Process and device for disintegrating irregularities in flows of wood fibres

A process for disintegrating irregularities in a flow of wood fibers, said process comprising the steps of:

• feeding said flow of wood fibers to a spinning disintegrating roller having a plurality of pins extending outwardly therefrom;
• deflecting said flow of wood fibers through contact with said pins;
• directing said deflected wood fibers along a chute which is defined in part by a section of a periphery of the disintegrating roller;
• drawing said flow of wood fibers from said disintegrating roller into a thin film;
• and
• sifting said fibers to remove coarse material therefrom by an air flow exerted on said wood fibers.

A process for disintegrating irregularities in a flow of wood fibers which are discharged from a metering device and designated for the production of fiberboards, said process comprising the steps of:

• feeding said flow of wood fibers from said metering device through a feed chute to a spinning disintegrating roller having a plurality of pins extending outwardly therefrom;
• deflecting said flow of wood fibers through contact with said pins;
• directing said deflected wood fibers along a chute which is defined at least in part by a section of a periphery of the disintegrating roller and an opposite wall;
• drawing said flow of wood fibers from said disintegrating roller into a thin film;
• discharging said thin film from said chute through an outlet orifice in a substantially horizontal orientation;
• sifting said fibers to remove coarse material therefrom by drawing a negative pressure to produce an air flow exerted in one of two directions, upwardly and downwardly, on said wood fibers thereby entraining said fibers, said coarse material being separated by gravity;
• and
• directing said coarse material to a coarse material outlet.

A device for disintegrating irregularities in a flow of wood fibers, said device comprising:

• a metering device having an outlet for discharging said fibers;
• a feed chute positioned to receive said fibers discharged from said metering device;
• a disintegrating roller positioned to receive said fibers from said feed chute, said roller being rotatable and having a plurality of pins extending outwardly therefrom;
• a chute section defined by a sidewall positioned adjacent to said roller and a section of a periphery of said roller, said chute section extending around said roller in the direction of roller rotation, said fibers being deflected by impingement with said pins when said roller is rotating, said chute section having an outlet orifice for discharging said fibers therefrom;
• an air duct positioned to direct an air flow into said fibers discharged from said chute section, said air flow separating said fibers from coarse material associated therewith, said air flow being exerted on said wood fibers in one of two directions, upwardly and downwardly, and
• a coarse material discharge chute having an outlet at one end and an inlet at an opposite end, said inlet being positioned facing said outlet orifice for receiving coarse material discharged from said chute section.