation Inkjet Printer

Working principle of sublimation inkjet printer is setting up four colors (cyan, magenta, yellow and black, or CMYK) solid pigment (called color roll) on a drum, the drum installed tens of thousands of semiconductor heating element.

When raise the temperature of the heating element to a certain extent, it can be solid paint directly into gas (solid not be liquefied become gas process is called sublimation, so the printer is called sublimation printer), then the gas jet to the print media. Each semiconductor heating element can be adjusted to 256 temperatures to adjust the color ratio and intensity to achieve continuous tone true color photo effect.

Micro piezoelectric Technique

The micro-piezoelectric technology divides the control of the ink drop in the inkjet process into three stages: before the inkjet operation, the piezoelectric element firstly contracts slightly under the control of the signal; The element then produces a large extension, pushing the drops out of the nozzle; As soon as the droplet is about to leave the nozzle, the element contracts again, cleanly pulling the ink level from the nozzle. In this way, the surface of the droplet is precisely controlled, and each time the droplet has the perfect shape and the correct direction of flight.

The micro-piezoelectric inkjet system is equipped with a transducer on a nozzle equipped with ink. The transducer is controlled by the printing signal to control the ink injection. 

By using the change of micro-voltage to control the ink jet, not only avoid the shortcomings of hot gas bubble ink jet technology, but also can accurately control the direction and shape of the ink jet. 

The print head of digital sublimation printer uses a piezoelectric crystal at the back of the miniature ink holder. Applying an electric current to the crystal causes it to spring inward. When the current is interrupted, the crystal bounces back to its original position, sending a tiny drop of ink through the nozzle. When the current is restored, the crystal is drawn back and forth, ready to be sprayed with the next drop of ink.