Wood chip optimizer

Details Wood chip optimizer Wood chip optimizer

1997-02-07

1998-12-01

Bray, W. Donald

Woodworking

Process

Mechanical cutting or shaping

100176, 241 2429, 241 28, 241235, 144 21, B27M 102, B27B 920

Patent

active

058425071

ABSTRACT:
A wood chip conditioner that uses at least two closely spaced, counter-rotating rolls having a regular, wave shaped profile formed into their surfaces having a repeating pattern of peaks and valleys that radially circumscribes the roll and which are preferably the same dimension and offset from each other so that a peak on one roll is in registry with a valley on the other roll and form a nip through which oversized wood chips traverse. The chips passing through the nip are destructured by being bent and compressed by the surfaces on the rolls, which produces internal cracks along the grain of the wood without penetrating the chips. The rolls are also designed to avoid breaking or fracturing the chips, which would increase the occurrence of undesirable pins and fines. The surface of the peaks preferably also have shallow, equally-spaced grooves that extend axially. The grooves provide an edge that catches and pulls the chips into and through the nip. The bending action to which the chips traversing through the nip are subjected also loosens or dislodges the bark on the outer surface of the chips by breaking the bond between the bark and the chip. The present invention also includes a method of using the wood chip conditioner to destructure and remove moisture from fuel chips.

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