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1. WO1991000797 - APPARATUS FOR MANUFACTURING RIBBED PIPES

Publication Number WO/1991/000797
Publication Date 24.01.1991
International Application No. PCT/FI1990/000178
International Filing Date 05.07.1990
Chapter 2 Demand Filed 29.10.1990
IPC
B29C 43/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
22of articles of indefinite length
B29C 47/12 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08Component parts, details or accessories; Auxiliary operations
12Extrusion nozzles or dies
B29D 23/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
23Producing tubular articles
CPC
B29C 43/224
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
22of articles of indefinite length
224having a profiled section, e.g. tubes, rods
B29C 48/09
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
B29C 48/13
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
13Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
B29C 48/30
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
30Extrusion nozzles or dies
B29C 48/303
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
30Extrusion nozzles or dies
303using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
B29D 23/001
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
23Producing tubular articles
001Pipes; Pipe joints
Applicants
  • UPONOR N.V. [NL/NL]; Emmaplein Fouress Building P.O. Box 259 Philipsburg Sint Maarten, AN (AllExceptUS)
  • JÄRVENKYLÄ, Jyri [FI/FI]; FI (UsOnly)
Inventors
  • JÄRVENKYLÄ, Jyri; FI
Agents
  • OY KOLSTER AB; P.O. Box 148 SF-00121 Helsinki, FI
Priority Data
89338312.07.1989FI
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) APPARATUS FOR MANUFACTURING RIBBED PIPES
(FR) APPAREIL DE FABRICATION DE TUYAUX RAINURES
Abstract
(EN)
This invention relates to an apparatus for manufacturing ribbed pipes. The central axis of the apparatus has a core (8, 9, 10) about which a material in a plastic state is extruded through a nozzle (11). The end of the core has a kernel (10) of a substantially constant diameter which calibrates the inner surface of the pipe. The outer surface of the pipe acquires its form from axially moving moulds (1, 2). The kernel has a heated initial zone and a cooled end zone (14, 15). In known apparatus, the grooves (13) of the moulds are often incompletely filled and the inner surface of the pipe is made uneven. These drawbacks can be avoided by disposing a cooled widening end face (20) at the outset of the end zone (15) of the kernel.
(FR)
Cette invention concerne un appareil qui sert à la fabrication de tuyaux rainurés. L'axe central de l'appareil possède un noyau (8, 9, 10) autour duquel un matériau à l'état plastique est extrudé à travers un ajutage. L'extrémité du noyau possède un c÷ur (10) de diamètre sensiblement constant qui calibre la surface intérieure du tuyau. L'on donne sa forme à la surface extérieure du tuyau au moyen de moules à déplacement axial (1, 2). Le c÷ur possède une zone initiale chauffée et une zone d'extrémité refroidie (14, 15). Dans les appareils connus, les rainures (13) des moules ne sont souvent pas entièrement remplis et la surface intérieure du tuyau est ainsi rendue irrégulière. Il est possible d'éviter ces inconvénients en disposant une face d'extrémité à élargissement refroidie (20) au début de la zone d'extrémité (15) du c÷ur.
Also published as
NO19915005
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