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US 5,288,526 AGranted
Ventilated curing oven and preheat flash zone system for curing coatings on circuit boards
AssigneeNordson Corporation
InventorsPatrick T. Hogan, Richard G. Christyson
Life of this patent
Estimating the term…
Abstract
Apparatus and process for curing conformal coatings on circuit boards being conveyed through a curing chamber within a UV oven. Warm air, exhausted from a lamp housing containing UV lamps for curing the coatings, is directed into a flash zone chamber through which the coated circuit boards are conveyed prior to entering the UV oven for flashing volatile constituents from the coatings and raising the temperature of the circuit boards.
Claims21
A system for curing coatings on substrates, comprising:
- a UV oven having a curing chamber for curing the coatings of said substrates conveyed therethrough;
- a UV lamp housing within said UV oven containing a source of UV light, said lamp housing including an opening for directing UV light into said curing chamber to cure the coatings of said substrates conveyed through said curing chamber;
- blower means for blowing air into said lamp housing whereby a first portion of said air flows across said source of UV light and exhausts as hot air into said curing chamber and a second portion of said air for cooling said lamp housing exhausts as warm air into a flash zone chamber means located upstream from said UV oven for flashing off volatile constituents from said coatings on said substrates and raising the temperature of said substrates conveyed through said flash zone chamber means.
A process of curing conformal coatings on circuit boards being conveyed through a UV oven, comprising the steps of:
- conveying said circuit boards through a curing chamber within said UV oven;
- directing UV light from a lamp housing containing UV lamps onto said coatings of said circuit boards for curing said coatings;
- blowing air into said lamp housing;
- and
- directing exhausted from said lamp housing into a flash zone chamber through which said coated circuit boards are conveyed prior to entering said UV oven for flashing volatile constituents from said coatings and raising the temperature of said circuit boards.
2 more elements
Dependencies are inferred from the claim text.