APPARATUS AND METHODS FOR DISPENSING SMALL BEADS OF VISCOUS MATERIAL

摘要

Apparatus and methods for dispensing small beads of a viscous, mixed fluid material formed by first and second viscous fluids. The apparatus includes first and second metering rods for moving in a reciprocating manner, such that the first metering rod extends into a first fluid passageway, and the second metering rod extends into a second fluid passageway. A mixing passage communicates with the first and second fluid passageways to receive the first and second viscous fluids from the first and second fluid passageways. A dispensing passageway is in fluid communication with the mixing passage, and dispenses a small bead of viscous, mixed fluid material formed by the mixed first and second viscous fluids. A control retracts the first and second metering rods to prevent drooling of the viscous, mixed fluid material from the dispensing passageway after a dispensing cycle.

主权项

1. Apparatus for dispensing small beads of a viscous, mixed fluid material formed by first and second viscous fluids, the apparatus comprising:
a fluid dispensing body including a first fluid passageway and a second fluid passageway; first and second metering rods, the first metering rod extending into the first fluid passageway, and the second metering rod extending into the second fluid passageway; a mixing passage including a mixer, the mixing passage communicating with the first and second fluid passageways to receive the first and second viscous fluids from the first and second fluid passageways when the first and second metering rods are moved into the first and second fluid passageways; a dispensing passageway in fluid communication with the mixing passage, and configured to dispense a small bead of viscous, mixed fluid material formed by the mixed first and second viscous fluids; and a control operating to retract the first and second metering rods by a distance sufficient to prevent drooling of the viscous, mixed fluid material outward from the dispensing passageway at the end of a dispensing cycle.