_________________________________________________________________________________
Rapier
loom is a shuttleless weaving loom in which the filling yarn is carried through
the shed of warp yarns to the other side of the loom by finger like carriers
called rapiers. As in the projectile loom, a
stationary package of yarn
is used to supply the weft yarns in the rapier
machine. One end of a rapier, a rod or steel tape, carries the weft yarn. The
other end of the rapier is
connected to the control system .The rapier moves across the
width of the fabric, carrying the weft yarn across through the shed to the opposite side. The rapier is then retracted, leaving the new filling in place.
Rapier
loom is a shuttleless weaving loom in which the filling yarn is carried through
the shed of warp yarns to the other side of the loom by finger like carriers
called rapiers. As in the projectile loom, a
stationary package of yarn connected to the control system .The rapier moves across the
width of the fabric, carrying the weft yarn across through the shed to the opposite side. The rapier is then retracted, leaving the new filling in place.
In some versions of the machine, two rapiers are used, each
half the width of the fabric in size. One rapier carries the yarn to the center
of the shed, where the opposing rapier picks up the yarn and carries it the
remainder of the way across the shed. A disadvantage of both these techniques
is the space required for the machine if a rigid rapier is used. The housing
for the rapiers must take up as much space as the width of the machine. To
overcome this problem, looms with flexible rapiers have been devised. The
flexible rapier can be coiled as it is withdrawn and will therefore require
less space. However, if the rapier is too stiff, it will not coil; if it is too
flexible, it will buckle. The double rapier is used more frequently than the
single rapier. Rigid and flexible rapier machines operate at speeds of up to
1,300 meters of weft per minute. These rapier looms are efficient. They operate
at speeds ranging from about 200 to 260 ppm at about the noise level of
projectile looms. They can produce a wide variety of fabrics ranging from
muslin to drapery and upholstery materials.
 |
The operation principle of three
rapier systems
|
Newer rapier machines are built with two distinct weaving areas
for two separate fabrics. On such machines, one rapier picks up the yarn from
the center, between the two fabrics, and carries it across one weaving area; as
it finishes laying that pick, the opposite end of the rapier picks up another
yarn from the center, and the rapier moves in the other direction to lay a pick
for the second weaving area, on the other half of the machine. The above figure
shows the action on a single width of fabric for a single rigid rapier system,
a double rigid rapier system, and a double flexible rapier system .
Rapier machines weave more rapidly than most shuttle machines but more slowly than most projectile machines. An important advantage of rapier machines is their flexibility, which perm it’s the laying of picks of different colors. They also weave yarns of any type of fiber and can weave fabrics up to 110 inches in width without modification.
Rapier machines weave more rapidly than most shuttle machines but more slowly than most projectile machines. An important advantage of rapier machines is their flexibility, which perm it’s the laying of picks of different colors. They also weave yarns of any type of fiber and can weave fabrics up to 110 inches in width without modification.
A stationary package of yarn is used to supply the weft
yarns in the rapier machine. One end of a rapier, a rod or steel tape, carries
the weft yarn. The other end of the rapier is connected to the control system.
The rapier moves across the width of the fabric, carrying the weft yarn across
through the shed to the opposite side. The rapier is then retracted, leaving
the new pick in place.
In some versions of the loom, two rapiers are used,
each half the width of the fabric in size. One rapier carries the yarn to the
centre of the shed, where the opposing rapier picks up the yarn and carries it
the remainder of the way across the shed. The double rapier is used more
frequently than the single rapier due to its increases pick insertion speed and
ability to weave wider widths of fabric. The housing for the rapiers must take
up as much space as the width of the machine. To overcome this problem, looms
with flexible rapiers have been devised. The flexible rapier can be coiled as
it is withdrawn, therefore requiring less storage space. If, however, the
rapier is too stiff then it will not coil; If it is too flexible, it will
buckle. Rigid and flexible rapier machines operate at speeds operating at speeds
ranging from about 200 to 260 ppm, using up to 1300 meters of weft yarn every
minute. They have a noise level similar to that of modern projectile looms.
They can produce a wide variety of fabrics ranging from muslin to drapery and
upholstery materials.
Newer rapier machines are built with two distinct
weaving areas for two separate fabrics. On such machines, one rapier picks up
the yarn from the center, between the two fabrics, and carries it across one
weaving area; as it finishes laying that pick, the opposite end of the rapier
picks up another yarn from the center, and the rapier moves in the other
direction to lay a pick for the second weaving area, on the other half of the
machine. The above figure shows the action on a single width of fabric for a single
rigid rapier system, a double rigid rapier system, and a double flexible rapier
system .
Rapier machines weave more rapidly than most shuttle
machines but more slowly than most other projectile machines. An important
advantage of rapier machines is their flexibility, which permits the laying of
picks of different colors. They also weave yarns of any type of fiber and can
weave fabrics up to 110 inches in width without modification.
Thanks...
====> Always feel free to SHARE so that your friends can can know these
informations.
<> ♦♣♠ ♠♣♦ <>
Don’t forget to vote for this blog and
also feel free to rate the posts.
Thanks again. :)
__________________________-___________________________
No comments:
Post a Comment