CN1701140A - Method for holding a weft yarn, and a jet weaving machine, particularly serving to carry out this method - Google Patents
Method for holding a weft yarn, and a jet weaving machine, particularly serving to carry out this method Download PDFInfo
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- CN1701140A CN1701140A CN 03825247 CN03825247A CN1701140A CN 1701140 A CN1701140 A CN 1701140A CN 03825247 CN03825247 CN 03825247 CN 03825247 A CN03825247 A CN 03825247A CN 1701140 A CN1701140 A CN 1701140A
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- weft yarn
- mixing tube
- clamping
- compressed air
- wefting insertion
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- 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
- D03D47/3053—Arrangements or lay out of air supply systems
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- 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
- D03D47/3013—Main nozzles
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- Textile Engineering (AREA)
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Abstract
The invention relates to a method for holding a weft yarn (9) in the area of a main jet nozzle of a jet weaving machine, particularly an air jet weaving machine, particularly having multicolored pick, before a weft yarn (9) is inserted into a shed (20) formed by warp yarns (10). According to the invention, the weft yarn (9) is clamped in a direction of insertion after an injector (1) in the mixing tube of the main jet nozzle and is released shortly before insertion when a pressure pulse for inserting the weft yarn (9) is initiated by the main jet nozzle. In order to control the corresponding jet weaving machine, a clamping device (6) has a pressure sensor (7) that is connected to a compressed air source (8), a machine control (13), valves (8) and to a compressed air supply (3) of the injector (1) via signal lines (11) and (14) and via compressed air lines (15) and (17). The clamping device (6) is located between a first mixing tube section (4) and a second mixing tube section (5) to which a cutting device (18) is connected. The invention also relates to a method during which the weft yarn section is clamped, whereby holding air is only injected during the time between the capture-side arrival of a weft yarn (9) which was inserted immediately before, and the initiation of the pressure pulse for inserting the next weft yarn, which is required according to the pattern, during a released clamping.
Description
The present invention relates in the mixing tube of the main burner of jet loom, especially an air-jet loom, before weft yarn enters in the shed open that is formed by warp thread, maintain a kind of method of weft yarn.
Itself deposit the yarn device, be also referred to as pre-winding device or pre-doff device flows to main burner pneumatic action, that be expressed as a kind of weft inserting apparatus with specific length with the weft yarn in the being introduced into shed open by a kind of what is called in regard to known jet loom described.This main burner has an injector and a mixing tube, and this mixing tube is accepted a weft yarn and before weft yarn being introduced shed open it maintained there.The remainder of weft yarn main burner and deposit between yarn device/pre-winding device and deposit yarn device/pre-winding device originally on one's body, and before the introducing weft yarn, maintain in advance there.
The weft yarn that will be arranged in the main burner mixing tube in the air-jet loom of knowing maintained by means of air flow before it enters with stretching, and this air flow acts on the direction of longitudinal central axis line of mixing tube.Must before entering shed open, it will keep in the whole time that weft yarn maintains in advance for this reason that air is corresponding to be blown in the mixing tube in given mode consumingly.Compare with the time in weft yarn remains on the mixing tube of main burner, the real wefting insertion time is very short, and depends on the yarn qualities when pressure is 1.0 to 6 crust, wherein keeps the pressure of air to be generally 0.1 to 1.5 crust.
Often for some fabric, especially need a plurality of main burners with style relevantly.Described weft yarn the time in the mixing tube of main burner of remaining on is depended on the decorative pattern circulation or depends on that style ground was compared with the very short wefting insertion time and extends four times under certain condition again.
In order to maintain a kind of other also necessary, constant as far as possible yarn tension concerning the high-quality fabric, maintenance air in the main burner is further improved, so that reach constant as far as possible identical yarn tension than normal yarn.Yet pressure higher in main burner/injector generally can cause higher air loss.
A kind of device that is used to introduce the weft yarn that loom with at least one nozzle uses has been described in WO 00,/52 242, this device has the ostium that a kind of pressure medium is used, the longitudinal axis that the structure in this hole should make pressure medium center on nozzle rotates, thereby giving one, to be positioned at one of weft yarn in this device twisted or a kind of subsidiary twisted.The described pressure medium that also has a kind of vortex makes weft yarn keep one long period between each latitude, wherein should avoid a kind of overgenerous twisted, because otherwise may make the fabric quality variation.Basically all act in the whole time on the weft yarn in the mixing tube of air flow at main burner that has a kind of vortex described in this known air-jet loom, this weft yarn is then waiting it and is entering in the shed open.Starting described shortcoming with maintenance air sticking still exists.
Known by DE 32 00 638 A1, the clamping by machinery remains on weft yarn in the mixing tube of main burner of an air-jet loom.This required clamping device is arranged in the port of export place of mixing tube, is transferred in the shed open at this mixing tube back weft yarn.Clamping device for example can be in a guiding valve, and this guiding valve laterally can slide as hoisting mechanism perpendicular to the longitudinal direction of mixing tube, and will be clamped at the weft yarn in the mixing tube between the inwall of the through hole of guiding valve and mixing tube.Another kind of form of implementation then has a laterally drift slidably, and it is pressed onto weft yarn on the inwall of mixing tube.The another kind of form of implementation that also has known mixing arrangement at last is designed to flexible middleware by a part of position of this form mixing tube.This middleware should compress by two opposed hoisting mechanisms in mutual diameter ground, if these hoisting mechanisms are mutually facing to motion.Weft yarn is clamped by the elasticity middleware that compresses.
When clamping weft yarn is displaced sideways in first kind of the clamping device of this air-jet loom and second kind of version, weft yarn just no longer is positioned on the central longitudinal axis of mixing tube.Even also worrying in the third version has this phenomenon, be used for flexible middleware pinched togetherly because only be provided with two hoisting mechanisms, this extruding that is to say not to be that strictly carry out symmetrically at the center.Weft yarn be positioned at outside the mixing tube longitudinal center a position be close to be introduced into weft yarn in the shed open time just cause difficulty.
How in DE 32 00 638 A1, not to be described in detail the mechanical handling mechanism of detailed design clamping device.But for guiding valve, drift that stroke is adjustable or be used to push the hoisting mechanism of described elasticity middleware, in any case all need the driving mechanism of a machinery, not vibration when its requires to have certain installing space and work.For this in background technology with regard to method on the pan, should be noted that to produce uncontrollable oscillating motion that the free end of mixing tube just has this oscillating motion when handling the yarn clamp mechanism.Because the space that is especially provided when multicolor weft insertion is very restricted for being close to the mixing tube that is arranged side by side mutually in a large number, therefore described known solution can not be implemented without difficulty in practice.The vibration of the machinery of mixing tube or vibrations have also destroyed the accurate function of this jet loom in addition.
WO 02/095106 A1 relates to a kind of air-jet loom, wherein a plurality of main burners that have attached mixing tube is combined into the device that is arranged in parallel of a compactness.Therefore this known air-jet loom is used for making weaving pattern and the multiple color of processing.The described weft yarn that is positioned in main burner and the mixing tube maintains by clamping action here, until released being used for till the wefting insertion of weft yarn of indication.Clamping device is arranged between an auxiliary blowing nozzle and the main blowing nozzle, just is positioned at the main burner porch all the time, and therefore is positioned at outside the mixing tube.Not necessarily within mixing tube, does not unclamp afterwards with in the heart introducing shed open in the weft yarn if therefore there is other measure just can not remain on weft yarn the position of weft yarn in this layout.Even in the air-jet loom according to WO 02/095106 A1, described clamping device also is provided with the clamping element of machinery in addition.Make herein be designed to piston or pressure punch vertically movably clamping element pneumatically move.They clamp attached weft yarn towards the inwall of clamping device under the influence of overvoltage, clamping element reset and therefore unclamping then of weft yarn so realize: clamping element is connected on the negative pressure source.The device that therefore will be used to maintain different weft yarns in this known jet frame very compactly assembles up.Weft yarn is clamped in the porch of main burner and the mechanical grip element that Application Design gets comparatively robust, although adopt air-operated control mechanism but still cause some above-mentioned shortcomings, just the position of weft yarn is uncertain in mixing tube, and can not get rid of the vibration of machinery.
Also known at last have a kind of method that is used for maintaining in the porch of a main burner weft yarn, wherein make weft yarn before entering main burner, press to the inlet (summary of Japan Patent 11200193A, 99 years 07 month 27 days) of a bypass duct by means of compressed air by laterally becoming a mandarin.Weft yarn then stands a kind of vertical and horizontal simultaneously at this moment and becomes a mandarin, therefore by means of keeping air not get rid of the shortcoming that maintains weft yarn.
Task of the present invention by comparison is to propose a kind ofly to be used to maintain at a jet loom, especially the method for the weft yarn in the mixing tube of the main burner of air-jet loom, and a kind of jet loom of implementing the method, with this method and loom just can be substantially and the kind of weft yarn and quality irrespectively significantly reduce the amount of required maintenance air, even need not keep air fully, wherein can also make main burner and mixing tube realize compact multiple layout, refuse when making fabric also reduces, and, improved the quality of made fabric simultaneously on the whole because the adverse effect to weft yarn has been eliminated in this maintenance.
Described task according to first kind of solution by solving by described method of claim 1 and jet loom described by claim 8, that be particularly useful for implementing this kind method.Another kind of solution is illustrating in described method neutralization, the jet loom that is particularly useful for implementing the method described by claim 24 by claim 20.The design of the independently solution that these are different is the theme of dependent claims.
Be according to solution of the present invention for described first kind by claim 1, in the mixing tube of the main burner of a kind of jet loom, especially air-jet loom, enter into the method that before the shed open that constitutes by warp thread this weft yarn is maintained at a weft yarn, wherein the partial portion of mixing tube flexible structure is by being compressed by means of the loading from the outside of a kind of pressure medium, and weft yarn clamped maintain.
Therefore can carry out manipulation pure hydraulic pressure or pneumatic according to the method, its method is that a kind of pressure medium compresses the flexible part that is designed to of described mixing tube.Weft yarn maintains clampedly; This clamping makes that the yarn of weft yarn can the sex change of sharp ground.Show that it is not dangerous clamping this, described maintenance air then relatively apace, just makes yarn generation sex change unfriendly.By come the elastic part of compressed mixed pipe by means of a kind of direct loading of pressure medium, this allows to realize a kind of manipulation of seldom inertia, and the device of wherein attaching troops to a unit can be saved ground, space and install.Substantially the mechanical oscillation of mixing tube vibration have been avoided when operation, may causing in this external this manipulation.
According to a kind of favourable improvement project, be in the port of export position of mixing tube, to clamp basically in by method of the present invention.In this clamping, keep air to guarantee that also weft yarn is that middle heart is arranged in the mixing tube substantially even without applying.Be used for wefting insertion if therefore weft yarn is unclamped, that just provides favourable prerequisite for weft position compatibly enters into shed open.
In order further to be optimized, in by method of the present invention, stipulate in an advantageous manner: the flexible part that is designed to of mixing tube so is out of shape to degree, on the direction of pointing to its longitudinal center's axis by means of pressure medium up to weft yarn is clamped at longitudinal center axis place.For example then be provided with two opposed Strok mechanisms in diameter ground in by the described jet loom of DE 32 00 638 A1 known, they can be anisotropically and just the compression of irregular deformation ground is described is designed to flexible and flexible part, and in the method for described type be accurate center symmetrically, compress equably.Weft yarn is clamped exactly and is remained on the central axis of mixing tube.Therefore clamping device forms a kind of center locking device to a certain extent, and this makes the weft yarn center aim at and therefore create the best prerequisite of wefting insertion to the shed open symmetrically.
According to the inventive method original with regard to inertia very little manipulation can also do further improvement as follows: in order to accelerate cancellation and to clamp and unclamping weft yarn, the flexible part of mixing tube controllably is under the negative pressure according to another kind of design from the outside.
Test showed already, when controlledly cancelling clamping action and with the wefting insertion air weft yarn being loaded simultaneously, in order again another weft yarn to be incorporated in the shed open, make described elasticity part enough releases apace inadequately of mixing tube, although described main burner owing to wefting insertion flow into the release that wefting insertion air in this part is supported this part.This may cause following situation under the disadvantageous situation: weft yarn also contacts the inwall of flexible part during at wefting insertion, and stays the abrasion vestige on this.Function and the service life that may therefore reduce clamping device if things go on like this.Because effect has negative pressure when cancellation clamps, so also avoided these possible shortcomings reliably.
Turned out to be already advantageously: by means of being used for realizing clamping for flexible part, and unclamp by means of the compressed air of negative pressure for the time less than-50.0 millibars less than the compressed air control mixing tube in 2.0 whens crust in overvoltage.
As described in, the described clamping at the position of mixing tube central longitudinal axis and outlet end then can enter the precondition that provides best in the shed open suitably for making weft yarn.But, can to the transit time of the weak point between the shed open, weft yarn be maintained as before provisionally by the maintenance air that vertically becomes a mandarin in clamping and release and wefting insertion for any undesirable displacement of cancellation weft yarn before entering shed open at weft yarn, in addition in order to reach the stretching of its necessity.Herein according to a kind of favourable design regulation of method of the present invention: just when a certain weft yarn be subjected to style restrictedly should be and wefting insertion as next weft yarn, its just maintained with the maintenance air when described clamping is opened before it enters shed open so.
Can stipulate as follows specifically to this: make weft yarn just be close to the weft yarn that advances into earlier and arrive and catch side and between before the next weft yarn wefting insertion pressure pulse being triggered, maintain with the maintenance air at one.
Has maximum meaning inevitably when the multicolor weft insertion by this design of the inventive method.That is to say can have long waiting time to a certain weft yarn for this reason, if this pattern has requirement.In whole waiting time, therefore only just maintain weft yarn by clamping.Do not need to keep air at this moment, and therefore eliminated the adverse effect that keeps air to cause owing to its sex change yet for weft yarn.Have only when weft yarn before had been close to wefting insertion and the related weft yarn that maintains will wefting insertion, so just in short-term with keeping air that described weft yarn is maintained, so that make it enter state best concerning its wefting insertion, and enter a kind of favorably situated position in the mixing tube.
Therefore maintain weft yarn with the clamping force of a qualification according to method of the present invention,, and still maintain position best concerning later wefting insertion as far as possible in main burner so that it can not skidded off.Utilization can not or can not be weaved by woven without difficulty yarn variety with jet loom, especially air-jet loom before can using those by method of the present invention, even is used for high-quality fabric.The elastomeric yarn that telextra and twisting are for example arranged that belongs to this yarn, they can with the method according to this invention particularly in air-jet loom relatively no problem ground process.
If introduce the weft yarn of different colours,, so just can particularly advantageously adopt the method so that can weave out certain style.A major advantage of the present invention is: corresponding to pattern repeat, when main burner a plurality of, that generally all dispose for every kind of color, carry out the clamping of weft yarn according to style.Clamp weft yarn and maintain this moment in whole " waiting the wefting insertion time ", before it wants wefting insertion immediately.
By means of the maintenance in short-term that keeps air is a kind of additional prioritization scheme, because provide the good premise condition for suitable the entering of weft position anyway when the clamping of a kind of central authorities symmetry.But show that keeping a kind of constant yarn tension is an important criterion for the high-quality fabric, and especially well can be by realizing by the maintenance that keeps air.Weft yarn obtains required yarn tension and the optimum position in mixing tube at this moment.Owing to keep the action time of air just shorter in the method according to the invention, wherein have only when wanting immediately wefting insertion just need keep air, therefore just avoided owing to keeping air to make weft yarn produce disadvantageous sex change.
Task of the present invention is also with a kind of jet loom, solve by the loom of each described method in the claim 1 to 7 in particular for implementing, this loom has at least one main burner, this main burner includes an injector, and this injector has a compressed air joint and a mixing tube that is connected on the injector; This loom also has a clamping device that is arranged in the mixing tube, and this clamping device constitutes by a part that is designed to flexibility of mixing tube, and is used for a weft yarn that is positioned in the mixing tube is clamped in the mixing tube inwall; This loom also has a device that flexible part so loads by pressure medium that is designed to that is used for mixing tube: make described part clamp ground compression weft yarn when loading under by the situation of pressure medium in certain pressure P, and it is back in its home position.
As in conjunction with as described in method narrates, a kind of few inertia, compact and vibrationless substantially function that a kind of jet loom of such structural shape can be realized.This so spy are suitable for making the woven designs with different colours, and wherein many main burners all must be assembled with the layout of compactness together with the mixing tube of being attached troops to a unit.By hydraulic pressure or Pneumatic pressure medium, the preferably manipulation carried out of compressed air and the control operation that in addition also causes a kind of few vibration, even so each mixing tube accurate position that with respect to shed open, when long-time running, also can keep its best basically.
The center locking device of arm strength device (Muskel) form of preferably a kind of pneumatic or hydraulic pressure of clamping device.Preferred herein a kind of form of implementation, the arm strength device of wherein pneumatic or hydraulic pressure clamp weft yarn at the position of the central longitudinal axis of mixing tube basically.
This pressure or pneumatic arm strength device are realized as follows: a part of mixing tube is made by a kind of highly elastic material of flexibility.Described pressure medium, mainly be compressed air equably from the outside and central authorities act on symmetrically on the arm strength device, thereby can be implemented in clamping in the mixing tube central longitudinal axis position with the security of maximum possible.
Described arm strength device pneumatic or hydraulic pressure is arranged between one first and one the second mixing tube portion section, and these two portion's sections are closely coupled together, and wherein pressure medium acts on this arm strength device at one in the chamber of arm strength device.
The position of the best of weft yarn compatibly maintains as follows and reaches: the nozzle opening place that described clamping device is arranged in mixing tube according to a kind of improvement project.
The control of the arm strength device of pneumatic or hydraulic pressure can be carried out like this: should make the pressure pulse that is used for wefting insertion and triggers in the injector of main burner that the clamping action of clamping device is unclamped.
Therefore this design is favourable, because must will cancel described clamping before weft yarn is incorporated into shed open anyway.
Can also advantageously stipulate, chamber is connected with a negative pressure source, be used to make the arm strength device fast pressure relief of pneumatic or hydraulic pressure.
Therefore cancelling that clamping action has more than is easily to carry out as follows: finish to affact from the outside the effect of a kind of overvoltage on the arm strength device, but blast compressed air by arm strength device inside simultaneously, and can make the chamber that surrounds the arm strength device be subjected to the effect of negative pressure.
Required for this reason connection can realize by solenoid directional control valve, and have a vavuum pump can be used as negative pressure source.
A kind of favourable improvement project also is: be provided with a control device by jet loom of the present invention, with compressed air when a compressed air source is defeated by injector and the described clamping device that is provided with a pressure sensor, this control device causes a kind of acting in conjunction of coordination, and wherein compressed air is used as the pressure medium of clamping device.
A kind of like this coupling connection of the manipulation of main burner and clamping device has caused a kind of compact conformation, has used economic control device.
Advantageously stipulate in addition: clamping device can be close to and remain on before the wefting insertion on its position of opening, and just just can will keep air to be incorporated in the mixing tube by injector when clamping device is opened.
In this project organization, weft yarn is maintained much bigger " waiting time " in its section by clamping by means of arm strength device pneumatic or hydraulic pressure.Keep by means of the maintenance air before just being close to its wefting insertion, make the position of weft yarn and state be ready to wefting insertion best in shed open like this.Compare so greatly reduce owing to keeping making yarn produce the danger of disadvantageous sex change with background technology.
Carry out wefting insertion in shed open after, on the wefting insertion direction, weft yarn is disconnected by means of a cutter sweep.This carried out in such moment: the wherein said pressure pulse that injector triggered by main burner and for example this degree ground reduces, and makes describedly to preponderate at the pressure in the chamber of arm strength device, and on clamped position weft yarn is clamped again.Only the pressure differential between pressure pulse by being chosen in injector and the pressure in the chamber of arm strength device is controlled the opening and closing of clamping device with the performance of the elastic hose section that forms the arm strength device relevantly.
System-this system that a kind of so pressure balanced pressure is in other words coordinated is at the pressure of the pressure apparatus that is used to maintain weft yarn by the maximum pressure of the pressure of the injector output of main burner and the described arm strength device of compression-for changing special cycle rapidly, the weave cycle here just, be particularly suitable for air-jet loom at a high speed.
Can also improve in an advantageous manner with a kind of like this control device of structure by jet loom of the present invention at last, making clamping device can be close to before finishing the wefting insertion of weft yarn so closes to degree: can brake when making this state of weft yarn at its wefting insertion, thereby make its slip over clamping device with braking.This can by on purpose be controlled at pressure pulse, pressure differential between the shape of pressure pulse and the pressure in the chamber of clamping device or pressure change in other words reaches.Clamping device then plays the effect of brake in a period of time that is close to before finishing wefting insertion.
Utilize this brake apparatus, can be according to definite described pressure extent, make by the kinetic energy that accelerates to a high-speed weft yarn when the wefting insertion and realize a kind of guiding of protecting yarn.Being often referred in the weft yarn end to the motion that stops block (rebounding) of pre-winding device of weft yarn just avoided substantially in this way.Can resist this of weft yarn with such clamping device towards rebound (the fluffing out) that stops element optimized aspect the braking effect, as to be used as Yarn braking, or rather, can not appear at the waste material length of such higher switching nozzle exit pressure common in the background technology, use draw jet and/or increase.Clamping effect when braking is gradually controlled by pressure differential herein, thereby makes weft yarn slip over clamping device submissively, and itself is not modified.Showed already, the pressure in the chamber in other words pressure change and the pressure pulse coordination between the shape of pressure pulse in other words can realize so subtly, thereby braking effect can be set up according to the kind and the quality optimization ground of weft yarn.This effect can not make the fabric quality variation.The reverse be true has obviously been improved because the quality of fabric is compared with the wefting insertion of a kind of brakeless of weft yarn.
Also can trigger a prepulsing from injector, the releaser who opens clamping device is surveyed and is used as in this pulse by pressure sensor.The selection of the amplitude of this prepulsing should make it than the value in the big regulation of pressure in the chamber of arm strength device, and wherein the duration of this prepulsing is equivalent to the duration of wefting insertion at least.
Independently invent suggestion according to another kind, for a kind of method that solved term of reference that beginning mentions, be used for entering into one at a weft yarn and this weft yarn maintained by warp thread before in the formed shed open at the mixing tube of the main burner of jet loom, especially an air-jet loom, wherein this weft yarn is clamped towards the inwall of mixing tube with the compressed air that the side blasts.
Be with first kind of difference according to the scheme of method: the compressed air of effect no longer a flexibility by mixing tube realize clamping with flexible segmentation, but weft yarn is directly clamped towards the inwall of mixing tube.
Thisly can realize on a kind of structure simple especially method by the solution of the present invention.By setting up compressed-air actuated pressure and the amount that the side flows into, also can set up the confining force of desirable regulation exactly here.
Can be especially well in this method in the position of the port of export of mixing tube, clamp basically.Only that is to say and just compressed air to be incorporated in the mixing tube inside by the perforate of side in the mixing tube.This means and reduce the yarn refuse and guaranteed: in real fabric, have only unmodified yarn.Such clamping can realize with opposite side by a kind of special clamping device even outside mixing tube.
Certainly by also making weft yarn open and be displaced sideways on the inwall that from the side weft yarn is clamped in mixing tube from longitudinal center's upper deflecting of mixing tube.Press in a kind of favourable scheme of the inventive method this, the compressed air that makes at least a portion weft yarn utilize the side to blow into clamps towards the inwall of mixing tube, this scheme just is: weft yarn is close to did not have compressed air input ground to remain in the mixing tube with the maintenance air before it enters into shed open, perhaps described according to claim 1 to 3, remain in the central longitudinal axis scope of mixing tube with clamping.
Therefore be close to the clamping of cancellation side before the weft yarn wefting insertion is in the shed open, and by having realized making weft yarn be back to the longitudinal center place of mixing tube with maintenance that keeps air or centrosymmetric clamping, thereby, the weft yarn wefting insertion guaranteed best precondition for being entered into shed open.This is a particular importance, if make the weft yarn wefting insertion of different colours so that can weave certain style.Each weft yarn is then clamped by ground according to style.They maintained up to being close to before wefting insertion in " waiting time " of its whole wait wefting insertion all clampedly.Only after the clamping of unclamping weft yarn, if related weft yarn is subjected to the restriction of style to carry out wefting insertion as back to back weft yarn, that just makes this weft yarn clamp or maintains with the maintenance air.Need not load weft yarn in the time of remainder, in waiting time just, and be from the side with its clamping in simple mode on the structure with the maintenance air.Therefore saved the maintenance air or fully need not, nor can produce the prejudicial like this effect of sex change.
Specifically, stipulated according to the favourable scheme of another kind: is exactly to be close to the weft yarn of wefting insertion formerly at one to arrive and catch the latitude side and trigger time interval between the wefting insertion of described back to back weft yarn with weft yarn by keeping air or remaining on time length in longitudinal center's axis scope of mixing tube by clamping.
A kind of corresponding jet loom, be particularly useful for implementing described second kind of loom and be provided with at least one main burner by method of the present invention, this main burner includes an injector, and this injector has a compressed air joint and a mixing tube that is connected on this injector; Also be provided with one and be arranged in the clamping device that can be switched on or switched off in the mixing tube, by this clamping device weft yarn is clamped towards the inwall of mixing tube with the compressed air that the side is blown into, wherein when clamping device disconnects, arrive the pressure pulse of catching the latitude side and being used to introduce back to back weft yarn by means of injector at a weft yarn that is close to wefting insertion formerly and will keep air to be incorporated in the mixing tube within the duration between discharging, and compressed air is introduced towards the inwall of mixing tube from the side, be used for that weft yarn is clamped in one and wait the position.
Clear and definite in the explanation of the advantage of this jet loom by the inventive method.Self-evident, clamping device can be arranged in mixing tube the end or even be arranged in outside this mixing tube, if structure situation is had requirement.
Can so advantageously control injector by a controlled valve herein, make to keep air to carry out being blown into before the wefting insertion by the adjacent weft yarn that and then is provided with being used for wefting insertion separately.
This scheme is used for saving the maintenance air and avoids owing to keep air that weft yarn is caused disadvantageous sex change.Just will keep air to be incorporated in the mixing tube so as far as possible in short time, as must wanting with the weft yarn location institute that is suitable for wefting insertion for the yarn tension of the best.
At last can also be in an advantageous manner be provided with the perforate of the compressed air joint of a side and and the opposed layout of this joint on by jet loom of the present invention on the wall at mixing tube, its structure should make weft yarn when compressed air blasts with its end bending be pressed in the perforate, and by means of compressed air remain on with clamping of perforate in mixing tube inside around arris on.
If correctly design, just can make so on the one hand that weft yarn is very accurate to remain on the edge of perforate suitably with state, but not change weft yarn character or make it to produce the danger of damage in other mode in the perforate that is positioned at the opposite that mixes on the tube wall.
Other advantage of the present invention, characteristics and application possibility are all described in detail at a kind of embodiment of following basis based on accompanying drawing.Accompanying drawing is depicted as:
The schematic diagram of a kind of main burner of Fig. 1, this main burner has injector and mixing tube, integrated clamping device is used to clamp weft yarn in mixing tube, has a control device, and this control device is coordinated the clamping of weft yarn and the triggering of pressure pulse mutually by injector;
Fig. 2 has comprised a kind of embodiment of clamping device, the form of this device be a kind of pneumatic/the arm strength device of hydraulic pressure on the enable possition, that is to say at one not make by the arm strength device on the position that weft yarn clamps;
Fig. 3 represented that an arm strength device that is integrated in the pneumatic/hydraulic pressure in the mixing tube is positioned at that weft yarn is cut off after its wefting insertion and the position that maintains by clamping device on;
Fig. 4 has comprised a kind of details by jet loom of the present invention, and this loom has the modified control device of the arm strength device of pneumatic/hydraulic pressure, and this arm strength device is shown on its clamping position;
Fig. 5 when clamping device is opened corresponding to the diagrammatic sketch of Fig. 4.
Fig. 1 has represented the principles of construction of a main burner, it has injector 1 and mixing tube 2 and is integrated in clamping device 6 in the mixing tube, also represent being connected of clamping device 6 and a control device 13, can be implemented in the connection between the control device of injector 1 and control clamping device 6 by this control device 13.Put a weft yarn 9 at the main burner lining with injector 1 and mixing tube 2, it extends along longitudinal center's axis of mixing tube 2 basically.At 2 li of mixing tubes integrated clamping device 6 between one first mixing tube portion section 4 and one second mixing tube portion section 5, this device is illustrated in Fig. 2 and 3 enlargedly.From the exit of the second mixing tube portion section 5 cutter sweep 18 is arranged in principle at weft yarn 9.Cutter sweep 18 is between the shed open 20 shown in second mixation tube section 5 and the vertical view, and weft yarn should arrive in this shed open by wefting insertion.Shed open 20 is made of many warp thread 10.
Being connected in has a pressure sensor 7 on the clamping device 6, it is connected with control device 13 by a holding wire 11.Holding wire 14 by other comes control valve 8 by control device 13, these valves itself are connected with a compressed air source 19, and can carry out corresponding air input to the compressed air hose 15 of clamping device 6 or the compressed air hose 17 of another root to one compressed air joint 3 by one, this compressed air joint itself is connected on the injector 1 of main burner, and pass through this joint and supply with compressed air for injector 1, be used for input and keep air and introduce weft yarn 9.By holding wire 14 and 11 control closing of described clamping device 6 and open and be used to introduce weft yarn 9 pressure pulse triggering and be blown into the beginning that keeps air and finish between temporal relation.
Fig. 2 has represented by the amplification view of clamping device shown in Figure 16 under opening.So-called opening is meant the state when clamping device 6 is not clamped weft yarn 9, that is to say weft yarn 9 or is used for wefting insertion or unclamps in the time of wefting insertion.If but be subjected to style to limit this weft yarn also should wefting insertion the time, so just do not blast the maintenance air, also make weft yarn clamp (see figure 3) according to the present invention.
Weft yarn 9 is by first mixation tube section 4, by clamping device 6 and by the central longitudinal axis extension of second mixation tube section 5 along mixing tube.Clamping device 6 can be said so one is connected with each other airtightly by mixation tube section 4 and 5 mixing tube in two.In other words, the design of this clamping device should guarantee to be designed to the flexible hose section neatly in the wall flexibility that clamps in the position mixing tube 2, thereby making this wall load by means of a kind of pressure medium-entered into by arrow on the direction of 6 li of clamping devices illustrates-time, with the pressure P compression, perhaps when release, be back to again in its home position.In the mixing tube pressure inside is P
mThe flexible wall of clamping device is designed to arm strength device 16 pneumatic or hydraulic pressure.Around the arm strength device 16 of this pneumatic or hydraulic pressure is chamber 12, is that the pressure medium of P is incorporated into 6 li of clamping devices by compressed air hose 15 (Fig. 1) with pressure in this chamber.Pressure medium is at corresponding raising pressure (P＞P
m) time make pneumatic or hydraulic pressure the flexible wall of arm strength device towards the distortion of the central longitudinal axis of mixing tube, thereby produce distortion towards weft yarn 9.Be connected with pressure sensor 7 on chamber 12, it is connected with control device 13 (see figure 1)s by holding wire 11.By means of pressure sensor 7, through valve 8 pressure medium is imported controllably from pressure source 19 by a corresponding regulating loop; Perhaps interrupt the input of pressure medium,, depend on that time ground triggers a pressure pulse from the injector 1 of main burner, is used for weft yarn 9 is incorporated into 20 li of shed opens so that obtain each state of clamping device 6, the clamping of weft yarn 9 just or the release of this weft yarn.Realize importing through compressed air line 17 to the compressed air of injector 1.
Fig. 3 has represented the state of clamping device 6, this moment pressure medium in the pressure P of 12 li of chambers greater than the interior pressure P in the mixing tube
mSo the distortion of degree like this takes place in the flexible wall that makes arm strength device 16 pneumatic or hydraulic pressure towards the central longitudinal axis of mixing tube 2, weft yarn 9 is clamped reliably in central authorities, thereby its yarn tension maintain in the way you want in the position of first mixation tube section 4.Abut on the inwall of second mixation tube section 5 described weft yarn Duan Zewu tension force that cut off by means of unshowned cutter sweep 18 among Fig. 3, that be positioned at 5 li of second mixation tube sections.Since clamping device 6 together with arm strength device 16 closely be positioned at cut point (Schnittstelle) locate, just at the front end place of the wefting insertion direction of weft yarn, and owing to avoided the maintenance air to the full extent with clamping device, that is to say near clamping the sex change that does not occur yarn in the position basically, so the fabric quality height, and refuse is less.Only inweave being located substantially on first 4 li of the mixing tube portion sections and having the weft yarn of the yarn stress of a substantial constant of part after in the fabric of making, thereby just avoided otherwise causing the yarn stress of the variation of difference in quality in the fabric.
Being tightly connected between first mixation tube section 4 and second mixation tube section 5 is connected with an O-ring seals 22 by its form annular lip 21 that is locking nut and reaches, this nut in axial direction tightens on the shell of clamping device 6, and therefore this annular lip 21 compresses seal 22 and therefore realize its sealing function by tightening.
The improved control device of in Figure 4 and 5, having represented a kind of jet loom by the present invention design.Those were compared with former described form of implementation and immovable parts are represented with identical Reference numeral before also resembling.
A solenoid directional control valve 23 is used to handle the arm strength device 16 of pneumatic/hydraulic pressure, and this valve is controlled by control device 13, and the chamber 12 of clamping device 6 is connected with a mistake potential source 25.Thereby make the arm strength device 16 of pneumatic/hydraulic pressure, just the flexible elastomeric part that is designed to of mixing tube clamped symmetrically and equably towards longitudinal center's axis direction compression of mixing tube 2 and with weft yarn 9.
In order to cancel clamping, make the commutation of control solenoid directional control valve 23 and therefore with chamber 12, pressure piping 26 be connected skirt 27 and be connected with a negative pressure source 28.Therefore make the arm strength device 16 rapid releases of pneumatic/hydraulic pressure.The acceleration of this dispose procedure has caused: the weft yarn 9 of motion no longer can be along dragging on the flexibility of arm strength device 16 and high elasticity wall with that immediately.Even thereby when long running time, also avoided the damage of arm strength device 16.
Claims (26)
1. be used for the method that this weft yarn maintained before with a weft yarn wefting insertion to a rib mouth that constitutes by warp thread in the mixing tube of the main burner of jet loom, especially an air-jet loom, wherein by making the part compression of a flexible construction of mixing tube by means of a kind of loading of pressure medium from the outside, and weft yarn is maintained with clamping.
2. by the described method of claim 1, wherein clamp at the position of the port of export of mixing tube basically.
3. by claim 1 or 2 described methods, wherein make described mixing tube flexible construction part towards on the direction of its longitudinal center's axis by means of the pressure medium distortion so far: weft yarn is clamped in the central longitudinal axis position.
4. by each described method in the claim 1 to 3, wherein, the flexible part of described mixing tube is under the negative pressure controllably from the outside in order to cancel post to the clamping and releasing of weft yarn.
5. by the described method of claim 4, wherein be used for realizing clamping for the flexible part of controlling mixing tube less than the compressed air of 2.0 crust, and discharge by means of the compressed air of negative pressure less than-50.0 millibars by means of pressure.
6. by the described method of one of aforesaid right requirement, when especially adopting the wefting insertion of polychrome, a wherein a certain weft yarn has only when restrictedly should be introduced into as back to back weft yarn by style, and it just maintained with the maintenance air when clamping is opened before its wefting insertion enters into shed open.
7. by the described method of claim 6, wherein weft yarn just arrives at a previous weft yarn that has entered that is close to and catches latitude side and triggering and be used to make between the pressure pulse of described back to back weft yarn wefting insertion and maintain with the maintenance air.
Jet loom, be particularly useful for implementing loom by described method one of in the claim 1 to 7, this loom has a main burner, this main burner includes an injector (1), and this injector has a compressed air joint (3) and a mixing tube (2) that is connected in injector (1); Also have a clamping device (6) that is arranged in mixing tube (2) lining, this clamping device is made of the part of a flexible construction of mixing tube (2), and is used for a weft yarn that is positioned at mixing tube is clamped in the inwall of mixing tube; And also having one to be used for by the device of pressure medium to the part loading of the flexible construction of mixing tube, load mode is to compress described part when loading by the pressure medium under some pressure P situations, and weft yarn is clamped; And when release, return back to its original position again.
9. by the described jet loom of claim 8, wherein clamping device (6) is a kind of center locking device, and its form is a kind of arm strength device pneumatic or hydraulic pressure.
10. by the described jet loom of claim 9, arm strength device wherein pneumatic or hydraulic pressure clamps weft yarn basically in the central longitudinal axis scope of mixing tube (2).
11. by claim 8 or 9 described jet looms, arm strength device wherein pneumatic or hydraulic pressure is arranged between one first mixation tube section (4) and one second pipeline section (5), and make this two pipeline sections (4,5) be sealedly connected, wherein pressure medium loads chamber (a 12) lining that surrounds it the arm strength device.
12. by each described jet loom in the claim 8 to 11, wherein clamping device (6) is arranged in the outlet opening place of mixing tube (2).
13. by each described jet loom in the claim 8 to 12, its structure should make and be used in the injector of main burner (1) lining weft yarn (9) is carried out wefting insertion and the pressure pulse that triggers can make the clamping and release of clamping device (6).
14., wherein, chamber (12) is connected with a negative pressure source (28) for to make arm strength device fast pressure relief pneumatic or hydraulic pressure by each described jet loom in the claim 11 to 13.
15., wherein realize connecting by a solenoid directional control valve (23) by the described jet loom of claim 14.
16. by claim 14 or 15 described jet looms, this loom has a vavuum pump as negative pressure source (28).
17. by each described jet loom in the claim 8 to 16, this loom has a control device (13), be used for compressed air acting in conjunction in phase when a compressed air source (19) inputs to injector (1) and be input to the clamping device (6) that is provided with a pressure sensor (7), wherein compressed air is as the pressure medium of clamping device (6) usefulness.
18. by the described jet loom of claim 17, this loom has a kind of control device (13) of such structure, this clamping device (6) can be close to before weft yarn (9) wefting insertion remain on its enable possition, and just when clamping device is opened, can will keep air to be incorporated into mixing tube (2) lining by injector (1).
19. by claim 17 or 18 described jet looms, this loom has a kind of control device (13) of such structure, this clamping device (6) just before finishing, weft yarn (9) wefting insertion is so closed to degree, weft yarn (9) can be braked when this state of its wefting insertion, make this weft yarn can slip over described clamping device (6) with braking.
20. be used for making a weft yarn in the method that maintained before its wefting insertion to one is by the shed open that warp thread constituted in the mixing tube of the main burner of jet loom, especially an air-jet loom, wherein the compressed air that is blown into the side makes this weft yarn clamp towards the inwall of mixing tube.
21. by the described method of claim 20, wherein said clamping is carried out in the position of the port of export of mixing tube basically.
22. by claim 20 or 21 described methods, at least a portion weft yarn is clamped towards the inner chamber of mixing tube with the compressed air that the side blows into, but just before the weft yarn wefting insertion is entered into shed open, make it to remain in the mixing tube and the non-compressed air input with the maintenance air, perhaps according to the described clamping of claim 1 to 3 remain in the central longitudinal axis position of mixing tube.
23. by the described method of claim 22, wherein weft yarn is exactly to be close to the weft yarn that advances into earlier at one to arrive when catching the latitude side and trigger time interval between the wefting insertion of the described weft yarn of following by keeping air or maintaining in the duration in the longitudinal center axis position of mixing tube by clamping.
24. in particular for implementing jet loom by each described method in the claim 20 to 23, this loom has a main burner, this main burner includes an injector, and this injector has a compressed air joint and a mixing tube that is connected in this injector; Have one and be arranged in the clamping device that can be switched on or switched off in the mixing tube, the compressed air that is blown into the side by this device makes weft yarn clamp towards the mixing tube inwall, wherein when clamping device disconnects, arrive at a weft yarn that had been close to previous wefting insertion and catch latitude side and triggering and be used to make in duration between the pressure pulse of the described weft yarn wefting insertion that is close to and will keep air to be incorporated in the mixing tube by means of injector, and when clamping device is connected, compressed air is introduced towards the direction of mixing tube inwall laterally, be used for waiting clamping weft yarn on the position at one.
25. by the described jet loom of claim 24, wherein said injector can so be controlled by a controlled valve, makes the weft yarn that keeps air just and then to be provided with being used for wefting insertion separately carry out being blown into before the wefting insertion.
26. by claim 24 or 25 described jet looms, this loom have the compressed air joint of a side and one be positioned at this joint opposite, in the perforate that mixes on the tube wall, its structure should make weft yarn when compressed air is blown into its end bending be pressed in this perforate, and by means of compressed air make this weft yarn remain on with clamping of this perforate in the inside of mixing tube around arris on.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10243404.2 | 2002-09-18 | ||
| DE10243404 | 2002-09-18 | ||
| DE10244694.6 | 2002-09-24 | ||
| DE10256830.8 | 2002-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1701140A true CN1701140A (en) | 2005-11-23 |
Family
ID=32009842
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03825247 Pending CN1701140A (en) | 2002-09-18 | 2003-08-28 | Method for holding a weft yarn, and a jet weaving machine, particularly serving to carry out this method |
| CN 03825253 Pending CN1701141A (en) | 2002-09-18 | 2003-08-28 | Method for holding a weft yarn, jet weaving machine comprising a clamping device for the weft yarn, particularly serving to carry out this method, and cartridge provided in the form of an exchangeable |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03825253 Pending CN1701141A (en) | 2002-09-18 | 2003-08-28 | Method for holding a weft yarn, jet weaving machine comprising a clamping device for the weft yarn, particularly serving to carry out this method, and cartridge provided in the form of an exchangeable |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN1701140A (en) |
| DE (1) | DE10244694B4 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757807A (en) * | 2013-12-31 | 2014-04-30 | 吴江市豪辉布业有限公司 | Yarn guide |
| CN104032455A (en) * | 2014-06-23 | 2014-09-10 | 湖州石淙印染有限公司 | Electromagnetic weft catching and tightening structure |
| CN104047095A (en) * | 2013-03-15 | 2014-09-17 | 株式会社丰田自动织机 | Main nozzle of an air jet loom |
| CN105714455A (en) * | 2016-04-15 | 2016-06-29 | 苏州市丹纺纺织研发有限公司 | Spring-loaded weft capture device |
| CN111676572A (en) * | 2020-06-18 | 2020-09-18 | 山东南山智尚科技股份有限公司 | Consumption reducing method for rapier loom |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10256830B3 (en) * | 2002-12-04 | 2004-08-26 | Lindauer Dornier Gesellschaft Mbh | To hold a weft yarn at the mixing tube before insertion through the shed between the warps, in an air jet loom, blades clamp the yarn between them with a spring reassertion for release |
| DE10256876A1 (en) * | 2002-12-04 | 2004-07-22 | Lindauer Dornier Gmbh | To hold a weft yarn at the mixing tube before insertion through the shed between the warps, in an air jet loom, blades clamp the yarn between them with a spring reassertion for release |
| DE10256829B3 (en) * | 2002-12-04 | 2004-09-16 | Lindauer Dornier Gesellschaft Mbh | To hold a weft yarn at the mixing tube before insertion through the shed between the warps, in an air jet loom, blades clamp the yarn between them with a spring reassertion for release |
| DE102004036996B3 (en) * | 2004-07-30 | 2005-12-01 | Lindauer Dornier Gmbh | Düsenwebmaschine, in particular air jet loom, with a clamping device in the mixing tube |
| DE102006025968B3 (en) * | 2006-06-02 | 2007-11-29 | Lindauer Dornier Gmbh | Reliable clamping of weft thread in jet loom, especially air jet loom, by use of movable clamping member with clamping force magnetically reinforced in thread clamping position |
| JP5229351B2 (en) * | 2011-05-06 | 2013-07-03 | 株式会社豊田自動織機 | Weft storage device in loom |
| JP5273205B2 (en) * | 2011-05-27 | 2013-08-28 | 株式会社豊田自動織機 | Weft storage device in loom |
| CN102251337A (en) * | 2011-07-25 | 2011-11-23 | 青岛铠硕纺机有限公司 | Weft gripper |
| CN110670208B (en) * | 2019-09-04 | 2022-03-25 | 西安工程大学 | Electromagnetic weft insertion weft gripper, opener and weft gripping method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH649103A5 (en) * | 1981-01-13 | 1985-04-30 | Rueti Te Strake Bv | PROTECTIVE WEAVING MACHINE. |
| JP4057124B2 (en) * | 1998-01-20 | 2008-03-05 | 株式会社豊田自動織機 | Weft thread gripping device in jet loom |
| BE1012494A3 (en) * | 1999-03-02 | 2000-11-07 | Picanol Nv | Device for the insertion of a weft thread. |
-
2002
- 2002-09-24 DE DE10244694A patent/DE10244694B4/en not_active Expired - Fee Related
-
2003
- 2003-08-28 CN CN 03825247 patent/CN1701140A/en active Pending
- 2003-08-28 CN CN 03825253 patent/CN1701141A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047095A (en) * | 2013-03-15 | 2014-09-17 | 株式会社丰田自动织机 | Main nozzle of an air jet loom |
| CN103757807A (en) * | 2013-12-31 | 2014-04-30 | 吴江市豪辉布业有限公司 | Yarn guide |
| CN104032455A (en) * | 2014-06-23 | 2014-09-10 | 湖州石淙印染有限公司 | Electromagnetic weft catching and tightening structure |
| CN105714455A (en) * | 2016-04-15 | 2016-06-29 | 苏州市丹纺纺织研发有限公司 | Spring-loaded weft capture device |
| CN111676572A (en) * | 2020-06-18 | 2020-09-18 | 山东南山智尚科技股份有限公司 | Consumption reducing method for rapier loom |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1701141A (en) | 2005-11-23 |
| DE10244694A1 (en) | 2004-04-15 |
| DE10244694B4 (en) | 2005-01-20 |
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