Liquid droplet discharging device having advanced position specifying mechanism

摘要

The liquid material discharge device and method discharges a liquid droplet even under a condition where discharge of a small amount of liquid material is required. The apparatus has a liquid chamber having the discharge opening through which the liquid material is discharged, an extrusion member having a plunger and a contact portion, the plunger being thinner than the liquid chamber not to contact a side wall of the liquid chamber and having a forward end portion which advances and retracts within the liquid chamber, and a collision member disposed adjacent to the extrusion member on the side opposite to the plunger and having a piston and a collision portion facing the contact portion. The collision portion collides against the contact portion such that the extrusion member is advanced at a high speed to discharge the liquid material.

主权项

1. A liquid droplet discharging device comprising:
a liquid chamber having a discharge opening through which a liquid material is discharged; an extrusion member including a plunger, the plunger being thinner than the liquid chamber so as not to contact a side wall of the liquid chamber and having a forward end portion which is advanced and retracted within the liquid chamber; a contact portion provided on the extrusion member; a driver for advancing and retracting the extrusion member; and a main body on which the extrusion member is disposed, and a stopper facing the contact portion, wherein a foremost advanced position of the extrusion member is set at a position where the forward end portion of the plunger does not contact with an inner wall of the liquid chamber, the foremost advanced position of the extrusion member is determined by a contact between the contact portion and the stopper, and the forward end portion of the plunger can be always held in non-contact with the inner wall of the liquid chamber while the extrusion member is advanced to discharge the liquid material.