EP0112431B1 - Verfahren für den Betrieb einer Luftstrahl-Webmaschine - Google Patents

Verfahren für den Betrieb einer Luftstrahl-Webmaschine Download PDF

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Publication number
EP0112431B1
EP0112431B1 EP82810564A EP82810564A EP0112431B1 EP 0112431 B1 EP0112431 B1 EP 0112431B1 EP 82810564 A EP82810564 A EP 82810564A EP 82810564 A EP82810564 A EP 82810564A EP 0112431 B1 EP0112431 B1 EP 0112431B1
Authority
EP
European Patent Office
Prior art keywords
pressure wave
auxiliary nozzles
nozzles
time
switched
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.)
Expired
Application number
EP82810564A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0112431A1 (de
Inventor
Hansueli Ing. Lerch
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Priority to EP82810564A priority Critical patent/EP0112431B1/de
Priority to DE8282810564T priority patent/DE3276123D1/de
Priority to US06/554,077 priority patent/US4532964A/en
Priority to BR8306717A priority patent/BR8306717A/pt
Priority to CS839803A priority patent/CS246070B2/cs
Priority to JP58242275A priority patent/JPS59130346A/ja
Publication of EP0112431A1 publication Critical patent/EP0112431A1/de
Application granted granted Critical
Publication of EP0112431B1 publication Critical patent/EP0112431B1/de
Expired legal-status Critical Current

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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
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles

Definitions

  • the invention relates to a method for operating an air jet weaving machine with auxiliary nozzles distributed over the weaving width to form a first pressure wave traveling with the weft thread tip during the entry through the shed, the auxiliary nozzles being at least partially switched off again before the end of the entry.
  • all auxiliary nozzles are switched off again before the end of the entry, with the exception of those which are close to the start side of the weaving machine. The latter can only be activated for the first time towards the end of the entry.
  • the function of the auxiliary nozzles in the acceleration of the weft thread to be inserted is exhausted at its tip or in the area of its tip. If the thread tip has passed a certain auxiliary nozzle, it remains ineffective until it is finished again after it has been designed again. With this mode of operation of the auxiliary nozzles it can happen that a weft thread lying in serpentine lines in the shed is not stretched sufficiently before the stop.
  • a pressure wave also runs through the shed due to the successive switching on of the auxiliary nozzles.
  • the auxiliary nozzles are controlled in such a way that when the auxiliary nozzles are switched on only once, all of them are acted on at least at a certain point in time.
  • the auxiliary nozzles can all be briefly supplied with the pressure medium at the same time before being switched on successively. This mode of operation was chosen in order to enable a reliable weft insertion even when the weaving machine was running slowly.
  • the procedure has the same disadvantage as that according to the German interpretation described at the beginning.
  • the invention has for its object to provide an entry method in which the weft thread is stretched in the shed at the end of the entry, the total duty cycle of all auxiliary nozzles remains short and thus no high air consumption occurs.
  • the invention consists in that the first pressure wave is followed by at least one further pressure wave which is generated by renewed successive switching on of at least some of the auxiliary nozzles which have already been switched off.
  • a third pressure wave can also follow the second pressure wave traveling through the shed.
  • the time intervals between the switching off of the auxiliary nozzles after the first pressure wave and the switching on of the same auxiliary nozzles before the second pressure wave can gradually decrease in the direction of the front side of the weaving machine.
  • the blowing time of the auxiliary nozzles during the second pressure wave can be shorter than during the first pressure wave.
  • the blowing time of the auxiliary nozzles during the second or third pressure wave can gradually decrease in the direction of the front side of the weaving machine.
  • the repeated successive switching on of auxiliary nozzles allows a safe weft insertion with good stretching of the thread and with reduced air consumption in comparison to the method according to German patent 2328135.
  • the pressure in the second or third pressure wave can be lower than that in the first pressure wave. Furthermore, when using the described method, the pressure and thus also the energy consumption in the first pressure wave can generally be lower than in the absence of a second pressure wave.
  • the weaving machine designated as a whole by 31, contains two machine cheeks 32, 33.
  • a goods tree 34 and a reed 35 are arranged between them.
  • the weft 36 is drawn off from a fixed spool 37, passed through a weft brake 38 and blown in from a main entry nozzle 39 located outside the shed (weaving width W).
  • Distributed over the weaving width W are auxiliary nozzles 1-24 which protrude into the shed during the weft insertion.
  • a suction nozzle 42 is arranged on the catch side 41.
  • the nozzles 39, 1-24 are e.g. Valves 44 controlled by an electronic control device 43 are connected to an air distribution pipe 45, which is fed via an air supply line 46 from a compressed air container (air source) 47.
  • the container 47 is held under pressure by an air compressor, not shown.
  • the associated operating method of the weaving machine 31 shown in FIG. 2 proceeds as follows. On the abscissa of Fig. 2, the angular degrees of the main shaft of about 100-ca. 280 °, the blowing duration Z is shown on the ordinate wear. Instead of the degrees of angle, the length specifications corresponding to the weaving width could also be plotted on the abscissa.
  • the entry of the weft thread 36 begins with the opening of the valves 44 belonging to the nozzles 39, 1-4 (first auxiliary nozzle group A) and the simultaneous opening of the weft thread brake (38) at the time O. At the time a, at which the thread tip 48 is approximately of the auxiliary nozzle 4, the auxiliary nozzles 5-8 forming the second auxiliary nozzle group B are switched on.
  • group A Shortly afterwards, group A is switched off at time b.
  • Group B now takes over the thread tip 48, while nozzle 39 continues to blow.
  • the instantaneous position of the weft thread 36 shown in FIG. 1 results, in which the thread tip 48 is between the auxiliary nozzles 8 and 9.
  • group B is switched off.
  • the thread is carried on by group C until time e.
  • Group e (auxiliary nozzles 13-16) is switched on at e, group C is switched off at time f.
  • group D Shortly after time f - while group D continues to transport the thread tip 48 - at time g group A is switched on again to support the rear weft piece. Subsequently, at time h, group E, comprising auxiliary nozzles 17-20, is switched on and shortly thereafter, at time i, group A of the auxiliary nozzles now functioning as support nozzles is switched off again. At the same time, group B is now switched on for its second time as a support nozzle. At time k, group D is switched off. At this time, the thread 36 at its tip 48 is transported further by the auxiliary nozzles 17-20 (group E) operating as pulling nozzles and by the group B switched on for the second time in the rear weft piece.
  • group E comprising auxiliary nozzles 17-20
  • group B is switched off for the second time and group C is switched on for the second time, so that the auxiliary nozzles 9-12 now continue to carry the rear weft piece in function as support nozzles.
  • group F comprising nozzles 21-24 is switched on.
  • group E is switched on for the second time.
  • group D is switched off for the second time
  • group E is switched on for the second time.
  • Groups F and E are finally switched off at time r.
  • the thread tip 48 is in the area of the suction nozzle 42 which has meanwhile been switched on, and the weft insertion has ended.
  • the nozzle groups A-F form a first pressure wave (thread tip traveling field) G running with the thread tip 48 through the compartment, whereby they work as traction nozzles.
  • Groups A-E are then switched off in order to be switched on successively a second time after a certain break.
  • the groups A-E form a hiking field H following the thread tip traveling field G, in which they work as support nozzles. While the blowing time in the thread tip traveling field G lasts from time O to b or a-d etc. and is of the same length in all groups A-F, the blowing time in the wake traveling field H for group A is g-i.
  • the blowing duration g-i is shorter than the main blowing duration O-b in the field G.
  • the blowing duration of the individual groups in the lagging field H gradually decreases.
  • the blowing time 1-p of group C is shorter than the blowing time i-1 of group B.
  • the blowing time q-r is again shorter than the previous blowing time p-q.
  • the thread tip traveling field G runs in the same way as in FIG. 2, however the trailing traveling field J sets in later than the field H according to FIG. 2.
  • the nozzle groups AE blow in the trailing traveling field until the end of entry at r .
  • the blowing duration s-r of group A in the trailing field J is longer than the duration O-b of the same group A in the leading field G.
  • the blowing duration in the trailing field J also decreases successively with a moving thread tip 48.
  • a first trail hiking field K and a subsequent, second trail hiking field L are used for groups A-E.
  • the field K progressively corresponds to field H according to FIG. 2, but ends at u and thus before the end of the entry at r.
  • the trailing field L largely corresponds to the field J according to FIG. 3.
  • Field L only starts at a somewhat later point in time v, but here, as with J, all groups A-E blow until the end of the entry r.
  • the two wake fields M, N largely correspond to the wake fields K, L according to FIG. 4. Only the blowing duration of the groups A-E is kept longer in the field M than for K according to FIG. 4. For the rest, group E in field M blows to the end of entry r, so that the end of group D, which is switched on for the second time, in field N forms the end of second trailing field N.
  • a first wake-up traveling field S by means of the nozzles 5, 9, 13, 17 corresponds to the field R according to FIG. 8 and also a second wake-up wander corresponding to the field Q according to FIG field T used. Only the blowing time in fields S, T is shorter than in fields R, Q.
  • the pressure maintained in the containers 45, 47 can be kept lower when using trailing moving fields according to FIGS. 2-9 than when using only a single thread tip moving field G according to FIG. 10.
  • the individual ones used to form a trailing moving field Auxiliary nozzle groups can, for example also include two or three auxiliary nozzles.
  • a passed auxiliary nozzle is generally not switched off itself immediately after the thread tip 48 flies by, but only after a certain initial region of the weft thread has moved past the nozzle.
  • the term "thread tip”, which is used several times in the foregoing, is to be understood to mean a certain initial region of the weft thread that follows the actual tip.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP82810564A 1982-12-24 1982-12-24 Verfahren für den Betrieb einer Luftstrahl-Webmaschine Expired EP0112431B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP82810564A EP0112431B1 (de) 1982-12-24 1982-12-24 Verfahren für den Betrieb einer Luftstrahl-Webmaschine
DE8282810564T DE3276123D1 (en) 1982-12-24 1982-12-24 Device for operating an air jet loom
US06/554,077 US4532964A (en) 1982-12-24 1983-11-21 Method of operating an air nozzle weaving machine
BR8306717A BR8306717A (pt) 1982-12-24 1983-12-07 Processo para a operacao de um tear a jato de ar
CS839803A CS246070B2 (en) 1982-12-24 1983-12-22 Method of weft thread insertion into fabric by means of air jet
JP58242275A JPS59130346A (ja) 1982-12-24 1983-12-23 空気ノズル織機の運転方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82810564A EP0112431B1 (de) 1982-12-24 1982-12-24 Verfahren für den Betrieb einer Luftstrahl-Webmaschine

Publications (2)

Publication Number Publication Date
EP0112431A1 EP0112431A1 (de) 1984-07-04
EP0112431B1 true EP0112431B1 (de) 1987-04-22

Family

ID=8190095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810564A Expired EP0112431B1 (de) 1982-12-24 1982-12-24 Verfahren für den Betrieb einer Luftstrahl-Webmaschine

Country Status (6)

Country Link
US (1) US4532964A (enrdf_load_stackoverflow)
EP (1) EP0112431B1 (enrdf_load_stackoverflow)
JP (1) JPS59130346A (enrdf_load_stackoverflow)
BR (1) BR8306717A (enrdf_load_stackoverflow)
CS (1) CS246070B2 (enrdf_load_stackoverflow)
DE (1) DE3276123D1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE903156A (nl) * 1985-08-30 1986-02-28 Picanol Nv Klepinrichting voor de bediening van op een lade bevestigde blazers bij weefmachines
NL8600713A (nl) * 1986-03-20 1987-10-16 Picanol Nv Werkwijze voor de sturing van bijblazers bij het inbrengen van een inslagdraad, bij weefmachines; en inrichting hiertoe aangewend.
DE4131474C2 (de) * 1991-09-21 1995-01-05 Dornier Gmbh Lindauer Verfahren zum Schußfadeneintrag auf einer Luftdüsenwebmaschine
DE4216749C1 (de) * 1992-05-21 1994-01-05 Dornier Gmbh Lindauer Verfahren zum pneumatischen Schußfadeneintrag auf Luftdüsenwebmaschinen
CN104790101B (zh) * 2015-04-28 2016-08-24 宁波市东盛纺织有限公司 一种宽幅喷气织机
CN104790099B (zh) * 2015-04-28 2016-05-11 宁波市东盛纺织有限公司 一种具有导气杆的喷气织机
CN104790100B (zh) * 2015-04-28 2016-05-11 宁波市东盛纺织有限公司 一种喷气织机
JP6558348B2 (ja) * 2016-11-18 2019-08-14 株式会社豊田自動織機 エアジェット織機における緯糸飛走状態検知装置
EP4549641A1 (en) * 2023-11-01 2025-05-07 Kabushiki Kaisha Toyota Jidoshokki Air-jet loom

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757861A (nl) * 1969-10-22 1971-04-01 Strake Maschf Nv Werkwijze voor het transporteren van een inslagdraad door een weefvak, alsmede weefmachine te gebruiken bij deze werkwijze
DE2328135C3 (de) * 1973-06-02 1980-12-04 Walter 8832 Weissenburg Scheffel Verfahren zum Schußeintrag bei Düsenwebmaschinen
CS179657B1 (en) * 1975-06-10 1977-11-30 Juraj Spisiak Wiring of apparatus for controlling active elements of weft inserting duct in jet weaving machines
JPS54106664A (en) * 1978-02-10 1979-08-21 Toyoda Automatic Loom Works Air jetting method of subbnozzle in jet loom
JPS596934B2 (ja) * 1978-02-10 1984-02-15 株式会社豊田自動織機製作所 ジエツトル−ムにおける補助ノズル給気方法及びその装置
DE2836206B2 (de) * 1978-08-09 1981-03-26 Gebrueder Sulzer Ag, 8401 Winterthur Elektronische Steuereinrichtung für eine Webmaschine
JPS5691038A (en) * 1979-12-26 1981-07-23 Nissan Motor Wefting method of air jet type loom
CH648617A5 (de) * 1980-12-17 1985-03-29 Sulzer Ag Verfahren zum betrieb einer webmaschine.
JPS5876551A (ja) * 1981-10-29 1983-05-09 津田駒工業株式会社 空気噴射式無杼織機の補助ノズル噴射方法

Also Published As

Publication number Publication date
DE3276123D1 (en) 1987-05-27
JPH0321654B2 (enrdf_load_stackoverflow) 1991-03-25
CS246070B2 (en) 1986-10-16
EP0112431A1 (de) 1984-07-04
US4532964A (en) 1985-08-06
BR8306717A (pt) 1984-07-31
JPS59130346A (ja) 1984-07-26

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