Method in the production of compression moulded objects

Claim 1

IN THE MANUFACTURE OF COMPRESSED CELLULOSIC PARTICLE BOARD CONSISTING OF NON-DEFIBRATED WOOD CHIPS HAVING A MOISTURE CONTENT OF FROM 3 TO 15%, SAID CHIPS HAVING DIFFERENT MOISTURE SWELLING CHARACTERISTICS ALONG THE DIRECTION OF THE CELLULOSIC FIBERS THAN TRANSVERSE THERETO; SAID WOOD CHIPS IN THE DRY STATE BEING SURFACE TREATED WITH A WATER RESISTANT THERMOSETTING SYNTHETIC RESIN BINDER SELECTED FROM THE CLASS CONSISTING OF PHENOL FORMALDEHYDE RESIN, UREAFORMALDEHYDE RESIN, AND MELAMINE FORMALDEHYDE RESIN AND THEREAFTER FORMED AS A SHEET BY MOLDING UNDER HEAT AND PRESSURE; THAT IMPROVEMENT FOR STABILIZING THE THICKNESS DIMENSION OF THE MOLDED PARTICLE BOARD AFTER MOLDING AND PRIOR TO STORING AND USING CONSISTING OF UNIFORMLY IMPREGNATING THE MOLDED PARTICLE BOARD WITH MOISTURE FOR A PERIOD OF TIME OF AT LEAT SEVERAL HOURS UNTIL AN AMOUNT OF WATER OF AT LEAST ABOUT 20 UP TO 100% BY WEIGHT OF SAID BOARD IS PICKED UP BY SAID BOARD TO THEREBY SWELL THE THICKNESS FROM ABOUT 7% TO ABOUT 30%, THEN DRYING THE MOISTURE TREATED BOARD UNTIL THE MOISTURE CONTENT IS REDUCED BELOW 20% AND DOWN TO 6% BY WEIGHT OF SAID DRY SHEET AND TRIMMING THE DRIED SHEET TO REDUCE THE THICKNESS TO THE PRE-DETERMINED VALUE WHEREBY A DIMENSIONALLY STABILIZED BOARD IS PRODUCED.