B - Operations – Transporting – 27 – N
Patent
B - Operations, Transporting
27
N
B27N 3/18 (2006.01) B27N 3/24 (2006.01)
Patent
CA 2162752
The invention provides a process and apparatus for the continuous production of wood boards, but primarily for the production of chip and fibreboard, in which a mat of material- to-be-pressed, compounded with binders, is formed from an initial mixture of chips and/or fibres at a dispersal station on a continuously moving dispersal belt, and this mat of material-to-be-pressed after precompression and preheating between the dispersal station and the main pressing area, is brought into final form and hardened with application of pressure and heat in the main pressing area. The invention consists in that moisture in the mat of material-to-be-pressed at the entry into the main pressing area is lower than the moisture in the initial mixture during the dispersal of the mat of material-to-be-pressed, a portion of the moisture passed to the mat of material-to-be-pressed during dispersal having been withdrawn from the mat by preheating by means of hot air. The equipment is designed as a preforming press with a preheating and moisture conditioning device, which is enclosed by a continuously operating upper and lower steam- permeable wire mesh belt, preferably a woven belt, and forms a closed system, comprising several processing segments, consisting of a precompression press, a hot air heating and drying device, and, if required, a steam sprinkler for the pressing surfaces of the mat of material.
Kirby Eades Gale Baker
Maschinenfabrik J. Dieffenbacher Gmbh & Co.
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