Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1990-09-10
1993-02-09
Hoag, Willard
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
Work is organic material
264109, 264257, B29C 4348, B29C 4356, B29C 4557
Patent
active
051851148
ABSTRACT:
The production of wood material particles into board or panels, such as chipboard, fiberboard, OSB panels, MDF panels and the like, involves coating the particles with a binder free of any hardener. The coated particles are deposited on a support surface in the form of a mat and then are compressed. While the particles are being compressed in a press, an acid or basic hardener in a gaseous phase or in a binary phase with a gaseous carrier agent, is introduced across and into the surface of the mat or directly into the interior mat. The compression of the mat can be performed either in a continuous double band press or a discontinuous single or multi-platen press. In a double band press, two press bands are arranged in opposte relation and the hardener is introduced into the mat in a wedge-shaped inlet zone between the press bands. The hardener flows through openings in the press band onto the surface of the mat. Conduits are located in pressure plates associated with the press and bores extend from the conduits to the pressure plate surfaces in contact with the mat.
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patent: 3051219 (1962-08-01), Kaiser
patent: 3231438 (1966-01-01), Muhm et al.
patent: 3268642 (1966-08-01), Hutter
patent: 3542629 (1970-11-01), Burkner
patent: 3892619 (1975-07-01), Hutz
patent: 4162877 (1979-07-01), Nyberg
patent: 4517147 (1985-05-01), Taylor et al.
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