LIQUID MATERIAL DISCHARGE APPARATUS AND METHOD

摘要

A liquid material discharge apparatus and a method which can easily adjust a movement speed of a plunger. An Example of liquid material discharge apparatus includes a liquid chamber (50) which communicates with a discharging port (11) and to which a liquid material is supplied; a plunger whose rear end portion has a piston (33) and whose front end portion moves forward and rearward inside the liquid chamber (50); an elastic body (47) which applies a biasing force to the plunger; and a pressurizing chamber (49) in which the piston (33) is arranged and to which compressed gas is supplied. The liquid material is discharged through the discharging port (11) by the plunger to move forward fast, the elastic body (47) biases the plunger in a rearward movement direction, and the compressed gas applies a driving force to the piston (33) to cause the plunger to move forward.

主权项

1. A liquid material discharging apparatus comprising:
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 plunger; and a pressurizing chamber in which the piston is arranged and to which compressed gas is supplied, wherein the liquid material is discharged through the discharging port by causing the plunger to move forward, wherein the elastic body biases the piston of the plunger in a rearward movement direction, wherein the compressed gas supplied to the pressurizing chamber applies a driving force to the piston to cause the plunger to move forward, and the air pressure of the pressurizing chamber can be adjusted, and wherein a lateral surface of the plunger does not contact the side wall of the liquid chamber when the plunger is advanced.