DE2008597A1 - Cooling device for plastic tubular film from a blow head - Google Patents

Cooling device for plastic tubular film from a blow head

Info

Publication number
DE2008597A1
DE2008597A1 DE19702008597 DE2008597A DE2008597A1 DE 2008597 A1 DE2008597 A1 DE 2008597A1 DE 19702008597 DE19702008597 DE 19702008597 DE 2008597 A DE2008597 A DE 2008597A DE 2008597 A1 DE2008597 A1 DE 2008597A1
Authority
DE
Germany
Prior art keywords
film
air
cooling device
blow head
cooling
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
DE19702008597
Other languages
German (de)
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to DE19702008597 priority Critical patent/DE2008597A1/en
Priority to CH1664570A priority patent/CH515795A/en
Priority to FR7040597A priority patent/FR2072182A5/fr
Priority to GB5503670A priority patent/GB1326771A/en
Priority to US00095025A priority patent/US3709290A/en
Publication of DE2008597A1 publication Critical patent/DE2008597A1/en
Pending 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
    • 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
    • B29C48/911Cooling
    • B29C48/9115Cooling of hollow articles
    • B29C48/912Cooling of hollow articles of tubular films
    • B29C48/913Cooling of hollow articles of tubular films externally
    • 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
    • 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
    • B29C48/911Cooling
    • B29C48/9115Cooling of hollow articles
    • B29C48/912Cooling of hollow articles of tubular films
    • B29C48/9125Cooling of hollow articles of tubular films internally

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

An outside cooling ring is positioned between the head and the film setting line with the air outlet directed to the outside of the film and with inside air cooling channels forming a ring nozzle outlet directed on the inside of the film at the same height as the outside flow whereby the inner air supply channel is formed by an annulus with a concentric inner outlet tube.

Description

Kühlvorrichtung für Kunststoff-Schlauchfolien Zusatz zu Patent Pat#-Anm.P 19 60962.2 Das Hauptpatent betrifft eine Kühivorrichtung für mittels eines Folienblaskopfes hergestellte Kunststoff-Schlauchfolien mit eine wischen dem Blaskopf und der Folienerstarrungslinie angeordnete Außenluftkühlring, dessen Luftaustrittsschlitz auf die Folienaußenseite gerichtet ist, sowie den Blaskopf axial durchsetz#nden Luftführungskanälen zur Zu- und Abführung der Innenkühiluft. Cooling device for tubular plastic films Addition to patent Pat # -Anm.P 19 60962.2 The main patent relates to a cooling device for by means of a film blow head manufactured plastic tubular films with a wipe the die head and the film solidification line arranged outside air cooling ring, whose air outlet slot on the outside of the film directed, as well as the blow head axially penetrating air ducts for supply and removal of the internal cooling air.

Nach der Erfindung des Hauptpatentes ist am Austrittsende des Innenluft-Zuführungskanals eine Ringdüse vorgesehen, deren Luftast:rittsschlitz auf die Folieninnenseite gerichtet und so angeordnet ist, daß der Innenluftstrom etwa in gleicher Höhe wie der Außenluftstrom auf die Folie auftrifft. Durch diesen Vorschlag des Hauptpatentes wird erreicht, daß der Schlauch nicht nur auf der Außßen-,sondern auch auf der Innenseite eine gewUnschte Ober flächenrauhigkeit aufweist, die weitgehend das Blocken, d.h. das gegenseitige Anhaften, der Innenseiten des flach gelegten Folienschlauches ausschließt. Nach einem weiteren Vorschlag des Hauptpatentes kann die Luftaustrittsrichtung eines oder beider Austrittsschiitte leicht in Richtung zum Blaskopf-Dtisenspalt geneigt sein, wodurch eine besonders intensive Kühlung der Hundstückringe erreicht werden soll, die wiederum ihrerseits zur Erhöhung der Rauhigkeit der Folie beiträgt.According to the invention of the main patent, the inside air supply duct is at the outlet end An annular nozzle is provided, the air branch of which: Rittsschlitz directed towards the inside of the film and is arranged so that the inside air flow is approximately at the same level as the outside air flow hits the foil. This proposal of the main patent achieves that the hose is not only on the outside, but also on the inside Has the desired surface roughness, which largely results in blocking, i.e. the mutual adhesion, which excludes the inside of the flat film tube. According to another suggestion of the main patent can change the air outlet direction one or both exit slits slightly in the direction of the die head / nozzle gap be inclined, which achieves a particularly intensive cooling of the dog piece rings which in turn contributes to increasing the roughness of the film.

Erfindungsgcmäß wird nun die Kühlvorrichtung nach dem Hauptpatent dadruch weiter ausgestaltet, daß der Innenluft-Zuftlhrungskanal durch einen Ringraum gebildet ist, wobei zur Innenluftabfuhrung ein vorzugsweise konzentrisch zu dem Ringraum angeordnetes Rohr vorgesehen ist. Durch diese Ausbildung wird erreicht, daß der Dusen-Innenring gleichzeitig den unteren Innen-Kühiring bildet.The cooling device according to the main patent is now in accordance with the invention dadruch further designed that the inside air supply duct through an annular space is formed, with a preferably concentric to the inside air discharge Annular space arranged pipe is provided. Through this training it is achieved that the inner nozzle ring forms the lower inner cooling ring at the same time.

Auf kiese Weise wird der innere Düscnring besonders intensiv gekühlt. Die Kühlluft strömt anders als bei dem im Hauptpatent dargestellten Ausführungsbeispiel durch den äußeren Ringraum der B!askopfbohrung in das Innere der Folienblase und wird durch das mittig durch den Ringraum geführte Rohr nach außen abgeführt.The inner nozzle ring is cooled particularly intensively in this gritty way. The cooling air flows differently than in the embodiment shown in the main patent through the outer annular space of the drilling head into the interior of the foil bubble and is discharged to the outside through the pipe that is led through the center of the annulus.

In weiterer Ausgestaltung der Erfindung kann der Außendurchmesser des Innenluftleitringes im wesentlichen dem Ringspaltdurchmesser des Folienblaskopfes entsprechen. Die Folie wird dann durch die zwischen der Folieninnenseite und dem Innenluftleitring durchgedrucke Kühlluft abgestützt, ohne daß sie ankleben und abreissen kann. Damit kann eine beliebig große Innenrauhigkeit erreicht werden, die bei Zunahme des Durchmessers des Innenluftleitringes größer wird.In a further embodiment of the invention, the outer diameter of the inner air guide ring essentially corresponds to the annular gap diameter of the film die correspond. The foil is then through the between the inside of the foil and the Inner air guide ring supported by forced cooling air without sticking and tearing off can. With this, an arbitrarily large internal roughness can be achieved, which increases the diameter of the inner air guide ring becomes larger.

Ferner ist es erfinciungsgemäs zweckmäßig, wenn der Ringraum mit wärmeisolierenden Schichten belegt ist. Hierdurch wird vermieden, daß eine unerwUnschte Erwärmung der Kühlluft durch die heiße Wandung der Blaskopfbohrung erfolgt.Furthermore, it is expedient according to the invention if the annular space with heat-insulating Layers is occupied. This avoids undesirable heating the cooling air through the hot wall the blow head drilling takes place.

Die Erfindung ist in der nachstehenden Beschreibung anhand der Zeichnung näher erläutert, in der ein Ausführungsbeispiel dargestellt ist. Die mit dem Ausführungsbeispiel des Hauptpatentes übereinstimmenden Bestandteile sind hierbei nicht nochmals erlautet.The invention is illustrated in the following description with reference to the drawing explained in more detail, in which an embodiment is shown. The one with the embodiment Components that correspond to the main patent are not mentioned again.

Bei dem dargestellten Ausführungsbeispiel wird die bei 12 zugeführte Kühlluft, soweit sie nicht über die Verbindung 13 dem Außenkühlring 10,11 zugeleitet wird, über das Rohr 22 und den Ringkanal 19 dem Innen-Kühiring 17 zugeführt, dessen Austrittsspalt 18 radial nach außen blasend angeordnet ist. Der untere Ring der Innenluftdüse wird durch den inneren Mundstückring 9 des Blaskopfes gebildet, der somit unmittelbar von der Kühlluft bestrichen und gekühlt wird.In the illustrated embodiment, the supplied at 12 is Cooling air, unless it is fed to the external cooling ring 10, 11 via the connection 13 is fed via the tube 22 and the annular channel 19 to the inner cooling ring 17, whose Exit gap 18 is arranged blowing radially outward. The lower ring of the Inner air nozzle is formed by the inner mouthpiece ring 9 of the blow head, the is thus brushed and cooled directly by the cooling air.

In der Zeichnung ist, ebenso wie in der Darstellung des Hauptpatentes, die üblicherweise bei Folienblasköpfen ohne die erfindungsgemäße Ausführung der Innenktihlung zu beobachtende Einschnürung des Folienschlauches direkt über dem Mundstücksspalt bei 6' angedeutet. Diese Einschnüring wird nach der vorliegenden Erfindung durch die Abstützung durch die Innenkühlluft verhindert.In the drawing, as in the representation of the main patent, which is usually the case with film die heads without the embodiment of the invention Inner cooling to be observed constriction of the film tube directly above the Mouthpiece gap indicated at 6 '. This constriction is after the present Invention prevented by the support by the internal cooling air.

Anschließend strömt die Innenktililluft durch das Innenrohr 14, das mittels der strömungsgünstigen Halter 20 in dem ringförmigen Kanal 19 befestigt ist, ins Freie.Then the inner air flows through the inner tube 14, the fastened in the annular channel 19 by means of the streamlined holder 20 is, outdoors.

Durch leichtes Auswechseln des Kühlringes 10,11 sowie des Innenluftleitringes 17 kann die Kühlvorrichtuny auf verschiedene Düsendurchmesser eingerichtet werden, so daß die Luftverhältnisse am Düsenspalt gleichbleiben.By easily replacing the cooling ring 10, 11 and the inner air guide ring 17 the cooling device can be set up for different nozzle diameters, so that the air conditions at Nozzle gap remain the same.

Eine unerwünschte Erwärmung der Kühlluft innerhalb des Ring-kanalr 19 kann durch eine gestrichelt angedeutete Wärmeisolierung 21 vermieten werden. Diese Isolierung kann beispielsweise durch eine oder mehrere Lagen dünner Aluminium-Reflektorwellfolie gebildet werden.Unwanted heating of the cooling air inside the ring duct 19 can be rented out by a thermal insulation 21 indicated by dashed lines. This insulation can, for example, be provided by one or more layers of thin aluminum reflector corrugated foil are formed.

Claims (3)

PatentansprücheClaims 1. Kühlvorrichtung für mittels eines Folienblaskopfes hergestellte Kunststoff-Schlauchfolien mit einem zwischen dem Blaskopf und der Folienerstarrungslinie angeordneten Außenluftkühlring, dessen Luftaustrittsschlitz auf die Folienaußenseite gerichtet ist, sowie den Blaskopf axial durchsetzenden Luftführungskanälen zur Zu- und Abführung der Innenkühlluft, wobei am Austrittsende des Innenluft-Zuführungskanals eine Ringdüse vorgesehen ist, deren Luftaustrittsschlitz auf die Folieninnenseite gerichtet und so angeordnet ist, daß der Innenluftstrom etwa in gleicher Höhe wie der Außenluftstrom auf die Folie auftrifft, d a d u r c h g e k e n n z e i c h n et, daß der Innenluft-Zuführungskanal durch einen Ringraum (19) gebildet ist, wobei zur Innenluftabführung ein vorzugsweise konzentrisch im Ringraum (19) angeordnetes Rohr (14) vorgesehen ist.1. Cooling device for produced by means of a film blow head Plastic tubular film with one between the blow head and the film solidification line arranged outside air cooling ring, whose air outlet slot on the outside of the film is directed, and the blow head axially penetrating air ducts for supply and discharging the internal cooling air, wherein at the outlet end of the internal air supply duct an annular nozzle is provided, the air outlet slot of which on the inside of the film directed and arranged so that the internal air flow is approximately at the same level as the outside air flow hits the film, which means that there are no signs of it n et that the inside air supply channel is formed by an annular space (19), wherein a preferably concentrically arranged in the annular space (19) for internal air discharge Tube (14) is provided. o. Kühlvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Außendurchmesser des Innenluftleitringes (17) im wesentlichen dem Ringspaltdurchmesser (7) des Folienblaskopfes entspricht. o. Cooling device according to claim 1, characterized in that the The outer diameter of the inner air guide ring (17) essentially corresponds to the diameter of the annular gap (7) of the film die. 3. Kühlvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet daß der Ringraum (19) mit wärmeisolierenden Schichten (21) belegt ist. 3. Cooling device according to claim 1 or 2, characterized that the annular space (19) is covered with heat insulating layers (21). L e e r s e i t eL e r s e i t e
DE19702008597 1969-12-04 1970-02-24 Cooling device for plastic tubular film from a blow head Pending DE2008597A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19702008597 DE2008597A1 (en) 1970-02-24 1970-02-24 Cooling device for plastic tubular film from a blow head
CH1664570A CH515795A (en) 1969-12-04 1970-11-10 Cooling device for plastic tubular films
FR7040597A FR2072182A5 (en) 1969-12-04 1970-11-13
GB5503670A GB1326771A (en) 1969-12-04 1970-11-19 Cooling equipment for tubular plastic film
US00095025A US3709290A (en) 1969-12-04 1970-12-04 Cooling equipment for tubular plastics film made by a blowhead

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702008597 DE2008597A1 (en) 1970-02-24 1970-02-24 Cooling device for plastic tubular film from a blow head

Publications (1)

Publication Number Publication Date
DE2008597A1 true DE2008597A1 (en) 1971-09-16

Family

ID=5763246

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702008597 Pending DE2008597A1 (en) 1969-12-04 1970-02-24 Cooling device for plastic tubular film from a blow head

Country Status (1)

Country Link
DE (1) DE2008597A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT403584B (en) * 1993-09-13 1998-03-25 Chemiefaser Lenzing Ag METHOD AND DEVICE FOR PRODUCING CELLULOSIC FLAT OR TUBE FILMS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT403584B (en) * 1993-09-13 1998-03-25 Chemiefaser Lenzing Ag METHOD AND DEVICE FOR PRODUCING CELLULOSIC FLAT OR TUBE FILMS

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