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EP2441573B1 - Press and method for manufacturing a moulded part out of powder material - Google Patents

Press and method for manufacturing a moulded part out of powder material Download PDF

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Publication number
EP2441573B1
EP2441573B1 EP11183978.3A EP11183978A EP2441573B1 EP 2441573 B1 EP2441573 B1 EP 2441573B1 EP 11183978 A EP11183978 A EP 11183978A EP 2441573 B1 EP2441573 B1 EP 2441573B1
Authority
EP
European Patent Office
Prior art keywords
transverse
pressing direction
press
transfer device
force transfer
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.)
Not-in-force
Application number
EP11183978.3A
Other languages
German (de)
French (fr)
Other versions
EP2441573A2 (en
EP2441573A3 (en
Inventor
Martin Dupont
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.)
KOMAGE GELLNER MASCHF
Komage Gellner Maschinenfabrik KG
Original Assignee
KOMAGE GELLNER MASCHF
Komage Gellner Maschinenfabrik KG
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Publication date
Application filed by KOMAGE GELLNER MASCHF, Komage Gellner Maschinenfabrik KG filed Critical KOMAGE GELLNER MASCHF
Publication of EP2441573A2 publication Critical patent/EP2441573A2/en
Publication of EP2441573A3 publication Critical patent/EP2441573A3/en
Application granted granted Critical
Publication of EP2441573B1 publication Critical patent/EP2441573B1/en
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Classifications

    • 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
    • B30B11/007—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a plurality of pressing members working in different directions
    • 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
    • B30B1/40—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 wedge means
    • 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 for producing a molded article of powdery material, which has a press die with a recess for receiving the material, at least one main punch for pressing the material in a main pressing direction and at least two transverse punches, in a cross-direction transverse to the main pressing direction in the recess are movable and for which a drive is provided, comprising a power transmission device which is movably mounted in a direction transverse to the transverse pressing direction and with which a driving force to the transverse punch is transferable.
  • the invention further relates to a method for pressing a molded article of powdery material.
  • a press which comprises two movable in the main pressing direction stamp and a die, which has an undercut, in which in a circular shape adjacent to each other and against each other slidably a plurality of transverse punches are arranged.
  • the transverse punches are arranged in the press die in such a way that, when one of the transverse punches moves by means of a drive mechanism, the other transverse punches are displaced relative to one another, so that a space provided for receiving the material to be pressed is reduced.
  • the CH 361 195 A describes a press having four lateral, wedge-shaped transverse stamping dies.
  • a pressing force is exerted by a main ram, the transverse punches are fixed relative to one in the press Frame, the oblique contact surfaces for the transverse punch has moved and thereby moved in the transverse pressing direction.
  • the GB 820,327 describes a device for pressing hollow bodies, which comprises four transverse punches. Two of the transverse dies, which face each other, are moved toward each other by transmitting a driving force thereto by means of a lever means. Two further transverse punches are slidably disposed between the two cross punches and are taken when acted upon by the driving force of the other cross punches, being displaced on a surface inclined to the transverse pressing direction.
  • a press that has an eccentric drive for each of the transverse punches, from the WO2007 / 019832 A2 known.
  • the DE 10 08 421 B describes a device for cold or hot forming of compacts of powder masses, which has radially projecting ridges or depressions relative to a cylindrical basic shape, wherein in a substantially circular mold radial compression jaws distributed over the circumference of the form, the radially adjustable by rotational movement of a cam so are that they can serve in their radial movement from outside to inside the shape of the compact used in the mold.
  • the invention has for its object to provide a press of the type mentioned, which is simpler compared to the known presses. According to the invention this object is achieved by a press having the features of claim 1 and a method having the features of claim 9.
  • transverse punches or at least some of the transverse punches can be moved with a single drive, it is no longer necessary to provide a separate drive for each transverse punch.
  • the design effort is less and the press can be produced inexpensively.
  • the moldings can be compressed more homogeneous, since when pressing on in each case a single drive to the moving with this drive cross stamps at the same time the same force is applied and they are always moved synchronously.
  • the transverse punches can be movable radially or, preferably in parallel, offset in the press die. While other directions are conceivable, the transverse punches according to the invention are movable perpendicular to the main pressing direction.
  • each transverse punch on a bearing body which is displaceable in a bearing housing in the respective transverse pressing direction, preferably along a guide.
  • the guide expediently comprises a provided on the bearing body and / or the bearing housing, preferably elongated, projection and provided on the bearing body or the bearing housing and the projection receiving, preferably in cross-section a negative mold of the projection having, in which the projection displaceable is.
  • the counter-holder of the transverse punch has a counter-surface parallel to the surface.
  • the power transmission device is expediently displaceable on the counterholder while moving the transverse punch in the direction opposite to the transverse pressing direction.
  • the surface is expediently tilted by 45 to 85 ° to the transverse pressing direction, preferably by 65 to 75 °, preferably by 60 °.
  • the more the surface is tilted to the transverse pressing direction the smaller is the quotient of the path traveled by the transverse punch to the path traveled by the power transmission device during movement of the power transmission device. Accordingly, the movement of the transverse punches can be controlled more precisely at larger angles.
  • the power transmission device and the transverse punch are connected to one another via a holding member which is attached to the power transmission device or on the transverse punch and slidably held on the transverse punch and / or on the power transmission device, that the transverse punch with its counter surface during movement of the power transmission device held on the surface.
  • the transverse punches are withdrawn after pressing by means of the power transmission device again from the press die. It is prevented that during demoulding of the molding from the press die of the transverse punch is damaged.
  • the power transmission device is expediently circular or, if appropriate, depending on the number of press punches used, a regular polygonal shape. For example, if four or six transverse punches used, the power transmission device may have a square or a regular hexagonal shape.
  • the drive expediently comprises a hydraulic cylinder and / or an electric servomotor.
  • the press is provided with a control unit with which a force to be applied to the transverse punches and / or a path to be traversed by the transverse punches can be set.
  • a measuring device preferably connected to the control unit, is also provided, with which the position of the power transmission device and / or the transverse punch can be determined.
  • no stops for the transverse punches must be provided.
  • the press die and the bearing housings are expediently attached to a support plate of the press, which is preferably fastened to a support device of the press, preferably a press table.
  • the press comprises a plurality of different power transmission devices, for example for different numbers of cross punches or pressing geometries, and the press is set up such that the power transmission devices can be optionally used.
  • a plurality of mounting positions for the transverse punches are provided on the support plate for the bearing housing.
  • the attachment positions may be e.g. be formed by threaded holes for screws, with which the transverse punches are attached to the support plate.
  • the transverse punches can optionally be arranged in different positions to the pressing die.
  • FIG. 1 illustrated part of a press shows a cylindrical die 1, in which a arranged in a main press x along the cylinder axis of the press die 1 recess 2 is provided and a powder guide 20 for filling the recess 2 with powder.
  • the pressing die 2 is provided with six recesses arranged in radial transverse pressing directions y and leading radially up to the recess 2, into which in each case a stamping part 14 projects from the transverse dies 3 arranged around the lateral surface of the pressing die 2.
  • Each transverse punch 3 comprises a slider 8 connected to the stamp member 14, which is mounted in a bearing housing 9 and is provided with an inclined surface 7 on its side opposite the stamp member 14.
  • the press die 2 and the bearing housings 9 of the transverse punches 3 are fastened to a support plate 21, to which a coaxial with the press die 2 arranged bearing ring 16 is further attached.
  • a collar 5 is slidably mounted in the direction of a cylinder axis of the die 2, provided on its inside with six guide surfaces 6 for rings 5 three attached to the support plate 22 hydraulic drives 4, which are connected via a screw rod 25 with the collar 5 , Furthermore, a measuring device 24 is provided on one of the hydraulic drives 4, with which the position of the adjusting ring 5 can be determined.
  • the measuring device 24 is connected to a control unit, not shown here, for controlling the transverse punches 3, with which a position, in which the transverse punches 3 are to be brought, and / or a transverse punches 3 to a molding to-direction of said cylinder axis a main punch 27, which is also fastened to the support plate 22 and a not shown here, an opposite to a pressing force generated by the main punch 27 opposite pressing force generating further main punch, from above into the recess 2 in the press die.
  • a control unit not shown here, for controlling the transverse punches 3, with which a position, in which the transverse punches 3 are to be brought, and / or a transverse punches 3 to a molding to-direction of said cylinder axis a main punch 27, which is also fastened to the support plate 22 and a not shown here, an opposite to a pressing force generated by the main punch 27 opposite pressing force generating further main punch, from above into the recess 2 in the press die.
  • Querst Zis 3 a foot 16 which is provided with holes through which the cross bar 3 is fixed with screws to the support plate 21. It also has two elongate recesses 11 into which an elongate projection 10 of the slider 8 engages. The projection 10 and the recess 11 form a guide for a movement of the slider 8 in the transverse pressing direction y in the bearing housing 9.
  • an elongated recess 19 is provided parallel to the counter surface 7, in the displaceable a holding member 12 is mounted.
  • the holding member 12 is provided with threaded holes in the in Fig. 6 shown screws 28 which are held on the adjusting ring 5.
  • the adjusting ring 5 is moved by means of the hydraulic drives 4. If the adjusting ring 5 is displaced upward, the slides 8 are displaced in the bearing housing 9 against a force of the springs 15 and guided by the projections 10 in the recesses 11 in the direction of the cylinder axis of the pressing die 1. In this case, the holding member 12 slides in the recess 19 in the slide 8 upwards. If the adjusting ring 5 is moved downwards, the holding member 12, supported by the force of the springs 15, pulls the slider 8 in the opposite direction, thereby removing the stamping part 14 from the pressing die 2.
  • the press according to the invention can be used in various ways.
  • the stamp parts 14 can be introduced into the recess 2 of the press die 1 even before the beginning of a pressing operation, then act like a mold for shaping internal contours in the pressed article and are no longer moved during the pressing process, but only after the pressing process has been completed Removal of the molding pulled out of the recess 2.
  • the punch parts 14 can also be used for pressing in the transverse pressing directions y during the pressing process, in that a force of the hydraulic drives 4 is transmitted to the transverse punches 3 via the adjusting ring 5.
  • the pressing force to be applied with the transverse punches 3 or the position into which the transverse punches 3 are to be brought depends on the angle which the inclined surface 6 or the counter surface 7 has to a movement direction of the transverse punches 3.
  • the greater the angle the lower the path of the transverse punch 3 when displacing the adjusting ring 5 in relation to a displacement path of the adjusting ring 5 back.
  • the path to be traveled with the stamp member 14 or the force to be applied for pressing can be controlled.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Description

Die Erfindung betrifft eine Presse zur Herstellung eines Formlings aus pulverförmigem Material, die eine Pressmatrize mit einer Ausnehmung zur Aufnahme des Materials, zumindest einen Hauptstempel zum Pressen des Materials in einer Hauptpressrichtung und zumindest zwei Querstempel aufweist, die in einer zur Hauptpressrichtung queren Querpressrichtung in die Ausnehmung bewegbar sind und für die ein Antrieb vorgesehen ist, eine Kraftübertragungseinrichtung umfasst, die in einer Richtung quer zur Querpressrichtung bewegbar gelagert ist und mit der eine Antriebskraft auf die Querstempel übertragbar ist.
Die Erfindung betrifft ferner ein Verfahren zum Pressen eines Formlings aus pulverförmigem Material.The invention relates to a press for producing a molded article of powdery material, which has a press die with a recess for receiving the material, at least one main punch for pressing the material in a main pressing direction and at least two transverse punches, in a cross-direction transverse to the main pressing direction in the recess are movable and for which a drive is provided, comprising a power transmission device which is movably mounted in a direction transverse to the transverse pressing direction and with which a driving force to the transverse punch is transferable.
The invention further relates to a method for pressing a molded article of powdery material.

Aus der WO2008/150778 geht eine solche Presse hervor, die zwei in der Hauptpressrichtung bewegbaren Stempel sowie eine Pressmatrize umfasst, die eine Hinterschneidung aufweist, in der in einer Kreisform aneinander anliegend und gegeneinander verschiebbar mehrere Querstempel angeordnet sind. Die Querstempel sind derart in der Pressmatrize angeordnet, dass bei Bewegung eines der Querstempel mittels eines Antriebsmechanismus die anderen Querstempel gegeneinander verschoben werden, sodass ein zur Aufnahme des zu pressenden Materials vorgesehener Raum verkleinert wird.From the WO2008 / 150778 goes out such a press, which comprises two movable in the main pressing direction stamp and a die, which has an undercut, in which in a circular shape adjacent to each other and against each other slidably a plurality of transverse punches are arranged. The transverse punches are arranged in the press die in such a way that, when one of the transverse punches moves by means of a drive mechanism, the other transverse punches are displaced relative to one another, so that a space provided for receiving the material to be pressed is reduced.

Die CH 361 195 A beschreibt eine Presse, die vier seitliche, keilförmig geformte Querpresstempel aufweist. Bei Ausübung einer Presskraft durch einen Hauptpressstempel werden die Querstempel gegenüber einem in der Presse fest angeordneten Rahmen, der schräge Anlageflächen für die Querstempel aufweist verschoben und dabei in die Querpressrichtung bewegt.The CH 361 195 A describes a press having four lateral, wedge-shaped transverse stamping dies. When a pressing force is exerted by a main ram, the transverse punches are fixed relative to one in the press Frame, the oblique contact surfaces for the transverse punch has moved and thereby moved in the transverse pressing direction.

Die GB 820 327 beschreibt eine Vorrichtung zum Pressen von Hohlkörpern, die vier Querstempel umfasst. Zwei der Querpresstempel, die einander gegenüberliegen, werden aufeinander zu bewegt, indem mittels einer Hebeleinrichtung eine Antriebskraft auf sie übertragen wird. Zwei weitere Querstempel sind verschiebbar zwischen den beiden Querstempeln angeordnet und werden bei Beaufschlagung mit der Antriebskraft von den anderen Querstempeln mitgenommen, wobei sie an einer zur Querpressrichtung schrägen Fläche verschoben werden.The GB 820,327 describes a device for pressing hollow bodies, which comprises four transverse punches. Two of the transverse dies, which face each other, are moved toward each other by transmitting a driving force thereto by means of a lever means. Two further transverse punches are slidably disposed between the two cross punches and are taken when acted upon by the driving force of the other cross punches, being displaced on a surface inclined to the transverse pressing direction.

Aus der DE 19 37 410 A ist eine Pressform mit abwechselnd im Horizontalschnitt stumpfkeil- und pilzförmigen Pressenden mit zur Peripherie eines Füllraumes leicht geneigten gemeinsamen Gleitflächen, wobei der Füllraum im Radialschnitt ein blütenförmiges Bild aufweist.From the DE 19 37 410 A is a mold with alternately in horizontal section stump wedge and mushroom-shaped press ends with the periphery of a filling space slightly inclined common sliding surfaces, wherein the filling chamber in radial section has a flower-shaped image.

Eine Presse, die für jeden der Querstempel einen Exzenterantrieb aufweist ist, aus der WO2007/019832 A2 bekannt.A press that has an eccentric drive for each of the transverse punches, from the WO2007 / 019832 A2 known.

Bei einer weiteren aus der WO2009/115444 A1 bekannten Presse sind zum Antrieb der Querstempel Hydrauliklinearantriebe vorgesehen, deren Bewegungen über verschiebbare Teile auf die Querstempel übertragen werden.In another from the WO2009 / 115444 A1 known presses are provided for driving the transverse punch hydraulic linear actuators whose movements are transmitted via sliding parts on the transverse punch.

Die DE 10 08 421 B beschreibt eine Vorrichtung zum Kalt- oder Warmverformen von Presslingen aus Pulvermassen, die gegenüber einer zylindrischen Grundform radial vorstehende Stege oder Vertiefungen aufweist, wobei in einer im Wesentlichen runden Pressform Radialpressbacken über den Umfang den Form verteilt angeordnet sind, die durch Drehbewegung einer Kurvenscheibe derart radial verstellbar sind, dass sie bei ihrer Radialbewegung von außen nach innen der Formgebung des in die Pressform eingesetzten Presslings dienen können.The DE 10 08 421 B describes a device for cold or hot forming of compacts of powder masses, which has radially projecting ridges or depressions relative to a cylindrical basic shape, wherein in a substantially circular mold radial compression jaws distributed over the circumference of the form, the radially adjustable by rotational movement of a cam so are that they can serve in their radial movement from outside to inside the shape of the compact used in the mold.

Der Erfindung liegt die Aufgabe zugrunde, eine Presse der eingangs genannten Art zu schaffen, die im Vergleich zu den bekannten Pressen einfacher aufgebaut ist. Erfindungsgemäß wird diese Aufgabe durch eine Presse mit den Merkmalen des Anspruchs 1 und ein Verfahren mit den Merkmalen des Anspruchs 9 gelöst.The invention has for its object to provide a press of the type mentioned, which is simpler compared to the known presses. According to the invention this object is achieved by a press having the features of claim 1 and a method having the features of claim 9.

Da alle Querstempel oder zumindest einige der Querstempel mit jeweils einem einzigen Antrieb bewegt werden können, ist es nicht mehr notwendig, für jeden Querstempel einen eigenen Antrieb vorzusehen. Für den Antrieb der Querstempel wird weniger Platz benötigt, der konstruktive Aufwand ist geringer und die Presse lässt sich kostengünstig herstellen. Ferner lassen sich die Formlinge homogener verdichten, da beim Pressen über jeweils einen einzigen Antrieb an den mit diesem Antrieb bewegten Querstempeln zur gleichen Zeit die gleiche Kraft anliegt und sie stets synchron bewegt werden.Since all transverse punches or at least some of the transverse punches can be moved with a single drive, it is no longer necessary to provide a separate drive for each transverse punch. For driving the transverse punches less space is required, the design effort is less and the press can be produced inexpensively. Furthermore, the moldings can be compressed more homogeneous, since when pressing on in each case a single drive to the moving with this drive cross stamps at the same time the same force is applied and they are always moved synchronously.

Die Querstempel können radial oder, vorzugsweise parallel, versetzt dazu in die Pressmatrize bewegbar sein. Während auch andere Richtungen vorstellbar sind, sind die Querstempel erfindungsgemäss senkrecht zur Hauptpressrichtung bewegbar.The transverse punches can be movable radially or, preferably in parallel, offset in the press die. While other directions are conceivable, the transverse punches according to the invention are movable perpendicular to the main pressing direction.

In einer Ausgestaltung der Erfindung weist jeder Querstempel einen Lagerkörper auf, der in einem Lagergehäuse in der jeweiligen Querpressrichtung, vorzugsweise entlang einer Führung, verschiebbar ist.In one embodiment of the invention, each transverse punch on a bearing body, which is displaceable in a bearing housing in the respective transverse pressing direction, preferably along a guide.

Die Führung umfasst zweckmäßigerweise einen an dem Lagerkörper und/oder dem Lagergehäuse vorgesehenen, vorzugsweise länglichen, Vorsprung und eine an dem Lagerkörper bzw. dem Lagergehäuse vorgesehene und den Vorsprung aufnehmende, vorzugsweise im Querschnitt eine Negativform des Vorsprungs aufweisende, Ausnehmung, in der der Vorsprung verschiebbar ist.The guide expediently comprises a provided on the bearing body and / or the bearing housing, preferably elongated, projection and provided on the bearing body or the bearing housing and the projection receiving, preferably in cross-section a negative mold of the projection having, in which the projection displaceable is.

In einer Ausgestaltung der Erfindung weist der Gegenhalter des Querstempels eine zu der Fläche parallele Gegenfläche auf.In one embodiment of the invention, the counter-holder of the transverse punch has a counter-surface parallel to the surface.

Die Kraftübertragungseinrichtung ist an dem Gegenhalter zweckmäßigerweise unter Bewegung des Querstempels auch in der zur Querpressrichtung entgegengesetzten Richtung verschiebbar.The power transmission device is expediently displaceable on the counterholder while moving the transverse punch in the direction opposite to the transverse pressing direction.

Die Fläche ist zur Querpressrichtung zweckmäßigerweise um 45 bis 85 °, vorzugsweise um 65 bis 75 °, bevorzugt um 60 °, verkippt. Je mehr die Fläche zu der Querpressrichtung verkippt ist, desto kleiner ist bei Bewegung der Kraftübertragungseinrichtung der Quotient aus dem von dem Querstempel zurückgelegten Weg zu dem von der Kraftübertragungseinrichtung zurückgelegten Weg. Entsprechend lässt sich bei größeren Winkeln die Bewegung der Querstempel genauer steuern.The surface is expediently tilted by 45 to 85 ° to the transverse pressing direction, preferably by 65 to 75 °, preferably by 60 °. The more the surface is tilted to the transverse pressing direction, the smaller is the quotient of the path traveled by the transverse punch to the path traveled by the power transmission device during movement of the power transmission device. Accordingly, the movement of the transverse punches can be controlled more precisely at larger angles.

Zweckmäßigerweise sind die Kraftübertragungseinrichtung und der Querstempel über ein Halteglied, das an der Kraftübertragungseinrichtung oder an dem Querstempel befestigt und an dem an dem Querstempel und/oder an der Kraftübertragungseinrichtung verschiebbar gehalten ist, derart miteinander verbunden, dass der Querstempel mit seiner Gegenfläche bei Bewegung der Kraftübertragungseinrichtung an der Fläche gehalten wird. Die Querstempel werden nach dem Pressen mittels der Kraftübertragungseinrichtung wieder aus der Pressmatrize herausgezogen. Es wird verhindert, dass beim Entformen des Formlings aus der Pressmatrize der Querstempel beschädigt wird.Conveniently, the power transmission device and the transverse punch are connected to one another via a holding member which is attached to the power transmission device or on the transverse punch and slidably held on the transverse punch and / or on the power transmission device, that the transverse punch with its counter surface during movement of the power transmission device held on the surface. The transverse punches are withdrawn after pressing by means of the power transmission device again from the press die. It is prevented that during demoulding of the molding from the press die of the transverse punch is damaged.

Während es vorstellbar wäre, an der Presse mehrere Kraftübertragungseinrichtungen vorzusehen, die jeweils mit mehreren Querstempeln zusammenwirken, ist in einer besonders bevorzugten Ausgestaltung der Erfindung nur eine einzige Kraftübertragungseinrichtung vorgesehen. Die Kraftübertragungseinrichtung nimmt zweckmäßigerweise die von bzw. auf die Querstempel wirkende Kräfte auf.While it would be conceivable to provide several power transmission devices on the press, each of which interacts with a plurality of transverse punches, in a particularly preferred embodiment of the invention, only a single power transmission device is provided. The power transmission device expediently absorbs the forces acting on or on the transverse punches.

Die Kraftübertragungseinrichtung ist zweckmäßigerweise kreisförmig oder weist, ggf. je nach Anzahl der verwendeten Pressstempel, eine regelmäßige Polygonform auf. Werden beispielsweise vier oder sechs Querstempel verwendet, kann die Kraftübertragungseinrichtung eine quadratische oder eine regelmäßig sechseckige Form aufweisen.The power transmission device is expediently circular or, if appropriate, depending on the number of press punches used, a regular polygonal shape. For example, if four or six transverse punches used, the power transmission device may have a square or a regular hexagonal shape.

Der Antrieb umfasst zweckmäßigerweise einen Hydraulikzylinder und/oder einen elektrischen Stellmotor. Vorzugsweise ist die Presse mit einer Steuereinheit versehen, mit der eine an den Querstempeln anzulegende Kraft und/oder ein von den Querstempeln zurückzulegender Weg einstellbar ist. Zweckmäßigerweise ist ferner eine, vorzugsweise mit der Steuereinheit verbundene, Messeinrichtung vorgesehen, mit der sich die Position der Kraftübertragungseinrichtung und/oder der Querstempel bestimmen lässt. Vorteilhaft müssen keine Anschläge für die Querstempel vorgesehen werden.The drive expediently comprises a hydraulic cylinder and / or an electric servomotor. Preferably, the press is provided with a control unit with which a force to be applied to the transverse punches and / or a path to be traversed by the transverse punches can be set. Expediently, a measuring device, preferably connected to the control unit, is also provided, with which the position of the power transmission device and / or the transverse punch can be determined. Advantageously, no stops for the transverse punches must be provided.

Die Pressmatrize und die Lagergehäuse sind zweckmäßigerweise an einer Tragplatte der Presse befestigt, die vorzugsweise an einer Trageinrichtung der Presse, vorzugsweise einem Pressentisch, befestigt ist.The press die and the bearing housings are expediently attached to a support plate of the press, which is preferably fastened to a support device of the press, preferably a press table.

In einer weiteren Ausgestaltung der Erfindung umfasst die Presse mehrere unterschiedliche Kraftübertragungseinrichtungen, beispielsweise für unterschiedliche Anzahlen von Querstempeln oder Pressgeometrien, und die Presse ist derart eingerichtet, dass die Kraftübertragungseinrichtungen wahlweise verwendet werden können.In a further embodiment of the invention, the press comprises a plurality of different power transmission devices, for example for different numbers of cross punches or pressing geometries, and the press is set up such that the power transmission devices can be optionally used.

Zweckmäßigerweise sind an der Tragplatte für die Lagergehäuse mehrere Befestigungspositionen für die Querstempel vorgesehen. Die Befestigungspositionen können z.B. durch Gewindebohrungen für Schrauben, mit denen die Querstempel an der Tragplatte befestigt werden, gebildet sein. Je nach Bedarf lassen sich die Querstempel wahlweise in verschiedenen Stellungen zur Pressmatrize anordnen.Conveniently, a plurality of mounting positions for the transverse punches are provided on the support plate for the bearing housing. The attachment positions may be e.g. be formed by threaded holes for screws, with which the transverse punches are attached to the support plate. Depending on requirements, the transverse punches can optionally be arranged in different positions to the pressing die.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen und der beiliegenden, sich auf diese Ausführungsbeispiele beziehenden Zeichnungen näher erläutert. Es zeigen:

Fig. 1
einen Teil einer erfindungsgemäßen Presse in isometrischer Darstellung,
Fig. 2
den Teil noch Fig. 1 in Seitenansicht,
Fig. 3
ein Bauteil der erfindungsgemäßen Presse in isometrischer Darstellung,
Fig. 4
das Bauteil nach Fig. 3 im Schnitt,
Fig. 5
das Bauteil nach Fig. 3 in einem anderen Schnitt, und
Fig. 6
den Teil der erfindungsgemäßen Presse nach Fig. 1 im Schnitt.
The invention will be explained in more detail with reference to embodiments and the accompanying drawings relating to these embodiments. Show it:
Fig. 1
a part of a press according to the invention in isometric view,
Fig. 2
the part still Fig. 1 in side view,
Fig. 3
a component of the press according to the invention in isometric view,
Fig. 4
the component after Fig. 3 on average,
Fig. 5
the component after Fig. 3 in another cut, and
Fig. 6
the part of the press according to the invention Fig. 1 on average.

Ein in Fig. 1 dargestellter Teil einer erfindungsgemäßen Presse zeigt eine zylindrische Pressmatrize 1, in der eine in einer Hauptpresseinrichtung x entlang der Zylinderachse der Pressmatrize 1 angeordnete Ausnehmung 2 vorgesehen ist und eine Pulverführung 20 zur Befüllung der Ausnehmung 2 mit Pulver. Die Pressmatrize 2 ist mit sechs in radialen Querpressrichtungen y angeordneten und radial bis zu der Ausnehmung 2 führenden Ausnehmungen versehen, in die jeweils ein Stempelteil 14 von um die Mantelfläche der Pressmatrize 2 angeordneten Querstempeln 3 vorsteht. Jeder Querstempel 3 umfasst einen mit dem Stempelteil 14 verbundenen Schieber 8, der in einem Lagergehäuse 9 gelagert ist und auf seiner dem Stempelteil 14 gegenüberliegenden Seite mit einer Schrägfläche 7 versehen ist. Die Pressmatrize 2 und die Lagergehäuse 9 der Querstempel 3 sind an einer Tragplatte 21 befestigt, an der ferner ein koaxial zu der Pressmatrize 2 angeordneter Lagerring 16 befestigt ist.An in Fig. 1 illustrated part of a press according to the invention shows a cylindrical die 1, in which a arranged in a main press x along the cylinder axis of the press die 1 recess 2 is provided and a powder guide 20 for filling the recess 2 with powder. The pressing die 2 is provided with six recesses arranged in radial transverse pressing directions y and leading radially up to the recess 2, into which in each case a stamping part 14 projects from the transverse dies 3 arranged around the lateral surface of the pressing die 2. Each transverse punch 3 comprises a slider 8 connected to the stamp member 14, which is mounted in a bearing housing 9 and is provided with an inclined surface 7 on its side opposite the stamp member 14. The press die 2 and the bearing housings 9 of the transverse punches 3 are fastened to a support plate 21, to which a coaxial with the press die 2 arranged bearing ring 16 is further attached.

In dem Lagerring 16 ist in Richtung einer Zylinderachse der Pressmatrize 2 verschiebbar ein Stellring 5 gelagert, der an seiner Innenseite mit sechs Führungsflächen 6 für rings 5 drei an der Tragplatte 22 befestigte Hydraulikantriebe 4 vorgesehen, die über eine Schraubstange 25 mit dem Stellring 5 verbunden sind. Ferner ist an einem der Hydraulikantriebe 4 eine Messeinrichtung 24 vorgesehen, mit der sich die Position des Stellrings 5 bestimmen lässt.In the bearing ring 16, a collar 5 is slidably mounted in the direction of a cylinder axis of the die 2, provided on its inside with six guide surfaces 6 for rings 5 three attached to the support plate 22 hydraulic drives 4, which are connected via a screw rod 25 with the collar 5 , Furthermore, a measuring device 24 is provided on one of the hydraulic drives 4, with which the position of the adjusting ring 5 can be determined.

Die Messeinrichtung 24 ist mit einer hier nicht gezeigten Steuereinheit zur Steuerung der Querstempel 3 verbunden, mit der sich eine Position, in die die Querstempel 3 zu bringen sind und/oder eine durch die Querstempel 3 an einem Formling anzu-Richtung der genannten Zylinderachse einen Hauptstempel 27, der ebenfalls an der Tragplatte 22 befestigt ist sowie einen hier nicht gezeigten, eine zu einer durch den Hauptstempel 27 erzeugten Presskraft entgegengesetzten Presskraft erzeugenden weiteren Hauptstempel, der von oben in die Ausnehmung 2 in der Pressmatrize 1The measuring device 24 is connected to a control unit, not shown here, for controlling the transverse punches 3, with which a position, in which the transverse punches 3 are to be brought, and / or a transverse punches 3 to a molding to-direction of said cylinder axis a main punch 27, which is also fastened to the support plate 22 and a not shown here, an opposite to a pressing force generated by the main punch 27 opposite pressing force generating further main punch, from above into the recess 2 in the press die. 1

Querstempels 3 einen Fuß 16 auf, der mit Bohrungen versehen ist, durch die hindurch der Querstempel 3 mit Schrauben an der Tragplatte 21 befestigt ist. Er weist ferner zwei längliche Ausnehmungen 11 auf, in die ein länglicher Vorsprung 10 des Schiebers 8 eingreift. Der Vorsprung 10 und die Ausnehmung 11 bilden eine Führung für eine Bewegung des Schiebers 8 in der Querpressrichtung y in dem Lagergehäuse 9. An der dem Stempelteil 14 gegenüberliegenden Seite des Schiebers 8 ist parallel zu der Gegenfläche 7 eine längliche Ausnehmung 19 vorgesehen, in der verschiebbar ein Halteglied 12 gelagert ist. Das Halteglied 12 ist mit Gewindebohrungen vorgesehen, in die in Fig. 6 gezeigte Schrauben 28 eingreifen, die an dem Stellring 5 gehalten sind. Wie insbesondere den Fig. 4 und 5 zu entnehmen ist, sind in dem Schieber 8 parallel zu den länglichen Vorsprüngen 10 ferner zwei Bohrungen vorgesehen, in denen jeweils eine Schraubenfeder 15 angeordnet ist, die sich mit ihrem einen Ende an dem jeweiligen Ende der Bohrung abstützt und mit ihrem anderen Um die Schieber 8 mit den Stempelteilen 14 zu bewegen, wird mittels der Hydraulikantriebe 4 der Stellring 5 bewegt. Wird der Stellring 5 nach oben verschoben, werden die Schieber 8 in dem Lagergehäuse 9 gegen eine Kraft der Federn 15 und von den Vorsprüngen 10 in den Ausnehmungen 11 geführt in Richtung zu der Zylinderachse der Pressmatrize 1 verschoben. Dabei gleitet das Halteglied 12 in der Ausnehmung 19 in dem Schieber 8 nach oben.
Wird der Stellring 5 nach unten bewegt, zieht das Halteglied 12 unterstützt von der Kraft der Federn 15 den Schieber 8 in die entgegengesetzte Richtung und dabei den Stempelteil 14 von der Pressmatrize 2 weg.Querstempels 3 a foot 16, which is provided with holes through which the cross bar 3 is fixed with screws to the support plate 21. It also has two elongate recesses 11 into which an elongate projection 10 of the slider 8 engages. The projection 10 and the recess 11 form a guide for a movement of the slider 8 in the transverse pressing direction y in the bearing housing 9. At the opposite side of the stamp member 14 of the slide 8, an elongated recess 19 is provided parallel to the counter surface 7, in the displaceable a holding member 12 is mounted. The holding member 12 is provided with threaded holes in the in Fig. 6 shown screws 28 which are held on the adjusting ring 5. As in particular the 4 and 5 can be seen, in the slide 8 parallel to the elongated projections 10 also two holes are provided, in each of which a coil spring 15 is arranged, which is supported with its one end to the respective end of the bore and with their other In order to move the slide 8 with the stamp parts 14, the adjusting ring 5 is moved by means of the hydraulic drives 4. If the adjusting ring 5 is displaced upward, the slides 8 are displaced in the bearing housing 9 against a force of the springs 15 and guided by the projections 10 in the recesses 11 in the direction of the cylinder axis of the pressing die 1. In this case, the holding member 12 slides in the recess 19 in the slide 8 upwards.
If the adjusting ring 5 is moved downwards, the holding member 12, supported by the force of the springs 15, pulls the slider 8 in the opposite direction, thereby removing the stamping part 14 from the pressing die 2.

Zum Pressen von Formlingen kann die erfindungsgemäße Presse in verschiedenen Arten verwendet werden.
Zum einen können die Stempelteile 14 schon vor Beginn eines Pressvorgangs in die Ausnehmung 2 der Pressmatrize 1 eingeführt werden, wirken dann zur Formgebung von Innenkonturen in dem Pressling wie eine Pressform und werden während des Pressvorgangs nicht mehr bewegt, sondern lediglich nachdem der Pressvorgang abgeschlossen ist vor Entformung des Formlings aus der Ausnehmung 2 herausgezogen.
Ferner können die Stempelteile 14 während des Pressvorgangs auch zum Pressen in den Querpressrichtungen y verwendet werden, indem über den Stellring 5 auf die Querstempel 3 eine Kraft der Hydraulikantriebe 4 übertragen wird.For pressing moldings, the press according to the invention can be used in various ways.
On the one hand, the stamp parts 14 can be introduced into the recess 2 of the press die 1 even before the beginning of a pressing operation, then act like a mold for shaping internal contours in the pressed article and are no longer moved during the pressing process, but only after the pressing process has been completed Removal of the molding pulled out of the recess 2.
Furthermore, the punch parts 14 can also be used for pressing in the transverse pressing directions y during the pressing process, in that a force of the hydraulic drives 4 is transmitted to the transverse punches 3 via the adjusting ring 5.

Die mit den Querstempeln 3 aufzubringende Presskraft bzw. die Position, in die die Querstempel 3 zu bringen ist, ist wie oben beschrieben, von dem Winkel abhängig, den die Schrägfläche 6 bzw. die Gegenfläche 7 zu einer Bewegungsrichtung der Querstempel 3 aufweist. Je größer der Winkel ist, desto geringere Wege legt der Querstempel 3 bei Verschiebung des Stellrings 5 im Verhältnis zu einem Verschiebungsweg des Stellrings 5 zurück. Entsprechend genauer lässt sich der mit dem Stempelteil 14 zurückzulegende Weg bzw. die zum Pressen anzulegende Kraft steuern.The pressing force to be applied with the transverse punches 3 or the position into which the transverse punches 3 are to be brought, as described above, depends on the angle which the inclined surface 6 or the counter surface 7 has to a movement direction of the transverse punches 3. The greater the angle, the lower the path of the transverse punch 3 when displacing the adjusting ring 5 in relation to a displacement path of the adjusting ring 5 back. Correspondingly, the path to be traveled with the stamp member 14 or the force to be applied for pressing can be controlled.

Claims (9)

  1. Press for manufacturing a moulded part out of powder material, which has a female press mould (1) with a recess (2) to hold the material to be pressed, at least one main press die for pressing the material in a main pressing direction (x) and at least two transverse dies (3), which can be moved into the recess (2) in a transverse pressing direction (y) transverse with respect to the main pressing direction (x) and for which there is provided a drive (4) which comprises a force transfer device (5) which is mounted such that it can move in a direction transverse to the transverse pressing direction (y) and with which a drive force can be transferred to the transverse dies (3), characterized in that
    the force transfer device (5) has a substantially annular or frame-like form which is arranged in a plane perpendicular to the main pressing direction (x), on the force transfer device (5), there are formed surfaces (6) which are inclined with respect to the transverse pressing direction (y), on which in each case a pressure plate of respectively one of the transverse dies (3) bears and, by moving the force transfer device (5) in the main pressing direction (x) while moving the transverse dies (3) in the respective transverse pressing direction, the inclined surfaces (6) can be displaced towards the pressure plates in order to press the powder material.
  2. Press according to Claim 1,
    characterized in that
    each transverse die (3) comprises a bearing element (8) which can be displaced in the transverse pressing direction (y) in a bearing housing (9), preferably along a guide (10, 11).
  3. Press according to Claim 2,
    characterized in that
    the guide comprises a preferably elongated projection (10) provided on the bearing element (8) and/or the bearing housing (9) and a recess (11) provided on the bearing element (8) or the bearing housing (9) and accommodating the projection (10), preferably having in cross section a negative form of the projection (10), in which recess the projection (10) can be displaced.
  4. Press according to one of Claims 1 to 3,
    characterized in that
    the pressure plate has a mating surface (7) parallel to the inclined surface (6), and the pressure plate can be displaced on the surface (6).
  5. Press according to one of Claims 1 to 4,
    characterized in that
    the force transfer device (5) is mounted such that it can rotate about an axis of rotation parallel to the main pressing direction (x).
  6. Press according to either of Claims 4 and 5,
    characterized in that
    the surface (6) is tilted with respect to the transverse pressing direction (y) by 45 to 85°, preferably by 65 to 75°, preferably by 70°.
  7. Press according to one of Claims 4 to 6,
    characterized in that
    the force transfer device (5) and the transverse die (3) are connected to each other via a holding element (12), which is fixed to the force transfer device (5) or to the transverse die (3) and is displaceably held on the transverse die (3) or on the force transfer device (5), in such a way that the transverse die (3) is held with its mating surface (7) on the surface (6) during movement of the force transfer device (5).
  8. Press according to one of Claims 1 to 7,
    characterized in that
    the drive (4) comprises a hydraulic cylinder and/or an electric actuating motor and a control unit is preferably provided for the drive (4).
  9. Method for manufacturing a moulded part out of powder material by using a press in which the material is put into a recess (2) in a female press mould (1), the material in the female press mould is pressed in a main pressing direction (x) by a main press die, at least two transverse dies (3) are moved into the recess (2) or at least in the direction of the recess in a transverse pressing direction (y) transverse with respect to the main pressing direction (x) before and/or during the pressing in the main pressing direction (x), a plurality of transverse dies (3) being moved jointly by means of a force transfer device (5) with which a drive force is transferred to a plurality of the transverse dies (3),
    characterized in that
    the force transfer device (5), which has a substantially annular or frame-like form, which is arranged in a plane perpendicular to the main pressing direction (x), and on which there are formed surfaces (6) that are inclined with respect to the transverse pressing direction (y), on which in each case a pressure plate of respectively one of the transverse dies (3) bears, is moved in the main pressing direction (x) in order to press the powder material, the inclined surfaces (6) being displaced towards the pressure plates while moving the transverse press dies (3) in the respective transverse pressing direction.
EP11183978.3A 2010-10-13 2011-10-05 Press and method for manufacturing a moulded part out of powder material Not-in-force EP2441573B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010048183 DE102010048183A1 (en) 2010-10-13 2010-10-13 Press and method for producing a molded article of powdery material

Publications (3)

Publication Number Publication Date
EP2441573A2 EP2441573A2 (en) 2012-04-18
EP2441573A3 EP2441573A3 (en) 2013-11-13
EP2441573B1 true EP2441573B1 (en) 2015-08-26

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DE (1) DE102010048183A1 (en)

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US11267214B2 (en) 2016-10-12 2022-03-08 Horn Hartstoffe Gmbh Manufacturing a hard-metal pressed article

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WO2014090226A1 (en) * 2012-12-14 2014-06-19 Dorst Technologies Gmbh & Co. Kg Ceramic and/or metal powder press arrangement for pressing a moulded part
DE102012024503A1 (en) * 2012-12-14 2014-06-18 Dorst Technologies Gmbh & Co. Kg Modular ceramic and/or metal powder assembly, useful in press/adapter for pressing molded part, comprises die, lateral adjustment drive module for adjusting transverse punch in lateral adjustment device, and holding device having housing
DE102013109157B4 (en) 2013-08-23 2016-06-09 Fette Compacting Gmbh Press for the production of compacts of powdered material
CH710828B1 (en) 2015-03-05 2019-06-28 Dietmar W Kramer Dr Sc Techn Eth Phd Powder press and a chuck housing with preferably several for a transverse presses slidable punches.
DE102017105364A1 (en) 2017-03-14 2018-09-20 Gkn Sinter Metals Engineering Gmbh Method for producing a green compact with a pressing tool, a pressing tool, a green compact and a sintered part

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Publication number Priority date Publication date Assignee Title
US11267214B2 (en) 2016-10-12 2022-03-08 Horn Hartstoffe Gmbh Manufacturing a hard-metal pressed article

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EP2441573A2 (en) 2012-04-18
DE102010048183A1 (en) 2012-04-19
EP2441573A3 (en) 2013-11-13

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