EP0284784B1 - Spinnerette packet for bicomponent fibres having a skin-core structure - Google Patents

Spinnerette packet for bicomponent fibres having a skin-core structure Download PDF

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Publication number
EP0284784B1
EP0284784B1 EP88102885A EP88102885A EP0284784B1 EP 0284784 B1 EP0284784 B1 EP 0284784B1 EP 88102885 A EP88102885 A EP 88102885A EP 88102885 A EP88102885 A EP 88102885A EP 0284784 B1 EP0284784 B1 EP 0284784B1
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EP
European Patent Office
Prior art keywords
plate
spinnerettes
intermediate plate
channels
nozzle
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.)
Expired - Lifetime
Application number
EP88102885A
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German (de)
French (fr)
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EP0284784A3 (en
EP0284784A2 (en
Inventor
Arnold Beck
Dieter Dr. Ahrendt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEUMAG Neumuenstersche Maschinen und Anlagenbau GmbH
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NEUMAG Neumuenstersche Maschinen und Anlagenbau GmbH
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Priority to AT88102885T priority Critical patent/ATE69470T1/en
Publication of EP0284784A2 publication Critical patent/EP0284784A2/en
Publication of EP0284784A3 publication Critical patent/EP0284784A3/en
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Publication of EP0284784B1 publication Critical patent/EP0284784B1/en
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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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor

Definitions

  • the invention relates to a nozzle package for spinning bicomponent threads with a core-sheath structure according to the preamble of claim 1.
  • Synthetic bicomponent threads with a core-sheath structure are produced in order to combine the advantageous properties of different components.
  • a polymer with high strength and low elongation as the core, as a jacket a polymer that gives the thread good dyeability or a pleasant feel.
  • a defined thread structure is required, in which the jacket coaxially envelops the core in a constant thickness. This requirement can be easily met with complicated nozzle arrangements.
  • mass production however, it is necessary to accommodate a large number of suitable nozzles in a very small space. This creates considerable technical difficulties.
  • DE-OS 20 04 431 describes a nozzle package, the nozzle plate of which has six nozzles which are arranged on the corners of a regular hexagon.
  • the intermediate plate is provided with six spinning inserts, each of which protrudes with a projecting conical part into the inlet funnel of the nozzles.
  • the spinning inserts have axial bores for the supply of the core component, which are essentially aligned with the nozzles.
  • the intermediate plate has an axial feed line for the jacket component, which is connected to the inlet funnels of the nozzles by a channel system. Due to the design principle, this nozzle package is limited to a small number of nozzles which are arranged at large mutual distances.
  • the nozzle plate and the intermediate plate are made of relatively thin metal sheets and are arranged at a short distance from one another.
  • the nozzles are simple bores, which are arranged closely side by side in large numbers.
  • the space between the two plates is connected by means of holes distributed around the circumference to an annular distributor channel surrounding the plate, which forms the feed line for one of the two components.
  • This component consequently forms a layer flowing radially in the direction of the axis between the two plates, which layer is penetrated by thin axial currents of the other component.
  • No core-jacket threads of a defined structure can be produced with this nozzle package.
  • the dividing surfaces between the two components are uneven and irregular in the individual threads.
  • Another nozzle package with a large number of closely arranged nozzles is the subject of EP-A2-0 128 013.
  • two separate, nested channel systems are accommodated on the top of the intermediate plate, each of which consists of a number of grooves.
  • Each groove has a series of holes at the bottom of the groove, so that a system of holes is assigned to each channel system.
  • the holes of one system are aligned with the nozzles and serve to feed the core component.
  • the holes in the other system are arranged so that each hole in the first system is surrounded by several holes in the other system.
  • Through holes in a third plate the one channel system of the intermediate plate is connected to a feed chamber for the core component, and the other channel system is connected to a feed chamber for the jacket component.
  • the inflow conditions are the same for all nozzles, but the supply of the jacket component does not guarantee an exactly concentric thread structure.
  • the height of the nozzle package is relatively high due to the additional third plate required.
  • the invention has for its object to provide a nozzle package according to the preamble of claim 1, which enables the production of numerous bicomponent threads with a uniform coaxial structure in a confined space and is easy to manufacture and has a low overall height.
  • the two polymer components are kept separate in the space between the nozzle plate and the intermediate plate and are fed to the individual nozzles in precisely guided, separate streams.
  • This advantage which was previously only achievable with individual nozzles or with complicated arrangements of a few nozzles, is realized by the invention in a nozzle package in which many hundreds or even a few thousand nozzles can be installed in a very small space.
  • the nozzle package consists of a few components that are produced by simple milling and drilling.
  • the feature of claim 2 has extraordinary manufacturing advantages.
  • the feature of claim 3 has the advantage that the channels are short, so that the pressure drop is kept low.
  • Figure 1 shows a plan view of the nozzle package with a partial section.
  • Figure 2 shows an offset longitudinal section through the nozzle package.
  • FIG. 3 shows a cross section through the nozzle packet on an enlarged scale.
  • FIG. 4 shows a plan view of a part of the nozzle plate on a further enlarged scale.
  • FIG. 5 shows a detail from FIG. 3 on an enlarged scale.
  • FIG. 6 shows a horizontal section through the intermediate plate for a section corresponding to FIG. 4.
  • the nozzle package essentially consists of three superimposed parts which are firmly connected by screws, namely a nozzle plate 1, an intermediate plate 2 and a hood 3. Seals are inserted between the individual parts.
  • the nozzle package has the shape of a rectangle, the length of which is approximately four times the width.
  • Two functionally separate systems 4, 5 are accommodated in the nozzle package. Since one system is completely the same as the other, it is sufficient to describe only one of the two systems.
  • the nozzle plate 1 has the shape of a rectangular flat bowl with a raised edge. It is divided in the middle into two compartments by a transverse dividing wall 6, the upper edge of which lies in the same plane as the upper edge of the edge, one of which belongs to the system 4 and the other to the system 5. In each compartment, the bottom surface is provided with longitudinal, parallel grooves 7, between which narrow webs 8 have remained. The grooves 7 are interrupted in the middle of the compartment by a transverse, wide threshold 9, the height of which corresponds to the height of the webs 8.
  • Each groove 7 has mirror-symmetrical extensions 10, which are segment-like in plan view, at equal intervals on both sides.
  • the side walls of the groove 7 therefore consist alternately of flat and cylindrical shell-shaped wall sections 11, 12.
  • the groove base is provided with a series of nozzles 13, the axes of which the axes of curvature of the cylindrical shell-shaped wall sections 12 coincide.
  • Each nozzle 13 consists of an inlet funnel 14, the mouth radius of which corresponds to the radius of curvature of the cylindrical shell-shaped wall sections 12, and a capillary bore 15.
  • the nozzles 13 of two adjacent grooves 7 are arranged offset to one another, i.e. their axes lie in a top view on the corners of an oblique grid; this can be seen in FIGS. 4 and 6, in which the deviation of the cutting angle from a right angle is designated by ⁇ .
  • the intermediate plate 2 has longitudinal slats 16 on the underside, the lower parts of which penetrate into the grooves 7 of the nozzle plate 1 down to the groove base.
  • the width of a lamella is approximately equal to the distance between two opposite flat wall sections 11 of the groove wall, so that the lamella 16 is seated in the groove 7 without any significant play.
  • the cross section of the intermediate plate 2 which can be seen best in FIG. 3, resembles a comb.
  • Each lamella 16 is provided with a series of vertical bores 17 so that each bore 17 is aligned with a nozzle 13.
  • the bores 17 - as can best be seen from FIG. 5 - have a much larger diameter than the capillary bores 15 over most of their length. They are narrowed like a capillary only on a short piece near the lower end. At the upper end, each hole is chamfered at the edge ( Figure 3).
  • a filter screen 18 covers the entire surface of the intermediate plate 2 provided with bores 17.
  • the slats 16 are interrupted by a transverse, continuous distribution channel 19, the width of which corresponds to the width of the threshold 9.
  • Rectangular channels 20 are located between the slats 16 above the level up to which the webs 8 extend.
  • the upper boundary surfaces 21 of the channels 20 lie in a slightly inclined plane, so that the height, which is immediately next to the distribution channel 19 with the height of the distribution channel 19 coincides, decreases in the direction of the edge or in the direction of the partition 6.
  • the channels 20 are in open connection with the distribution channel 19.
  • the hood 3 consists of a thick metal plate, from which two vault-shaped chambers 22 have been worked out on the underside. These correspond to the two compartments of the nozzle plate 1.
  • a bore 23 opens into each of the two chambers 22 and penetrates the chamber ceiling.
  • a pipe section 24 sits in a second bore, which passes through the chamber 22, penetrates the intermediate plate 2 and opens into the distribution channel 19 from above.
  • the core component is fed by means of a spinning pump through a pipe connected to the bore 23 and fills the chamber 22. It is pressed through the bores 17 and reaches the inlet funnels 14 in the form of thread-like streams their length has a relatively large diameter, the flow resistance is low.
  • the jacket component is also pressed by means of a spinning pump via the pipe 24 into the distribution channel 19 and distributed to the channels 20 on both sides.
  • the extensions 10 form passages that the jacket component perpendicular steer downward into the inlet funnel 14, where it surrounds the thread-like streams of the core component emerging from the bores 17.
  • a thin, coaxial layer of the cladding component is carried away by the core component due to the injector action.
  • the emerging threads are cooled in the usual way by an air stream; the staggered arrangement of the nozzles 13 prevents the individual threads from lying in the slipstream.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Multicomponent Fibers (AREA)

Abstract

The package of spinning nozzles is assembled of a nozzle plate, an intermediate plate and a cover plate. The upper side of the nozzle plate is provided with a plurality of parallel grooves each having a bottom wall formed with a series of spinning nozzles. The lower side of the intermediate plate is formed with a plurality of lamellae projecting into the corresponding grooves of the nozzle plate. Each lamella has a series of throughbores which are aligned with respective spinning nozzles. The intermediate plate is formed with a transverse main distributing channel which communicates at opposite sides thereof with distributing branch channels extending between the lamellae and being delimited by the upper side of the nozzle plate. The distributing branch channels communicate with respective spinning nozzles via curved recesses formed in the lateral walls of the grooves. The bottom side of the cover plate is formed with a dome-shaped recess enclosing the inlets of the through-bores in the intermediate plate. The recess is provided with an inlet for the core component of the extruded filaments and with another inlet for receiving a tubular conduit communicating with the transverse main distributing channel to supply the sheath component therein.

Description

Die Erfindung betrifft ein Düsenpaket zum Spinnen von Bikomponentenfäden mit Kern-Mantel-Struktur gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a nozzle package for spinning bicomponent threads with a core-sheath structure according to the preamble of claim 1.

Synthetische Bikomponentenfäden mit Kern-Mantel-Struktur werden hergestellt, um die vorteilhaften Eigenschaften unterschiedlicher Komponenten miteinander zu vereinen. Beispielsweise ist es möglich, als Kern ein Polymer mit hoher Festigkeit und geringer Dehnung zu verwenden, als Mantel ein Polymer, das dem Faden eine gute Färbbarkeit oder einen angenehmen Griff verleiht. Für viele Anwendungsfälle wird eine definierte Fadenstruktur verlangt, bei der der Mantel den Kern koaxial in gleichbleibender Dicke umhüllt. Diese Forderung läßt sich zwar mit komplizierten Düsenanordnungen leicht erfüllen. Für die Massenproduktion ist es aber notwendig, eine große Anzahl geeigneter Düsen auf engstem Raum unterzubringen. Dies bereitet erhebliche technische Schwierigkeiten.Synthetic bicomponent threads with a core-sheath structure are produced in order to combine the advantageous properties of different components. For example, it is possible to use a polymer with high strength and low elongation as the core, as a jacket a polymer that gives the thread good dyeability or a pleasant feel. For many applications, a defined thread structure is required, in which the jacket coaxially envelops the core in a constant thickness. This requirement can be easily met with complicated nozzle arrangements. For mass production, however, it is necessary to accommodate a large number of suitable nozzles in a very small space. This creates considerable technical difficulties.

Die DE-OS 20 04 431 beschreibt ein Düsenpaket, dessen Düsenplatte sechs Düsen hat, die auf den Ecken eines regelmäßigen Sechsecks angeordnet sind. Die Zwischenplatte ist mit sechs Spinneinsätzen versehen, die je mit einem vorstehenden konischen Teil in Einlauftrichter der Düsen hineinragen. Die Spinneinsätze weisen axiale Bohrungen für die Zuführung der Kernkomponente auf, die im wesentlichen mit den Düsen fluchten. Die Zwischenplatte hat eine axiale Zuleitung für die Mantelkomponente, die durch ein Kanalsystem mit den Einlauftrichtern der Düsen verbunden ist. Dieses Düsenpaket ist - durch das Konstruktionsprinzip bedingt - auf eine geringe Anzahl von Düsen beschränkt, die mit großen gegenseitigen Abständen angeordnet sind.DE-OS 20 04 431 describes a nozzle package, the nozzle plate of which has six nozzles which are arranged on the corners of a regular hexagon. The intermediate plate is provided with six spinning inserts, each of which protrudes with a projecting conical part into the inlet funnel of the nozzles. The spinning inserts have axial bores for the supply of the core component, which are essentially aligned with the nozzles. The intermediate plate has an axial feed line for the jacket component, which is connected to the inlet funnels of the nozzles by a channel system. Due to the design principle, this nozzle package is limited to a small number of nozzles which are arranged at large mutual distances.

Für eine Düsenplatte, die in der DE-OS 16 60 702 beschrieben worden ist, gilt offensichtlich das gleiche.The same obviously applies to a nozzle plate which has been described in DE-OS 16 60 702.

Bei einem zur Herstellung von Bikomponentenfäden bestimmten Düsenpaket, das durch die DE-OS 14 35 559 bekannt geworden ist, sind die Düsenplatte und die Zwischenplatte aus relativ dünnen Blechen hergestellt und in geringem Abstand voneinander angeordnet. Die Düsen sind einfache Bohrungen, die in großer Anzahl eng nebeneinander angeordnet sind. Der Zwischenraum zwischen den beiden Platten ist mittels am Umfang verteilter Bohrungen mit einem die Platte umgebenden ringförmigen Verteilerkanal verbunden, der die Zuleitung für die eine der beiden Komponenten bildet. Diese Komponente bildet infolgedessen zwischen den beiden Platten eine radial in Richtung auf die Achse fließende Schicht, die von dünnen axialen Strömen der anderen Komponente durchstoßen wird. Mit diesem Düsenpaket können keine Kern-Mantel-Fäden definierter Struktur hergestellt werden. Die Trennflächen zwischen den beiden Komponenten sind in den einzelnen Fäden ungleichmäßig und regellos.In a nozzle package intended for the production of bicomponent threads, which has become known from DE-OS 14 35 559, the nozzle plate and the intermediate plate are made of relatively thin metal sheets and are arranged at a short distance from one another. The nozzles are simple bores, which are arranged closely side by side in large numbers. The space between the two plates is connected by means of holes distributed around the circumference to an annular distributor channel surrounding the plate, which forms the feed line for one of the two components. This component consequently forms a layer flowing radially in the direction of the axis between the two plates, which layer is penetrated by thin axial currents of the other component. No core-jacket threads of a defined structure can be produced with this nozzle package. The dividing surfaces between the two components are uneven and irregular in the individual threads.

Ein anderes Düsenpaket mit einer großen Anzahl eng nebeneinander angeordneter Düsen ist Gegenstand der EP-A2-0 128 013. Bei diesem Düsenpaket sind auf der Oberseite der Zwischenplatte zwei getrennte, ineinandergeschachtelte Kanalsysteme untergebracht, von denen jedes aus einer Anzahl von Nuten besteht. Jede Nut hat am Nutengrund eine Reihe von Bohrungen, so daß jedem Kanalsystem ein System von Bohrungen zugeordnet ist. Die Bohrungen des einen Systems fluchten mit den Düsen und dienen zum Zuführen der Kernkomponente. Die Bohrungen des anderen Systems sind so angeordnet, daß jede Bohrung des ersten Systems von mehreren Bohrungen des anderen Systems umgeben ist. Durch Bohrungen einer dritten Platte steht das eine Kanalsystem der Zwischenplatte mit einer Zuführkammer für die Kernkomponente in Verbindung, das andere Kanalsystem mit einer Zuführkammer für die Mantelkomponente. Bei diesem Düsenpaket sind zwar die Anströmbedingungen für alle Düsen gleich, jedoch gewährleistet die Zuführung der Mantelkomponente keinen exakt konzentrischen Fadenaufbau. Die Bauhöhe des Düsenpaketes ist wegen der zusätzlich erforderlichen dritten Platte relativ hoch.Another nozzle package with a large number of closely arranged nozzles is the subject of EP-A2-0 128 013. In this nozzle package, two separate, nested channel systems are accommodated on the top of the intermediate plate, each of which consists of a number of grooves. Each groove has a series of holes at the bottom of the groove, so that a system of holes is assigned to each channel system. The holes of one system are aligned with the nozzles and serve to feed the core component. The holes in the other system are arranged so that each hole in the first system is surrounded by several holes in the other system. Through holes in a third plate, the one channel system of the intermediate plate is connected to a feed chamber for the core component, and the other channel system is connected to a feed chamber for the jacket component. In this nozzle package, the inflow conditions are the same for all nozzles, but the supply of the jacket component does not guarantee an exactly concentric thread structure. The height of the nozzle package is relatively high due to the additional third plate required.

Der Erfindung liegt die Aufgabe zugrunde, ein Düsenpaket gemäß dem Oberbegriff des Patentanspruchs 1 zu schaffen, das die Herstellung von zahlreichen Bikomponentenfäden mit gleichmäßiger koaxialer Struktur auf engstem Raum ermöglicht und dabei einfach herzustellen ist und eine geringe Bauhöhe hat.The invention has for its object to provide a nozzle package according to the preamble of claim 1, which enables the production of numerous bicomponent threads with a uniform coaxial structure in a confined space and is easy to manufacture and has a low overall height.

Diese Aufgabe wird gemäß der Erfindung durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the characterizing part of patent claim 1.

Bei dem erfindungsgemäßen Düsenpaket werden die beiden Polymerkomponenten in dem Zwischenraum zwischen Düsenplatte und Zwischenplatte getrennt gehalten und in exakt geführten, getrennten Strömen den einzelnen Düsen zugeleitet. Dieser Vorteil, der bisher nur bei Einzeldüsen oder bei komplizierten Anordnungen einiger weniger Düsen erreichbar war, wird durch die Erfindung bei einem Düsenpaket realisiert, bei dem viele hundert oder sogar einige tausend Düsen auf engstem Raum angebracht sein können. Das Düsenpaket besteht aus wenigen Bauteilen, die durch einfache Fräs- und Bohrarbeiten hergestellt werden.In the nozzle package according to the invention, the two polymer components are kept separate in the space between the nozzle plate and the intermediate plate and are fed to the individual nozzles in precisely guided, separate streams. This advantage, which was previously only achievable with individual nozzles or with complicated arrangements of a few nozzles, is realized by the invention in a nozzle package in which many hundreds or even a few thousand nozzles can be installed in a very small space. The nozzle package consists of a few components that are produced by simple milling and drilling.

Das Merkmal des Anspruchs 2 hat außerordentliche fertigungstechnische Vorteile.The feature of claim 2 has extraordinary manufacturing advantages.

Das Merkmal des Anspruchs 3 hat den Vorteil, daß die Kanäle kurz sind, so daß der Druckabfall gering gehalten wird.The feature of claim 3 has the advantage that the channels are short, so that the pressure drop is kept low.

Durch das Merkmal des Anspruchs 4 wird die Strömung längs eines Kanals vergleichmäßigt.Due to the feature of claim 4, the flow along a channel is evened out.

Die in Anspruch 5 angegebene Unterteilung in mehrere Systeme erlaubt es, die Düsenplatte großflächig auszubilden, ohne daß die waagerechten Strömungswege allzu lang werden.The division into several systems specified in claim 5 allows the nozzle plate to be formed over a large area without the horizontal flow paths becoming too long.

Die Zeichnung dient zur Erläuterung der Erfindung anhand eines vereinfacht dargestellten Ausführungsbeispiels.The drawing serves to explain the invention with reference to an embodiment shown in simplified form.

Figur 1 zeigt eine Draufsicht auf das Düsenpaket mit einem Teilausschnitt.Figure 1 shows a plan view of the nozzle package with a partial section.

Figur 2 zeigt einen versetzten Längsschnitt durch das Düsenpaket.Figure 2 shows an offset longitudinal section through the nozzle package.

Figur 3 zeigt in vergrößertem Maßstab einen Querschnitt durch das Düsenpaket.FIG. 3 shows a cross section through the nozzle packet on an enlarged scale.

Figur 4 zeigt in nochmals vergrößertem Maßstab eine Draufsicht auf einen Teil der Düsenplatte.FIG. 4 shows a plan view of a part of the nozzle plate on a further enlarged scale.

Figur 5 zeigt eine Einzelheit aus Figur 3 in vergrößertem Maßstab.FIG. 5 shows a detail from FIG. 3 on an enlarged scale.

Figur 6 zeigt für einen der Figur 4 entsprechenden Ausschnitt einen Horizontalschnitt durch die Zwischenplatte.FIG. 6 shows a horizontal section through the intermediate plate for a section corresponding to FIG. 4.

Das Düsenpaket besteht im wesentlichen aus drei aufeinandergelegten, durch Schrauben fest miteinander verbundenen Teilen, nämlich einer Düsenplatte 1, einer Zwischenplatte 2 und einer Haube 3. Zwischen den einzelnen Teilen sind Dichtungen eingelegt. In der Draufsicht hat das Düsenpaket die Form eines Rechtecks, dessen Länge etwa viermal so groß ist wie die Breite. In dem Düsenpaket sind zwei funktionell getrennte Systeme 4, 5 untergebracht. Da das eine System dem anderen vollkommen gleicht, genügt es, nur eins der beiden Systeme zu beschreiben.The nozzle package essentially consists of three superimposed parts which are firmly connected by screws, namely a nozzle plate 1, an intermediate plate 2 and a hood 3. Seals are inserted between the individual parts. When viewed from above, the nozzle package has the shape of a rectangle, the length of which is approximately four times the width. Two functionally separate systems 4, 5 are accommodated in the nozzle package. Since one system is completely the same as the other, it is sufficient to describe only one of the two systems.

Die Düsenplatte 1 hat die Form einer rechteckigen flachen Schüssel mit erhöhtem Rand. Sie ist in der Mitte durch eine in Querrichtung verlaufende Scheidewand 6, deren Oberkante in der gleichen Ebene wie die Oberkante des Randes liegt, in zwei Abteile unterteilt, von denen das eine zu dem System 4 und das andere zu dem System 5 gehört. In jedem Abteil ist die Bodenfläche mit längslaufenden, parallelen Nuten 7 versehen, zwischen denen schmale Stege 8 stehengeblieben sind. Die Nuten 7 sind in der Mitte des Abteils durch eine quer verlaufende breite Schwelle 9 unterborchen, deren Höhe mit der Höhe der Stege 8 übereinstimmt.The nozzle plate 1 has the shape of a rectangular flat bowl with a raised edge. It is divided in the middle into two compartments by a transverse dividing wall 6, the upper edge of which lies in the same plane as the upper edge of the edge, one of which belongs to the system 4 and the other to the system 5. In each compartment, the bottom surface is provided with longitudinal, parallel grooves 7, between which narrow webs 8 have remained. The grooves 7 are interrupted in the middle of the compartment by a transverse, wide threshold 9, the height of which corresponds to the height of the webs 8.

Jede Nut 7 hat in gleichmäßigen Abständen zu beiden Seiten spiegelsymetrische, in der Draufsicht segmentförmige Erweiterungen 10. Die Seitenwände der Nut 7 bestehen daher abwechselnd aus ebenen und zylinderschalenförmigen Wandabschnitten 11, 12. Der Nutengrund ist mit einer Reihe von Düsen 13 versehen, deren Achsen mit den Krümmungsachsen der zylinderschalenförmigen Wandabschnitte 12 zusammenfallen. Jede Düse 13 besteht aus einem Einlauftrichter 14, dessen Mündungsradius dem Krümmungsradius der zylinderschalenförmigen Wandabschnitte 12 entspricht, und aus einer Kapillarbohrung 15. Die Düsen 13 zweier benachbarter Nuten 7 sind zueinander versetzt angeordnet, d.h. ihre Achsen liegen in der Draufsicht auf den Ecken eines schiefwinkligen Gitternetzes; das ist den Figuren 4 und 6 erkennbar, in denen die Abweichung des Schnittwinkels von einem rechten Winkel mit α bezeichnet ist.Each groove 7 has mirror-symmetrical extensions 10, which are segment-like in plan view, at equal intervals on both sides. The side walls of the groove 7 therefore consist alternately of flat and cylindrical shell-shaped wall sections 11, 12. The groove base is provided with a series of nozzles 13, the axes of which the axes of curvature of the cylindrical shell-shaped wall sections 12 coincide. Each nozzle 13 consists of an inlet funnel 14, the mouth radius of which corresponds to the radius of curvature of the cylindrical shell-shaped wall sections 12, and a capillary bore 15. The nozzles 13 of two adjacent grooves 7 are arranged offset to one another, i.e. their axes lie in a top view on the corners of an oblique grid; this can be seen in FIGS. 4 and 6, in which the deviation of the cutting angle from a right angle is designated by α.

Die Zwischenplatte 2 hat auf der Unterseite längslaufende Lamellen 16, die mit ihren unteren Teilen in die Nuten 7 der Düsenplatte 1 bis auf den Nutengrund eintauchen. Die Breite einer Lamelle ist annähernd gleich dem Abstand zweier gegenüberliegender ebener Wandabschnitte 11 der Nutenwand, so daß die Lamelle 16 ohne nennenswertes Spiel in der Nut 7 sitzt. Insgesamt gleicht der in Figur 3 am besten erkennbare Querschnitt der Zwischenplatte 2 einem Kamm. Jede Lamelle 16 ist mit einer Reihe von senkrechten Bohrungen 17 versehen, so daß jede Bohrung 17 mit einer Düse 13 fluchtet. Die Bohrungen 17 haben - wie am besten aus Figur 5 ersichtlich - auf dem größten Teil ihrer Länge einen wesentlich größeren Durchmesser als die Kapillarbohrungen 15. Nur auf einem kurzen Stück in der Nähe des unteren Endes sind sie kapillarenartig verengt. Am oberen Ende ist jede Bohrung am Rand trichterförmig abgeschrägt (Figur 3). Ein Filtersieb 18 deckt die gesamte mit Bohrungen 17 versehene Fläche der Zwischenplatte 2 ab.The intermediate plate 2 has longitudinal slats 16 on the underside, the lower parts of which penetrate into the grooves 7 of the nozzle plate 1 down to the groove base. The width of a lamella is approximately equal to the distance between two opposite flat wall sections 11 of the groove wall, so that the lamella 16 is seated in the groove 7 without any significant play. Overall, the cross section of the intermediate plate 2, which can be seen best in FIG. 3, resembles a comb. Each lamella 16 is provided with a series of vertical bores 17 so that each bore 17 is aligned with a nozzle 13. The bores 17 - as can best be seen from FIG. 5 - have a much larger diameter than the capillary bores 15 over most of their length. They are narrowed like a capillary only on a short piece near the lower end. At the upper end, each hole is chamfered at the edge (Figure 3). A filter screen 18 covers the entire surface of the intermediate plate 2 provided with bores 17.

Über der Schwelle 9 sind die Lamellen 16 durch einen quer verlaufenden, durchgehenden Verteilerkanal 19 unterbrochen, dessen Breite mit der Breite der Schwelle 9 übereinstimmt. Zwischen den Lamellen 16 befinden sich oberhalb der Ebene, bis zu der die Stege 8 reichen, rechteckige Kanäle 20. Die oberen Begrenzungsflächen 21 der Kanäle 20 liegen in einer leicht geneigten Ebene, so daß die Höhe, die unmittelbar neben dem Verteilerkanal 19 mit der Höhe des Verteilerkanals 19 übereinstimmt, in Richtung auf den Rand bzw. in Richtung auf die Scheidewand 6 abnimmt. Die Kanäle 20 stehen mit dem Verteilerkanal 19 in offener Verbindung.Above the threshold 9, the slats 16 are interrupted by a transverse, continuous distribution channel 19, the width of which corresponds to the width of the threshold 9. Rectangular channels 20 are located between the slats 16 above the level up to which the webs 8 extend. The upper boundary surfaces 21 of the channels 20 lie in a slightly inclined plane, so that the height, which is immediately next to the distribution channel 19 with the height of the distribution channel 19 coincides, decreases in the direction of the edge or in the direction of the partition 6. The channels 20 are in open connection with the distribution channel 19.

Die Haube 3 besteht aus einer dicken Metallplatte, aus der unterseits zwei gewölbeförmige Kammern 22 herausgearbeitet sind. Diese entsprechen den beiden Abteilen der Düsenplatte 1. In jede der beiden Kammern 22 mündet eine Bohrung 23, die die Kammerdecke durchdringt. Neben dieser Bohrung 23 sitzt in einer zweiten Bohrung ein Rohrstück 24, das durch die Kammer 22 hindurchgeht, die Zwischenplatte 2 durchdringt und von oben in den Verteilerkanal 19 einmündet.The hood 3 consists of a thick metal plate, from which two vault-shaped chambers 22 have been worked out on the underside. These correspond to the two compartments of the nozzle plate 1. A bore 23 opens into each of the two chambers 22 and penetrates the chamber ceiling. In addition to this bore 23, a pipe section 24 sits in a second bore, which passes through the chamber 22, penetrates the intermediate plate 2 and opens into the distribution channel 19 from above.

Im Betrieb wird die Kernkomponente mittels einer Spinnpumpe durch eine an die Bohrung 23 angeschlossene Rohrleitung zugeführt und füllt die Kammer 22. Sie wird durch die Bohrungen 17 gedrückt und gelangt in Form von fadenförmigen Strömen in die Einlauftrichter 14. Da die Bohrungen 17 auf dem größten Teil ihrer Länge einen relativ großen Durchmesser haben, ist der Strömungswiderstand gering. Die Mantelkomponente wird ebenfalls mittels einer Spinnpumpe über das Rohr 24 in den Verteilerkanal 19 gedrückt und zu beiden Seiten auf die Kanäle 20 verteilt. Die Erweiterungen 10 bilden Durchlässe, die die Mantelkomponente senkrecht nach unten in die Einlauftrichter 14 lenken, wo sie die aus den Bohrungen 17 austretenden fadenartigen Ströme der Kernkomponente umgibt. Durch Injektorwirkung wird eine dünne, koaxiale Schicht der Mantelkomponente von der Kernkomponente mitgenommen. Die austretenden Fäden werden in üblicher Weise durch einen Luftstrom gekühlt; durch die versetzte Anordnung der Düsen 13 wird vermieden, daß die einzelnen Fäden gegenseitig im Windschatten liegen.In operation, the core component is fed by means of a spinning pump through a pipe connected to the bore 23 and fills the chamber 22. It is pressed through the bores 17 and reaches the inlet funnels 14 in the form of thread-like streams their length has a relatively large diameter, the flow resistance is low. The jacket component is also pressed by means of a spinning pump via the pipe 24 into the distribution channel 19 and distributed to the channels 20 on both sides. The extensions 10 form passages that the jacket component perpendicular steer downward into the inlet funnel 14, where it surrounds the thread-like streams of the core component emerging from the bores 17. A thin, coaxial layer of the cladding component is carried away by the core component due to the injector action. The emerging threads are cooled in the usual way by an air stream; the staggered arrangement of the nozzles 13 prevents the individual threads from lying in the slipstream.

Claims (5)

  1. A set of spinnerettes for spinning bicomponent fibres having a core-shell structure,

    with a spinnerette plate (1) which is provided with numerous spinnerettes,

    with a hood (3) which, together with the spinnerette plate, encloses at least one hollow space,

    with an intermediate plate (2) which subdivides the hollow space and is provided with numerous bore holes which are flush with the spinnerettes,

    with at least one feeding pipe (23) for the core component, which discharges into a chamber located between the hood and the intermediate plate, and

    with at least one feeding pipe for the shell component, which discharges into the interspace between the spinnerette plate and the intermediate plate,

    characterised by the following features:

    The upper side of the spinnerette plate (1) has a number of parallel grooves (7)

    the base of each groove (7) has a row of spinnerettes (13)

    the lower side of the intermediate plate (2) has a number of discs (16)

    each disc (16) has a row of bore holes (17)

    the lower region of each disc (16) dips into a groove (7)

    channels (20) are located between the upper parts of the discs (16), which channels are connected to a distributor channel (19)

    the channels (20) are connected to inflow funnels (14) of the spinnerettes (13) by way of passages (10).
  2. A set of spinnerettes according to Claim 1, characterised in that the passages (10) are formed as enlargements of the groove (7), these enlargements being in the form of cylindrical segments.
  3. A set of spinnerettes according to Claim 1 or 2, characterised in that channels (20) lead out from both sides of the distributor channel (19).
  4. A set of spinnerettes according to any one of Claims 1 to 3, characterised in that the height of the channels (20) decreases as the distance from the distributor channel (19) increases.
  5. A set of spinnerettes according to any one of Claims 1 to 4, characterised in that it comprises at least two identical, functionally separate systems (4, 5).
EP88102885A 1987-04-01 1988-02-26 Spinnerette packet for bicomponent fibres having a skin-core structure Expired - Lifetime EP0284784B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102885T ATE69470T1 (en) 1987-04-01 1988-02-26 NOZZLE PACKAGE FOR SPINNING BI-COMPONENT THREADS WITH CORE-SHEET STRUCTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3710946 1987-04-01
DE19873710946 DE3710946A1 (en) 1987-04-01 1987-04-01 NOZZLE PACKAGE FOR SPINNING BICOMPONENT THREADS WITH A CORE-SHEATH STRUCTURE

Publications (3)

Publication Number Publication Date
EP0284784A2 EP0284784A2 (en) 1988-10-05
EP0284784A3 EP0284784A3 (en) 1989-11-29
EP0284784B1 true EP0284784B1 (en) 1991-11-13

Family

ID=6324617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102885A Expired - Lifetime EP0284784B1 (en) 1987-04-01 1988-02-26 Spinnerette packet for bicomponent fibres having a skin-core structure

Country Status (5)

Country Link
US (1) US4846653A (en)
EP (1) EP0284784B1 (en)
JP (1) JPS63256709A (en)
AT (1) ATE69470T1 (en)
DE (2) DE3710946A1 (en)

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DE3941824A1 (en) * 1989-12-19 1991-06-27 Corovin Gmbh METHOD AND SPINNING DEVICE FOR PRODUCING MICROFILAMENTS
IT1255891B (en) * 1992-10-19 1995-11-17 EXTRUSION HEAD FOR TWO-COMPONENT YARNS WITH HIGH DENSITY DIE OF HOLES
US6402841B1 (en) * 1997-02-21 2002-06-11 Akzo Nobel N.V. Glue application device with glue conduit surrounding hardener conduit
US5853635A (en) * 1997-06-18 1998-12-29 Kimberly-Clark Worldwide, Inc. Method of making heteroconstituent and layered nonwoven materials
DE19750723C1 (en) * 1997-11-15 1999-10-07 Reifenhaeuser Masch Device for producing a spunbonded fabric from bicomponent threads
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IT1302696B1 (en) * 1998-10-19 2000-09-29 Rosaldo Fare EQUIPMENT AND PROCEDURE FOR THE CONSTRUCTION OF FIBER CONTINUOUS TWO-COMPONENT OFYLAMENTS WITH THE USE OF DUCT INSERTS
US6168409B1 (en) * 1998-11-13 2001-01-02 Rosaldo Fare Apparatus for making two component fibers or continuous filaments using flexible tube inserts
US6413071B1 (en) 2000-03-27 2002-07-02 Basf Corporation Thin plate spinnerette assembly
US6474967B1 (en) 2000-05-18 2002-11-05 Kimberly-Clark Worldwide, Inc. Breaker plate assembly for producing bicomponent fibers in a meltblown apparatus
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DE10037906A1 (en) * 2000-08-03 2002-02-14 Hdw Isoliertechnik Gmbh Extrusion die for production of multi-chamber plastic profiles has a melt flow broadening zone and a matrix of flow dividers with cores at the ends for dividing flow into part streams
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Also Published As

Publication number Publication date
DE3866145D1 (en) 1991-12-19
JPS63256709A (en) 1988-10-24
EP0284784A3 (en) 1989-11-29
ATE69470T1 (en) 1991-11-15
US4846653A (en) 1989-07-11
JPH0347324B2 (en) 1991-07-19
DE3710946A1 (en) 1988-10-13
EP0284784A2 (en) 1988-10-05

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