A kind of device of optimizing cross winding automatic device winding head unwinding yarn
Technical field
The present invention relates to a kind of device of unwinding yarn of optimization cross winding automatic device winding head of claim 1 preamble.
Background technology
Through winding head, the cop with little yarn amount that feeding bobbin particularly forms on ring spinner (Spinnkopse or cop) is again around (umspulen) Cheng Dajuan cross winding bobbin.Walking around again in the journey, detecting the yarn defect of yarn, removing the yarn defect and change by the approximate uniform joint of yarn.Pull out again walking around in journey of carrying out by forming so-called ballooning of yarn through the head of cop at yarn, yarn bears pulling force, and its yarn pulling force finally can limit the withdrawal speed of yarn and limit the winding speed of cross winding automatic device thus.That is to say, in winding process, if do not take the actv. countrmeasure, last three/for the moment at winding process particularly, the yarn pulling force may be increased to several times of initial yarn pulling force, and this can obviously improve the danger that yarn is broken.Because yarn is broken not only and can the quality of cross winding bobbin be had a negative impact, but also can reduce the efficient of relevant loom, recently, people attempt to improve this device, improve by this device and walk around the unwinding characteristic of cop in the journey again and improve yarn take-off speed.
In order to improve yarn take-off speed, for example advise again around the time unwinding cheese is rotated.For example described a kind of winding head of accurate cross winding machine in CH-PS 542781, it has the bobbin of the rotating support that is used for feeding bobbin and accepts axle.Bobbin is accepted axle and is connected with driving drum by drive belt, and this driving drum is bearing in loom and vertically constantly also on purpose is connected with axle drive shaft by magnetic clutch on the axle drive shaft of rotation.When accepting shaft drying winding bobbin diameter arrive predetermined size under the cross winding correlation circumstance and when being in high yarn take-off speed thus, corresponding device thereof makes the bobbin of feeding bobbin accept axle and rotates and simplified yarn unclamping from the unwinding cheese thus in the opposite direction of unwinding yarn.
DE 38 43 928 A1 have also described a kind of work winding head of cross winding automatic device.In this known winding head, the bobbin that is used for feeding bobbin is accepted axle and is being walked around journey again by pneumatic rotation.Return bobbin and accept axle and disposed brake equipment, disconnect in case be used to rotate the pressure air of driving, it starts automatically.By above-mentioned device; though can reduce walking around the yarn pulling force that produces in the journey again and improving yarn take-off speed thus; but the shortcoming of bringing thus is, usually can occur for this device that the unwinding cheese yarn is uncontrollable to be unclamped and produce snarling thus.
When particularly this snarling is not noted being wound up on the cross winding bobbin, can cause the obvious decline of quality, cause whole relevant cross winding bobbin not use thus.Even snarling is found and by yarn clearer excision, snarling usually occurs and also can be at least the efficient of loom be had a negative impact.
Relevant with the cop top unwinding on the cross winding automatic device winding head is also to disclose mechanical feed carrier, so-called unwinding yarn accelerator.These unwinding yarn accelerators are arranged on the cop still at interval and make yarn unwinding from the cop become simple.
EP 0 684 203 A2 have described a kind of unwinding yarn accelerator, and it is fixed on the cop still and comprises the yarn guiding surface that is truncated cone shape with a plurality of interference ribs.Interference rib by known unwinding yarn accelerator disturbs and formed ballooning of yarn when the cop unwinding, and this unwinding characteristic to cop produces positive effect.
In addition, by this known mechanical feed carrier, can reduce walking around the yarn pulling force that forms in the journey again and correspondingly improving yarn take-off speed.Be unwound to the yarn pulling force that produces below 1/3rd at cop and limited the yarn take-off speed that should obtain, and its yarn pulling force is still very high, described yarn pulling force for example abuts to cop bobbin head by yarn and regulates.
DE 42 21 559 A1 disclose the feed carrier by the effect of unwinding yarn accelerator.This known feed carrier has the first tubular stopper, and along with the carrying out of cop unwinding, it descends so definitely, makes its body remain unchanged with a vertical section apart from the distance of incidental looping cone.That is, first stopper drops on the ballooning of yarn and expansion ballooning of yarn again around cop the time from above.Support second stopper on first stopper movably, this stopper has the guide eyelit that limits multilayer ballooning of yarn length.This second stopper at first descends with first stopper when the cop unwinding and is resisted against one at last independently on the stop part.
This known feed carrier always far is provided with on cop awl, makes ballooning of yarn be resisted against on the following rib of first stopper and mends yarn thus, makes yarn be similar to orthogonally unwinding from the cop.In addition, at the inner multilayer ballooning of yarn that forms of two stoppers.This known feed carrier can produce high relatively yarn tension and therefore exist again around the time damage the danger of yarn.
Summary of the invention
According to above-mentioned background technology, the objective of the invention is to by a kind of improved device, to optimize the unwinding yarn on the cross winding automatic device winding head, in whole unwinding process, can obviously reduce the yarn pulling force and can guarantee again to avoid yarn to damage in the journey walking around again.
The objective of the invention is to realize by device with claim 1 feature.
Other preferred implementation of the present invention is the theme of dependent claims.
Device of the present invention has a control apparatus that is used for vertical shifting supporting yarn introduction member, its yarn introduction member when unwinding yarn, forms ballooning of yarn on limit.When unwinding yarn, its yarn introduction member forms dead-beat single thread thread balloon (Einfach-Fadenballon) according to the reeling condition of corresponding unwinding cop.That is, continue to optimize the shape of ballooning of yarn during by unwinding yarn, make yarn not be with from the coiling awl of unwinding cheese with in whole winding process, not damaging and unclamp.Like this, reduce the tension force of unwinding yarn, guaranteed when the high-speed unwinding yarn, successfully to carry out unwinding yarn.
As described in claim 2, a device is set as reel regulates computer device or central control unit, to the different parameter of its input, these parameters when unwinding yarn and when the yarn introduction member vertical shifting by corresponding consideration.These parameters for example are the initial spacings of diameter, unwinding cop head and yarn introduction member in length, the yarn introduction member hole of yarn fineness, the unwinding cop of yarn.By adapting with corresponding situation respectively, it is constant substantially whole winding process to reduce the power and this power that produce when the yarn that unclamps from unwinding cheese.
What can also add or replace be, as described in claim 3, a sensing device is set, and it is detection line air ring and be connected with the device of analyzing the ballooning of yarn shape contactlessly.Analyze of the driving of the device of ballooning of yarn, to drive yarn introduction member according to its assessment generation yarn introduction member.The position of yarn introduction member is revised equally according to the method described above.Can also guarantee like this yarn from the unwinding cheese evenly, the unwinding of protection yarn, this is to obviously reducing unwinding yarn tension force and keeping its tension force to walk around whole that Cheng Jiben is constant can to produce positive role again.The sensing device of no touch work preferably is made of optical sensing means, its signal after handle in the device that connects, assessment and for example be used to control yarn introduction member through online.
Sensing device or be fixedly installed on the housing of winding head or as being provided with movably with the longitudinal central axis line parallel of unwinding cop as described in the claim 4.Particularly, can easily detect the small deviation of ballooning of yarn and ideal form also for example by the corresponding position that initiatively changes yarn introduction member of revising for the mobile support sensing device.
Preferred implementation as claimed in claim 5, its yarn introduction member have by control apparatus vertically determines the matrix and the floating part that move, this floating part floating support and have guide eyelit in matrix.The yarn of pulling out from cop is passed in the guide eyelit that floating part forms, and this guide eyelit has circular cross section (claim 6).The advantage of the floating part of floating support is, walks around in the journey whole again, and always along with the ballooning of yarn motion, this helps protecting yarn to floating part.Its floating part can have oval or polygonal guide eyelit, substitutes circular guide eyelit.The optimum shape of its guide eyelit depends on different parameters such as thread material, yarn fineness, withdrawal speed etc.
Replacement embodiment as claimed in claim 9, device of the present invention have the air ring device for limiting of vertical shifting supporting, walk around again in the journey it with respect to cop on location like this, promptly its machinery limits the radius of the ballooning of yarn of unwinding yarn from the cop.That is, because the shape of formation, particularly ballooning of yarn by parameter " average air ring radius " and " drift " change air ring, the maximum radius that can green phase should limit ballooning of yarn forms the single thread thread balloon by the air ring device for limiting.
As described in claim 10, the air ring device for limiting preferably is positioned like this, makes the inboard tangent of the ballooning of yarn that formed by the unwinding yarn and air ring device for limiting.That is, the component that ballooning of yarn is is radially substantially loaded, in radially expansion, but can not hinder the expansion of ballooning of yarn in vertical direction with the restriction ballooning of yarn by the air ring device for limiting.
As described in claim 11, green phase answers the location of air ring device for limiting to guarantee that ballooning of yarn can upper punch, that is, can outwards do not expanded by the air ring device for limiting under the air ring device for limiting.Thus, the air ring device for limiting is located on cop like this, and promptly it always covers the major part of yarn cone.
Description of drawings
The embodiment that provides with reference to the accompanying drawings further describes the present invention.Wherein:
Fig. 1 shows the lateral plan of cross winding automatic device winding head, and it has the device of optimizing unwinding yarn;
Fig. 2 shows the position of vertical shifting yarn introduction member of the present invention when getting around the beginning again;
Fig. 3 shows the position that moves into Fig. 2 yarn introduction member after capable a period of time again;
Fig. 4 shows the back tipping that is arranged on the sensing device on the winding head and analyzes ballooning of yarn that detects the ballooning of yarn shape and puts;
Fig. 5 shows another preferred implementation vertical adjusting yarn introduction member of Fig. 6 section V-V;
Fig. 6 shows the birds-eye view of Fig. 5 yarn introduction member;
Fig. 7 shows the birds-eye view of the 3rd embodiment vertical adjusting yarn introduction member;
Fig. 8 shows the birds-eye view of the 4th embodiment vertical adjusting yarn introduction member;
Fig. 9 shows the lateral plan of another embodiment cross winding automatic device winding head, has the device of optimizing unwinding yarn.
The specific embodiment
Fig. 1 shows on the whole the diagrammatic side view of the cross winding automatic device of representing with Reference numeral 1.Such cross winding automatic device 1 has a plurality of identical control positioies usually between its tailstock (not shown), here be winding head 2.Be not described further as is known and thus, through winding head 2, the cop 9 that forms on ring spinner is the big volume cross winding bobbin 15 of coiled again, they according to its processing known by manipulator group (not shown) preferably the cross winding bobbin transfer device be transferred to machinery longitudinally on the cross winding bobbin feedway 21 and be transported to bobbin loading-unload station or the similar position that is provided with in mechanical side.
The logic device that cross winding automatic device 1 also has coiling cop delivery system 3 forms usually.In coiling cop system 3, on transfer dish 8 around cop 9 or bare bobbin.In Fig. 1, only show the supply bobbin yarn section 4 of coiling cop system 3, reversible driving memory paragraph 4, to the lateral transfer section 6 and the bobbin section of returning 7 of winding head 2 guiding.
Feeding tube yarn 9 is at the unwinding position AS big volume cross winding bobbin 15 of coiled again, and wherein unwinding position AS is positioned at lateral transfer section 6 zones of winding head 2..For this reason, each winding head 2 (here only sketching as known in the art and thus) have different can be so that the device that winding head is operated in order.These devices for example are to inhale yarn mouth 12, pincers cop 25 and Yarn Connecting apparatus 10.Around the suction yarn mouth 12 of S. A. 16 swing and pincers cop 25 with S. A. 26 respectively by air-breathing connection pipe and machinery longitudinally air intake passage 37 be communicated with.
Such cross winding automatic device also generally includes a Central Processing Unit (CPU) 42, and it is regulated computer device 29 by loom bus 43 with the coiling of each winding head 2 and is connected.
The device of this winding head 2 that does not further describe in addition, is yarn tensioner, yarn clearer, waxing attachment, yarn cutting device, yarn tension sensor and bottom line sensor.
The coiling of cross winding bobbin 15 normally carries out on wind2 24.Such wind2 also has around the bobbin bank 28 of balance staff 13 motion supportings and rotates the device that keeps cross winding bobbin.Be that cross winding bobbin 15 free rotation ground supporting in winding process is being resisted against on the groove drum 14 between the arm of bobbin bank 28 and by its surface, its groove drum drives cross winding bobbin 15 by friction force.
As described in Figure 1, the yarn 31 of pulling out from the head of the cop 9 of unwinding position AS location at first arrives cross winding bobbin 15 through the feed carrier 11 of vertical shifting supporting of the present invention in its path.That is, yarn 31 from the cop 9 with the form unwinding of ballooning of yarn 30.For example yarn fineness of lamination coating, yarn property is depended in the formation of ballooning of yarn, can be subjected to the distance affects between cop bobbin head and the feed carrier 11 when chemical fiber avivage.Its implication is, guarantees to form when the unwinding single air ring by the determined combined action of distance between yarn fineness, winding speed and feed carrier 11 and the cop bobbin head in whole winding process, this guaranteed from the cop head to cop tail condition evenly.
Feed carrier 11 has a yarn introduction member 17, and it moves in the vertical direction of representing with double-head arrow 19 definitely by control apparatus 18.Its control apparatus 18 is connected with the adjusting computer device 29 of reeling by control line 20.
In described embodiment, winding head also has sensing device 22, and it contactlessly detects the formation of ballooning of yarn 30.The sensing device that for example is optical detector is connected with analytical equipment 27, and this analytical equipment 27 is connected with coiling computer device 29 by data line 23.
Fig. 2-4 has schematically illustrated first embodiment of feed carrier 11 of the present invention.The yarn introduction member 17 of vertical shifting is made of the osed top ring integratedly, and its inner diameter d is for example determined according to the yarn fineness of yarn 31.
Fig. 2 shows and walks around the situation that journey begins again, and Fig. 3 shows the situation of walking around the fast end of journey again.That is, pull out yarn 31 from the cop 9 that is positioned at unwinding position AS by its head, yarn 31 then is wound up on the unshowned cross winding bobbin of Fig. 2-4 in known manner.
The yarn introduction member 17 of vertical shifting supporting at first is in reference position SP, has guaranteed that in this position yarn pulls out from cop 9 by the single thread thread balloon 30 that forms.
When walking around Cheng Jinhang again, yarn introduction member 17 moves down by corresponding control apparatus 18, up to yarn introduction member 17 last arrival end position EP shown in Figure 3.Mobile cop 9 reeling conditions that depend on of yarn introduction member 17.
In addition, can be to the central control unit 42 inputs different parameter of other device as winding regulator 29 or cross winding automatic device 1.These parameters for example are the yarn fineness of yarn 31, the length of unwinding cop 9, the diameter d of yarn introduction member 7 and/or the spacing of shape, unwinding cop head 32 and yarn introduction member 17 etc.
In a replacement embodiment shown in Figure 4, in winding head 2 zones for example optical detector of sensing device 22 is set respectively, it contactlessly detects the shape that forms ballooning of yarn 30 when yarn 31 is pulled out.The shape of detected ballooning of yarn 30 is assessed in additional bonded assembly analytical equipment 27 respectively and for example is transferred in the adjusting computer device 29 of reeling by data line 23.
Regulate computer device 29 by reeling, control apparatus 18 forms best ballooning of yarn 30 by the corresponding guiding of yarn introduction member 17.
Fig. 5,6 and 7 and 8 shows other many bodies embodiment of replacing yarn introduction member 17 respectively.
For given yarn fineness and winding speed, the air ring radius is subjected to the internal diameter in minimum vias zone (being guide eyelit 39,40,41 here) or the influence of geometric configuration.The geometric configuration of guide eyelit 39,40,41 plays a part positive to the frictional behavior between the fixing or floating support spare of yarn 31 and yarn introduction member 17, and thus yarn load is played positive role.
Especially as can be seen from Figure 5, in this embodiment, yarn introduction member 17 is made of the matrix 33 by control apparatus 18 vertical shifting, and floating part 34 is set therein.Its matrix 33 has the hole of entrying 35 or 36 respectively in its cover plate zone and baseplate zone.Wanting light as far as possible by yarn 31 out-of-position floating parts 34 in winding process is also for example made by aluminium or plastics.Floating part 34 also has through welding fixing yarn guiding ring 38, and it is made by steel or pottery and has a guide eyelit 39, leads wherein walking around in the journey yarn 31 again.
The guide eyelit 39 of yarn guiding ring 38 can have different shapes.That is, guide eyelit 39 for example has oval hollow cross-section as shown in Figure 6.Guide eyelit also can be as shown in Figure 7 with Reference numeral 4 represent rounded.Certainly guide eyelit also can be polygon 41 as shown in Figure 8.
Fig. 9 shows the winding head according to Fig. 1, wherein at unwinding position AS one air ring device for limiting 50 is installed also.This air ring device for limiting 50 is along with the continuous unwinding of cop 9 also limits the radiuses of ballooning of yarn thus by actuating device 51 continuous declines, as shown in Figure 9.
This ballooning of yarn 30 can be regarded the restricted string of a musical instrument vibration of different obviously decay as, and wherein external curve forms the intrinsic curve of rotation air ring.Free length of yarn is that the unwinding yarn position and the yarn line segment between the yarn introduction member 17 of location on the cop 9 of cop 9 can consider to be equivalent to string of a musical instrument clamping length.
The formed balloon shape of free ballooning of yarn is similar to the string of a musical instrument and vibrates normally sinusoidal vibration characteristic.The grade of string of a musical instrument vibration is corresponding to the quantity of ballooning of yarn.Relative is to determine single air ring like this, and promptly its air ring structure does not have waist.To this, along with the increase of balloon height, when angle of lag was spent greater than 180, the first harmonic of vibration string line was seen two air rings as.This ballooning of yarn forms the inclination serious with respect to constriction, has promptly formed waist.
Similarly, when dragging the latitude angle to spend, form three layers of air ring greater than 270.This means, can influence the possible quantity that forms ballooning of yarn and to the yarn pulling force of yarn generation effect by drift.
That is to say that the yarn introduction member 17 of vertical shifting supporting can form the guide zone of motion.For whole cop 9, for example between cop 9 heads and yarn introduction member 17, form bigger distance.This distance reduces along with the increase that is unwound to ideal position.For whole cop 9, the distance between cop head and the yarn introduction member 17 preferably is about 60mm according to cop length and yarn fineness.At the ideal position of yarn introduction member 17, this distance is about half.
Except drift, centnifugal force and air resistance also can produce very big influence to the formation of air ring.These two kinds of power and different constant and variable relating to parameters.The parameter that directly influenced by winding process mechanical technique condition also has the mean radius of air ring except drift.
As mentioned above, when drift was passed through the position adjustments of yarn introduction member 17, the increase of the maximum of air ring radius was determined by the air ring device for limiting 50 that descends on cop 9.
Realized walking around in the journey whole by vertical shifting supporting yarn introduction member 17 again, discharged yarn 31 by single air ring 30 from cop 9, this is special relevant with air ring device for limiting 50.Especially for whole cop, prevented that also the ballooning of yarn that comes off from falling on the cop tube head and cause trouble thus.