| 摘要 |
Method and apparatus for shaping, preferably bending, hardened flat wood fibre boards comprising cellulose fibers, lignin and hardening oil, by moistening, heating, bending and subsequent cooling. The boards (1) are fed continuously into a moistening apparatus in which, during their advance, the boards are moistened by a chemical solution applied to the upper and/or lower faces of the boards over the zones which are to be bent, subsequent to which the boards are heated by high-frequency energy at preferably 27 MHz to about 40-160 DEG C simultaneously as they are bent or moulded to a desired predetermined shape in which shape the boards are maintained during cooling. An apparatus for bending the boards (1) includes at least one conveyor (2) for continuous advance of the boards to be bent, said conveyor (2) including, in the advancing direction of the boards, a moistening apparatus (3) for supplying a predetermined quantity of moisture to the upper and lower faces of the boards, a heating and shaping apparatus (4) comprising two forming surfaces (8) serving as electrodes and between which the boards can be advanced during simultaneous heating and shaping, and a cooling apparatus (5) in which the boards are fixed as to their shape during cooling. |
