Device and process for simultaneously winding several separate fibers on a rotating support
AssigneeVetrotex Saint-Gobain
InventorsGeorges Billard, Francoise Blanchard, Willy Klemenz, Roger Combet, Daniel Richard
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Abstract
The invention relates to a winding device and process to produce packages from several separate continuous fibers. The installation of this invention includes a spinneret receiving a thermoplastic material in the molten state, a rotating spindle carrying a support and drawing strands of material from the orifices of the spinneret and winding of the resulting fibers, a gathering and guiding device and a crisscrossing device including a fiber guide with an opening opposite the spindle communicating with an interior guide zone provided with at least two notches on its periphery.
Claims11
Apparatus for forming and winding on the same support several continuous fibers of thermoplastic material comprising:
- a spinneret receiving said thermoplastic material and keeping said thermoplastic material in a molten state;
- a rotating spindle carrying said support and mechanically drawing strands of said material from orifices of said spinneret in the form of elementary filaments;
- a gathering and guide device to group said filaments into at least two separate fibers and to guide said fibers to said spindle;
- a crisscrossing device near the spindle including a fiber guide driven back and forth by said crisscrossing device along a line of travel in front of said spindle, said fiber guide positively guiding said fibers and moving them back-and-forth to distribute said fibers on said support, said fiber guide having an opening in front of said spindle communicating with an interior guide zone of said fiber guide, at least two notches in said fiber guide communicating with and opening into said interior zone;
- and
- a stop positioned near each end of travel of said fiber guide for engaging at least the outside one of said fibers when said fiber guide reaches its end of travel.
A process for producing and winding of several continuous fibers of thermoplastic material on the same support positioned on a rotating spindle, consisting of the steps of:
- drawing mechanically material coming from the orifices of a spinneret in the form of elementary filaments under the action of the rotation of said spindle;
- separating the filaments into at least two strands;
- gathering the filaments of each strand into fibers;
- maintaining the separation of said fibers by at least an upper comb and at least a lower comb;
- further maintaining the separation of said fibers by locating said lower comb outside the zone between two planes passing through the ends of travel of a fiber guide on a crisscrossing machine and perpendicular to the back-and-forth movement of said fiber guide;
- and
- distributing said fibers on a support by use of said fiber guide driven in a back-and-forth movement parallel to the axis of rotation of said spindle.
Dependencies are inferred from the claim text.