Plastic article or earthenware shaping or treating: apparatus – Press forming means – press reshaping means – or vulcanizing... – Cooperating endless belts
Patent
1989-02-06
1990-01-23
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Press forming means, press reshaping means, or vulcanizing...
Cooperating endless belts
100151, 156555, 1565835, 425406, B29C 4348
Patent
active
048955086
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 beng 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 opposed 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.
REFERENCES:
patent: 4044087 (1977-08-01), Robitschek et al.
patent: 4485733 (1984-12-01), Held
patent: 4589948 (1986-05-01), Held
patent: 4605467 (1986-08-01), Bottger
Heitbrink Timothy W.
Woo Jay H.
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