Molded non-planar board and method and apparatus for making same

Details Molded non-planar board and method and apparatus for making same Molded non-planar board and method and apparatus for making same

1993-06-30

1996-02-06

Bray, W. Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

144 2R, 144362, 428136, 428191, 428156, B32B 512, B27M 102

Patent

active

054894603

ABSTRACT:
A plurality of intermittent incisions are made in the surface region of a fiberboard to sever fibers without removing them from said region. The resultant fiberboard may be molded under heat and pressure to a three dimensional hardboard with high fidelity to the mold and without causing stretch marks, tears or fractures. The fiberboard may be a dry consolidated mass of wet felted cellulosic fibers. The invention is particularly valuable in the molding of boards made from redwood fibers and other long fibers.
The intermittent incisions may be made along one or more lines parallel to or perpendicular to the longitudinal edge of the fiberboard but a grid of incisions along intersecting lines is advantageous. To cut the incisions, the fiberboard is moved on a conveyor belt while an assemblage of toothed cutting disks is rotated in cutting engagement with the board. The cutting disks are mounted co-axially on a motor-driven shaft.

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