EP0568665A1 - Drawing unit for a fine-spinning machine, in particular a jet-spinning machine. - Google Patents
Drawing unit for a fine-spinning machine, in particular a jet-spinning machine.Info
- Publication number
- EP0568665A1 EP0568665A1 EP92922973A EP92922973A EP0568665A1 EP 0568665 A1 EP0568665 A1 EP 0568665A1 EP 92922973 A EP92922973 A EP 92922973A EP 92922973 A EP92922973 A EP 92922973A EP 0568665 A1 EP0568665 A1 EP 0568665A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- attachment
- roller
- thread
- drafting
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009987 spinning Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000000151 deposition Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007378 ring spinning Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920006240 drawn fiber Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/74—Rollers or roller bearings
Definitions
- the invention relates to a drafting system of a Feinspinnmaschi ne, in particular jet spinning machine, according to the preamble of claim 1.
- the known apron drafters for fine spinning machines are made of several continuous steel rollers or Unterzy cylinder and for each spinning station a drafting arm on which the spring-loaded top rollers are attached.
- Solc strechwerke are known for example from the book by Dr.Ing.W.W gener "Die Streckwerke der Spinnereimaschinen" (Edition 1965 Springer Verlag).
- An example of such a load arm can be found in DE-A-30 25 032. Drafting arrangements that have been specially designed for nozzle spinning can be found in US 4,718,225 and US 5,038,553.
- the yarn end When re-spinning onto a yarn end of a broken spinning thread, e.g. the yarn end is returned through the spinnerets of a nozzle spinning machine and is guided past the drafting system, for example in the manner described in DE-A-37 06 728, the returned yarn section is to be guided into the clamping line of the rotating pair of output rollers.
- This so-called depositing of the yarn section should preferably be carried out in a flowing sequence, so that the yarn end is moved safely and in time to the center of the nip line of the exit rollers.
- the thread In contrast to the deposit method, which is used, for example, according to DE 39 32 666 when starting in a ring spinning machine, the thread extends in one Nozzle spinning machine before depositing through the nozzle, which has an opening in or on the gusset of the delivery roller pair (also called output roller pair).
- the delivery roller pair also called output roller pair.
- Such contact is justifiable when ring spinning (cf. DE 39 32 666, FIG. 3), but not in the case of nozzle spinning (with a noticeably higher delivery speed).
- the invention now has the object, on the one hand, of improving a drafting arrangement of the type mentioned above in such a way that a safe and timely depositing of the yarn section is ensured. This object is solved by the features of claims 1 and 2.
- the object of the invention is further to improve the re-spinning (in particular in a nozzle spinning machine) compared to the previously known methods. This object is solved by the features of claim 9.
- the invention has the advantage that, with a simple and inexpensive means, the thread can be held in a suitable standby position before being deposited, so that a secure and timely deposit of the yarn section is guaranteed. Further advantages follow from the description below, in which the invention is explained in more detail with reference to examples shown in the figures. It shows: 1 shows the arrangement of a nozzle body with respect to the output rollers of a Rie chenstrecktechnikes,
- FIG. 4 schematically shows a spinning station (including winding) a nozzle spinning machine
- FIG. 5 schematically shows the main draft zone of the drafting system of FIG. 1, together with a thread handling device which is in a standby position,
- FIG. 7 shows the arrangement according to FIG. 5 shortly after the start of the depositing movement
- FIG. 1 the injector nozzle 1 of a nozzle spinning machine is shown in relation to the output rollers 2 and 3 of an apron drafting device, not shown.
- the lower roller 2 of the drafting system shown on the left is a stu-shaped steel cylinder, but can also be a steel cylinder running through, which extends in a known manner over several spinning positions of the spinning machine.
- the upper or pressure roller 3 is attached to a loading arm, not shown. It comprises a fixed axle 9 (FIG. 3) and a cylindrical hollow body 11 which is rotatably mounted on the axle 9 by means of bearings 8, 8 '.
- the body 11 is provided with a rubberized cover 4.
- a cone-like attachment 5 is fastened on the axis 9 by means of a screw 10.
- the attachment 5 has the shape of a truncated cone on the free end piece, as can be seen from FIG. 3.
- the frustoconical part of the attachment merges into a cylindrical part which adjoins the roller body 11 but does not touch it. This is secured by means of a fastening piece 12 from the attachment 5, which piece is connected to the axis 9 by the screw 10.
- the attachment 5 and the axis 9 could be formed from one piece.
- the transition zone 5 r of the frustoconical surface, where this merges into the cylindrical surface, is rounded.
- the tapered surface of the attachment could, however, have a rounded shape, for example a parabolic shape.
- the attachment 5 does not rotate with the pressure roller 3, but rather is screwed tightly to its axis, it is prevented that the yarn section 6, during the phase of the lateral deflection next to the drafting system, is subjected to an abrasive stress due to the rotating output rollers 2 and 3 is set.
- the larger outside diameter of the conical attachment 5 is at least the same size, but better is somewhat larger than the outside diameter of the adjoining part of the rubber coating 4 of the pressure roller 3.
- the arrangement allows the yarn section 6 to be stored at a certain time, i.e. the end of the thread can be Preparation processes are carried out at the right time at the location intended for the yarn connection, without there being an early connection with drawn fibers in the running drafting device.
- the attachment 5 described above is not only suitable for so-called apron drafting systems, but also for others, such as the so-called KEPA drafting system (compare the above-mentioned book by Wegener, page 315). can be applied. Since the attachment 5 is particularly easy to remove z, the printing rollers can still be easily replaced for maintenance work.
- Another possibility is the formation of the rotating part of the pressure roller 3 (e.g. the hollow body) with a side attachment 5;
- this solution is preferably dispensed with, since then, even with metallic, well-polished material, the abrasive stress mentioned above on the piece of yarn part 6 cannot be prevented.
- the manufacturing effort would be increased because, in order to prevent periodic yarn defects, the pressure roller 3 with the rubberized coating 4 should have increased concentricity. Compliance with these requirements is made more difficult by attaching an attachment.
- the 2 has a central area 4A with the diameter D and two end areas 4B, 4C with a smaller diameter dx, d 2 .
- the area 4B is adjacent to the article 5.
- the nip line of the delivery roller pair 2, 3 is formed between the roller 2 and the central region 4A of the coating.
- the largest diameter of the attachment 5 can be the same size as the diameter D of the central region 4A, ie it can protrude beyond the end region 4B.
- the spinning station u comprises a drafting system 40 with an input roller pair 37, a middle roller pair 38 (which is provided with straps) and a delivery roller pair 39.
- a condenser 3 is connected upstream of the input roller pair 37 and forms part of a sliver stop 38 according to EP 353 575.
- the elements in FIG. 4 are not shown realistically, but rather are shown separately from one another, so that the individual parts are easier to recognize.
- the drafting unit 40 is followed by a nozzle body 20, which can be designed, for example, according to DE 40 23 985 or EP 489 686.
- the yarn winding 50 comprises a distribution roller 44 and a bobbin bracket 46 which carries a cheese 48. Normally, a yarn spun through the body 20 is drawn off by a pair of draw-off rollers 42 and passed on to the winding 50 to form a bobbin.
- FIGS. 5 to 10 now show a re-piecing process in a spinning station according to FIG. 4 with a drafting system or a roller according to this invention.
- the nozzle body is indicated at 20, the delivery roller pair at 22.23 and the apron roller pair at 24.25.
- the straps are indicated at 26.27.
- the top or pressure roller 23 of the delivery roller pair has a "conical" attachment 28 according to the invention.
- the opening of the nozzle body in the vicinity of the drafting system is indicated by 21 in FIGS. 6, 8 and 10.
- the mouth of the suction nozzle is indicated at 29.
- the suction nozzle In the standby position (Fig. 5.6) the suction nozzle is located to the side of the Drafting system.
- the yarn section 6 extends from the nozzle body 20 laterally (viewed from above) almost parallel to the nip line of the delivery roller pair 22, 23 (FIG. 6) and is guided by the conical end part of the attachment 28.
- Figures 6, 8 and 10 are spatially distorted compared to the actual versions, because in these representations
- the attachment 28 is formed in such a way that the yarn section does not come into contact with any rotating part of the drafting system (in this phase). At this point the thread can be held without the thread being chafed by the rotating rollers or without creating an additional twist in the thread. In this case, the withdrawal of the thread from the suction nozzle can be initiated while it is being held in the standby position, specifically by the pair of take-off rollers 42 arranged downstream of the nozzle (FIG. 4). This pull keeps the thread taut.
- FIGS. 7 and 8 show an intermediate phase in which the suction nozzle 41 moves in the direction of the central plane of the drafting system.
- a loop S (FIG. 8) forms on the attachment 28.
- the thread still does not touch any of the rotating parts, so that the position is still “exactly” defined.
- the loop F is continuously “shortened” by the aforementioned deduction.
- the "apex" of this thread loop moves across the transition zone into the nip line of the pair of exit rollers.
- the loop is subsequently removed by conveying the thread from the suction nozzle 41 removed so that at the end of the depositing process the thread runs straight into the clamping line (Fig. 10).
- the transition of the thread from the attachment 28 to the pressure roller 23 is facilitated in that the end region 4 of the cover is also conical.
- the smallest diameter of the conical area 4D can be smaller than the diameter of the cylindrical part of attachment 28.
- the length or the design of the attachment 5 or 28 is to be selected such that, for a given position of the nozzle body 20, a yarn guided by the nozzle can extend over the attachment without a rotating part of the drafting device to touch.
- FIGS. 5 to 10 show that the yarn section 6 actually only touches a part of the conical surface, namely the part facing the roller 22.
- the part of this surface which is more distant from the roller 22 actually has no effect. This part would therefore not necessarily have to be formed with a thread guide surface, e.g. he would not have to rejuvenate.
- the attachment 28 is nevertheless preferably formed rotationally symmetrical, since it can then be attached to the axis or pressure roller without special attention to its angular position and also represents an inexpensive solution to the task.
- the movement of the suction nozzle 7 or 41 to the central plane of the drafting system is preferably carried out so quickly that the yarn loop F bridges the gap between the attachment 5 or 28 and the coating 4. This can prevent the yarn section 6 from getting caught in this gap.
- 11 to 16 three further variants are shown which show that the attachment does not have to be provided on the axis of the pressure roller. The already described parts of the variant according to FIGS. 5 to 10 are indicated in FIGS. 11 to 16 with the same reference numerals.
- the Aenderun deal exclusively with the essay and its bearer.
- the attachment of the attachment to the carrier is no longer within the pressure roller but on the surface of the attachment surface, which is not touched by the thread during the laying movement.
- the attachment 105 is carried by an arm 106, which is mounted on a service robot (not shown, but see e.g. EP 421 152) as an element of a handling device.
- a service robot not shown, but see e.g. EP 421 152
- the attachment 105 of the printing roller 3 can be advanced during an operating process.
- the attachment 105 can be provided with a book 107 (FIG. 12) which receives an end part of the axis 9. But this is not essential.
- the small gap S between the attachment 105 and the cover 4 can, as already described, be bridged by the movement of the suction nozzle 7 or 41.
- the attachment 105 only has to be provided once for all spinning stations operated by the service robot.
- the attachment 105 could be formed in one piece with the arm 106, but is preferably formed separately and on the arm 106 e.g. attached in area 108 (Fig. 12).
- FIGS. 13 and 14 shows an attachment 115 which is carried by an arm 116.
- the arm 116 is attached to the loading arm (not shown) of the drafting system.
- the Attachment can either be made from one piece with the arm 116 or attached to it.
- FIGS. 13 and 14 show a further variant, which differs from the embodiment according to FIGS. 13 and 14 only insofar as the support arm 117 is not on the loading arm of the drafting system but by means of a plate 118 on a part (not shown) of the Machine frame is attached near the Düsen ⁇ body.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3411/91 | 1991-11-21 | ||
CH3411/91A CH685123A5 (en) | 1991-11-21 | 1991-11-21 | Drafting system for a fine spinning machine, in particular a nozzle spinning machine. |
PCT/CH1992/000226 WO1993010291A1 (en) | 1991-11-21 | 1992-11-16 | Drawing unit for a fine-spinning machine, in particular a jet-spinning machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0568665A1 true EP0568665A1 (en) | 1993-11-10 |
EP0568665B1 EP0568665B1 (en) | 1996-06-05 |
Family
ID=4255408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92922973A Expired - Lifetime EP0568665B1 (en) | 1991-11-21 | 1992-11-16 | Drawing unit for a fine-spinning machine, in particular a jet-spinning machine |
Country Status (7)
Country | Link |
---|---|
US (1) | US5689945A (en) |
EP (1) | EP0568665B1 (en) |
JP (1) | JP3258009B2 (en) |
AT (1) | ATE138984T1 (en) |
CH (1) | CH685123A5 (en) |
DE (1) | DE59206498D1 (en) |
WO (1) | WO1993010291A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477591A (en) * | 1994-03-17 | 1995-12-26 | Hollingsworth Saco Lowell, Inc. | Bearing device for drafting rollers having pressure relieving means |
DE102006051875A1 (en) * | 2006-10-31 | 2008-05-08 | Maschinenfabrik Rieter Ag | Kepa drafting system for a spinning machine |
US10538865B2 (en) * | 2016-06-28 | 2020-01-21 | Loftex Usa Llc | Method for producing multi-hole ultra soft yarns |
DE102017222107B4 (en) * | 2017-12-07 | 2019-10-31 | Leoni Bordnetz-Systeme Gmbh | Method and device for producing a pipe |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1865440U (en) * | 1962-10-25 | 1963-01-10 | Baumwollspinnerei Speyer | TOP ROLLER FOR STRETCH PLANTS. |
DE3025032A1 (en) * | 1980-07-02 | 1982-01-21 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Top roller mounting for spinning frame drafting assembly - has spring-loaded saddle holding cantilevered roller |
JPS5959925A (en) * | 1982-09-28 | 1984-04-05 | Toyoda Autom Loom Works Ltd | Ending in bind spinning device |
DE3413894A1 (en) * | 1983-04-15 | 1984-10-25 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi | METHOD FOR MAKING A YARN |
IN161355B (en) * | 1983-07-01 | 1987-11-14 | Rieter Ag Maschf | |
JPS6215331A (en) * | 1985-06-27 | 1987-01-23 | Murata Mach Ltd | Air type spinning machine |
JPS6324128Y2 (en) * | 1985-08-12 | 1988-07-01 | ||
WO1987003310A1 (en) * | 1985-11-21 | 1987-06-04 | Schubert & Salzer Maschinenfabrik Aktiengesellscha | Process and device for rethreading a spinning device provided with a pneumatic twisting element |
DE3744757A1 (en) * | 1987-03-02 | 1989-01-05 | Schubert & Salzer Maschinen | Method and device for the piecing of a spinning apparatus working with a pneumatic twisting member |
US4918913A (en) * | 1987-06-12 | 1990-04-24 | Maschinenfabrik Rieter Ag | Method of, and device for, performing a start spinning operation for spinning of a yarn in a friction spinning apparatus |
IN171166B (en) * | 1987-10-08 | 1992-08-08 | Rieter Ag Maschf | |
EP0353575B1 (en) * | 1988-08-04 | 1995-03-08 | Maschinenfabrik Rieter Ag | Stopping device for a silver |
EP0361257A1 (en) * | 1988-09-29 | 1990-04-04 | Maschinenfabrik Rieter Ag | Delivery rollers for a drawing frame |
CH676860A5 (en) * | 1988-11-23 | 1991-03-15 | Rieter Ag Maschf | |
DE3932666C2 (en) * | 1989-03-22 | 2000-12-28 | Rieter Ag Maschf | Method for operating a spinning machine, in particular a ring spinning machine, and operating robots for carrying out the method |
US5138830A (en) * | 1989-07-04 | 1992-08-18 | Hans Stahlecker | Spinning machine having a plurality of drafting units |
DE3927739A1 (en) * | 1989-08-23 | 1991-02-28 | Fritz Stahlecker | METHOD AND DEVICE FOR WRAPPING SPIN |
CH679587A5 (en) * | 1989-08-25 | 1992-03-13 | Rieter Ag Maschf | |
CH679916A5 (en) * | 1989-10-03 | 1992-05-15 | Rieter Ag Maschf | |
JP2911593B2 (en) * | 1989-12-19 | 1999-06-23 | マシーネンフアブリーク・リーテル・アクチエンゲゼルシヤフト | Equipment for threading through openings in textile machinery |
CH683697A5 (en) * | 1990-07-20 | 1994-04-29 | Rieter Ag Maschf | Apparatus for automatically applying or piecing a yarn and method for its operation. |
CH682566A5 (en) * | 1990-12-06 | 1993-10-15 | Rieter Ag Maschf | Nozzle for swirl generation in a jet spinning machine. |
CH684836A5 (en) * | 1991-07-25 | 1995-01-13 | Rieter Ag Maschf | Method of controlling the workflows between a service machine and a spinning station of a textile machine. |
-
1991
- 1991-11-21 CH CH3411/91A patent/CH685123A5/en not_active IP Right Cessation
-
1992
- 1992-11-16 WO PCT/CH1992/000226 patent/WO1993010291A1/en active IP Right Grant
- 1992-11-16 JP JP50885093A patent/JP3258009B2/en not_active Expired - Fee Related
- 1992-11-16 AT AT92922973T patent/ATE138984T1/en active
- 1992-11-16 DE DE59206498T patent/DE59206498D1/en not_active Expired - Fee Related
- 1992-11-16 US US08/090,084 patent/US5689945A/en not_active Expired - Fee Related
- 1992-11-16 EP EP92922973A patent/EP0568665B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9310291A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0568665B1 (en) | 1996-06-05 |
US5689945A (en) | 1997-11-25 |
JPH06504594A (en) | 1994-05-26 |
DE59206498D1 (en) | 1996-07-11 |
JP3258009B2 (en) | 2002-02-18 |
ATE138984T1 (en) | 1996-06-15 |
CH685123A5 (en) | 1995-03-31 |
WO1993010291A1 (en) | 1993-05-27 |
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