Process and device for gluing dried fibers designated for the production of fiberboards

A process of gluing dried fibers which are designated for the production of fiberboards, comprising the following steps:

• (a) supplying said fibers to a fiber roller, said fibers being supplied by a metering device through a feed chute, said fiber roller having a plurality of pins, said metering device having an outlet and said feed chute having an outlet orifice;
• (b) deflecting said fibers by rotating said fiber roller so as to deflect said fibers by said pins, said fibers being directed along a chute section which is defined by a partial section of the periphery of the fiber roller and a wall lying opposite said partial section of the periphery of the fiber roller and which chute section extends from said outlet orifice of said feed chute in a rotational direction of said fiber roller, wherein said fibers are accelerated to approximately a peripheral speed of the fiber roller by the rotation of said pins and an air flow generated by said pins;
• (c) exiting said fibers from an outlet orifice of said chute section in a substantially horizontal direction;
• (d) deflecting said fibers upward in a deflection region of a pneumatic conveying device, said pneumatic conveying device having an inlet disposed adjacent to said outlet orifice of said chute section;
• and
• (e) gluing said fibers when being deflected with at least one spray nozzle which expels glue and air.

A device for gluing dried fibers which are designated for the production of fiberboards, comprising:

• a fiber metering device having an outlet;
• a feed chute positioned to receive the fibers from the outlet of said metering device and which can be subjected to a negative pressure, said feed chute having an outlet orifice;
• a fiber roller positioned to receive the fibers from said feed chute, said fiber roller having a plurality of pins and is capable of being rotated such that the fibers impinging upon the fiber roller are deflected by the pins;
• a chute section along which said fibers are directed and accelerated to approximately a peripheral speed of the fiber roller by means of the pins and an air flow generated by said pins, said chute section being defined by a partial section of the periphery of the fiber roller and a wall lying opposite said roller, said chute section extending from said outlet orifice of the feed chute in a rotational direction of the fiber roller, said chute section having an outlet orifice through which the fibers are expelled in a substantially horizontal direction;
• a pneumatic conveying device having an inlet disposed adjacent to said outlet orifice of the chute section for receiving the fibers therefrom, said pneumatic conveying device having a deflection region in which the fibers are deflected in a downward direction;
• and
• spray nozzles disposed in said deflection region for gluing the fibers by expelling glue and air.

A device for gluing dried fibers which are designated for the production of fiberboards, comprising:

• a fiber metering device having an outlet;
• a feed chute positioned to receive the fibers from the outlet of said metering device and which can be subjected to a negative pressure, said feed chute having an outlet orifice;
• a fiber roller positioned to receive the fibers from said feed chute, said fiber roller having a plurality of pins and is capable of being rotated such that the fibers impinging upon the fiber roller are deflected by the pins;
• a chute section along which said fibers are directed and accelerated to approximately a peripheral speed of the fiber roller by means of the pins and an air flow generated by said pins, said chute section being defined by a partial section of the periphery of the fiber roller and a wall lying opposite said roller, said chute section extending from said outlet orifice of the feed chute in a rotational direction of the fiber roller, said chute section having an outlet orifice through which the fibers are expelled in a substantially horizontal direction;
• a pneumatic conveying device having an inlet disposed adjacent to said outlet orifice of the chute section for receiving the fibers therefrom, said pneumatic conveying device having a deflection region in which the fibers are deflected in an upward direction;
• and
• spray nozzles disposed in said deflection region for gluing the fibers by expelling glue and air.