EP1208250A1 - Self-sealing compact spinneret for a melt spinning process - Google Patents

Self-sealing compact spinneret for a melt spinning process

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Publication number
EP1208250A1
EP1208250A1 EP00942123A EP00942123A EP1208250A1 EP 1208250 A1 EP1208250 A1 EP 1208250A1 EP 00942123 A EP00942123 A EP 00942123A EP 00942123 A EP00942123 A EP 00942123A EP 1208250 A1 EP1208250 A1 EP 1208250A1
Authority
EP
European Patent Office
Prior art keywords
spinneret
housing
spinneret plate
filter
filter arrangement
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
Application number
EP00942123A
Other languages
German (de)
French (fr)
Other versions
EP1208250B1 (en
Inventor
Heinz-Dieter Beeck
Roland Estelmann
Rainer Tietze
Andreas Weichel
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.)
LL Plant Engineering AG
Original Assignee
Lurgi Zimmer GmbH
ZiAG Plant Engineering GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lurgi Zimmer GmbH, ZiAG Plant Engineering GmbH filed Critical Lurgi Zimmer GmbH
Publication of EP1208250A1 publication Critical patent/EP1208250A1/en
Application granted granted Critical
Publication of EP1208250B1 publication Critical patent/EP1208250B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • 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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/10—Filtering or de-aerating the spinning solution or melt
    • D01D1/106—Filtering
    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/08—Supporting spinnerettes or other parts of spinnerette packs

Definitions

  • the invention relates to a spinneret for spinning thermoplastics with a central polymer inlet channel, a filter arrangement consisting of one or more filter rounds of different filter fineness, a spinneret plate and a housing which accommodates and closely encloses the filter arrangement and the spinneret plate.
  • the object of the present invention is to provide a spinneret for spinning thermoplastics, which avoids the disadvantages mentioned both of sand fillings and of sealing surrounds.
  • the spinneret should be as compact as possible.
  • filter assemblies made of filter blanks that are cold-pressed together, but without the conventional sealing surround, are inserted into a housing bore that fits as closely as possible, the material of the filter having to have a significantly higher coefficient of thermal expansion than the material of the housing.
  • the fi lter superstructures are sealed at operating temperature by thermal expansion and that of the spout plate in any way.
  • the filter arrangement can be constructed in any way and be made of a material with any thermal expansion coefficient.
  • both the filter made of cold-pressed filter blanks and the spinneret plate are made of materials with a high coefficient of thermal expansion, and both parts are inserted into bores of the housing which are made from a material with a low coefficient of thermal expansion.
  • the spinneret plate is preferably provided with a thread in the lower half in addition to the aforementioned precisely fitting sealing seat and screwed directly into the housing, the thread and the stop of the nozzle in the housing being equipped in such a way that the spinning hole pattern is always in the same orientation , This ensures that when the screw is screwed in as far as it will go, the fila duck is correctly blown during spinning.
  • the housing is preferably provided at its lower end with a protruding collar which has at least three grooves for receiving a tool for screwing in and unscrewing from the spinning system and which also protects the nozzle from harmful contact during handling.
  • the filter insert according to the invention avoids the disadvantages of classic sand filtering and the elimination of the conventional seals brings significant cost savings and increased Tight security. Due to the suitable choice of material and fit of the individual parts of the spinneret according to the invention, the sealing effect takes place at operating temperature due to the increased expansion of the internal components, filter and / or nozzle plate compared to the external housing, without additional sealing elements being required.
  • the short and compact design is also advantageous: Cost-effective production and easier handling with uniform and identical filtration from nozzle to nozzle.
  • FIG. 1 shows the representation of an exemplary spinneret arrangement: in a housing 1, a cold-sintered filter 2, the structure of which consists of individual layers of filter blanks of different filter fineness specifically selected for the respective spinning process, rests on a spinneret plate 3.
  • the spinneret plate 3 is fastened in the housing 1 by means of a thread.
  • This thread in the housing 1 and on the spinneret plate 3 is designed so that the spinning hole pattern always comes to the same place when screwing in as far as it will go, so that the correct blowing of the filaments is ensured during spinning.
  • the connection to the polymer melt supply is made via the connection seal 4 and (from here no longer shown) an adapter to the heating vessel (also called a spinning beam).
  • the design can be adapted to the needs of the operator and to his existing equipment.
  • the housing 1 consists, for example, of material no. 1.4057 (according to DIN steel key), a material with a relatively low coefficient of thermal expansion.
  • the spinneret plate 3 can then be made from material No. 1.4580 and the filter assembly 2 from No. 1.4301 or 1.4541, all materials with a relatively high Thermal expansion coefficient.
  • the fits are selected according to the dimensions and materials so that the individual parts are easy to assemble and dismantle when cold and, on the one hand, the sealing effect takes place at the latest shortly before reaching the specified spinning temperature, and on the other hand the parts at an increased cleaning temperature (approx. 450. .. 540 ° C) do not suffer damage from overextension.
  • the desired self-sealing function in the operating state is achieved without conventional seals by the targeted material pairing and fit selection:
  • the four parts, housing 1, filter 2, spinneret plate 3 and connection seal 4 are installed in the cold state and then heated up as usual. Due to the different thermal expansion, the sealing effect occurs and the nozzle can be spun at any pressure.
  • the outer housing 1 consists of a material with a relatively low coefficient of thermal expansion
  • the inner parts, filters 2 and / or spinneret plate 3 are made of materials with a higher coefficient of thermal expansion.
  • the installation dimensions are selected so that the parts are easy to assemble when cold (room temperature), but at spinning operating temperatures (approx. 300 ° C) the different expansion results in self-sealing press fits between the parts.
  • the entire nozzle is cleaned and only dismantled after it has cooled. Thereafter, the spinneret plate 3 and the filter element 2, which can be used as often as a filter candle, can be further cleaned and sonicated.
  • the sealing principle presented here due to different thermal expansion is not limited to the described spinneret and filter applications, but can be used anywhere wherever you want to filter, shear or spin, whether for microfibers, textile filaments, high-strength tire cord or other applications. It is up to the responsible product or application specialist to determine or empirically determine the design with regard to the choice of cold-sintered filters, the materials and the fits for his particular case.

Abstract

The invention relates to a spinneret for spinning thermoplastics. Said spinneret comprises a central polymer inlet channel, a filter assembly (2), consisting of one or more filter plates of various filtration grades, a spinneret plate (3) and a housing (1) which receives and tightly surrounds the filter assembly (2) and the spinneret plate (3). The selection of suitable materials and tolerances for the individual parts of the spinneret enables the sealing effect to be achieved at operating temperature by the increased expansion of the internal components, in relation to the external housing.

Description

Selbstdichtende Kompaktdüse für SchmelzspinnverfahrenSelf-sealing compact nozzle for melt spinning processes
Beschreibung:Description:
Die Erfindung betrifft eine Spinndüse zum Verspinnen von Thermoplasten mit einem zentralen Polymersch elzeeintrittskanal , einer Filteranordnung, bestehend aus einer oder mehreren Filterronden verschiedener Filterfeinheit, einer Spinndüsenplatte und einem die Filteranordnung und die Spinndüsenplatte aufnehmenden und eng umschließenden Gehäuse.The invention relates to a spinneret for spinning thermoplastics with a central polymer inlet channel, a filter arrangement consisting of one or more filter rounds of different filter fineness, a spinneret plate and a housing which accommodates and closely encloses the filter arrangement and the spinneret plate.
Druckaufbau, Scherung und Filterung des zu verspinnenden Polymers in Spinndüsen wurde bisher üblicherweise durch eine Sandschüttung vorgenommen, wie sie z. B. in US-Patent 5 304052 oder US-Patent 5 795 595 beschrieben wird. Diese Sandschüttungen, ob Stahl- oder echter Quarzsand, sind aber mit verschiedenen Nachteilen behaftet: Zum einen sind die Sandfüllungen selbst bei sorgfältigster Durchführung nicht von Düse zu Düse identisch, und zum anderen bestehen Handhabungsschwierigkeiten bezüglich der Befüll ung mit Sand und des Transportes der gefüllten Spinndüsen. Außerdem können vereinzelte Sandkörner die internen Dichtungen in den Spinndüsen unwirksam machen. Diese Dichtungen, gebildet durch die Einfassungen der Siebfilter, bilden zu allem Überfluß durch ihre U-Form auch noch kleine Totzonen, d. h. in den u-förmigen Einfassungen wird der Austausch erschwert und es kommt dadurch zum Abbau des Polymers. Hinzu kommt der Kostenfaktor. Jedes Bauteil verursacht Kosten und Dichtungen verursachen sogar laufende Betriebskosten, weil sie nur einmal einsetzbar sind und bei jedem Düsenwechsel erneuert werden müssen. Auch gibt es keine absolute Dichtsicherheit, wie leider aus der Praxis bekannt ist, da sich Fertigungs- und Montagefehler mit steigender Anzahl der Einzelteile zwangsläufig erhöhen.Pressure build-up, shear and filtering of the polymer to be spun in spinnerets has hitherto usually been carried out by pouring sand, as used, for. Described in U.S. Patent 5,304,052 or U.S. Patent 5,795,595. However, these sand fillings, whether steel or real quartz sand, have various disadvantages: on the one hand, the sand fillings are not identical from nozzle to nozzle, even with the most careful execution, and on the other hand there are handling difficulties with the filling with sand and the transport of the filled spinnerets , In addition, isolated grains of sand can render the internal seals in the spinnerets ineffective. In addition to their abundance, the U-shape of these seals, formed by the sieves of the sieve filters, also creates small dead zones, which means that the exchange in the U-shaped surrounds is made more difficult and the polymer is broken down. Then there is the cost factor. Each component causes costs and seals even cause running costs because they can only be used once and have to be replaced every time the nozzle is changed. There is also no absolute Tightness, as is unfortunately known from practice, since manufacturing and assembly errors inevitably increase with an increasing number of individual parts.
Zur Behebung einiger der mit Sandfüllungen verbundenen Nachteile wurde vorgeschlagen einen Filteraufbau, wie er z. B. aus dem DE 29 26 533 C2 bekannt ist, einzusetzen. Dabei findet ein Verfahren Anwendung, bei dem die einzelnen Filterronden miteinander kalt verpreßt werden, so daß eine wesentlich bessere Filterwirkung erzielt wird als bei der identischen Anordnung loser Filterronden. Derartige kaltgesinterte Filter sind mit einer Dichtungseinfassung versehen und werden von verschiedenen Anbietern unter Handelsnamen wie "Porostar" oder "Multipor" vertrieben. Die Dichtungseinfassung unterliegt dabei den zuvor geschilderten Nachteilen.In order to remedy some of the disadvantages associated with sand fillings, it has been proposed to use a filter structure such as B. is known from DE 29 26 533 C2 to use. A method is used in which the individual filter blanks are cold pressed together, so that a much better filter effect is achieved than with the identical arrangement of loose filter blanks. Such cold sintered filters are provided with a sealing rim and are sold by various suppliers under trade names such as "Porostar" or "Multipor". The seal surround is subject to the disadvantages described above.
Aufgabe der vorliegenden Erfindung ist es, eine Spinndüse zum Verspinnen von Thermoplasten zur Verfügung zu stellen, die die genannten Nachteile sowohl von Sandschüttungen als auch von Dichtungseinfassungen vermeidet. Dabei sollte die Spinndüse möglichst kompakt gestaltet sein.The object of the present invention is to provide a spinneret for spinning thermoplastics, which avoids the disadvantages mentioned both of sand fillings and of sealing surrounds. The spinneret should be as compact as possible.
Die Lösung dieser Aufgabe erfolgt erfindungsgemäß durch eine Spinndüse gemäß den Angaben der Patentansprüche.This object is achieved according to the invention by a spinneret in accordance with the details of the claims.
Erfindungsgemäß werden Filteraufbauten aus miteinander kalt verpreßten Filterronden, jedoch ohne die konventionelle Dichtungseinfassung in eine möglichst paßgenaue Gehausebohrung eingesetzt, wobei der Werkstoff des Filters einen wesentlich höheren Wärmeausdehnungskoeffizienten aufweisen muß als das Material des Gehäuses. Die Abdichtung der Fi lteraufbauten erfolgt bei Betriebstemperatur durch Wärmeausdehnung und die der Spmndusenplatte in beliebiger Weise. Weiterhin wird vorgeschlagen, die Spinndüsenplatte aus einem Werkstoff mit hohem Wärmeausdehnungskoeffizienten zu fertigen und in eine möglichst paßgenaue Bohrung im Gehäuse einzusetzen. In diesem Fall erfolgt die Abdichtung der Spinndüsenplatte bei Betriebstemperatur durch Wär eausdehnung. Die Filteranordnung kann dabei in beliebiger Weise aufgebaut sein und aus einem Material mit beliebigen Wärmeausdehnungskoeffizienten gefertigt sein.According to the invention, filter assemblies made of filter blanks that are cold-pressed together, but without the conventional sealing surround, are inserted into a housing bore that fits as closely as possible, the material of the filter having to have a significantly higher coefficient of thermal expansion than the material of the housing. The fi lter superstructures are sealed at operating temperature by thermal expansion and that of the spout plate in any way. Furthermore, it is proposed to manufacture the spinneret plate from a material with a high coefficient of thermal expansion and to insert it into a bore in the housing that fits as precisely as possible. In this case, the spinneret plate is sealed at operating temperature by thermal expansion. The filter arrangement can be constructed in any way and be made of a material with any thermal expansion coefficient.
Vorzugsweise werden sowohl der Filter aus miteinander kalt verpreßten Filterronden als auch die Spinndüsenplatte aus Werkstoffen mit hohem Wäremeausdehnungskoeffizienten gefertigt und beide Teile in möglichst paßgenaue Bohrungen des aus einem Material mit niedrigem Wärmeausdehnungskoeffizienten gefertigten Gehäuse eingesetzt.Preferably, both the filter made of cold-pressed filter blanks and the spinneret plate are made of materials with a high coefficient of thermal expansion, and both parts are inserted into bores of the housing which are made from a material with a low coefficient of thermal expansion.
Bevorzugt wird die Spinndüsenplatte zusätzlich zu dem vorerwähnten paßgenauen Dichtungssitz in der unteren Hälfte mit einem Gewinde versehen und direkt in das Gehäuse eingeschraubt, wobei das Gewinde und der Anschlag der Düse im Gehäuse so ausgestattet sind, daß das Spinnlochbild immer in der gleichen Ausrichtung zu stehen kommt. Dadurch wird gewährleistet, daß beim Einschrauben bis zum Anschlag die korrekte Anblasung der Fila ente beim Ausspinnen erfolgt.The spinneret plate is preferably provided with a thread in the lower half in addition to the aforementioned precisely fitting sealing seat and screwed directly into the housing, the thread and the stop of the nozzle in the housing being equipped in such a way that the spinning hole pattern is always in the same orientation , This ensures that when the screw is screwed in as far as it will go, the fila duck is correctly blown during spinning.
Vorzugsweise ist das Gehäuse an seinem unteren Ende mit einem überstehenden Kragen versehen, der mindestens drei Nuten zur Aufnahme eines Werkzeuges zum Ein- und Ausschrauben aus dem Spinnsystem hat und der zudem die Düse vor schädlichen Berührungen während des Handlings schützt.The housing is preferably provided at its lower end with a protruding collar which has at least three grooves for receiving a tool for screwing in and unscrewing from the spinning system and which also protects the nozzle from harmful contact during handling.
Der erfindungsgemäße Filtereinsatz vermeidet die Nachteile der klassischen Sandfilterung und der Wegfall der konventionellen Dichtungen bringt deutliche Kostenersparnisse und erhöhte Dichtsicherheit. Durch die geeignete Werkstoff- und Passungsauswahl der Einzelteile der erfindungsgemäßen Spinndüse erfolgt die Dichtwirkung bei Betriebstemperatur durch die erhöhte Ausdehnung der inneren Bauteile, Filter und/oder Düsenplatte, gegenüber dem außenliegenden Gehäuse, ohne daß zusätzliche Dichtelemente erforderlich wären. Weiterhin ist die kurze und kompakte Bauweise vorteilhaft: Kostengünstige Fertigung und leichtere Handhabung bei gleichmäßiger und identischer Filtration von Düse zu Düse.The filter insert according to the invention avoids the disadvantages of classic sand filtering and the elimination of the conventional seals brings significant cost savings and increased Tight security. Due to the suitable choice of material and fit of the individual parts of the spinneret according to the invention, the sealing effect takes place at operating temperature due to the increased expansion of the internal components, filter and / or nozzle plate compared to the external housing, without additional sealing elements being required. The short and compact design is also advantageous: Cost-effective production and easier handling with uniform and identical filtration from nozzle to nozzle.
Die detaillierte Beschreibung einer bevorzugten Ausführung derThe detailed description of a preferred embodiment of the
Erfindung erfolgt anhand der Fig. 1, welche die Darstellung einer beispielhaften Spinndüsenanordnung zeigt: In einem Gehäuse 1 liegt ein kaltgesinterter Filter 2, dessen Aufbau aus für den jeweiligen Spinnprozeß spezifisch ausgewählten einzelnen Lagen von Filterronden verschiedener Filterfeinheit besteht, auf einer Spinndüsenplatte 3 auf. In dieser beispielhaften Spinndüsenanordnung ist die Spinndüsenplatte 3 mittels eines Gewindes in dem Gehäuse 1 befestigt. Dieses Gewinde im Gehäuse 1 und an der Spinndüsenplatte 3 ist dabei so ausgeführt, daß beim Einschrauben bis zum Anschlag das Spinnlochbild immer an der gleichen Stelle zu stehen kommt, so daß die korrekte Anblasung der Filamente beim Ausspinnen gewährleistet ist. Der Anschluß an die Polymerschmelzeversorgung erfolgt über die Anschlußdichtung 4 und (ab hier nicht mehr dargestellt) einen Adapter zum Heizgefäß (auch Spinnbalken genannt). Die Ausführung kann ganz nach den Erfordernissen des Betreibers und an sein vorhandenes Equipment angepaßt werden.The invention is based on FIG. 1, which shows the representation of an exemplary spinneret arrangement: in a housing 1, a cold-sintered filter 2, the structure of which consists of individual layers of filter blanks of different filter fineness specifically selected for the respective spinning process, rests on a spinneret plate 3. In this exemplary spinneret arrangement, the spinneret plate 3 is fastened in the housing 1 by means of a thread. This thread in the housing 1 and on the spinneret plate 3 is designed so that the spinning hole pattern always comes to the same place when screwing in as far as it will go, so that the correct blowing of the filaments is ensured during spinning. The connection to the polymer melt supply is made via the connection seal 4 and (from here no longer shown) an adapter to the heating vessel (also called a spinning beam). The design can be adapted to the needs of the operator and to his existing equipment.
Das Gehäuse 1 besteht zum Beispiel aus Werkstoff Nr. 1.4057 (nach DIN- Stahl Schlüssel) , einem Material mit einem relativ niedrigen Wärmeausdehnungskoeffizienten. Die Spinndüsenplatte 3 kann dann aus Werkstoff Nr. 1.4580 und der Filteraufbau 2 aus Nr. 1.4301 oder 1.4541 gefertigt sein, alles Werkstoffe mit einem relativ hohem Wärmeausdehnungskoeffizienten. Die Passungen werden den Dimensionen und Werkstoffen entsprechend so gewählt, daß die Einzelteile im kalten Zustand leicht zu fügen und wieder zu demontieren sind und einerseits die Dichtwirkung spätestens kurz vor Erreichen der spezifizierten Spinntemperatur erfolgt, und andererseits die Teile bei erhöhter Reinigungstemperatur (ca. 450 ... 540 °C) nicht durch Überdehnung Schaden erleiden.The housing 1 consists, for example, of material no. 1.4057 (according to DIN steel key), a material with a relatively low coefficient of thermal expansion. The spinneret plate 3 can then be made from material No. 1.4580 and the filter assembly 2 from No. 1.4301 or 1.4541, all materials with a relatively high Thermal expansion coefficient. The fits are selected according to the dimensions and materials so that the individual parts are easy to assemble and dismantle when cold and, on the one hand, the sealing effect takes place at the latest shortly before reaching the specified spinning temperature, and on the other hand the parts at an increased cleaning temperature (approx. 450. .. 540 ° C) do not suffer damage from overextension.
Die gewünschte Selbstdichtungsfunktion im Betriebszustand wird ohne konventionelle Dichtungen durch die gezielte Material paarung und Passungsauswahl erreicht: Die vier Teile, Gehäuse 1, Filter 2, Spinndüsenplatte 3 sowie Anschlußdichtung 4, werden in kaltem Zustand montiert und danach aufgeheizt wie üblich. Durch die unterschiedliche Wärmeausdehnung tritt der Dichtungseffekt auf und die Düse kann mit beliebigem Druck angesponnen werden. Das äußere Gehäuse 1 besteht dabei aus einem Werkstoff mit einem relativ niedrigen Wärmeausdehnungskoeffizienten, die inneren Teile, Filter 2 und/oder Spinndüsenplatte 3 sind dagegen aus Materialien mit einem höheren Wärmeausdehnungskoeffizienten gefertigt. Die Einbaumaße werden so gewählt, daß die Teile im kalten Zustand (Raumtemperatur) leicht zu montieren sind, aber bei Spinnbetriebstemperatur (ca. 300 °C) durch die unterschiedliche Ausdehnung sich selbstdichtende Preßpassungen zwischen den Teilen ergeben. Nach Spinnende wird die komplette Düse einer Reinigung unterzogen und erst nach dem Erkalten demontiert. Danach können die Spinndüsenplatte 3 und das Filterelement 2, das so häufig wie eine Filterkerze verwendet werden kann, weiter gereinigt und beschallt werden.The desired self-sealing function in the operating state is achieved without conventional seals by the targeted material pairing and fit selection: The four parts, housing 1, filter 2, spinneret plate 3 and connection seal 4, are installed in the cold state and then heated up as usual. Due to the different thermal expansion, the sealing effect occurs and the nozzle can be spun at any pressure. The outer housing 1 consists of a material with a relatively low coefficient of thermal expansion, the inner parts, filters 2 and / or spinneret plate 3, however, are made of materials with a higher coefficient of thermal expansion. The installation dimensions are selected so that the parts are easy to assemble when cold (room temperature), but at spinning operating temperatures (approx. 300 ° C) the different expansion results in self-sealing press fits between the parts. At the end of the spinning process, the entire nozzle is cleaned and only dismantled after it has cooled. Thereafter, the spinneret plate 3 and the filter element 2, which can be used as often as a filter candle, can be further cleaned and sonicated.
Das hier dargelegte Dichtungsprinzip durch unterschiedliche Wärmeausdehnung ist nicht allein auf die beschriebenen Spinndüsen- und F lteranwendungen beschränkt, sondern kann überall dort eingesetzt werden, wo gefiltert, geschert oder gesponnen werden soll, gleich ob für Mikrofasern, textile Filamente, hochfesten Reifencord oder sonstige Anwendungen. Dabei bleibt es dem zuständigen Produkt- oder Anwendungsfachmann überlassen, die Ausgestaltung bezüglich der Wahl der kaltgesinterten Filter, der Werkstoffe und der Passungen für seinen speziellen Fall zu bestimmen oder empirisch zu ermitteln.The sealing principle presented here due to different thermal expansion is not limited to the described spinneret and filter applications, but can be used anywhere wherever you want to filter, shear or spin, whether for microfibers, textile filaments, high-strength tire cord or other applications. It is up to the responsible product or application specialist to determine or empirically determine the design with regard to the choice of cold-sintered filters, the materials and the fits for his particular case.
Bezeichnungsliste:Name list:
1. Gehäuse1. Housing
2. Filteraufbau, Filter 3. Spinndüsenplatte, Düsenplatte2. Filter structure, filter 3. Spinneret plate, nozzle plate
4. Anschlußdichtung 4. Connection seal

Claims

Patentansprüche: claims:
1. Spinndüse zum Verspinnen von Thermoplasten mit einem zentralen Polymerschmelzeeintrittskanal , einer Filteranordnung (2), bestehend aus mehreren Filterronden verschiedener Filterfeinheit, die miteinander durch kalte Verpreßung fest miteinander verbunden sind, einer Spinndüsenplatte (3) und einem die Filteranordnung (2) und die Spinndüsenplatte (3) aufnehmenden und eng umschließenden Gehäuse (1), dadurch gekennzeichnet, daß besagte Filteranordnung (2) keine Dichtungseinfassung aufweist und aus einem Werkstoff mit einem höheren Wärmeausdehnungskoeffizienten besteht, als der des Materials aus dem das sie umschließende Gehäuse (1) gefertigt ist.1. Spinneret for spinning thermoplastics with a central polymer melt inlet channel, a filter arrangement (2), consisting of several filter rounds of different filter fineness, which are firmly connected to one another by cold pressing, a spinneret plate (3) and one the filter arrangement (2) and the spinneret plate (3) accommodating and closely enclosing housing (1), characterized in that said filter arrangement (2) has no sealing surround and consists of a material with a higher coefficient of thermal expansion than that of the material from which the housing (1) enclosing it is made.
2. Spinndüse zum Verspinnen von Thermoplasten mit einem zentralen Polymerschmelzeeintrittskanal, einer Filteranordnung (2), bestehend aus einer oder mehreren Filterronden verschiedener Filterfeinheit und beliebiger Art, einer Spinndüsenplatte (3) und einem die Filteranordnung (2) und die Spinndüsenplatte (3) aufnehmenden und umschließenden Gehäuse (1), dadurch gekennzeichnet, daß die Spinndüsenplatte (3) aus einem Werkstoff mit einem höheren Wärmeausdehnungskoeffizienten besteht, als der des Materials aus dem das sie umschließenden Gehäuse (1) gefertigt ist.2.Spinneret for spinning thermoplastics with a central polymer melt inlet channel, a filter arrangement (2), consisting of one or more filter rounds of different filter fineness and of any type, a spinneret plate (3) and a filter arrangement (2) and the spinneret plate (3) and enclosing housing (1), characterized in that the spinneret plate (3) consists of a material with a higher coefficient of thermal expansion than that of the material from which the housing (1) enclosing it is made.
3. Spinndüse zum Verspinnen von Thermoplasten mit einem zentralen Polymerschmelzeeintrittskanal, einer Filteranordnung (2), bestehend aus mehreren Filterronden verschiedener Filterfeinheit, die miteinander durch kalte Verpreßung fest miteinander verbunden sind, einer Spinndüsenplatte (3) und einem die Filteranordnung (2) und die Spinndüsenplatte (3) aufnehmenden und eng umschließenden Gehäuse (1), dadurch gekennzeichnet, daß besagte Filteranordnung (2) keine Dichtungseinfassung aufweist und Filteranordnung (2) und Spinndüsenplatte (3) aus Werkstoffen mit einem höheren Wärmeausdehnungskoeffizienten bestehen, als der des Materials aus dem das sie umschließende Gehäuse (1) gefertigt ist.3. Spinneret for spinning thermoplastics with a central polymer melt inlet channel, a filter arrangement (2), consisting of several filter rounds of different filter fineness, which are firmly connected to one another by cold pressing, a spinneret plate (3) and one, the filter arrangement (2) and the spinneret plate (3) receiving and closely enclosing housing (1), characterized in that said filter arrangement (2) has no seal surround and filter arrangement (2) and spinneret plate (3) consist of materials with a higher coefficient of thermal expansion than that of the material from which the housing (1) enclosing them is made.
4. Spinndüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Spinndüsenplatte (3) und/oder die Filteranordnung (2) aus austenitischen Stählen, wie z. B. Nr. 1.4301, 1.4541, 1.4580 oder einem Werkstoff mit einem ähnlich hohen Wärmeausdehnungskoeffizienten bestehen, und daß das sie umschließende Gehäuse (1) aus einem Material mit einem niedrigeren Wärmeausdehnungskoeffizienten, wie z. B. Nr. 1.4057 oder einem ähnlichen Chromstahl oder warmfesten Material gefertigt ist.4. Spinneret according to one of claims 1 to 3, characterized in that the spinneret plate (3) and / or the filter arrangement (2) made of austenitic steels, such as. B. No. 1.4301, 1.4541, 1.4580 or a material with a similarly high coefficient of thermal expansion, and that the enclosing housing (1) made of a material with a lower coefficient of thermal expansion, such as. B. No. 1.4057 or a similar chrome steel or heat-resistant material.
5. Spinndüse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Dimensionierung so gewählt wird, daß die Passung zwischen dem Außendurchmesser der Spinndüsenplatte (3) und/oder der Filteranordnung (2) einerseits und der sie aufnehmenden Bohrung im umschließenden Gehäuse (1) andererseits bei Raumtemperatur eine leichte Spielpassung ergibt, die sich bei Betriebstemperatur aufgrund der unterschiedlichen Ausdehnung der Teile in eine selbstdichtende radiale Preßpassung wandelt.5. Spinneret according to one of claims 1 to 4, characterized in that the dimensioning is chosen so that the fit between the outer diameter of the spinneret plate (3) and / or the filter arrangement (2) on the one hand and the bore receiving them in the enclosing housing ( 1) on the other hand there is a slight clearance fit at room temperature, which changes into a self-sealing radial press fit at operating temperature due to the different expansion of the parts.
6. Spinndüse nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Spinndüsenplatte (3) aus einem Werkstoff mit einem höheren Wärmeausdehnungskoeffizienten besteht, als der des Materials des sie umschließenden Gehäuses (1), und daß die Spiπndüsenplatte (3) in ihrer unteren Hälfte zusätzlich mit einem Gewinde versehen ist und direkt in das Gehäuse (1) eingeschraubt wird, wobei das Gewinde und der Anschlag der Spinndüsenplatte (3) im Gehäuse (1) so ausgestaltet sind, daß das Spinnlochbild immer in der gleichen Ausrichtung zu stehen kommt, so daß gewährleistet ist, daß beim Einschrauben bis zum Anschlag die korrekte Anblasung der Filamente beim Ausspinnen erfolgt.6. Spinneret according to one of claims 2 to 5, characterized in that the spinneret plate (3) consists of a material with a higher coefficient of thermal expansion than that of the material of the housing enclosing it (1), and that the spinneret plate (3) in it lower half is additionally provided with a thread and is screwed directly into the housing (1), the thread and the stop of the spinneret plate (3) in the housing (1) being designed such that the spinning hole pattern is always comes in the same orientation, so that it is ensured that when screwing in up to the stop, the filaments are correctly blown during spinning.
Spinndüse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Gehäuse (1) an seinem unteren Ende einen überstehenden Kragen hat, der mindestens drei Nuten zur Aufnahme eines Werkzeuges zum Ein- und Ausschrauben aus dem Spinnsystem aufweist und die Spinndüsenplatte (3) vor schädlichen Berührungen während der Handhabung schützt. Spinning nozzle according to one of claims 1 to 6, characterized in that the housing (1) has at its lower end a protruding collar which has at least three grooves for receiving a tool for screwing in and out of the spinning system and the spinneret plate (3) protects against harmful touches during handling.
EP00942123A 1999-07-30 2000-06-24 Self-sealing compact spinneret for a melt spinning process Expired - Lifetime EP1208250B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19935982 1999-07-30
DE19935982A DE19935982A1 (en) 1999-07-30 1999-07-30 Self-sealing compact nozzle for melt spinning processes
PCT/EP2000/005840 WO2001009413A1 (en) 1999-07-30 2000-06-24 Self-sealing compact spinneret for a melt spinning process

Publications (2)

Publication Number Publication Date
EP1208250A1 true EP1208250A1 (en) 2002-05-29
EP1208250B1 EP1208250B1 (en) 2003-11-26

Family

ID=7916675

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Application Number Title Priority Date Filing Date
EP00942123A Expired - Lifetime EP1208250B1 (en) 1999-07-30 2000-06-24 Self-sealing compact spinneret for a melt spinning process

Country Status (6)

Country Link
US (1) US6716016B1 (en)
EP (1) EP1208250B1 (en)
AT (1) ATE255177T1 (en)
AU (1) AU5685100A (en)
DE (2) DE19935982A1 (en)
WO (1) WO2001009413A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1296530C (en) * 2001-09-28 2007-01-24 苏拉有限及两合公司 Spinneret for melt spinning filaments
DE10314294A1 (en) 2003-03-29 2004-10-07 Saurer Gmbh & Co. Kg Device for melt spinning
CN1766180B (en) * 2004-10-30 2010-05-05 苏拉有限及两合公司 Spinning manifold
DE102007034092A1 (en) 2007-07-21 2009-01-22 Oerlikon Textile Gmbh & Co. Kg Melt-spinning device for synthetic filaments has inside diameter of inner wall of sealing sleeve continuously reducing in region of second and third section of wall
JP2015081400A (en) * 2013-10-24 2015-04-27 Ｔｍｔマシナリー株式会社 Spinning pack
CN105420824B (en) * 2016-01-09 2017-08-01 浙江恒百华化纤有限公司 A kind of filament spinning component and its spinning process
CN113981616B (en) * 2021-11-26 2023-10-20 辽宁盛京堂新材料科技有限公司 Melt-blowing device and process for manufacturing inactivated virus melt-blowing cloth

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US3724064A (en) * 1970-07-02 1973-04-03 Mott Metallurg Corp Sealing method
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See references of WO0109413A1 *

Also Published As

Publication number Publication date
DE19935982A1 (en) 2001-02-01
US6716016B1 (en) 2004-04-06
EP1208250B1 (en) 2003-11-26
AU5685100A (en) 2001-02-19
WO2001009413A1 (en) 2001-02-08
ATE255177T1 (en) 2003-12-15
DE50004580D1 (en) 2004-01-08

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