| 摘要 |
PURPOSE: To continuously produce a corrugated inorg. fiberboard having flexibility, capable of being applied to a curved surface in a close contact state, reduced in wt., enhanced in compression strength and ply separation strength, made constant in the height of corrugations and the interval between corrugations and improved so as to have the same heat insulating capacity as a heat insulating panel. CONSTITUTION: An inorg. fiber web 4 obtained by orienting and laminating inorg. fibers having a resin bonded thereto in a laminar state is folded zigzag by a corrugating machine 6 consisting of a pair of folding operation members to orient inorg. fibers in a vertical direction and this folded web is molded under heating and pressure to produce a corrugated inorg. fiberboard. The inorg. fiber web 4 corrugated by the corrugating machine 6 is supplied to a heating and molding furnace 8 and pressed by lower and upper perforated belt conveyors 7, 9 so as to have desired corrugation height. By adjusting the speed ratio of the upper and lower perforated belt conveyors 9, 7, the inorg. fiber web 4 is folded so as to provide inclination. |
