WO2011076525A1 - Device for continuous casting strands made of thermoplastic plastic - Google Patents

Device for continuous casting strands made of thermoplastic plastic Download PDF

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Publication number
WO2011076525A1
WO2011076525A1 PCT/EP2010/068459 EP2010068459W WO2011076525A1 WO 2011076525 A1 WO2011076525 A1 WO 2011076525A1 EP 2010068459 W EP2010068459 W EP 2010068459W WO 2011076525 A1 WO2011076525 A1 WO 2011076525A1
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WO
WIPO (PCT)
Prior art keywords
strands
row
nozzles
plastic
continuous casting
Prior art date
Application number
PCT/EP2010/068459
Other languages
German (de)
French (fr)
Inventor
Stefan Dahlheimer
Original Assignee
Automatik Plastics Machinery 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 Automatik Plastics Machinery Gmbh filed Critical Automatik Plastics Machinery Gmbh
Publication of WO2011076525A1 publication Critical patent/WO2011076525A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/355—Conveyors for extruded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling

Definitions

  • the invention relates to a device for continuous casting of strands of thermoplastic material, which emerge from at least one straight row of nozzles from a nozzle head for further processing in a granulator.
  • Such a device is shown and described in DE 4 026 337.
  • strands of liquid plastic are pressed out of a series of nozzles to which the plastic is supplied in liquid form.
  • the individual plastic strands emerging from the nozzles drop to one immediately after exiting the nozzles
  • Granulator supplied which provides the desired in this process plastic granules.
  • the invention is therefore based on the object to prevent such Verklebungs part of plastic strands after exiting the nozzle with certainty, according to the invention this is done by a device which is characterized in that parallel and adjacent to a series of nozzle openings at least one hole arrangement is provided which is directed onto the row of strands emerging from the nozzles and charged with a pressurized fluid which, as a fluid veil, flows around the row of leaked strands.
  • Plastic strands obtained immediately after exiting the nozzles which problems of any contact with the first superficially particularly sticky plastic strands is avoided with certainty and the plastic strands in any case superficially cooled reach the chute on which they are then further cooled in a known manner and then granulated can be.
  • the hole arrangement for the admission of the pressure fluid can be designed as a series of individual holes which are arranged as a straight hole arrangement either one-sided or both sides of the nozzles so that immediately after exiting the nozzle openings, the initially still molten plastic strands are sprayed from the side , with which these the holes
  • Adhesion tendency is largely taken.
  • the hole arrangement for the supply of the pressurized fluid can also be designed as a longitudinal gap.
  • a longitudinal gap is compared to a hole assembly with a series of holes a structurally simple design, in which, however, a correspondingly higher demand for pressurized fluid is required.
  • Figure 1 is a side view of the device with the nozzle row for the exit of the plastic strands and adjacent hole arrangements for the admission of a pressurized fluid.
  • Figure 2 is a plan view of the nozzle head with the row of nozzle openings and two
  • FIG. 4 shows the device in a perspective view with a design according to FIG. 1.
  • Figure 1 shows the device in side view.
  • the molten plastic strands 1 emerge from a reactor 2, to which the respective plastic to be processed is supplied in liquid form.
  • a reactor 2 On the underside of the reactor 2 there is a series of nozzles 3 explained in more detail with reference to FIG. 2, from which the plastic in each case emerges as a strand and is collected by a chute 4, which is charged in a known manner with a water flowing down therefrom that the strands guided by the chute and its extension 5 continue to be constantly lapped with water.
  • the two longitudinal gaps 6 and 7 are arranged, from which the pressurized fluid flows out under pressure and, due to the alignment of the longitudinal gaps 6 and 7, directs this directly onto the strands 1.
  • the longitudinal gaps 6 and 7 are supplied with the pressurized fluid via the feeders 8 and 9.
  • the plastic strands 1 to be sliced are immediately supplied with a cooling medium, preferably water, which reaches the plastic strands 1 exiting there directly at the nozzle openings 3 and flows around them, thus ensuring mutual adhesion of the plastic strands with certainty in the direction of the chute 4 prevented.
  • FIG. 2 shows a plan view of the nozzle openings 3.
  • longitudinal columns 6 and 7 can also each have a row of holes with individual holes 10 and 1 1 occur, which are individually arranged side by side so close that practically a
  • FIG. 4 the overall arrangement of a device for continuous casting of strands of thermoplastic material together with the other organs for the processing of Plastic strands shown, with recourse to FIG.
  • a nozzle arrangement and hole arrangement is used, as shown in FIG. In the apparatus of Figure 4, therefore, a series of nozzles 3 is used, which cooperates with the longitudinal columns 6 and 7.
  • the plastic strands 1 guided over the chute 4/5 finally reach the granulator, where they are cut into granules in the desired manner.
  • Essentially water or inerting gas is used as the pressurized fluid, which primarily prevents oxidation of the small plastic strands.

Abstract

The invention relates to a device for continuous casting of strands (1) made of thermoplastic plastic, which strands emerge from a nozzle head (2) from at least one straight row of nozzles (3) for further processing in a granulator. At least one hole arrangement (6, 7) parallel and adjacent to a series of nozzles (3) is provided, which is directed toward the row of strands (1) emerging from the nozzles (3) and is coated by a pressure fluid, which flows around the row of emerged strands as a fluid curtain.

Description

Vorrichtung zum Stranggießen von Strängen  Apparatus for continuous casting of strands
thermoplastischem Kunststoff  thermoplastic
Die Erfindung bezieht sich auf eine Vorrichtung zum Stranggießen von Strängen aus thermopiastischem Kunststoff, die aus mindestens einer geraden Reihe von Düsen aus einem Düsenkopf austreten zur Weiterverarbeitung in einem Granulator. The invention relates to a device for continuous casting of strands of thermoplastic material, which emerge from at least one straight row of nozzles from a nozzle head for further processing in a granulator.
Eine derartige Vorrichtung ist in der DE 4 026 337 dargestellt und beschrieben. Mit einer derartigen bekannten Vorrichtung werden Stränge aus flüssigem Kunststoff aus einer Reihe von Düsen ausgepresst, denen der Kunststoff in flüssiger Form zugeführt wird. Die einzelnen aus den Düsen austretenden Kunststoffstränge fallen unmittelbar nach dem Austritt aus den Düsen auf eine Such a device is shown and described in DE 4 026 337. With such a known device strands of liquid plastic are pressed out of a series of nozzles to which the plastic is supplied in liquid form. The individual plastic strands emerging from the nozzles drop to one immediately after exiting the nozzles
Wasserrutsche, die auf ihrer einen Seite mit Kühlwasser beschickt wird, das auf der abschüssigen Rutsche herabläuft und dabei die aus den Düsen auf die Rutsche herabfallenden Stränge mitnimmt und oberflächlich abkühlt. Danach werden dann in bekannter Weise die Stränge geführt und einem Water slide, which is fed on its one side with cooling water, which runs down the sloping slide, taking along the falling from the nozzles on the slide strands and superficially cools. Thereafter, the strands are then performed in a known manner and a
Granulator zugeführt, der das bei diesem Verfahren erwünschte Kunststoffgranulat liefert. Granulator supplied which provides the desired in this process plastic granules.
Problematisch ist bei dieser Art der Förderung der zunächst schmeizflüssigen Kunststoffstränge die seitliche Beweglichkeit der Kunststoffstränge auf der Rutsche, die leicht zu einem Aufeinandertreffen der Kunststoffstränge und damit einem Verkleben der Stränge führt. Aus diesem Grund hat man verschiedene Methoden der Führung der Kunststoff stränge auf der Rutsche verwendet, z. B. Rillen als Führungen für die Stränge oder ein besonders schneller Wasserstrom auf der Rutsche, wodurch gewährleistet werden soll, dass bei dem Transport der Stränge über die Rutsche diese stets einen Mindestabstand voneinander einhalten. Dieser Übergang von den Düsen zu der Rutsche hat sich häufig als problematisch erwiesen, weil die Kunststoffstränge gelegentlich dazu neigen, sich aufgrund einer gewissen Abstützung auf der Rutsche aneinander anzunähern und zu verkleben, so dass es sich gezeigt hat, dass nicht immer ein störungsfreier Dauerbetrieb mit derartigen Anlagen möglich ist. Der Erfindung liegt daher die Aufgabe zugrunde, derartige Verklebungsfälle von Kunststoffsträngen nach dem Austritt aus den Düsen mit Sicherheit zu verhindern, Erfindungsgemäß geschieht dies durch eine Vorrichtung, die dadurch gekennzeichnet ist, dass parallel und benachbart zu einer Reihe von Düsenöffnungen mindestens eine Lochanordnung vorgesehen ist, die auf die Reihe der aus den Düsen austretenden Stränge gerichtet und mit einem Druckfluid beschickt ist, das als Fluidschleier die Reihe von ausgetretenen Strängen umspült. The problem with this type of promotion of the initially plastic slips plastic is the lateral mobility of the plastic strands on the slide, which easily leads to a clash of plastic strands and thus sticking of the strands. For this reason, one has used various methods of guiding the plastic strands on the slide, z. B. grooves as guides for the strands or a particularly fast water flow on the chute, which is to ensure that in the transport of the strands on the chute these always maintain a minimum distance from each other. This transition from the nozzles to the chute has often proved problematic because the plastic strands occasionally tend to approach and stick together due to some support on the chute so that it has been shown that not always a trouble-free continuous operation with such systems is possible. The invention is therefore based on the object to prevent such Verklebungsfälle of plastic strands after exiting the nozzle with certainty, according to the invention this is done by a device which is characterized in that parallel and adjacent to a series of nozzle openings at least one hole arrangement is provided which is directed onto the row of strands emerging from the nozzles and charged with a pressurized fluid which, as a fluid veil, flows around the row of leaked strands.
Mit dieser Vorrichtung lässt sich eine Umspülung der schmelzflüssigen Kunststoffstränge schon unmittelbar nach dem Austreten aus einer Düse erzielen, womit den Kunststoffsträngen auf ihrem Wege vom Düsenkopf zu einer Rutsche sofort eine Behandlung gegeben wird, die den Kunststoffsträngen aufgrund der sich ergebenden Oberflächenabkühlung, die Tendenz nimmt, sich aneinander anzunähern und sich miteinander zu verkleben. Es wird also eine sichere störungsfreie Führung der With this device, a rinsing of the molten plastic strands can be achieved immediately after exiting a nozzle, whereby the plastic strands on their way from the nozzle head to a slide immediately given a treatment that takes the plastic strands due to the resulting surface cooling, the tendency to approach each other and to stick together. So it is a safe trouble-free management of
Kunststoffstränge unmittelbar nach dem Austritt aus den Düsen erzielt, womit Probleme irgendeiner Berührung der zunächst noch oberflächlich besonders klebrigen Kunststoffstränge mit Sicherheit vermieden wird und die Kunststoffstränge auf jeden Fall oberflächlich abgekühlt die Rutsche erreichen, auf der sie dann in bekannter Weise weiterhin gekühlt werden und danach granuliert werden können. Plastic strands obtained immediately after exiting the nozzles, which problems of any contact with the first superficially particularly sticky plastic strands is avoided with certainty and the plastic strands in any case superficially cooled reach the chute on which they are then further cooled in a known manner and then granulated can be.
Die Lochanordnung für den Zutritt des Druckfluids kann man als eine Reihe von einzelnen Löchern gestalten, die als geradlinige Lochanordnung entweder einseitig oder beidseitig zu den Düsen so angeordnet sind, dass unmittelbar nach Austritt aus den Düsenöffnungen die zunächst noch schmelzflüssigen Kunststoffstränge von der Seite her beschleiert werden, womit diesen die The hole arrangement for the admission of the pressure fluid can be designed as a series of individual holes which are arranged as a straight hole arrangement either one-sided or both sides of the nozzles so that immediately after exiting the nozzle openings, the initially still molten plastic strands are sprayed from the side , with which these the
Klebeneigung weitestgehend genommen wird. Adhesion tendency is largely taken.
Die Lochanordnung für die Zuführung des Druckfluids kann auch als Längsspalt ausgebildet sein. Ein Längsspalt ist gegenüber einer Lochanordnung mit einer Reihe von Löchern eine konstruktiv einfache Gestaltung, bei der allerdings auch ein entsprechend höherer Bedarf an Druckfluid erforderlich ist. The hole arrangement for the supply of the pressurized fluid can also be designed as a longitudinal gap. A longitudinal gap is compared to a hole assembly with a series of holes a structurally simple design, in which, however, a correspondingly higher demand for pressurized fluid is required.
In den Figuren ist ein Ausfühmngsbeispiel der Erfindung dargestellt. Es zeigen: Figur 1 eine Seitensicht der Vorrichtung mit der Düsenreihe für den Austritt der Kunststoffstränge und benachbarten Lochanordnungen für den Zutritt eines Druckfluids; In the figures, an embodiment of the invention is shown. Figure 1 is a side view of the device with the nozzle row for the exit of the plastic strands and adjacent hole arrangements for the admission of a pressurized fluid.
Figur 2 eine Draufsicht auf den Düsenkopf mit der Reihe von Düsenöffnungen und zwei Figure 2 is a plan view of the nozzle head with the row of nozzle openings and two
benachbarten Lochanordnungen; Figur 3 eine Abwandlung der Gestaltung der Figur 2, bei der die Lochanordnung jeweils als Längsspalt ausgebildet ist; Figur 4 die Vorrichtung in perspektivischer Sicht mit einer Gestaltung gemäß Figur 1. adjacent hole arrangements; Figure 3 shows a modification of the design of Figure 2, wherein the hole assembly is formed in each case as a longitudinal gap; FIG. 4 shows the device in a perspective view with a design according to FIG. 1.
Figur 1 zeigt die Vorrichtung in Seitensicht. Die schmelzflüssigen Kunststoffstränge 1 treten aus einem Reaktor 2 aus, dem der jeweils zu verarbeitende Kunststoff in flüssiger Form zugeführt wird. An der Unterseite des Reaktors 2 befindet sich eine anhand der Figur 2 näher erläuterte Reihe von Düsen 3, aus denen der Kunststoff jeweils als Strang austritt und von einer Rutsche 4 aufgefangen wird, die in bekannter Weise mit einem auf ihr herabfließenden Wasser beschickt wird, so dass die von der Rutsche und ihrer Verlängerung 5 geführten Stränge weiterhin ständig mit Wasser umspült sind. Neben der Reihe von Düsenöffnungen 3 sind die beiden Längsspalten 6 und 7 angeordnet, aus denen das Druckfluid unter Druck ausströmt und aufgrund der Ausrichtung der Längsspalten 6 und 7 dieses direkt auf die Stränge 1 richtet. Die Längsspalten 6 und 7 werden mit dem Druckfluid über die Zuführungen 8 und 9 versorgt. Aufgrund dieser Gestaltung wird den schmeizflüssig auftretenden Kunststoffsträngen 1 sofort ein Kühlmedium zugeführt, vorzugsweise Wasser, das unmittelbar an den Düsenöffnungen 3 die dort austretenden Kunststoffstränge 1 erreicht und diese umspült und somit bei der Weiterführung in Richtung zu der Rutsche 4 ein gegenseitiges Verkleben der Kunststoffstränge mit Sicherheit verhindert. Figure 1 shows the device in side view. The molten plastic strands 1 emerge from a reactor 2, to which the respective plastic to be processed is supplied in liquid form. On the underside of the reactor 2 there is a series of nozzles 3 explained in more detail with reference to FIG. 2, from which the plastic in each case emerges as a strand and is collected by a chute 4, which is charged in a known manner with a water flowing down therefrom that the strands guided by the chute and its extension 5 continue to be constantly lapped with water. In addition to the row of nozzle openings 3, the two longitudinal gaps 6 and 7 are arranged, from which the pressurized fluid flows out under pressure and, due to the alignment of the longitudinal gaps 6 and 7, directs this directly onto the strands 1. The longitudinal gaps 6 and 7 are supplied with the pressurized fluid via the feeders 8 and 9. As a result of this design, the plastic strands 1 to be sliced are immediately supplied with a cooling medium, preferably water, which reaches the plastic strands 1 exiting there directly at the nozzle openings 3 and flows around them, thus ensuring mutual adhesion of the plastic strands with certainty in the direction of the chute 4 prevented.
Die Anordnung der Düsenöffnungen 3 und der Längsspalten 6 und 7 sei anhand der Figur 2 verdeutlicht, die eine Draufsicht auf die Düsenöffnungen 3 zeigt. The arrangement of the nozzle openings 3 and the longitudinal gaps 6 and 7 will be clarified with reference to FIG. 2, which shows a plan view of the nozzle openings 3.
Gemäß Figur 3 liegt die Reihe mit den Düsenöffnungen 3 in der Mitte zwischen den Lochreihen 6 und 7, durch die das Druckfluid, wie in Figur 1 dargestellt, ausströmt und auf die aus den Düsen 3 According to Figure 3, the row with the nozzle openings 3 in the middle between the rows of holes 6 and 7, through which the pressurized fluid, as shown in Figure 1, flows out and on from the nozzles. 3
austretenden Kunststoffstränge gerichtet ist. issuing plastic strands is directed.
Anstelle der Längsspalten 6 und 7 kann auch jeweils eine Lochreihe mit einzelnen Löchern 10 und 1 1 treten, die einzeln nebeneinander so dicht angeordnet sind, dass sich damit praktisch ein Instead of the longitudinal columns 6 and 7 can also each have a row of holes with individual holes 10 and 1 1 occur, which are individually arranged side by side so close that practically a
durchgehender Strahl von Druckfluid ergibt, wie er gemäß der Anordnung nach Figur 2 aus den beiden Längsspalten 6 und 7 austritt. continuous jet of pressurized fluid results, as it emerges from the two longitudinal columns 6 and 7 according to the arrangement of Figure 2.
In der Figur 4 ist die Gesamtanordnung einer Vorrichtung zum Stranggießen von Strängen aus thermoplastischem Kunststoff zusammen mit den weiteren Organen für die Verarbeitung der Kunststoffstränge dargestellt, wobei auf die Figur 2 zurückgegriffen wird. Gemäß Figur 4 wird nämlich eine Düsenanordnung und Lochanordnung verwendet, wie sie in der Figur 2 dargestellt ist. Bei der Vorrichtung gemäß Figur 4 wird also eine Reihe von Düsen 3 verwendet, die mit den Längsspalten 6 und 7 zusammenarbeitet, Die über die Rutsche 4/5 geleiteten Kunststoffstränge 1 gelangen schließlich in den Granulator, wo sie in gewünschter Weise zu Granulat geschnitten werden. In Figure 4, the overall arrangement of a device for continuous casting of strands of thermoplastic material together with the other organs for the processing of Plastic strands shown, with recourse to FIG. In fact, according to FIG. 4, a nozzle arrangement and hole arrangement is used, as shown in FIG. In the apparatus of Figure 4, therefore, a series of nozzles 3 is used, which cooperates with the longitudinal columns 6 and 7. The plastic strands 1 guided over the chute 4/5 finally reach the granulator, where they are cut into granules in the desired manner.
Als Druckfluid wird im Wesentlichen Wasser oder Inertievierungsgas verwendet, das vor allem ein Oxidieren der kleinen Kunststoffstränge verhindert. Essentially water or inerting gas is used as the pressurized fluid, which primarily prevents oxidation of the small plastic strands.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Vorrichtung zum Stranggießen von Strängen (1) aus thermoplastischem Kunststoff, die aus mindestens einer geraden Reihe von Düsen (3) aus einem Düsenkopf austreten zur Weiterverarbeitung in einem Granulator, dadurch gekennzeichnet, dass parallel und benachbart zu einer Reihe von Düsen (3) mindestens eine Lochanordnung (6, 7) vorgesehen ist, die auf die Reihe der aus den Düsen (3) austretenden Stränge (1 ) gerichtet und mit einem Druckfluid beschickt ist, das als Fluidschleier die Reihe von ausgetretenen Strängen umspült. 1. An apparatus for continuous casting of strands (1) of thermoplastic material, which emerge from a nozzle head from at least one straight row of nozzles (3) for further processing in a granulator, characterized in that parallel and adjacent to a row of nozzles (3) at least one hole arrangement (6, 7) is provided which is directed onto the row of strands (1) emerging from the nozzles (3) and charged with a pressurized fluid which, as a fluid veil, flows around the row of escaped strands.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass jeweils neben einer Reihe von Düsen (3) beidseitig je eine Lochanordnung (6, 7) vorgesehen ist. 2. Apparatus according to claim 1, characterized in that in each case adjacent to a row of nozzles (3) on both sides each have a hole arrangement (6, 7) is provided.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Lochanordnung als Längsspalt (6,7) ausgebildet ist. 3. Apparatus according to claim 1 or 2, characterized in that the hole arrangement is formed as a longitudinal gap (6,7).
4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Lochanordnung als Lochreihe (10, 11) ausgebildet ist. 4. Apparatus according to claim 1 or 2, characterized in that the hole arrangement as a row of holes (10, 11) is formed.
PCT/EP2010/068459 2009-12-23 2010-11-30 Device for continuous casting strands made of thermoplastic plastic WO2011076525A1 (en)

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DE102009059306.3 2009-12-23
DE102009059306A DE102009059306A1 (en) 2009-12-23 2009-12-23 Apparatus for continuous casting of strands of thermoplastic material

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CN103266359A (en) * 2013-05-31 2013-08-28 吉铨精密机械(苏州)有限公司 Diffuser plate of thread casting belt head

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