Device for dispensing fixed-amount of adhesive

Abstract

Abstract PURPOSE:To stabilize a dispensed amount at each operation by a method wherein a spiral rod having a through hole in an axial direction is installed inside a needle to be freely turned and to be movable in the axial direction and an excess part of a dispensed adhesive is recovered by turning the rod. CONSTITUTION:A syringe 4 and a needle 2 at its tip part are raised collectively by an elevator device; a rotary shaft 9 and a spiral rod 7 are raised collectively by the elevator device. If the needle 2 and the spiral rod 7 are lowered by a length acute angleA in this state, an opening end B of the needle 2 closely adheres to the surface of a substrate 1; if an air pressure is impressed to the inside of the syringe 4 from a dispenser, an adhesive 3 inside the syringe 4 fills a blocked space 20 through a through hole 14. A height of the space 20 at this stage is higher by alpha than a target height h. Accordingly, because an excess adhesive is dispensed, the spiral rod 7 is lowered further by alpha and the height of the space 20 is set to the target height h. During this process, the spiral rod 7 is turned and an excess part 3' of the adhesive 3 is recovered.

Inventors

• 👤 Hidekazu Tamura
• 👤 Joshi Narui

Bibliographic Details