Andritz Oy

Bruce Kirkpatrick

Pekka Kokko

Jouni Havumaki

The invention relates to a debarking shaft arrangement for a debarking machine ( ). A number of rotatable debarking shafts ( ) extending parallel to the advancing direction of the logs ( ) are provided with a number of teeth ( ) extending beyond the circumferential surface of the shaft ( ) and adapted to strip bark off the logs transversely to the lengthwise direction of the logs. The teeth ( ) are designed to be effective in both rotating directions of said rotatable debarking shafts ( ), and the debarking shafts ( ) are designed to be reversibly mounted in the debarking machine. Reversible debarking shafts equipped with bi-directionally effective teeth permit renewal of worn teeth on a debarking shaft by reversing the orientation of the shaft relative to the debarking machine.

Arrangement for a debarking shaft

The invention relates to a debarking machine for the debarking of logs and for the expulsion of at least some of the removed bark from a wood flow passing through the debarking machine. The debarking machine having a number of rotating debarking shafts extending parallel to an advancing direction (A) of the logs to be fed therethrough. The debarking shafts are provided with a number of teeth adapted to strip bark off the logs transversely to the lengthwise direction of the logs and at the same time to convey the logs transversely relative to said shafts. The shafts, together with the teeth thereof constitute at least a section of a support surface upon which the logs travel through the debarking machine. For feeding the logs into the debarking machine, its admission end is provided with a conveyor adapted to positively feed the logs through an opening in the admission end of the debarking machine. The feed rate and feed force of the conveyor are preferably regulated.

Debarking machine

The invention relates to a debarking shaft ( ) for a debarking machine ( ). The debarking shaft ( ) has its teeth ( ) designed as a number of annular tooth rims ( ), each of said tooth rims comprising two or more releasably connected elements ( ), having the outer periphery provided with the teeth ( ) and said elements being adapted to be fitted around a body member ( ) of the debarking shaft ( ) by way of press clamping.

Debarking shaft for a debarking machine

The invention relates to an arrangement at the discharge end of a debarking machine ( ) for the preliminary debarking of logs ( ) prior to a separately performed final barking and for the expulsion of at least some of the removed barks from a wood flow passing through the debarking machine. The debarking machine ( ) has its discharge side provided with an extension ( ), continuing from the lower section level of the support surface of the debarking machine used for bearing the logs ( ), and guiding the logs ( ) discharging out of the debarking machine ( ). The extension may include a variable speed conveyor ( ), varying the speed of which influences the admission rate of logs into the debarking machine and the dwell time of logs therein.

Growing community of inventors

Lachine, Canada

Bruce Kirkpatrick