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1. (WO1989000492) A METHOD OF FORMING STABLE SOCKETS IN POLYETHYLENE PIPES, WITH OR WITHOUT REINFORCEMENT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1989/000492 International Application No.: PCT/IT1988/000051
Publication Date: 26.01.1989 International Filing Date: 13.07.1988
IPC:
B29C 57/04 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
57
Shaping of tube ends, e.g. flanging, belling, closing; Apparatus therefor
02
Belling or enlarging, e.g. combined with forming a groove
04
using mechanical means
Applicants:
TASSINARI, Giuseppe [IT/IT]; IT
Inventors:
TASSINARI, Giuseppe; IT
Agent:
LANZONI, Luciano; Bugnion S.p.A. Via Farini, 37 I-40124 Bologna, IT
Priority Data:
3557 A/8716.07.1987IT
Title (EN) A METHOD OF FORMING STABLE SOCKETS IN POLYETHYLENE PIPES, WITH OR WITHOUT REINFORCEMENT
(FR) PROCEDE PERMETTANT DE FORMER DES TUBULURES DE RACCORDEMENT STABLES DANS DES TUBES DE POLYETHYLENE, AVEC OU SANS RENFORCEMENT
Abstract:
(EN) A method of shaping the end of a polyethylene pipe into a socket that will remain stable and secure, with or without added reinforcement, which involves gripping the softened end (6) of the pipe (1) in the bore of a die (2) and enlarging it with a first plug (3), then forcing it into the bore with a second plug (4) that slides over the first in the manner of a sheath, to the end of stabilizing the stretch (5) at which the change in diameter occurs; with the socket formed, the end of the pipe is left to cool at a controlled temperature.
(FR) Procédé permettant de donner à l'extrémité d'un tube de polyéthylène une forme de tubulure de raccordement qui demeurera stable et fixe, avec ou sans renforcement, consistant à serrer l'extrémité (6) ramollie du tube (1) dans l'alésage d'une matrice (2) et à l'élargir avec un poinçon (3), ensuite à la faire passer de force dans l'alésage avec un second poinçon (4) qui glisse sur le premier à la manière d'une gaine, afin de stabiliser l'étirage (5), moment auquel se produit le changement de diamètre. Une fois le raccordement formé, on laisse refroidir l'extrémité du tube à une température régulée.
Designated States: AU, BG, BR, DK, FI, HU, JP, KR, NO, RO, SU, US
European Patent Office (AT, BE, CH, DE, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1988020794