EP0285435A3 - A ram for a press - Google Patents

A ram for a press Download PDF

Info

Publication number
EP0285435A3
EP0285435A3 EP88302930A EP88302930A EP0285435A3 EP 0285435 A3 EP0285435 A3 EP 0285435A3 EP 88302930 A EP88302930 A EP 88302930A EP 88302930 A EP88302930 A EP 88302930A EP 0285435 A3 EP0285435 A3 EP 0285435A3
Authority
EP
European Patent Office
Prior art keywords
hydraulic
piston
region
ram
press
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Withdrawn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
EP88302930A
Other languages
German (de)
French (fr)
Other versions
EP0285435A2 (en
Inventor
Gordon Clavell Cox
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.)
Leslie Hartridge Ltd
Original Assignee
Leslie Hartridge Ltd
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 Leslie Hartridge Ltd filed Critical Leslie Hartridge Ltd
Publication of EP0285435A2 publication Critical patent/EP0285435A2/en
Publication of EP0285435A3 publication Critical patent/EP0285435A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/165—Control arrangements for fluid-driven presses for pneumatically-hydraulically driven presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

A ram for a press, comprising an hydraulic piston and cylinder arrangement (10,22) which is operated by the application of pressure to hydraulic fluid in a region of the hydraulic chamber (16) within the cylinder (10) which is on one side of the piston (22). Hydraulic fluid is free to flow into and out of the said region until the hydraulic piston (22) nears the end of its stroke. The bottom end (44) of the chamber (16) is narrowed, to cut off such flow at that point, so that subsequent application of pressure to the hydraulic fluid in the said region effects a movement of the hydraulic piston (22) under the full operating force of the arrangement (10,22).
EP88302930A 1987-04-03 1988-03-31 A ram for a press Withdrawn EP0285435A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8707967 1987-04-03
GB878707967A GB8707967D0 (en) 1987-04-03 1987-04-03 Ram for press

Publications (2)

Publication Number Publication Date
EP0285435A2 EP0285435A2 (en) 1988-10-05
EP0285435A3 true EP0285435A3 (en) 1989-08-09

Family

ID=10615162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88302930A Withdrawn EP0285435A3 (en) 1987-04-03 1988-03-31 A ram for a press

Country Status (2)

Country Link
EP (1) EP0285435A3 (en)
GB (1) GB8707967D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113385922A (en) * 2021-06-30 2021-09-14 天长市天力液压机械有限责任公司 Automatic rubber roller sleeving machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE802606C (en) * 1949-10-15 1951-02-15 Karl Geisel Piston gear with rapid stroke and high pressure force at the end of the stroke
FR995204A (en) * 1949-09-12 1951-11-29 Asea Ab Clamping device
DE1917116A1 (en) * 1968-04-08 1969-10-23 Cie Des Ateliers Et Forges De Straight pressure cylinder with free piston
DE1919095A1 (en) * 1969-04-15 1970-11-05 Gabriel Guenther Pressing and punching device
WO1979000986A1 (en) * 1978-04-26 1979-11-29 Rapp Eugen Pressure raising hydropneumatic control device
DE3130931A1 (en) * 1981-08-05 1983-02-17 Aviatest GmbH, 4000 Düsseldorf Press drive, especially for hydraulically operated coating presses

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR995204A (en) * 1949-09-12 1951-11-29 Asea Ab Clamping device
DE802606C (en) * 1949-10-15 1951-02-15 Karl Geisel Piston gear with rapid stroke and high pressure force at the end of the stroke
DE1917116A1 (en) * 1968-04-08 1969-10-23 Cie Des Ateliers Et Forges De Straight pressure cylinder with free piston
DE1919095A1 (en) * 1969-04-15 1970-11-05 Gabriel Guenther Pressing and punching device
WO1979000986A1 (en) * 1978-04-26 1979-11-29 Rapp Eugen Pressure raising hydropneumatic control device
DE3130931A1 (en) * 1981-08-05 1983-02-17 Aviatest GmbH, 4000 Düsseldorf Press drive, especially for hydraulically operated coating presses

Also Published As

Publication number Publication date
EP0285435A2 (en) 1988-10-05
GB8707967D0 (en) 1987-05-07

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