loom machine is a kind of shuttleless loom. It is a general loom for weaving
medium and small batches of colored fabrics with frequent variety modification.
In the production process, rapier loom high-speed weft insertion, rapier head
and rapier belt consumption accounted for more than half of the total material
consumption of rapier loom. Therefore, how to effectively avoid the wear of
rapier head and rapier belt is very important to save production costs.
Harm of wear and tear
loom running 400 revolutions per minute and 20 hours per day, the rapier head
reciprocates 960,000 times per day, which is unavoidable to wear and tear
during long-term operation. The most easily worn parts of the sword head are
the head, wings and bottom. Every time weft insertion occurs, the head of the
sword will be rubbed by warp yarn, guide hook, sword board and guide rail when
entering and withdrawing the sword. When the two wings of the sword head are
worn seriously and form a knife-edge shape, it is easy to cause warp yarn
broken ends, and even make the sword head jump out of the shuttle without the
control of the guide hook, resulting in a large number of broken ends.
Causes of wear
wear of rapier loom machine
head on rapier loom is also closely related to the
weaving variety. The wear of rapier head on different varieties is different.Wear
of sword head is serious and its service life is short for coarse yarn count
and high warp density fabrics.
service life of chemical fiber products is shorter, because the head of the
sword rubs and heats up on the chemical fiber warp yarn, which generates static
electricity and makes the bottom of the sword head condense a layer of
hardening material, which is easy to hang the warp yarn. The size composition
used in warp sizing also has a great influence on the wear degree of the sword
Different size composition also has different influence on the wear of
the sword head.
technological structure of rapier loom machine
is also related to the abrasion
of rapier head, especially the higher the height of back beam and the higher
the tension of bottom warp yarn, the worse the abrasion of rapier head. Because
the tension of the lower warp yarn is high, when the shed closes gradually, the
upper warp yarn lifting of the lower warp makes the upper lifting force of the
supporting blade head increase correspondingly, and the greater the extrusion
friction force of the guide hook, the greater the wear of the blade head.
How to prevent wear and tear?
tightness of time coordination between rapier weft insertion and warp yarn
opening directly affects the wear of rapier head. The opening time of warp yarn
is too early, the contact between weft feeding rapier head and warp yarn is
less, and the contact between rapier head and warp yarn is more when the rapier
is withdrawn, so the friction and extrusion between rapier head and warp yarn
are more. Similarly, when the opening time of warp yarn is delayed, the contact
between the blade and warp yarn will be less, but the weft feeding blade and
warp yarn will contact more, so the friction and extrusion between the blade
and warp yarn will be more. When choosing the size composition used in warp
sizing, chemical size should be selected to reduce the wear of sizing on the
blade head, which can greatly prolong the service life of the blade head. At
the same time, it is very important to further study the coating technology of
the rapier head and enhance the wear resistance of the surface coating of the
rapier head for prolonging the life of the rapier head.