FR2426500A1 - Extruder for seamless tubes - has plunger system with compressed air operated auxiliary piston - Google Patents
Extruder for seamless tubes - has plunger system with compressed air operated auxiliary pistonInfo
- Publication number
- FR2426500A1 FR2426500A1 FR7913084A FR7913084A FR2426500A1 FR 2426500 A1 FR2426500 A1 FR 2426500A1 FR 7913084 A FR7913084 A FR 7913084A FR 7913084 A FR7913084 A FR 7913084A FR 2426500 A1 FR2426500 A1 FR 2426500A1
- Authority
- FR
- France
- Prior art keywords
- extruder
- compressed air
- auxiliary piston
- air operated
- piston
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
- B21B21/04—Pilgrim-step feeding mechanisms
- B21B21/045—Pilgrim-step feeding mechanisms for reciprocating stands
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The extruder has a piston which carries a die inside a cylinder. One end of the cylinder is opened and the other is fitted with the hydraulic cylinder carrying the piston and rod. The cylinder is supplied from a reservoir through the necessary non return valves. The main piston is assisted by means of a supply of compressed air which is fed to the back of the piston. The system is supplied with the necessary non return valves.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT23742/78A IT1095518B (en) | 1978-05-24 | 1978-05-24 | DEVICE FOR THE ADJUSTMENT OF THE FEEDING CASE FOR PELLEGRINO ROLLING MACHINES FOR PIPES WITHOUT WELDING |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2426500A1 true FR2426500A1 (en) | 1979-12-21 |
Family
ID=11209595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7913084A Withdrawn FR2426500A1 (en) | 1978-05-24 | 1979-05-23 | Extruder for seamless tubes - has plunger system with compressed air operated auxiliary piston |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE876482A (en) |
DE (1) | DE2921073A1 (en) |
FR (1) | FR2426500A1 (en) |
IT (1) | IT1095518B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2011531A1 (en) * | 1968-06-20 | 1970-03-06 | Calmes Jean Paul | |
FR2027918A1 (en) * | 1969-01-08 | 1970-10-02 | Innocenti Ind Metallurg | |
FR2326992A1 (en) * | 1973-12-06 | 1977-05-06 | Diosgyoeri Gepgyar | Hydraulic feed unit for pilger tube rolling mill - uses concentric air and oil cylinders for higher speed |
BE863351A (en) * | 1977-03-29 | 1978-05-16 | Sardelli Bruno | SUPPLY BOX FOR PILGRIM STEP LAMINERS FOR SEAMLESS PIPES |
-
1978
- 1978-05-24 IT IT23742/78A patent/IT1095518B/en active
-
1979
- 1979-05-23 DE DE19792921073 patent/DE2921073A1/en not_active Withdrawn
- 1979-05-23 BE BE0/195336A patent/BE876482A/en unknown
- 1979-05-23 FR FR7913084A patent/FR2426500A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2011531A1 (en) * | 1968-06-20 | 1970-03-06 | Calmes Jean Paul | |
FR2027918A1 (en) * | 1969-01-08 | 1970-10-02 | Innocenti Ind Metallurg | |
FR2326992A1 (en) * | 1973-12-06 | 1977-05-06 | Diosgyoeri Gepgyar | Hydraulic feed unit for pilger tube rolling mill - uses concentric air and oil cylinders for higher speed |
BE863351A (en) * | 1977-03-29 | 1978-05-16 | Sardelli Bruno | SUPPLY BOX FOR PILGRIM STEP LAMINERS FOR SEAMLESS PIPES |
Also Published As
Publication number | Publication date |
---|---|
DE2921073A1 (en) | 1980-01-17 |
IT1095518B (en) | 1985-08-10 |
BE876482A (en) | 1979-09-17 |
IT7823742A0 (en) | 1978-05-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |