EP0562075B1 - Device for spin-drawing thermoplastic filament yarns - Google Patents

Device for spin-drawing thermoplastic filament yarns Download PDF

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Publication number
EP0562075B1
EP0562075B1 EP92920356A EP92920356A EP0562075B1 EP 0562075 B1 EP0562075 B1 EP 0562075B1 EP 92920356 A EP92920356 A EP 92920356A EP 92920356 A EP92920356 A EP 92920356A EP 0562075 B1 EP0562075 B1 EP 0562075B1
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EP
European Patent Office
Prior art keywords
godet
rotation
thread
filament yarns
godets
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EP92920356A
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German (de)
French (fr)
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EP0562075A1 (en
Inventor
Hans Linz
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Viscosuisse SA
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Rhone Poulenc Viscosuisse SA
Societe de la Viscose Suisse SA
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch

Definitions

  • the invention relates to a device for spinning of at least two thermoplastic filament yarns on at least two godet duos, each consisting of two rotatable. Godets, of which at least one godet is driven and whose axes of rotation lie skewed to one another and are arranged such that the axis of rotation of one godet is pivotally arranged within one plane and forms an intersection angle ⁇ with the parallel to the non-pivotable axis of rotation and this plane with another Plane that is determined by the non-pivotable axis of rotation and the center of the pivotable axis of rotation and forms an intersection angle.
  • thermoplastic filament yarns such as polyesters, polyamides and the like
  • generic stretching devices with two or more roller or godet duos are used (DE-A-1 907 782).
  • the axes of rotation of the rolls within the godet duo units are slightly inclined towards each other to produce a certain winding pitch of the thread.
  • the two axes of rotation lie within a common plane. Any necessary change in the winding pitch can be easily made by changing the angle that the two axes of rotation form with one another.
  • the object of the invention is to provide a device for spinning of two or more filament yarns, which ensures the maintenance of a sufficient spatial separation between the individual yarn wraps on the godet duos.
  • intersection angle ⁇ formed between the two planes is 10 ° -60 °.
  • the axes of the godets belonging to a godet duo are arranged so that they can be pivoted relative to one another in such a way that the pivoting plane of a godet axis with the plane of connection of the godet axes, which contains both the center point of this axis and the other godet axis, forms the intersection angle ⁇ .
  • a working width of the godets from 250 mm to 400 mm, in particular from 250 mm to 350 mm, has the advantage that several threads can be treated at the same time and several turns can be placed on the godet duo. Such large working widths can only be meaningfully exploited using the arrangement of the axes of rotation of the godets according to the invention
  • reference numerals 1 to 1 ' represent a first godet of two godet duos.
  • the second godet of the godet duo is labeled 2 to 2 '.
  • a filament yarn 3 is passed over the godet duos 1, 2 and 1 ', 2'.
  • Peg pairs 4-4 'and 5-5' are provided for pivoting suspension of the godets in the drafting system.
  • FIG. 2 the godet duos 1, 2; 1 ', 2' shown in side view, wherein only the godet 1 of the godet duo 1, 2 and the godet 1 'of the godet duo 1', 2 'are visible.
  • a filament yarn group 3 consisting of the filament yarns 3 ', 3'',3''' and 3 '''', is placed on the godet 1 coming from below and leaves the godet 1 'after each winding of the two godet duos five times.
  • B o means the width of the thread sheet when entering gallet 1,
  • B1 the width of the thread sheet when leaving the godet 1 and B2 the width of the thread group when leaving the godet 2.
  • Galette 1 is rotatably mounted about an axis of rotation 7.
  • Galette 2 is rotatably mounted about an axis of rotation 8.
  • the axes of rotation 7 and 8 are skew to each other, i.e. they also have no intersection in their extension.
  • a plane 10 is determined by the axis of rotation 7 and the center 9 of the axis of rotation 8.
  • the parallel 11 to the axis of rotation 7 through the center 9 is the intersection between the plane 10 and a plane 12.
  • the two planes 10 and 12 intersect at an angle ⁇ below. Within the plane 12, the axis of rotation 8 forms an intersection angle ⁇ with the parallel 11.
  • the godets 1 and 1 'and 2 and 2' are pivotably mounted on a pair of pins 4 and 4 'and 5 and 5'.
  • the pairs of pins 4 and 4 'and 5 and 5' are arranged with each other but not parallel to each other. It is thereby achieved that the pivoting planes of the godets 1 and 1 'form an intersection angle with the connecting planes. This could be achieved just as well by vertically displacing the godets belonging to a godet duo. A vertical arrangement of the godets would significantly increase the overall height of the machine and would make it disproportionately difficult to operate.
  • the suspension of the godets shown on pairs of pins is exemplary and only one of the possible technical solutions for realizing the invention.
  • the spatial orientation of the axes of rotation of the godets relative to one another is essential for the invention.
  • the family of threads consisting of the four filament yarns 3 ', 3' '3' '' and 3 '' '' running parallel to each other, runs from the bottom near the drive-side edge on the godet 1 from the godet duo 1, 2 on. She loops around the godet duo 1.2 five times, with all threads being laid close to the free right edge of the godet according to the winding pitch created with the invisible godet 2. Then the threads of the thread group 3 of the godet 1 'of the godet duo 1', 2 'are fed, which is looped five times in the same way.
  • the representation of four filament yarns is to be understood as an example and without limitation.
  • the problem solved according to the invention applies analogously to each thread count greater than or equal to two.
  • the lines shown only indicate the zones on the godet circumference on which the filament yarns 3 '3' ', 3' '' and 3 '' '' are positioned.
  • the lateral extent of the filament yarns is not shown.
  • the outer of the four filament yarns 3 'and 3' ''' 'shown are drawn more strongly than the inner filament yarns 3' 'and 3' ''.
  • the axis of rotation of the second godet is pivoted relative to the first one in such a way that the desired winding pitch of the filament yarns is achieved.
  • the decrease in the winding pitch along the godet axis from the run-up zone to the run-off zone can be clearly seen.
  • the original total width B0 present at the inlet of the thread sheet 3 is reduced to the width B1 at the outlet.
  • the width of the thread sheet 3 is to be understood as the center of gravity of the first and last of the filament yarns passed over the roller duo.
  • B1 there represents the inlet width of the thread sheet. It is reduced on the way over the second godet duo in the same way to the width B2 as before the inlet width B0 on B1.
  • the axis of rotation of the godet 1 is oriented skew to the axis of rotation of the godet 2 within the plane 12.
  • the intersection angle ⁇ between levels 10 and 12 is 90 °.
  • the godet duo 1.2 is wrapped eight times around a thread.
  • the winding pitch between the individual wraps increases on the godet duo 1,2 from the casserole to the drain from 30.5 mm by 4 mm to 26.5 mm.
  • the turn gradient as a function of the axis coordinate is shown graphically in FIG. 4, curve a.
  • the godet arrangement according to Example 1 is modified such that the cutting angle between plane 10 and plane 12 is 35 °.
  • the decrease in the winding pitch along the godet axis is less than 1 mm.
  • the turn gradient as a function of the axis coordinate is shown graphically in FIG. 4, curve b.
  • a godet duo as in Example 1 is wrapped five times over its entire working width by four filament yarns.
  • the pitch of the first thread winding of the first thread is 77 mm.
  • This results in a separation efficiency SW of 0.41 ie the original width of the thread sheet is reduced to 41%.
  • Two rotating godets 300 mm in length and 190 mm in diameter are wrapped five times by four filament yarns as in Example 3.
  • the axes of the two godets are not skew to one another, but lie within one plane, ie planes 10 and 12 are coplanar, the intersection angle ⁇ is 0.
  • the winding pitch of the first thread winding of the first thread is 58 mm.
  • Two rotating godets 300 mm in length and 190 mm in diameter are looped five times over their entire working width as in Example 3 by four filament yarns.
  • the axes of the two godets are skew to each other. Their mutual orientation is varied in such a way that the intersection angle between planes 10 and 12 takes on different values between 10 ° and 80 °.
  • the influence of the cutting angle ⁇ on the width of the thread sheet B0 at the inlet and B1 at the outlet of the godet duo was determined and the degree of separation SW was calculated.
  • Table 1 together with those of Examples 3 and 4. It can be seen from this that the values for the degree of separation SW do not change monotonically with the cutting angle, but run through a maximum. This curve is shown graphically in FIG. 5, curve a.
  • the separation effect SW depends in a non-monotonous manner on the angle ⁇ of the suspension of the godet duo.
  • an angle range of 10 ° ⁇ ⁇ 60 60 ° was found in the investigations, within which the separation effect SW runs through a maximum.
  • the resulting distance between threads with a width of 5 mm after the passage of four godet duos is at least twice as large as known.
  • the higher level of operational safety achieved thereby results in a better guarantee of the quality of the filament yarn produced, and on the other hand it enables or at least facilitates the transition to the simultaneous treatment of two or more threads.
  • the result is a significant increase in the productivity of the spin-stretching process compared to the one-end process.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The invention concerns a device for the multi-end spin-drawing of thermoplastic filament yarns on at least two two-high galettes (1, 2 and 1', 2') mounted with their axes of rotation (7 and 8) skew with respect to each other such that the axis of rotation (8) of one galette (2) can pivot in a plane (12) which makes an angle (β) of 10° to 60° with another plane (10). The device proposed by the invention makes it possible for the first time to spin and draw simultaneously on several ends.

Description

Die Erfindung betrifft eine Vorrichtung zum Spinnstrecken von wenigstens zwei thermoplastischen Filamentgarnen auf wenigstens zwei Galettenduos, bestehend aus je zwei rotierbaren. Galetten, von denen wenigstens eine Galette angetrieben ist und deren Rotationsachsen windschief zueinander liegen und so angeordnet sind, dass die Rotationsachse der einen Galette innerhalb einer Ebene schwenkbar angeordnet ist und mit der Parallelen zur nicht schwenkbaren Rotationsachse einen Schnittwinkel α bildet und diese Ebene mit einer weiteren Ebene, die durch die nicht schwenkbare Rotationsachse und den Mittelpunkt der schwenkbaren Rotationsachse bestimmt ist und einen Schnittwinkel bildet.The invention relates to a device for spinning of at least two thermoplastic filament yarns on at least two godet duos, each consisting of two rotatable. Godets, of which at least one godet is driven and whose axes of rotation lie skewed to one another and are arranged such that the axis of rotation of one godet is pivotally arranged within one plane and forms an intersection angle α with the parallel to the non-pivotable axis of rotation and this plane with another Plane that is determined by the non-pivotable axis of rotation and the center of the pivotable axis of rotation and forms an intersection angle.

Zum Spinnstrecken von thermoplastischen Filamentgarnen wie Polyestern, Polyamiden und dergleichen, verwendet man gattungsgemäße Streckeinrichtungen mit zwei oder mehr Rollen- oder Galettenduos (DE-A-1 907 782). Die Rotationsachsen der Rollen innerhalb der Galettenduoeinheiten sind leicht gegeneinander geneigt zur Erzeugung einer bestimmten Windungssteigung des aufgelegten Fadens. Demzufolge liegen die beiden Rotationsachsen innerhalb einer gemeinsamen Ebene. Eine allfällig erforderliche Veränderung der Windungssteigung kann dadurch leicht vorgenommen werden, dass man den Winkel, den die beiden Rotationsachsen miteinander bilden, verändert.For the spinning of thermoplastic filament yarns such as polyesters, polyamides and the like, generic stretching devices with two or more roller or godet duos are used (DE-A-1 907 782). The axes of rotation of the rolls within the godet duo units are slightly inclined towards each other to produce a certain winding pitch of the thread. As a result, the two axes of rotation lie within a common plane. Any necessary change in the winding pitch can be easily made by changing the angle that the two axes of rotation form with one another.

Es ist auch bekannt, dass bei einem Galettenduo die Rotationsachsen der beiden Galetten innerhalb von zwei verschiedenen Ebenen geschwenkt werden können, welche parallel zueinander senkrecht auf der Verbindungslinie der Galettenachsen stehen.It is also known that in a godet duo the axes of rotation of the two godets can be pivoted within two different planes, which stand parallel to each other perpendicular to the connecting line of the godet axes.

Es hat sich gezeigt, dass weder die eine noch die andere der beschriebenen Achsanordnungen optimal für das Spinnstrecken von mehr als einem Faden gleichzeitig ist.It has been shown that neither one of the described axis arrangements is optimal for the spinning stretching of more than one thread at the same time.

Es wurde gefunden, dass die Windungssteigung der Fadenumschlingungen auf einem Rollenduo umso geringer wird, je weiter das Filamentgarn zum vorderen, freien Ende der Rollen hin aufgelegt ist. Im Falle der Behandlung von nur einem Filamentgarn auf einem Spinnstreckwerk ist dies nicht von Bedeutung. Bei der Behandlung von zwei oder mehr Filamentgarnen gleichzeitig findet eine systematische Reduktion der Abstände zwischen den parallel nebeneinander auf das Galettenduo aufgelegten Fadenumschlingungen statt. Diese Reduktion pflanzt sich auf jedem nachgeschalteten Galettenduo fort, so dass bei der Verwendung von drei oder mehr Galettenduos die Abstände zwischen den Filamentgarnen so gering werden, dass sie nicht mehr oder nicht mehr hinreichend sicher voneinander getrennt werden können. Beim Spinnstrecken von Multifilamenten kann es ausserdem vorkommen, dass einzelne Fibrillen aus einem Filamentgarn zum Nachbarfilamentgarn hinüberwechseln; dadurch werden Differenzen im Titer der so gleichzeitig erzeugten Filamentgarne verursacht. Ebenso werden dadurch Fibrillen- oder Fadenbrüche auf dem Streckwerk ausgelöst, was sowohl die Filamentgarnqualität als auch die Wirtschaftlichkeit des Prozesses beeinflusst.It has been found that the more the filament yarn is laid towards the front, free end of the rolls, the smaller the twist pitch of the thread wraps on a pair of rolls. This is not important in the case of treating only one filament yarn on a spinning drafting system. When treating two or more filament yarns at the same time, there is a systematic reduction in the distances between the thread wraps placed parallel to one another on the godet duo. This reduction propagates on every downstream godet duo, so that when three or more godet duos are used, the distances between the filament yarns become so small that they can no longer be separated from one another with sufficient certainty. When spinning multifilaments, it can also happen that individual fibrils change from one filament yarn to the neighboring filament yarn; this causes differences in the titer of the filament yarns thus produced at the same time. It also triggers fibril or thread breaks on the drafting system, which affects both the quality of the filament yarn and the economy of the process.

Aufgabe der Erfindung ist es, eine Vorrichtung zum Spinnstrecken von zwei oder mehreren Filamentgarnen zur Verfügung zustellen, welche die Aufrechterhaltung einer ausreichenden räumlichen Trennung zwischen den einzelnen Garnumschlingungen auf den Galettenduos gewährleistet.The object of the invention is to provide a device for spinning of two or more filament yarns, which ensures the maintenance of a sufficient spatial separation between the individual yarn wraps on the godet duos.

Die Aufgabe wird erfindungsgemäss dadurch gelöst, dass der Zwischen den beiden Ebenen gebildete Schnittwinkel β 10°-60° beträgt.The object is achieved according to the invention in that the intersection angle β formed between the two planes is 10 ° -60 °.

Es werden die Achsen der jeweils zu einem Galettenduo gehörenden Galetten so gegeneinander schwenkbar angeordnet, dass die Schwenkebene einer Galettenachse mit der Verbindungsebene der Galettenachsen, die sowohl den Mittelpunkt dieser Achse als auch die andere Galettenachse enthält, den Schnittwinkel β bildet.The axes of the godets belonging to a godet duo are arranged so that they can be pivoted relative to one another in such a way that the pivoting plane of a godet axis with the plane of connection of the godet axes, which contains both the center point of this axis and the other godet axis, forms the intersection angle β.

Es hat sich gezeigt, dass die Abnahme der Windungssteigung von der Wahl des Schnittwinkels β abhängig ist. Werden die Galetten so angeordnet, dass die Schwenkebenen ihrer Achsen senkrecht auf der Verbindungsebene, Schnittwinkel β = 90°, stehen, so ist diese Abnahme wesentlich stärker ausgeprägt, als wenn die Galettenachsen innerhalb der gemeinsamen Verbindungseben schwenkbar angeordnet sind. Jedoch ist die Abnahme der Windungssteigung überraschender Weise nicht monoton, sondern durchläuft ein Minimum.It has been shown that the decrease in the winding pitch depends on the choice of the cutting angle β. If the godets are arranged in such a way that the swivel planes of their axes are perpendicular to the connection plane, intersection angle β = 90 °, this decrease is much more pronounced than if the godet axes are pivotably arranged within the common connection planes. However, the decrease in the winding pitch is surprisingly not monotonous, but goes through a minimum.

Es ist zweckmässig, innerhalb eines mehrstufigen Streckwerks mit mehr als zwei Galettenduos alle Galettenduos so anzuordnen, dass eine ausreichende räumliche Trennung der Fadenumwindungen gewährleistet ist.It is advisable to arrange all godet duos within a multi-stage drafting system with more than two godet duos in such a way that a sufficient spatial separation of the thread wraps is ensured.

Eine Arbeitsbreite der Galetten von 250 mm bis 400 mm, insbesondere von 250 mmm bis 350 mm, hat den Vorteil, dass man mehrere Fäden gleichzeitig behandeln und mehrere Umwindungen auf das Galettenduo auflegen kann. So grosse Arbeitsbreiten können nur unter Verwendung der erfindungsgemässen Anordnung der Rotationsachsen der Galetten sinnvoll ausgenutzt werdenA working width of the godets from 250 mm to 400 mm, in particular from 250 mm to 350 mm, has the advantage that several threads can be treated at the same time and several turns can be placed on the godet duo. Such large working widths can only be meaningfully exploited using the arrangement of the axes of rotation of the godets according to the invention

Die Erfindung soll anhand von Zeichnungen näher beschrieben werden.The invention will be described in more detail with reference to drawings.

Es zeigen:

Fig. 1
die erfindungsgemässe Anordnung der Galetten in einem Streckwerk
Fig. 2
eine Seitenansicht zweier Galettenduos mit Fadenlauf
Fig. 3
eine räumliche Darstellung der erfindungsgemässen Achsenanordnung
Fig. 4
eine graphische Darstellung der Windungssteigungen auf einem Galettenduo in Abhängigkeit von der Achskoordinate und dem Winkel β.
Fig. 5
eine graphische Darstellung der Abhängigkeit des Separationsfaktors und des resultierenden Abstands zwischen den Fäden vom Winkel β
Show it:
Fig. 1
the arrangement of the godets according to the invention in a drafting system
Fig. 2
a side view of two godet duos with thread running
Fig. 3
a spatial representation of the axis arrangement according to the invention
Fig. 4
a graphical representation of the winding slopes on a godet duo as a function of the axis coordinate and the angle β.
Fig. 5
a graphical representation of the dependence of the separation factor and the resulting distance between the threads on the angle β

In Fig. 1 ist mit dem Bezugszeichen 1 bis 1' eine erste Galette von zwei Galettenduos dargestellt. Die zweite Galette der Galettenduos ist mit 2 bis 2' bezeichnet. Ein Filamentgarn 3 wird über die Galettenduos 1, 2 und 1', 2' geführt. Zapfenpaare 4-4' und 5-5' sind zur schwenkbaren Aufhängung der Galetten im Streckwerk vorgesehen.In Fig. 1, reference numerals 1 to 1 'represent a first godet of two godet duos. The second godet of the godet duo is labeled 2 to 2 '. A filament yarn 3 is passed over the godet duos 1, 2 and 1 ', 2'. Peg pairs 4-4 'and 5-5' are provided for pivoting suspension of the godets in the drafting system.

In Fig. 2 sind die Galettenduos 1, 2; 1', 2' in Seitenansicht dargestellt, wobei nur die Galette 1 des Galettenduos 1,2 und die Galette 1' des Galettenduos 1', 2' sichtbar sind. Eine Filamentgarnschar 3, bestehend aus den Filamentgarnen 3', 3'',3''' und 3'''', ist auf der Galette 1 von unten kommend aufgelegt und verlässt nach jeweils fünffacher Umschlingung beider Galettenduos die Galette 1'. Bo bedeutet die Breite der Fadenschar beim Einlauf auf die Gallete 1, B₁ die Breite der Fadenschar beim Verlassen der Galette 1 und B₂ die Breite der Fadenschar beim Verlassen der Galette 2.In Fig. 2, the godet duos 1, 2; 1 ', 2' shown in side view, wherein only the godet 1 of the godet duo 1, 2 and the godet 1 'of the godet duo 1', 2 'are visible. A filament yarn group 3, consisting of the filament yarns 3 ', 3'',3''' and 3 '''', is placed on the godet 1 coming from below and leaves the godet 1 'after each winding of the two godet duos five times. B o means the width of the thread sheet when entering gallet 1, B₁ the width of the thread sheet when leaving the godet 1 and B₂ the width of the thread group when leaving the godet 2.

In Fig. 3 sind dreidimensional die Galetten 1 und 2 dargestellt. Galette 1 ist um eine Rotationsachse 7 drehbar gelagert. Galette 2 ist um eine Rotationsachse 8 drehbar gelagert. Die Rotationsachsen 7 und 8 stehen windschief zueinander, d.h. sie haben auch in ihrer Verlängerung keinen Schnittpunkt. Durch die Rotationsachse 7 und den Mittelpunkt 9 der Rotationsachse 8 ist eine Ebene 10 bestimmt. Die Parallele 11 zur Rotationsachse 7 durch den Mittelpunkt 9 ist die Schnittlinie zwischen der Ebene 10 und einer Ebene 12. Die beiden Ebenen 10 und 12 schneiden sich untere einem Winkel β. Innerhalb der Ebene 12 bildet die Rotationsachse 8 mit der Parallelen 11 einen Schnittwinkel α.3, the godets 1 and 2 are shown three-dimensionally. Galette 1 is rotatably mounted about an axis of rotation 7. Galette 2 is rotatably mounted about an axis of rotation 8. The axes of rotation 7 and 8 are skew to each other, i.e. they also have no intersection in their extension. A plane 10 is determined by the axis of rotation 7 and the center 9 of the axis of rotation 8. The parallel 11 to the axis of rotation 7 through the center 9 is the intersection between the plane 10 and a plane 12. The two planes 10 and 12 intersect at an angle β below. Within the plane 12, the axis of rotation 8 forms an intersection angle α with the parallel 11.

Im Betrieb sind die jeweils zu einem Galettenduo zusammengefassten Galetten 1 und 1' und 2 und 2'auf einem Zapfenpaar 4 und 4' und 5 und 5' schwenkbar gelagert. Die Zapfenpaare 4 und 4' und 5 und 5' sind zwar untereinander aber nicht zueinander parallel angeordnet. Dadurch wird erreicht, dass die Schwenkebenen der Galetten 1 und 1' mit den Verbindungsebenen einen Schnittwinkel bilden. Dieses liese sich ebenso gut dadurch erreichen, dass man die jeweils zu einem Galettenduo zusammengehörigen Galetten senkrecht gegeneinander versetzt. Eine senkrecht gegeneinander versetzte Anordnung der Galetten würde die Bauhöhe der Maschine wesentlich vergrössern und deren Bedienung unverhältnismässig erschweren. Die dargestellte Aufhängung der Galetten auf Zapfenpaaren ist beispielhaft und nur eine der möglichen technischen Lösungen zur Realisierung der Erfindung. Wesentlich für die Erfindung ist die räumliche Orientierung der Rotationsachsen der Galetten gegeneinander.In operation, the godets 1 and 1 'and 2 and 2', each combined to form a pair of godets, are pivotably mounted on a pair of pins 4 and 4 'and 5 and 5'. The pairs of pins 4 and 4 'and 5 and 5' are arranged with each other but not parallel to each other. It is thereby achieved that the pivoting planes of the godets 1 and 1 'form an intersection angle with the connecting planes. This could be achieved just as well by vertically displacing the godets belonging to a godet duo. A vertical arrangement of the godets would significantly increase the overall height of the machine and would make it disproportionately difficult to operate. The suspension of the godets shown on pairs of pins is exemplary and only one of the possible technical solutions for realizing the invention. The spatial orientation of the axes of rotation of the godets relative to one another is essential for the invention.

Die Fadenschar 3, von einem nicht gezeigten Lieferwerk kommend, läuft senkrecht von unten auf die Galette 1 auf. Nach einer oder mehreren Umschlingungen verlässt die Fadenschar 3 das Galettenduo 1,2 wieder von der Galette 1 aus und trifft bei der Galette 1' auf das Galettenduo 1',2' auf, welches ebenfalls einfach oder mehrfach umschlungen wird. Danach kann die Filamentgarn Fadenschar 3 entweder einem oder mehreren weiteren Galettenduos oder direkt einer Aufspuleinrichtung zugeführt werden.The thread sheet 3, coming from a delivery plant, not shown, runs vertically onto the godet 1 from below. After one or more loops, the thread group 3 leaves the godet duo 1, 2 again from the godet 1 and strikes the godet duo 1 ', 2' in the godet 1 ', which is also wrapped once or several times. Then the filament yarn 3 can be fed either to one or more further godet duos or directly to a winding device.

In Figur 2 läuft die Fadenschar, bestehend aus den vier zueinander parallel geführten Filamentgarnen, 3', 3'' 3''' und 3'''' von unten kommend, in der Nähe des antriebseitigen Randes auf der Galette 1 vom Galettenduo 1,2 auf. Sie umschlingt das Galettenduo 1,2 fünfmal, wobei alle Fäden entsprechend der mit der nicht sichtbaren Galette 2 erzeugten Windungssteigung bis in die Nähe des freien rechten Galettenrandes verlegt werden. Danach werden die Fäden der Fadenschar 3 der Galette 1' des Galettenduos 1',2'zugeführt, welches auf gleiche Weise fünffach umschlungen wird.In FIG. 2, the family of threads, consisting of the four filament yarns 3 ', 3' '3' '' and 3 '' '' running parallel to each other, runs from the bottom near the drive-side edge on the godet 1 from the godet duo 1, 2 on. She loops around the godet duo 1.2 five times, with all threads being laid close to the free right edge of the godet according to the winding pitch created with the invisible godet 2. Then the threads of the thread group 3 of the godet 1 'of the godet duo 1', 2 'are fed, which is looped five times in the same way.

Die Darstellung von vier Filamentgarnen ist beispielhaft und ohne Beschränkung zu verstehen. Die erfindungsgemäss gelöste Aufgabe gilt sinngemäss für jede Fadenzahl grösser oder gleich zwei. Die dargestellten Linien geben lediglich die Zonen auf dem Galettenumfang an, auf welchen die Filamentgarne 3' 3'', 3''' und 3'''' positioniert sind. Die laterale Ausdehnung der Filamentgarne ist nicht dargestellt. Lediglich der Deutlichkeit wegen sind die äusseren der vier gezeigten Filamentgarne 3' und 3'''' stärker gezeichnet als die inneren Filamentgarne 3'' und 3'''.The representation of four filament yarns is to be understood as an example and without limitation. The problem solved according to the invention applies analogously to each thread count greater than or equal to two. The lines shown only indicate the zones on the godet circumference on which the filament yarns 3 '3' ', 3' '' and 3 '' '' are positioned. The lateral extent of the filament yarns is not shown. For clarity only, the outer of the four filament yarns 3 'and 3' '' 'shown are drawn more strongly than the inner filament yarns 3' 'and 3' ''.

Die Rotationsachse der nicht gezeigten zweiten Galette ist so gegenüber der ersten geschwenkt, dass die gewünschte Windungssteigung der Filamentgarne erreicht wird. Die Abnahme der Windungssteigung längs der Galettenachse von Auflaufzone zur Ablaufzone ist deutlich zu erkennen. Die ursprüngliche am Einlauf vorliegende Gesamtbreite B₀ der Fadenschar 3 reduziert sich auf die Breite B₁ am Ablauf. Unter der Breite der Fadenschar 3 ist der Schwerpunktsabstand des ersten und letzten der über das Rollenduo geführten Filamentgarne zu verstehen. Das arithmetische Verhältnis B₁/B₀ = SW sei im folgenden Separationswirkungsgrad genannt. Diese Kenngrösse stellt ein Mass für die relative Abnahme der Breite der Filamentgarn Fadenschar 3 innerhalb eines Streckrollenduos dar.The axis of rotation of the second godet, not shown, is pivoted relative to the first one in such a way that the desired winding pitch of the filament yarns is achieved. The decrease in the winding pitch along the godet axis from the run-up zone to the run-off zone can be clearly seen. The original total width B₀ present at the inlet of the thread sheet 3 is reduced to the width B₁ at the outlet. The width of the thread sheet 3 is to be understood as the center of gravity of the first and last of the filament yarns passed over the roller duo. The arithmetic ratio B₁ / B₀ = SW is called separation efficiency in the following. This parameter represents a measure of the relative decrease in the width of the filament yarn thread group 3 within a drawing roller duo.

Es hat sich gezeigt, dass dem Separationswirkungsgrad eine zentrale Bedeutung zukommt. Führt man nämlich die Fadenschar 3 in der gleichen Weise über ein zweites Galettenduo gleicher Konfiguration, so stellt B₁ dort die Einlaufbreite der Fadenschar dar. Sie wird auf dem Weg über das zweite Galettenduo in der gleichen Weise auf die Breite B₂ reduziert wie vorher die Einlaufbreite B₀ auf B₁. Es hat sich die Beziehung ergeben B₂/B₁ = B₁/B₀ = SW. Daraus lässt sich ableiten, dass auf dem Wege über n gleichgeartete Galettenduos die ursprüngliche Breite B₀ der Fadenschar auf Bn = B₀ * SWn reduziert wird.It has been shown that separation efficiency is of central importance. If you run the thread sheet 3 in the same way over a second godet duo of the same configuration, B₁ there represents the inlet width of the thread sheet. It is reduced on the way over the second godet duo in the same way to the width B₂ as before the inlet width B₀ on B₁. The relationship has emerged B₂ / B₁ = B₁ / B₀ = SW. From this it can be deduced that the original width B₀ of the thread group is reduced to B n = B₀ * SW n by way of n identical godet duos.

Die Wirkungsweise der Erfindung sei anhand der folgenden Beispiele erläutert.The mode of operation of the invention is illustrated by the following examples.

Beispiel 1:Example 1:

Zwei rotierende Galetten von 300 mm Länge und von 190 mm Durchmesser, sind zu einem Galettenduo zusammengefasst. Die Rotationsachse der Galette 1 ist windschief zur Rotationsachse der Galette 2 innerhalb der Ebene 12 orientiert. Der Schnittwinkel β zwischen den Ebenen 10 und 12 beträgt 90°. Das Galettenduo 1,2 wird von einem Faden achtmal umschlungen. Die Windungssteigung zwischen den einzelnen Umschlingungen nimmt auf dem Galettenduo 1,2 vom Auflauf zum Ablauf von 30.5 mm um 4 mm auf 26.5 mm ab. Die Windungssteigung in Abhängigkeit von der Achskoordinate ist in Fig. 4, Kurve a, graphisch dargestellt.Two rotating godets, 300 mm long and 190 mm in diameter, are combined to form a godet duo. The axis of rotation of the godet 1 is oriented skew to the axis of rotation of the godet 2 within the plane 12. The intersection angle β between levels 10 and 12 is 90 °. The godet duo 1.2 is wrapped eight times around a thread. The winding pitch between the individual wraps increases on the godet duo 1,2 from the casserole to the drain from 30.5 mm by 4 mm to 26.5 mm. The turn gradient as a function of the axis coordinate is shown graphically in FIG. 4, curve a.

Beispiel 2:Example 2:

Die Galettenanordnung gemäss Beispiel 1 ist so modifiziert, dass der Schnittwinkel zwischen der Ebene 10 und der Ebene 12 35° beträgt. In diesem Fall ist die Abnahme der Windungssteigung längs der Galetttenachse geringer als 1 mm. Die Windungssteigung in Abhängigkeit von der Achskoordinate ist in Fig. 4, Kurve b graphisch dargestellt.The godet arrangement according to Example 1 is modified such that the cutting angle between plane 10 and plane 12 is 35 °. In this case, the decrease in the winding pitch along the godet axis is less than 1 mm. The turn gradient as a function of the axis coordinate is shown graphically in FIG. 4, curve b.

Beispiel 3Example 3

Ein Galettenduo wie in Beispiel 1 wird von vier Filamentgarnen fünfmal auf seiner ganzen Arbeitsbreite umschlungen. Die Windungssteigung der ersten Fadenumwindung des ersten Fadens beträgt 77 mm. Der zweite, dritte und vierte Faden werden in gleichmässigen Abständen innerhalb dieser ersten Windung positioniert. Damit ergibt sich ein Schwerpunktsabstand zwischen dem ersten und dem vierten Faden von BO = 58 mm. Dieser Abstand reduziert sich bis zum Ablaufpunkt der Fäden von diesem Galettenduo auf B₁ = 24 mm. Daraus folgt ein Separationswirkungsgrad SW von 0.41, d. h. die ursprüngliche Breite der Fadenschar wird auf 41 % reduziert. Auf einem nachgeschalteten zweiten gleichartigen Streckgalettenduo würde sich dieser Abstand aufgrund des Separarationswirkungsgrades SW = 0.41 weiter auf 10 mm reduzieren. Bei einem für einen sicheren Betrieb erforderlichen Fadenabstand von mindestens 1 mm kann man mit einer solchen Galettenduokonfiguration lediglich feine Filamentgarne mit einer Breite von nicht mehr als 2 mm behandeln. Auf einem weiteren dritten Galettenduo würde der Abstand sich soweit verringern, dass die Fäden praktisch nicht mehr voneinander zu unterscheiden wären.A godet duo as in Example 1 is wrapped five times over its entire working width by four filament yarns. The pitch of the first thread winding of the first thread is 77 mm. The second, third and fourth threads are positioned at regular intervals within this first turn. This results in a center of gravity distance between the first and the fourth thread of B O = 58 mm. This distance is reduced to the point at which the threads run from this godet duo to B₁ = 24 mm. This results in a separation efficiency SW of 0.41, ie the original width of the thread sheet is reduced to 41%. On a downstream second similar stretch godet duo, this distance would further reduce to 10 mm due to the separation efficiency SW = 0.41. With a thread spacing of at least 1 mm required for safe operation, only fine filament yarns with a width of not more than 2 mm can be treated with such a godet duo configuration. On another third godet duo, the distance would decrease to such an extent that the threads could practically no longer be distinguished from one another.

Beispiel 4 (Vergleichsbeispiel)Example 4 (comparative example)

Zwei rotierende Galetten von 300 mm Länge und von 190 mm Durchmesser werden wie in Beispiel 3 von vier Filamentgarnen fünfmal umschlungen. Die Achsen der beiden Galetten sind nicht windschief zueinander orientiert, sondern liegen innerhalb einer Ebene, d. h., die Ebenen 10 und 12 sind komplanar, der Schnittwinkel β ist gleich 0. Die Windungssteigung der ersten Fadenumwindung des ersten Fadens beträgt 58 mm. Der zweite, dritte und vierte Faden werden in gleichmässigen Abständen innerhalb dieser ersten Windung positioniert. Damit ergibt sich ein Schwerpunktsabstand zwischen dem ersten und dem vierten Faden von BO = 43.3 mm. Dieser Abstand reduziert sich bis zum Ablaufpunkt der Fäden von diesem Galettenduo auf B₁ = 34.8 mm. Daraus folgt ein Separationswirkungsgrad SW von 0.804. Auf einem nachgeschalteten zweiten gleichartigen Streckgalettenduo reduziert sich dieser Abstand weiter auf B₂ = 28 mm. Selbst nach der Passage von vier gleichgearteten Galettenduos verbleibt immer noch eine Fadenscharbreite von B₄ = 18.1 mm. Unter der Randbedingung, dass für einen sicheren Betrieb ein Fadenabstand von mindestens 1 mm gewährleistet sein muss, ist damit die Möglichkeit gegeben, Fäden von 5 mm Breite noch zu trennen und ihren individuellen Spulstellen zuzuführen.Two rotating godets 300 mm in length and 190 mm in diameter are wrapped five times by four filament yarns as in Example 3. The axes of the two godets are not skew to one another, but lie within one plane, ie planes 10 and 12 are coplanar, the intersection angle β is 0. The winding pitch of the first thread winding of the first thread is 58 mm. The second, third and fourth threads are positioned at regular intervals within this first turn. This results in a center of gravity distance between the first and the fourth thread of B O = 43.3 mm. This distance is reduced to the point at which the threads run from this godet duo to B₁ = 34.8 mm. This results in a separation efficiency SW of 0.804. On a downstream second similar stretch godet duo, this distance is further reduced to B₂ = 28 mm. Even after the passage of four godet duos of the same type, there is still a thread width of B₄ = 18.1 mm. Under the boundary condition that a thread spacing of at least 1 mm must be guaranteed for safe operation, there is the possibility of still separating threads of 5 mm width and feeding them to their individual winding points.

Beispiele 5 bis 12Examples 5 to 12

Zwei rotierende Galetten von 300 mm Länge und von 190 mm Durchmesser werden wie in Beispiel 3 von vier Filamentgarnen fünfmal auf ihrer ganzen Arbeitsbreite umschlungen. Die Achsen der beiden Galetten stehen windschief zueinander. Ihre gegenseitige Orientierung wird dergestalt variiert, dass der Schnittwinkel zwischen den Ebenen 10 und 12 unterschiedliche Werte zwischen 10° und 80° annimmt. Der Einfluss des Schnittwinkels β auf die Breite der Fadenschar B₀ am Einlauf und B₁ am Auslauf des Galettenduos wurde bestimmt und daraus der Separationsgrad SW errechnet. Die Resultate sind in Tabelle 1 zusammen mit denen der Beispiele 3 und 4 zusammengestellt. Daraus ist zu entnehmen, dass die Werte für den Separationsgrad SW sich nicht monoton mit dem Schnittwinkel verändern, sondern ein Maximum durchlaufen. In Fig. 5, Kurve a, ist dieser Verlauf graphisch dargestellt.Two rotating godets 300 mm in length and 190 mm in diameter are looped five times over their entire working width as in Example 3 by four filament yarns. The axes of the two godets are skew to each other. Their mutual orientation is varied in such a way that the intersection angle between planes 10 and 12 takes on different values between 10 ° and 80 °. The influence of the cutting angle β on the width of the thread sheet B₀ at the inlet and B₁ at the outlet of the godet duo was determined and the degree of separation SW was calculated. The results are shown in Table 1 together with those of Examples 3 and 4. It can be seen from this that the values for the degree of separation SW do not change monotonically with the cutting angle, but run through a maximum. This curve is shown graphically in FIG. 5, curve a.

In Kenntnis der oben erwähnten Funktion, Bn = BO * SWn, mit welcher sich die Breite der Fadenschar auf weiteren Galettenduos weiter verrringert, wurde für den Bereich 0 ° ≤ β ≤ 70° die Bündelbreite B₄ beim Verlassen eines vierten gleichgestalteten Galettenduos errechnet, ebenso die dabei resultierenden Abstände zwischen zu verarbeitenden Filamentgarnen von 5 mm Breite. Auch diese Resultate sind in der Tabelle 1 aufgelistet. Man erkennt, dass vor allem die Abstände zwischen den Filamentgarnen innerhalb des Winkelbereichs 10° ≤ β ≤ 60° mindestens doppelt so gross sind wie ausserhalb. Damit wird eine wesentlich höhere Betriebssicherheit erreicht. Auch wird verhindert, dass einzelne Filamente eines Filamentgarns zum benachbarten Filament hinüberwechseln. Durch die grösseren Abstände zwischen den Filamentgarnen wird die Handhabung wesentlich erleichtert. Tabelle Nr. 1 Beispiel Nr. Schnitt winkel β B0 [mm] B1 [mm] Sep.- wirkung SW B4 [mm] Fadenabstand [mm] 3 90 57.6 23.6 0.410 4 0 43.3 34.8 0.804 18.1 1.0 5 10 42.4 35.8 0.844 21.4 2.1 6 20 41.9 36.2 0.864 23.3 2.8 7 30 41.8 36.4 0.871 24.0 3.0 8 40 41.8 36.4 0.871 24.0 3.0 9 50 42.0 36.1 0.860 23.0 2.7 10 60 42.3 35.5 0.839 21.0 2.0 11 70 43.4 34.5 0.795 17.5 0.8 12 80 46.1 32.4 0.703 Knowing the above-mentioned function, B n = B O * SW n , with which the width of the thread group on further godet duos is further reduced, the bundle width B₄ was calculated for the range 0 ° ≤ β ≤ 70 ° when leaving a fourth identical godet duo , as well as the resulting distances between 5 mm wide filament yarns to be processed. These results are also listed in Table 1. It can be seen that the distances between the filament yarns within the angular range 10 ° β β ° 60 ° are at least twice as large as outside. This results in a significantly higher level of operational reliability. It also prevents individual filaments of a filament yarn from changing over to the neighboring filament. Handling is made considerably easier due to the larger distances between the filament yarns. Table No. 1 Example No. Section angle β B0 [mm] B1 [mm] Sep. effect SW B4 [mm] Thread spacing [mm] 3rd 90 57.6 23.6 0.410 4th 0 43.3 34.8 0.804 18.1 1.0 5 10th 42.4 35.8 0.844 April 21 2.1 6 20th 41.9 36.2 0.864 23.3 2.8 7 30th 41.8 36.4 0.871 24.0 3.0 8th 40 41.8 36.4 0.871 24.0 3.0 9 50 42.0 36.1 0.860 23.0 2.7 10th 60 42.3 35.5 0.839 21.0 2.0 11 70 43.4 34.5 0.795 17.5 0.8 12th 80 46.1 32.4 0.703

Wie aus den Werten der Tabelle hervorgeht, hängt die Separationswirkung SW in nicht monotoner Weise vom Winkel β der Aufhängung des Galettenduos ab. Es wurde bei den Untersuchungen überraschend ein Winkelbereich 10° ≤ β ≤ 60° gefunden, innerhalb dessen die Separationswirkung SW ein Maximum durchläuft. Innerhalb dieses Winkelbereichs ist der resultierende Abstand zwischen Fäden mit 5 mm Breite nach der Passage von vier Galettenduos mindestens doppelt so gross wie bekannt.As can be seen from the values in the table, the separation effect SW depends in a non-monotonous manner on the angle β of the suspension of the godet duo. Surprisingly, an angle range of 10 ° β β 60 60 ° was found in the investigations, within which the separation effect SW runs through a maximum. Within this angular range, the resulting distance between threads with a width of 5 mm after the passage of four godet duos is at least twice as large as known.

Die dadurch erzielte höhere Betriebssicherheit erbringt einerseits eine bessere Gewährleistung der Qualität des erzeugten Filamentgarns, andererseits wird dadurch der Uebergang zum gleichzeitigen Behandeln von zwei oder mehr Fäden ermöglicht oder zumindest erleichtert. Das Resultat ist eine wesentliche Erhöhung der Produktivität des Spinnstreckverfahrens gegenüber dem Einendprozess.The higher level of operational safety achieved thereby results in a better guarantee of the quality of the filament yarn produced, and on the other hand it enables or at least facilitates the transition to the simultaneous treatment of two or more threads. The result is a significant increase in the productivity of the spin-stretching process compared to the one-end process.

Claims (2)

  1. Apparatus for spin-drawing at least two thermoplastic filament yarns on at least two pairs of godets (1, 2 and 1', 2'), each comprising two rotatable godets, of which at least one godet is driven and their axes of rotation (7, 8) lie skew with respect to each other and are arranged in such a way that the axis of rotation (8) of the one godet (2) is arranged to be able to pivot within a plane (12) and forms an angle of intersection α with the lines (11) parallel to the non-pivotable axis of rotation (7) and the plane (12) forms an angle of intersection (β) with another plane (10) which is defined by the non-pivotable axis of rotation (7) and the centre (9) of the pivotable axis of rotation (8) and characterized in that the angle of intersection (β) formed between the two planes (10) and (12) is 10°-60°.
  2. Apparatus according to Claim 1, characterized in that the working width of the godets (1, 2) is 250 mm - 400 mm.
EP92920356A 1991-10-15 1992-10-07 Device for spin-drawing thermoplastic filament yarns Expired - Lifetime EP0562075B1 (en)

Applications Claiming Priority (3)

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CH3023/91 1991-10-15
CH302391 1991-10-15
PCT/CH1992/000203 WO1993008320A1 (en) 1991-10-15 1992-10-07 Device for spin-drawing thermoplastic filament yarns

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EP0562075A1 EP0562075A1 (en) 1993-09-29
EP0562075B1 true EP0562075B1 (en) 1996-03-13

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DE102007040215A1 (en) 2007-08-25 2009-02-26 Oerlikon Textile Gmbh & Co. Kg Device for feeding synthetic fibers with roll unit with more than two feed rolls in succession useful for production of synthetic fibers by melt spinning allow simultaneous heating of fibers because of compact arrangement of feed rolls

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CN110997990A (en) * 2017-08-05 2020-04-10 欧瑞康纺织有限及两合公司 Device for withdrawing and winding a thread sheet

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CH497549A (en) * 1968-04-24 1970-10-15 Rieter Ag Maschf Process for drawing and winding an endless filament thread and device for carrying out the process
US3978192A (en) * 1971-09-23 1976-08-31 Sussman Martin V Method of drawing fibers using a microterraced drawing surface
GB1415947A (en) * 1972-09-11 1975-12-03 Autlmatik Apparate Maschinenba Spinning machines for producing and reeling synthetic fibres
DE3026520C2 (en) * 1980-07-12 1985-03-21 Davy McKee AG, 6000 Frankfurt Process for the production of high-strength technical yarns by spinning draws
US4293518A (en) * 1980-07-31 1981-10-06 E. I. Du Pont De Nemours And Company Control of synthetic yarns during drawing with heated rolls
US4522774A (en) * 1981-06-11 1985-06-11 Badische Corporation Integrated process for the production of textured polycaprolactam multifilament yarn
DE3617248C2 (en) * 1985-08-30 1995-05-24 Barmag Barmer Maschf Process for producing a composite thread from man-made fibers
JP2913712B2 (en) * 1989-12-26 1999-06-28 東レ株式会社 Direct spinning and drawing method for multifilament synthetic fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007040215A1 (en) 2007-08-25 2009-02-26 Oerlikon Textile Gmbh & Co. Kg Device for feeding synthetic fibers with roll unit with more than two feed rolls in succession useful for production of synthetic fibers by melt spinning allow simultaneous heating of fibers because of compact arrangement of feed rolls

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EP0562075A1 (en) 1993-09-29
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BR9205505A (en) 1994-04-05
JPH06503611A (en) 1994-04-21
US5419022A (en) 1995-05-30
KR930703487A (en) 1993-11-30
ES2086767T3 (en) 1996-07-01
WO1993008320A1 (en) 1993-04-29
DE59205701D1 (en) 1996-04-18

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