DE19541296C2 - Device for heating the film sectors of a film tube extruded from a film blowing head - Google Patents

Device for heating the film sectors of a film tube extruded from a film blowing head

Info

Publication number
DE19541296C2
DE19541296C2 DE19541296A DE19541296A DE19541296C2 DE 19541296 C2 DE19541296 C2 DE 19541296C2 DE 19541296 A DE19541296 A DE 19541296A DE 19541296 A DE19541296 A DE 19541296A DE 19541296 C2 DE19541296 C2 DE 19541296C2
Authority
DE
Germany
Prior art keywords
film
sectors
heating
heating elements
extruded
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 - Fee Related
Application number
DE19541296A
Other languages
German (de)
Other versions
DE19541296A1 (en
Inventor
Werner Dr Feistkorn
Klemens Sensen
Ansgar Avermeyer
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 DE19541296A priority Critical patent/DE19541296C2/en
Priority to AT0156396A priority patent/AT407854B/en
Priority to IT96BZ000043A priority patent/IT1288267B1/it
Priority to GB9621672A priority patent/GB2307881B/en
Priority to FR9613461A priority patent/FR2740722B1/en
Publication of DE19541296A1 publication Critical patent/DE19541296A1/en
Application granted granted Critical
Publication of DE19541296C2 publication Critical patent/DE19541296C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/08—Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • 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
    • B29C48/91—Heating, e.g. for cross linking
    • 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
    • B29C48/91—Heating, e.g. for cross linking
    • B29C48/9105—Heating, e.g. for cross linking of hollow articles
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Erwärmung der Foliensektoren eines aus einem Folienblaskopf einer Blasfolienextruderanlage extrudierten und anschließend aufgeblasenen Folienschlauches aus thermoplastischem Kunststoff nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for heating the film sectors extruded a film die head of a blown film extruder system and then inflated film tube made of thermoplastic material after the Preamble of claim 1.

Aus den deutschen Schriften DE 29 47 293 C2, DE 29 50 003 C2, DE 30 02 903 A1 sind Ver­ fahren zur Regelung der Foliendicke von in Blasfolienextruderanlagen hergestellten Folienschläuchen aus thermoplastischem Kunststoff bekannt. Diese Regelungs­ verfahren setzen voraus, daß der innere und/oder der äußere, den Austrittsspalt des Folienblaskopfes begrenzende Düsenring in Temperiersektoren aufgeteilt ist, die mit Temperierelementen und deren temperatursteuernden Einrichtungen verse­ hen sind, wobei sich durch entsprechende Beaufschlagung der Temperierelemente schnell ein geändertes Temperaturprofil über den Umfang des extrudierten Folien­ schlauches erreichen läßt, das den extrudierten Dick- und Dünnstellen in der Weise angepaßt ist, daß nach dem Aufblasen des extrudierten Folienschlauches zu einer Schlauchblase der Durchmesser der extrudierten Schlauchfolie über deren Umfang im wesentlichen konstant ist.From the German documents DE 29 47 293 C2, DE 29 50 003 C2, DE 30 02 903 A1 Ver drive to regulate the film thickness of blown film extruder systems Foil tubes made of thermoplastic material known. This regulatory procedures require that the inner and / or the outer, the exit gap of the film die head delimiting nozzle ring is divided into temperature control sectors, the verses with temperature control elements and their temperature-controlling devices hen are, whereby by appropriate exposure to the temperature control elements quickly a changed temperature profile across the circumference of the extruded film hose can reach that the extruded thick and thin places in the way is adapted that after inflating the extruded film tube to a Hose bubble the diameter of the extruded tubular film over its circumference is essentially constant.

Zur Ausführung der bekannten Regelungsverfahren sind die Temperiersektoren des Düsenringes mit Heizpatronen (DE 42 36 443 A1) oder mit Rohrleitungen ver­ sehen, die von einem wärmeabgebenden Medium durchströmt werden.The temperature control sectors are used to carry out the known control methods ver the nozzle ring with heating cartridges (DE 42 36 443 A1) or with pipes see that are flowed through by a heat-emitting medium.

Aus DE 38 02 146 C1 ist es bekannt, zur unterschiedlichen Erwärmung des extru­ dierten Folienschlauches Infrarotheizvorrichtungen zu verwenden. Infrarotheizele­ mente weisen jedoch den Nachteil auf, daß sie in unerwünschter Weise auf Vor­ richtungsteile des Folienblaskopfes erwärmen.From DE 38 02 146 C1 it is known for different heating of the extru died film tube infrared heaters to use. Infrared heater  However, elements have the disadvantage that they are undesirable Heat the directional parts of the film die head.

Aufgabe der Erfindung ist es, für eine Vorrichtung der eingangs angegebenen Art Heizelemente vorzuschlagen, mit der sich die Foliensektoren entsprechend der Steuerungen der Regelungsverfahren schnell in der erforderlichen Weise bei Be­ darf erwärmen lassen, ohne daß zusätzlich auch Vorrichtungsteile des Folienblas­ kopfes zusätzlich erwärmt werden.The object of the invention is for a device of the type specified Propose heating elements with which the film sectors correspond to the Controls of the regulatory process quickly in the required manner at Be may be allowed to warm up without additional device parts of the film blowing head are additionally heated.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 oder des Anspruchs 2 gelöst.According to the invention, this object is achieved by the features of claim 1 or of claim 2 solved.

Die Ultraschall- und/oder Mikrowellenheizelemente sind in einer dem Fachmann geläufigen Weise derart auszubilden, daß sie in den Temperiersektoren des Düsen­ rings, beispielsweise in zu der Schlauchachse des extrudierten Folienschlauches parallelen Bohrungen, untergebracht werden können.The ultrasonic and / or microwave heating elements are in a skilled person common way to train in the tempering sectors of the nozzle rings, for example in to the tube axis of the extruded film tube parallel holes can be accommodated.

Aus CH 672 092 ist die Verwendung von Ultraschallenergie im Zusammenhang mit einer Spritzgießform in der Weise bekannt, daß die Schmelze, die in die Spritz­ gießform eingespritzt wird, in der Region, in der die Schmelze nach den bekannten Verfahren nicht mehr weiterfließt, Ultraschallenergie zugeführt wird und daß die Zufuhr von Ultraschallenergie erst dann einsetzt, wenn die Schmelze jene Region erreicht hat und so lange andauert, bis der Einspritzvorgang beendet ist.From CH 672 092 the use of ultrasonic energy is related an injection mold in such a way known that the melt that is in the injection injection mold is injected in the region in which the melt according to the known Process no longer flows, ultrasonic energy is supplied and that the The supply of ultrasonic energy only begins when the melt melts that region has reached and continues until the injection process has ended.

Die berührungslose bedarfsweise Zuführung von Wärme nach der Erfindung ent­ sprechend den jeweiligen Regelungsverfahren zu den einzelnen Foliensektoren ist besonders vorteilhaft, da die Wärmeübertragung schnell erfolgen kann. Bei der be­ rührungslosen Wärmeübertragung entfällt die Trägheit bei der Wärmeübertragung über den Düsenring, die sich daraus ergibt, daß die Wärme über das Material des Düsenringes geleitet werden muß und sich darüberhinaus auch ein gewisser Aus­ gleich der unterschiedlichen Wärmemengen ergibt, die den einzelnen Sektoren zu­ geführt werden. The contactless supply of heat according to the invention ent corresponding to the respective regulatory procedures for the individual film sectors Particularly advantageous since the heat transfer can take place quickly. At the be contactless heat transfer eliminates the inertia in heat transfer on the nozzle ring, which results from the fact that the heat on the material of the Nozzle ring must be directed and also a certain out equal to the different amounts of heat that the individual sectors give be performed.  

Zweckmäßigerweise bestehen die Heizelemente aus einer der Anzahl der Folien­ sektoren entsprechenden Anzahl von Aktoren, die im Millisekundenbereich gepulst werden. Über dieses Pulsen läßt sich die jeweils zuzuführende Wärmemenge ge­ nau einstellen und steuern.The heating elements expediently consist of one of the number of foils Sectors corresponding number of actuators that pulsed in the millisecond range become. The amount of heat to be supplied can be generated via this pulsing set and control precisely.

Die berührungslosen Heizelemente können in vorteilhafter Weise auch aus Mikro­ wellenheizelementen bestehen. Diese Heizelemente können aus einer ringförmig um den extrudierten Folienschlauch herum angeordneten Energiequelle bestehen, wobei die einzelnen Foliensektoren beaufschlagende Blenden vorgesehen sind, deren Öffnungsquerschnitt in Abhängigkeit von der jeweils benötigten Wärmemen­ ge eingestellt wird.The non-contact heating elements can also advantageously be made of micro shaft heating elements exist. These heating elements can be made from a ring there is an energy source arranged around the extruded film tube, the individual film sectors being provided with diaphragms, the opening cross-section depending on the heat required is set.

Schließlich können die berührungslosen Heizelemente auch aus Lasern bestehen, wobei die Laserstrahlen oder Teilstrahlen durch entsprechende Spiegel auf die Fo­ liensektoren gerichtet werden. Dabei sollten die Laser im Absorptionsspektrum der Folie wirksam sein.Finally, the non-contact heating elements can also consist of lasers, wherein the laser beams or partial beams through appropriate mirrors on the Fo lien sectors. The lasers should be in the absorption spectrum of the Film to be effective.

Claims (2)

1. Vorrichtung zur Erwärmung der Foliensektoren eines aus einem Folienblas­ kopf einer Blasfolienextruderanlage extrudierten und anschließend aufgebla­ senen Folienschlauches aus thermoplastischem Kunststoff, bei der der innere und/oder äußere, den Austrittsspalt des Folienblaskopfes begrenzende Dü­ senring in Temperiersektoren aufgeteilt ist, die mit Temperierelementen und deren Temperatur steuernden Einrichtungen versehen sind, dadurch gekennzeichnet, daß die Temperierelemente aus Ultraschall- und/oder Mikrowellenheizele­ menten bestehen.1.Device for heating the film sectors of a film blowing head of a blown film extruder and extruded and then inflated film tube made of thermoplastic material, in which the inner and / or outer nozzle ring delimiting the outlet gap of the film die head is divided into temperature sectors, with temperature elements and their Temperature-controlling devices are provided, characterized in that the temperature control elements consist of ultrasound and / or microwave heating elements. 2. Vorrichtung zur Erwärmung der Foliensektoren eines aus einem Folienblas­ kopf einer Blasfolienextruderanlage extrudierten und anschließend aufgebla­ senen Folienschlauches aus thermoplastischem Kunststoff, dadurch gekennzeichnet, daß zur getrennten Erwärmung der Foliensektoren oberhalb des Austritts­ spalts des Folienblaskopfes jeweils auf die einzelnen Foliensektoren gerich­ tete aus Ultraschallheizelementen oder Mikrowellenheizelementen oder aus Lasern bestehende Heizelemente angeordnet sind, die die Foliensektoren be­ rührungslos mit Wärme beaufschlagen.2. Device for heating the foil sectors one from a blown film extruded head of a blown film extruder and then inflated its film tube made of thermoplastic, characterized, that for separate heating of the film sectors above the outlet gap of the film die head to the individual film sectors tete from ultrasonic heating elements or microwave heating elements or from Lasers existing heating elements are arranged that be the film sectors apply heat without contact.
DE19541296A 1995-11-06 1995-11-06 Device for heating the film sectors of a film tube extruded from a film blowing head Expired - Fee Related DE19541296C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19541296A DE19541296C2 (en) 1995-11-06 1995-11-06 Device for heating the film sectors of a film tube extruded from a film blowing head
AT0156396A AT407854B (en) 1995-11-06 1996-09-02 DEVICE FOR HEATING THE FILM SECTORS OF A TUBE FILM EXTRUDED FROM A FILM BLOW HEAD
IT96BZ000043A IT1288267B1 (it) 1995-11-06 1996-10-03 Dispositivo per il riscaldamento dei settori di un tubolare in foglia estruso da una testa di soffiatura.
GB9621672A GB2307881B (en) 1995-11-06 1996-10-17 An apparatus for heating the film sectors of a tubular film web extruded from a film blowing head
FR9613461A FR2740722B1 (en) 1995-11-06 1996-11-05 DEVICE FOR HEATING THE SHEET SECTORS OF A SHEATH EXTRUDED FROM A SHEET BLOWING HEAD

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19541296A DE19541296C2 (en) 1995-11-06 1995-11-06 Device for heating the film sectors of a film tube extruded from a film blowing head

Publications (2)

Publication Number Publication Date
DE19541296A1 DE19541296A1 (en) 1997-05-07
DE19541296C2 true DE19541296C2 (en) 1999-07-01

Family

ID=7776736

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19541296A Expired - Fee Related DE19541296C2 (en) 1995-11-06 1995-11-06 Device for heating the film sectors of a film tube extruded from a film blowing head

Country Status (5)

Country Link
AT (1) AT407854B (en)
DE (1) DE19541296C2 (en)
FR (1) FR2740722B1 (en)
GB (1) GB2307881B (en)
IT (1) IT1288267B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19725810B4 (en) * 1997-06-18 2005-07-07 Helmut Knorr Nozzle for dispensing liquefied plastic under pressure
DE102010007658A1 (en) * 2010-02-10 2012-05-10 Case Tech Gmbh Method for drying tubular casings by microwaves

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002903A1 (en) * 1980-01-28 1981-08-06 Windmöller & Hölscher, 4540 Lengerich METHOD FOR CONTROLLING THE FILM THICKNESS IN A BLOW FILM EXTRUDER SYSTEM
DE2950003C2 (en) * 1979-12-12 1983-08-11 Windmöller & Hölscher, 4540 Lengerich Process for regulating the film thickness on a blown film extruder
DE2947293C2 (en) * 1979-11-23 1983-09-15 Windmöller & Hölscher, 4540 Lengerich Process for regulating the film thickness on a blown film extruder
DE3802146C1 (en) * 1988-01-26 1989-02-23 Battenfeld Extrusionstechnik Gmbh, 4970 Bad Oeynhausen, De
CH672092A5 (en) * 1987-03-31 1989-10-31 Oco Ag Extending flow of injection mould shot - by energising ultrasonic sonotrode at right angles to flow path at area where flow of shot normally ceases
DE4236443A1 (en) * 1992-10-28 1994-05-05 Windmoeller & Hoelscher Temp. regulation of foil blowing head - for plastic bag foil mfr. using circuits for common and individual regulation of integrated heating cartridges

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112034A (en) * 1977-05-05 1978-09-05 General Electric Company Biaxial film process and rotary apparatus therefor
DD134052A1 (en) * 1977-12-08 1979-02-07 Jens Haupt ARRANGEMENT FOR THE VISCOSITIZATION LIGHTING OF PLASMA FILMS BY ULTRASOUND
DE3014989C2 (en) * 1980-04-18 1991-01-24 Windmöller & Hölscher, 4540 Lengerich Method for controlling the film thickness on a blown film extruder
US4373273A (en) * 1981-04-13 1983-02-15 Gloucester Engineering Co., Inc. Air ring having a circular array of a large multiplicity of substantially parallel cell-like passages in the air flow path leading to the outlet
US4377540A (en) * 1981-08-24 1983-03-22 Gloucester Engineering Co., Inc. Control of tubular film size
DE3518155A1 (en) * 1985-05-21 1986-11-27 Reifenhäuser GmbH & Co Maschinenfabrik, 5210 Troisdorf METHOD FOR PRODUCING A PLASTIC FILM WITH A LOW THICKNESS TOLERANCE
JPS62222827A (en) * 1986-03-25 1987-09-30 Micro Denshi Kk Thermal crosslink apparatus by extrusion molding machine for polymer material
DE3769480D1 (en) * 1986-01-16 1991-05-29 Micro Denshi Co Ltd MICROWAVE HEATING DEVICE.
US4882104A (en) * 1987-04-03 1989-11-21 Cincinnati Milacron, Inc. Method of controlling the thickness of an extruded plastic article
EP0423386B1 (en) * 1989-10-17 1993-07-28 Tomi Machinery Manfuacturing Co., Ltd. Synthetic resin film, method of uniforming the film thickness upon molding of such film and apparatus therefor
DE3936239A1 (en) * 1989-10-31 1991-05-02 Windmoeller & Hoelscher RING NOZZLE FOR EXTRESS PRESSES, PREFERABLY FILM BLOW HEAD
FR2701886B1 (en) * 1993-02-22 1995-06-02 Hutchinson Method for facilitating the flow of an elastomeric material through a tool, implementation system and machine equipped with such a system.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947293C2 (en) * 1979-11-23 1983-09-15 Windmöller & Hölscher, 4540 Lengerich Process for regulating the film thickness on a blown film extruder
DE2950003C2 (en) * 1979-12-12 1983-08-11 Windmöller & Hölscher, 4540 Lengerich Process for regulating the film thickness on a blown film extruder
DE3002903A1 (en) * 1980-01-28 1981-08-06 Windmöller & Hölscher, 4540 Lengerich METHOD FOR CONTROLLING THE FILM THICKNESS IN A BLOW FILM EXTRUDER SYSTEM
CH672092A5 (en) * 1987-03-31 1989-10-31 Oco Ag Extending flow of injection mould shot - by energising ultrasonic sonotrode at right angles to flow path at area where flow of shot normally ceases
DE3802146C1 (en) * 1988-01-26 1989-02-23 Battenfeld Extrusionstechnik Gmbh, 4970 Bad Oeynhausen, De
DE4236443A1 (en) * 1992-10-28 1994-05-05 Windmoeller & Hoelscher Temp. regulation of foil blowing head - for plastic bag foil mfr. using circuits for common and individual regulation of integrated heating cartridges

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DE-Z.: "iew Elektrowärme International" 48 (1990) B2, April, S.B64-B68 *
DE-Z.: "Plastverarbeiter" 38.Jg., 1987, Nr.9, S.182 *

Also Published As

Publication number Publication date
FR2740722A1 (en) 1997-05-09
DE19541296A1 (en) 1997-05-07
IT1288267B1 (it) 1998-09-11
ITBZ960043A1 (en) 1998-04-03
AT407854B (en) 2001-07-25
ATA156396A (en) 2000-11-15
FR2740722B1 (en) 2000-05-19
GB2307881A (en) 1997-06-11
GB9621672D0 (en) 1996-12-11
GB2307881B (en) 1999-04-28

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