CN1746348A

CN1746348A - Doffer of spinning apparatus with free end rotor

Info

Publication number: CN1746348A
Application number: CN 200510103609
Authority: CN
Inventors: F·里德尔; G·鲍尔
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2004-09-06
Filing date: 2005-09-06
Publication date: 2006-03-15
Also published as: ITMI20051614A1; AT500772B1; TW200609393A; TWI329145B; DE102004044101A1; AT500772A2

Abstract

A doffing nozzle of a free end rotor spinning device has a funnel-shaped yarn turning zone and a hollow cylindrical nozzle tube connected with the yarn turning zone which are respectively arranged inside a nozzle member divided by a dividing seam, wherein the inside of the yarn turning zone is provided with a plurality of helical line-type rib-shaped ridges; the ridges becomes steep inside the axial section of the doffing nozzle in the direction turning towards the nozzle tube, and is basically parallel to the axial line of the doffing nozzle at the dividing seam and then is led out; the bulges arranged inside the nozzle tube are corresponding to the rib-shaped ridges; moreover, the bulges are also parallel to the axial line of the doffing nozzle but are staggered to the rib-shaped ridges in tangent direction.

Description

The doffer of open-end rotor spinning unit

Technical field

The present invention relates to the doffer of open-end rotor spinning unit, has the open circles cartridge type blast tube that the infundibulate yarn turns to the district and is attached thereto, have and be located at rib shape protuberance in the yarn guide portion, that constitute with the linear formula of multi-head spiral, this swells (in the axial cross section of doffer) along the direction steepening towards blast tube, and extends in the zone of blast tube.

Background technology

The doffer of open-end rotor spinning unit is the quality of yarn to spraying not only, and to the stability of spinning, also promptly to yarn breakage number of times generation influence greatly.Here show, utilize same doffer can not always satisfy above-mentioned two kinds of requirements simultaneously, be yarn qualities and spinning stability.

It is verified that the yarn of constructing doffer smoothly turns to the yarn of district or doffer to turn to the district to have a so-called helical structure, can obtain good yarn qualities.Yet, should " spiral nozzle " generally have too low spinning stability.

Therefore, in order to improve spinning stability, developed at yarn and turned to the doffer that has fluting or analog in the district, temporary transient (vor ü bergehend) produces so-called false twisting in the yarn that is produced thus, and this false twisting helps spinning stability.But this fluting often produces negative influence to yarn qualities.

Doffer by the known the above-mentioned type of DE 37 07 526 A1, this doffer turns to the rib shape protuberance that has the linear formula of multi-head spiral in the district at yarn, described protuberance extends to the zone of blast tube, and (in the axial cross section of doffer) be steepening gradually, and also has clear and definite parts in tangential direction.No longer construct blast tube itself.This doffer is favourable for good yarn qualities, however for the spinning stability be not enough.

By the known a kind of doffer of inhomogeneous DE 39 34 166 C2, wherein yarn turns to district and blast tube to be positioned on the separated member in boundary seam place.Blast tube has the convex structure, and yarn turns to the district to have the sickleshaped fluting.This doffer satisfies spinning stability, yet does not but satisfy all expectations of yarn qualities aspect, because it is too in requiring harshness (aggressiv).

Summary of the invention

Task of the present invention is, realizes the doffer that is in harmonious proportion yarn qualities as far as possible and spins stability requirement.

The present invention solves in the following manner, even yarn turns to district and blast tube to be located in the separated nozzle assembly in boundary seam place, described rib shape protuberance is arranged essentially parallel to the axis of doffer and draws (auslaufen) at boundary seam place, and the projection in the blast tube is corresponding to the protuberance of rib shape, described projection also is parallel to the axis of doffer, but staggers with rib shape protuberance on tangential direction.

Turn to the multi-head spiral line structure in the district to come generation power by the infundibulate yarn, described masterpiece is used for yarn, and its big I is by the protuberance influence of rib shape.This makes and improves quality of yarn.On the other hand, also cause by the rib shape protuberance that is arranged in parallel towards the blast tube direction: in the zone of critical (kritisch) yarn, the temporary transient false twisting that produces raising spinning stability.Swell the stabilizing effect that strengthens spinning by the projection in the blast tube corresponding to the rib shape, wherein said protuberance also is parallel to the axis of doffer, but staggers with rib shape protuberance on tangential direction.Turn to the boundary between district and the blast tube to stitch because nozzle assembly comprises yarn, simplified the manufacturing of doffer on the whole.Comprising the member with the projection in the blast tube that yarn turns to the nozzle arrangement with helical structure in district and comprise blast tube can simply be made with being separated from each other, and is combined into unified doffer at work.On the tangential direction rib shape protuberance and projection between the structure that staggers be suitable so that in boundary seam scope, avoid various tolerances.Because can not make projection " seamlessly " be connected in rib shape protuberance in fact substantially, so if in tangential direction bigger deviation is arranged at the very start, so can be more better.Do not influence the work of doffer thus.

If equate,, also be suitable even so not necessarily need at regional internal-rib shape protuberance of boundary seam and number of protrusions.If convexity rib shape protuberance is wide, also be not influence.Projection in the blast tube can be set, make that the passage that (in the cross section of blast tube) intersects therein is (frei) that communicates.

If two nozzle arrangements, promptly comprise yarn and turn to the nozzle arrangement in district and comprise blast tube and the nozzle arrangement of projection is made by pottery respectively, so because long service life but favourable with rib shape protuberance.

Description of drawings

Other advantages of the present invention and feature draw from the following explanation of the embodiment shown in the very big amplification.

Fig. 1 illustrates the axial cross section by spinning rotor and doffer.

Fig. 2 illustrates the view in the arrow II of Fig. 1 direction on the doffer with the form of very big amplification.

The specific embodiment

Only the open-end rotor spinning unit shown in the part comprises by rotor disk 2 and is pressed into the spinning rotor 1 that handle 3 is wherein formed in Fig. 1.Handle 3 is supported and is driven in the mode that does not illustrate.When work, rotor disk 2 rotates in vacuum chamber 4, and described vacuum chamber is made of the rotor case 5 that is connected in vacuum source (airintake direction) in the mode that does not illustrate.

Rotor disk 2 has the fiber sliding surface 7 of taper ground to 6 expansions of fiber collector groove.Hollow lumen at fiber collector groove 6 rotor dishes 2 has its maximum gauge.The opening 8 of the front by rotor case 5 makes spinning rotor 1 pull to the fore side of (herausziehen) open-end rotor spinning unit.When work, make the described opening 8 of rotor case 5 and front side 9 sealings of the opening of rotor disk 2 by the backplate 10 that can remove.When work, under situation about connecting in the middle of the sealing ring 11, backplate 10 is placed on the rotor case 5.

Backplate 10 is included in the fiber feeding passage 12 outside the plan, and this fiber feeding passage starts from the shredding roller in the mode that does not illustrate, and it exports 13 aligned fibers sliding surfaces 7.Because the effect of so-called vacuum source, when work, make fiber separately pass fiber feeding passage 12 directive fiber sliding surfaces 7 by the shredding roller, it is slided into the fiber collector groove 6 from this fiber sliding surface, form there fibrous ring and in known manner on the axis direction of handle 3 output by the yarn shown in the chain-dotted line 14.Can flow out to the front side 9 of the opening of spinning rotor 1 through overfall 15 by the conveying air of fiber feeding passage 12 suctions.

At first from least near the fiber collector groove 6 the normal plane of the relative handle 3 of spinning rotor 1 and subsequently according to reference direction B by means of the yarn roller that does not illustrate to by going out the spun yarn 14 of yarn channel 16 outputs, and offer the mound bobbins that does not also illustrate.Goes out yarn channel 16 and be arranged in the initiation region coaxial at least, thereby the yarn 14 that leaves fiber collector groove 6 at first turns to about 90 ° with the handle 3 of spinning rotor 1, wherein said yarn 14 in described normal plane equally with crank shape carry out around.

The manifold doffer 17 that still will describe is used for from described normal plane yarn 14 being redirect to out the yarn channel 16, described doffer turns to district's 18 beginnings from the yarn of the bending of infundibulate basically on the plane 19 that is arranged in normal plane, and carries out the transition in the open circles tubular blast tube that is attached thereto.This yarn turns to district 18 and blast tube 20 in the

ceramic nozzle member

21 and 22 separately, and both adhere to described nozzle arrangement in the nozzle bearing 23.The latter is by means of keeping magnet 24 and 25 to be fixed on the backplate 10.

Here mention big many of the speed of the yarn 14 among the circular velocity specific output direction B of yarn 14 crank shape.Based on the yarn 14 of 19 places, plane output with crank shape carry out around, yarn 14 from blast tube 20 beginnings with carry out spherically around, wherein be pressed on the wall 26 of blast tube 20 by centrifugal force.Utilize described situation by forming wall 26 in special mode.

As mentioned above, doffer 17 should satisfy the conflicting a plurality of requirements of part, also promptly: guarantee the good quality of the yarn 14 of ejection on the one hand, and yarn is not easy fracture on the other hand.Basically turn to district 18 to satisfy quality requirement by the particular design yarn, satisfy the requirement of spinning stability basically by the wall 26 of design blast tube 20.Below with reference to Fig. 2 it is described further.

Turn in the district 18 at yarn, be provided with the

rib shape protuberance

27,28,29 and 30 of the linear formula of four-start spiral, described protuberance is rounding well.They originate in the zone on nozzle limit 31, and extend to the zone of blast tube 20, and wherein they extend until the axle that probably is parallel to doffer 17 when arriving blast tube 20 at steepening gradually on the direction of blast tube 20.Roughly form this rib shape protuberance 27 to 30 with identical width continuously.Yarn turns to the helical structure in the district 18 to cause yarn qualities good.

Especially for the reason of making, construct manifold doffer 17, making yarn turn to district 18 and blast tube 20 to be placed in can stitch in the separated nozzle assembly 21 in 32 places and 22 in boundary.Boundary seam 32 is positioned at rightly that convex surface that yarn turns to district 18 is ended and place that the zone of the complete hollow cylinder of blast tube 20 begins.The rib shape protuberance 27 to 30 at boundary seam 32 places is arranged essentially parallel to the axis of doffer 17.In blast tube 20, the projection 33 that equally also is parallel to the axis of doffer 17 swells 27 to 30 corresponding to described rib shape.Yet projection 33 staggers with rib shape protuberance 27 to 30 on tangential direction.Based on described arrangement of staggering, do not need to consider the tolerance of the transition position between described rib shape protuberance 27 to 30 and projection 33.

Especially as can be seen from Figure 2, projection 33 (in the cross sections of blast tube 20) communicate the passage 34 of intersection.In addition, it can also be seen that from Fig. 2 that projection 33 is preferably wide than rib shape protuberance 27 to 30.

Based on the seam of the boundary between two

nozzle arrangements

21 and 22 32, not necessarily need to make the number of rib shape protuberance 27 to 30 and the number of projection 33 to equate.Neither be essential, make rib shape protuberance 27 to 30 absolute parallel in the axis of doffer 17.At last, even allow to have little distance at the end of rib shape protuberance 27 to 30 and the top of projection 33.

Claims

1. the doffer of an open-end rotor spinning unit (17), it has an infundibulate yarn and turns to district (18) to distinguish an open circles cartridge type blast tube (20) that links to each other with turning to yarn, have and be located at yarn and turn in the district (18), rib shape protuberance (27-30) with the linear formula formation of multi-head spiral, this protuberance is seen in the axial cross section of doffer (17) towards blast tube (20) steepening, and extend in the zone of blast tube (20), it is characterized in that, described yarn turns to district (18) and described blast tube (20) to be located to locate at boundary seam (32) can separated nozzle arrangement (21,22) on, described rib shape protuberance (27-30) stitches (32) in described boundary and locates to be arranged essentially parallel to the axis of doffer (17) and draw, and the projection (33) in the blast tube (20) is swelled (27-30) corresponding to described rib shape, described projection also is parallel to the axis of doffer (17), but staggers with rib shape protuberance (27-30) on tangential direction.

2. according to the described doffer of claim 1, it is characterized in that in the zone of described boundary seam (32), the number of rib shape protuberance (27-30) and the number of projection (33) equate.

3. according to claim 1 or 2 described doffers, it is characterized in that in the cross section of blast tube (20), described projection (33) communicates the passage (34) of an intersection betwixt.

4. according to the described doffer of one of claim 1 to 3, it is characterized in that, described projection (33) than described rib shape swell (27-30) wide.

5. according to the described doffer of one of claim 1 to 4, it is characterized in that two nozzle arrangements (21,22) are all made by pottery.