Viscous material dispensing machine having programmed positioning

摘要: A machine for dispensing a viscous material in predetermined pattern onto surface. nozzle the form of chemical tip (hollow needle) is positioned three spatial coordinates by servomechanisms controlled pre-programmed digital process controller. The controller also controls emission through according to deposition. apparatus includes vacuum/pressure pumping degassing holding tank and subsequently pressurizing it delivery nozzle. poppet type valve actuating solenoid deterine flow an output chamber communication with diaphragm spring arrangement provide draw-back action when closed prevent dripping from