FR2267193A1 - Mandrel for forming undercut channels in thermoplastic pipe sockets - using a hydrostatic collar suitable for relatively small bore pipes - Google Patents
Mandrel for forming undercut channels in thermoplastic pipe sockets - using a hydrostatic collar suitable for relatively small bore pipesInfo
- Publication number
- FR2267193A1 FR2267193A1 FR7412367A FR7412367A FR2267193A1 FR 2267193 A1 FR2267193 A1 FR 2267193A1 FR 7412367 A FR7412367 A FR 7412367A FR 7412367 A FR7412367 A FR 7412367A FR 2267193 A1 FR2267193 A1 FR 2267193A1
- Authority
- FR
- France
- Prior art keywords
- mandrel
- socket
- membrane
- plunger
- hydrostatic
- 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.)
- Granted
Links
- 230000002706 hydrostatic effect Effects 0.000 title 1
- 229920001169 thermoplastic Polymers 0.000 title 1
- 239000004416 thermosoftening plastic Substances 0.000 title 1
- 239000012528 membrane Substances 0.000 abstract 5
- 239000002826 coolant Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
Classifications
-
- 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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
- B29C57/06—Belling or enlarging, e.g. combined with forming a groove using mechanical means elastically deformable
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Mandrel for generating an internal channel in the mouth of a pipe joint socket. The pipe end is forced over a mandrel nose which enlarges the end to form the basic socket. An ancillary plunger can then be moved coaxially within the mandrel so that a collar on the plunger can compress an annular chamber contg. an elastic solid or a hydraulic fluid capped with an elastic membrane. The membrane is thus forced radially outwards deforming the socket wall. The membrane is profiled so that the central region is stiff enough to maintain a flat profile while relatively thin hinge zones distort preferentially along the edges of the chamber. The socket zone being deformed is enclosed by an external membrane beneath which coolant can be circulated to freeze the deformed socket wall to allow subsequent withdrawal without distortion. The plunger is reversed to allow the membrane to retract prior to withdrawal of the socket end. Compact design for expandable mandrel, can be made small enough for forming sockets on pipe of =75 mm dia.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7412367A FR2267193A1 (en) | 1974-04-09 | 1974-04-09 | Mandrel for forming undercut channels in thermoplastic pipe sockets - using a hydrostatic collar suitable for relatively small bore pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7412367A FR2267193A1 (en) | 1974-04-09 | 1974-04-09 | Mandrel for forming undercut channels in thermoplastic pipe sockets - using a hydrostatic collar suitable for relatively small bore pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2267193A1 true FR2267193A1 (en) | 1975-11-07 |
FR2267193B1 FR2267193B1 (en) | 1976-12-17 |
Family
ID=9137426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7412367A Granted FR2267193A1 (en) | 1974-04-09 | 1974-04-09 | Mandrel for forming undercut channels in thermoplastic pipe sockets - using a hydrostatic collar suitable for relatively small bore pipes |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2267193A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2395124A1 (en) * | 1977-06-21 | 1979-01-19 | Sica Spa | DEVICE FOR FORMING THE LOCATION FOR THE SEAL IN PLASTIC PIPES SLEEVE CLUTCHES |
NL1015860C2 (en) * | 2000-08-02 | 2002-02-05 | Wavin Bv | Methods and devices for manufacturing a tube of biaxially oriented thermoplastic plastic material with an integral sleeve. |
-
1974
- 1974-04-09 FR FR7412367A patent/FR2267193A1/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2395124A1 (en) * | 1977-06-21 | 1979-01-19 | Sica Spa | DEVICE FOR FORMING THE LOCATION FOR THE SEAL IN PLASTIC PIPES SLEEVE CLUTCHES |
NL1015860C2 (en) * | 2000-08-02 | 2002-02-05 | Wavin Bv | Methods and devices for manufacturing a tube of biaxially oriented thermoplastic plastic material with an integral sleeve. |
WO2002009926A1 (en) * | 2000-08-02 | 2002-02-07 | Wavin B.V. | Methods and devices for the production of a pipe from biaxially oriented thermoplastic material having an integrated socket |
US7069635B2 (en) | 2000-08-02 | 2006-07-04 | Wavin B.V. | Methods and devices for the production of a pipe from biaxialy oriented thermoplastic material having an integrated socket |
Also Published As
Publication number | Publication date |
---|---|
FR2267193B1 (en) | 1976-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |