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Launch nozzle with weft retaining means for a pneumatic weaving loom

A jet nozzle, air jet loom technology, used in looms, textiles, textiles and papermaking, etc., can solve problems such as yarn damage, no satisfaction, yarn wear, etc.

Active Publication Date: 2010-09-29
ITEMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution, which relies on rigid conical protrusions, does not give satisfactory results, since the weft yarn tends to get entangled in the notches even in the case of regular air flow re-establishment
In addition, the sharp edges of the notch may cause damage to the yarn
Finally, when tapered holes are used for better projection handling, high pressure losses and significant wear of the yarn occur

Method used

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  • Launch nozzle with weft retaining means for a pneumatic weaving loom
  • Launch nozzle with weft retaining means for a pneumatic weaving loom
  • Launch nozzle with weft retaining means for a pneumatic weaving loom

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Embodiment Construction

[0027] The nozzle arrangement according to the invention has a very similar construction to prior art nozzle arrangements and is therefore completely replaceable in prior art systems and weaving machines. There are no actuators on the block: thus completely avoiding any additional control between the main drive of the loom and the nozzles.

[0028] Furthermore, according to the invention, within the main body 3 of the spray bar 4 there is a tubular support 31 , from which the tubular support 31 branches off flexible tufts or groups of bristles 32 . from Figure 5 It can be clearly seen that the bristles 32 are distributed over the circumference of the trailing edge downstream of the support body 31 and extend substantially along the longitudinal axis of the nozzle opening of the base body 3 , ie along the longitudinal axis of the spray bar 4 .

[0029] The tubular support 31 is preferably shaped as a ring structure of plastic material combined with the bristles 32, but other ...

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Abstract

A launch nozzle for a weft thread in a pneumatic weaving loom is disclosed, of the type comprising at least one lance (4), which extends from a respective base body (3), provided with a through-hole in which it is possible to establish a compressed air flow, ciliated means (31, 32) being inserted in the base body (3) provided with a central gap for said compressed air.

Description

technical field [0001] The present invention relates to an improved jet nozzle for an air jet loom. Background technique [0002] As we all know, using a loom to weave needs to introduce a series of transverse weft yarns into a set of parallel warp yarns, and use the loom to open the sheared yarns according to different and preset patterns. At each weft insertion, the weft yarn is struck by the reed onto the fabric being formed, and this cycle is repeated at very high speeds, reaching 1200-1500 blows per minute. [0003] The introduction of the weft thread into the warp shed can be achieved by various techniques. In air-jet looms, weft insertion is carried out by blowing the weft yarn with an air stream which is ejected through a suitable jet nozzle at the entrance of the warp shed; The air flow causes the weft yarn to travel towards the shed exit on the other side of the loom. [0004] figure 1 Schematically shows the device in the loom for weft insertion. It can be cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D47/30
CPCD03D47/3013
Inventor O·卡皮塔尼奥C·兰扎D·马卡布鲁尼
Owner ITEMA