Patent ID: 6203738
Filing Date: 2001-03-20
Classification: B27N,B29K

Abstract:
In a method of consolidating a fiberboard mat into a fiberboard panel comprising disposing a fiberboard mat between a first die and a second die during hot-press consolidation thereof into a structural panel; and pressing said fiberboard mat between said first and second dies under heat and pressure to consolidate said fiberboard mat into a structural panel, the improvement comprising:said second die including a plurality of spaced tapered projections extending vertically from a base thereof such that upon pressing under heat and pressure during consolidation of said mat into a fiberboard panel, said projections are pressed into said fiberboard mat, thereby causing some of the fibers in said fiberboard mat to flow laterally around an outer surface of said tapered projections during consolidation such that the resulting consolidated fiberboard panel includes fiber-void regions in one major surface thereof, corresponding in location to said projections on said die, while maintaining density uniformity in the fiberboard panel.