DE2120884A1 - Air cooling device - for blow moulded plastic tubular film with directional interval and external flows - Google Patents

Air cooling device - for blow moulded plastic tubular film with directional interval and external flows

Info

Publication number
DE2120884A1
DE2120884A1 DE19712120884 DE2120884A DE2120884A1 DE 2120884 A1 DE2120884 A1 DE 2120884A1 DE 19712120884 DE19712120884 DE 19712120884 DE 2120884 A DE2120884 A DE 2120884A DE 2120884 A1 DE2120884 A1 DE 2120884A1
Authority
DE
Germany
Prior art keywords
air
film
outside
cooling
internal
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
DE19712120884
Other languages
German (de)
Inventor
Hartmut Dipl.-Ing. 4542 Tecklenburg Upmeier
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 DE19712120884 priority Critical patent/DE2120884A1/en
Publication of DE2120884A1 publication Critical patent/DE2120884A1/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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The blow mould has an outer cooling ring whose outlet slit is directed on the outside of the film and with internal air channels within the blow head to circulate inner cooling air according to parent patent, whereby the nozzle rings on the ends of the extrusion orifice limiting the air outlet slits have raised lips in the flow direction which direct the cool air at a sharp angle onto the inside and outide of the film.

Description

Kühlvorri chtung für Kunststoff-Schlauchfolien Zusatz zu Patent ... (Pat-Anm. P 20 08 597.6) Das Hauptpatent, welches seinerseits ein Zusatzpatent zum Patent ... (Pat.-Anin. P 19 60 962.2-16) ist, betrifft eine Kühlvorrichtung für mittels eines Folienblaskopfes hergestellte Kunststoff-Schlauchfolie mit einem zwischen dem Blaskopf und der Folienerstarrungslinie angeordneten Außenluftkühlring, dessen Luftaustrittsschlitz auf die Folienaußenseite gerichtet ist, sowie den Blaskopf axial durchsetzendonLuftführungskanAlen zur Zul und Abführung der Innenkühiluft, 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, wobei der Innenluft-ZufUhrungskanal durch einen Ringraum gebildet ist und zur Innenluftabführung ein vorzugsweise konzentrisch im Ringraum angeordnetes Rohr vorgesehen ist. Cooling device for plastic tubular films Addition to patent ... (Pat-Note P 20 08 597.6) The main patent, which in turn is an additional patent to the Patent ... (Pat.-Anin. P 19 60 962.2-16) relates to a cooling device for Plastic tubular film produced by means of a film blow head with an between the blow head and the film solidification line arranged outside air cooling ring, whose The air outlet slot is directed towards the outside of the film, as well as the blow head axially penetrating air ducts for supply and discharge of the internal cooling air, an annular nozzle being provided at the outlet end of the internal air supply duct, whose air outlet slot is directed towards the inside of the film and so arranged is that the inside air flow is about the same as the outside air flow on the Foil impinges, the inner air supply duct being formed by an annular space is and a preferably concentrically arranged in the annular space for internal air discharge Tube is provided.

Indem ein Innenluftstrom etwa in gleicher Höhe wie der Außenluftstrom auf die Folie gerichtet wird, wird erreicht, daß der Schlauch nicht nur auf der Außen-, sondern auch auf der Innenseite eine gewünschte Oberflächenrauhigkeit aufweist, die weitgehend das Blocken, d. h. das-gegenseitige Anhaften, der Innenseiten des flachgelegten Folienschlauches ausschließt. Indem der Innenluft-Zuführungskanal durch einen Ringraum gebildet ist, in dem konzentrisch das Innenluft-Abführungsrohr angeordnet ist, bildet der Düsen-Innenring gleichzeitig den unteren Innen-Kühiring und wird besonders intensiv gekühlt.By having an inside air flow roughly at the same level as the outside air flow Is directed to the film, it is achieved that the tube is not only on the A desired surface roughness on the outside, but also on the inside having, the largely blocking, d. H. the-mutual clinging, the insides of the Flat film tube excludes. By using the indoor air supply duct is formed by an annular space in which the inside air discharge pipe concentrically is arranged, the nozzle inner ring also forms the lower inner cooling ring and is cooled particularly intensively.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, die Kühlvorrichtung nach dem Hauptpatent noch weiter zu verbessern, insbesondere die erreichbare Fo lienkühileis tung und damit die mögliche Folien-Ausstoßleistung zu steigern.The present invention is based on the object of the cooling device to improve even further according to the main patent, in particular the achievable Fo Line cooling performance and thus the possible film output capacity to be increased.

Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, die Düsenringe am Ende des Düsenspaltes mit in Blasrichtung hochgezogenen Lippen auszurüsten, die die Kühlluft schräg auf die Folieninnen- und Außenseite leiten. Die Kühlluftströme aus der Innen- und Außenseite werden also gewissermaßen aufgerichtet, so daß sie unter einem spitzen Winkel auf die Schlauchfolie auftreffen und an dieser entlangfließen. Durch Anwendung der bei Außen-Kühlringen schon bekannten Maßnahme der verlängerten Austrittslippe bei der Innenkühlvorrishtung nach dem Hauptpatent wird unter Beibehaltung der im Hauptpatent beschriebenen Wirkungsweise noch eine wesentliche Ausstoßleistungssteigerung erreicht, ohne daß die mit der Kühlvorrichtung nach dem Hauptpatent erreichbare Folien-Rauhigkeit vermindert wird, wie es sonst bei Leistungssteigerungen bei bekannten Anlagen ohne Innenkühlvorrichtung infolge des Glätteffektes einer auf den Kopf übergreifenden inneren ffberhitzung beobachtet wird.To solve this problem it is proposed according to the invention that To equip nozzle rings at the end of the nozzle gap with lips raised in the direction of blowing, which direct the cooling air at an angle to the inside and outside of the film. The cooling air flows from the inside and outside are so to speak straightened up so that they hit the tubular film at an acute angle and flow along it. By applying the measure of the extended one, which is already known for external cooling rings The outlet lip in the case of the internal cooling device according to the main patent is retained the mode of action described in the main patent still a significant increase in output achieved without the achievable with the cooling device according to the main patent Foil roughness is reduced, as it is otherwise known with increases in performance Systems without an internal cooling device as a result of the smoothing effect of an over-head internal overheating is observed.

Die Erfindung ist in der nachstehenden Beschreibung anhand der Zeichnung näher erläutert, in der ein Ausführungsbeispiel dargestellt ist. In der Beschreibung werden die mit dem Ausführungsbeispiel des Hauptpatentes übereinstimmenden Bestandteile nicht nochmals erläutert.The invention is illustrated in the following description with reference to the drawing explained in more detail, in which an embodiment is shown. In the description will those with the Embodiment of the main patent matching Components not explained again.

Der äußere Düsenspaltring 8 und der innere Düsenspalt# ring 9 sind am Ende des Düsenspaltes 7 mit muldenartig hochgewölbten Düsenspaltlippen 81 bzw. 9' versehen, durch welche die Kühl luft auf der Folieninnen- und -außenseite derart aufgerichtet wird, daß die Luftströme im spitzen Winkel auf die Schlauchfolie auftreffen und an dieser tangierend entlangfließen.The outer nozzle gap ring 8 and the inner nozzle gap ring 9 are at the end of the nozzle gap 7 with trough-like high arched nozzle gap lips 81 or 9 'provided through which the cooling air on the inside and outside of the film in such a way is erected so that the air currents impinge on the tubular film at an acute angle and flow along this tangent.

Die obere luftführende Lippe des äußeren Kühlringes 10 sowie der Innenluft-Leitring werden der Form der Düsenspaltlippen 81 bzw. 9' derart angepaßt, daß die Kühlluftströme durch annähernd gleichbleibende Kanalquerschnitte an die zu kühlende Schlauchfolie heranqeführt werden.The upper air-guiding lip of the outer cooling ring 10 and the inner air guide ring are adapted to the shape of the nozzle gap lips 81 and 9 'in such a way that the cooling air flows by means of almost constant channel cross-sections on the tubular film to be cooled be introduced.

Claims (1)

P atefl# tanspruch P atefl # t claim Kühlvorrichtung für mittels eines Folienblaskopfes hergestellte Kunststoff Schlauchfolie 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 Innen luftstrom etwa in gleicher Höhe wie der Außenluftstrom auf die Folie auftrifft, wobeider Innenluft-Zuführungskanal durch einen Ringraum gebildet und zur Innenluftabführung ein vorzugsweise konzentrisch im Ringraum angeordnete. Rohr vorgesehen ist, dadurch gekennzeichnet, daß die die Luftaustrittsschlitze begrenzenden Dusenflnge (8, 9) am Ende des Düsenspaltes (7) in Blasrichtung hochgezogene Lippen (8', 9') aufweisen, die die Kühlluft schräg auf die Folieninnen- und -außenseite leiten.Cooling device for plastic produced by means of a film blow head Tubular film with a arranged between the blow head and the film solidification line Outside air cooling ring - whose air outlet slot is directed towards the outside of the film is, as well as the blow head axially penetrating air ducts for supply and discharge the internal cooling air, with an annular nozzle at the outlet end of the internal air supply channel is provided whose air outlet slot is directed to the inside of the film and is arranged so that the inside air flow approximately at the same level as the outside air flow impinges on the film, the internal air supply channel through an annular space and a preferably concentrically arranged in the annular space for internal air discharge. Tube is provided, characterized in that the delimiting the air outlet slots Nozzle length (8, 9) at the end of the nozzle gap (7), lips raised in the blowing direction (8 ', 9'), which the cooling air obliquely on the inside and outside of the film conduct.
DE19712120884 1971-04-28 1971-04-28 Air cooling device - for blow moulded plastic tubular film with directional interval and external flows Pending DE2120884A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712120884 DE2120884A1 (en) 1971-04-28 1971-04-28 Air cooling device - for blow moulded plastic tubular film with directional interval and external flows

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712120884 DE2120884A1 (en) 1971-04-28 1971-04-28 Air cooling device - for blow moulded plastic tubular film with directional interval and external flows

Publications (1)

Publication Number Publication Date
DE2120884A1 true DE2120884A1 (en) 1972-11-09

Family

ID=5806240

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712120884 Pending DE2120884A1 (en) 1971-04-28 1971-04-28 Air cooling device - for blow moulded plastic tubular film with directional interval and external flows

Country Status (1)

Country Link
DE (1) DE2120884A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9214650U1 (en) * 1992-10-28 1993-02-18 Windmöller & Hölscher, 4540 Lengerich Blown film extrusion head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9214650U1 (en) * 1992-10-28 1993-02-18 Windmöller & Hölscher, 4540 Lengerich Blown film extrusion head

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