EP1731246A1 - 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
EP1731246A1
EP1731246A1 EP06008152A EP06008152A EP1731246A1 EP 1731246 A1 EP1731246 A1 EP 1731246A1 EP 06008152 A EP06008152 A EP 06008152A EP 06008152 A EP06008152 A EP 06008152A EP 1731246 A1 EP1731246 A1 EP 1731246A1
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EP
European Patent Office
Prior art keywords
die sleeve
die
parts
powder
base body
Prior art date
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Granted
Application number
EP06008152A
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German (de)
French (fr)
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EP1731246B1 (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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Priority to PL06008152T priority Critical patent/PL1731246T3/en
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 a device for producing a molded part from powder, in particular from metal powder, from a dough containing a powdery material, from a powder containing flowable material or from prepressed material comprising a die consisting of a base body and a in this Matrizenhülse used, wherein the Matrizenhülse forms at least one molding surface for the molding, and at least one ram, which can enter into an opening defined by the Matrizenhülse in a pressing direction and can compact material located in the Matrizenhülse.
  • a plurality of punches are used, which can move in an axial direction.
  • the stamps can be in an axial Submerge mold closed on one side or come from both axial directions in an axially open in both directions die. 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 include two matrices whose end faces include the contour of the molding, by means of guides at an angle, the surfaces of the end faces of the dies close to each other when reaching the final contour of the molding.
  • the invention is therefore the object of a device of the type mentioned in such a way that it is possible to create an additional press axis in the device, a very compact design should be possible, which is possibly also suitable to convert existing devices ,
  • the die sleeve is formed at least two parts, wherein means are provided, with which the at least two parts of the die sleeve in the pressing direction relative to each other are displaceable.
  • the die sleeve itself is thus designed so that it has a movement possibility with which powder can be put under pressure during pressing.
  • the at least two parts of the die sleeve are concentrically arranged, hollow cylindrical parts. It is preferably provided that one of the parts is arranged stationary in the base body and one of the parts is arranged displaceably in the pressing direction. Furthermore, it can be provided that the stationary part arranged in the base body abuts with a portion of its cylindrical outer surface on the cylindrical inner surface of the displaceably arranged part.
  • 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 concentrically arranged 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.
  • a device is shown schematically, 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 including punch 5 is shown in section.
  • 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, die eine Matrize aufweist, die aus einem Grundkörper und einer in diesen eingesetzten Matrizenhülse besteht, wobei die Matrizenhülse mindestens eine Formfläche für das Formteil bildet, und mindestens einen Pressstempel, der in eine durch die Matrizenhülse definierte Öffnung in eine Pressrichtung eintreten und sich in der Matrizenhülse befindliches Material verdichten kann.The invention relates to a device for producing a molded part from powder, in particular from metal powder, from a dough containing a powdery material, from a powder containing flowable material or from prepressed material comprising a die consisting of a base body and a in this Matrizenhülse used, wherein the Matrizenhülse forms at least one molding surface for the molding, and at least one ram, which can enter into an opening defined by the Matrizenhülse in a pressing direction and can compact material located in the Matrizenhülse.

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 stamps can be in an axial Submerge mold closed on one side or come from both axial directions in an axially open in both directions die. 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.

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 include two matrices whose end faces include the contour of the molding, by means of guides at an angle, the surfaces of the end faces of the dies close to each other when reaching the final contour of the molding.

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 pressing device with a die and several punches known, wherein a segment slider is used, by means of corresponding feed and retraction devices can also be moved 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 es möglich ist, eine zusätzliche Pressachse in der Vorrichtung zu schaffen, 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 it is possible to create an additional press axis in the device, a very compact design should be possible, which is possibly also suitable to convert existing devices ,

Diese Aufgabe wird durch die Erfindung dadurch gelöst, dass die Matrizenhülse mindestens zweiteilig ausgebildet ist, wobei Mittel vorgesehen sind, mit denen die mindestens zwei Teile der Matrizenhülse in Pressrichtung relativ zueinander verschiebbar sind.This object is achieved by the invention in that the die sleeve is formed at least two parts, wherein means are provided, with which the at least two parts of the die sleeve in the pressing direction relative to each other are displaceable.

Im Unterschied zu vorbekannten Lösungen wird also die Matrizenhülse selber so ausgeführt, dass sie eine Bewegungsmöglichkeit hat, mit der Pulver beim Pressen unter Druck gesetzt werden kann.In contrast to previously known solutions, the die sleeve itself is thus designed so that it has a movement possibility with which powder can be put under pressure during pressing.

Eine Fortbildung sieht vor, dass die mindestens zwei Teile der Matrizenhülse konzentrisch zueinander angeordnete, hohlzylindrisch ausgebildete Teile sind. Bevorzugt ist vorgesehen, dass eines der Teile ortsfest im Grundkörper angeordnet ist und eines der Teile in Pressrichtung verschieblich angeordnet ist. Ferner kann vorgesehen sein, dass das im Grundkörper ortsfest angeordnete Teil mit einem Abschnitt seiner zylindrischen Außenfläche an der zylindrischen Innenfläche des verschieblich angeordneten Teils anliegt.A further development provides that the at least two parts of the die sleeve are concentrically arranged, hollow cylindrical parts. It is preferably provided that one of the parts is arranged stationary in the base body and one of the parts is arranged displaceably in the pressing direction. Furthermore, it can be provided that the stationary part arranged in the base body abuts with a portion of its cylindrical outer surface on the cylindrical inner surface of the displaceably arranged part.

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 der vorzugsweise konzentrisch angeordneten hohlzylindrischen Teilen bestehen. Er kann eine zentral angeordnete Stange aufweisen.The pressing die may consist of a plurality of preferably concentrically arranged 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, a device is shown schematically, 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, a die 1 including punch 5 is shown in section. 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 figure, the part 7 of the die sleeve 3 moved upward is shown in FIG. 2, 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.

Während der Einsatz der erfindungsgemäßen Vorrichtung und des zugehörigen Verfahrens häufig bei Formkörpern angezeigt ist, die zumindest abschnittsweise einen zylindrischen Teil aufweisen, kommt die Erfindung genauso auch zur Anwendung, wenn dies nicht der Fall ist, d. h. wenn der Formkörper nicht zylindrisch ausgebildet ist, auch nicht abschnittsweise, und die Matrizenhülse folglich gleichermaßen keinen zylindrisch ausgebildeten Abschnitt hat.While the use of the device according to the invention and the associated method is frequently indicated in the case of shaped bodies which at least partially have a cylindrical part, the invention is equally applicable if this is not the case, ie if the shaped body is not cylindrical, either in sections, and the die sleeve consequently likewise does not have a cylindrically shaped section.

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 (10)

Vorrichtung zum Herstellen eines Formteils aus Pulver, insbesondere Metallpulver, aus einem ein Pulver enthaltenden, teigigen Material, aus einem ein Pulver enthaltenden, fließfähigen Material oder aus vorgepresstem Material, die aufweist: - eine Matrize (1), die aus einem Grundkörper (2) und einer in diesen eingesetzten Matrizenhülse (3) besteht, wobei die Matrizenhülse (3) mindestens eine Formfläche (4) für das Formteil bildet, und - mindestens einen Pressstempel (5), der in eine durch die Matrizenhülse (3) definierte Öffnung in eine Pressrichtung (P) eintreten und sich in der Matrizenhülse (3) befindliches Material verdichten kann, dadurch gekennzeichnet,
dass die Matrizenhülse (3) mindestens zweiteilig (6, 7) ausgebildet ist, wobei Mittel (8) vorgesehen sind, mit denen die mindestens zwei Teile (6, 7) der Matrizenhülse (3) in Pressrichtung (P) relativ zueinander verschiebbar sind.Device for producing a molded part from powder, in particular metal powder, from a doughy material containing a powder, from a powder-containing, flowable material or from pre-pressed material, which comprises: - A die (1), which consists of a base body (2) and a die sleeve (3) inserted therein, wherein the die sleeve (3) forms at least one molding surface (4) for the molding, and - At least one ram (5) which can enter into a defined by the die sleeve (3) opening in a pressing direction (P) and can be in the die sleeve (3) befindliches material, characterized,
in that the die sleeve (3) is formed at least in two parts (6, 7), with means (8) being provided with which the at least two parts (6, 7) of the die sleeve (3) are displaceable relative to one another in the pressing direction (P). Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
dass die mindestens zwei Teile (6, 7) der Matrizenhülse (3) konzentrisch zueinander angeordnete, hohlzylindrisch ausgebildete Teile sind.Device according to claim 1,
characterized,
in that the at least two parts (6, 7) of the die sleeve (3) are concentrically arranged, hollow cylindrical parts. Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
dass eines der Teile (6) ortsfest im Grundkörper (2) angeordnet ist und eines der Teile (7) in Pressrichtung (P) verschieblich angeordnet ist.Device according to claim 2,
characterized,
in that one of the parts (6) is arranged stationarily in the base body (2) and one of the parts (7) is displaceably arranged in the pressing direction (P). Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet,
dass das im Grundkörper (2) ortsfest angeordnete Teil (6) mit einem Teil seiner zylindrischen Außenfläche (9) an der zylindrischen Innenfläche (10) des verschieblich angeordneten Teils (7) anliegt.Device according to claim 3,
characterized,
in that the part (6) fixedly arranged in the base body (2) rests with a part of its cylindrical outer surface (9) against the cylindrical inner surface (10) of the displaceably arranged part (7). Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass die Mittel (8) zum Verschieben des mindestens einen Teils (7) der Matrizenhülse (3) als hydraulisches Kolben-Zylinder-System ausgebildet sind.Device according to one of claims 1 to 4,
characterized,
in that the means (8) for displacing the at least one part (7) of the die sleeve (3) are designed as a hydraulic piston-cylinder system. Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet,
dass der Zylinder (11) des Kolben-Zylinder-Systems als Ringnut im Grundkörper (2) der Matrize (1) ausgebildet ist.Device according to claim 5,
characterized,
that the cylinder (11) of the piston-cylinder system is designed as an annular groove in the base body (2) of the die (1). Vorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
dass das eine Ende der Matrizenhülse (3) mit einer Platte (12) abgeschlossen ist.Device according to one of claims 1 to 6,
characterized,
that one end of the die sleeve (3) is closed with a plate (12). Vorrichtung nach Anspruch 7,
dadurch gekennzeichnet,
dass die Platte (12) an dem verschiebbar angeordneten Teil (7) der Matrizenhülse (3) festgelegt ist.Device according to claim 7,
characterized,
in that the plate (12) is fixed to the displaceably arranged part (7) of the die sleeve (3). Vorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
dass der Pressstempel (5) aus mehreren konzentrisch angeordneten, hohlzylindrischen Teilen (13, 13', 13") besteht.Device according to one of claims 1 to 8,
characterized,
that the press stamp (5) arranged in a plurality of concentric hollow cylindrical parts (13, 13 ', 13 ") is composed. Vorrichtung nach Anspruch 9,
dadurch gekennzeichnet,
dass der Pressstempel (5) eine zentral angeordnete Stange (14) aufweist.Device according to claim 9,
characterized,
that the press punch (5) has a centrally located 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 true EP1731246A1 (en) 2006-12-13
EP1731246B1 EP1731246B1 (en) 2009-09-16

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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)

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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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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
EP1731246B1 (en) 2009-09-16
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

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