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 piston

Info

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Withdrawn
Application number
FR7913084A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of FR2426500A1 publication Critical patent/FR2426500A1/en
Withdrawn legal-status Critical Current

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.
FR7913084A 1978-05-24 1979-05-23 Extruder for seamless tubes - has plunger system with compressed air operated auxiliary piston Withdrawn FR2426500A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
IT1095518B (en) 1985-08-10
BE876482A (en) 1979-09-17
DE2921073A1 (en) 1980-01-17
IT7823742A0 (en) 1978-05-24

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Legal Events

Date Code Title Description
ST Notification of lapse