PRECAUTIONS OF WARPING PROCESS
PRECAUTIONS OF DIRECT OR BEAM WARPING PROCESS:
Following
precautions should be taken during the process of director beam warping.
· * The
tension on the every warp end should be proper and equal.
· * The
cleaning of tensioner should be done at each creel change properly on regular bases.
· * The
the number of yarn separation guides should be according to the length of the creel. If the guides are not sufficient, the ends may be entengled to each other.
· * The
warp end located at the back side of creel slackens due to own weight. These ends
located at the rare side of creel wrapped in both sides of the beam. During sizing
these ends get loosed and create the problem of bowing in the fabric. Thus
the tension of the ends is maintained according to location. Rare ends require
more tension than ends located at the front side of the creel.
· * The
tension should be selected in such a way that there is no false warp stop due to
ends slackening.
· * The
number of washers and their weight should always be adjusted after a change in
warp count.
· * The
drop wire should work properly.
· * The
the electrode of warp stop motion should be cleaned by any cleaning liquid to avoid
failure of warp stop motion.
· * The
warp ends should be drawn in the correct sequence to avoid end breakage.
· * The
reed width should be adjusted properly, improper adjustment causes loose ends
at each side of the beam.
· * There
should be no short end in the beam.
· * Short
end in the warper’s beam cause lappers and creates end breakage during sizing
process.
· * The
warping pressure should be selected properly. If the pressure is too high, it may
cause yarn rupture. If the pressure is too low, it may cause warp slippage on the
beam.
· * The
short ends should be mend during the process correctly.
· * Machine
the brake should work precisely.
· * The
oil level in the hydraulic system should be maintained regularly.
· *The
edges of flanges should not be sharp.
· * Skip
denting order should not be used if possible. There should be changed the reed.
· * The
the pitch of the creel should be selected precisely to avoid touching the surface
of yarn packages.
PRECAUTIONS OF SECTIONAL OR INDIRECT WARPING MACHINE:
Following precautions must be taken during
sectional warping process:
· * The
tension on each warp end should be equal and sufficient.
· * The
creel should be cleaned by compressed air after ever creel change.
· * The
package size should be equal. The size difference in packages creates uneven
tension on the ends.
· *The
distance between package and yarn guide should be proper and sufficient to minimize the diameter of balloon during unwinding of yarn from the package.
· * The
effective working of electrical stop motion should always be ensured.
· * The
distance between stop motion and lease reed should sufficient and proper. If it is too
low, it may cause unnecessary end breakages. The broken ends can pass into the beam. If this distance is too high, it may
cause excessive entanglement of ends which results in
the form of end breakages.
· * The
distance between lease reed and flat reed or v – shape reed should be correct
to minimize the end breakages at the reed.
· * Gears
selection should be as accurate as possible. Incorrect gears selection results
in the improper cone height of warp beam thus the diameter of the beam at one side
reduces or increases. This variation in diameter results in the form of bowing in
fabric.
· * The
warping speed should not be changed during process, speed change during the process
may change the length of section or tension of warp.
· * All
the sections should have an equal number of ends if possible.
· * Section width should be set correctly. If section width is less than required, there
will be a gap between adjacent sections and warp will get loosed at these
places. If it is more than required, the ends will be overlapped and it will
create end breakage during beaming and weaving..
· * There
should not pass any short end in the beam during warp. Short end crates lappers
and end breakage during beaming.
· * Every
short end should be repaired by reversing the machine in the back direction.
· * Efficient
working of brake should be ensured before operating the machine.
· * The
oil level in the hydraulic system maintained properly.
· * The
discs and brake shoe of the braking system should be cleaned by CTC or other
solvent according to maintenance schedule.
· * Wax,
cold binder or antistatic oil should be used if required.
· * Beaming
tension should be selected properly. The beam should be neither much compact
nor much loose.
· * Excess
beaming tension may create deformation in the yarn.
· The
flange to flange distance in the beam should be set correctly.
· * The
beam width should be two centimeters more than reed space used in the loom.
· * The
warp should be wound on the beam in the center of the barrel.
· * The beam flanges should be tightened properly.
· * The
the lease should be inserted correctly to prevent the end crossing problem.
· * the number of ends per dent in the flat or v – shape reed should be as minimum as
possible. An excess number of ends per dent in this reed results in the form of
rolling. This rolling creates ends crossing problem during unwinding of warp on
the loom.
· * Proper
working of the machine should be ensured by the empty running of the machine.
· * The
electrodes of warp stop motion should be cleaned periodically.
· * The
the roughness of the surface of the cone-shaped portion of the warping drum should be
maintained properly. If it becomes smooth, the slippage of sections on this
site may occur.
THE END
THE END
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