EP0343201A1 - Falschdrallrolle - Google Patents
FalschdrallrolleInfo
- Publication number
- EP0343201A1 EP0343201A1 EP88908933A EP88908933A EP0343201A1 EP 0343201 A1 EP0343201 A1 EP 0343201A1 EP 88908933 A EP88908933 A EP 88908933A EP 88908933 A EP88908933 A EP 88908933A EP 0343201 A1 EP0343201 A1 EP 0343201A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- axis
- thread
- angle
- false twist
- 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
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/04—Devices for imparting false twist
- D02G1/08—Rollers or other friction causing elements
Definitions
- the invention relates to a false twist roller for false twisting of a running thread according to the preamble of claim 1.
- the false twist roller is used as a false twister in a false twist crimping machine for synthetic endless threads.
- the pitch angle of the thread on the roll is approximately equal to half the apex angle of the contact cone at the point of entry (point of run-up).
- the contact cone at the point of contact is therefore the cone whose generatrix is the tangent that is placed at the point of contact on the contour line of the roller, the point of contact, contour line and tangent lying in a single axial plane.
- the tangent lying in the axial plane is called axial tangent in the following.
- the tangent to the point of contact in the normal plane to the axis is called the circumferential tangent.
- the known false twist roll is preceded by thread guides to meet the specified condition.
- the optimal twisting conditions are predetermined by this assignment of the thread guides to the roll. It is not possible to change the swirl height while maintaining the optimal swirl conditions.
- the object of the invention is an embodiment of the false twist roller, in which the swirl height can be set as desired while maintaining the optimal swirl conditions.
- the solution is based on the knowledge that the angular condition, according to which the pitch angle of the yarn at the beginning of the line of contact with the rotating body is approximately equal to half the apex angle of the contact cone at the entry point (DE-A 24 60 031), is not the cause of an optimal one Operation of the false twist roller, but an automatically occurring consequence of the operation of the false twist roller.
- the position of the swiveling axis is matched to the contour of the roll so that in the thread run which is given as constant and unchangeable, the angle between the running thread and the circumferential tangent of the roll at the run-up point is equal to the contour cone angle (angle between the roller axis and the axial tangent of the contour line in the run-up point).
- the position of the swivel axis is determined for this by geometric construction, calculation and / or experiment.
- the contour is determined by geometric construction, calculation and / or experiment. This can be done in an axial plane of the roll lying surface line (contour line) can finally be approximated by a circular, parabolic, hyperbolic or otherwise mathematically ascertainable function.
- the invention creates a false twist roll
- Twist depends exclusively on the inclination of the roller.
- the invention makes it possible to provide the false twist rolls for a large number of threads on a joint swiveling holder, so that a joint setting is possible without having to provide different twist settings for the individual threads.
- a common drive of the rollers also contributes to this.
- Swivel axis may be set. Rather, when shaping the contour, the adhesive properties and gliding properties of the thread, which are required for optimum twisting, in relation to the surface of the false twist roller must be taken into account. Thus, the contour at the thicker end of the thread must not become so steep that the thread running up slips without any liability solely due to its thread tension. Therefore, the contour cone angle in the run-up area should in any case be smaller than the static friction angle of the thread relative to the false twist roller and larger than the sliding friction angle of the thread. On the other hand, the contour cone angle should be smaller than the sliding friction angle in the outlet area, and - as already mentioned - the end area of the roller can also be cylindrical. Likewise, the smallest and the largest diameter must be determined by experiment in such a way that an optimal swirling takes place. The selection of the position of the swivel axis has to be subordinate to these requirements.
- Fig. 4 embodiment of a false twist roller.
- the thread 3 runs from the supply spool 1.
- the supply spool 1 is attached to a holder.
- the thread is drawn off overhead by a thread guide 4 by means of the first delivery mechanism 5.
- the thread is then passed over a heating rail 6 and then a cooling rail 7.
- the thread guide 8 arranged upstream of the false twist roll 9 only serves to secure the thread run. No or only a small deflection takes place on it, so that the twist caused by the false twist roll does not jam on the thread guide 8. It is possible to provide a certain deflection on the thread guide.
- this deflection remains constant, however, if the swirl height (rotations per m) is changed by tilting the roller.
- the swirl build-up on the deflection, on the heater 6 and on the cooling rail 7 does not change.
- the thread wraps around the false twist roller 9 with a predetermined direction.
- the direction of twisting determines the twisting direction, the thread pattern on the roll corresponding to the thread pattern S or Z.
- the thread is drawn off from the false twist roll 9 by a second delivery mechanism 13, is moved back and forth by traversing 14 and is wound on spool 15 of the winding.
- the false twist roller 9 is mounted on the holder 10.
- the bracket 10 is pivotable about pivot axis 12.
- the false twist roller 9 is driven by a drive motor 11 with a constant speed, which is matched to the thread speed.
- Fig. 2 shows the view of the roller 9 with the thread 3. It is assumed that the thread 3 runs in a plane that is parallel to the paper plane. The thread then runs onto the roll at point A.
- Line 20 marks the Circumferential tangent of the roll to the run-up point A in the normal plane through point A to the roll (and at the same time the projection of this normal plane onto the paper plane).
- the thread path 3 forms the angle alpha with the circumferential tangent 20. This angle alpha is equal to the angle of inclination of the roller axis 17 to a plane perpendicularly intersecting the thread path and thus represents the inclination of the roller axis 17 with respect to the thread path.
- the axial or contour tangent 21 is the surface line of the contour cone, the cone axis of which is the roller axis 17.
- the roller is formed by rotating the contour line 22 about the roller axis 7.
- the contour line is convex with respect to the roller axis 17 and can be represented technically, for example, as a circular piece, hyperbolic piece, parabola piece or a similar mathematically ascertainable curve.
- the contour tangent 21 forms an angle gamma with the roller axis 17, which is referred to as contour cone angle in the context of this application.
- the contour line 22 ends at the end of the run in a straight line 17 that is parallel to the roller axis as continuously as possible.
- the outlet end 18 of the roll is therefore cylindrical.
- the thread path of the thread 3 running onto the false twist roller 9 is always adjusted in such a way that the angle of inclination alpha of the roller is equal to the contour cone angle gamma of the opening A.
- Fig. 3 the geometric construction of the contour line at a given pivot point 12, here designated D, is shown.
- the holder of the false twist roller is designated by reference 10.
- the zero position of the bracket is shown by a solid double line.
- the zero position of the axis 17 of the false twist roller is perpendicular to
- the thread path 3 is indicated by a solid line and perpendicularly intersects the zero position of the axis at point H.
- the position of the pivot point D and the thread path 3 are fixed. This results in the zero position of the axis and in the intersection with the thread run the desired run-up point A0, which according to the invention should lie on the cylindrical run-off end 18 of the false twist roll. In the zero position of the false twist roller, there is no swirl.
- Radius R0 can be specified so that optimal diameters are formed on the false twist roll for the twist. This specifies the first point U0 and the end of the contour line.
- the bracket 10 When the bracket 10 is pivoted by the angle alpha, the bracket assumes the position 10.1 indicated by a dashed double line. During this pivoting, the axis of the false twist roller has the correspondingly changed position 17.1 and the point H has the correspondingly changed position H1.
- the thread course 3 should not change due to the inclination of the roll.
- the point of contact of the thread on the roll when inclined with the angle of inclination alpha-] thus lies at point A1, the projection of which onto the paper plane represents the intersection of the unchanged thread path 3 with the pivoted axis 17.1.
- the axial tangents to the contour line in the run-up point A1 with the axis 17.1 form a contour cone angle gammai, which is equal to the angle of inclination of the roller and thus the swivel angle. angle is alpha].
- a line is therefore drawn through the first contour point U0 of the contour line which has the slope gamma] with respect to the zero position of the axis.
- the distance between H1 and A1 which is the axial position of the run-up point
- A1 represents, removed. This results in point A1 'on the zero position of the axis.
- the perpendicular is erected at point A1 '.
- the intersection of this perpendicular with the line that has the gradient gammai with respect to the axis is the further contour point U1.
- bracket 10 takes the position of the dashed double line 10.2, the roller axis the position 17.2 and the intersection H the position H2.
- the perpendiculars on the zero position of the "axis in the respective points A1 ', A2' each mean the radius R1 or R2 of the roller in the normal plane, the projection of which represents the respective verticals.
- the false twist roller receives an inconsistent contour line.
- a continuous contour line is created by fine-tuning the swivel angle. 4
- the roller is mounted in a holder 10 which is pivotable about the pivot point 12.
- the roller is driven by a motor 11.
- the pivot position of the roller can be determined by locking device 16 in the pivot slot 23 of the base plate 27 which is concentric with the pivot axis.
- the thread 3 comes from the cooling rail 7 and runs without deflection via thread guide 8 to the false twist roll 9.
- the false twist roller is axially displaceable on the holder 10 in the roller axis 17.
- the run-on point A can always be adapted to the thread path specified by line 3 at any swivel position.
- the axial displacement can be done by hand. However, it is also possible to automatically couple the axial displacement to the pivoting movement by means of a transmission gear.
- the holder 10 has the longitudinal groove 25.
- the longitudinal groove 25 has, as the section according to FIG. 4A shows, a dovetail shape.
- the guide rail 26, which is designed in the same way, is straight in the longitudinal groove.
- the top of the guide rail 26 protrudes from the longitudinal groove 25 so that the motor housing 1 i can be fastened to the top of the guide rail 26 with the false twist roller.
- a threaded hole is made at the level of the swivel slot 23 in the underside of the holder 10 facing the base plate 27. In this threaded hole, an adjusting screw 28 is screwed, which is provided with a knurled head.
- the guide bar 26 can be clamped in the longitudinal groove 25, thereby fixing any desired axial position of the false twist roller.
- the adjusting screw protrudes from the swivel slot so that a special setting is possible in each swivel position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Treatment Of Fiber Materials (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3735942 | 1987-10-23 | ||
DE19873735942 DE3735942A1 (de) | 1987-10-23 | 1987-10-23 | Falschdrallrolle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0343201A1 true EP0343201A1 (de) | 1989-11-29 |
EP0343201B1 EP0343201B1 (de) | 1991-12-18 |
Family
ID=6338961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88908933A Expired - Lifetime EP0343201B1 (de) | 1987-10-23 | 1988-10-16 | Falschdrallrolle |
Country Status (5)
Country | Link |
---|---|
US (1) | US4956970A (de) |
EP (1) | EP0343201B1 (de) |
JP (1) | JPH02501756A (de) |
DE (2) | DE3735942A1 (de) |
WO (1) | WO1989003905A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2580316B2 (ja) * | 1989-02-13 | 1997-02-12 | 村田機械株式会社 | 糸の仮撚方法及びその仮撚装置 |
JPH03128674U (de) * | 1990-04-09 | 1991-12-25 | ||
DE19500189B4 (de) * | 1995-01-05 | 2006-09-14 | Rieter Ingolstadt Spinnereimaschinenbau Ag | Verfahren zur Anpressung eines Tastorgans an einen Faserverband in einer Bandführung und Vorrichtung zu deren Erzeugung |
USD827682S1 (en) * | 2016-12-02 | 2018-09-04 | Carpet Industry Clearinghouse, Inc. | False twist block assembly |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH426090A (de) * | 1964-02-26 | 1966-12-15 | Hoechst Ag | Verfahren zur Herstellung gekräuselter Fäden |
GB1185684A (en) * | 1967-05-18 | 1970-03-25 | Turbo Machine Co | Apparatus and Method for Producing Twist in Yarn |
DE1660654A1 (de) * | 1967-06-20 | 1972-04-20 | Turbo Machine Co | Verfahren und Vorrichtung zum Falschzwirnen von Garnen |
US3495390A (en) * | 1968-06-20 | 1970-02-17 | Stevens & Co Inc J P | False twisting method and apparatus |
US3559391A (en) * | 1968-06-28 | 1971-02-02 | American Enka Corp | Production of torque yarn |
BE754695A (fr) * | 1969-10-27 | 1971-01-18 | Glanzstoff Ag | Dispositif servant a donner une fausse torsion aux monofilaments ou auxfiles sans fin |
US3735575A (en) * | 1970-12-23 | 1973-05-29 | S Hattori | Spinning apparatus for continuous operation |
CH567114A5 (de) * | 1973-12-31 | 1975-09-30 | Gehring Rudolf | |
CH609821GA3 (de) * | 1975-09-26 | 1979-03-30 | ||
DE2854378A1 (de) * | 1978-01-12 | 1979-07-19 | Heberlein & Co Ag | Vorrichtung zur texturierung von textilgarnen aus thermoplastischem material durch friktions-falschdrallerteilung |
CH626665A5 (de) * | 1978-03-03 | 1981-11-30 | Rieter Ag Maschf | |
DE2931718A1 (de) * | 1979-08-04 | 1981-02-19 | Barmag Barmer Maschf | Verfahren zum anfahren eines friktionsfalschdrallers |
US4562694A (en) * | 1983-07-07 | 1986-01-07 | Sumar Cesar P | Device for attachment to drawtwister machines to produce multifilament yarns with S or Z twist effect |
-
1987
- 1987-10-23 DE DE19873735942 patent/DE3735942A1/de not_active Withdrawn
-
1988
- 1988-10-16 US US07/360,884 patent/US4956970A/en not_active Expired - Fee Related
- 1988-10-16 WO PCT/DE1988/000637 patent/WO1989003905A1/de active IP Right Grant
- 1988-10-16 JP JP63508123A patent/JPH02501756A/ja active Pending
- 1988-10-16 EP EP88908933A patent/EP0343201B1/de not_active Expired - Lifetime
- 1988-10-16 DE DE8888908933T patent/DE3867063D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8903905A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0343201B1 (de) | 1991-12-18 |
DE3867063D1 (de) | 1992-01-30 |
DE3735942A1 (de) | 1989-05-03 |
WO1989003905A1 (en) | 1989-05-05 |
US4956970A (en) | 1990-09-18 |
JPH02501756A (ja) | 1990-06-14 |
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