Sunds Defibrator Woodhandling Oy

Sunds Defibrator Woodhanding Oy

Hannu Tahkanen

Arvo Jonkka

Antti Tohkala

Timothy P Nettles

Alpo Kalliokoski

Pauli Vienola

Aaro Klaavu

Paul Roux

A method and a feeding chute for feeding logs (10) into a disc chipper by means of the gravity. The logs (10) are supported laterally by means of adjacent bottom portions (31, 32) of the chute (3) and shoulders between those. The logs are turned parallel with the longitudinal direction of the chute by means of a moment (M) which occurs when the direction of the main axis (27) of the ellipse forming the shearing surface of the log deviates from the direction (27') perpendicular to a the direct line (30) drawn via the rotating center (28) of the blade disc and the center (29) of the ellipse. The bottom portions (31, 32) of the chute are inclined around a longitudinal axis in such a way that from two adjacent bottom portions of the chute, the one (31) further away from the rotating axis of the disc forms a bigger angle (.beta.') with respect to the horizontal plane than the angle (.beta.') formed by the portion (32) closer to the rotating axis.

Feeding method and feeding chute of disc chipper

A method for improving the endurance of a blade base (6) of the disc (1) of a disc chipper, a blade base and a disc chipper. A wearing plate (10) is attached to the surface (18) of the blade base facing towards the chip opening (7), the wearing surface (10) of which is shot peened.

Method for improving the endurance of a blade base of a disc chipper, a

A chipping control device (9) to be mounted on a disc chipper and a disc chipper for keeping the piece size of the chips (8) removed from the wood (1) with a chipper blade (6) uniform. The chipping control device (9) is mounted on the outer surface of the blade disc (4) on the opposite side of the blade (6) such that the control device (9), when using the chipper, contacts the chips (7, 8) leaving the chipping opening (13).

Chipping control device and disc chipper

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Rauma, Finland

Hannu Tahkanen