FR1464748A - Improvement in the attachment of molded elastic ends to the ends of flexible metal pipes - Google Patents
Improvement in the attachment of molded elastic ends to the ends of flexible metal pipes Download PDFInfo
- Publication number
- FR1464748A FR1464748A FR39204A FR39204A FR1464748A FR 1464748 A FR1464748 A FR 1464748A FR 39204 A FR39204 A FR 39204A FR 39204 A FR39204 A FR 39204A FR 1464748 A FR1464748 A FR 1464748A
- Authority
- FR
- France
- Prior art keywords
- overmolded
- sheath
- core
- pipe
- metal
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/01—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses adapted for hoses having a multi-layer wall
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Perfectionnement à la fixation des embouts élastiques moulés aux extrémités des tuyaux métalliques flexibles. Pour certaines applications, les tuyaux souples comportent des embouts élastiques de raccordement, à leurs extrémités. C'est notamment le cas pour les tuyaux souples de raccordement des appareils mé nagers alimentés au gaz et il importe, dans cette dernière application, que fa fixation des embouts élastiques aux extrémités du tuyau assure toutes garanties d'étanchéité, pendant une longue période de temps. Improvement in the attachment of elastic molded ends to the ends of flexible metal pipes. For some applications, flexible hoses have elastic connecting end pieces at their ends. This is particularly the case for the flexible connection pipes of household appliances supplied with gas and it is important, in this latter application, that the fixing of the elastic end pieces to the ends of the pipe ensure full sealing guarantees, for a long period of time. time.
La présente invention apporte les moyens néces saires à cet effet, lorsque le tuyau souple est un tuyau métallique spiralé recouvert par une gaine en matière plastique appropriée, par exemple le chlo rure de polyvinyle, les embouts élastiques généra lement en caoutchouc, étant surmoulés aux extré mités du tuyau souple, de manière connue en soi. The present invention provides the necessary means for this purpose, when the flexible pipe is a spiral metal pipe covered by a sheath of suitable plastic material, for example polyvinyl chloride, the elastic end pieces generally made of rubber, being overmolded at the ends. mites of the flexible pipe, in a manner known per se.
L'invention sera au mieux décrite en se référant au dessin annexé qui représente, partie en coupe longitudinale et partie en vue extérieure, un tuyau de raccordement conforme à l'invention. The invention will be best described with reference to the accompanying drawing which shows, part in longitudinal section and part in external view, a connection pipe according to the invention.
L'âme du tuyau métallique souple spiralé, de réalisation quelconque par lui-même, et schémati quement représentée, est désignée par 1. Cette âme, de manière connue, forme à sa surface exté rieure une gorge hélicoïdale 2. Sur l'âme 1 est engagée une gaine extérieure 3 en matière plas tique appropriée, par exemple en PVC, comme on l'a indiqué, ladite gaine possédant une surface exté rieure 4 et une surface intérieure 5 normalement lisses. The core of the spiral flexible metal pipe, of any embodiment by itself, and schematically shown, is designated by 1. This core, in a known manner, forms a helical groove on its outer surface 2. On the core 1 is engaged an outer sheath 3 of suitable plastic material, for example PVC, as indicated, said sheath having an outer surface 4 and an inner surface 5 normally smooth.
L'embout élastique de raccordement, par exem ple en caoutchouc, et surmoulé de manière connue aux extrémités du tuyau souple, est désigné par 6. The elastic connecting piece, for example made of rubber, and overmolded in a known manner at the ends of the flexible pipe, is designated by 6.
Conformément à une :première caractéristique de l'invention, la gaine extérieure 3 est supprimée, à chaque extrémité du tuyau souple, de façon à dé couvrir sur une certaine longueur l'âme intérieure métallique 1. Ainsi, lorsque l'embout élastique 6 est surmoulé à l'extrémité du tuyau souple, ii adhère tant à la gaine extérieure 3, sur une cer taine longueur, qu'à l'âme métallique 1, réalisant ainsi d'une part un collage caoutchouc-matière plas tique et d'autre part un collage caoutchouc-métal, ce qui double les chances d'une adhérence et d'une étanchéité parfaites. In accordance with a: first characteristic of the invention, the outer sheath 3 is removed, at each end of the flexible pipe, so as to uncover over a certain length the metal inner core 1. Thus, when the elastic end piece 6 is overmolded at the end of the flexible pipe, it adheres both to the outer sheath 3, over a certain length, to the metal core 1, thus achieving on the one hand a rubber-plastic bond and on the other apart from a rubber-to-metal bond, which doubles the chances of perfect adhesion and sealing.
Suivant une autre caractéristique de l'invention, une lèvre intérieure 7 appartenant à l'embout vient chevaucher l'extrémité de l'âme métallique 1, s'op posant ainsi à des amorces de décollement dans cette zone. According to another characteristic of the invention, an inner lip 7 belonging to the end piece overlaps the end of the metal core 1, thus opposing detachment initiators in this zone.
Une autre lèvre 8, égaiement de faible épaisseur, prolonge d'autre part l'extrémité intérieure de l'em bout surmoulé, créant ainsi une zone de raccorde ment à flexibilité intermédiaire entre le tuyau et l'embout, pour s'opposer efficacement là encore à des amorces de décollement entre tube et embout. Another lip 8, also thin, extends on the other hand the inner end of the molded end, thus creating a connection area with intermediate flexibility between the pipe and the end piece, to effectively oppose there still the beginnings of separation between tube and tip.
On observera enfin que, sous l'effet combiné de la chaleur et de la pression appliquées lors du sur- mouiaâc de l'embout sur le tuyau la gaine exté rieure 3, qui est faite en une matière thermoplas tique, vient fluer dans la gorge hélicoïdale exté rieure 2 de l'âme métallique, ainsi qu'on l'a in diqué en 9, grâce à quoi une solidarisation intime est encore assurée entre l'âme métallique et la gaine extérieure 3, dans cette zone. Finally, it will be observed that, under the combined effect of the heat and the pressure applied during the overwetting of the nozzle on the pipe, the outer sheath 3, which is made of a thermoplastic material, creeps in the throat. outer helical 2 of the metal core, as indicated in 9, whereby an intimate connection is still ensured between the metal core and the outer sheath 3, in this area.
Tous ces moyens réunis concourent à la réalisa tion d'un tuyau métallique souple gainé plastique dont la jonction aux embouts élastiques qu'il porte à ses extrémités offre toutes garanties d'étanchéité et de solidité.All these means taken together contribute to the production of a flexible metal hose coated with plastic, the junction of which to the elastic end pieces which it carries at its ends offers all guarantees of tightness and solidity.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR39204A FR1464748A (en) | 1965-11-22 | 1965-11-22 | Improvement in the attachment of molded elastic ends to the ends of flexible metal pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR39204A FR1464748A (en) | 1965-11-22 | 1965-11-22 | Improvement in the attachment of molded elastic ends to the ends of flexible metal pipes |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1464748A true FR1464748A (en) | 1967-01-06 |
Family
ID=1582608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR39204A Expired FR1464748A (en) | 1965-11-22 | 1965-11-22 | Improvement in the attachment of molded elastic ends to the ends of flexible metal pipes |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1464748A (en) |
-
1965
- 1965-11-22 FR FR39204A patent/FR1464748A/en not_active Expired
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