EP1731246B1 - Apparatus to produce a variety of formed parts of powder. - Google Patents

Apparatus to produce a variety of formed parts of powder. Download PDF

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Publication number
EP1731246B1
EP1731246B1 EP06008152A EP06008152A EP1731246B1 EP 1731246 B1 EP1731246 B1 EP 1731246B1 EP 06008152 A EP06008152 A EP 06008152A EP 06008152 A EP06008152 A EP 06008152A EP 1731246 B1 EP1731246 B1 EP 1731246B1
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EP
European Patent Office
Prior art keywords
die
specified
extrusion
powder
base body
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EP06008152A
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German (de)
French (fr)
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EP1731246A1 (en
Inventor
Norbert Nies
Walter Solty
Bernd Horn
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SMS Group GmbH
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SMS Meer GmbH
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Publication of EP1731246A1 publication Critical patent/EP1731246A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—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 co-operating with a fixed mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction

Definitions

  • the invention relates to an apparatus for producing a molded part from powder, in particular from metal powder, from a doughy material containing a powder, from a flowable material containing a powder or from pre-pressed material, comprising a die consisting of a base body and one in this used Matrizenhülse consists, at least two concentrically arranged, hollow cylindrical parts and forms at least one molding surface for the molding, at least one ram that can enter into an opening defined by the Matrizenhülse in a pressing direction and compress material located in the Matrizenhülse, and means , with which the at least two parts of the die sleeve in the pressing direction are displaceable relative to each other.
  • Such devices are by the JP 09176701 A . US 5,364,253 A or US 3,524,220 A and in the arrangement with a stationary die sleeve and a relative to this relatively displaceable additional ram, which dips into the mold space through which JP 63154299 A known.
  • a plurality of punches are used, which can move in an axial direction.
  • the punches can dive into an axially closed on one side mold or come in an axially open in both directions die from both axial directions. Occasionally, through mandrel rods are used, but primarily have no compression function, but a positive displacement function.
  • the punches can also dip laterally into the die to create undercuts or other geometric shapes. To demould the molded part, these radially dipping punch are withdrawn so far that the demolding is not hindered.
  • the die usually consists of a die ring (matrix base body) and a die bushing or sleeve inserted therein with the workpiece contour.
  • WO 02/32655 A1 From the WO 02/32655 A1 is a powder press tool is known, which is provided that it is formed in a Auspressabites so that the Auspresskanal supporting die walls are becoming increasingly thin. By thinning walls in this area, a gradually increasing compliance of the tool is achieved, whereby the demolding is to be facilitated.
  • a pressing device for powdery and granular material in which two matrices whose end faces include the contour of the, form part by guides form an angle, wherein the surfaces of the end faces of the matrices when reaching the final contour of the molding directly close to each other.
  • the invention is therefore the object of a device of the type mentioned in such a way that a high degree of freedom in the production of molded parts is created, with a very compact design should be possible, which is optionally also suitable to convert existing devices.
  • a refinement provides that the part which is fixedly arranged in the main body bears against the cylindrical inner surface of the displaceably arranged part by means of a section of its cylindrical outer surface.
  • the means for displacing the at least one part of the die sleeve can be designed as a hydraulic piston-cylinder system.
  • the cylinder of the piston-cylinder system is preferably designed as an annular groove in the main body of the die.
  • one end of the die sleeve is closed with a plate.
  • a plate In this case, only one side enters a punch in the Matrizenhülse.
  • the plate is determined with advantage on the displaceably arranged part of the die sleeve.
  • the pressing die may consist of a plurality of preferably concentric hollow cylindrical parts. It can have a centrally arranged rod.
  • the die sleeve is equipped with an integrated possibility of movement, with the pressure can be applied in stages to the introduced into the die sleeve powder.
  • inventively created further press axis increases the design possibilities in the production of powder pressed parts.
  • Fig. 1 schematically a device is shown, with which a metal powder 15 can be pressed into a molded part.
  • the device has a die 1, which consists of a hollow cylindrical base body 2, into which a die sleeve 3 is coaxially inserted. So that the die sleeve 3 is highly resistant to wear, it preferably consists of hard metal.
  • the die sleeve 3 defines a cylindrical molding surface 4.
  • the metal powder 15 is introduced into the space formed by this molding surface.
  • Both from above and from below can then ever a ram 5 are inserted into the respective openings of the die sleeve 3 in the pressing direction P and axially moved towards each other. In this case, a pressing force F p is exerted on the punches 5, so that the powder 15 is compressed.
  • the device is not only suitable for the processing of powder. Frequently, an already preformed compact is re-pressed in a further step, especially in the final pressing at higher pressures, which is a particularly important application of the device according to the invention and the corresponding method.
  • a die 1 together with a ram 5 is shown.
  • the die 1 has a base body 2, in which a two-part die sleeve 3 is inserted.
  • the die sleeve 3 consists of the two hollow cylindrical parts 6 and 7. While the part 6 is firmly fixed in the base body 2, the other part 7 of the die sleeve 3 is mounted displaceably in the pressing direction P.
  • the two parts 6 and 7 of the die sleeve 3 have radially inwardly facing forming surfaces 4, which define the outer contour of the compact to be formed.
  • the shape of the compact is further determined by a plate 12 arranged on the front side on the movable part 7 of the die sleeve 3. Furthermore, its shape results from the press die 5 to be inserted from below into the die sleeve 3.
  • the press ram 5 consists of a plurality of concentrically arranged sleeves 13, 13 ', 13 ", ..., from whose axial relative position the shape of the compact results correspondingly. [... Die]
  • the sleeves 13, 13', 13", ... are concentric arranged to a rod 14.
  • the ram 5 is acted upon by a non-illustrated movement element with the pressing force F P.
  • the displaceable part 7 of the die sleeve 3 with a cylindrical inner surface 10 surrounds the cylindrical outer surface 9 of the part 6 stationarily arranged in the die sleeve 3. Both cooperating surfaces 9, 10 are tolerated so that a displaceability of both parts 6 , 7 is possible, yet there is only the smallest possible gap between the two parts.
  • the movement of the displaceable part 7 of the die sleeve 3 relative to the stationarily arranged part 6 takes place by means 8, which are designed as a hydraulic piston-cylinder system.
  • an annular groove 11 is incorporated in the base body 2 of the die 1, which serves as a cylinder for an inserted annular piston 16.
  • the cylinder 11 communicates with two fluid lines 17 and 18, via which controlled or controlled hydraulic oil can be entered into the cylinder chamber to the piston 16 controlled or to move in a desired relative position to the cylinder 11, whereby the part 7 accordingly is positioned.
  • the maximum displacement of the part 7 relative to the part 6 of the die sleeve 3 is indicated by x.

Abstract

In apparatus for forming a molding from powder, comprising (a) a matrix (1) formed from a base structure (2) in which a matrix sheath (3) with shaping surface(s) (4) for the molding is inserted and (b) pressing punch(es) (5) entering an opening in the sheath in a pressing direction (P) to compress the material in the sheath, the sheath is formed from at least two parts (6, 7), which are relatively displaceable in the pressing direction.

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen eines Formteils aus Pulver, insbesondere aus Metallpulver, aus einem ein Pulver enthaltenden, teigigen Material, aus einem ein Pulver enthaltenden, fließfähigen Material oder aus vorgepresstem Material, umfassend eine Matrize, die aus einem Grundkörper und einer in diesen eingesetzten Matrizenhülse besteht, mindestens zwei konzentrisch zueinander angeordnete, hohlzylindrische Teile aufweist und mindestens eine Formfläche für das Formteil bildet, mindestens einen Pressstempel, der in eine durch die Matrizenhülse definierte Öffnung in eine Pressrichtung eintreten und sich in der Matrizenhülse befindliches Material verdichten kann, und Mittel, mit denen die mindestens zwei Teile der Matrizenhülse in Pressrichtung relativ zueinander verschiebbar sind. Solche Vorrichtungen sind durch die JP 09176701 A , US 5.364.253 A oder US 3.524.220 A und in der Anordnung mit einer feststehenden Matrizenhülse und einem zu dieser relativ verschiebbaren, zusätzlichen Pressstempel, der in den Formraum eintaucht, durch die JP 63154299 A bekannt geworden.The invention relates to an apparatus for producing a molded part from powder, in particular from metal powder, from a doughy material containing a powder, from a flowable material containing a powder or from pre-pressed material, comprising a die consisting of a base body and one in this used Matrizenhülse consists, at least two concentrically arranged, hollow cylindrical parts and forms at least one molding surface for the molding, at least one ram that can enter into an opening defined by the Matrizenhülse in a pressing direction and compress material located in the Matrizenhülse, and means , with which the at least two parts of the die sleeve in the pressing direction are displaceable relative to each other. Such devices are by the JP 09176701 A . US 5,364,253 A or US 3,524,220 A and in the arrangement with a stationary die sleeve and a relative to this relatively displaceable additional ram, which dips into the mold space through which JP 63154299 A known.

Mit Vorrichtungen der gattungsgemäßen Art ist es möglich, Formteile aus Metallpulver durch Pressen und anschließendes Sintern herzustellen. Bekannt ist es, für das Pressen von pulverförmigem Werkstoff stempelartige Werkzeuge einzusetzen, die in eine Matrize eingebrachtes Pulver durch eine axiale Pressbewegung komprimieren. Hierzu ist zumindest ein Pressstempel erforderlich, der in die Matrize eindringt. In diesem Falle besitzt die Matrize einen Hohlraum, der zur Stempelseite hin geöffnet ist. Die Matrizenöffnung wird - bis auf ein geringfügiges Spiel - vom Stempel geschlossen. Der Stempel baut durch sein Eindringen in den Matrizenhohlraum den zur Verdichtung notwendigen Druck auf.With devices of the generic type, it is possible to produce molded parts from metal powder by pressing and subsequent sintering. It is known to use for the pressing of powdery material stamp-like tools that compress powder introduced into a die by an axial pressing movement. For this purpose, at least one ram is required, which penetrates into the die. In this case, the die has a cavity which is open to the punch side. The die opening is closed - except for a slight play - by the stamp. The stamp builds up by its penetration into the Matrizenhohlraum necessary for compression pressure.

Es kann auch vorgesehen werden, dass mehrere Stempel eingesetzt werden, die sich in eine Achsrichtung bewegen können. Die Stempel können dabei in eine axial einseitig geschlossene Matrize eintauchen oder bei einer axial in beiden Richtungen offenen Matrize aus beiden axialen Richtungen kommen. Gelegentlich werden auch durchgehende Dornstangen eingesetzt, die aber primär keine Verdichtungsfunktion, sondern eine Verdrängerfunktion haben. Die Stempel können auch seitlich in die Matrize eintauchen, um Hinterschneidungen oder sonstige geometrische Ausprägungen zu erzeugen. Zur Entformung des Formteils werden diese radial eintauchenden Stempel so weit zurückgezogen, dass die Entformung nicht behindert wird.It can also be provided that a plurality of punches are used, which can move in an axial direction. The punches can dive into an axially closed on one side mold or come in an axially open in both directions die from both axial directions. Occasionally, through mandrel rods are used, but primarily have no compression function, but a positive displacement function. The punches can also dip laterally into the die to create undercuts or other geometric shapes. To demould the molded part, these radially dipping punch are withdrawn so far that the demolding is not hindered.

Üblicherweise besteht die Matrize aus einem Matrizenring (Matrizengrundkörper) und einer darin eingesetzten Matrizenbuchse bzw. -hülse mit der Werkstückkontur.The die usually consists of a die ring (matrix base body) and a die bushing or sleeve inserted therein with the workpiece contour.

Durch die US 5.455.002 A ist es bekannt geworden, im oberen. Ende einer einstückigen Matrizenhülse eine Konturausnehmung vorzusehen, die im Durchmesser größer ist, als die sich anschließende Durchgangsbohrung des unteren Matrizenendes. In die Durchgangsbohrung taucht zum Pressvorgang ein Gegenstempel ein.By the US 5,455,002 A it has become known in the upper. End of a one-piece die sleeve to provide a contour recess which is larger in diameter than the subsequent through hole of the lower die end. In the through hole immersed in the pressing process a counter punch.

Aus der WO 02/32655 A1 ist ein Pulverpress-Werkzeug bekannt, bei dem vorgesehen ist, dass es in einem Auspressabschnitt so ausgebildet ist, dass die den Auspresskanal stützenden Matrizenwände zunehmend dünner werden. Durch die dünner werdenden Wände in diesem Bereich wird eine allmählich steigende Nachgiebigkeit des Werkzeugs erreicht, wodurch die Entformung erleichtert werden soll.From the WO 02/32655 A1 is a powder press tool is known, which is provided that it is formed in a Auspressabschnitt so that the Auspresskanal supporting die walls are becoming increasingly thin. By thinning walls in this area, a gradually increasing compliance of the tool is achieved, whereby the demolding is to be facilitated.

Nach der DE 198 30 601 A1 ist eine Pressvorrichtung für pulver- und granulatförmigen Werkstoff vorgesehen, bei der zwei Matrizen, deren Stirnseiten die Kontur des, Formteils beinhalten, durch Führungen einen Winkel einschließen, wobei die Flächen der Stirnseiten der Matrizen beim Erreichen der Endkontur des Formteils direkt aneinander schließen.After DE 198 30 601 A1 a pressing device for powdery and granular material is provided, in which two matrices whose end faces include the contour of the, form part by guides form an angle, wherein the surfaces of the end faces of the matrices when reaching the final contour of the molding directly close to each other.

Zur Erzeugung von Formteilen mit einem Hinterschnitt - in Entformrichtung des Formteils gesehen - ist aus der DE 195 08 952 C2 eine Pressvorrichtung mit einer Matrize und mehreren Stempeln bekannt, wobei ein Segmentschieber zum Einsatz kommt, der mittels entsprechender Vorschub- und Rückzugseinrichtungen auch während des Pressvorgangs für das Formteil nach dem - Schließen der Pressform bewegt werden kann.For the production of moldings with an undercut - seen in Entformrichtung of the molding - is from the DE 195 08 952 C2 a press device with a die and a plurality of punches known, wherein a segment slider is used, which can be moved by means of appropriate feed and retraction devices during the pressing operation for the molding after - closing the mold.

Zur Erzeugung des Pressdrucks auf die Presstempel selber ist es aus der EP 1 097 801 A1 bekannt, eine Vorrichtung vorzusehen, bei der zur Erzielung einer kompakten Bauart ein hydraulisches Element mit einem Piezo-Aktuator zusammenwirkt.To generate the pressing pressure on the ram itself, it is from the EP 1 097 801 A1 It is known to provide a device in which, in order to achieve a compact design, a hydraulic element cooperates with a piezoactuator.

Wünschenswert ist es dabei, eine hohe Funktionalität und Variabilität durch relativ zueinander bewegliche Werkzeugteile zu erreichen. Hierdurch werden Freiheitsgrade bei der Fertigungsmöglichkeit von Formteilen geschaffen. Dem steht allerdings die Forderung nach möglichst kompakter Bauart der Vorrichtung gegenüber. Jede zusätzlich Pressachse erfordert eine wesentliche Vergrößerung des Werkzeugeinbauraumes in der Pressvorrichtung. Damit scheidet eine Umrüstung vorhandener Pressvorrichtungen meist aus.It is desirable to achieve high functionality and variability by relatively movable tool parts. As a result, degrees of freedom in the production possibility of molded parts are created. However, this is the demand for the most compact design of the device compared. Each additional press shaft requires a significant increase in the tool installation space in the pressing device. This usually eliminates a conversion of existing press devices.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so fortzubilden, dass ein hoher Freiheitsgrad bei der Fertigung von Formteilen geschaffen wird, wobei eine sehr kompakte Bauart möglich sein soll, die sich gegebenenfalls auch dazu eignet, vorhandene Vorrichtungen umzurüsten.The invention is therefore the object of a device of the type mentioned in such a way that a high degree of freedom in the production of molded parts is created, with a very compact design should be possible, which is optionally also suitable to convert existing devices.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass ein Matrizenhülsenteil ortsfest im Grundkörper und innerhalb eines in Pressrichtung verschiebbaren weiteren Matrizenhülsenteils angeordnet ist.This object is achieved in that a Matrizenhülsenteil stationary in the base body and disposed within a displaceable in the pressing direction further Matrizenhülsenteils.

Eine Fortbildung sieht vor, dass das im Grundkörper ortsfest angeordnete Teil mit einem Abschnitt seiner-zylindrischen Außenfläche an der zylindrischen Innenfläche des verschieblich angeordneten Teils anliegt.A refinement provides that the part which is fixedly arranged in the main body bears against the cylindrical inner surface of the displaceably arranged part by means of a section of its cylindrical outer surface.

Die Mittel zum Verschieben des mindestens einen Teils der Matrizenhülse können als hydraulisches Kolben-Zylinder-System ausgebildet sein. Der Zylinder des Kolben-Zylinder-Systems ist dabei bevorzugt als Ringnut im Grundkörper der Matrize ausgebildet.The means for displacing the at least one part of the die sleeve can be designed as a hydraulic piston-cylinder system. The cylinder of the piston-cylinder system is preferably designed as an annular groove in the main body of the die.

Nach einer Ausgestaltung der Erfindung ist vorgesehen, dass das eine Ende der Matrizenhülse mit einer Platte abgeschlossen ist. In diesem Falle tritt nur einseitig ein Pressstempel in die Matrizenhülse ein. Die Platte ist dabei mit Vorteil an dem verschiebbar angeordneten Teil der Matrizenhülse festgelegt.According to one embodiment of the invention, it is provided that one end of the die sleeve is closed with a plate. In this case, only one side enters a punch in the Matrizenhülse. The plate is determined with advantage on the displaceably arranged part of the die sleeve.

Der Pressstempel kann aus mehreren vorzugsweise konzentrisch angeordneten hohlzylindrischen Teilen bestehen. Er kann eine zentral angeordnete Stange aufweisen.The pressing die may consist of a plurality of preferably concentric hollow cylindrical parts. It can have a centrally arranged rod.

Mit der vorgeschlagenen Ausgestaltung wird erreicht, dass die Matrizenhülse mit einer integrierten Bewegungsmöglichkeit ausgestattet ist, mit der Druck stufenweise auf das in die Matrizenhülse eingebrachte Pulver ausgeübt werden kann. Durch die erfindungsgemäß geschaffene weitere Pressachse erhöht sich die Gestaltungsmöglichkeit bei der Fertigung von Pulverpressteilen.With the proposed embodiment it is achieved that the die sleeve is equipped with an integrated possibility of movement, with the pressure can be applied in stages to the introduced into the die sleeve powder. By inventively created further press axis increases the design possibilities in the production of powder pressed parts.

Eine wesentliche Vergrößerung des Werkzeugeinbauraums der Pressvorrichtung ist nicht erforderlich, so dass sich in einfacher Weise eine Nachrüstung vorhandener Anlagen ermöglichen lässt.A substantial increase in the tool installation space of the pressing device is not required, so that a retrofitting of existing systems can be made possible in a simple manner.

Von großem Vorteil ist es auch, dass eine nur geringe Hubbewegung mittels des Kolben-Zylinder-Systems ausgeführt werden muss, um Formteile zu pressen. Bei vorbekannten Lösungen musste in vergleichbaren Fällen zumeist die gesamte Matrize von einem Unterkolben bewegt werden, was mit dem erfindungsgemäßen Vorschlag nicht mehr nötig ist.Of great advantage is also that only a small lifting movement must be performed by means of the piston-cylinder system to press moldings. In previously known solutions, in most cases the entire matrix had to be moved by a lower piston, which is no longer necessary with the proposal according to the invention.

Weitere Merkmale und Einzelheiten der Erfindung ergeben sich aus den Ansprüchen und der Beschreibung eines in den Zeichnungen dargestellten Ausführungsbeispiels der Erfindung. Es zeigen:

Fig. 1
eine Prinzipdarstellung des Pressens von Metallpulver; und
Fig. 2
eine Schnittdarstellung durch eine Matrize mit eingeführtem Presstempel.
Further features and details of the invention will become apparent from the claims and the description of an embodiment of the invention shown in the drawings. Show it:
Fig. 1
a schematic representation of the pressing of metal powder; and
Fig. 2
a sectional view through a die with inserted ram.

In Fig. 1 ist schematisch eine Vorrichtung dargestellt, mit der ein Metallpulver 15 zu einem Formteil gepresst werden kann. Die Vorrichtung weist eine Matrize 1 auf, die aus einem hohlzylindrischen Grundkörper 2 besteht, in den koaxial eine Matrizenhülse 3 eingesetzt ist. Damit die Matrizenhülse 3 hochresistent gegen Verschleiß ist, besteht sie bevorzugt aus Hartmetall. Die Matrizenhülse 3 definiert eine zylindrische Formfläche 4. In den von dieser Formfläche gebildeten Raum wird das Metallpulver 15 eingebracht. Sowohl von oben als auch von unten können dann je ein Pressstempel 5 in die jeweiligen Öffnungen der Matrizenhülse 3 in Pressrichtung P eingeschoben und axial aufeinander zu bewegt werden. Dabei wird auf die Stempel 5 eine Presskraft Fp ausgeübt, so dass das Pulver 15 verdichtet wird.In Fig. 1 schematically a device is shown, with which a metal powder 15 can be pressed into a molded part. The device has a die 1, which consists of a hollow cylindrical base body 2, into which a die sleeve 3 is coaxially inserted. So that the die sleeve 3 is highly resistant to wear, it preferably consists of hard metal. The die sleeve 3 defines a cylindrical molding surface 4. The metal powder 15 is introduced into the space formed by this molding surface. Both from above and from below can then ever a ram 5 are inserted into the respective openings of the die sleeve 3 in the pressing direction P and axially moved towards each other. In this case, a pressing force F p is exerted on the punches 5, so that the powder 15 is compressed.

Es sei angemerkt, dass die Vorrichtung nicht nur für die Verarbeitung von Pulver geeignet ist. Häufig wird ein bereits vorgeformter Pressling in einem weiteren Schritt nachgepresst, insbesondere beim abschließenden Pressen mit höheren Drücken, was eine besonders wichtige Anwendung der erfindungsgemäßen Vorrichtung und des entsprechenden Verfahrens ist.It should be noted that the device is not only suitable for the processing of powder. Frequently, an already preformed compact is re-pressed in a further step, especially in the final pressing at higher pressures, which is a particularly important application of the device according to the invention and the corresponding method.

In Fig. 2 ist im Schnitt eine Matrize 1 samt Pressstempel 5 dargestellt. Die Matrize 1 weist einen Grundkörper 2 auf, in den eine zweiteilige Matrizenhülse 3 eingesetzt ist. Die Matrizenhülse 3 besteht aus den beiden hohlzylindrisch ausgebildeten Teilen 6 und 7. Während das Teil 6 fest im Grundkörper 2 festgelegt ist, ist das andere Teil 7 der Matrizenhülse 3 in Pressrichtung P verschieblich gelagert.In Fig. 2 On average, a die 1 together with a ram 5 is shown. The die 1 has a base body 2, in which a two-part die sleeve 3 is inserted. The die sleeve 3 consists of the two hollow cylindrical parts 6 and 7. While the part 6 is firmly fixed in the base body 2, the other part 7 of the die sleeve 3 is mounted displaceably in the pressing direction P.

Die beiden Teile 6 und 7 der Matrizenhülse 3 besitzen radial nach innen weisende Formflächen 4, die die Außenkontur des zu formenden Presslings definieren. Die Form des Presslings wird weiter durch eine stirnseitig am beweglichen Teil 7 der Matrizenhülse 3 angeordnete Platte 12 bestimmt. Ferner ergibt sich dessen Form durch den von unten in die Matrizenhülse 3 einzuschiebenden Pressstempel 5.The two parts 6 and 7 of the die sleeve 3 have radially inwardly facing forming surfaces 4, which define the outer contour of the compact to be formed. The shape of the compact is further determined by a plate 12 arranged on the front side on the movable part 7 of the die sleeve 3. Furthermore, its shape results from the press die 5 to be inserted from below into the die sleeve 3.

Der Pressstempel 5 besteht im Ausführungsbeispiel aus mehreren konzentrisch angeordneten Hülsen 13, 13', 13", ..., aus deren axialer Relativlage sich entsprechend die Form des Presslings ergibt. Die Hülsen 13, 13', 13", ... sind konzentrisch zu einer Stange 14 angeordnet. Der Presstempel 5 wird dabei von einem nicht dargestellten Bewegungselement mit der Presskraft FP beaufschlagt.In the exemplary embodiment, the press ram 5 consists of a plurality of concentrically arranged sleeves 13, 13 ', 13 ", ..., from whose axial relative position the shape of the compact results correspondingly. [... Die] The sleeves 13, 13', 13", ... are concentric arranged to a rod 14. The ram 5 is acted upon by a non-illustrated movement element with the pressing force F P.

In der linken Bildhälfte ist in Fig. 2 das nach oben gefahrene Teil 7 der Matrizenhülse 3 gezeigt, während in der rechten Bildhälfte das Teil 7 nach unten bewegt ist.In the left half of the picture is in Fig. 2 the raised part 7 of the die sleeve 3 is shown, while in the right half of the picture the part 7 is moved downwards.

Wie weiter zu sehen ist, umgibt das verschiebbare Teil 7 der Matrizenhülse 3 mit einer zylindrischen Innenfläche 10 die zylindrische Außenfläche 9 des ortsfest in der Matrizenhülse 3 angeordneten Teils 6. Beide zusammenwirkenden Flächen 9, 10 sind dabei so toleriert, dass eine Verschieblichkeit beider Teile 6, 7 möglich ist, wobei dennoch nur ein möglichst geringer Spalt zwischen beiden Teilen vorliegt.As can also be seen, the displaceable part 7 of the die sleeve 3 with a cylindrical inner surface 10 surrounds the cylindrical outer surface 9 of the part 6 stationarily arranged in the die sleeve 3. Both cooperating surfaces 9, 10 are tolerated so that a displaceability of both parts 6 , 7 is possible, yet there is only the smallest possible gap between the two parts.

Die Bewegung des verschieblichen Teils 7 der Matrizenhülse 3 relativ zum ortsfest angeordnetem Teil 6 erfolgt mit Mitteln 8, die als hydraulisches Kolben-Zylinder-System ausgeführt sind. Hierzu ist in den Grundkörper 2 der Matrize 1 eine Ringnut 11 eingearbeitet, die als Zylinder für einen eingesetzten Ringkolben 16 dient. Der Zylinder 11 steht mit zwei Fluidleitungen 17 und 18 in Verbindung, über die geregelt bzw. gesteuert Hydrauliköl in den Zylinderraum eingegeben werden kann, um den Kolben 16 gesteuert bzw. geregelt in eine gewünschte Relativlage zum Zylinder 11 zu bewegen, wodurch das Teil 7 entsprechend positioniert wird.The movement of the displaceable part 7 of the die sleeve 3 relative to the stationarily arranged part 6 takes place by means 8, which are designed as a hydraulic piston-cylinder system. For this purpose, an annular groove 11 is incorporated in the base body 2 of the die 1, which serves as a cylinder for an inserted annular piston 16. The cylinder 11 communicates with two fluid lines 17 and 18, via which controlled or controlled hydraulic oil can be entered into the cylinder chamber to the piston 16 controlled or to move in a desired relative position to the cylinder 11, whereby the part 7 accordingly is positioned.

Der maximale Verschiebeweg des Teils 7 relativ zum Teil 6 der Matrizenhülse 3 ist mit x angegeben.The maximum displacement of the part 7 relative to the part 6 of the die sleeve 3 is indicated by x.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Matrizedie
22
Grundkörperbody
33
Matrizenhülsedie sleeve
44
Formflächeform surface
55
Pressstempelpress die
66
erstes Teil der Matrizenhülse (ortsfest)first part of the matrix sleeve (stationary)
77
zweites Teil der Matrizenhülse (verschiebbar)second part of the die sleeve (movable)
88th
Bewegungsmittel (Kolben-Zylinder-System)Moving means (piston-cylinder-system)
99
zylindrische Außenflächecylindrical outer surface
1010
zylindrische Innenflächecylindrical inner surface
1111
Zylindercylinder
1212
Platteplate
13, 13', 13"13, 13 ', 13 "
Pressstempel-TeilePress die parts
1414
Stangepole
1515
Pulverpowder
1616
Ringkolbenannular piston
1717
Fluidleitungfluid line
1818
Fluidleitungfluid line
PP
Pressrichtungpressing direction
FP F P
Presskraftpressing force
xx
Verschiebewegdisplacement

Claims (8)

  1. A device for producing a moulded part from powder, in particular a metal powder, from a powder containing a pasty material, from a powder containing a pourable material or from a pre-pressed material, which has
    - a die (1), which consists of a base body (2) and a die bush (3) inserted therein, that has at least two hollow cylindrical parts (6, 7) arranged concentrically with respect to one another and forms a moulding surface (4) for the moulded part,
    - at least one extrusion die (5) that is capable of entering into an opening defined through the die bush (3) in an extrusion direction (P) and can seal material located in the die bush (3), and
    - wherein means (8) are provided with which the at least two parts (6, 7) of the die bush (3) are displaceable relative to one another in the direction of extrusion (P),
    characterised in that
    the at least two parts (6, 7) of the die bush (3) have moulding surfaces (4) that are directed radially inward and that define the external contour of the blank to be moulded, wherein the part (6) is arranged in a locationally fixed manner in the base body (2) and within the part (7) that is displaceable in the direction of extrusion (P).
  2. The device as specified in claim 1,
    characterised in that
    the part (6) that is arranged in a locationally fixed manner in the base body (2) abuts with a part of its cylindrical exterior surface (9) the cylindrical interior surface (10) of the displaceably arranged part (7).
  3. The device as specified in claim 1 or claim 2,
    characterised in that
    the means (8) for displacing the at least one part (7) of the die bush (3) is formed as a hydraulic piston cylinder system.
  4. The device as specified in claim 3,
    characterised in that
    the cylinder (11) of the piston cylinder system is designed as an annular groove in the base body (2) of the die (1).
  5. The device as specified in any one of claims 1 to 4,
    characterised in that
    the one end of the die bush (3) is closed with a plate (12) .
  6. The device as specified in claim 5,
    characterised in that
    the plate (12) is located on the displaceably arranged part (7) of the die bush (3).
  7. The device as specified in any one of claims 1 to 6,
    characterised in that
    the extrusion die (5) consists of a plurality of concentrically arranged, hollow cylindrical parts (13, 13', 13").
  8. The device as specified in claim 7,
    characterised in that
    the extrusion die (5) has a centrally arranged rod (14).
EP06008152A 2005-06-11 2006-04-20 Apparatus to produce a variety of formed parts of powder. Not-in-force EP1731246B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06008152T PL1731246T3 (en) 2005-06-11 2006-04-20 Apparatus to produce a variety of formed parts of powder.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005027032A DE102005027032B4 (en) 2005-06-11 2005-06-11 Device for producing a molded part

Publications (2)

Publication Number Publication Date
EP1731246A1 EP1731246A1 (en) 2006-12-13
EP1731246B1 true EP1731246B1 (en) 2009-09-16

Family

ID=36601210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06008152A Not-in-force EP1731246B1 (en) 2005-06-11 2006-04-20 Apparatus to produce a variety of formed parts of powder.

Country Status (8)

Country Link
US (1) US7553145B2 (en)
EP (1) EP1731246B1 (en)
JP (1) JP4621632B2 (en)
AT (1) ATE442926T1 (en)
CA (1) CA2550095A1 (en)
DE (2) DE102005027032B4 (en)
ES (1) ES2330771T3 (en)
PL (1) PL1731246T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT515961B1 (en) * 2014-06-18 2017-04-15 Miba Sinter Austria Gmbh Method and device for pressing a green compact
DE102017114455B3 (en) * 2017-06-29 2018-10-31 Gkn Sinter Metals Engineering Gmbh Plane plate of a press tool
CN107932971B (en) * 2017-12-22 2023-05-26 山西贵友自动化设备有限公司 Pressing production system for extrusion molding product

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JPS59107002A (en) * 1982-12-11 1984-06-21 Toyota Motor Corp Production of sintered parts
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Also Published As

Publication number Publication date
DE102005027032B4 (en) 2007-06-28
PL1731246T3 (en) 2010-02-26
JP4621632B2 (en) 2011-01-26
US20060286194A1 (en) 2006-12-21
JP2006346749A (en) 2006-12-28
US7553145B2 (en) 2009-06-30
CA2550095A1 (en) 2006-12-11
DE502006004836D1 (en) 2009-10-29
ES2330771T3 (en) 2009-12-15
DE102005027032A1 (en) 2006-12-28
ATE442926T1 (en) 2009-10-15
EP1731246A1 (en) 2006-12-13

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