In-line microwave heating of adhesives

Details In-line microwave heating of adhesives In-line microwave heating of adhesives

1998-06-12

1999-09-07

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624417, 1562733, 1562757, 1563809, 156578, 264474, 26421124, 219693, 219750, B32B 3100, B29C 4702

Patent

active

059481943

ABSTRACT:
A method of dispensing the material that is heated by microwave energy immediately before the material is dispensed. The method comprises a series of steps including conveying the material through a pressurized passage through a dispensing tube that has radial boundaries transparent to microwave energy. The dispensing tube is located within a microwave resonant chamber. The microwave energy is channeled from a microwave generating source along a waveguide to the microwave resonant chamber. Material within the passage is heated by the microwave energy and produces a TM.sub.020 heating profile with negligible heating at the radial boundaries of the dispensing tube. The material is dispensed onto a component along a path. The dispensing step requires a measure of time to define a dispensing cycle. The output of the microwave generating source is varied. The amount of microwave heating that occurs within the material is dependent upon the output of the microwave generating source. Material dispensed at a first point along the bond path is heated to a first temperature. Material dispensed at a second point along the bond path is heated to a second temperature.

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patent: 5719380 (1998-02-01), Coopes et al.

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