B - Operations – Transporting – 27 – D
Patent
B - Operations, Transporting
27
D
B27D 1/04 (2006.01) B27D 3/04 (2006.01) B32B 21/14 (2006.01)
Patent
CA 2279810
The invention provides a process and a facility for the manufacture of timber-derived product board, wherein prior to a pressing step, the board is preheated by means of high-frequency (HF) or microwave energy (MW) and, after being transferred to a press, is pressed and cured by applying pressure and heat. Preheating to ~ 85°C in the core of the material to be pressed is carried out after or during precompressing by means of traveling-wave microwave energy and its reflexion in a reciprocal action between transmitted and reflected energy in the centre of the material to be pressed, whereby the focus of the radiant energy is in the middle cross section and whereby the preheated material to be pressed enters the pressing area of the press with a moisture content that is 15% to 30% less than the conventional moisture content.
Kirby Eades Gale Baker
Maschinenfabrik J. Dieffenbacher Gmbh & Co.
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