DE3634535A1 - Device for fine correction of the transversal thickness profile of blown films - Google Patents

Device for fine correction of the transversal thickness profile of blown films

Info

Publication number
DE3634535A1
DE3634535A1 DE19863634535 DE3634535A DE3634535A1 DE 3634535 A1 DE3634535 A1 DE 3634535A1 DE 19863634535 DE19863634535 DE 19863634535 DE 3634535 A DE3634535 A DE 3634535A DE 3634535 A1 DE3634535 A1 DE 3634535A1
Authority
DE
Germany
Prior art keywords
ring
cooling
cooling ring
blown films
fine correction
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.)
Withdrawn
Application number
DE19863634535
Other languages
German (de)
Inventor
Erich Dipl Ing Beck
Martin Scholl
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.)
PLANEX GmbH
Original Assignee
PLANEX 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
Priority claimed from DE3627129A external-priority patent/DE3627129C1/en
Application filed by PLANEX GmbH filed Critical PLANEX GmbH
Priority to DE19863634535 priority Critical patent/DE3634535A1/en
Publication of DE3634535A1 publication Critical patent/DE3634535A1/en
Withdrawn legal-status Critical Current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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal 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
    • B29C48/901—Thermal 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
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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
    • B29C48/90—Thermal 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
    • B29C48/901—Thermal 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
    • B29C48/903—Thermal 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 externally

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

For fine correction of the transversal thickness distribution of blown films it is proposed to arranged on the air cooling ring, serving for cooling the film bubble, a multiplicity of baffles, by means of which the cooling of the film bubble, and consequently its transversal thickness, can be locally influenced. The baffles are arranged in a distributed manner on the circumference in the vicinity of or at the outlet of the cooling air from a diaphragm arranged after the cooling ring. <IMAGE>

Description

Die Zusatzerfindung betrifft, wie in der Hauptanmeldung be­ schrieben, eine Vorrichtung zur Feinkorrektur der transver­ salen Dickenverteilung bei Blasfolien.The additional invention relates, as in the main application wrote a device for fine correction of the transver salen thickness distribution for blown films.

Sie bezieht sich auf eine Vielzahl von Störkörpern im Bereich der einer ringförmigen Blasluftdüse nachgeschalteten ring­ förmigen Blende oder Irisblende.It relates to a large number of interfering objects in the area the ring downstream of an annular blast air nozzle shaped aperture or iris.

Es ist bekannt, daß die Ausstoßleistung von Folienblasanlagen durch Einsatz von ringförmigen Blenden oder Irisblenden nach dem Kühlring gesteigert werden kann. Diese Erscheinung beruht auf einer im Blendenbereich durch erhöhte Luftgeschwindigkeit auftretenden Druckabsenkung und damit einer Aufweitung der Folienblase, die dadurch dem Kühlluftstrom eine größere Fläche bietet.It is known that the output of film blowing systems by using ring-shaped diaphragms or iris diaphragms the cooling ring can be increased. This phenomenon is based on one in the aperture area due to increased air speed occurring pressure drop and thus an expansion of the Foil bubble, which gives the cooling air flow a larger area offers.

Versuche haben gezeigt, daß die Anbringung einer Vielzahl von Störkörpern direkt an der Blende oder in der Nähe des Ring­ spaltes zwischen Blende und Folienblase ebenso geeignet ist, die transversale Dickenverteilung zu beeinflussen, wie bei einer Vorrichtung gemäß der Hauptpatentanmeldung.Experiments have shown that the attachment of a large number of Interfering bodies directly on the screen or near the ring gap between the diaphragm and the film bubble is also suitable, to influence the transverse thickness distribution, as in a device according to the main patent application.

Da die Zugänglichkeit zu einer Vielzahl von Stellgliedern im Bereich der dem Kühlring nachgeschalteten Blende bedeutend bes­ ser ist, hat der erfindungsgemäße Vorschlag, den Vorteil der besseren Bedienbarkeit.Since access to a large number of actuators in the The area of the aperture downstream of the cooling ring is significantly bes ser, the proposal according to the invention has the advantage of better usability.

Als weitere Ausführungsform zur Beeinflussung der azimutalen Luftgeschwindigkeitsverteilung im Blendenbereich kann der Blendenring aus flexiblem Material ausgeführt werden. Die Luftgeschwindigkeits- und damit Dickenverteilung kann dann durch eine Vielzahl von am Umfang verteilten Druck- und Zug­ elementen je nach vorliegendem Dickenprofil korrigiert werden.As a further embodiment for influencing the azimuthal Air velocity distribution in the aperture area can Aperture ring made of flexible material. The Air speed and thus thickness distribution can then through a variety of pressure and tension distributed around the circumference elements are corrected depending on the thickness profile.

Als weitere Variante einer partialen Veränderung des Ring­ spaltes zwischen Folienblase und Blende kann eine Irisblende verwendet werden, deren Lamellen gemeinsam auf eine Grundpo­ sition je nach Blasenform einzustellen sind.As a further variant of a partial change in the ring An iris diaphragm can form a gap between the film bubble and the diaphragm be used, the slats together on a Grundpo position depending on the shape of the bubble.

Nach Festlegung der Arbeitsposition kann die gemeinsame Ver­ stellvorrichtung für die Lamellen entriegelt werden, wonach die Einzellamellen je nach vorliegendem Dickenprofil verschoben werden können.After determining the working position, the common Ver Adjustment device for the slats are unlocked, after which the Individual slats shifted depending on the existing thickness profile can be.

Die erfindungsgemäßen Vorrichtungen mit einigen Varianten werden nachfolgend anhand der Bilder Fig. 1-4 beschrieben:The devices according to the invention with some variants are described below with the aid of the figures Fig. 1-4:

Fig. 1 zeigt einen Kühlring 1 und eine Folienblase 3 mit den durch a, b, c angedeuteten Luftströmungslinien. Ein auf­ gesetzter Blendenring 7 trägt eine Irisblende 4, die mit dem Hebel 9 verstellt werden kann. Ein Aufsatzring 5, der durch die Speichen 6 gehalten wird, hält die Schieber, die in Richtung d,e verschoben und mit einer geeigneten Klemm­ vorrichtung festgestellt werden können, in Position. Durch Verschieben in Pfeilrichtung d, e wird die Luftströmung a, b, c mehr oder weniger gebremst. Fig. 1 shows a cooling ring 1 and a bubble 3 through the a, b, c indicated air flow lines. A diaphragm ring 7 is placed on an iris diaphragm 4 , which can be adjusted with the lever 9 . An attachment ring 5 , which is held by the spokes 6 , holds the slide, which can be moved in the direction d , e and can be fixed with a suitable clamping device, in position. By moving in the direction of the arrow d , e , the air flow a , b , c is more or less slowed down.

Fig. 2 zeigt die Aufsicht von Fig. 1. FIG. 2 shows the top view of FIG. 1.

Fig. 3 zeigt einen flexiblen Blendenring 5, der anstelle eines festen Blendenringes 5 (Fig. 1) durch Zug- und Druck­ elemente, wie z.B. Schrauben oder Vakuum-Druckkammern nach innen,wie A oder nach außen, wie B verbogen werden kann. Fig. 3 shows a flexible aperture ring 5 , the elements instead of a fixed aperture ring 5 ( Fig. 1) by tension and pressure, such as screws or vacuum pressure chambers to the inside, such as A or outwards, such as B.

Fig. 4 zeigt einen Blendenring 3 mit den Irislamellen 1 und dem Verstellhebel 2. Fig. 4 shows a diaphragm ring 3 with the iris slats 1 and the adjusting lever. 2

Die Irisblende wird in Arbeitsposition mit dem Durchmesser A eingestellt. Nach Entriegelung der Lamellen-Paketverstellung können die Lamellen 1 einzeln verstellt und mit geeigneten Klemmvorrichtungen in ihrer Lage fixiert werden.The iris diaphragm is set in the working position with the diameter A. After unlocking the slat package adjustment, the slats 1 can be adjusted individually and their position can be fixed with suitable clamping devices.

Claims (3)

1. Luftkühlring zur Abkühlung einer Folienblase gemäß den Ansprüchen 1-3 des Hauptpatentes gekennzeichnet durch die Anordnung einer Vielzahl von Störkörpern, verteilt am Umfang in der Nähe oder am Austritt aus einer dem Kühlring nachgeschalteten Blende.1. Air cooling ring for cooling a film bubble according to the Claims 1-3 of the main patent characterized by the arrangement of a large number of interfering bodies close to the perimeter or at the exit from a Downstream cooling ring. 2. Luftkühlring nach Anspruch 1 gekennzeichnet durch einen flexiblen Blendenring, der durch geeignete Zug- und Druckelemente, z.B. Schrauben oder Vakuum-Druck­ kammern in Richtung A oder B, Fig. 4, verbogen werden kann.2. Air cooling ring according to claim 1, characterized by a flexible aperture ring which can be bent by suitable tension and pressure elements, for example screws or vacuum pressure chambers in the direction A or B , Fig. 4. 3. Luftkühlring nach Anspruch 1 gekennzeichnet durch einen Blendenring 3 (s. Fig. 4) mit Lamellen 1 und einem Hebel 2 zur konzentrischen Verstellung des Lamellenpaketes mit einer Vorrichtung zur Entriegelung der Paketverstellung und Stellmechanismen zur Einzelverstellung der Lamellen 1.3. Air cooling ring according to claim 1, characterized by an aperture ring 3 (see FIG. 4) with fins 1 and a lever 2 for concentric adjustment of the plate pack with a device for unlocking the packet adjustment and adjusting mechanisms for individual adjustment of the plates 1 .
DE19863634535 1986-08-09 1986-10-08 Device for fine correction of the transversal thickness profile of blown films Withdrawn DE3634535A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863634535 DE3634535A1 (en) 1986-08-09 1986-10-08 Device for fine correction of the transversal thickness profile of blown films

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3627129A DE3627129C1 (en) 1986-08-09 1986-08-09 Device for fine correction of the thickness profile in blown film production
DE19863634535 DE3634535A1 (en) 1986-08-09 1986-10-08 Device for fine correction of the transversal thickness profile of blown films

Publications (1)

Publication Number Publication Date
DE3634535A1 true DE3634535A1 (en) 1988-04-14

Family

ID=25846445

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863634535 Withdrawn DE3634535A1 (en) 1986-08-09 1986-10-08 Device for fine correction of the transversal thickness profile of blown films

Country Status (1)

Country Link
DE (1) DE3634535A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015707A1 (en) * 1989-06-21 1990-12-27 Stefan Konermann Process and device for producing bubble-film
DE3920194A1 (en) * 1989-06-21 1991-01-10 Konermann Stefan Local correction of blown film thickness using variable air flow
DE4001287A1 (en) * 1990-01-18 1991-07-25 Stefan Konermann Local correction of blown film thickness using variable air flow
EP0914928A1 (en) * 1997-11-10 1999-05-12 Macro Engineering &amp; Technology Inc. Air ring for cooling blown plastic film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015707A1 (en) * 1989-06-21 1990-12-27 Stefan Konermann Process and device for producing bubble-film
DE3920194A1 (en) * 1989-06-21 1991-01-10 Konermann Stefan Local correction of blown film thickness using variable air flow
US5281375A (en) * 1989-06-21 1994-01-25 Stefan Konermann Process and device for producing bubble-film
DE4001287A1 (en) * 1990-01-18 1991-07-25 Stefan Konermann Local correction of blown film thickness using variable air flow
EP0914928A1 (en) * 1997-11-10 1999-05-12 Macro Engineering &amp; Technology Inc. Air ring for cooling blown plastic film

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