Liquid material discharge apparatus and method

A liquid material discharge method of using a liquid material discharging apparatus that includes a liquid chamber which communicates with a discharging port and to which a liquid material is supplied, the liquid chamber having a side wall;

• a discharging path having the discharging port;
• a plunger whose rear portion has a piston and whose front portion moves forward and rearward inside the liquid chamber, the front portion being thinner than the liquid chamber such that the front portion does not contact the side wall of the liquid chamber;
• an elastic body which applies a biasing force to the piston of the plunger;
• and a pressurizing chamber in which the piston is arranged and to which compressed gas is supplied, the method comprising:
• a filling process of causing the plunger to move in a rearward movement direction by ejecting the compressed gas inside the pressurizing chamber;
• and
• a discharging process of causing the plunger to move forward at a desired speed by supplying the compressed gas which is adjusted to have a desired pressure to the pressurizing chamber,
• wherein in the discharging process, a lateral surface of the plunger does not contact the side wall of the liquid chamber when the plunger is advanced.