The dispensing with the Droplet Tool print head is based on a microvalve that is actuated electromagnetically. Droplet Tool print head is also equipped with heating from RT to +40 °C and an integrated UV/Vis LED module emitting at a wavelength of 365 nm, 405 nm or 450 nm.
The dispensing with the Droplet Tool print head is based on a microvalve that is actuated electromagnetically. When there is no current, the microvalve is closed. The closing spring acts on the mobile anchor with the valve ball. When there is a current feed through the valve coil, the mobile anchor with the valve ball is magnetically pulled by the magnetic field of the stationary anchor. The microvalve opens, and the pressurized fluid can flow. The standard valve type can form droplets ranging in size from 20 nl up to 5 μl and is ideal for contactless dispensing of low-viscosity bioinks, hydrogels, growth factors and cell media.
The print head has a heating function enabling a constant temperature from RT to +40 °C in the syringe barrel (10 cc/ml). Additionally, the valve itself is equipped with a heater enabling heating also from RT to +40 °C. Heating can be used to lower the viscosity of some inks and allow them to be dispensed with the valve. The print head is equipped with an integrated UV/Vis LED module emitting at a wavelength of 365 nm, 405 nm or 450 nm. It allows in situ photocrosslinking of the photosensitive non-viscous bioinks during the deposition process.
