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As the name suggests, automatic pirn change weaving looms are those looms that re<br />
designed to automatically change the prins without any required manual tasks. <strong>The</strong>se<br />
weaving looms are used to weave various types of fabrics in different garment mills, and<br />
are available in different specifications to suit various application requirements. <strong>The</strong>y offer<br />
smooth operation, long functional life, and minimum maintenance, all in a very compact<br />
design. Furthermore, they have many other distinctive features, such as –<br />
<strong>Automatic</strong> operation<br />
At the time of weft pirn changing, the weft end of the new pirn is drawn out penetrating<br />
through the weft tensions on the shuttle. Thus, the entire process is a man-less operation<br />
with no know on the weft yarn, causing no issues when the weft pirn is changed.<br />
Shuttles and bobbins<br />
Standard shuttles and weft pirn bobbins are used for all kinds of yarns, which make<br />
weaving very efficient and of high quality.<br />
Faultless weaving<br />
<strong>The</strong> remnant weft yarns are disposed, which doesn’t make them appear on the woven<br />
cloth, which in turn results in faultless weaving. Furthermore, the interval time for cop<br />
changing is only about 9.5 seconds for 60 Hz.<br />
Multi coloured wefts
Certain looms have 1×1, 2×1, and 4×1 shuttle boxes, which enables multicoloured weft<br />
yarns to be woven easily.<br />
Micro-computer control cam mechanism<br />
<strong>The</strong> cam control mechanism in the weaving loom enables effective automation, and is also<br />
easy to operate and maintain.<br />
<strong>The</strong> mechanism of these looms<br />
In an automatic pirn change weaving loom, the yarn extending from the cloth to the shuttle<br />
is cut near the shuttle, and the runout pirn is removed from the shuttle, thus unthreading<br />
the shuttle eye. <strong>The</strong>n, the new pirn is inserted into the shuttle with the end of the yarn held<br />
in a clamp. When the shuttle makes a first stroke with the pirn, the weft yarn is<br />
automatically drawn into the shuttle eye. <strong>The</strong>n, the old and new ends of the yarn are cut off<br />
by selvedge cutters located adjacent to the cloth.<br />
A transfer head is preferably provided for extracting the almost runout pirn from the<br />
shuttle and inserting the full pirn. This transfer head is adapted to move between two<br />
angularly space apart fixed positions, with one positioned for gripping a pirn in the shuttle,<br />
and the second positioned to be stationary beneath the transfer head.<br />
<strong>The</strong> joint comprises of a knotter that is adapted to receive at least a portion of the wire<br />
extending from the almost runout pirn to the shuttle eye, where the pirn is moved by the<br />
transfer head. It is also designed to receive a portion of the wire extending from a full pirn,<br />
when this pirn is moved by the transfer head. <strong>The</strong> stripper draws off the remaining wire<br />
from the runout pirn when the latter has been extracted from the shuttle and placed in the<br />
second position.<br />
To get the best quality pirns for using for fabric weaving, you can approach Trim<br />
Engineering Services, the leading pirn manufacturers in India, who not only supply their<br />
products to India, but also to countries like France, Italy, Spain, Germany, America, Brazil,<br />
Romania, Sri Lanka, Thailand, Malaysia, South Africa, Indonesia, Poland, and Israel; thus<br />
bringing them a global presence.<br />
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