Patent ID: 8439227

Claim:
A viscous liquid material discharging method comprising the steps of: preparing an apparatus comprising a screw having a helical blade which is axially provided with a helical pitch over a surface of a rod-like member, a rotation driver for rotating the screw, a main body having a screw insertion bore in which the screw is inserted, a liquid material supply port formed in a lateral side of the screw insertion bore, a liquid material supply flow passage communicating with the liquid material supply port, a sealing member which is disposed in the screw insertion bore and through which the screw penetrates, and a nozzle mounted to the main body and communicating with the screw insertion bore; forming a liquid-arresting space above the liquid material supply port in the screw insertion bore, the liquid-arresting space having a diameter increasing portion of a conical shape positioned in a state that its lower end is positioned higher than the liquid material supply port and its upper end is adjacent to the sealing member; and supplying the liquid material to the screw insertion bore while keeping the liquid material from contacting the sealing member, and rotating the screw in a forward direction to discharge the liquid material from the nozzle.