Yarn Warping:
Warping
is the first step of fabric manufacturing. After winding yarn packages are
undergoing warping process to prepare warp beam. The objective of warping
process is to convert the yarn packages into a warper’s beam having desired
width and containing requisite number of ends. Uniform tension is maintained on
individual yarns during warping. The yarns are would on the warper’s beam in
the form of a sheet composed of parallel bands of yarns each coming out from a
package placed on the creel. The latest beam warping machines have a very
simple design, which results in higher speed & consequently in output
increase. In order to keep pace with the ever-growing demand of increasing
productivity, many developments and automations are done in the High-Speed
Warping Machine. In warping pressure is applied on the warp beam to prepare
uniform and circular warp beam. This pressure applied on the beam maintain
uniform density and hardness of the beam. Soft beam shows lower beam content,
conical cross-section of the beam and missing end problem, thus it is important
to apply tension on the warp beam.
The amount of increase in the beam
drum pressure related with the elongation of the warp yarn during the warping.
The number of cut yarns increases when the yarns are intruded from the guide
reed. When the amount of tension increases on the warp yarns the breakage rate
increases because of the increase in the beam drum pressure. Thus, lower the
beam drum pressure, lower will be the breakage rate at warping, leads to increase
the production rate. Thus, beam pressure is to be optimized set to get lower
end breakages at lower beam pressure as well as higher warp content with higher
beam pressure. The quality of the warp beam i.e. number of breaks, loss in yarn
quality during warping highly affects the warp breakage rate at sizing and
weaving. If the number of breakages is more in warping more breakages will
occur in sizing and subsequently in weaving. Quality of the fabric weave and
number of defects depends up on the breakages occurred in the loom.
The
quality of the warp beam affects the productivity of the loom shed. It is
important to prepare the warp beam at warping which can run on sizing and
weaving machine with highest efficiency. As the number of end breakages on warping
machine is a direct indicator of warp beam quality attempts are made to
optimize the number of end breakages on warping with respect to speed and beam
pressure during the warping. The speed of the warping and beam pressure have
significant impact on the number of breakages. This impact is different for the
different count range of the warp yarn in the warping process. The objective of
this project was to find out the optimum speed and beam pressure for different
sorts of the fabric running in the loom shed.
The
parallel winding of warp yarns from different winding packages like cones,
cheeses, spools, Warper’s bobbin into a sheet form is called Warping.
Warping is the parallel winding of yarn from the cone or the cheese package on
to a warp beam. The operation of winding warp yarns onto a beam usually used in
preparation for slashing,
weaving, or warp knitting.
Also called warping.
It
is the process of preparing a double flange beam of warp yarns arranged
parallel to each other.
The
objective of the warping process is to convert the yarn packages into
a Warper’s beam having the desired width and containing the requisite
number of ends.
The
yarns are wound onto the Warper’s beam in the form of a sheet
composed of parallel bands of yarns, each coming out from a package placed on
the creel.
- Warp
preparation transfers the ground yarn from the spinner’s cheeses onto a ground
beam and the pile yarn onto a pile beam.
- Cones
of warp yarns are arranged in a framework called a creel and wound directly
onto each beam. This process is called direct warping.
- There
are hundreds of (up to 600) cones per warping machine.
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