EP0224096B1 - Presse pour fabriquer des objets formés à partir de matières pulvérulentes ou en forme de granulés - Google Patents

Presse pour fabriquer des objets formés à partir de matières pulvérulentes ou en forme de granulés Download PDF

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Publication number
EP0224096B1
EP0224096B1 EP86115477A EP86115477A EP0224096B1 EP 0224096 B1 EP0224096 B1 EP 0224096B1 EP 86115477 A EP86115477 A EP 86115477A EP 86115477 A EP86115477 A EP 86115477A EP 0224096 B1 EP0224096 B1 EP 0224096B1
Authority
EP
European Patent Office
Prior art keywords
linkage
cylinder
piston
press
auxiliary drive
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.)
Expired - Lifetime
Application number
EP86115477A
Other languages
German (de)
English (en)
Other versions
EP0224096A3 (en
EP0224096A2 (fr
Inventor
Klaus Eugen Hanft
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.)
Erich Netzsch GmbH and Co Holding KG
Original Assignee
Erich Netzsch GmbH and Co Holding 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
Application filed by Erich Netzsch GmbH and Co Holding KG filed Critical Erich Netzsch GmbH and Co Holding KG
Priority to AT86115477T priority Critical patent/ATE68409T1/de
Publication of EP0224096A2 publication Critical patent/EP0224096A2/fr
Publication of EP0224096A3 publication Critical patent/EP0224096A3/de
Application granted granted Critical
Publication of EP0224096B1 publication Critical patent/EP0224096B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B30B1/28—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks the cam, crank, or eccentric being disposed below the lower platen or table and operating to pull down the upper platen or slide
    • 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 mechanical main drive is a crank mechanism which acts via a toggle lever on a lower cross member, which together with two vertical tie rods and an upper cross member is a frame-like Main linkage forms.
  • the trigger linkage is adjustably connected in the direction of the main press axis to an abutment slide on which two abutments are formed.
  • Each of these abutments is one Assigned pressure piece which is pivotally mounted on the lower cross member of the main linkage.
  • the two thrust pieces hit the two abutments and take the abutment slide with him down the pulling linkage until they each hit a height-adjustable deflection curve and are thereby pivoted into an ineffective position.
  • a granular material contained in the die is compressed by a stationary lower punch which penetrates into the die from below; After the pressure pieces have been swung out, the material is redensified by the upper punch, which penetrates deeper into the die, while it remains stationary together with the lower punch.
  • the second auxiliary drive of the known press works purely mechanically; it includes a pull-off curve and a return stroke curve, both of which are attached to a shaft belonging to the main drive and each interact with a curve follower roller on an arc slide.
  • the arc slides are each attached to a lever in a circular arc guide; of these two levers, one is responsible for the movements of the trigger linkage into its lower end position and the other for the return movements of the trigger linkage into the filling position.
  • the invention is therefore based on the object of developing a press of the type described in such a way that the construction costs for the auxiliary drives are reduced while maintaining the advantages of the mechanical main drive.
  • At least one of the auxiliary drives has a fluid-operated piston-cylinder unit with at least one cylinder part adjustable in the direction of the main press axis, which limits the stroke of the associated piston and the cylinder space adjoining it.
  • auxiliary drives can be assigned to the mechanical main drive, which consist of a few components and are not susceptible to wear.
  • the or each adjustable cylinder part has a thread which is part of a remotely operable adjusting gear.
  • the first auxiliary drive has an annular cylinder which as a whole is axial with respect to the crossbar is adjustable and encloses an annular piston which can be displaced under fluid pressure into a position protruding from the cylinder, and in that the trigger linkage has a trigger rod which extends through the annular piston and has an engagement surface for it.
  • a counter-piston of larger effective area is arranged axially opposite the piston of the first auxiliary drive, which piston forms a stop for the trigger rod which determines the pressing position of the second pressing tool part.
  • the second auxiliary drive can be designed in such a way that it has a double-acting cylinder fixed on the main axis of the press with two axially adjustable cylinder heads, which determine the end position or the filling position of the second pressing tool part, and the trigger linkage carries a piston which, in the double-acting cylinder, between the two cylinder heads works.
  • the piston of the second auxiliary drive has a larger effective area on the side that is pressurized for the movement into the filling position than on its opposite side.
  • the press shown has a housing 10 with a pair of attached stands 12, in which a pair of tie rods 14 are arranged parallel and symmetrically to a vertical main axis A of the press and guided vertically displaceably.
  • the tie rods 14 are connected within the housing 10 by a lower cross member 16 and above the stand 12 by an upper cross member 18 and together with these cross members form a main linkage 20 in the form of a rectangular frame.
  • An upper cylinder 22 is supported on the upper crossmember 18 and bears an upper punch 24 projecting vertically downwards and adjustable along the main axis A of the press.
  • a stationary press table 26 is arranged between the two stands 12 and bears a lower punch 28 which projects vertically upwards along the main axis A of the press.
  • the trigger linkage 30 includes a trigger rod 32, which is arranged essentially within the housing 10, a coupling piece 34, which connects the trigger rod 32 to a horizontal yoke 36 arranged below the press table 26, a pair of vertical guide rods 38, which also hold the yoke 36 together an adapter 40, and a pair of upwardly projecting upper guide rods 42, on which an upper yoke 44 carrying the upper punch 24 is guided.
  • a die 46 is exchangeably attached to the adapter 40.
  • a motor (not shown), which belongs to a main drive 50, is arranged in a motor housing 48 which is mounted laterally on the housing 10.
  • the main drive 50 also includes a crankshaft 52 with a pair of eccentric disks 54, which are each connected to a bearing journal 58 on the lower cross member 16 by a connecting rod 56 mounted on them.
  • a roller 60 is mounted, each running on a vertical guide 62 on the housing 10.
  • the crankshaft 52 can be driven continuously or intermittently by one full revolution and thereby sets the main linkage 20 in sinusoidally accelerated and decelerated upward and downward movements.
  • the trigger rod 32 extends through the lower cross member 16 and is carried along by it at least in part during its downward movement, the upper punch 24 and die 46 moving downward together and powder or granular material previously filled into the die 46 being compressed by the lower punch 28 until the die 46 has reached the end position of its working stroke, the so-called press position.
  • the trigger linkage 30 is assigned a first auxiliary drive 64 which can be adjusted so that the trigger linkage together with the die 46 leads the main linkage 20 together with the upper punch 24, the die 46 thus reaches its pressing position when the upper punch 24 still has a rest of its downward stroke in front of it and executes a relative movement with respect to lower punch 28 and die 46 during this remaining downward stroke in order to compact the powdery or granular material inside die 46 from above.
  • the first auxiliary drive 64 includes a hydraulic cylinder 66, 68, which is arranged so as to be vertically adjustable coaxially with the trigger rod 32 in the lower crossmember 16, and consists of an outer cylinder jacket 66 which is guided in the lower crossmember so as to be non-rotatable and also screwed to it, in the opposite direction Twist secured inner cylinder liner 68 exists.
  • the inner cylinder liner 68 is connected by a pair of movement threads to a nut 70, which is designed as a chain wheel on the outside and is held axially immovable but rotatable by a holder 72 in the lower cross member 60.
  • the nut 70 can be remotely operated from an actuator on the front of the housing 10 via a chain drive or other transmission.
  • a line 74 for hydraulic fluid under pressure opens into the upper region of the cylinder 66, 68 and can be used to urge an annular piston 76 into its lower end position shown.
  • the cylinder 66, 68 can be adjusted by turning the nut 70 between the two limit positions shown in FIGS. 4 and 5.
  • the annular piston 76 presses on the downward stroke of the main linkage 20 against an annular contact surface 78 on the trigger rod 32 and thereby allows the trigger linkage 30 together with the die 46 to advance the main linkage 20 including the upper punch 24 by the greatest possible amount s.
  • the further the cylinder 66, 68 is adjusted upwards by means of the nut 70, the smaller the amount s; 5 results in s 0.
  • a counter-piston 80 in a further hydraulic cylinder 82 is assigned in the lower part of the housing 10, which can be pressurized by a fluid line 84 opening under the counter-piston 80.
  • the counter-piston 80 forms a stop for the lower end face of the trigger rod 32 and ensures that the trigger rod 30 together with the die 46 remains in their pressed position.
  • a second auxiliary drive 86 is also assigned to the trigger linkage 30.
  • the trigger rod 32 has a smaller diameter below the piston 88 than above it; accordingly, the piston 88 has a larger effective area on its underside than on its top.
  • the piston 88 works in a stepless cylinder 90, which is arranged coaxially with the trigger rod 32 in the housing 10 and is closed at both ends by a cylinder head 92 and 94, respectively.
  • the two cylinder heads 92 and 94 each have an internal thread, with which they are screwed onto an external thread on the cylinder 90, and also have external teeth, by means of which they can be rotated independently of one another via a remotely operable gear, for example from the front of the housing 10 are.
  • a fluid line 96 or 98 formed in the trigger rod 32 opens. If only the fluid line 96 is under pressure while the fluid line 84 is depressurized , the trigger rod 32 is pressed from the pressing position shown in FIG. 6 into its lower end position according to FIG. 8, the die 46 being pulled off the pressed molding so that it can be removed. If the fluid line 98 is then also pressurized, the pulling rod 30 together with the die 46 is moved into its upper end position according to FIG. 7, which forms a filling position for filling the die 46 with new material to be pressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Powder Metallurgy (AREA)
  • Glanulating (AREA)

Claims (7)

  1. Presse pour la fabrication d'objets formés à partir de matières pulvérulentes ou granulées, ladite presse comprenant
    - un système de barres principal (20) qui porte une première partie d'un moule à compression, spécialement un poinçon (24),
    - un dispositif mécanique d'entraînement principal (50) pour les courses de travail et de retour du système de barres principal (20) le long d'un axe principal (A) de la presse,
    - un système de barres de détachement (30) qui porte une seconde partie du moule à compression, spécialement une cavité (46),
    - un premier dispositif d'entraînement auxiliaire (64) pour des mouvements, dérivés de la course de travail du système de barres principal (20), du système de barres de détachement (30), mouvements destinés à déplacer la seconde partie du moule à compression en partant d'une position de chargement vers une position de compression, et
    - un second dispositif d'entraînement auxiliaire (86) pour des mouvements du système de barres de détachement (30) vers une position extrême et retour à la position de chargement, caractérisée en ce que, au moins, l'un des dispositifs d'entraînement auxiliaires (64; 86) comprend une unité piston/cylindre actionnée par fluide et ayant au moins une partie de cylindre (66, 68; 92, 94) qui est réglable dans la direction de l'axe principal (A) de la presse, ladite partie de cylindre limitant la course du piston associé (76; 88) et l'espace du cylindre y adjacent.
  2. Presse selon la revendication 1,
    caractérisée en ce qu'un filet est réalisé sur la partie ou les parties de cylindre réglable(s) (66, 68; 92, 94), ledit filet faisant partie d'un mécanisme de réglage à distance.
  3. Presse selon la revendication 1 ou 2, dans laquelle le système de barres principal (20) comprend une traverse (16) sur laquelle est disposé le premier dispositif d'entraînement auxiliaire (64),
    caractérisée en ce que le premier dispositif d'entraînement auxiliaire (64) comporte un cylindre annulaire (66, 68) qui est réglable, comme unité, dans la direction axiale par rapport à la traverse (16) et renferme un piston annulaire (76) pouvant être déplacé, par glissement, sous pression de fluide, vers une position dans laquelle il fait saillie par rapport au cylindre (66, 68), et en ce que le système de barres de détachement (30) comporte une barre de détachement (32) qui pénètre le piston annulaire (76) et comprend une surface d'attaque (78) pour ledit piston.
  4. Presse selon la revendication 3,
    caractérisée en ce que, dans une position axialement opposée au piston (76) du premier dispositif d'entraînement auxiliaire (64), un contre-piston (80) d'une surface utile plus grande est disposé, ledit piston constituant une butée pour la barre de détachement (32) qui définit la position de compression de la seconde partie du moule à compression (cavité 46).
  5. Presse selon la revendication 1 ou 2,
    caracterisée en ce que le second dispositif d'entraînement auxiliaire (86) comprend un cylindre à double effet (90), monté d'une façon stationnaire sur l'axe principal (A) de la presse et ayant deux têtes de cylindre (92, 94) à réglage axial qui définissent, respectivement, la position extrême et la position de chargement de la seconde partie du moule à compression (cavité 46), et en ce que le système de barres de détachement (30) porte un piston (88) qui fonctionne dans le cylindre à double effet (90), entre les deux têtes de cylindre (92, 94).
  6. Presse selon la revendication 5,
    caractérisée en ce que le piston (88) du second dispositif d'entralnement auxiliaire (86) comporte sur le côté auquel la pression sera admise pour le déplacement vers la position de chargement, une surface utile plus grande que sur son côté opposé.
  7. Presse selon la revendication 5 ou 6, en combinaison avec la revendication 4,
    caractérisée en ce que les pistons (76, 88) des deux dispositifs d'entraînement auxiliaires (64, 86) et le contre-piston (80) sont disposés sur l'axe principal (A) de la presse.
EP86115477A 1985-11-22 1986-11-07 Presse pour fabriquer des objets formés à partir de matières pulvérulentes ou en forme de granulés Expired - Lifetime EP0224096B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115477T ATE68409T1 (de) 1985-11-22 1986-11-07 Presse zum herstellen von formlingen aus pulver- oder granulatfoermigen werkstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541387 1985-11-22
DE19853541387 DE3541387A1 (de) 1985-11-22 1985-11-22 Presse zum herstellen von formlingen aus pulver- oder granulatfoermigen werkstoffen

Publications (3)

Publication Number Publication Date
EP0224096A2 EP0224096A2 (fr) 1987-06-03
EP0224096A3 EP0224096A3 (en) 1988-11-30
EP0224096B1 true EP0224096B1 (fr) 1991-10-16

Family

ID=6286604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115477A Expired - Lifetime EP0224096B1 (fr) 1985-11-22 1986-11-07 Presse pour fabriquer des objets formés à partir de matières pulvérulentes ou en forme de granulés

Country Status (3)

Country Link
EP (1) EP0224096B1 (fr)
AT (1) ATE68409T1 (fr)
DE (2) DE3541387A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3764089D1 (de) * 1987-05-07 1990-09-06 Graebener Theodor Pressensyst Presse, insbesondere zum herstellen masshaltiger presslinge aus pulverfoermigen werkstoffen, und verfahren zum betrieb einer solchen presse.
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
DE4114880A1 (de) * 1990-05-09 1991-11-14 Komage Gellner & Co Maschinenf Presse zum verpressen pulverfoermiger massen
DE4127655A1 (de) * 1991-08-21 1993-02-25 Manfred Pscherer Presse fuer pulverfoermige und aehnliche werkstoffe
GB9206526D0 (en) * 1992-03-25 1992-05-06 Komage Gellner & Co Press apparatus
DE4304872A1 (de) * 1993-02-18 1994-09-01 Manfred Pscherer Presse für pulverförmige und ähnliche Werkstoffe
DE502004005039D1 (de) 2004-11-17 2007-10-31 Bruderer Ag Mehrstufenpresse
ATE523326T1 (de) * 2005-06-22 2011-09-15 Roland-Marcel Zumstein Vorrichtung zum stanzen und/oder umformen von blechen drähten und dergleichem
DE102011100618A1 (de) 2010-12-30 2012-07-05 Sms Meer Gmbh Pulverpresse oder Pulverpressenadapter sowie Verfahren zum Betrieb einer Pulverpresse
DE102012013227B4 (de) * 2012-07-04 2014-12-31 Sms Meer Gmbh Pulverpresse
DE102012013229B4 (de) 2012-07-04 2014-10-09 Sms Meer Gmbh Pulverpresse

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587577A (en) * 1943-04-02 1947-04-30 Leslie Stewart Hubbert Briquetting press
DE925748C (de) * 1944-11-24 1955-03-28 Mueller Fritz Fa Einrichtung zum Pressen von Pulvern, vorzugsweise von Metallpulvern
US2831212A (en) * 1954-07-29 1958-04-22 Byron B Belden Pre-pressing die control apparatus
US2825092A (en) * 1954-11-17 1958-03-04 Bliss E W Co Briquetting press
US2918040A (en) * 1954-12-15 1959-12-22 Mead Specialties Company Power cylinder assembly
DE1088811B (de) * 1955-01-21 1960-09-08 Komage Gellner & Co Maschinenf Vorrichtung zum Steuern der Pressmatrize bei Pressen
DE1920969B2 (de) * 1969-04-24 1975-04-30 Mannesmann Pulvermetall Gmbh, 4050 Moenchengladbach Hubbegrenzung in einer hydraulischen Metallpulverpresse
DE2424802C3 (de) * 1974-05-22 1978-08-31 Gebr. Netzsch, Maschinenfabrik Gmbh & Co, 8672 Selb Presse zum Herstellen von Formungen aus pulverförmigen oder körnigen Werkstoffen
DE2424803B2 (de) * 1974-05-22 1978-05-11 Gebrueder Netzsch Maschinenfabrik Gmbh & Co, 8672 Selb Presse zum Herstellen von Formungen aus pulverförmiger! oder körnigen Werkstoffen
US4260346A (en) * 1979-10-09 1981-04-07 Anderson Jr Raymond B Press assembly for powder material
DE3142126A1 (de) * 1981-10-23 1983-05-11 Dorst-Keramikmaschinen-Bau Otto Dorst U. Dipl.-Ing. Walter Schlegel, 8113 Kochel "presse zum herstellen masshaltiger presslinge aus pulverfoermigem material"

Also Published As

Publication number Publication date
EP0224096A3 (en) 1988-11-30
ATE68409T1 (de) 1991-11-15
DE3682029D1 (de) 1991-11-21
EP0224096A2 (fr) 1987-06-03
DE3541387A1 (de) 1987-05-27

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