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The fibers in the corded sliver are
placed in a very haphazard fashion and the sliver lack
uniformity as regard with par unit of length. Hence, in
order lo produce quality of yarn; it is necessary to improve
the uniformity of the slivers fed and to parallelize the
fibers before they can be drawn out in the finer yarn form.
Then the carded slivers are processed on the drawing frame,
they are made uniform in the thickness by the doubling
process and the fibers get drawn parallel to the axis of the
sliver by the drafting process. Now, hence
the slivers are to be thinned out to the level required for
the yarn to be spun. This process of attenuating the slivers
is done in several steps on the Speed Frames. While
converting slivers into roving, a small amount of twist is
also inserted so that the roving could with-stand the
winding and the unwinding tensions. The roving is would on
suitable bobbins. Under conventional system of fly frames
process, the machine use in this department are slubbing
frame, intermediate frames and roving frames. Except as
regard the numbers of spindles speed and dimensions of
bobbins, the object structure and machine of all these
frames are practically the same. The attention
of the sliver is done gradually at each
of these fly frames, depending upon the draft capacity of
the machines. The drafting system employed determines the
quality of the roving produced at the fly frames. All the
advantage in technology the slubbing and roving process is
climinated and the material in processed through only the
passage of fly frames, viz. the canfed incer frames. |