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Wefting inserter for air-jet loom

An air-jet loom and weft-inserting technology, which is applied in looms, textiles, textiles, and papermaking, can solve the problems of affecting the quality of wefts and hindering the high-speed air-jet loom, and achieve the effect of preventing twisting

Inactive Publication Date: 2007-03-21
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reverse flow exerts a traction force on the side opposite to the weft insertion direction to the weft yarn of the aforementioned yarn introduction tube 3, which is the main factor hindering the speed-up of the air-jet loom
In addition, the weft yarn 2 in the aforementioned yarn introduction tube 3 is exposed to reverse flow, which may affect the quality of the weft yarn

Method used

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  • Wefting inserter for air-jet loom
  • Wefting inserter for air-jet loom
  • Wefting inserter for air-jet loom

Examples

Experimental program
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Effect test

no. 1 approach

[0035] Hereinafter, a first embodiment will be described based on FIGS. 1 to 3 .

[0036] In FIG. 1, the arrangement|positioning position of the weft insertion nozzle 1 in the weft insertion device of an air-jet loom is shown. As is well known, the warp thread 2 sent out from the warp beam (not shown) is opened or closed by the heald frame 3 . The weft insertion nozzle 1 sprays the compressed air flow supplied from the unshown compressed air source through the switching rod and the pipe 4 during weft insertion, and penetrates the weft insertion through the unshown thread supply part through the weft thread length measurement and storage device. The weft threads 5 of the nozzle 1 are inserted into the warp thread openings. After the weft insertion is completed, the weft thread 5 is reeded by the reed 6 to form a woven cloth 7 .

[0037] The detailed structure of the weft insertion nozzle 1 is shown in Figures 2 and 3. The nozzle body 8 has a hole 9 penetrating substantially ...

no. 2 approach

[0054] In the second embodiment shown in FIGS. 4 and 5 , the arrangement positions of the second injection passages in the first embodiment described above are changed. Therefore, the same reference numerals are given to the same components as in the first embodiment described above, and description thereof will be omitted.

[0055] The second injection passage 40 in the second embodiment is arranged on the rectification piece 16 constituting a part of the rectification member 18 . That is, as shown clearly in Fig. 5, the inlet 41 opening of the second injection passage 40 is present on the wall surface of the first annular chamber 15 side of the rectifying piece 16 existing between each rectifying passage 17, and is projected outward in the rectifying piece 16. After the weft direction is obliquely penetrated, the outlet 42 is opened in the weft passage 12 . Here, in the second injection passage 40 , the passage from the inlet 41 to the outlet 42 is formed by a tapered surfa...

no. 3 approach

[0059] The third embodiment shown in FIG. 6 is a modification of the second injection passage in the first embodiment described above. Therefore, the same reference numerals are given to the same components as in the first embodiment described above, and description thereof will be omitted.

[0060] The second injection passage 50 in the third embodiment is arranged at the same position as that in the first embodiment, and its inlet 51 is opened to the first annular chamber 15 , and its outlet 52 is opened to the weft passage 12 . However, the longitudinal central axis 53 of the second injection passage 50 and the longitudinal central axis 33 of the weft passage 12 are shifted by a predetermined amount so that they do not intersect. In addition, in the four second injection passages 50 shown in FIG. 6 , the longitudinal center axes 53 of the respective longitudinal direction central axes 53 are shifted in the rotational direction with respect to the longitudinal direction cent...

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PUM

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Abstract

To suppress backflow of a compressed air stream in a weft insertion nozzle of a weft insertion apparatus utilizing the compressed air stream. The compressed air stream is passed from a first annular chamber (15) through a straightening passage (16) and a compressed air stream passage (28) and jetted from a first jetting passage (29) into a joining passage (25). The compressed air stream in the first annular chamber (15) is made to inflow even from inlets (31) of second jetting passages (30) and jetted in a state of low pressure loss from the second jetting passages (30) in the weft insertion direction into a weft yarn passage (12). A weft yarn (5) is transported through the interior of the weft yarn passage (12) by driving force of the compressed air stream jetted from the second jetting passages (30). The compressed air stream jetted from the second jetting passages (30) drives the compressed air stream jetted from the first jetting passage (29) in the weft insertion direction in the joining passage (25) and acts as force for suppressing the backflow. Thereby, the driving force in the weft insertion direction can be increased.

Description

technical field [0001] The present invention relates to a weft inserting device for inserting weft threads into warp thread openings in an air-jet loom using jets of compressed air streams. Background technique [0002] In the weft insertion device of the air-jet loom, various treatments are performed on the weft insertion nozzle to make the weft yarn fly at high speed and stably, such as adjusting the pressure or flow rate of the compressed air flow to an appropriate level, or lengthening the acceleration tube to move the acceleration tube The passage is machined into a cone shape. [0003] For example, Patent Document 1 discloses a weft insertion nozzle in which a compressed air flow and a weft yarn 2 meet at a confluence formed by the end portion 3a of the yarn introduction pipe 3 and the start end portion 8a of the mixing pipe 8. 3 is formed with a notch 11 (see FIGS. 1 to 5 ) or a plurality of holes 13 , 14 , 15 (see FIGS. 6 and 7 ). [0004] Conventional general weft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D47/30
Inventor 石川洋彦松尾力
Owner TOYOTA IND CORP
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