ATE33960T1 - Verfahren und vorrichtung zur herstellung von doppelwandigen thermoplastischen rohren mit aufgeweiteten abschnitten und hergestelltes rohr. - Google Patents

Verfahren und vorrichtung zur herstellung von doppelwandigen thermoplastischen rohren mit aufgeweiteten abschnitten und hergestelltes rohr.

Info

Publication number
ATE33960T1
ATE33960T1 AT83306648T AT83306648T ATE33960T1 AT E33960 T1 ATE33960 T1 AT E33960T1 AT 83306648 T AT83306648 T AT 83306648T AT 83306648 T AT83306648 T AT 83306648T AT E33960 T1 ATE33960 T1 AT E33960T1
Authority
AT
Austria
Prior art keywords
pipe
manufacture
double wall
expanded sections
walls
Prior art date
Application number
AT83306648T
Other languages
English (en)
Inventor
Manfred Arno Alfred Lupke
Original Assignee
Manfred Arno Alfred Lupke
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4124064&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE33960(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Manfred Arno Alfred Lupke filed Critical Manfred Arno Alfred Lupke
Application granted granted Critical
Publication of ATE33960T1 publication Critical patent/ATE33960T1/de

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/18—Pleated or corrugated hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
    • B26F1/0061—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes whereby the tube moves axially or radially
    • B26F1/0069—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes whereby the tube moves axially or radially and the tool travels with the tube
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
    • B29C48/0016—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die using a plurality of extrusion dies
    • 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
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/28—Blow-moulding apparatus
    • B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
    • B29C49/38—Blow-moulding apparatus having movable moulds or mould parts mounted on movable endless supports
    • 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
    • B29L2016/00—Articles with corrugations or pleats
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/003—Tubular articles having irregular or rough surfaces
    • 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
    • B29L2024/00—Articles with hollow walls
    • B29L2024/003—Articles with hollow walls comprising corrugated cores
    • 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
    • B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
AT83306648T 1982-12-02 1983-11-01 Verfahren und vorrichtung zur herstellung von doppelwandigen thermoplastischen rohren mit aufgeweiteten abschnitten und hergestelltes rohr. ATE33960T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000416840A CA1187258A (en) 1982-12-02 1982-12-02 Method and apparatus for forming a double walled thermoplastic tube with integral bells
EP83306648A EP0108598B1 (de) 1982-11-02 1983-11-01 Verfahren und Vorrichtung zur Herstellung von doppelwandigen thermoplastischen Rohren mit aufgeweiteten Abschnitten und hergestelltes Rohr

Publications (1)

Publication Number Publication Date
ATE33960T1 true ATE33960T1 (de) 1988-05-15

Family

ID=4124064

Family Applications (1)

Application Number Title Priority Date Filing Date
AT83306648T ATE33960T1 (de) 1982-12-02 1983-11-01 Verfahren und vorrichtung zur herstellung von doppelwandigen thermoplastischen rohren mit aufgeweiteten abschnitten und hergestelltes rohr.

Country Status (8)

Country Link
US (1) US4534923A (de)
EP (1) EP0108598B1 (de)
JP (2) JPS59111822A (de)
KR (1) KR860000647B1 (de)
AT (1) ATE33960T1 (de)
AU (1) AU557436B2 (de)
CA (1) CA1187258A (de)
DE (1) DE3376477D1 (de)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1194662A (en) * 1983-07-12 1985-10-08 Lupke, Manfred A. A. Producing double-walled helically wound thermoplastic pipe
US4500284A (en) * 1983-09-16 1985-02-19 Lupke Manfred Arno Alfred Forming single wall bells in double wall pipe
SE449456B (sv) * 1983-11-15 1987-05-04 Uponor Ab Forfarande och anordning for framstellning av ror varvid formbacksdelarna er delade i formstreckans lengsriktning
JPS61293821A (ja) * 1985-06-21 1986-12-24 Takiron Co Ltd コルゲ−ト管のスリ−ブの成形方法
US4867203A (en) * 1985-08-23 1989-09-19 Wavin Bv A method of relining or preparing sewage pipe using a plastic pipe comprising an outer corrugated pipe and a smooth inner wall
FI74654C (fi) * 1986-01-13 1988-03-10 Uponor Nv Anordning och foerfarande foer framstaellning av kamflaensroer.
FI77405C (fi) * 1986-03-20 1989-03-10 Uponor Nv Foerfarande och anordning foer framstaellning av kamflaensroer.
US4936768A (en) * 1986-03-25 1990-06-26 Lupke Manfred Arno Alfred Extrusion die for externally ribbed plastic tubing
DE3610667A1 (de) * 1986-03-29 1987-10-01 Wilhelm Hegler Doppelrohr bestehend aus zwei einstueckig ueber einen steg miteinander verbundenen schutzrohren
DE3701822A1 (de) * 1987-01-22 1988-08-11 Uponor Nv Verfahren und anordnung zum strangpressen von kunststoffrohren
NL8701164A (nl) * 1987-05-14 1988-12-01 Wavin Bv Kunststofbuis met aan het buitenoppervlak massieve dwarsribben, inrichting voor toepassing in een installatie voor het vormen van dergelijke buizen; installatie voor het vormen van buizen die een dergelijke inrichting omvat en werkwijze voor het vormen van een kunststofbuis onder toepassing van een dergelijke installatie.
CA1303315C (en) * 1988-09-16 1992-06-16 Manfred A.A. Lupke Apparatus for producing pipe with annular ribs
DE3939052C2 (de) * 1989-11-25 2003-11-06 Pipelife Rohrsysteme Gmbh Verfahren zur Herstellung eines über Muffenverbindungen mit einem gleichen oder einem anderen Rohr verbindbaren Leitungsrohres aus Kunststoff
JP3219407B2 (ja) 1990-11-26 2001-10-15 エクセル株式会社 多層プラスチック管及びその製造方法
DE4111229A1 (de) * 1991-04-08 1992-10-15 Wilhelm Hegler Vorrichtung zur herstellung von kunststoff-rohren
US5324557A (en) * 1991-06-06 1994-06-28 Lupke Manfred Arno Alfred Multi-skin annularly ribbed tube
US5516482A (en) * 1991-06-14 1996-05-14 Corma Inc. Travelling mold tunnel apparatus for smooth walled pipe
DE4210482A1 (de) * 1992-03-31 1993-10-07 Wilhelm Hegler Verfahren und Vorrichtung zur fortlaufenden Herstellung eines Verbundrohres mit Rohr-Muffe
CA2072663C (en) * 1992-06-29 1999-11-16 Manfred A. A. Lupke Method and apparatus for forming a double walled thermoplastic tube with integral bells
US5330699A (en) * 1993-03-29 1994-07-19 The Hoover Company Vacuum cleaner hose and method for making same
US5531583A (en) * 1993-04-15 1996-07-02 Cullom Machine Tool & Die, Inc. Vacuum mold blocks with cooling for corrugated tubing
JP3210673B2 (ja) * 1993-06-30 2001-09-17 ループケ、マンフレッド・エー・エー ベル一体化二重壁熱可塑性チューブを形成する方法及び装置
FR2718509B1 (fr) * 1994-04-07 1996-08-30 Courant Ets Sa Procédé et dispositif pour la réalisation de tulipes sur des tubes annelés à deux parois.
US5435962A (en) * 1994-05-24 1995-07-25 Crushproof Tubing Company Rubber tubing with axially spaced annularly corrugated flexible segments
JPH11503217A (ja) * 1995-04-03 1999-03-23 ウポノール・ベー・ブイ 波形管の製造方法及びこの方法により製造された波形管
US5996639A (en) * 1997-01-30 1999-12-07 Action Technology Multiple compartment corrugated hose
DE19724113A1 (de) * 1997-06-09 1998-12-10 Ralph Peter Dr Hegler Verbundrohr mit angeformter Rohr-Muffe und Verfahren zu dessen Herstellung
DE19848470A1 (de) * 1998-10-21 2000-04-27 Ralph Peter Hegler Verfahren zur fortlaufenden Herstellung eines Verbundrohres mit einer Rohr-Muffe und Vorrichtung zur Durchführung des Verfahrens
US6399002B1 (en) * 1998-11-23 2002-06-04 Manfred A. A. Lupke Method of making a pipe with coupling conforming to pipe diameter
US6641884B1 (en) * 2000-08-09 2003-11-04 Teleflex Fluid Systems Corrugated hose assembly
CA2404772C (en) * 2001-03-02 2006-11-21 Manfred A. A. Lupke Method and device for manufacturing a double-walled, thermoplastic tube with a connecting sleeve
DE10117126C1 (de) * 2001-04-06 2002-08-01 Unicor Rohrsysteme Gmbh Vorrichtung zur Herstellung von Doppelwand-Wellrohren
ITAN20010012U1 (it) * 2001-05-14 2002-11-14 Sirci S R L Raccordo in polietilene corrugato per tubazioni per l'edilizia e per fognature
JP2003211522A (ja) * 2002-01-23 2003-07-29 Denki Kagaku Kogyo Kk ニ重壁コルゲート管の製造方法
JP3878026B2 (ja) * 2002-02-14 2007-02-07 電気化学工業株式会社 ニ重壁コルゲート管の製造方法
US20050106280A1 (en) * 2003-11-18 2005-05-19 Karr Gary L. Die apparatus for forming corrugated pipe
PL1612030T3 (pl) * 2004-07-03 2008-01-31 Hegler Ralph Peter Sposób ciągłej produkcji dwuściennej rury karbowanej z kielichem rury, dwuścienna rura karbowana i urządzenie do realizacji sposobu
US8733405B2 (en) 2005-03-14 2014-05-27 Advanced Drainage Systems, Inc. Corrugated pipe with outer layer
CA2622692C (en) 2007-02-26 2015-10-06 Advanced Drainage Systems, Inc. Defined ratio dual-wall pipe die
CA2622695C (en) 2007-02-26 2015-11-03 Advanced Drainage Systems, Inc. Pipe extrusion die flow path apparatus and method
CA2588058C (en) * 2007-05-08 2014-07-15 Stefan A. Lupke Alignable cooling plug for extruder
US8820801B2 (en) 2007-11-16 2014-09-02 Advanced Drainage System, Inc. Multi-wall corrugated pipe couplings and methods
US8820800B2 (en) 2007-11-16 2014-09-02 Advanced Drainage Systems, Inc. Multi-wall corrugated pipe couplings and methods
US8114324B2 (en) 2008-10-14 2012-02-14 Advanced Drainage Systems, Inc. Apparatus and method for pressing an outer wall of pipe
US7988438B2 (en) * 2008-02-11 2011-08-02 Advanced Drainage Systems, Inc. Extrusion die vacuum seals
US8550807B2 (en) * 2008-05-28 2013-10-08 Advanced Drainage Systems, Inc. In-mold punch apparatus and methods
SI3180553T1 (en) * 2015-02-12 2018-02-28 Den Di De Nora, Paolo Expandable tube
GR1009144B (el) * 2016-07-14 2017-10-20 Εμμ. Κουβιδης Α.Β.Ε.Ε. Πλαστικος σωληνας διπλου δομημενου τοιχωματος σε μικρες διαμετρους
JP6690572B2 (ja) 2017-02-08 2020-04-28 トヨタ自動車株式会社 減圧断熱配管構造
JP6733573B2 (ja) * 2017-02-15 2020-08-05 トヨタ自動車株式会社 減圧断熱配管構造
CN119567534B (zh) * 2025-01-07 2025-11-21 浙江康骏机械有限公司 一种淋膜纸复合用的高温持续挤出设备

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898941A (en) * 1956-10-10 1959-08-11 Davol Rubber Co Inhaler tube
US3286305A (en) * 1964-09-03 1966-11-22 Rexall Drug Chemical Apparatus for continuous manufacture of hollow articles
AT325299B (de) * 1967-02-27 1975-10-10 Hegler Wilhelm Vorrichtung zur herstellung von rohren aus thermoplastischem kunststoff
US3743457A (en) * 1971-07-13 1973-07-03 Acme Hamilton Mfg Corp Stock flow control means for extruders and the like
US3897090A (en) * 1972-05-19 1975-07-29 Plastic Tubing Corrugated plastic pipe with integrally formed coupler
US3859025A (en) * 1972-07-13 1975-01-07 Ernest J Maroschak Apparatus for making corrugated plastic pipes with integral coupler collar
DE2409020C3 (de) * 1974-02-25 1979-09-27 Fraenkische Isolierrohr- & Metallwaren-Werke, Gebr. Kirchner, 8729 Koenigsberg Verfahren und Vorrichtung zum Herstellen dünnwandiger Drainagerohre aus Kunststoff
FR70398E (fr) * 1974-03-22 1959-04-06 Electronique & Physique Perfectionnements aux dispositifs de prise de vues de télévision et cinématographie
JPS5143497A (de) * 1974-10-12 1976-04-14 Toray Industries
DE2525127A1 (de) * 1975-06-05 1976-12-23 Rainer Isolierrohr Drossbach Verfahren und vorrichtungen zum einbringen von wassereintrittsoeffnungen in draen- bzw. filterrohre aus thermoplastischem kunststoff
CA1083766A (en) * 1977-02-07 1980-08-19 Gerd P.H. Lupke Apparatus for producing thermoplastic tubing
NL175224C (nl) * 1979-01-09 Wavin Bv Kunststofbuis met ten minste een rondlopende groef.
US4305703A (en) * 1980-09-12 1981-12-15 Lupke Manfred Arno Alfred Composite die assembly for use in the production of thermoplastic tubing

Also Published As

Publication number Publication date
CA1187258A (en) 1985-05-21
AU557436B2 (en) 1986-12-18
JPH0520515Y2 (de) 1993-05-27
AU2113083A (en) 1984-06-07
EP0108598B1 (de) 1988-05-04
EP0108598A3 (en) 1985-11-13
JPS59111822A (ja) 1984-06-28
EP0108598A2 (de) 1984-05-16
KR860000647B1 (ko) 1986-05-28
KR840006932A (ko) 1984-12-04
JPH04128826U (ja) 1992-11-25
DE3376477D1 (en) 1988-06-09
US4534923A (en) 1985-08-13

Similar Documents

Publication Publication Date Title
ATE33960T1 (de) Verfahren und vorrichtung zur herstellung von doppelwandigen thermoplastischen rohren mit aufgeweiteten abschnitten und hergestelltes rohr.
HU175927B (en) Method for producing such double-walled plastic tube the outer wall of which is cross corrugated but the inner one is smooth
ATE152663T1 (de) Verfahren und vorrichtung zur herstellung von röhren zur tropfenweisen bewässerung
DE3874123D1 (de) Polyolefinharzrohre fuer die verwirklichung von rohrleitungen, muffe zu ihrem zusammenfuegen und verfahren zu ihrer herstellung.
ATA440874A (de) Verfahren und vorrichtung zur herstellung von doppelwandigen rohren aus thermoplastischem kuststoff mit ring- oder schraubenfoermig gerillter aussenwand und glatter innenwand
ATE48560T1 (de) Verfahren und vorrichtung zur herstellung von querprofilierten rohren.
NZ184196A (en) Thermoplastic multi-walled pipes and method of joining same to single walled thermoplastic pipe
LU81462A1 (de) Arbeitsweise zur herstellung schraubenfoermig gewickelter rohre und danach hergestelltes rohr
AT369321B (de) Verfahren zur kontinuierlichen herstellung waermeisolierter leitungsrohre
DE69012129D1 (de) Verfahren zum formen von rohren unter verwendung von pneumatischem unter- und überdruck an der oberfläche des kühldorns.
ATE69097T1 (de) Leitung zur wiederbeschichtung von unterirdischen leitungen.
JPS5571267A (en) Extrusion tube and method of producing same
ATE38420T1 (de) Verfahren und vorrichtung zur herstellung einer fluessigkeits- und gasdichten verbindung zwischen kunststoffrohren und verbindungsstuecken.
AT360820B (de) Verfahren zur herstellung von rohren mit ueber ihre laenge unterschiedlicher wanddicke
ATE2914T1 (de) Mit einer isolierenden schicht versehenes kunststoffrohrstueck und verfahren zu seiner herstellung.
ATA239283A (de) Verfahren zur herstellung von gestaengerohren und dorn- oder stopfenloses schraegwalzgeruest zur durchfuehrung des verfahrens
SE8704210D0 (sv) Ror for infodring av tryckvattenledningar
ATE72525T1 (de) Verfahren und vorrichtung zur herstellung eines schraubennahtrohres.
JPS52140460A (en) Method of fabricating multistage pipes having different diameters
DE3216960A1 (de) Verfahren zur herstellung eines rohres mit an seiner oberflaeche schraubenlinienfoermig verlaufenden rippen
DE3784171D1 (de) Schallabsorbierendes rohr.
AT345639B (de) Verfahren und vorrichtung zur herstellung einer falzverbindung zwischen rohrleitungsabschnitten
JPS53134149A (en) Method of producing plastic pipe revet
JPS57199514A (en) Manufacture of multilayered tube
AT346159B (de) Verfahren und vorrichtung zur herstellung gewellter feuerrohre

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee