Method and apparatus for high-speed drying and consolidating of

Details Method and apparatus for high-speed drying and consolidating of Method and apparatus for high-speed drying and consolidating of

1995-09-15

1997-06-24

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to heat the...

Electrical heating

264316, 264324, 264449, 264479, 264489, 264491, 4251744, 4251748R, 4251748E, 425383, B29C 3512, B29C 6700

Patent

active

056414498

ABSTRACT:
Methods and apparatus for rapidly drying and compacting wet fiber mats are disclosed. Rapid drying is produced by heating the wet fiber mats with a combination of radiowave energy and conductive heating. As the fiber mats are heated, three-dimensional compacting forces are applied by pressing the fiber mats between a flat surface press and a porous support on which is mounted a resilient mold insert. At high radio frequencies in the microwave range, power is transmitted from a multimode cavity through the porous support and resilient mold insert to the fiber mat. At low radio frequencies, differential radio-frequency voltages are applied directly to metal press plates which contain and compact the fiber mat. Methods and apparatus can be adapted to conveyorized or multi-opening press operations. Objects suitable for use with the invention are most commonly characterized by having a flat face surface on one side and webs or other features which may extend normal or generally normal to the flat surface.

REFERENCES:
patent: 4111744 (1978-09-01), Reiniger
patent: 4702870 (1987-10-01), Setterholm et al.

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