Apparatus and method for microwave curing of resins in engineere

Details Apparatus and method for microwave curing of resins in engineere Apparatus and method for microwave curing of resins in engineere

1996-11-21

1998-05-26

Leung, Philip H.

Electric heating

Microwave heating

Waveguide applicator

219697, 219701, 219709, 219750, 1562722, 1562737, 1563796, 34264, H05B 668, H05B 678

Patent

active

057569754

ABSTRACT:
An apparatus, system, and method, for using circular mode magnetic microwave energy to heat the interior regions of a work piece of wood fiber and glue. The microwaves are generated and transmitted as rectangular waveguide mode microwave energy, and are converted by mode converter to circular magnetic mode microwave energy. As circular magnetic mode microwave energy, the microwave energy passes through a work piece or billet of material is reflected on the other side, and travels through the billet a second time. Reflected microwave energy from the main reflected wave as well as reflections from other structures, surfaces and layers in the system travel back toward the microwave source. They are sensed, and a computer tuning system causes capacitive probes to generate offsetting microwave reflections, which are opposite in phase and equal in magnitude to the sum of all of the reflected waves. These induced reflections cancel and negate the reflected microwaves, resulting in optimum utilization of microwave energy to heat the wood in the billet.

REFERENCES:
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patent: 4771153 (1988-09-01), Fukushima et al.
patent: 5008506 (1991-04-01), Asmussen et al.
patent: 5166484 (1992-11-01), Young et al.
patent: 5512736 (1996-04-01), Kang et al.
patent: 5552583 (1996-09-01), Berteaud et al.

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