CN1542177A

CN1542177A - Spooling nozzle of open end spinning device

Info

Publication number: CN1542177A
Application number: CNA200410032973XA
Authority: CN
Inventors: G; G·施塔莱克
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2003-04-14
Filing date: 2004-04-14
Publication date: 2004-11-03
Anticipated expiration: 2024-04-14
Also published as: CZ2004464A3; CN100507105C; AT501433B1; DE10318305A1; AT501433A1

Abstract

An open-ended spinning assembly has a yarn discharge jet with a cranked and cambered contact surface translating from an end-face to a discharge passage. The contact surface has asymmetric notches (21) that are shallow at the inlet and translate at the outlet to a deeper contact interface. The sickle-shaped notches profile is in opposition that of the cranked yarn (14) profile. The notches (21) have an approximately constant radius of curvature. The jet has four or more notches.

Description

The doffer of open end spinning apparatus

Technical field

The present invention relates to be used for the doffer of open end spinning apparatus, it have one make one that will drop out and resemble the contact-making surface of the protuberance of the yarn deflection of rotating the crank simultaneously, this contact-making surface carries out the transition to the passage that doffs from an end face, this doffer also have be arranged in this contact-making surface and extend asymmetrical otch from this end region to the passage that doffs, these otch have a milder inlet wall and have a steeper retaining wall in its yarn outlet side at its yarn entrance side.

Background technology

Doffer is the yarn that the outside guiding of so-called rotor is spun into from the core members of open end spinning apparatus.The structure of doffer itself produces very big influence to the quality of spun yarn and the spinning stability of open end spinning apparatus.The spinning conditions in the rotor has been determined on the project organization final decision ground of doffer.Especially true aspect yarn twist, described yarn twist returns to the fine groove of the collection inside of rotor always from the yarn that is spun into.The out-of-flatness structure that formation is otch or shape for lugs is proved to be suitable compromise settling mode here.Doffing obtains a so-called false twisting thus, and described false twisting has improved spinning stability and always periodically has been interrupted, and reason is that false twisting often has certain bounce-back.But it is not to follow the quality of yarn that is spun into to worsen to occur that people have to be noted that the raising of spinning stability.

The doffer of the above-mentioned type discloses in the DE19906111A1 of prior art and German prospectus DE2140157 (its Fig. 3).

In such doffer, yarn gently floats towards the otch bottom surface and is temporarily stopped fast there, and wherein after leaving the otch bottom surface, yarn is directed to retaining wall and leaves otch.On the one hand, the drag that such otch is applied on the yarn must be big as far as possible, and on the other hand, such otch must be decontroled yarn again after reaching certain tension force, so that yarn can roll on the direction of rotation of doffer.In other words, the degree of depth of so known otch must be obtained by experiment.

In the different doffer of type, DE19949533A1 and DE3934166C2 disclose following content, and promptly otch is configured to the bending that sickleshaped and its trend are adapted to resemble the yarn that rotates the crank.That is to say that the moment shape of the yarn that the bending of otch is adapted to drop out is so that yarn arrives in the kerf bottom fully through each otch the time.

Summary of the invention

Task of the present invention is so to improve the doffer of the described type of beginning, and promptly same otch differently influences yarn, and is to strengthen twisting on the one hand, and is temporary transient retardance twisting on the other hand.

So finish this task, promptly these otch bend to sickle shaped on the contrary with the bending of the yarn that becomes the crank-like rotation.

Different with the sickle shaped otch in the last described document, the yarn that drops out especially should intersect with these otch in the doffer end region.Because these otch curve sickle shaped on the contrary with the bending of the yarn that is the crank-like rotation, the inhomogeneous effect of these otch has appearred in the result, the false twisting effect of strengthening has appearred in the zone of doffer end wall, this has improved spinning stability, and retaining wall plays a role towards the passage that doffs more, and described retaining wall temporarily blocks yarn.Therefore, doffer of the present invention is the good compromise of spinning stability and yarn qualities.

In form of implementation of the present invention, these otch have one at the reaping hook vpg connection and approximately at least stablize constant radius of curvature.Fact proved that advantageously each contact-making surface is provided with at least four otch.

Description of drawings

Obtain other advantage of the present invention and feature from following description to an embodiment, accompanying drawing is depicted as:

Fig. 1 is the axial cross section enlarged drawing of the open end spinning apparatus part in doffer of the present invention zone;

Fig. 2 is the enlarged side view of the doffer of the present invention seen from the arrow II direction of Fig. 1;

Fig. 3 shows the enlarged drawing of part shown in Figure 2 according to cross section III-III, and shown in the figure is the unwinding state.

The specific embodiment

The open end spinning apparatus that a part only is shown in Fig. 1 comprises a rotor 1, and this rotor comprises a cup dish 2 and a bar 3 that is crushed in the cup dish.Bar 3 is supported and is driven by unshowned mode.

At work, cup dish 2 rotates in a negative pressure chamber 4, and this negative pressure chamber constitutes by a rotor shell 5, and this rotor shell joins according to unshowned mode and a negative pressure source.

Cup dish 2 has a tapered fibre guide face 7 that enlarges to the fine groove 6 of a collection.In the fine groove 6 of collection, the hollow cavity of cup dish 2 has its maximum diameter.Rotor 1 can be by the outer always fore side that pulls to open end spinning apparatus of one of this rotor shell 5 forward opening, 8 quilts.In the middle of work, the opening 8 of this rotor shell 5 closes by the lid that can remove 10 with the open front side 9 of cup dish 2.Lid 10 is provided with in the centre under the situation of a sealing ring 11 and is attached on the rotor shell 5.

Lid 10 comprises a fiber transmission channel 12 that is positioned at outside the drawing, and this fiber transmission channel originates in an opening roller and its port 13 aligned fibers spigot surfaces 7 according to unshowned mode.Effect by so-called negative pressure source, the fiber that is gone out by the opening roller shredding is mapped on the fibre guide face 7 through fiber transmission channel 12 ground at work, fiber enter therefrom the collection fine groove 6, form a fibrous ring there and according to known way as yarn shown in dotted line 14 axially being dropped out along bar 3.The conveying air that is inhaled into by fiber transmission channel 12 flows away by one overflow seam 15 on the open front side 9 of rotor 1.

The yarn 14 that is spun at first from collect fine groove 6 at least approx one of rotor 1 near in the Normal plane of bar 13 and subsequently by a doffer 17 doff passage 16 and along the direction A ground that doffs by a unshowned roller that doffs to being dropped out and be fed to an also unshowned winding bobbin.The passage 16 that doffs is concentric with the bar 3 of rotor 1, and therefore, yarn 14 roughly turn 90 degrees partially by doffer 17, and here, yarn 14 resembles according to rotation direction B (see figure 2) in above-mentioned Normal plane and rotates the crank.Doffer 17 is fixed on the lid 10 by positioning magnet 18.

A contact-making surface 19 that is the infundibulate protuberance is used for making yarn 14 to deflect into the passage 16 that doffs with leaving above-mentioned Normal plane, and this contact-making surface originates in an end face 20 that is arranged in this Normal plane of this doffer 17.In axial cross section shown in Figure 1, contact-making surface 19 is faces that bulge into circular arc, and it is immediately following after the minimum cross-section of passage 16 that doffs.This contact-making surface 19 shown in axial cross section in roughly to constitute its radius of curvature for example be 3 millimeters quadrant.

According to known mode itself, contact-making surface 19 has some otch 21, but here, these otch form according to particular form according to the present invention.

Be noted that in the speed of the yarn on the rotation direction B 14 more much higher here than the speed of the yarn 14 on the direction A that doffing.

Below, in conjunction with the view of many times of Fig. 2,3 amplification invention itself is described.

As shown in the figure, these otch 21 are asymmetric, and its way is exactly that they have a milder inlet wall 22 and have a steeper retaining wall 23 on its yarn outlet side on its yarn entrance side.These otch 21 extend from end face 20 zone of doffer 17 to doffing passage 16 and curve sickle shaped always, but unlike the prior art be the yarn 14 of the bending of these otch and the rotation of one-tenth crank-like crooked opposite.So, especially as illustrated in fig. 2, become the yarn 14 of crank-like rotation to intersect with these otch 21.In the zone of end face 20, the angle of the crossing is bigger, thereby has produced the false twisting effect of strengthening, and this causes the improvement of spinning stability, and in the zone of passage 16 of doffing, the retaining wall 23 that temporarily blocks yarn 14 plays a role more consumingly.In the view of Fig. 2, these otch 21 have one and approximately at least stablize constant radius of curvature.It is favourable that four otch 21 are set.

Claims

1. the doffer of an open end spinning apparatus, it have one make one that will drop out and resemble the contact-making surface of the protuberance of the yarn deflection of rotating the crank simultaneously, described contact-making surface carries out the transition to the passage that doffs from an end face, this doffer also have be arranged in this contact-making surface and extend asymmetrical otch from this end region to this passage that doffs, these otch have a milder inlet wall and have a steeper retaining wall on its yarn outlet sides on its yarn entrance side, it is characterized in that these otch (21) curve sickle shaped on the contrary with the bending of the yarn (14) that is the crank-like rotation.

2. doffer as claimed in claim 1 is characterized in that, these otch (21) have one and approximately at least stablize constant radius of curvature.

3. doffer as claimed in claim 1 or 2 is characterized in that, is provided with at least four otch (21).