EP1169503A1 - Buse auxiliaire pour metier a tisser mecanique - Google Patents

Buse auxiliaire pour metier a tisser mecanique

Info

Publication number
EP1169503A1
EP1169503A1 EP00926927A EP00926927A EP1169503A1 EP 1169503 A1 EP1169503 A1 EP 1169503A1 EP 00926927 A EP00926927 A EP 00926927A EP 00926927 A EP00926927 A EP 00926927A EP 1169503 A1 EP1169503 A1 EP 1169503A1
Authority
EP
European Patent Office
Prior art keywords
auxiliary nozzle
bulge
upper edge
hollow needle
nozzle according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00926927A
Other languages
German (de)
English (en)
Other versions
EP1169503B1 (fr
Inventor
Jozef Peeters
Joseph Verhulst
Jean Marie Bamelis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Picanol NV
Original Assignee
Picanol NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Priority to EP04004657A priority Critical patent/EP1428918B1/fr
Publication of EP1169503A1 publication Critical patent/EP1169503A1/fr
Application granted granted Critical
Publication of EP1169503B1 publication Critical patent/EP1169503B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3006—Construction of the nozzles
    • D03D47/302—Auxiliary nozzles

Definitions

  • the invention relates to an auxiliary nozzle for a weaving machine which is designed as a hollow needle and which is provided in a wall adjoining a closed tip with one or more outflow openings which, when the auxiliary nozzle is attached to the weaving machine, are directed onto a weft insertion channel .
  • Auxiliary nozzles of this type are known from US Pat. No. 5,020,574. They support the insertion of a weft thread into the shed of a weaving machine.
  • auxiliary nozzles of this type are arranged distributed over the width of the sley, each of which deliver a fluid flow which supports the transport of a weft thread blown into a weft insertion channel of a reed.
  • the auxiliary nozzles are arranged in such a way that the blowing opening or blowing openings made in a wall below the tip are aligned in a certain position with respect to the upper wall and the rear wall of the weft insertion channel.
  • the fluid stream flowing out of the blow orifice is directed essentially in the longitudinal direction of the weft insertion channel and has a component obliquely upwards.
  • the auxiliary nozzles move through the lower warp thread level into the shed each time the weft thread is inserted. It has been found that warp threads, which consist of several thin individual filaments and are only slightly twisted, fray or fray at the points at which the auxiliary nozzles are moved into and out of the shed through the lower warp thread plane. This fraying or fraying occurs especially in filament threads in which thin plastic filaments run essentially parallel to one another and are welded to one another at regular intervals.
  • a fabric is woven which has a different appearance from the rest of the fabric at the points at which the auxiliary nozzles are moved through the lower warp thread plane.
  • these warp threads In the area of the auxiliary nozzles, these warp threads have a larger volume than the other warp threads, since the thin filaments are no longer arranged exactly next to one another.
  • the invention has for its object to design an auxiliary nozzle of the type mentioned so that the risk of damaging warp threads is reduced.
  • the hollow needle is provided in the area of the tip with a bulge which is directed towards the reed when the auxiliary nozzle is installed in the weaving machine.
  • the auxiliary nozzle according to the invention not only reduces the risk that the auxiliary nozzle gets between the individual threads of a warp thread, but it is also possible that the fluid flow from the or the outflow openings has a less or less adverse effect on the warp threads.
  • the walls of the bulge connect continuously to the walls of the hollow needle.
  • the bulge has a wall which is essentially flush with the wall containing the outflow opening or openings.
  • the interior of the hollow needle is widened into the region of the bulge.
  • the cross section of the interior perpendicular to it can then be reduced.
  • at least the wall provided with the outlet opening or openings has an increased wall thickness.
  • the wall thickness can be increased without the flow cross section to the outflow openings being reduced and the flow resistance being increased, since the widening of the interior in the region of the bulge increases the flow cross section.
  • the outflow opening or outflow openings are designed as nozzles.
  • the fluid jet or jets can be bundled and directed better, so that they can develop greater driving force on a weft thread.
  • the tip of the hollow needle has an essentially straight-line upper edge which extends into the area of the chung extends. It is advantageously provided that the upper edge extends at an angle between 70 ° and 110 ° to the longitudinal axis of the hollow needle.
  • FIG. 1 shows a schematic representation of part of an air jet weaving machine with several auxiliary nozzles
  • FIG. 3 shows a section similar to FIG. 2 during the movement of the sley, in which the auxiliary nozzles move through a lower warp thread plane
  • FIG. 4 is a side view of an auxiliary nozzle according to the invention on an enlarged scale
  • FIG. 8 shows a section similar to FIG. 2 of a modified embodiment
  • FIG. 9 shows a section corresponding to FIG. 3 of the embodiment according to FIG. 8,
  • FIG. 10 is a view of the auxiliary nozzle of FIGS. 8 and 9 on a larger scale
  • 11 shows a section similar to FIG. 6 through the auxiliary nozzle according to FIGS. 8 and 9 on a larger scale
  • FIG. 12 is a view of a modified embodiment of an auxiliary nozzle
  • FIGS. 13 and 14 shows a longitudinal section through the auxiliary nozzle of FIGS. 13 and
  • FIG. 15 shows yet another embodiment of an auxiliary nozzle.
  • the weaving machine shown in FIG. 1 has a weaving reed 3, which consists of a large number of lamellae, each of which has a cutout in order to form a U-shaped weft insertion channel 4.
  • weft threads 1, 2 are inserted into a shed 21, which is formed from warp threads in an upper and a lower warp thread plane 17, 18, as shown in FIGS. 2 and 3.
  • the weft threads 1 or 2 are each blown in by a main blowing nozzle 5, 6.
  • the further transport of the weft threads 1 or 2 is supported by air jets 7, which blow auxiliary nozzles 8 into the weft insertion channel 4.
  • the air jets 7 are directed essentially in the longitudinal direction of the weft insertion channel 4 and have a component which is directed slightly obliquely upwards and which is directed toward the top wall 15 and the rear wall of the weft insertion channel 4 at the weft threads 1, 2.
  • the reed 3, the main blowing nozzles 5, 6 and the holder 9 of the auxiliary nozzles 8 are fastened to a shutter profile 10 of a sley, as is known for example from US 50 20 574.
  • the shutter profile 10 is, for example, attached to a shaft of the sley, not shown, which is driven to move back and forth. As shown in FIGS.
  • a shed 21 is formed from an upper warp plane 17 and a lower warp plane 18, which converge in the stop line 19, on which the wefts are struck by the reed 3, so that a fabric 20 is formed becomes.
  • a weft thread is struck through the rear wall 16 of the U-shaped weft insertion channel 4, which belongs to the central part 24 of the reed.
  • the upper part 23 of the slats of the reed 3 forms an upper wall 15 of the guide channel 4.
  • the lower wall 14 of the guide channel 4 is formed by the lower part 22 of the slats of the reed 3.
  • the auxiliary nozzle 8 is designed as a hollow needle 11 which is provided with an outflow opening 25 in a side wall 26 near its tip 12.
  • the blowing opening 25 consists of a plurality of small openings.
  • the hollow needle 11 of the auxiliary nozzle 8 is provided in the region of the tip 12 with a lateral bulge 13 which faces the reed 3 when the auxiliary nozzle 8 is attached to the sley.
  • the bulge 13 has a side wall 27 which is essentially an extension of the side wall 26 of the hollow needle 11, in which the outflow opening 25 is provided.
  • the bulge 13 is arranged near the lower part 22 of the reed 3 in the region of the lower wall 14 of the weft insertion channel 4.
  • the distance D between the bulge 13 and the lower part 22 of the reed is less than 3 mm, for example.
  • the auxiliary nozzle 8 is provided with an upper edge 28 which extends into the region of the bulge 13.
  • the essentially straight upper edge 28 adjoins the hollow needle 11 and the bulge 13 via curves with a relatively large radius.
  • the highest point 30 of the tip 12 of the hollow needle 11 is located in the region of the bulge 13.
  • the upper edge 28 of the auxiliary nozzle 8 runs approximately tangent when it is mounted on the sley. tial to a circle 31 around the axis of the shaft of the sley. 2 to 6, the upper edge 28 extends at an angle of approximately 110 ° to the longitudinal axis 32 of the auxiliary nozzle 8.
  • the auxiliary nozzles 8 are moved by means of the movement of the sley for each weft thread entry between the warp threads of the warp thread plane 18 into the shed 21 and after the weft thread has been struck through the warp thread plane 18 again out of the shed 21.
  • the auxiliary nozzles 8 move from the position shown in broken lines in FIG. 3 to the position shown in FIG. 2 and back again. In doing so, they assume intermediate positions, as shown, for example, in FIG. 3.
  • the tips 12 of the auxiliary nozzles 8 move through the lower warp thread plane 18, the upper edges 28 of the auxiliary nozzles 8 have an angle H with respect to this lower warp thread plane 18.
  • the angle H is designed such that the highest point 30 located in the vicinity of the reed 3 the upper edge 28 of the bulge 13 first comes into contact with this lower warp thread plane 18. It should also be noted here that the warp thread levels 17 and 18 also move further apart into the position according to FIG. 2 when the auxiliary nozzles 8 penetrate into the lower warp thread level 18.
  • the warp threads guided through the lamellae 38 of the reed 3 are deflected by the auxiliary nozzle 8 when it passes between the warp threads of the lower warp thread plane 18. This will stretch these warp threads.
  • the warp threads 18 lie on the side walls 27, 33 of the bulge 13 and on the slats 38 of the reed 3.
  • the consequence of this is that the warp threads 18 located near the blowing opening 25 of the auxiliary nozzles 8 are tensioned. With warp threads that consist of several thin filaments lying next to one another, this tensioning causes the filaments to be pressed slightly against one another. This has the effect that the air jet 7 of the auxiliary nozzles 8 is less between the individual filaments can penetrate. This also limits the warping of the warp threads.
  • the auxiliary nozzle 8 is provided with a lateral bulge 13 directed towards the reed 3.
  • the upper edge 28 also forms This lower warp thread plane 18 has an angle H which is designed such that the part of the upper edge 28 facing the reed 3 comes last and the part of the upper edge 28 facing away from the reed 3 comes into contact first with the warp threads of the lower warp thread plane 18.
  • the upper edge 28 as shown in FIG.
  • a welding spot 35 can slide over the upper edge 28 of the auxiliary nozzle 8 as it enters the shed and moves into the position shown in dashed lines in FIG. 10. Due to the relatively large length of the upper edge 28 and the angle H, it is avoided that the auxiliary nozzle 8 can get between the individual filament threads of a warp thread of the lower warp thread plane 18. The upper edge 28 is so long that the auxiliary nozzle 8, which is moved along with the sley, cannot penetrate between two successive welding points 35 into a warp thread of the lower warp thread plane 18.
  • the angle of the upper edge 28 to the longitudinal axis 32 and / or the shape of the auxiliary nozzles 8 designed as a hollow needle 11 is expediently matched to the material of the processed warp threads in such a way that the warp threads are not damaged when they penetrate into the shed, ie are not frayed or frayed .
  • This angle is preferably on the order of 70 ° to 110 °.
  • the cross section of the cavity 36 of the hollow needle 11 of the auxiliary nozzle 8 is smaller in the region of the beginning of the bulge 13 (arrow direction 34 in FIG. 11) than in the preceding section 39.
  • the wall thickness of the auxiliary nozzle 8 is greater in the region of the outflow opening 25 than in that remaining area of the tip 12. Because of the greater wall thickness, it is possible to guide the emerging fluid jet better in the individual openings of the outflow opening, since the length of the openings is greater. This can also limit the risk that an air jet 7 (FIG. 1) will damage the warp threads.
  • the cavity 36 within the auxiliary nozzle 8 aerodynamically efficient, i.e. Favorable for an air jet 7 from the outflow opening 25.
  • the inner thickening 29 shown in FIG. 11 can be provided for this purpose, which improves a deflection of the fluid flow towards the outflow opening 25.
  • the individual openings of the outflow opening 25 are arranged closer to the upper edge 28 of the auxiliary nozzle 8 and are not distributed over an approximately circular surface, but rather over three rows arranged one above the other.
  • the individual openings also extend into the region of the bulge 13, so that the same number of individual openings (19 individual openings in the exemplary embodiment) can be accommodated closer to the upper edge 28, ie the same overall cross section for the outflow opening 25 is achieved. Since the outflow opening 25 used to pass completely through the lower warp thread plane 18 in this embodiment. can be started earlier. Since the outflow opening 25 is later moved out of the shed by the lower warp thread plane 18 during the opposite movement, the outflow from the auxiliary nozzle 8 can be extended.
  • a slit-shaped nozzle is provided as the outflow opening 25, which extends essentially parallel to the upper edge 28 of the auxiliary nozzle 8.
  • this outflow opening 25 has a relatively large length and, moreover, a nozzle shape 40, in particular the shape of a Lavalle nozzle.
  • a stiffened air jet 7 can be reached at supersonic speed at the outlet of the nozzle opening 25.
  • Such a strip-shaped, bundled air jet only slightly impacts the nearby warp threads of the lower warp thread plane 18, so that the risk of these warp threads being unraveled is reduced.
  • the bundled air jet 7 can also exert a high entrainment force on a weft thread 1 or 2.
  • the embodiment according to FIG. 15 is similar to the embodiment according to FIG. 12.
  • the outflow opening 25 consists only of a small number of individual openings, in the exemplary embodiment only three individual openings which have different flow cross sections.
  • the flow cross sections of the individual openings are smallest in the region of the bulge 13 and largest at the point furthest from the bulge.
  • the auxiliary nozzle 8 according to the invention can be used not only to blow out an air jet 7, but rather also with another fluid with which a weft thread is transported.
  • the fluid can be, for example, a liquid such as water, so that a liquid jet hits the Weft threads are directed.
  • a gas as a fluid or a gas in which a liquid is sprayed or atomized, for example an air jet with sprayed water.
  • auxiliary nozzle 8 according to FIG. 6 can have an interior corresponding to the auxiliary nozzle 8 according to FIG. 11.
  • the scope of protection is determined only by the claims.
EP00926927A 1999-04-14 2000-04-14 Buse auxiliaire pour metier a tisser mecanique Expired - Lifetime EP1169503B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04004657A EP1428918B1 (fr) 1999-04-14 2000-04-14 Tuyère auxiliaire pour un métier à tisser

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9900257A BE1012608A3 (nl) 1999-04-14 1999-04-14 Spuitmondstuk voor een weefmachine.
BE9900257 1999-04-14
PCT/EP2000/003369 WO2000063473A1 (fr) 1999-04-14 2000-04-14 Buse auxiliaire pour metier a tisser mecanique

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP04004657A Division EP1428918B1 (fr) 1999-04-14 2000-04-14 Tuyère auxiliaire pour un métier à tisser

Publications (2)

Publication Number Publication Date
EP1169503A1 true EP1169503A1 (fr) 2002-01-09
EP1169503B1 EP1169503B1 (fr) 2004-03-03

Family

ID=3891863

Family Applications (2)

Application Number Title Priority Date Filing Date
EP00926927A Expired - Lifetime EP1169503B1 (fr) 1999-04-14 2000-04-14 Buse auxiliaire pour metier a tisser mecanique
EP04004657A Expired - Lifetime EP1428918B1 (fr) 1999-04-14 2000-04-14 Tuyère auxiliaire pour un métier à tisser

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04004657A Expired - Lifetime EP1428918B1 (fr) 1999-04-14 2000-04-14 Tuyère auxiliaire pour un métier à tisser

Country Status (9)

Country Link
US (1) US6536482B1 (fr)
EP (2) EP1169503B1 (fr)
KR (1) KR100634900B1 (fr)
CN (1) CN1116459C (fr)
AT (2) ATE369451T1 (fr)
BE (1) BE1012608A3 (fr)
DE (2) DE50014554D1 (fr)
ES (1) ES2213014T3 (fr)
WO (1) WO2000063473A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102839485A (zh) * 2012-09-13 2012-12-26 吴江市隆泰喷织厂 一种辅助喷嘴的套筒

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50300789D1 (de) * 2002-04-26 2005-08-25 Sultex Ag Rueti Fang- und Haltevorrichtung für das fangseitige Schussfadenende in einer Webmaschine
JP2004107819A (ja) * 2002-09-18 2004-04-08 Tsudakoma Corp 空気噴射式織機の緯糸飛走制御装置
BE1015155A3 (nl) * 2002-10-23 2004-10-05 Picanol Nv Spuitmondstuk voor het ondersteunen van een inslagdraad in een weefmachine.
BE1015261A3 (nl) * 2002-12-19 2004-12-07 Picanol Nv Spuitmondstuk voor het ondersteunen van een inslagdraad bij een weefmachine.
DE502004003591D1 (de) * 2003-09-02 2007-06-06 Sultex Ag Webmaschine mit einer Einlegevorrichtung für schussfäden
BE1022812B1 (nl) * 2015-03-11 2016-09-13 Picanol Nv Hulpblaasmondstuk voor een weefmachine
KR102118261B1 (ko) * 2018-09-27 2020-06-02 서용교 에어제트직기에서의 다중위사 위입불량 방지장치
JP7077968B2 (ja) * 2019-01-14 2022-05-31 株式会社豊田自動織機 エアジェット織機の緯糸処理装置
CN114214778B (zh) * 2021-12-15 2023-01-31 五洋纺机有限公司 一种间隔布织造中抽除辅助纬纱的方法
IT202200002681A1 (it) * 2022-02-14 2023-08-14 Itema Spa Ugello ausiliario perfezionato per telai ad aria

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CH650035A5 (en) * 1980-11-28 1985-06-28 Sulzer Ag Auxiliary blowing nozzle for an air-jet weaving machine
EP0145824B1 (fr) * 1983-12-09 1987-03-04 GebràœDer Sulzer Aktiengesellschaft Buse de soufflage auxiliaire pour métier à tisser à jet d'air
DE3444973C1 (de) * 1984-12-10 1986-04-03 Scheffel Walter Dipl Ing Weblade mit Webblatt fuer Duesenwebmaschinen
DE3643058A1 (de) * 1986-11-21 1988-06-30 Picanol Nv Duesen-webmaschine
JP2711099B2 (ja) * 1987-09-25 1998-02-10 日産テクシス株式会社 空気噴射式織機の補助ノズル
JPH0299643A (ja) * 1988-09-29 1990-04-11 Toyota Autom Loom Works Ltd ジェットルームにおける緯入れ装置
NL1001277C1 (nl) * 1995-09-25 1997-03-26 Te Strake Bv Hulpblazer voor een weefmachine.
DE29720595U1 (de) * 1997-11-20 1998-02-05 Dornier Gmbh Lindauer Hilfsblasdüse, insbesondere für eine Luftdüsenwebmaschine
DE19751354C1 (de) * 1997-11-20 1999-06-17 Dornier Gmbh Lindauer Hilfsblasdüse für eine Luftdüsenwebmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0063473A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102839485A (zh) * 2012-09-13 2012-12-26 吴江市隆泰喷织厂 一种辅助喷嘴的套筒

Also Published As

Publication number Publication date
ES2213014T3 (es) 2004-08-16
CN1355862A (zh) 2002-06-26
EP1169503B1 (fr) 2004-03-03
DE50014554D1 (de) 2007-09-20
US6536482B1 (en) 2003-03-25
DE50005517D1 (de) 2004-04-08
CN1116459C (zh) 2003-07-30
KR100634900B1 (ko) 2006-10-17
ATE369451T1 (de) 2007-08-15
EP1428918B1 (fr) 2007-08-08
KR20010113775A (ko) 2001-12-28
BE1012608A3 (nl) 2001-01-09
ATE261011T1 (de) 2004-03-15
WO2000063473A1 (fr) 2000-10-26
EP1428918A3 (fr) 2004-09-01
EP1428918A2 (fr) 2004-06-16

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