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Speed & Accuracy

29 October 2012

In many tabbing and stringing processes the narrow solder-coated copper ribbon used to link the individual cells requires precise flux application to ensure a good connection and prevent discolouration.

Piezoelectric dispensing systems apply flux at high speed with exceptional accuracy – without the mess, waste and safety hazards of flux baths and similar methods.

Nordson EFD’s PICO piezoelectric jet dispensing systems incorporate two piezoelectric actuators composed of stacked ceramic coins that expand and contract in response to changes in voltage supplied from the valve driver. When voltage is applied to the actuators, the rod and sealing ball are raised so the pressurised fluid can flow to the nozzle. When the voltage is changed, the rod and sealing ball descend rapidly to "jet” the fluid out of the nozzle onto the substrate.

The extremely fast action of the piezoelectric actuators makes it possible to dispense fluid continuously at speeds of up to 150 cycles per second.
 
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