CN1470691A

CN1470691A - Yarn-resisting twisting head for open-end spinning apparatus

Info

Publication number: CN1470691A
Application number: CNA031486029A
Authority: CN
Inventors: G; G·施塔莱克
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2002-06-20
Filing date: 2003-06-20
Publication date: 2004-01-28
Also published as: EP1375711A3; DE10228504A1; EP1375711A2; EP1375711B1; ATE455883T1

Abstract

The invention relates to a cotton roller of an airflow spinning device which comprises an arch contacting face making an extracting cotton yarn deflect. The contacting face is a loading tube. The contacting face is provided with a notch groove or convex line unevenness which makes the extracting cotton yarn cross at the crossing acute angle different from 0 degree and 90 degrees of the whole length. The adjacent unevenness should be arranged closely to contact one unevenly. The crossing angle had better close to the constant in the whole length of the unevenness.

Description

The Yarn resistant twisting head that is used for open end spinning apparatus

Technical field

The present invention relates to a Yarn resistant twisting head (Garnabzugsd ü se) that is used for open end spinning apparatus, it contains an arch contact-making surface that makes the yarn of extracting out do deflection, this contact-making surface is that the end face from a substantially flat carries out the transition to the pipe that doffs that is basically perpendicular to this end face, the linear unevenness that cutting or convex shape are arranged on contact-making surface, this unevenness make the yarn extracted out intersect in an intersection acute angle that obviously is different from 0 ° and 90 ° in its whole length.

Background technology

This unevenness of Yarn resistant twisting head is known to everybody, can be designed to cutting or convex tendon form.Usually this unevenness of practical application can radially also can be the center of spirality ground facing to Yarn resistant twisting head.The yarn that rotates around the centre-crank mode of Yarn resistant twisting head, for these unevenness in crosspoint, if when unevenness radially nearly one 0 ° the angle of the crossing, or when the spirality unevenness, have one near 90 ° the angle of the crossing.For example U.S. Pat 3,965, the spirality unevenness that radially unevenness of mentioning in 661 and German patent DE 37 07 526 A1 mention.The existing concentric patent (seeing Germany Patent document 21 40157) also known for everyone that faces toward the cutting shape unevenness of settling at the center that radially also has is set on same Yarn resistant twisting head.

In addition, the Fig. 9 and 10 by DE15 60 302 C3 specifications learns that the contact-making surface of Yarn resistant twisting head does not have basic tangential cutting or convex tendon facing to the pipe distribution of doffing.Therefore unevenness is with a scissors junction, is different from 0 ° and 90 ° significantly.Therefore the present invention is based on last alleged patent specification.

The yarn that the Yarn resistant twisting head guiding is spun into is outwards exported in the promptly alleged cup from the heart spare of open end spinning apparatus.The design of Yarn resistant twisting head itself is very big to the spinning stability influence of the quality of resultant yarn and open end spinning apparatus.Spinning conditions in the structure final decision cup of resistance twist head.This point is particularly useful for the twisting of yarn, and turn is from the run back inside of cup fibre deposition groove of resultant yarn always.Here, the Yarn resistant twisting head unevenness that is provided with cutting or convex form proves suitable half measure.Therefore the yarn of output obtains a so-called false twisting that improves spinning stability, and this false twisting is interrupted periodically, and " rebounding " to a certain degree done in false twisting therebetween sometimes.It's a pity, improve spinning stability and usually follow yarn quality to degenerate.

Summary of the invention

Task of the present invention is to create the Yarn resistant twisting head with above-mentioned unevenness, is not only spinning stable but also also have superperformance on spinning quality.

The solution of this task is that the close degree that adjacent unevenness is placed should be able to make yarn touch a unevenness all the time at least.

Use these features of the present invention and create the Yarn resistant twisting head of a band contact-making surface, false twist effect strengthens improving spinning stability and fibre damage not occur on this contact-making surface, and this Yarn resistant twisting head is the Yarn resistant twisting head of band cutting in the practice known to everybody.According to inventive features, yarn the continuous edge of unevenness the rolling that is pulled.According to the unevenness curve of invention, guarantee yarn have in design under the condition of cutting unevenness unlikely a little enter into cutting, but the certain winding of experience on the contact-making surface radius at cutting edge, the false twist effect of this windings enhancing resistance twist head and do not damage fiber.

So-called unevenness should be arranged like this, and the angle of the crossing of the yarn of extracting out remains between 15 ° and 45 °.If the angle of the crossing is near constant along the whole length of unevenness at least, has special advantage.This requires the curve of arc slightly for the unevenness according to invention design, and has a kind of very continuous power to import on the other hand.

The direction of the angle of the crossing has two kinds of possibilities in principle: set out in the zone of the pipe that doffs certainly, and unevenness can be according to the yawing moment of yarn or by opposite direction.

Other advantages of the present invention and feature will be known at more following examples of implementation.

Description of drawings

Fig. 1 has the strong enlarged drawing of a part of axial cross section according to the open end spinning apparatus of the Yarn resistant twisting head of invention;

Fig. 2 presses the Yarn resistant twisting head view of the amplification signal of arrow II direction among Fig. 1;

Fig. 3 is according to the enlarged drawing of Fig. 2 middle section III-III, and illustrated here roughness design is cutting;

The unevenness schematic diagram that is designed to the convex tendon form of the similar Fig. 3 of Fig. 4;

Fig. 5 has also done to amplify more by force to the partial view of the curve of approximation figure of Fig. 2 for a particularly preferred modification according to invention is described.

The specific embodiment

The open end spinning apparatus of only partly showing among Fig. 1 contains a cup 1, and it is made up of a cup dish 2 and an axle 3 that is pressed into wherein.Axle 3 is not figured its supporting and transmission.

Cup dish 2 rotates in the vacuum chamber 4 that a cup cover 5 forms during production, covers with place's vacuum source of not illustrating among the figure to be connected.

Cup dish 2 has a tapered fibre sliding surface 7 towards 6 expansions of fibre deposition groove.The empty inner chamber of cup dish 2 has its maximum gauge in fibre deposition groove 6.Cup 1 can be by cup dish cover 5 an open front 8 be pulled out towards operating surface.During production, the opening 8 of cup cover 5 is sealed by a removable cover plate 10 together with the front of opening wide 9 of cup dish 2.Cover plate 10 is to connect under O-ring seal 11 situations in the centre to lean against on the cup dish cover 5.

Cover plate 10 contains a fibre transportation pipe 12 that is in outside the plan because usually mode it be to originate in combing roller, so do not illustrate, its mouth of pipe 13 is towards fiber sliding surface 7.By above-mentioned vacuum source effect, single fiber is delivered to fiber sliding surface 7 by combing roller by fibre transportation pipe 12 when producing, slide in the fibre deposition groove 6 from this fiber, form a fibrous ring, in mode known to everybody as spun yarn 14 axially being drawn out of by axle 3.Can be flowed out in the front of opening wide 9 of cup 1 through an overflow slit 15 by the conveying air of fibre transportation pipe 12 suctions.

The spun yarn 14 that dots, at first be close to a normal face of the relative axle 3 of cup 1 at least, and then export and enter on the winding bobbin of not representing on the figure by not shown a pair of delivery roller via the pipe 17 that doffs of a Yarn resistant twisting head 18 by drawing direction A from fibre deposition groove 6.The spools 3 coaxial of pipe 17 and cup 1 of doffing makes yarn 14 approximately turn to 90 ° by Yarn resistant twisting head 18, and yarn 14 can be seen as crank-like from Fig. 2 and rotating by yawing moment B on above-mentioned normal face here.Yarn resistant twisting head 18 tightens in the corresponding hole of cover plate 10 by external screw thread 20.

A tubaeform circular arch contact-making surface 21 is used for making yarn 14 to redirect in the pipe 17 that doffs from above-mentioned normal face, and contact-making surface 21 starts from an end face 19 that is in the substantially flat in the normal face.Contact-making surface 21 is a circular arc arch face in axial cross section shown in Figure 1, its pipe minimum cross-section 22 of 17 that and then doffs.Contact-making surface 21 constitutes an about quadrant at illustrated axial cross section, and radius of curvature is 3mm for example.

Under the mode, contact-making surface 21 is designed to linear unevenness 23, and can be designed to cutting 24 or be designed to the convex tendon form according to Fig. 4 according to Fig. 3 known to everybody.Invention makes every effort to produce the yarn 14 of good quality in view of the technical scheme of this unevenness 23 under the high spinning stability condition of open end spinning apparatus.

Especially see from Fig. 2 that linear unevenness 23 makes the yarn of extracting out 14 intersect in the angle of the crossing α of an acute angle on its whole length, this angle of the crossing obviously is different from 0 ° and 90 °.In addition, adjacent unevenness 23 has also been made such close arrangement, makes yarn 14 contact a unevenness 23 all the time at least, preferably touches a plurality of unevenness 23 simultaneously.Like this, the yarn of particularly having extracted out 14 is experience winding to a certain degree on the edge of unevenness 23 under the radius effect of contact-making surface 21, and can for example not be pulled into bottom the cutting.This moment, angle of the crossing α was preferably between 15 ° and 45 °.From the zone of the pipe 17 that doffs, unevenness 23 is pointed to the yawing moment B of yarn 14 in modification shown in Figure 2.

What should mention here is that deflection speed B exceeds much than the speed of yarn 14 at outbound course A.

According to the Fig. 5 shown in the amplification, a modification is described below, wherein angle of the crossing α is approaching at least constant on the whole length of unevenness 23.In addition, with Fig. 2 different be unevenness 23, from the cop pipe 17 zone directed in opposite of doffing in the yawing moment B of yarn 14.

Only the contact-making surface 21 of schematic representation between discernible two quadrants, only illustrates three linear unevenness, i.e. cutting or convex form on contact-making surface in Fig. 5.Certainly, on the entire contact surface 21 such unevenness 23 is arranged all.In addition, can see that one is rotated by yawing moment B from figure, with the yarn 14 moments scanning that solid line is represented, this yarn also moves to outbound course A.With dashed lines 14 ' and 14 " expression yarn 14 moment successively.

We see that unevenness 23 is designed to the slightly curve of arc, and angle of the crossing α is remained unchanged on the position of each unevenness 23.Many angle of the crossing α have been represented among Fig. 5.In addition, the layout of adjacent unevenness 23 should be tight so close, makes yarn touch a plurality of unevenness 23 all the time.

Claims

1. a Yarn resistant twisting head that is used for open end spinning apparatus, have an arch contact-making surface that makes the yarn of extracting out do deflection, this contact-making surface is that the end face from a substantially flat carries out the transition to the pipe that doffs that is basically perpendicular to this end face, and on contact-making surface, settle linear unevenness, this unevenness makes the yarn extracted out intersect with an intersection acute angle that obviously is different from 0 ° and 90 ° in its whole length, it is characterized in that, the setting of adjacent unevenness (23) should be such closely close, promptly yarn (14) touches a unevenness (23) all the time at least.

2. according to the Yarn resistant twisting head of claim 1, it is characterized in that the angle of the crossing (α) is between 15 ° and 45 °.

3. according to the Yarn resistant twisting head of claim 1 or 2, it is characterized in that the angle of the crossing (α) approaches constant at least on the whole length of unevenness (23).

4. according to one of in the claim 1 to 3 Yarn resistant twisting head, it is characterized in that unevenness (23) is from the yawing moment (B) of pipe (17) the zone sensing yarn (14) that doffs.

5. according to one of in the claim 1 to 3 Yarn resistant twisting head, it is characterized in that unevenness (23) is from the zone sensing of the pipe (17) that doffs and the opposite direction of yawing moment (B) of yarn (14).