| 摘要 |
An apparatus for the production of single-ply or multiply boards comprises a collecting belt (15) for receiving a fleece (20), a precompression stage (17) for compressing a fleece (20), a compression unit (19) having conveyors (31, 33, 35, 37) each comprising two opposite roller groups comprising two or more rollers for longitudinal or longitudinal/thickness compression of the fleece, a multi-ply unit (21) for forming layers of different densities and a curing oven (25) for fixing the compressed fleece. Compaction is preferably effected by longitudinal compression, and preferably there is no further thickness compression after the compression unit (19). The boards made on the apparatus can be pleated but generally have a substantially random fibre orientation, the fibres being arranged in a corrugated pattern, and good mechanical properties such as high tread, compressive, piercing and tensile strength for comparatively low density. |
