DE3126125C1 - Foamed polystyrene sheeting prodn. - where extruder ring nozzle is adjusted by moving tapered corepiece longitudinally with accessible outer nut - Google Patents

Foamed polystyrene sheeting prodn. - where extruder ring nozzle is adjusted by moving tapered corepiece longitudinally with accessible outer nut

Info

Publication number
DE3126125C1
DE3126125C1 DE3126125A DE3126125A DE3126125C1 DE 3126125 C1 DE3126125 C1 DE 3126125C1 DE 3126125 A DE3126125 A DE 3126125A DE 3126125 A DE3126125 A DE 3126125A DE 3126125 C1 DE3126125 C1 DE 3126125C1
Authority
DE
Germany
Prior art keywords
mandrel
ring nozzle
displacement
nozzle
central
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
Application number
DE3126125A
Other languages
German (de)
Inventor
Klaus-Dieter 3101 Hambüren Kolossow
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.)
KraussMaffei Extrusion GmbH
Original Assignee
Hermann Berstorff Maschinenbau 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 Hermann Berstorff Maschinenbau GmbH filed Critical Hermann Berstorff Maschinenbau GmbH
Priority to DE3126125A priority Critical patent/DE3126125C1/en
Application granted granted Critical
Publication of DE3126125C1 publication Critical patent/DE3126125C1/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/36Feeding the material to be shaped
    • B29C44/46Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/507Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through an annular die
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001Combinations of extrusion moulding with other shaping operations
    • B29C48/0019Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion 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
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Foam plastics sheeting is produced using an extruder with a ring nozzle whose aperture is adjusted by moving its tapered central corepiece axially, a cooled dimensioning tool of larger dia. than the nozzle and a slitter for the tubing and a device to lay it flat. The nozzle corepiece slides over a central fixed guide rod and is attached at one end to a tube passing through the dimensioning tool; this tube is moved axially over the central guide rod by means of a coaxial threaded adjusting device. The design provides simple adjustment for the ring nozzle gap with minimal interruption to prod.

Description

Wird die Verstellmutter 24 von der Bedienungsperson gedreht, so verschiebt sich damit zwangsläufig die Hülse 18 und der daran angebrachte Verdrängungsdorn 14 in axialer Richtung. Dadurch wird je nach der Drehrichtung der Verstellmutter 24 der Ringspalt der Ringdüse 6 in seiner Weite verkleinert oder vergrößert. If the adjusting nut 24 is rotated by the operator, it shifts This inevitably causes the sleeve 18 and the displacement mandrel attached to it 14 in the axial direction. This will depend on the direction of rotation of the adjusting nut 24 the annular gap of the Ring nozzle 6 reduced in width or enlarged.

Da die Verstellmutter 24 außerhalb der Schaumstoffblase 7 liegt, ist ein Verstellen des Ringspaltes auch während des Betriebes der Vorrichtung zur Herstellung von Schaumstoffolien möglich.Since the adjusting nut 24 is outside the foam bladder 7, is an adjustment of the annular gap also during operation of the device for production of foam sheets possible.

- Leerseite -- blank page -

Claims (2)

Patentansprüche: 1. Vorrichtung zum Herstellen von Folien aus expandierbarem Kunststoff mit einer Schneckenstrangpresse, die an ihrem Austrittsende mit einer Ringdüse versehen ist, deren Spaltgröße durch axiales Verschieben des zentralen Verdrängungsdornes einstellbar ist, und mit einem der Ringdüse in Extrusionsrichtung nachgeordneten gekühlten Kalibrierdorn größeren Durchmessers als die Ringdüse und mit einer den im Durchmesser vergrößerten, abgekühlten Schaumstoffschlauch aufschneidenden Schneidvorrichtung sowie einer Flachlegevorrichtung, dadurch gekennzeichnet, daß der Verdrängungsdorn (14) in koaxialer Anordnung auf einem zentralen, gehäusefesten Führungsdorn (16) gleitet, daß der Verdrängungsdorn (14) stirnseitig mit einer den Kalibrierdorn (8) durchdringenden Hülse (18) verbunden ist, die über eine koaxiale Schraubverbindung relativ zum Führungsdorn in axialer Richtung verschiebbar ist. Claims: 1. Device for producing foils from expandable Plastic with a screw extruder, which at its outlet end with a Ring nozzle is provided, the gap size by axially moving the central Displacement mandrel is adjustable, and with one of the ring nozzle in the extrusion direction downstream cooled calibration mandrel with a larger diameter than the ring nozzle and with a cut open the enlarged diameter, cooled foam tube Cutting device and a flattening device, characterized in that the displacement mandrel (14) in a coaxial arrangement on a central, fixed to the housing Guide mandrel (16) slides that the displacement mandrel (14) end face with one of the Calibrating mandrel (8) penetrating sleeve (18) is connected via a coaxial Screw connection is displaceable relative to the guide mandrel in the axial direction. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Hülse (18) am anderen, aus dem Kalibrierdorn (8) herausragenden Ende mit einer drehbaren Verstellmutter (24) verbunden ist, durch die eine koaxiale Gewindestange (26) geführt ist, die mit dem zentralen, gehäusefesten Führungsdorn (16) starr verbunden ist. 2. Apparatus according to claim 1, characterized in that the sleeve (18) at the other end protruding from the calibration mandrel (8) with a rotatable one Adjusting nut (24) is connected, through which a coaxial threaded rod (26) is guided is, which is rigidly connected to the central, housing-fixed guide pin (16). Die Erfindung betrifft eine Vorrichtung zum Herstellen von Folien aus expandierbarem Kunststoff nach dem Oberbegriff des Patentanspruches 1. The invention relates to a device for producing films made of expandable plastic according to the preamble of claim 1. Um die Dickeneinstellung einer als Schlauch extrudierten Schaumstoffolie zu bewerkstelligen, ist es bekannt, den Ringspalt der Ringdüse durch axiales Verschieben des zentralen Verdrängungsdornes stufenlos zu verstellen. Dabei ist es bisher notwendig, den Betrieb der Vorrichtung zu stoppen, den eng vor der Ringdüse stehenden Kalibrierdorn in axialer Richtung zu verschieben, um an die Verstellvorrichtung des Verdrängungsdornes der Ringdüse heranzukommen. To adjust the thickness of a foam sheet extruded as a tube to accomplish, it is known to move the annular gap of the annular nozzle by axial displacement of the central displacement mandrel can be adjusted continuously. So far it has been necessary to stop the operation of the device, the calibration mandrel standing close to the ring nozzle to move in the axial direction to the adjusting device of the displacement mandrel the ring nozzle. Nach dem Einstellen des Ringspaltes durch die Axialverstellung des den Ringspalt mit dem Gehäuse bildenden zentralen Verdrängungsdornes, mußte der Kalibrierdorn wieder herangefahren und der Produktionsprozeß aufgenommen werden. Erst dann konnte festgestellt werden, ob die neue Einstellung der Ringspaltgröße zu der gewollten Foliendicke führte.After setting the annular gap by axially adjusting the the annular gap with the housing forming the central displacement mandrel, had to The calibration mandrel is brought up again and the production process can be started. Only then could it be determined whether the new setting of the annular gap size led to the desired film thickness. War dies nicht der Fall, so war ein weiterer, aufwendiger Einstellvorgang von Nöten.If this was not the case, there was a further, complex adjustment process of necessity. Der Erfindung liegt die Aufgabe zugrunde, bei einer Vorrichtung der eingangs geschilderten Art eine einfachere Einstellmöglichkeit des Ringspaltes durch axiales Verschieben des Verdrängungsdorns der Ringdüse zu ermöglichen, die eine geringere Störung des Produktionsprozesses verursacht. The invention is based on the object in a device of A simpler adjustment of the annular gap through the type described at the beginning to allow axial displacement of the displacement mandrel of the ring nozzle, the one causes less disruption to the production process. Die Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 genannten Merkmale gelöst. The object is achieved according to the invention by the features in the characterizing part of the claim 1 mentioned features solved. Am Ende des Kalibrierdornes wird üblicherweise der Schaumstoffschlauch aufgeschnitten, damit er zu einer Folienbahn flachgelegt werden kann. Das hinter dem Kalibrierdorn liegende Hülsenende ist während des laufenden Produktionsprozesses erreichbar. Die Verstellung der Ringspaltgröße kann somit während des laufenden Produktionsprozesses durch Angreifen an dem Hülsenende und Drehen dieser vorgenommen werden. Es kann daher ein schnelles Reagieren auf Dickenabweichungen der Folienbahn erreicht werden. The foam tube is usually at the end of the calibration mandrel cut open to make him one Foil web can be laid flat. The behind The end of the case lying next to the calibration mandrel is during the ongoing production process accessible. The adjustment of the annular gap size can thus be carried out during the running Production process made by gripping the end of the tube and turning it will. It is therefore possible to react quickly to deviations in the thickness of the film web can be achieved. Die Verstellung des Ringspaltes der Ringdüse ist in kürzester Zeit ausführbar und stört den laufenden Produktionsprozeß nicht mehr.The adjustment of the ring gap of the ring nozzle is very quick executable and no longer disrupts the ongoing production process. Eine vorteilhafte Ausgestaltung der Erfindung wird durch die im Kennzeichen des Anspruchs 2 genannten Merkmale aufgezeigt. Die hinter dem Kalibrierdorn liegende Verstellmutter ist nunmehr während des laufenden Produktionsprozesses erreichbar. Ein einfaches Angreifen an den Schlüsselflächen der Verstellmutter ermöglicht ein Drehen der mit dem Verdrängungsdorn verbundenen Hülse. An advantageous embodiment of the invention is provided in the identifier of claim 2 mentioned features shown. The one behind the calibration mandrel Adjustment nut can now be reached during the ongoing production process. A simple grip on the wrench flats of the adjusting nut enables a Turning the sleeve connected to the displacement mandrel. Anhand der Zeichnung wird nachstehend ein Ausführungsbeispiel der Erfindung näher erläutert. Es zeigt F i g. 1 eine Vorrichtung zur Herstellung von Schaumstoffolien, Fig. 2 im vergrößerten Maßstab einen Ausschnitt der F i g. 1 unter Darstellung der Ringdüse und der durch den Kalibrierdorn hindurchragenden Verstellvorrichtung für die Ringdüse. Based on the drawing, an embodiment of the Invention explained in more detail. It shows F i g. 1 an apparatus for the production of Foam foils, FIG. 2, on an enlarged scale, a section of FIG. 1 under Representation of the ring nozzle and the adjustment device protruding through the calibration mandrel for the ring nozzle. Einer Schneckenstrangpresse 3 wird über einen Trichter 4 Polystyrolgranulat eingegeben, das aufgeschmolzen und mit durch ein Einspritzventil 5 beigegebenem Treibmittel vermischt wird. Die Schnekkenstrangpresse 3 weist einen Düsenkopf 10 auf, in dem eine Ringdüse 6 ausgebildet ist. Der in Schlauchform durch die Ringdüse 6 extrudierte Polystyrolschaumstoff wird zu einem Schlauch 7 größeren Durchmessers aufgeblasen und über einen gekühlten Kalibrierdorn 8 gezogen. Der Schaumstoffschlauch 7 wird am Ende des Kalibrierdornes 8 durch ein Messer 9 aufgeschlitzt und über eine geeignete, hier von Rollen 11 bis 13 angedeutete Flachlegevorrichtung bahnförmig ausgebreitet. A screw extruder 3 is 4 polystyrene granulate through a funnel entered, melted and added by an injection valve 5 Propellant is mixed. The screw extruder 3 has a nozzle head 10 on, in which an annular nozzle 6 is formed. The one in the form of a hose through the ring nozzle 6 extruded polystyrene foam becomes a tube 7 of larger diameter inflated and pulled over a cooled calibration mandrel 8. The foam tube 7 is slit open at the end of the calibration mandrel 8 by a knife 9 and a suitable flattening device, indicated here by rollers 11 to 13, in the form of a sheet spread out. Aus dem Längsschnitt der Fig. 2 ist die Ringdüse 6 im Düsenkopf 10 sichtbar. Die Ringdüse 6 weist einen zentrischen Verdrängungsdorn 14 auf, der eine axiale Mittelbohrung 15 hat und damit auf einem zentralen Führungsdorn 16 gleitet. Der Verdrängungsdorn 14 ist gegenüber dem Führungsdorn 16 mittels einer Paßfeder 18 verdrehsicher angeordnet. Der Führungsdorn 16 ist mit#em Gehäuse des Düsenkopfes 10 fest verbunden. From the longitudinal section in FIG. 2, the ring nozzle 6 is in the nozzle head 10 visible. The ring nozzle 6 has a central displacement mandrel 14, which is a has an axial central bore 15 and thus slides on a central guide pin 16. The displacement mandrel 14 is opposite the guide mandrel 16 by means of a feather key 18 arranged to prevent rotation. The guide mandrel 16 is with the housing of the nozzle head 10 firmly connected. An der Stirnseite des Verdrängungsdornes 14 ist eine Hülse 18 über einen Haltekranz 19 formschlüssig angebracht, der über einen Endflansch 20 der Hülse 18 greift. Die Hülse 18 stützt sich gegenüber der Stirnseite des Verdrängungsdornes 14 über ein axiales Drucklager 21 ab. Am anderen Ende der Hülse 18 ist diese mit einem Endflansch 22 über einen Haltekranz 23 formschlüssig mit einer Verstellmutter 24 verbunden. Die Hülse 18 stützt sich mit diesem Ende über ein Drucklager 25 an der Verstellmutter 24 ab. Durch die Verstellmutter 24 greift eine koaxiale Gewindestange 26. Diese Gewindestange 26 ist starr mit dem zentralen Führungsdorn 16 verbunden. On the end face of the displacement mandrel 14, a sleeve 18 is over a retaining ring 19 attached in a form-fitting manner, which over an end flange 20 of the sleeve 18 takes effect. The sleeve 18 is supported against the end face of the displacement mandrel 14 via an axial thrust bearing 21. At the other end of the sleeve 18 this is with an end flange 22 via a retaining collar 23 in a form-fitting manner with an adjusting nut 24 connected. The sleeve 18 is supported with this end via a thrust bearing 25 the adjusting nut 24 from. A coaxial threaded rod engages through the adjusting nut 24 26. This threaded rod 26 is rigidly connected to the central guide mandrel 16.
DE3126125A 1981-07-02 1981-07-02 Foamed polystyrene sheeting prodn. - where extruder ring nozzle is adjusted by moving tapered corepiece longitudinally with accessible outer nut Expired DE3126125C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3126125A DE3126125C1 (en) 1981-07-02 1981-07-02 Foamed polystyrene sheeting prodn. - where extruder ring nozzle is adjusted by moving tapered corepiece longitudinally with accessible outer nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3126125A DE3126125C1 (en) 1981-07-02 1981-07-02 Foamed polystyrene sheeting prodn. - where extruder ring nozzle is adjusted by moving tapered corepiece longitudinally with accessible outer nut

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DE3126125C1 true DE3126125C1 (en) 1982-12-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405060A2 (en) * 1989-06-30 1991-01-02 HERMANN BERSTORFF Maschinenbau GmbH Method of manufacturing thermoplastic foam
EP0444224A1 (en) * 1990-02-27 1991-09-04 Nederlandse Pillo-Pak Maatschappij B.V. Extrusion head regulator
EP0719627A3 (en) * 1994-12-27 1996-12-27 Hennecke Gmbh Maschf Process and device for producing foam using carbon dioxide dissolved under pressure
EP0925900A1 (en) * 1997-12-26 1999-06-30 Sumitomo Chemical Company, Limited Device for manufacturing foamed thermoplastic resin sheet
DE102011110613A1 (en) * 2011-08-16 2013-02-21 Frank van Lück Extruded foamed web manufacturing method for foamed product used as e.g. rock wool on roof region for thermal insulation, involves cooling interior of body by internal cooling flow so that specific thickness tolerance of web is obtained

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS-ERMITTELT *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405060A2 (en) * 1989-06-30 1991-01-02 HERMANN BERSTORFF Maschinenbau GmbH Method of manufacturing thermoplastic foam
EP0405060A3 (en) * 1989-06-30 1992-09-16 Hermann Berstorff Maschinenbau Gmbh Method of manufacturing thermoplastic foam
EP0444224A1 (en) * 1990-02-27 1991-09-04 Nederlandse Pillo-Pak Maatschappij B.V. Extrusion head regulator
EP0719627A3 (en) * 1994-12-27 1996-12-27 Hennecke Gmbh Maschf Process and device for producing foam using carbon dioxide dissolved under pressure
EP0925900A1 (en) * 1997-12-26 1999-06-30 Sumitomo Chemical Company, Limited Device for manufacturing foamed thermoplastic resin sheet
DE102011110613A1 (en) * 2011-08-16 2013-02-21 Frank van Lück Extruded foamed web manufacturing method for foamed product used as e.g. rock wool on roof region for thermal insulation, involves cooling interior of body by internal cooling flow so that specific thickness tolerance of web is obtained
DE102011110613B4 (en) * 2011-08-16 2017-06-14 Frank van Lück Process for the production of an extruded foam sheet and foam produced by this process

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