Spinning process and device for the production of a yarn
AssigneeSchubert & Salzer Maschinenfabrik Aktiengesellschaft
InventorsJohann Rottmayr, Werner Billner
Life of this patent
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Abstract
The instant invention relates to a spinning process and to a device for the production of a yarn. In the spinning process the fibers are conveyed to a perforated collection surface which is subjected to suction in one zone. They are brought together into a fiber accumulation on the collection surface. The fiber accumulation is drawn off from the collection surface and twisted into a yarn of predetermined twist in a twisting element which follows the collection surface in the direction of yarn draw-off. The fibers are accumulated at a suction edge constituting a collection line and are pre-twisted at said collection line.
Claims17
An apparatus for spinning yarn from fibers, comprising:
- a perforated fiber collection surface for collecting fibers, said collection surface having a pre-determined pattern of perforations defined therein arranged along a main sense of orientation, said fiber collection surface adapted for being rotated at a pre-determined rotational speed;
- a suction insert disposed generally under said collection surface and adapted to draw air through said perforations moving across a defined suction zone, whereby fibers are drawn to said collection surface and held against said collection surface along said main sense of orientation as said fiber collection surface rotates through said suction zone;
- a suction edge forming a collection line for said fibers at a pre-determined angle relative to a perpendicular line to the direction of movement of said collection surface, said suction edge defining the furthest boundary of said suction zone relative the rotational direction of said fiber collection surface whereby as said fibers are carried past said suction edge they leave said collection surface due to centrifugal forces and are drawn back into said suction zone by said suction insert, said fibers thereby gathering along said suction edge forming a fiber accumulation along said collection line, said fiber accumulation thereby having a pre-twist imparted thereto from the interaction of said centrifugal forces and said suction forces, said main sense of orientation of said perforations forming a predetermined non-zero angle with said collection line;
- and
- a twisting element comprising a pair of friction rollers, said fiber accumulation being drawn through said twisting element by yarn draw-off means, said twisting element disposed in-line relative the direction of yarn draw-off between said collection line and said yarn draw-off means, said twisting element configured to impart a final twist to said fiber accumulation thereby forming yarn having a predetermined degree of twist from said fiber accumulation.
A spinning process for producing yarn, said process comprising the steps of:
- defining suction holes in a spinning perforated collection surface along a predetermined main sense of orientation;
- drawing air through the suction holes in a suction zone of the collection surface;
- defining a collection line on the collection surface at a predetermined angle relative to a line perpendicular to the direction of movement of the spinning collection surface, the collection line being an edge of the suction zone, the main sense of orientation of the suction holes forming a predetermined non-zero angle with the collection line;
- introducing yarn fibers onto the spinning perforated collection surface at the suction zone so that the yarn fibers are orientated on the collection surface along the main sense of orientation of the suction holes;
- conveying the yarn fibers through the suction zone orientated along the main sense of orientation of the suction holes to the collection line;
- forming the yarn fibers into fiber accumulation along the collection line;
- pre-twisting the fiber accumulation at the collection line;
- and
- final twisting the fiber accumulation into a yarn with a pair of friction rollers disposed in-line relative the collection line in the direction of yarn draw-off, said final twisting being at a greater speed than said pre-twisting.
Dependencies are inferred from the claim text.