B - Operations – Transporting – 67 – D
Patent
B - Operations, Transporting
67
D
B67D 3/00 (2006.01) B05C 5/02 (2006.01) G01F 13/00 (2006.01) H05K 3/00 (2006.01) H05K 3/22 (2006.01) H05K 3/34 (2006.01)
Patent
CA 2260155
Apparatus and methods for dispensing droplets of liquid or viscous material are disclosed. A valve (32) is opened to dispense a stream of the heated liquid or viscous material through an elongated orifice of a nozzle (40). The stream of material being dispensed from the elongated orifice is broken into droplets by rapidly closing the valve. Furthermore, a method for varying the height of a droplet of liquid or viscous material is disclosed by which two or more droplets combine to form a droplet of a desired height. A method for applying a plurality of droplets of material onto a substrate so that the droplets flow together to form a uniform film of desired thickness and shape is also disclosed. A second embodiment of the invention relates to a dispensing apparatus with a heater assembly (476) removably attached to the dispenser housing.
L'invention concerne un appareil et un procédé destinés à distribuer des gouttelettes d'un matériau liquide ou visqueux. Un soupape (32) est ouverte pour libérer un flux de matériau liquide ou visqueux chauffé à travers un orifice allongé d'une buse (40). Le flux de matériau distribué à partir de l'orifice allongé est fragmenté en gouttelettes par fermeture rapide la soupape. L'invention concerne également un procédé de variation de la hauteur d'une gouttelette d'un matériau liquide ou visqueux, par lequel deux gouttelettes ou plus se combinent pour former une gouttelette qui a la hauteur désirée. L'invention se rapporte en outre à un procédé d'application d'une pluralité de gouttelettes d'un matériau sur un substrat de façon que les gouttelettes coulent ensemble et constituent un film uniforme qui a l'épaisseur et la forme souhaitées. Dans un second mode de réalisation, un appareil de distribution est fourni avec un ensemble (476) de chauffage amovible fixé au logement du distributeur.
Hogan Patrick T.
Saidman Laurence B.
Smith James C.
Corporation Nordson
Macrae & Co.
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