EP0077897A2 - Presse pour fabriquer des articles pressés gardant la mesure à partir de matière pulvérulente - Google Patents

Presse pour fabriquer des articles pressés gardant la mesure à partir de matière pulvérulente Download PDF

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Publication number
EP0077897A2
EP0077897A2 EP82107540A EP82107540A EP0077897A2 EP 0077897 A2 EP0077897 A2 EP 0077897A2 EP 82107540 A EP82107540 A EP 82107540A EP 82107540 A EP82107540 A EP 82107540A EP 0077897 A2 EP0077897 A2 EP 0077897A2
Authority
EP
European Patent Office
Prior art keywords
plate
press
die
base plate
bear
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
EP82107540A
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German (de)
English (en)
Other versions
EP0077897B1 (fr
EP0077897A3 (en
EP0077897B2 (fr
Inventor
Hubert Dipl.-Ing. Schaidl
Dietmar Herren
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.)
DORST Technologies GmbH and Co KG
Original Assignee
DORST Technologies GmbH and Co KG
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
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Application filed by DORST Technologies GmbH and Co KG filed Critical DORST Technologies GmbH and Co KG
Publication of EP0077897A2 publication Critical patent/EP0077897A2/fr
Publication of EP0077897A3 publication Critical patent/EP0077897A3/de
Publication of EP0077897B1 publication Critical patent/EP0077897B1/fr
Application granted granted Critical
Publication of EP0077897B2 publication Critical patent/EP0077897B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a press having an upper bear and a lower bear for producing dimensionally stable compacts from powdery material.
  • Such compacts are to be understood, for example, as gears, shock absorber pistons, synchronous parts for automatic transmissions or the like. They generally consist of iron powder, ferrite powder or ceramic or similar powders.
  • An obviously used press of this type originating from the house of the applicant has a base plate, a die plate and a lower stamp which can be moved hydraulically relative to the base plate and the die plate.
  • the base plate and die plate are parts of a die plate and a lower coupling plate Drawbar connected framework, which is connected to the upper bear via a connecting piece which can be displaced in the pressing direction relative to the framework, while the lower bear of the press is connected to the lower coupling plate.
  • the base plate receives the lower stamp in a correspondingly stepped form, possibly also composed of different stamp parts.
  • the lower punch even if it is composed of several punch parts, different forces inevitably occur within the compact, which are due to the frictional forces between the corresponding die or stamp part and the compact to be removed and very often lead to the fact that the Compact is destroyed.
  • the task of such a press is to further develop it in such a way that the prerequisites are created for the density distribution in the pressed part to be as uniform as possible during pressing and for this purpose the press can be controlled using the latest electronic control devices. Furthermore, there should be the possibility during removal from the mold that the different compression of the same can be compensated by corresponding movement control by readjusting the press rams.
  • the pressing position forms a lowermost fixed stop for all lower punches, which can be adjusted to a certain extent with respect to the individual lower punches, but also basically defines the pressing position even after such an adjustment.
  • the compact is ejected in the simplest manner by first pulling off the die, whereupon the compact, with the support of all the lower punches, is released from the die. Then, with the next lower punch in the end position at the level of the die, the rest of the lower punches are raised together until the next step of the compact has been released. This gradual start-up continues until finally the compact is only seated on a central lower punch from which it can be ejected.
  • the sequence of this work process depends exclusively on the shape of the compact. In any case, however, it is ensured that there are only frictional forces on the compact during ejection of the next stage within this stage, so that a gradual relief of the compact takes place in the circumferential direction and thus excessive pulling forces are avoided, which can lead to structural changes in the compact.
  • the compact can be easily detached from an existing central mandrel because it progressively expands due to its progressive relaxation and can therefore be easily removed.
  • a particular advantage of the invention is that each machine part carrying a lower punch is one on the Base plate fixed measuring element can be assigned, which serves as a path scanner for the path of these machine parts in the filling or ejection position.
  • the center pin is advantageously attached to the piston of a hydraulic cylinder which is coupled to the lower clutch plate.
  • the press according to the invention it is possible to move the speed of the individual machine parts carrying the lower punches completely independently of one another from the start of the pressing process. In addition, they can be moved into their final pressing position depending on the pressure building up between the upper punch and the individual lower punches in the material to be pressed.
  • the control can be carried out with the most modern aids, for example with the aid of control electronics.
  • the number of different machine parts, each with a lower punch, is arbitrary and only depends on the possibility of accommodating them in the press frame.
  • FIG. 4 the representation of the intermediate plate and the base plate has been rotated by 90 ° in order to make otherwise invisible parts visible.
  • the lower coupling plate 1 is coupled via a connector 2 with a T-piece 3, which is part of the machine frame.
  • the lower coupling plate 1 is firmly connected to a die holding plate 5 via the tie rods 4.
  • the connector 6 is inserted on the movable part, ie on the upper punch of the press and with the upper one Coupling plate 7 connected so that it is connected in this way to the upper punch of the press.
  • the upper coupling plate 7 is slidably guided in the die holding plate 5 via guide rods 8.
  • the guide rods penetrate the mounting plate 9 through openings which are kept correspondingly large.
  • the receiving plate 9 receives one or more stamps. 4 to 6, the stamp 10 is fastened to the mounting plate 9 via a bridge 11 with the aid of a retaining ring 12. 3, piston rods 13 are fastened to the mounting plate 9, the pistons 14 of which can be displaced in the hydraulic cylinder 15 in the base plate 16.
  • a further punch 22 sits on an intermediate plate 20 over a bridge 21 similar to bridge 11, which is also fastened to bridge 21 with the aid of a retaining ring 23.
  • the piston 26 is fixed in the intermediate plate 20.
  • the rotatable cap 29 thus, like the rotatable cap 19, enables the end position of the press to be changed.
  • a further piston 30 is arranged in the base plate 16 and is displaceable in a cylinder 31.
  • This piston 30 is designed as a hollow piston and has a central opening 32 through which an element to be explained later will be passed.
  • On the base plate 16 there is a further guide element 33 with a thread 34, on which a rotatable cap 35 with an internal thread is arranged, which serves for changing the press end position of the piston 30, which is displaceable in the cylinder 31.
  • the stop takes place with the aid of a receiving plate 36 which is fixedly arranged on the piston rod 37 of the piston 30.
  • an extension piece 39 is seated on the receiving plate 36, on which a further punch 41 is fixed with the aid of a retaining ring 40.
  • the stamp 41 is the innermost stamp.
  • the three-part stamp arrangement in the exemplary embodiment can be extended or reduced, while maintaining this principle, into a stamp arrangement with more or less than three stamps, or can be selected so that the gradation on the molded body 42 (FIG. 6), which is obtained from the filled-in molding compound 43 ( Fig. 4) is produced, vice versa, ie runs from the inside out. Any other structure, insofar as it can be reached with stamps, can be realized according to this principle.
  • a central pin 44 is fastened directly or with the aid of a collar 45 (FIGS. 4 to 6). Then it moves with the coupling plate 1. The center pin 44 continues upwards until it is flush with the die holding plate 5.
  • the central pin 44 can, however, also pass freely through the opening 47 in the lower coupling plate 1 and be coupled to a piston 48 which can be actuated in a hydraulic cylinder 49 which is arranged in the T-piece 3. This means that it can be moved independently of the movement of the die holding plate 5.
  • a scale 52 is provided for the piston 30 in the cylinder 31, which slides in a bore 53 in the base plate 16.
  • the scale 52 is firmly attached to the piston 30 and thus follows its movement.
  • the scale 52 allows any measurement of the path of the associated piston 30 relative to the base plate 16, so that it is possible to electronically evaluate the determined value and to supply it to a corresponding control device.
  • the scale With each path length unit, for example 1 / 100th of a millimeter, the scale triggers a pulse in the electronic control, the machine being controlled for the next locomotion after a certain pulse quantity has been reached.
  • this next movement consists in the relative movement between the base plate 16 and the intermediate plate 20 and is tracked with the aid of the measuring rod 54, which dips into the bore 55 in the intermediate plate 20.
  • the center pin 44 is coupled to the piston 48, it can also be brought into any desired position relative to the die holding plate 5 by means of a scale (not shown) and this at a preselected speed. It can be used to influence the powder flow regardless of temperature changes and friction conditions. This solves the problem that results from the fact that the punches 10, 22 and 41 and the central pin 44 heat up in the course of the sequence of the pressing processes and the frictional relationships between the molded body and them change during the compression process and thus to an uncontrollable powder flow with resulting changes in density in the pressed molded body. This can now be done by a regulated movement the stamp and the center pin from the filling to the pressing position can be successfully counteracted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Powder Metallurgy (AREA)
EP82107540A 1981-10-23 1982-08-18 Presse pour fabriquer des articles pressés gardant la mesure à partir de matière pulvérulente Expired - Lifetime EP0077897B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813142126 DE3142126A1 (de) 1981-10-23 1981-10-23 "presse zum herstellen masshaltiger presslinge aus pulverfoermigem material"
DE3142126 1981-10-23

Publications (4)

Publication Number Publication Date
EP0077897A2 true EP0077897A2 (fr) 1983-05-04
EP0077897A3 EP0077897A3 (en) 1984-11-28
EP0077897B1 EP0077897B1 (fr) 1987-04-15
EP0077897B2 EP0077897B2 (fr) 1993-08-25

Family

ID=6144719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107540A Expired - Lifetime EP0077897B2 (fr) 1981-10-23 1982-08-18 Presse pour fabriquer des articles pressés gardant la mesure à partir de matière pulvérulente

Country Status (3)

Country Link
US (1) US4482307A (fr)
EP (1) EP0077897B2 (fr)
DE (1) DE3142126A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260249A1 (fr) * 1986-09-11 1988-03-16 Simmering-Graz-Pauker Aktiengesellschaft Récipient à haute pression avec un pilon
EP0224096A3 (en) * 1985-11-22 1988-11-30 Erich Netzsch Gmbh & Co. Holding Kg Press for making formed objects from powdery or granulated materials
EP0300983A1 (fr) * 1987-07-24 1989-01-25 Ugo Giannelli Dispositif pour le pressage et le démoulage de produits compressés en ciment
EP0399373A1 (fr) * 1989-05-23 1990-11-28 Anton Heggenstaller AG Procédé et dispositif de pressage d'un corps rigide de particules végétales en forme de poutre
EP0561159A1 (fr) * 1992-03-17 1993-09-22 KOMAGE GELLNER MASCHINENFABRIK GmbH Dispositif pour la pressage de corps moulés à partir d'une matière à grains fins
EP0586028A1 (fr) * 1992-08-18 1994-03-09 MANNESMANN Aktiengesellschaft Presse pour fabriquer des articles pressés à dimensions exactes
EP0629496A1 (fr) * 1993-06-14 1994-12-21 Sumitomo Electric Industries, Ltd. Presse à jeu d'outils pour le compactage de poudre
CN111819072A (zh) * 2018-02-26 2020-10-23 奥斯瓦尔德股份公司 用于粉末压机的压制设备以及工具更换系统

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608852A (en) 1983-08-24 1986-09-02 Amada Company, Limited Press machine
ES2016945B3 (es) * 1987-05-07 1990-12-16 Theodor Grabener Pressensysteme Gmbh & Co Kg Prensa, especialmente para fabricacion de piezas prensadas con medida justa de sustancias pulverizadas y procedimiento para funcionamiento de tal prensa
EP0305566B1 (fr) * 1987-09-02 1991-03-20 Gräbener Pressensysteme GmbH & Co. KG Presse, notamment pour fabriquer des articles pressés gardant un format donné à partir de matières pulvérulentes
US5034448A (en) * 1987-09-17 1991-07-23 The Dow Chemical Company Slip composition for whiteware articles
US4915890A (en) * 1987-09-17 1990-04-10 The Dow Chemical Company Casting process
DE3829128A1 (de) * 1988-08-27 1990-03-08 Laeis Gmbh Verfahren zur herstellung von pressformteilen und vorrichtung zur durchfuehrung des verfahrens
DE3940192A1 (de) * 1989-02-02 1990-08-09 Gottfried Weber Hydraulische presse
DE3904617A1 (de) * 1989-02-16 1990-08-23 Didier Werke Ag Presse zum kaltformen von formmassen zu formkoerpern, insbesondere keramischen steinen
US5192560A (en) * 1989-03-07 1993-03-09 Canon Kabushiki Kaisha Variable mold apparatus
DE3909757A1 (de) * 1989-03-23 1990-09-27 Dorst Masch & Anlagen Presse mit einem in die presse einsetzbaren werkzeuggestell
DE3919821C2 (de) * 1989-06-15 1994-04-07 Mannesmann Ag Verfahren und Vorrichtung zum Herstellen von maßhaltigen Preßlingen
DE4000423C2 (de) * 1990-01-09 1998-10-08 Dorst Masch & Anlagen Presse zur Herstellung maßhaltiger Preßlinge aus pulverförmigem Material
JPH07115233B2 (ja) * 1990-08-10 1995-12-13 株式会社ヨシツカ精機 粉末成形プレス
EP0680405B1 (fr) * 1993-11-24 1999-08-04 Stackpole Limited Matrice double a mise en phase
DE69328262T2 (de) * 1993-11-24 2000-12-21 Stackpole Ltd., Mississauga Hinterschnittene mehrteilige pressform
AT402375B (de) * 1994-10-14 1997-04-25 Kranzinger Norbert Verfahren und vorrichtung zum herstellen von hohlbausteinen
US6440357B1 (en) 1996-05-09 2002-08-27 Stackpole Limited Compacted-powder opposed twin-helical gears and method
US6165400A (en) * 1996-05-09 2000-12-26 Stackpole Limited Compacted-powder opposed twin-helical gears and method
GB2360825B (en) * 2000-03-30 2004-11-17 Formflo Ltd Gear wheels roll formed from powder metal blanks
DE10135523C2 (de) 2001-07-20 2003-07-31 Dorst Masch & Anlagen Presseneinrichtung zum Herstellen maßhaltiger Presslinge aus pulverförmigen Metall
DE10151858A1 (de) * 2001-10-24 2003-05-08 Dorst Masch & Anlagen Verfahren zum Einstellen bzw. Überwachen eines Pressen-Werkzeugs und Pressen-Werkzeug bzw. Pressen-Steuereinrichtung dafür
AU2003210496A1 (en) * 2002-01-15 2003-07-30 Hawk Precision Components Group, Inc. Tool rig for the compaction of particulate material
DE10254656B4 (de) * 2002-11-22 2005-10-13 Dorst Technologies Gmbh & Co. Kg Presseneinrichtung zum Herstellen maßhaltiger Presslinge mit zentraler Stempelabstützung
DE10355963A1 (de) * 2002-12-02 2004-06-24 Mold-Masters Limited, Georgetown Hubbegrenzer für einen Nadelventilbetätigungsmechanismus
DE102005044759B4 (de) * 2005-09-20 2007-07-12 Sms Meer Gmbh Vorrichtung zum Herstellen eines Formteils
EP1849590B1 (fr) 2006-04-29 2013-05-15 Fette GmbH Presse
EP1849591B1 (fr) 2006-04-29 2016-02-03 Fette GmbH Presse
CN100410067C (zh) * 2006-07-14 2008-08-13 严培义 粉末成形机双上冲内冲调整机构
CN103072299B (zh) * 2012-12-25 2015-01-07 上海帮容环保科技有限公司 带有移动垫块的油压机

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556951A (en) * 1944-06-05 1951-06-12 Stokes Machine Co Powdered material compacting press
US2509783A (en) * 1945-10-17 1950-05-30 Hpm Dev Corp Apparatus for molding
DE976579C (de) * 1946-12-04 1963-12-05 Husqvarna Vapenfabriks Ab Presswerkzeug zum Herstellen von zu sinternden Presskoerpern aus Metallpulver
GB677234A (en) * 1947-10-20 1952-08-13 Haller John An improved machine for briquetting powdered metal
US3191232A (en) * 1961-12-07 1965-06-29 Haller John Hydraulic compacting press
US3172156A (en) * 1962-09-06 1965-03-09 Cincinnati Shaper Co Compacting press
US3337916A (en) * 1965-10-28 1967-08-29 Cincinnati Shaper Co Compacting press with selective ejection
SE338241B (fr) * 1967-03-22 1971-08-30 Asea Ab
GB1234164A (fr) * 1968-03-20 1971-06-03
US3647332A (en) * 1969-08-29 1972-03-07 Parker Hannifin Corp Hydraulic press
US3664784A (en) * 1970-01-19 1972-05-23 Pennwalt Corp Compacting press
US3868201A (en) * 1973-04-17 1975-02-25 Wickes Corp Powdered metal press
DE2519708C3 (de) * 1974-05-03 1980-04-10 Agence Nationale De Valorisation De La Recherche (Anvar), Neuilly-Sur-Seine, Hauts-De-Seine (Frankreich) Verfahren und Vorrichtung zum Herstellen von Kontaktlinsen
US4153399A (en) * 1977-09-08 1979-05-08 Ptx-Pentronix, Inc. Multiple punch tool set for powder compacting press
IT1107475B (it) * 1978-07-24 1985-11-25 Merisinter Spa Complesso di pressa e porta-stampo per la compattazione nella metallurgia delle polveri
DE2924704A1 (de) * 1979-06-19 1981-01-15 Dorst Keramikmasch Einrichtung zur festlegung der hoehe von pressteilen an einer presse, insbesondere zum pressen von pressteilen aus pulverfoermigem ausgangsmaterial
DE2925902A1 (de) * 1979-06-27 1981-01-15 Manfred Wanzke Signalvorrichtung zur erzeugung von elektrischen steuersignalen fuer eine steuervorrichtung einer presse
JPS599280B2 (ja) * 1980-09-09 1984-03-01 玉川機械株式会社 粉末成形プレスにおける浮動パンチ停止解放装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224096A3 (en) * 1985-11-22 1988-11-30 Erich Netzsch Gmbh & Co. Holding Kg Press for making formed objects from powdery or granulated materials
EP0260249A1 (fr) * 1986-09-11 1988-03-16 Simmering-Graz-Pauker Aktiengesellschaft Récipient à haute pression avec un pilon
EP0300983A1 (fr) * 1987-07-24 1989-01-25 Ugo Giannelli Dispositif pour le pressage et le démoulage de produits compressés en ciment
EP0399373A1 (fr) * 1989-05-23 1990-11-28 Anton Heggenstaller AG Procédé et dispositif de pressage d'un corps rigide de particules végétales en forme de poutre
EP0561159A1 (fr) * 1992-03-17 1993-09-22 KOMAGE GELLNER MASCHINENFABRIK GmbH Dispositif pour la pressage de corps moulés à partir d'une matière à grains fins
EP0586028A1 (fr) * 1992-08-18 1994-03-09 MANNESMANN Aktiengesellschaft Presse pour fabriquer des articles pressés à dimensions exactes
EP0629496A1 (fr) * 1993-06-14 1994-12-21 Sumitomo Electric Industries, Ltd. Presse à jeu d'outils pour le compactage de poudre
US5478225A (en) * 1993-06-14 1995-12-26 Sumitomo Electric Industries, Ltd. Tool set type powder compacting press
CN111819072A (zh) * 2018-02-26 2020-10-23 奥斯瓦尔德股份公司 用于粉末压机的压制设备以及工具更换系统

Also Published As

Publication number Publication date
EP0077897B1 (fr) 1987-04-15
US4482307A (en) 1984-11-13
EP0077897A3 (en) 1984-11-28
DE3142126A1 (de) 1983-05-11
EP0077897B2 (fr) 1993-08-25
DE3142126C2 (fr) 1988-01-14

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