EP1287977A3 - Process and apparatus for minimizing the spread of maximum pressing forces in a powder press - Google Patents

Process and apparatus for minimizing the spread of maximum pressing forces in a powder press Download PDF

Info

Publication number
EP1287977A3
EP1287977A3 EP02017261A EP02017261A EP1287977A3 EP 1287977 A3 EP1287977 A3 EP 1287977A3 EP 02017261 A EP02017261 A EP 02017261A EP 02017261 A EP02017261 A EP 02017261A EP 1287977 A3 EP1287977 A3 EP 1287977A3
Authority
EP
European Patent Office
Prior art keywords
maximum pressing
minimizing
powder press
pressing forces
spread
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
Application number
EP02017261A
Other languages
German (de)
French (fr)
Other versions
EP1287977B1 (en
EP1287977A2 (en
Inventor
Jürgen Hinzpeter
Ulrich Zeuschner
Ingo Schmidt
Thomas Pannewitz
Udo Baltruschat
Thorsten Ehrich
Ulf Hauschild
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.)
Fette GmbH
Original Assignee
Fette GmbH
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 Fette GmbH filed Critical Fette GmbH
Publication of EP1287977A2 publication Critical patent/EP1287977A2/en
Publication of EP1287977A3 publication Critical patent/EP1287977A3/en
Application granted granted Critical
Publication of EP1287977B1 publication Critical patent/EP1287977B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/004—Filling molds with powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/022—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space whereby the material is subjected to vibrations
    • 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
    • B30B15/22—Control arrangements for fluid-driven presses controlling the degree of pressure applied by the ram during the pressing stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Control Of Presses (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Process for minimizing the scattering of maximum pressing forces during pressing of a metal powder using a powder press comprises: (a) acquiring the distribution of the maximum pressing force values in intervals; (b) comparing the standard deviation for the maximum pressing forces with a prescribed value; and (c) changing the vibration parameter, filling time and course of the filling device according to a prescribed program until the standard deviation reaches a prescribed value and/or a minimum. An Independent claim is also included for a device for controlling the powder press.
EP02017261A 2001-08-31 2002-08-01 Process and apparatus for minimizing the spread of maximum pressing forces in a powder press Expired - Lifetime EP1287977B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10142623A DE10142623C2 (en) 2001-08-31 2001-08-31 Method and device for minimizing the spread of the maximum pressing forces in a powder press
DE10142623 2001-08-31

Publications (3)

Publication Number Publication Date
EP1287977A2 EP1287977A2 (en) 2003-03-05
EP1287977A3 true EP1287977A3 (en) 2004-01-28
EP1287977B1 EP1287977B1 (en) 2008-03-12

Family

ID=7697203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02017261A Expired - Lifetime EP1287977B1 (en) 2001-08-31 2002-08-01 Process and apparatus for minimizing the spread of maximum pressing forces in a powder press

Country Status (5)

Country Link
US (1) US7147820B2 (en)
EP (1) EP1287977B1 (en)
AT (1) ATE388809T1 (en)
DE (2) DE10142623C2 (en)
ES (1) ES2304236T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1964664B1 (en) * 2007-02-27 2013-11-20 Maschinenfabrik Lauffer GmbH & Co. KG Method for controlling a powder moulding press manufacturing moulded articles
JP6281482B2 (en) * 2013-12-24 2018-02-21 信越化学工業株式会社 Manufacturing method and forming apparatus of rare earth sintered magnet
JP6402615B2 (en) * 2013-12-24 2018-10-10 信越化学工業株式会社 Manufacturing method and forming apparatus of rare earth sintered magnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100598A (en) * 1975-09-05 1978-07-11 Hoffmann-La Roche Inc. Tablet press related instrumentation for use in development and control of formulations of pharmaceutical granulations
US4238431A (en) * 1977-09-22 1980-12-09 Wilhelm Fette Gmbh Method for the production of tablets and a tablet press
DE19903417A1 (en) * 1999-01-29 2000-08-10 Fette Wilhelm Gmbh Powder filling process, for a hydraulic press used to produce pressed metal powder parts, comprises moving a reciprocating filling shoe in different directions above a die opening during filling

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549642A (en) * 1945-08-24 1951-04-17 Gen Bronze Corp Press with vibrating die for forming powder metal blanks
US3593366A (en) * 1968-12-11 1971-07-20 Wolverine Pentronix Multiple punch tool set for powder compacting press
US3640654A (en) * 1970-06-25 1972-02-08 Wolverine Pentronix Die and punch assembly for compacting powder and method of assembly
US4041123A (en) * 1971-04-20 1977-08-09 Westinghouse Electric Corporation Method of compacting shaped powdered objects
US3730659A (en) * 1971-10-04 1973-05-01 Wolverine Pentronix Powder dispenser for a powder compacting press
US3788787A (en) * 1971-11-26 1974-01-29 H Silbereisen Hydraulic metal powder press
US4008023A (en) * 1972-03-27 1977-02-15 United Technologies Corporation Mold pack for making metal powder articles
BG18244A1 (en) * 1973-04-25 1974-10-25
US3890413A (en) * 1974-08-15 1975-06-17 Hydramet American Inc Apparatus and method for compacting particulate materials
FR2302287A1 (en) * 1975-02-27 1976-09-24 Commissariat Energie Atomique LOAD SINTERING PROCESS AND APPARATUS
US4260346A (en) * 1979-10-09 1981-04-07 Anderson Jr Raymond B Press assembly for powder material
US4583966A (en) * 1982-10-13 1986-04-22 Beloit Corporation Method of filling calender/embosser rolls using vibrations
DE3639918A1 (en) * 1986-03-26 1987-10-08 Thomas Eng Inc Device for controlling and monitoring a rotary tabletting press
JPH0780069B2 (en) * 1986-11-25 1995-08-30 敏彦 朝見 Vibration press molding machine
US4946634A (en) * 1987-04-16 1990-08-07 Gte Products Corporation Powder compacting press to control green density distribution in parts
DE3919821C2 (en) * 1989-06-15 1994-04-07 Mannesmann Ag Method and device for producing dimensionally stable compacts
US5672363A (en) * 1990-11-30 1997-09-30 Intermetallics Co., Ltd. Production apparatus for making green compact
US5211964A (en) * 1991-05-20 1993-05-18 Westinghouse Electric Corp. Press machine with means to adjust punching force
DE19717217C2 (en) * 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Method and device for producing compacts from hard metal, ceramic, sintered metal or the like
US6432158B1 (en) * 1999-10-25 2002-08-13 Sumitomo Special Metals Co., Ltd. Method and apparatus for producing compact of rare earth alloy powder and rare earth magnet
DE19955196A1 (en) * 1999-11-16 2001-05-23 Korsch Pressen Ag Method to maintain breaking resistance of e.g. washing powder tablets etc. with constant automatic adaptation of dosing resp. compacting rollers to compensate for charging variations
KR20010086905A (en) * 2000-03-04 2001-09-15 김영정 Biaxial press molding system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100598A (en) * 1975-09-05 1978-07-11 Hoffmann-La Roche Inc. Tablet press related instrumentation for use in development and control of formulations of pharmaceutical granulations
US4238431A (en) * 1977-09-22 1980-12-09 Wilhelm Fette Gmbh Method for the production of tablets and a tablet press
DE19903417A1 (en) * 1999-01-29 2000-08-10 Fette Wilhelm Gmbh Powder filling process, for a hydraulic press used to produce pressed metal powder parts, comprises moving a reciprocating filling shoe in different directions above a die opening during filling

Also Published As

Publication number Publication date
DE10142623C2 (en) 2003-11-06
DE10142623A1 (en) 2003-04-03
DE50211876D1 (en) 2008-04-24
ATE388809T1 (en) 2008-03-15
US20030047089A1 (en) 2003-03-13
ES2304236T3 (en) 2008-10-01
US7147820B2 (en) 2006-12-12
EP1287977B1 (en) 2008-03-12
EP1287977A2 (en) 2003-03-05

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