CN102449216A

CN102449216A - Method for inserting a weft thread and airjet weaving machine

Info

Publication number: CN102449216A
Application number: CN2010800233567A
Authority: CN
Inventors: B.斯梅特; P.普伊桑特
Original assignee: Picanol NV
Current assignee: Bijiale Suzhou Industrial Park Textile Machinery Co Ltd
Priority date: 2009-05-27
Filing date: 2010-05-26
Publication date: 2012-05-09
Anticipated expiration: 2030-05-26
Also published as: EP2435609B1; EP2435609A1; BE1018762A3; CN102449216B; WO2010136194A8; WO2010136194A1

Abstract

A method for inserting a weft thread (4, 5) into a shed of an airjet weaving machine which comprises a main nozzle device (70) and at least one set of relay nozzles (11 to 19), wherein a standard setting for a supply of compressed air to the main nozzle device (70) and/or to the at least one set of relay nozzles (11 to 19) is determined and is adjusted until a weft insertion becomes unstable. An airjet weaving machine which applies an above mentioned method is also disclosed.

Description

Insert the method and the air-jet loom of weft yarn

Technical field

The present invention relates to a kind ofly weft yarn inserted the method for the shed open of air-jet loom, the wherein compressed air of the autonomous spray nozzle device of weft yarn origin and at least one cover relay nozzle transportation.Preferably, the compressed air that provides to main burner device and at least one cover relay nozzle is by the cutout valve control of control module control.The invention still further relates to a kind of air-jet loom of this method of application, in other words, a kind of air-jet loom that can adopt said method.

Background technology

Can know by WO2007/057217A1, when weft yarn passes shed open and betransported, to continuous cover relay nozzle compressed air is provided continuously.To the different relay nozzle of many covers compressed air is provided through cutout valve.Each cutout valve is connected with a cover relay nozzle, and each cutout valve is all controlled by control module.When weft yarn passes shed open and betransported, on weft yarn, measure.For every cover relay nozzle, when the compressed-air actuated supply to this cover relay nozzle was interrupted, this time point can be determined.This time point can be confirmed according to said measurement.This allows fully to support slow weft thread and quick weft yarn from the compressed air of continuous cover relay nozzle.Of WO2007/057217A1, the influence that the compressed air of a cover relay nozzle is supplied with may be selected to be strong, medium or limited.

In the disclosed air-jet loom of WO2007/057217A1, the weft yarn that comes from different weft yarn buffers is inserted into shed open according to certain pattern.For every weft yarn that comes from certain weft yarn buffer, the main burner device of the main burner that contains arranged in series accordingly is provided.Further, provide many cover relay nozzle to be used to pass the weft yarn that the shed open transportation comes from different weft yarn buffers, more specifically, be used to pass shed open along the guiding channel transported weft thread.Through being arranged in the relevant cutout valve between compressed air accumulator and the corresponding main burner, compressed air is provided so that weft yarn is injected shed open to each main burner of main burner device.Through being arranged in the relevant cutout valve between a compressed air accumulator and the relevant cover relay nozzle, compressed air is provided to every cover relay nozzle.Every cover relay nozzle comprises at least one relay nozzle and such as two or three relay nozzle that are mounted adjacent.

In fabrication processes, in a period, can regulate through choke valve Electric Machine Control, that be installed between memory and a corresponding main burner and/or the cover relay nozzle to a main burner and/or the compressed-air actuated amount that provides of cover relay nozzle.Such as, the choke valve of this Electric Machine Control comprises can be through the controlled stepper motor of control module with the two-way control of a plurality of ranks.In fabrication processes, can regulate the control of a period compressed air quantity delivered according to the deviation of the insertion parameter that records.Such as, can control amount that a period compressed air supplies with so that the weft yarn that inserts roughly arrives the end of shed open in the position, angle of the expectation of loom.According to a kind of possibility, average deviation arrives between the time point that the terminal time point of shed open and loom main drive shaft arrive position, given angle at weft yarn and is determined.Choke valve can certain mode be controlled, and this mode makes the average deviation that in the several times insertion process of the weft yarn that comes from corresponding weft yarn buffer, is determined will be substantially equal to set-point.

Summary of the invention

The object of the present invention is to provide a kind of method and air-jet loom, this method and air-jet loom are intended to reduce the compressed-air actuated amount that is used for weft yarn is inserted shed open, simultaneously when minimizing is used for that weft yarn inserted the compressed-air actuated amount of shed open, avoid producing the weaving error.

Following method can achieve this end: this method is used for weft yarn is inserted the shed open of air-jet loom; This air-jet loom comprises main burner device and at least one cover relay nozzle; Wherein the standard setting of the compressed air of main burner device and/or at least one cover relay nozzle supply is confirmed; And the standard setting that the compressed air of wherein said main burner device and/or at least one cover relay nozzle is supplied with is conditioned to reduce compressed-air actuated supply; And wherein after adjustment criteria is set, observed the stability that weft yarn inserts.Preferably, the compressed air of main burner device and/or at least one cover relay nozzle is supplied with and to be reduced, and becomes unstable until the insertion of weft yarn.

Standard setting may be defined as weaving pattern, yarn type and according to before the function of other parameters of drawing of established data, said parameter for example is to the measured value of institute's transported weft thread in transportation.Through observing the stability that weft yarn inserts, can optimisation criteria set, prevent to produce the weaving error simultaneously.If it is stable that observed weft yarn inserts, then standard setting can be reduced such as compressed-air actuated supply by further adjusting further.If yet observed weft yarn inserts and becomes unstable, standard setting can be reset, so that it is stable to guarantee that in the periodic process of weaving weft yarn inserts next time, such as the standard setting before being reset to.

According to an embodiment, according to the interruption of the compressed air supply of the measurement of institute's transported weft thread being regulated main burner device and/or at least one cover relay nozzle, so that adjustment criteria is set.The time point that the compressed air of interruption and/or beginning main burner device and/or a cover relay nozzle is supplied with can be by alternately adjusting.According to another embodiment, at first only regulate the settings of overlapping the air supply of relay nozzle more, and if reach the limiting value that reduces the supply of many cover relay nozzle air, the time point that then interrupts the compressed air supply of main burner device also is set more early.Preferably; The air of main burner device is supplied with only to be reduced to and when beginning to insert, is allowed weft yarn to still have sufficient force to accelerate to the quantity when reaching desired speed; This desired speed confirmed by power, that is, and and the throughput of main burner device applied pressure and/or time per unit.Therefore, can realize the power support shute of relay nozzle, and avoid that the main burner device causes the unnecessary acceleration of weft yarn in the shed open porch with minimum.

According to another embodiment, when the weft yarn insertion becomes instability, regulate the compressed air of main burner device and supply with, specifically be to reduce to supply with.If the compressed air of main burner device is supplied with and is reduced, the weft yarn of insertion is less advanced shed open.Correspondingly, the filling speed of shed open porch also decreases, so that the front end of weft yarn can be not slower than the rear end of inserting weft yarn.This allows to realize the following setting of compressed air supply; The time point that is set in more early that wherein relay nozzle compressed air is supplied with is interrupted; And do not cause because speed is different, particularly because the speed of shed open porch greater than the terminal speed of shed open, is inserted the risk that weft yarn can form pitch of the laps.Therefore, after the compressed air that reduces the main burner device is supplied with, can supply with through the compressed air that is reduced by at least a cover relay nozzle and regulate said setting further.

According to another embodiment, the main burner device comprises first main burner and second main burner, wherein when the weft yarn insertion becomes instability, regulate the compressed air of first main burner and supply with, and specifically be to reduce to supply with.If first main burner is fixedly installed on the loom frame, first main burner also is called as attached main burner or fixing main burner.Preferably, observe from the moving direction of weft yarn, first main burner is arranged as and makes it before near second main burner that is installed on the shed open, specifically is mounted near the reed on the slay.If second main burner is installed on the slay, second main burner also is called as removable main burner.By this way, be arranged near second main burner of reed and can weft yarn be deeper inserted shed open, in other words, this can blow weft yarn and insert shed open as far as possible longways.Preferably, do not change or only limited through regulating the setting that setting changing compressed air removable or second main burner is supplied with.For fear of pitch of the laps, preferably, high to the compressed-air actuated pressure that fixedly main burner supplied to the compressed-air actuated pressure ratio that removable main burner supplied in the shed open porch.In one embodiment, first specifically is that fixedly main burner only can be set in and auxiliaryly from weft accumulator, to pull out weft yarn, and second specifically be that removable main burner is blown into shed open with weft yarn.

According to another embodiment, when the weft yarn insertion becomes instability, regulate the standard setting of the compressed air supply of at least one cover relay nozzle, particularly, postpone the interruption of the compressed air supply of at least one cover relay nozzle.Preferably; Of WO2007/057217 (content of this invention is incorporated in this specification whereby), according in the weft yarn transportation to this betransported weft yarn measurement, further postpone or shift to an earlier date the interruption that the compressed air of at least one cover relay nozzle is supplied with respect to standard setting.If it is stable that weft yarn inserts, standard setting can be conditioned, and particularly, the period that the compressed air of respective nozzle is supplied with can be shortened, and in other words, compares with the weaving cycle, and the interruption that the compressed air under the standard setting is supplied with can be by in advance.This adjusting can be repeated until that weft yarn inserts the instability that becomes.When weft yarn inserts when becoming instability, standard setting can be regulated through prolonging the period that air supplies with, and particularly, through postponing the interruption that complete relay nozzle air is supplied with, and/or the air of regulating the main burner device is supplied with and regulated.Therefore, the limit value of minimizing relay nozzle air supply is determined.According to preferred embodiment, user or operator can select the standard setting of at least one cover relay nozzle can receive the influence of which kind of degree.Such as, user or operator can select between slight effect, moderate influence or severe influence.

Preferably, continuous many covers relay nozzle is provided, wherein, the standard setting that the compressed air that adopts abdomen shape pattern or abdomen shape curve adjustment to overlap relay nozzle is supplied with more.According to the present invention; Abdomen type, abdomen shape pattern or abdomen shape curve are defined as a kind of pattern; According to this pattern, in the relay nozzle that a row overlaps continuously, it is bigger than the influence that the complete relay nozzle that is installed in the shed open side receives to be installed near the complete relay nozzle in shed open center.Such as, if nine cover relay nozzle are provided, then the the 4th, the 5 and the 6th cover is the most influenced, and the the the 1st, the 2, the 8th and the 9th cover does not receive or is influenced hardly, and the 3rd and the 7th cover receives minimal effect.Again such as, select a kind of abdomen shape pattern, make its with respect to the center that the cover relay nozzle be symmetrical.Such as, the complete relay nozzle place in the centre position, the setting that put break period during the first step is adjusted to and makes it with respect to the complete relay nozzle in centre before-promptly standard point break period of the 5th cover relay nozzle when nine cover nozzles are provided takes place 5% morning.For the 1st, the 2, the 8th and the 9th cover relay nozzle, some break period of air supply can at first remain unchanged, and can be selected for the 3rd and the 7th cover relay nozzle and early take place 1%, early takes place 3% and put the break period of the 4th and the 6th cover to be selected.If weft yarn inserts and still keeps stable after regulating, break period, point can further be conditioned, and inserted until weft yarn to become unstable or until reaching the limiting value that break period, point was regulated.Can set limiting value according to selected influence.Such as, when being chosen to be the slight effect setting, the limiting value of belly point can be set in 30% the most deeply, promptly is used for the complete relay nozzle in centre position.When being chosen to be average or severe influence when setting, the limiting value of dark belly point can be set in 40% or 50% respectively.In addition, can be according to the measurement of definite insertion weft yarn being regulated every setting of inserting weft yarn.Such as, when detecting slow weft thread, adopt than actual interrupt time point more late when detecting quick weft yarn.Such as, according to accomplish to twine weft yarn (such as second latitude around yarn) time point or time difference between the selected time point constantly and before in the weaving cycle of unwinding, can distinguish at a slow speed and weft yarn fast.When detecting slow weft thread, the time point between the standard time point of the initial setting of the adjusted standard time point of the optional standard setting that is positioned according to the present invention to regulate and the primary standard time point that the operator sets-in other words is as interrupting the time point that air is supplied with.

According to another embodiment, when detecting unstable weft yarn and insert, standard setting is by the standard setting before being reset to, particularly, reset to before standard setting before standard setting.Such as; 5% the abdomen shape pattern that adopt to reduce at first that the complete relay nozzle air in centre position supplies with; And in each continuous adjusting, the time point of the air supply of the complete relay nozzle in air supply period minimizing 5% or interruption centre position is set to morning 5%.If detecting unsettled weft yarn inserts; Adopt the abdomen shape pattern of two kinds of adjustings to be adopted once again before; Promptly; If accepted standard is set the air supply period minimizing 25% with the complete relay nozzle of center, and still detects wild effect, the setting of then having adopted can be shortened 15% standard setting by the air of the complete relay nozzle in the middle of the being reset to supply period.Clearly, before instability takes place or at that time, the standard setting of scalable main burner device still, after this, the air that relay nozzle can take place is supplied with more substantial minimizing, in other words, abdomen type or abdomen shape pattern greatly.

Therefore stable weft yarn inserts and is confirmed as following insertion: instability can not take place wherein, more specifically, the error of wherein can not weaving.According to an embodiment, unsettled weft yarn is inserted through at least one weaving error of detection and is able to confirm.Such as, according to the present invention, the weaving error, it is irregular also to be called as weaving, and it is defined as following situation: wherein the front end of weft yarn does not obtain enough supports and passes shed open to allow weft yarn under extended configuration, to betransported.

Such as, measured time point the and when time difference between the measured time point surpasses predetermined threshold when inserting weft yarn and arriving second measurement point when inserting weft yarn and arrive first measurement point detects the weaving error.When inserting weft yarn and arrive first measurement point measured time point and when inserting weft yarn and arriving second measurement point between the measured time point average time, difference surpassed predetermined threshold the time, also can detect the weaving error.

Such as, when at least one weft yarn of the Expected Arrival Time point of the insertion weft yarn of measurement point and this measurement point record time difference between the some time of advent when surpassing predetermined threshold, detect the weaving error.A plurality of measurement points can be defined as, and wherein can in shed open and/or in the shed open end, select each measurement point.According to an embodiment, such as, measure the unwinding time point and the time point that arrive such as shed open exit measurement point of weft yarn at for example weft accumulator place, and definite time difference.According to an example, confirm the time difference of penult between five on yarn-promptly during around yarn the 4th signal when the signal of yarn and weft yarn arrive the detector that is installed in the shed open exit.In addition or substituting ground, confirm that last is around i.e. the 5th time difference between when yarn and weft yarn arrive aforesaid detector of yarn-in this example.Under the constant situation of filling speed, arbitrary this two time differences are substantially constant also.When reducing filling speed towards shed open is terminal, one or each aforementioned time difference will increase, and therefore can sum up, and weft yarn is sufficiently supported.

According to a preferred embodiment; The average arrival time point of some insertions is determined; And if inserted expected time point and the time difference between the average arrival time point of this measurement point that weft yarn arrives measurement point during above predetermined threshold, would detect the weaving error.Preferably, of WO2006/114187, be used for confirming that a plurality of weft yarns of average arrival time point insert the deviation that is adjusted between the value of measuring during different the insertion.

According to another embodiment, when reaching the limiting value of at least one setting, confirm that unsettled weft yarn inserts.In confirm the process that unsettled weft yarn inserts according to the limiting value that reaches the standard setting of complete relay nozzle; Can reduce the compressed air of main burner device supplies with; Particularly, can in the weaving cycle, interrupt the time point of the air supply of main burner device in advance.After the air that reduces the main burner device was supplied with, the compressed-air actuated supply of complete relay nozzle can particularly, can be interrupted the time point of the air supply of complete relay nozzle in advance by further minimizing in the weaving cycle.The further minimizing that this allows the air of complete relay nozzle to supply with is inserted the instability that becomes once more until weft yarn.

Preferably, when the average speed that inserts weft yarn changes, particularly, when its speed is slowed down, regulate the setting of the compressed air supply of main burner device and/or at least one cover relay nozzle.In order to offset the change that weft yarn inserts average speed, can change the power of blowing of main burner device, i.e. the throughput of pressure and/or time per unit.For example described the method for offsetting the change of average speed among the WO2007/071350, the content of the document is incorporated into this.When particularly single thread was weaved with the particular yarn type, when casting off a spool, filling speed rose.This rising can be offset by weakening of the power of blowing.In other cases, the average speed of weft yarn weakens.According to the described method of WO2007/071350, arrive the velocity level's of measurement point substantially constant in order to keep average insertion speed or weft yarn, correspondingly increase or weaken the throughput of pressure and/or time per unit.For fear of the conflict between two kinds of regulative modes, wherein a kind of under given conditions method can be interrupted or stop.Such as, if reach the limiting value of the throughput of the pressure that adopted and/or time per unit, the adjusting of the standard setting that can stop air being supplied with.

According to further embodiment, such as, of WO2007/071350, the weaving speed that the standard setting of supplying with according to the compressed air of main burner device and/or at least one cover relay nozzle is regulated loom.Once more, regulate the weaving method of velocity for fear of being intended to offset the change of average weaving speed and the control method done according to the present invention between conflict, one of two kinds of methods of interrupting or stopping under given conditions.Such as, if reach the limiting value of weaving speed, can stop adjusting to the standard setting of air supply.

Can also realize above-mentioned purpose through the air-jet loom that comprises main burner device and at least one cover relay nozzle; Wherein this air-jet loom comprises a kind of device, and this device has adopted the method for the standard setting of the compressed air supply of regulating main burner device and at least one cover relay nozzle.

Preferably, air-jet loom comprises the device that contains control module and a plurality of cutout valves that can be controlled unit controls.Cutout valve allows the adjusting to the air supply, and the air that allows particularly to interrupt specific complete relay nozzle and/or main burner device is supplied with.

Preferably, the main burner device comprises fixedly main burner or attached main burner and removable main burner.

Description of drawings

Further aspect of the present invention and advantage will through down in the face of shown in the accompanying drawing with dependent claims in the description of the illustrative embodiments that limits be able to manifest.

Fig. 1 shows the sketch map according to the part of air-jet loom of the present invention.

Fig. 2 shows to main burner device and continuous cover relay nozzle and supplies with compressed-air actuated standard setting figure.

Fig. 3 shows and supplies with compressed-air actuated standard setting figure to main burner device and cover relay nozzle continuously after the adjusting.

Fig. 4 shows and supplies with compressed-air actuated standard setting figure to main burner device and cover relay nozzle continuously after the further adjusting.

Fig. 5 shows and another kind of supplies with compressed-air actuated standard setting figure and actual set figure to main burner device and cover relay nozzle continuously after further regulating.

Fig. 6 show after the adjusting on the time point of further regulating to the compressed-air actuated standard setting figure of main burner unit feeding.

Fig. 7 shows standard setting figure and the actual set figure to continuous cover relay nozzle compressed and supplied air after the adjusting on another time point of further regulating.

The specific embodiment

Fig. 1 shows the device that a kind of shed open 1 that passes the indicative icon of air-jet loom transported or inserted weft yarn.This device comprises two feed paths 2,3 that weft yarn 4 or 5 are provided respectively.Each feed path 2,3 all comprises yarn buffer 6, weft accumulator (prewinder) 7 and the main burner device 70 that comprises main burner 8 and attached main burner 9.Main burner 8 and attached main burner 9 are installed in series near shed open 1, and particularly, according to the moving direction of weft yarn, main burner 8 is installed near the shed open 1, and attached main burner 9 is installed in before the main burner 8.Main burner 8 also is called as second or removable main burner, and attached main burner 9 also is called as first or fixing main burner.Air-jet loom comprises reed (reed) 10 in addition, wherein is provided with guiding channel 40, thereby allows via this guiding channel 40, utilize compressed air to pass shed open 1 transported weft thread.Near this guiding channel 40, along shed open 1 relay nozzle 11,12,13,14,15,16,17,18 and 19 of continuous cover is installed, particularly, said nozzle is installed so that utilize the air for continuous support shute along guiding channel 40.

Each all is connected main burner 8 with compressed air source 23 with choke valve 22 through relevant cutout valve 21.Each all is connected attached main burner 9 with compressed air source 23 with choke valve 25 through relevant cutout valve 24.Every cover relay nozzle 11,12,13,14,15,16,17,18 and 19 is all passed through cutout valve 31,32, and 33,34,35,36,37,38,39 are connected with compressed air source 23 with relevant choke valve 26 in a similar fashion.According to a kind of unshowned modification, can omit choke valve 26.Compressed air source 23 can comprise the compressed air accumulator that at least one connects with respective nozzles.In addition, draw jet 27 is illustrated, in case it is used to weft yarn when being inserted into, makes weft yarn keep stretching.Draw jet 27 is connected with compressed air source 23 with choke valve 29 through cutout valve 28.With the end of the terminal opposite guiding channel 40 that main burner 8 is installed, yarn detector 41 is mounted for detecting when weft yarn 4,5 arrives or pass through this yarn detector 41.

As shown in Figure 1, cutout valve 21,24,28,31,32,33,34,35,36,37,38 and 39 are controlled by the control module of air-jet loom 42 with 29 with choke valve 22,25,26.Such as, cutout valve is can be by the electromagnetic valve of control unit 42 controls.In this case, choke valve can be designed to make that they can be by motor-driven with by control module 42 controls.Adopt device 71 according to the method for the invention to comprise control module 42 and a plurality of said cutout valves at least.

Weft yarn 4,5 is blown into guiding channel 40 by main burner 8, and by deeper being blown into along guiding channel 40 from the compressed-air actuated jet of many covers relay nozzle 11 to 19.Such as, guiding channel 40 is installed in 10 li of reeds, and in the process that weft yarn 4,5 inserts, is brought into shed open with known manner.At the end of guiding channel 40, yarn detector 41 is arranged the arrival that is used to detect weft yarn.Main burner 8 overlaps relay nozzle 11 to 19 more, draw jet 27, and reed 10 and yarn detector 41 are attached on unshowned, the slay that moves reciprocatingly with known manner.Yarn buffer 6, weft accumulator 7 is attached on the frame of air-jet loom with attached main burner 9.

Such as, yarn detector 41 is connected with control module 43 through connecting line 44.Control module 43 is connected with control module 42 through connecting line 45.According to a kind of unshowned modification, control module 42 can be as the part of an independent control unit with control module 43.Cutout valve is connected with control module 42 through shared connecting line 50 with choke valve.Each weft accumulator 7 comprises needle 46 so that discharge the weft yarn 4 or 5 of desired length at the expected time point.Needle 46 is connected with control module 42 through shared connecting line 49.

Fig. 1 also shows near the yarn detector 47 each weft accumulator 7, at every turn around yarn 48 from weft accumulator 7 around the tube unwinding time, more specifically, the part of each weft yarn arrive or along yarn detector 47 through out-of-date, this yarn detector 47 sends signal to control module 43.This yarn detector 47 also is called as around yarn sensor.In this example, the signal of yarn detector 47 is imported into control module 43 through connecting line 57.Signal through yarn detector 47 obtains betransporteding the measurement of weft yarn 4,5 in the process of this weft yarn 4,5 of transportation here.In view of the above, more specifically so-called around the yarn time point with respect to the reference time point, the time point that arrives yarn detector 47 around yarn 48 is measured.Such as, be triggered with respect to needle 46 and measure around the time point of yarn 48, and this time point is to represent around the yarn time point through yarn detectors 47 with the time point that discharges weft yarn 4 or 5.The continuous signal of yarn detector 47 can be used as the measured value that betransported weft yarn 4,5 in the transportation.In view of the above, can measure or the one or more absolute times of definite unwinding around yarn.

Alternatively, a plurality of yarn detectors 54,55,56 can along guiding channel 40 be mounted with the front end that detects weft yarn when arrive these yarn detectors one of them.Yarn detector 54,55,56 can be through connecting line 51 and control module 43 synergies.

As shown in Figure 1, air-jet loom also comprises input block 52, and it makes some parameters of input become possibility.Control module 42 is used to come display parameters through display unit 53.Such as, connecting line 49,50,51 and 57 can be the CAN-bus.

Such as, when weft yarn 4,5 betransported when passing shed open 1, cutout valve 21,24,31 to 39 are triggered according to chart as shown in Figure 2.In this example, cutout valve 31 to 39 is by continuous trigger.For air-jet loom, weave with the weaving speed magnitude of 800 to 1200 weft yarns of per minute usually, change kind of an expression and promptly be, such as, as far as two meters weaving width, 1400 to 2800 meters of per minutes.When the irregular weft yarn of weaving; Such as, when the spinning insertion weft yarn of weaving, as far as continuous weft from feed path 2 or 3; The insertion parameter that records maybe be quite different according to the difference of weft yarn; In other words, in the weaving cycle, the time point that specific weft yarn arrives the yarn detector is different.

Fig. 2 shows through piece 61 to 69; The 9 cover relay nozzle of representing with BB11 to BB19 respectively 11 to 19 are supplied to the compressed-air actuated period; In other words, open cutout valve as shown in Figure 1 31 to 39 and be provided the compressed-air actuated period with relay nozzle 11 to 19 to relevant cover.To main burner 8 and attached main burner 9 be provided the compressed-air actuated period, by

piece

20 and 30 expressions, be expressed as MMN8 and FMN9 respectively.WO2007/057217 has explained this more details, and the content of WO2007/057217 is incorporated the application by reference into.

Piece

20,30 and 61 to 69 has been confirmed the time point that beginning air time point of supplying with and the air that interrupts respective nozzle are supplied with.In Fig. 2, the time is represented with the position, 0 to 360 degree angle of loom main shaft.The time point of each position, angle in the corresponding weaving cycle, the in other words time of each position, angle in the corresponding weaving cycle.

In Fig. 2, the mobile route of line 58 expression normal weft, the mobile route of the quick weft yarn of line 59 expressions, and the mobile route of line 60 expression slow

weft thread.Line

58,59 and 60 can be during weaving a large amount of weft yarns-such as several thousand weft yarns be determined according to the standard setting of many covers relay nozzle of Fig. 2.Time point TG is the definite reference time point in the weaving cycle, such as, loom arrives the specific angle position particular selected time afterwards in the weaving cycle.The meaning of TG will be explained hereinafter in more detail.

If the loom predetermined or that primary standard is set with being set according to break period of Fig. 2 point and/or period is accomplished weaving; And be activated according to method of the present invention; Preferably; Preassigned setting according to Fig. 2 is adjusted to according to the setting of the preassigned after the adjusting of Fig. 3 automatically, after this is called " standard setting after the adjusting ".Adopt and be somebody's turn to do " standard setting after the adjusting ", the compressed air supply at least one cover given trunk nozzle in the weaving cycle is interrupted than adopting the primary standard according to Fig. 2 to set more Zao.

Fig. 3 shows the standard setting after the preferred adjusting with abdomen shape pattern.According to standard setting as shown in Figure 3, the setting of the relay nozzle of center, that cover relay nozzle 15 among the embodiment promptly as shown in Figure 1 is conditioned through shortening 5% of the air supply period.The air supply period of adjacent with this cover center relay nozzle two cover relay nozzle-be said cover relay nozzle 14 and 16 is shortened 3%.The period of next-door neighbour's two cover relay nozzle-be said cover relay nozzle 13 and 17 only is shortened 1%, and the period of and a few cover relay nozzle of side-be said cover relay nozzle 11,12,18 and 19 is not shortened at this adjusting time point.It is as shown in Figure 3 that the air that shortens is supplied with the period.For the sake of clarity, be represented by dotted lines in Fig. 3 according to the standard setting before the adjusting of Fig. 2.

Such as, similar with the described mode of WO2007/057217, for the situation of slow weft thread; Promptly such as; After time point TG, arrive the weft yarn of measurement point, this slow weft thread will be inserted into according to setting as shown in Figure 2, and normal or quick weft yarn will be inserted into according to the setting according to Fig. 3.

According to the present invention, adjustment criteria is set, and observes the stability that weft yarn inserts.When after weft yarn is inserted in regulating step, as if stablizing, can set actual standard and further regulate.When finding that weft yarn inserts when unstable, performed adjusting is cancelled, and/or press the setting of opposite direction adjustment criteria.Therefore, the standard setting of supplying with to the air of said many cover relay nozzle 11 to 19 and/or

main burner

8,9 is optimised.

According to a preferred embodiment, supply with optimization in order to make compressed air, adopt the standard setting after regulating, compressed air extremely fixing or attached main burner 9 is supplied with and is reduced.Preferably, the minimizing of supplying with to the compressed air of attached main burner 9 was accomplished through the air supply period that shortens shown in the chain-dotted line of the piece among Fig. 3 20.In order suitably to get into shed open, preferably do not reduce the compressed air of main burner 8 and supply with the period at the porch of shed open guiding weft yarn.

Supply with that the period reduces but weft yarn inserts when still keeping stablize when the air of the main burner 8 of at least one cover relay nozzle 11 to 19 and/or main burner device 70 and/or 9, the main burner 8 of at least one cover relay nozzle 11 to 19 and/or main burner device 70 and/or 9 compressed air supply period can be by further minimizings.In view of the above or as a kind of selection, the compressed air that overlaps relay nozzle 11 to 19 is at the most supplied with can be by further minimizing.The minimizing of preferably, overlapping the compressed air supply of relay nozzle 11 to 19 is at the most accomplished through the setting with abdomen shape pattern (belly pattern).

Fig. 4 and Fig. 5 schematically show the according to an embodiment of the invention second and the 3rd and regulate time point, and wherein with respect to setting as shown in Figure 2, the break period in the weaving cycle is by in advance.For the sake of clarity, the standard setting of the Fig. 2 before the adjusting is represented by dotted lines in Fig. 4 and Fig. 5.Can adopt foregoing " standard setting " at very first time point, as shown in Figure 3.If it is stable that weft yarn inserts maintenance, further shifted to an earlier date the break period of then overlapping the air supply of relay nozzle 11 to 19 at the most.In like Fig. 4 and embodiment shown in Figure 5; The break period of that cover relay nozzle 15 among this cover center relay nozzle-be embodiment as shown in Figure 1, shorten air supply period of 10% or 15% with respect to the example of Fig. 2 and regulate through regulating time point the second and the 3rd respectively.Two cover relay nozzle of next-door neighbour center relay nozzle, promptly said cover relay nozzle 14 and 16 air are supplied with the period and are shortened 6% and 9% at the second and the 3rd adjusting time point with respect to the example of Fig. 2 respectively.Ensuing two cover relay nozzle; Be that the air of said cover relay nozzle 13 and 17 is supplied with the period and is shortened 2% and 3% at the second and the 3rd adjusting time point with respect to the example of Fig. 2 respectively; And many covers of side relay nozzle; The period that is said many cover relay nozzle 11,12,18 and 19 is not shortened.The air that reduces is supplied with the period shown in Figure 4 and 5.Certainly, also can adopt other abdomen shape pattern.When detecting unsettled weft yarn after regulate according to the standard setting after the adjusting of Fig. 5 and inserting, standard setting can be reset the standard setting before being, such as, reset to standard setting shown in Figure 3.According to a kind of modification, can be reset in view of the above according to the standard setting of Fig. 5 and to be standard setting shown in Figure 4.

Such as; Similar with the described mode of WO2007/057217, for the situation of slow weft thread, promptly such as; After time point TG, arrive the weft yarn of measurement point; This slow weft thread is inserted in setting shown in

piece

64,65 among employing Fig. 5 and 66 the chain-dotted line, and adopts the standard setting according to Fig. 5 to insert normal or quick weft yarn.

As a kind of selection, as shown in Figure 6, insert if when the standard setting that adopts according to Fig. 5, detect unsettled weft yarn, then can avoid unstability through the winding-up period that reduces attached main burner 9.Piece 20 among Fig. 6 shows the winding-up period of attached main burner 9, and the winding-up period of minimizing is represented with solid line, and the period of initially jetting is represented by dotted lines.More specifically, interrupt to be shifted to an earlier date to the time point or the moment in the weaving cycle that the compressed air of attached main burner 9 is supplied with.Such as, the weft yarn of measuring according to yarn detector 41 arrives the last around the yarn average deviation of the time difference between the time of terminal time of shed open and 47 measurements of yarn detector, accomplishes adjusting.Weft yarn arrives the terminal time point of shed open and also is called as the TA time of advent.Detect last time point around yarn also is called as at last around yarn time T LW at yarn detector 47 places.

According to an embodiment, the function of regulating the break period point of attached main burner 9 can be chosen to be with respect to primary standard set have the time of advent TA and the deviation of last current difference between yarn time T LW 50%.Such as, if being denoted as primary standard, time difference TA-TLW=1 millisecond sets, and as far as the standard setting time difference TA-TLW=3 millisecond after regulating, the winding-up time of then attached main burner 9 can be shortened 50% of (3-1) millisecond or 1 millisecond.In other words, in this example, the break period of the attached main burner 9 in the weaving cycle is by 1 millisecond in advance.This break period point in advance can average time difference be the basis, and can adopt with the said similar method of WO2006/114187 so that utilize mean value.

Another selection of above-mentioned example is can millisecond be shortened until the TA-TLW value by every step 0.5 the winding-up time of attached main burner 9 to reach 1 millisecond again.Select according to another, 5% of the winding-up time that the winding-up time of attached main burner 9 can each attached main burner 9 is calculated section set by step and is reached desired value again until the TA-TLW value.

When weft yarn inserts and do not stablize yet after regulating at this, can shorten the winding-up time of attached main burner 9 further.If weft yarn inserts stable, the winding-up time of overlapping relay nozzle 11 to 19 can be shortened further.Such as, through reducing the winding-up time of attached main burner 9, can adopt the abdomen shape pattern winding-up times of for example this cover center relay nozzle 15 being regulated the many covers of 30% further shortening relay nozzle 11 to 19 as shown in Figure 7.In the embodiment of Fig. 7, the winding-up time of this cover relay nozzle 12 also is shortened.

Become unstable if under this setting, insert, the standard setting before the setting of then many cover relay nozzle 11 to 19 and/or the setting that main burner device 70-specifically is attached main burner 9 can be adjusted to once more.

According to an embodiment, confirm that when reaching at least one preestablished limit value unsettled weft yarn inserts.

In addition, for attached main burner 9, the maximum minimizing of winding-up time can be set at respect to 20% of primary standard setting or any other value of the time of initially jetting.Preferably, set limited field in advance, such as when selecting the slight effect of main burner device 70, the limit before reducing can be set in 15%, and when selecting average or high the influence, the limit of minimizing can be set in 20% or 25% respectively.

Such as, in order to observe the stability that weft yarn inserts, can measure and arrive one or more weft detectors 41,47,54,55,56 time, can compare the time of advent that records with the expected approach time of inserting weft yarn.If the time difference that records between time and expected time surpasses threshold value, can assert that the weaving error possibly take place, and the weft yarn insertion is unsettled.

According to an embodiment, the unwinding time of the weft yarn at weft accumulator 7 places and the time that arrives shed open 1 exit, measure through yarn detector 47 and 41 respectively, and the time difference is determined.If the time difference surpasses threshold value, can assert that the weaving error possibly take place, and the weft yarn insertion is unsettled.

Regulate with unstable for fear of measure error; Confirm the average arrival time of some specific insertions; And arrive the expected time of measurement point and arrive time difference between average time of this measurement point when surpassing predetermined threshold when inserting weft yarn, can assert has the weaving error.

As previously mentioned, slow weft thread can be distinguished through the weaving techniques according to WO2007/057217 with quick weft yarn.According to the specific measurement that betransported weft yarn, compressed-air actuated supply is interrupted after institute's accepted standard is set the time point of appointment, passes shed open 1 if confirm that relative weft yarn at a slow speed betransported.In this case, the compressed-air actuated supply period of many cover relay nozzle is extended with respect to institute's accepted standard setting in transportation slow weft thread process.

Such as, can and detect definite compressed air of the specific time difference between the time point of yarn of passing yarn detector 47 based on for example predetermined point of time TG and supply with time or the period that is extended.Time point TG is the scheduled time or the threshold value for the point of the reference time in the weaving cycle; Such as, the specific particular selected time point that normally passes through the yarn detector around yarn in particular selected time after the time point of the specific angle position of loom in the arrival weaving cycle or weaving cycle.Based on this purpose, time point TG can be optimized by control module 42 by 52 inputs of the input block in the control module 42, perhaps carries out manual adjustment with the described mode of WO2007/057217 by the operator.

Embodiment as shown in Figure 7 supposes that weft yarn has five length around yarn, is respectively t1w around the yarn signal wherein; T2w, t3w, t4w and t5w; And such as; The second signal t2w around yarn, in other words the secondary signal of yarn detector 47 is used to control the interruption that the compressed air of certain set relay nozzle is supplied with.In this case, second will compare with the time point TG in the weaving cycle around the time point of yarn signal t2w.

If this second recording after signal t2w occurs in the time point TG in the weaving cycle around yarn; That is, insert weft yarn relatively at a slow speed, the compressed air of complete relay nozzle 13 to 17 is supplied with and will be interrupted subsequently; Such as, this period can be extended to the actual set shown in chain-dotted line among Fig. 7.In other words, supply with to the compressed air of complete relay nozzle and to be extended, and interrupt being postponed with respect to the standard setting after the adjusting shown in solid line among Fig. 7.The supply of this prolongation takes place with the described mode of WO2007/057217.

According to a kind of modification; Also of WO2007/057217, the standard setting of slow weft thread after through the adjusting that is used to interrupt compressed air and supplies with is inserted into, such as; Standard setting among Fig. 6; And normal or quick weft yarn is inserted into through actual set, and wherein the interruption supplied with of compressed air is advanced in the weaving cycle time point more early, such as than the time point of the standard setting time point among Fig. 6 in the more Zao weaving cycle.

When this second around yarn record time point TG or its of signal t2w in the weaving cycle before take place; Promptly; Normally or relatively fast weft yarn is inserted into, and will interrupt according to the predetermined standard setting that is employed shown in solid line among Fig. 7 supplying with to the compressed air of complete relay nozzle 13 to 17.

Clearly, a cover relay nozzle can comprise at least one independently relay nozzle or a plurality of relay nozzle that is connected with compressed air source through relevant cutout valve.The device that is used for the compressed air supply can be arbitrary device that compressed air is supplied with of setting, control or regulate.According to disclosing of EP442.536B1 or WO2006/077063; The adjusting that the compressed air of main burner 8 or attached main burner 9 is supplied with can comprise operated throttle valve 22 and 25 in the following manner, on average arrives such as yarn detector 41 places at identical time point in the weaving cycle such as each weft yarn.For example this means that even if do not consider the change (for example this possibly take place) of the character of the weft yarn of insertion continuously under the situation of filament weft yarn, the line 58 of average weft mobile route as shown in Figure 2 does not change because of continuous weft.

The present invention's permission comes adjustment criteria to set so that the time point that interruption is supplied with the air of at least one

main burner

8,9 of at least one cover relay nozzle 11 to 19 and/or main burner device 70 is shifted to an earlier date according to consecutive steps.The continuous adjusting of standard setting can stop, if confirm to insert unstable, if or reach the advance limitation value of the interruption of at least one cover relay nozzle; Such as this cover center relay nozzle is reached 30%; 40%, 50% or 60%, if and/or reach the advance limitation value of the interruption of main burner; Such as fixing main burner 9 is reached 15%, 20% or 25%.If for example adopt the present invention and combine the described method of WO2007/071350; The adjusting of standard setting can stop; If if force value and/or time per unit air flow value reach its peaked such as 98% and/or during carrying out method of the present invention loom speed reduced particular percentile, such as 3% or 5%.

If 30% of above-mentioned center one cover relay nozzle limiting value is provided, such as, can progressively be employed until the limiting value that reaches 40% by each 5% according to the method for the invention.If adopt 40% wild effect does not take place yet, can be limited to 30% setting limiting value again.In this case, the standard setting after the adjusting is reset the standard setting to two adjustings, is consistent with 30% limiting value in view of the above.Take place if be set in 35% o'clock wild effect, from the consideration of security and reliability, but reset to 25% or two adjusting value before, although do not observe wild effect during 30% limiting value yet.

Certainly, the invention is not restricted to the application of the standard setting shown in Fig. 2 to 7, also other standard settings can be set.Such as, according to a kind of possibility, control module 42 can be transfused to: to which cover relay nozzle can regulate, such as overlapping relay nozzle 17 to said one.The set basis the present invention who this means many cover relay nozzle 17,18 and 19 is not conditioned.Any also can import: can carry out the adjusting of standard setting from cover relay nozzle, such as overlapping relay nozzle 13 from said one.The set basis the present invention who this means complete relay nozzle 11 and 12 can not regulate.Such as, according to another kind of possibility, can import or avoid: set basis the present invention of certain set relay nozzle can not be conditioned.

Clearly, adjustment criteria is set and is nonessential with every step 5%, and 3% or 1% carries out, but can regulate in every way, such as, regulate according to the different functions of preserving in the control module 42 for example.

According to a kind of unshowned modification, the standard setting of the cutout valve 28 of control stretching nozzle 27 also can be determined and regulate according to the method for the invention.

According to Fig. 2 to 7 be used for supply with compressed-air actuated every width of cloth figure to above-mentioned continuous cover relay nozzle and all represent with the angle of loom main shaft.When knowing the speed of loom, every width of cloth figure can be converted into chronomere easily, i.e. millisecond.

Following advantage is arranged according to the method for the invention: air consumption roughly can reduce.According to the present invention,, save most of compressed air than earlier interrupting near the relay nozzle of the general alignment shed open center in excentral complete relay nozzle with respect to initial setting.

Clearly, air-jet loom is not limited only to weft yarn is blown into guiding channel 40 through compressed air air-jet loom.The complete relay nozzle of air-jet loom also can be set on the weft yarn clamper that passes the shed open transported weft thread.In addition, as common compressed-air actuated substituting, any desired fluid can be used to weft yarn is inserted the shed open of the type loom.In this case, also can use the common compressed air that mixes a kind of gas, liquid or steam.

Clearly, no matter this specification is mentioned the fact of time, the angle that this time also can loom is represented.In this case, such as, the angle of loom corresponding to some milliseconds or one millisecond corresponding to some angles.

Clearly, can be used in weft yarn 4 or 5 arbitrary insertion according to the method for the invention.In view of the above,, can provide a width of cloth independently to scheme, be used for supplying with to the compressed air of continuous cover relay nozzle and/or main burner device 70 for every weft yarn 4 or 5.The figure that inserts every weft yarn can differ from one another, particularly, if weft yarn 4 or 5 is weaved with different weaving speed or travelling speed.Particularly, when loom speed is conditioned to being inserted into weft yarn, can adopt this scheme.Certainly, if use the weft yarn of one or more types, also can adopt according to the method for the invention.

The embodiment (be illustrated and described) that is not limited to provide as an example according to the method for the present invention that limits in the claim and air-jet loom, but also comprise modification and the combination in the scope that falls into claim.

Claims

1. method that is used for weft yarn (4,5) is inserted the shed open of air-jet loom; Said air-jet loom comprises main burner device (70) and at least one cover relay nozzle (11 to 19); Wherein be determined to said main burner device and/or the compressed-air actuated standard setting of at least one cover relay nozzle (11 to 19) supply; It is characterized in that; Supply with compressed-air actuated standard setting to said main burner device (70) and/or at least one cover relay nozzle (11 to 19) and be conditioned reducing compressed-air actuated supply, and under the situation that adopts the standard setting after regulating, can observe the stability that weft yarn inserts.

2. the method for claim 1 is characterized in that, is conditioned to said main burner device (70) and/or the compressed-air actuated standard setting of at least one cover relay nozzle (11 to 19) supply, inserts until weft yarn and becomes unstable.

3. according to claim 1 or claim 2 method; It is characterized in that; In order to regulate said standard setting, according to the measurement that is inserted into weft yarn (4,5) being regulated the interruption of supplying with to the compressed air of said main burner device (70) and/or at least one cover relay nozzle (11 to 19).

4. like each described method in the claim 1 to 3, it is characterized in that, when the weft yarn insertion becomes instability, regulate to the compressed air of said main burner device (70) and supply with, supply with such as reducing said compressed air.

5. like each described method in the claim 1 to 4; It is characterized in that; Said main burner device (70) comprises first main burner (9) and second main burner (8); Wherein when the weft yarn insertion becomes instability, regulate to the air of first main burner (9) and supply with, supply with such as reducing said air.

6. like each described method in the claim 1 to 5; It is characterized in that; When the weft yarn insertion becomes instability, regulate the standard setting of the air supply of at least one cover relay nozzle (11 to 19), such as the interruption of the compressed air supply that postpones at least one cover relay nozzle (11 to 19).

7. like each described method in the claim 1 to 6, it is characterized in that, continuous many covers relay nozzle (11 to 19) is provided, the standard setting that the compressed air that wherein adopts abdomen shape pattern to regulate said many cover relay nozzle (11 to 19) is supplied with.

8. like each described method in the claim 1 to 7, it is characterized in that, when detecting unsettled weft yarn and insert, the standard setting before standard setting reset to.

9. like each described method in the claim 1 to 8, it is characterized in that, confirm that through detecting at least one weaving error unsettled weft yarn inserts.

10. method as claimed in claim 9; It is characterized in that; Measured time point detects the weaving error when time difference between the measured time point is above predetermined threshold when inserting weft yarn (4,5) and arrive second measurement point when inserting weft yarn (4,5) and arrive first measurement point.

11. like claim 9 or 10 described methods; It is characterized in that; When inserting weft yarn (4,5) and arrive first measurement point measured time point when inserting weft yarn (4,5) and arrive second measurement point between the measured time point average time, difference was above predetermined threshold the time, detect the weaving error.

12. like each described method in the claim 1 to 11; It is characterized in that; Be conditioned to said main burner device (70) and/or the compressed-air actuated standard setting of at least one cover relay nozzle (11 to 19) supply, until at least one limiting value that reaches standard setting.

13. an air-jet loom that comprises main burner device (70) and at least one cover relay nozzle (11 to 19) is characterized in that this air-jet loom comprises the device (71) of each said method in employing such as the claim 1 to 12.

14. air-jet loom as claimed in claim 13 is characterized in that, said device (71) comprises control module (42) and a plurality of cutout valve (21,24,28,31 to 39) that can be controlled unit (42) control.

15., it is characterized in that said main burner device (70) comprises fixedly main burner (9) and removable main burner (8) like claim 13 or 14 described air-jet looms.