DE1245582B - Extruder for the production of profiles from thermoplastic materials with hollow channels - Google Patents

Extruder for the production of profiles from thermoplastic materials with hollow channels

Info

Publication number
DE1245582B
DE1245582B DEB81450A DEB0081450A DE1245582B DE 1245582 B DE1245582 B DE 1245582B DE B81450 A DEB81450 A DE B81450A DE B0081450 A DEB0081450 A DE B0081450A DE 1245582 B DE1245582 B DE 1245582B
Authority
DE
Germany
Prior art keywords
mandrel
extruder
nozzle
profiles
production
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.)
Pending
Application number
DEB81450A
Other languages
German (de)
Inventor
Benedikt Georgii
Ludwig Meier
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB81450A priority Critical patent/DE1245582B/en
Publication of DE1245582B publication Critical patent/DE1245582B/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B29C48/301—Extrusion nozzles or dies having reciprocating, oscillating or rotating parts
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb

Description

Extruder zum Herstellen von Profilen aus. thermoplastischen Stoffen mit Hohlkanälen Die Erfindung betrifft Extruder zum Herstellen von Profilen aus thermoplastischen geschäumten Kunststoffen, die mit Hohlkanälen versehen sind.Extruder for the production of profiles. thermoplastic materials with hollow channels The invention relates to extruders for producing profiles from thermoplastic foamed plastics, which are provided with hollow channels.

Zur Erhöhung der Dehnbarkeit und zur Verringerung des Gewichtes werden Profile oder Schläuche aus geschäumtem Kunststoff verwendet. Die Herstellung der Profile ist schwierig; meist werden Stabilisatoren und Treibmittel zur Herstellüng einer Schaumstruktur mit geschlossenen Zellen benötigt. To increase the elasticity and to reduce the weight Profiles or hoses made of foamed plastic are used. The manufacture of the Profiling is difficult; mostly stabilizers and blowing agents are used in the production a foam structure with closed cells is required.

Die Oberfiäche dieser Profile ist uneben und porig.The surface of these profiles is uneven and porous.

Bekannt ist die Herstellung eines Profils mit mehreren Kanälen bzw. Innenwänden in einem Extruder mit Spritzdorn, dessen Ende durch Einfräsen in mehrere sektorartige Teile aufgespalten ist. Die Form dieser Teile entspricht der Form der Kanäle des Profils. It is known to produce a profile with several channels or Inner walls in an extruder with a spray mandrel, the end of which is milled into several sector-like parts is split. The shape of these parts corresponds to the shape of the Channels of the profile.

Da diese Kanäle aber drucklos sindj nachdem das Profil aus der Düse ausgetreten ist, kann das Profil nach innen zufallen und leichter schrumpfen, als wenn ein innerer Überdruck in den Kanälen den Schrumpfkräften entgegenwirken würde.Since these channels are pressureless, however, the profile emerges from the nozzle has leaked, the profile can fall inward and shrink more easily than if an internal overpressure in the ducts would counteract the shrinkage forces.

Aufgabe der Erfindung war es, diese Schwierigkeiten bei der Herstellung von leichten Profilen zu beseitigen und einen Extruder zum Herstellen von Profilen aus thermoplastischen Stoffen mit Hohlkanälen zu entwickeln, bei dem in der Austrittsöffnung der Düse ein feststehender und koaxial zur Düsenwand liegender Dorn angeordnet ist, an dem mehrere symmetrisch zur Dornachse und im Abstand voneinander liegende, parallel zur Dornachse verlaufende und am freien Ende des Dornes aus der Düse herausgeführte Dornfortsätze angebracht sind. Dieser Extruder ist erfindungsgemäß dadurch gekennzeichnet, daß die Dornfortsätze als Röhrchen ausgebildet und gemeinsam mit einem axial im Dorn verlautenden Rohr verbunden sind. The object of the invention was to overcome these manufacturing difficulties to eliminate light profiles and an extruder for the production of profiles to develop from thermoplastic materials with hollow channels, in which in the outlet opening the nozzle has a fixed mandrel located coaxially to the nozzle wall, on which several symmetrically to the mandrel axis and at a distance from each other, parallel extending to the mandrel axis and led out of the nozzle at the free end of the mandrel Spinous processes are attached. According to the invention, this extruder is characterized in that that the spinous processes are designed as tubes and together with an axially im Thorn denominated pipe are connected.

Die als Röhrchen ausgebildeten Dornfortsätze sind in weiterer Ausbildung der Erfindung wendelförmig geformt, und der Dorn, der sie trägt, ist drehbar gelagert. The spinous processes, which are designed as tubes, are in further training of the invention helically shaped, and the mandrel that carries it is rotatably mounted.

Um ein Zusammenfallen der Hohlräume hinter dem Ende der Verzweigungen zu vermeiden, ragen die Röhrchen über das Düsenende hinaus bis in die Kühlzone hinein. Zur Stützung der Kanäle ist das axial im Dorn verlaufende Rohr mit einer Druckgas liefernden Einrichtung verbunden. Dadurch ist es möglich, Druckluft von außen in die Hohlkanäle einzublasen und dadurch den Innenraum des Rohres unter Druck zu setzen. To a collapse of the voids behind the end of the branches To avoid this, the tubes protrude beyond the end of the nozzle and into the cooling zone. To support the channels, the tube running axially in the mandrel is supplied with a pressurized gas supplying facility connected. This makes it possible to bring in compressed air from the outside to blow in the hollow channels and thereby to put the interior of the pipe under pressure.

In der Zeichnung ist die erfindungsgemäße Vorrichtung beispielsweise dargestellt, und zwar zeigt F i g. 1 einen Längsschnitt durch das Ende des Extruders mit feststehendem Dorn, F i g. 2 einen senkrecht zur Achse verlaufenden Querschnitt A-A durch das Ende der Düse und Fig. 3 einen Querschnitt durch einen drehbaren Dorn. In the drawing, the device according to the invention is for example shown, namely shows F i g. 1 is a longitudinal section through the end of the extruder with fixed mandrel, F i g. 2 shows a cross-section perpendicular to the axis A-A through the end of the nozzle; and Fig. 3 is a cross-section through a rotatable mandrel.

Der Extruder besitzt eine an seinem Ende angebrachte Düse 1, die mit der Gehäusewand des Extruders durch einen flansch 2 verschraubt ist. In der hohlen Düse ist ein feststehender Dorn 3 so angeordnet, daß zwischen ihm und der Düse 1 ein Leerraum 4 gebildet wird, der im Betrieb mit dem heißen thermoplastischen Stoff gefüllt ist. In den Dorn 3 ist axial ein Rohr 5 eingesetzt, das in der Nähe des Endes 6 des Dorns in mehrere symmetrisch angeordnete Röhrchen 7 iibergeht. Die Röhrchen 7 verlaufen in dem Dorn schräg zur Achse und setzen sich in einer parallel zur Dorn achse verlaufenden Richtung nach außen hin fort. The extruder has a nozzle 1 attached to its end, which is screwed to the housing wall of the extruder through a flange 2. In the hollow nozzle, a fixed mandrel 3 is arranged so that between it and the Nozzle 1 an empty space 4 is formed, which in operation with the hot thermoplastic Fabric is filled. In the mandrel 3, a tube 5 is axially inserted, which is in the vicinity of the end 6 of the mandrel into a plurality of symmetrically arranged tubes 7. the Tubes 7 run in the mandrel obliquely to the axis and set in a parallel to the mandrel axis extending outward direction.

Im Betrieb wird der erhitzte plastische Stoff durch den vom Extruder erzeugten Innendruck durch die Öffnung 8 der Düse nach außen gepreßt. Durch die parallel zur Profilachse verlaufenden Röhrchen 7 werden in dem fertigen Profil Hohlkanäle gebildet. In operation, the heated plastic material is passed through by the extruder generated internal pressure pressed through the opening 8 of the nozzle to the outside. Through the Tubes 7 running parallel to the profile axis become hollow channels in the finished profile educated.

Da die Röhrchen 7 bis zu der Kühlzone reichen, in welcher der Stoff hinreichend erstarrt ist, besteht keine Gefahr, daß die gebildeten Kanäle im Profil hinter dem Ende der Röhrchen 7 wieder zusammenfallen. Since the tubes 7 extend to the cooling zone in which the substance is sufficiently solidified, there is no risk that the channels formed in the profile collapse again behind the end of the tube 7.

Gegebenenfalls kann dieses Zusammenfallen auch durch Preßluft verhindert werden, die durch das Rohr 5-und die Röhrchen 7 den Hohlkanälen im Profil zugeführt wird. If necessary, this collapse can also be prevented by compressed air are fed through the tube 5 and the tube 7 to the hollow channels in the profile will.

Spiralförmige Kanäle werden mit einem drehbaren Dorn 9 erzeugt, der einen oder mehrere Dornfortsätze 10 aufweist, die voll oder hohl sind und die wendelförmigen Kanäle formen (F i g. 3). Spiral channels are created with a rotatable mandrel 9, the has one or more spinous processes 10, which are full or hollow and which are helical Form channels (Fig. 3).

Der mit dem erfindungsgemäßen Extruder erzielte Fortschritt bei der Herstellung von Hohlprofilen ist vor allem darin zu sehen, daß es möglich wird, in die Kanäle des Profils Druckgas einzuführen. Dadurch bleibt der freie Innenraum in dem Profil so lange erhalten, bis das Profil ausreichend erkaltet ist und infolge seiner Steifheit eine große Formstabilität besitzt, so daß die Festigkeit der Wand eine plastische Verformung unmöglich macht. Auf diese Weise können auch dünnwandige Hohlprofile mit hoher Formstabilität hergestellt werden. The progress achieved with the extruder according to the invention in Production of hollow profiles is especially in seeing that it becomes possible to introduce compressed gas into the channels of the profile. This leaves the Maintain free interior space in the profile until the profile cools down sufficiently is and has a large dimensional stability due to its rigidity, so that the strength makes plastic deformation impossible for the wall. That way you can too thin-walled hollow profiles with high dimensional stability are produced.

Claims (3)

Patentansprüche: 1. Extruder zum Herstellen von Profilen aus thermoplastischen Stoffen mit Hohlkanälen, bei dem in der Austrittsöffnung der Düse ein feststehender und koaxial zur Düsenwand liegender Dorn angeordnet ist, an dem mehrere symmetrisch zur Dornachse und im Abstand voneinander liegende, parallel zur Domachse verlau- fende und am freien Ende des Dornes aus der Düse herausgeführte Dornfortsätze angebracht sind, dadurch geken-nzeichnet, daß die Dornfortsätze als Röhrchen (7) ausgebildet und gemeinsam mit einem axial im Dom (3) verlaufenden Rohr (5) verbunden sind. Claims: 1. Extruder for the production of profiles from thermoplastic Substances with hollow channels, in which there is a fixed channel in the outlet opening of the nozzle and is arranged coaxially to the nozzle wall lying mandrel, on which several symmetrically to the mandrel axis and at a distance from each other, parallel to the mandrel axis fende and attached to the free end of the mandrel extending out of the nozzle spinous processes are characterized in that the spinous processes are designed as tubes (7) and are jointly connected to a tube (5) extending axially in the dome (3). 2. Extruder nach Anspruch 1, dadurch gekennzeichnet, daß die als Röhrchen ausgebildeten Dornfortsätze (10) wendelförmig geformt sind und der Dorn (9), der sie trägt, drehbar gelagert ist. 2. Extruder according to claim 1, characterized in that the as Tubular formed spinous processes (10) are helically shaped and the spine (9), which carries it, is rotatably mounted. 3. Extruder nach Anspruch 1, dadurch gekennzeichnet, daß das axial im Dorn (3) verlaufende Rohr (5) mit einer Druckgas liefernden Einrichtung verbunden ist. 3. Extruder according to claim 1, characterized in that the axially in the mandrel (3) extending pipe (5) connected to a device delivering compressed gas is. In Betracht gezogene Druckschriften: Deutsche Auslegeschrift Nr. 1061484. Documents considered: German Auslegeschrift No. 1061484.
DEB81450A 1965-04-14 1965-04-14 Extruder for the production of profiles from thermoplastic materials with hollow channels Pending DE1245582B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB81450A DE1245582B (en) 1965-04-14 1965-04-14 Extruder for the production of profiles from thermoplastic materials with hollow channels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB81450A DE1245582B (en) 1965-04-14 1965-04-14 Extruder for the production of profiles from thermoplastic materials with hollow channels

Publications (1)

Publication Number Publication Date
DE1245582B true DE1245582B (en) 1967-07-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEB81450A Pending DE1245582B (en) 1965-04-14 1965-04-14 Extruder for the production of profiles from thermoplastic materials with hollow channels

Country Status (1)

Country Link
DE (1) DE1245582B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB274945I5 (en) * 1971-07-31 1975-01-28
DE2600859A1 (en) * 1975-01-13 1976-07-15 Wavin Bv METHOD AND DEVICE FOR MANUFACTURING A PLASTIC PIPE WITH LONGITUDINAL CHANNELS IN ITS PIPE WALL
EP0010490A1 (en) * 1978-10-16 1980-04-30 René Kuster Tubes, pipes and hollow structures of plastic material, method and tool for their manufacture
FR2439078A1 (en) * 1978-10-16 1980-05-16 Kuster Rene Extruding hollow tubular profiles - linked by integral oriented polypropylene bridges, for light, stiff screens which can fold or extend

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061484B (en) * 1955-01-11 1959-07-16 Willy Ruesch Injection device for the production of multiple cardiac catheters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061484B (en) * 1955-01-11 1959-07-16 Willy Ruesch Injection device for the production of multiple cardiac catheters

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB274945I5 (en) * 1971-07-31 1975-01-28
US3924992A (en) * 1971-07-31 1975-12-09 Wilhelm Hegler Apparatus for manufacture of partitioned plastic tubing
DE2600859A1 (en) * 1975-01-13 1976-07-15 Wavin Bv METHOD AND DEVICE FOR MANUFACTURING A PLASTIC PIPE WITH LONGITUDINAL CHANNELS IN ITS PIPE WALL
EP0010490A1 (en) * 1978-10-16 1980-04-30 René Kuster Tubes, pipes and hollow structures of plastic material, method and tool for their manufacture
FR2439078A1 (en) * 1978-10-16 1980-05-16 Kuster Rene Extruding hollow tubular profiles - linked by integral oriented polypropylene bridges, for light, stiff screens which can fold or extend

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