EP2479022A1 - Powder press - Google Patents

Abstract

The powder press has a die assembly that is provided with an intermediate link (41) and a die plate (42). The intermediate link is connected with two parallel drive units (9,10) work along a vertical axis. The die plate is connected with the intermediate link. The die plate is guided along a stroke direction or vertical direction at guiding units (5,6,7). A plunger arrangement has another intermediate link and a stamping plate.

Description

The invention relates to a powder press for producing a compact of a powdery material. Such a powder press has a frame, a punch assembly and a die assembly. The latter defines a mold cavity into which the powdered material can be filled, whereupon, to form the compact, the punch assembly and die assembly can be moved relative to one another along a press vertical axis and pressed against each other.

The drive of the die assembly or the punch assembly is usually via two mutually parallel to the vertical axis of the press acting drives, each with a servo motor. The two servomotors work in master-slave mode to ensure a largely synchronous movement of the two parallel drives along or parallel to the vertical axis.

It is extremely important that the movement of the two parallel drives is synchronous. Otherwise, misalignments could occur of displaceable and guided parts of the press along the press vertical axis. Depending on the design of the press, this relates to the die plate and / or the stamp plate, which are guided along a plurality of mutually parallel vertical guides. If a greater difference between their travel paths would occur between the two drives parallel to one another, the tool mounted on the die plate and / or on the stamp plate could be damaged. In the worst case, even the vertical guides of the die plate and / or the stamp plate and the drives can be damaged.

To prevent this, various measures in the field of software and electrical hardware are known and are used successfully. As a result, even in special modes and in special conditions of the press, such as immediate stop, emergency stop, power failure, etc., the drives are stopped in a controlled manner.

Nevertheless, a small residual risk remains. If e.g. If the communication connection between the two drive controllers required for master-slave operation is cut off, there is a risk that the two servomotors will no longer work synchronously. In the worst case, the two servomotors would work against each other until they stopped. This would most likely lead to considerable damage to the tool and possibly to the press.

The invention has for its object to largely eliminate this residual risk.

1. a) die Matrizenanordnung ein mit zwei parallel entlang der Vertikalachse Z-Z wirkenden Antriebsmitteln verbundenes Zwischenglied und eine an Führungsmitteln entlang der Hubrichtung bzw. Vertikalachse Z-Z geführte und mit dem Zwischenglied verbundene Matrizenplatte aufweist; und/oder a') die Stempelanordnung ein mit parallel entlang der Vertikalachse Z-Z wirkenden Antriebsmitteln verbundenes weiteres Zwischenglied und eine an Führungsmitteln entlang der Hubrichtung bzw. Vertikalachse Z-Z geführte und mit dem Zwischenglied verbundene Stempelplatte aufweist;
2. b) das Zwischenglied mit einem ersten Antriebsmittel mittels eines ersten flexiblen Verbindungsmittels verbunden ist und mit einem zweiten Antriebsmittel mittels eines zweiten flexiblen Verbindungsmittels verbunden ist, wobei das erste Verbindungsmittel sowie das zweite Verbindungsmittel auf einer zur Pressen-Vertikalachse Z-Z orthogonalen ersten Geraden X-X angeordnet sind; und
3. c) das Zwischenglied und die Matrizenplatte bzw. das weitere Zwischenglied und die Stempelplatte mittels eines dritten flexiblen Verbindungsmittels miteinander verbunden sind, das auf einer zur Pressen-Hubrichtung bzw. Vertikalachse Z-Z orthogonalen und zur ersten Geraden X-X orthogonalen zweiten Geraden Y-Y äquidistant zu dem ersten flexiblen Verbindungsmittel und dem zweiten flexiblen Verbindungsmittel derart angeordnet ist, dass die durch das dritte flexible Verbindungsmittel übertragene resultierende Zugkraft oder Schubkraft in einem Punkt auf einer durch den Schwerpunkt der Matrizenplatte bzw. der Stempelplatte verlaufenden vertikalen Geraden in die Matrizenplatte bzw. in die Stempelplatte eingeleitet wird.

This object is achieved by means of a powder press for producing a compact of a powdery material, with a frame, a punch assembly and a die assembly defining a mold cavity into which the powdered material is fillable and thereafter for forming the compact the punch assembly and the die assembly along a press vertical axis ZZ are movable relative to each other and pressed against each other, according to the invention

1. a) the die assembly has an associated with two parallel along the vertical axis ZZ drive means connected intermediate member and guided on guide means along the lifting direction or vertical axis ZZ and connected to the intermediate plate die plate; and / or a ') the punch arrangement has a further intermediate member connected to drive means acting parallel along the vertical axis ZZ and a stamp plate guided on guide means along the stroke direction or vertical axis ZZ and connected to the intermediate member;
2. b) the intermediate member is connected to a first drive means by means of a first flexible connection means and is connected to a second drive means by means of a second flexible connection means, wherein the first connection means and the second connection means are arranged on a first straight line XX orthogonal to the press vertical axis ZZ; and
3. c) the intermediate member and the die plate or the further intermediate member and the punch plate are interconnected by means of a third flexible connecting means, which on a press-lifting direction or Vertical axis ZZ orthogonal and orthogonal to the first straight line XX second straight line YY is arranged equidistant to the first flexible connection means and the second flexible connection means such that the resultant by the third flexible connection means resulting tensile force or thrust force at a point on one of the center of gravity of the die plate and the stamp plate extending vertical straight lines in the die plate or in the die plate is initiated.

It is particularly advantageous if the introduction of force takes place practically only in the vertical direction by the third flexible connection means in the center of gravity of the die plate or the stamp plate.

This construction according to the invention ensures that even with a difference between the travel path of the first drive means extending along the press stroke axis ZZ (eg vertical direction) and the second drive means acting in parallel therewith, the tractive force or thrust force with a very low tilting moment or practically is entered without tilting moment in the die plate or in the stamp plate.

In the case of the powder press according to the invention, the introduction of force from the two parallel drives into the die plate and / or into the die plate takes place via a die plate intermediate member into the die plate and / or via a stamp plate intermediate member into the die plate, depending on the structure of the press. The two parallel drives, the die plate and / or the stamp plate are rigid structures, which due to their geometry, such as. relatively thick formation of the plate, stiffening ribs on the plate, etc., as well as due to the plate material, e.g. Steel, experienced under load only a small deformation.

In contrast, the flexible connecting means, on the one hand between each of the two drives and the intermediate member are arranged and on the other hand between an intermediate member (die plate intermediate member) and the die plate and / or between an intermediate member (stamp plate intermediate member) and the die plate are arranged, a deformation, in particular a bending of the flexible connection means.

Thereby, a difference between the travel of the first drive and the second drive parallel thereto along the press stroke axis Z-Z (e.g., vertical direction) can be transmitted to the link while deforming the first flexible connection means and the second flexible connection means. In this case, the intermediate member is tilted about an axis of rotation which extends on the one hand orthogonal to the first straight line X-X, which extends through the first flexible connection means and through the second flexible connection means, and on the other hand extends orthogonal to the stroke direction Z-Z.

The axis of rotation or tilt axis of the intermediate member extends parallel to the second straight line Y-Y, on which the third flexible connection means is arranged equidistant from the first flexible connection means and the second flexible connection means. The case of the intermediate member via the third flexible connection means on the die plate or on the stamp plate transmitted tilting moment is much smaller than the overturning moment that would be transmitted to the die plate or on the stamp plate, if the two drives with a travel difference directly on would act on the die plate or on the stamp plate.

As a result, misalignments along a plurality of mutually parallel guides guided die plate and / or stamp plate are significantly reduced, causing damage to the tool or the guides of the die plate and / or the stamp plate and the drives are effectively prevented.

The line XX can be defined as the straight line along which the two drives are arranged, or more precisely, the straight line on which the points of contact of the first flexible connection means and the second flexible connection means lie with the intermediate member. The straight line YY orthogonal to the line XX can be defined as the straight line on which or along which the third line is arranged flexible connecting means, or more precisely, the straight line on which lie the points of contact of the third flexible connection means with the die plate and with the stamp plate.

Preferably, the positions of the first straight line X-X, the second straight line Y-Y and the tilting axis of the intermediate link parallel thereto in the Z direction are identical or nearly identical. The Z-position of the link tilt axis is typically, but not necessarily, between the Z position of the line X-X and the Z position of the line Y-Y. This measure has the effect that, when the intermediate member is tilted in response to a travel distance difference between the two drives, the third flexible connection means is practically not moved away from its equidistant position between the first flexible connection means and the second flexible connection means. Expediently, the straight line Y-Y with the third flexible connecting means and the tilting axis are arranged within a relatively small bandwidth of the Z position along the lifting axis Z-Z about the Z position of the straight line X-X. Preferably, this bandwidth is ΔZ, i. this Z-interval is less than half, more preferably less than a quarter, of the X-distance between the first flexible connection means and the second flexible connection means along the line X-X.

Preferably, the first flexible connecting means has a first flexible connecting member attached to the first driving means and to the intermediate member, and the second flexible connecting means has a second flexible connecting member fixed to the second driving means and to the intermediate member.

These links may be pin-shaped, conveniently having a small dimension D (e.g., pin cross-section diameter or pin cross-section diagonal) across the Z-direction and a large dimension L (length) along the Z-direction.

The connecting members may also be formed like a sheet, wherein they expediently a small dimension D (eg sheet thickness) transverse to the Z-direction and have a large dimension L (length) along the Z-direction.

Depending on the nature of the material (steel, elastomer or composite material containing these materials), the links have an L / D ratio in the range of 4: 1 to 15: 1. The transverse dimension D of the pin-like or sheet-like links is preferably in the range of 1/20 to 1/8 of the X-distance between the first flexible link and the second flexible link along the line X-X. In the sheet-like flexible links, their smallest dimension (thickness D) in the X-direction, while their dimension in the Y-direction (width B) can be much larger and even greater than the dimension (length D) in the Z -Direction. As a result, the sheet-like links in the transverse direction X are very flexible, while they have virtually no flexibility in the transverse direction Y and in the longitudinal direction Z.

In a first variant, the third flexible connecting means also has a third flexible connecting member fixed to the intermediate member and to the die plate or to the stamp plate, which is fastened to the intermediate member at a central intermediate attachment location 0/0 / Z1 lying on the vertical axis ZZ , and which is attached to the die plate or on the stamp plate on a lying on the vertical axis ZZ plate mounting location 0/0 / Z2. Preferably, this plate mounting location is close to the center of gravity of the die plate or the stamp plate. This first variant of the arrangement of the third flexible connection means forms a "single-point flexi-storage / suspension" and based on the typically symmetrical shape of the die plate or the stamp plate a "central flexi-storage / suspension".

In this one-point centralized flexi-storage / suspension, the plate mounting location 0/0 / Z2 for the die plate or die plate is preferably approximately or completely equidistant from the Z-directional plate guides. With this measure, an in the die plate and / or stamp plate registered tilting moment further minimized or eliminated altogether.

In the case of a die plate or die plate which is guided on three vertical parallel guides which traverse a horizontal sectional plane at the corners of an imaginary equilateral triangle, this support / suspension is preferably under, in or above the center of gravity of this imaginary triangle. Conveniently, in this case, the die plate or stamp plate also has the symmetry of this equilateral triangle, so that the center of gravity (center of mass) of the plate coincides with the center of gravity of the imaginary triangle.

In the case of a die plate or die plate, which is guided on four vertical parallel guides (typical design), which traverse a horizontal cutting plane at the corners of an imaginary square, this storage / suspension is preferably below, in or above the center of gravity of this imaginary square. Conveniently, also in this case, the die plate or stamp plate also has the symmetry of this equilateral square, so that the center of gravity (center of mass) of the plate coincides with the center of gravity of the imaginary square.

In the more general case of a die plate or die plate guided on N vertical parallel guides traversing a horizontal cutting plane at the corners of an imaginary regular N-corner, this support / suspension is preferably under, in or above the center of gravity of this imaginary regular N -Ecks. Conveniently, also in this case, the die plate or stamp plate also has the symmetry of this regular N-corner, so that the center of gravity (center of mass) of the plate coincides with the center of gravity of the regular N-corner.

In a second variant, the third flexible connecting means also has a third flexible connecting member fixed to the intermediate member and to the die plate or to the stamp plate and fourth flexible link, which are fixed to the intermediate member at a first link mounting location 0 / Y4 / Z1 and at a second link mounting location 0 / Y5 / Z1 and which on the die plate and on the stamp plate at a first plate mounting location 0th / Y4 / Z2 or at a second plate mounting location 0 / Y5 / Z2 are fixed, wherein the intermediate member mounting locations 0 / Y4 / Z1 and 0 / Y5 / Z1 lie on a first straight line orthogonal to the vertical axis ZZ and wherein the plate Mounting locations 0 / Y4 / Z2 and 0 / Y5 / Z2 lie on a vertical axis ZZ orthogonal and parallel to the first straight second straight line. Preferably, these plate mounting locations are close to the center of gravity of the die plate, ie the second straight line with the plate mounting locations is close to the center of gravity of the plate or through the plate center of gravity. This second variant of the arrangement of the third flexible connection means forms a "multipoint flexi-storage / suspension" with decentralized, linearly distributed storage / suspension points.

This second variant is suitable for die plates or stamp plates, which is guided on four vertical parallel guides (typical design), which traverse a horizontal cutting plane at the corners of an imaginary square or rectangle. In this case, this rectilinearly distributed mounting / suspension preferably runs parallel below, congruent with or above a symmetry aisle running through the center of gravity of this imaginary square or rectangle. Conveniently, also in this case, the die plate or stamp plate also has the symmetry of this square or rectangle, so that the center of gravity or the symmetry of the plate coincides with the center of gravity or symmetry of the imaginary square or rectangle.

The flexible connection means are preferably rigid in the direction of the force transmission during a pressing operation, ie along the stroke axis ZZ, while they are flexible in a direction orthogonal to the stroke axis ZZ. As a result, during the pressing process, the forces acting along the lifting axis ZZ can be transmitted from the two drives via the first flexible one Connecting means and the second flexible connection means on the intermediate member and from this via the third flexible connection means (variant 1: one-point flexi storage / suspension, or variant 2: multipoint flexi storage / suspension) are transmitted to the die plate or on the stamp plate , This mechanical power train along the lifting axis ZZ is very rigid, while the flexibility of the connecting means on both sides of the preferably rigid intermediate member allows tilting of the intermediate member, whereby a travel distance difference between the two drives is compensated and kept away from the die plate or the stamp plate.

In an advantageous embodiment of the powder press one or both of the flexible connecting members between the drives and the intermediate member are each formed by a parallel to the vertical axis ZZ elastically stretched pin-like or sheet-like member extending through a respective through hole of the intermediate member, wherein a first end of the respective pin-like or sheet-like member is connected to a respective drive means and a second end of the respective pin-like or sheet-like member is connected to the intermediate member.

Preferably, one or both of the flexible connection members are each a screw / spacer unit whose respective spacers are clamped between the facing sides of the respective drive means and the intermediate member by means of the respective screw, the respective screw extending through the respective through hole of the intermediate member and is surrounded by the respective spacer ring-like or sleeve-like, wherein preferably a first end of the respective screw is screwed into a threaded bore of the respective drive means and formed as a screw head second end of the respective screw rests against the intermediate member in the region of the through hole.

The spacer may be designed differently, such as sleeve-like, in particular as a sleeve or as a spiral spring, or ring-like, in particular as a flat annular disk or as a plate spring (truncated cone). Preferably, the spacer has at its two ends, by means of which it bears against the respective drive means and bears against the intermediate member, each having a flange-like end-side abutment surface.

The sleeve-type spacer and the disc spring are preferably made of a high modulus material, such as, e.g. Stole. The planar annular disc may be made of a high modulus material, e.g. Steel, or a low modulus material, e.g. Elastomer consist.

The function of the spacer and the flexibility can be achieved by combining the aforementioned annular and sleeve-like spacers by a certain combination of such spacers placed over the threaded portion of the screw, stacked thereon and finally compressed by screwing the screw and thus biased. Thus, one can adjust the hardness and thereby the flexibility of the resulting composite spacer (composite spacer) by both the nature of the combination and the extent of compression of the one or more spacers.

Alternatively or additionally, one or both of the flexible links may each be formed by a spring leaf unit whose respective spring leaf, which is a sheet-like spacer, extends in a plane orthogonal to the first straight line XX, with a first end of the respective spring leaf having the respective one Drive means eg is firmly connected by a first clamping member unit and a second end of the respective spring leaf with the intermediate member, e.g. is firmly connected by a second clamping member unit.

The first clamping member unit and the second clamping member unit preferably each contain two clamping strips, which can be fixed to the drive means or on the intermediate member, for example by screws, whereby in each case a clamping gap for receiving one of the two edges of the spring leaf is formed. Between the two terminal strips one of the two edges of the spring leaf is clamped. Preferably, this is Through holes in the two terminal strips and provided in the spring leaf to be clamped, which come into coincidence when inserted in the nip spring leaf with each other and can be fixed by means of a through these through holes extending screw / nut arrangement. As a result, the spring leaf sits frictionally and positively in the nip between the two terminal strips firmly.

Again, the function of the spacer and the flexibility can be achieved by combining the mentioned sheet-like spacers or spring leaves by a certain combination of such spacers or spring leaves are fixed to each other as described above in the nip. Thus, one can also adjust the hardness and thereby the flexibility of the resulting composite spring leaf spacer (composite spacer) by the nature of the combination of the plurality of parallel spring leaf spacers.

In a further advantageous embodiment of the powder press one or both of the flexible connecting members are mounted spherically at least at one of their ends. This results in addition to the achieved by the flexibility of the links movement possibilities of the intermediate member with respect to the drive means and the die plate or stamp plate further movement possibility by a relative movement between two adjacent spherical surface sections in the spherical bearing. It is particularly advantageous if the spherical bearing is coupled to an elastic return means, which holds the intermediate member in a non-tilted position in its neutral torque-free position.

Alternatively or additionally, one or both of the flexible connecting members may be mounted cylindrically at least at one of their ends, the cylinder axis or axis of rotation of the bearing extending parallel to the straight line YY. This results in addition to the achieved by the flexibility of the connecting elements movement possibilities of the intermediate member with respect to the drive means and the die plate or stamp plate further movement possibility by a relative movement between two adjacent cylindrical surface sections in the cylindrical bearing. It is also particularly advantageous if the cylindrical bearing is coupled with an elastic return means, which holds the intermediate member in a non-tilted position in its neutral torque-free position.

While the spherical bearing allows two spatial degrees of freedom of link relative motion with respect to the drive means, with respect to the link, or with respect to the die plate or die plate, the cylindrical bearing permits only a degree of spatial freedom of such link relative movement. The cylindrical bearing is therefore particularly well in combination with a sheet-like flexible link.

Similar to the first flexible connecting means (eg with a first flexible connecting member) and the second flexible connecting means (eg a second flexible connecting member) applies mutatis mutandis to the third flexible connecting means (eg with a third flexible connecting member according to a first arrangement or eg with a third and a fourth flexible connecting member according to a second arrangement).

In an advantageous embodiment of the powder press, the one or two other flexible connecting members are each formed by a parallel to the vertical axis ZZ elastically tensioned pin-like or sheet-like member which extends through a respective through hole of the die plate or on the die plate, wherein a first end the respective pin-like or sheet-like member is connected to the intermediate member and a second end of the respective pin-like or sheet-like member is connected to the die plate or to the die plate.

Preferably, the one or two other flexible connecting members are each a screw / spacer / unit, whose respective spacers between the mutually facing sides of the die plate or the stamp plate and the intermediate member by means of each screw is clamped, wherein the respective screw extends through the respective through hole of the die plate or the stamp plate and is surrounded by the respective spacer ring-like or sleeve-like, preferably a first end of the respective screw is screwed into a threaded bore of the intermediate member and a formed as a screw head second end of the respective screw on the die plate or on the stamp plate in the region of the through hole.

Again, the spacer may be formed differently, e.g. sleeve-like, in particular as a sleeve or as a spiral spring, or like a ring, in particular as a flat annular disk or as a plate spring (truncated cone). Preferably, the spacer has at its two ends, by means of which it bears against the respective drive means and bears against the intermediate member, each having a flange-like end-side abutment surface.

The sleeve-like spacer and disc spring are also preferably made of a high modulus material, such as, e.g. Steel, while the planar annular disc is made of a high modulus material, e.g. Steel, or a low modulus material, e.g. Elastomer, can exist.

Again, the function of the spacer and the flexibility can be achieved by combining the aforementioned annular and sleeve-like spacers by a certain combination of such spacers placed over the threaded portion of the screw, stacked thereon and finally compressed by screwing the screw and thus biased. Thus, one can also adjust the hardness and thereby the flexibility of the resulting composite spacer (composite spacer) by both the nature of the combination and the extent of compression of the one or more spacers.

Alternatively or additionally, the one or the other further flexible connecting members can each by a leaf spring / clamping member unit be formed, the respective spring leaf, which is a sheet-like spacer, extending in a direction orthogonal to the first straight line XX, wherein a first end of the respective spring leaf with the intermediate member by means of a first clamping member unit is fixedly connected and a second end of the respective spring leaf is firmly connected to the die plate or to the stamp plate by means of a second clamping member unit.

Again, the first clamping member unit and the second clamping member unit preferably each comprise two clamping strips, which at the drive means or at the intermediate member, for example. can be fixed by screws, whereby in each case a clamping gap for receiving one of the two edges of the spring leaf is formed. Between the two terminal strips one of the two edges of the spring leaf is clamped. Again, preferably through holes in the two terminal strips and in the clamped spring leaf are provided for this purpose, which come into coincidence with one another in the nip inserted spring leaf and can be fixed by means of a through these through holes extending screw / nut arrangement. As a result, the spring leaf is stuck here also frictionally and positively in the nip between the two terminal strips.

Again, the function of the spacer and the flexibility can be achieved by combining the mentioned sheet-like spacers or spring leaves by a certain combination of such spacers or spring leaves are fixed to each other as described above in the nip. Thus, one can also adjust the hardness and thereby the flexibility of the resulting composite spring leaf spacer (composite spacer) by the nature of the combination of the plurality of parallel spring leaf spacers.

In a further advantageous embodiment of the powder press, the one or both further flexible connecting members are mounted spherically at least at one of their ends. This results in addition to the achieved by the flexibility of the links movement possibilities of the intermediate member with respect to the drive means and the Matrizenplatte or stamp plate a further possibility of movement by a relative movement between the two adjacent spherical surface sections in the spherical bearing. Again, it is particularly advantageous if the spherical bearing is coupled with an elastic return means, which holds the intermediate member in a non-tilted position in its neutral torque-free position.

Alternatively or additionally, the one or the other further flexible connecting members can here also be mounted cylindrically at least at one of their ends, the cylinder axis or axis of rotation of the bearing extending parallel to the straight line Y-Y. As a result, in addition to the possibilities of movement of the intermediate element with respect to the drive means and the die plate or die plate, which is achieved by the flexibility of the connecting elements, there is also a further possibility of movement due to a relative movement between two adjoining cylindrical surface sections in the cylindrical bearing. It is also particularly advantageous if the cylindrical bearing is coupled with an elastic return means, which holds the intermediate member in a non-tilted position in its neutral torque-free position. The cylindrical bearing is also particularly well suited in combination with a sheet-like flexible connecting member.

In a particularly advantageous embodiment of the powder press, the stiffness or the flexibility of the flexible connection means are adjustable. This adjustability of the flexibility is achieved by a combination of individual components of a respective flexible link, as described above with reference to the ring-like or sleeve-like flexible spacers or the sheet-like flexible spacers. Another adjustability is achieved by additionally one or both ends of one or more flexible connecting members is suspended spherically or cylindrically and is provided with an elastic return means, as also described above.

In the powder press, one or more of the flexible links may each have a pin-like member with a first pin end and a second pin end and a sleeve-like member surrounding the pin-like member at least along part of its length between the two pin ends and along part of its circumferential direction. In particular, the pin-like member and the sleeve-like member may have a conical region on their surfaces facing each other.

One or more of the flexible connecting members may be made of steel, wherein preferably also the intermediate piece and the die plate or stamp plate made of steel.

One or more of the flexible links may comprise a thin walled material having a wall thickness in the range of 2mm to 10mm, preferably 3mm to 6mm, the spacer and die plate preferably being a thick walled material having a plate thickness in the range of 20mm to 300mm.

One or more of the flexible links may be composed of a plurality of thin-walled layers of an elastic material, while the intermediate piece and the die plate consist of a one-piece block of material.

One or more of the flexible connecting members may be formed as a composite body having adjoining one another, extending along the longitudinal direction of the connecting member between the first end and the second end extending alternating layers of a polymer material or a metal material.

• Fig. 1 eine Perspektivansicht einer ersten Anordnung schematisch dargestellter erfindungsrelevanter Elemente einer erfindungsgemässen Pulverpresse;
• Fig. 2 eine Perspektivansicht einer zweiten Anordnung schematisch dargestellter erfindungsrelevanter Elemente einer erfindungsgemässen Pulverpresse;
• Fig. 3 eine Draufsicht entlang der Richtung Z-Z (siehe Fig. 2) der ausführlicher dargestellten Elemente der zweiten Anordnung gemäss einer ersten Ausführung (siehe Fig. 10A, Fig. 11A bzw. Fig. 10B, Fig. 11 B);
• Fig. 4 eine Seitenansicht in Richtung Y-Y (siehe Fig. 3) der entlang einer durch die Gerade X-X (siehe Fig. 3) verlaufenden vertikalen Ebene geschnittenen Elemente der zweiten Anordnung gemäss der ersten Ausführung;
• Fig. 5 eine Seitenansicht in Richtung X-X (siehe Fig. 3) der entlang einer durch die Gerade Y-Y (siehe Fig. 3) verlaufenden vertikalen Ebene geschnittenen Elemente der zweiten Anordnung gemäss der ersten Ausführung;
• Fig. 6 eine Perspektivansicht der entsprechend Fig. 4 geschnittenen Elemente;
• Fig. 7 eine Perspektivansicht der entsprechend Fig. 5 geschnittenen Elemente;
• Fig. 7A eine vergrösserte Darstellung des eingekreisten Abschnitts von Fig. 7;
• Fig. 8 eine Perspektivansicht der entsprechend Fig. 3 dargestellten Elemente;
• Fig. 9 eine perspektivische Explosionszeichnung der in Fig. 3 bis Fig. 8 dargestellten Elemente;
• Fig. 10A und Fig. 11A einen Vertikalschnitt eines ausführlicher dargestellten Verbindungsglieds gemäss einer ersten Variante der ersten Ausführung, das in einem ersten Bereich der Anordnung bzw. in einem zweiten Bereich der Anordnung eingebaut ist;
• Fig. 10B und Fig. 11B einen Vertikalschnitt eines ausführlicher dargestellten Verbindungsglieds gemäss einer zweiten Variante der ersten Ausführung, das in einem ersten Bereich der Anordnung bzw. in einem zweiten Bereich der Anordnung eingebaut ist;
• Fig. 10C und Fig. 11C einen Vertikalschnitt eines ausführlicher dargestellten Verbindungsglieds gemäss einer ersten Variante einer zweiten Ausführung, das in einem ersten Bereich der Anordnung bzw. in einem zweiten Bereich der Anordnung eingebaut ist;
• Fig. 10D und Fig. 11D einen Vertikalschnitt eines ausführlicher dargestellten Verbindungsglieds gemäss einer zweiten Variante einer zweiten Ausführung, das in einem ersten Bereich der Anordnung bzw. in einem zweiten Bereich der Anordnung eingebaut ist; und
• Fig. 12 eine der Fig. 3 ähnliche Draufsicht der ausführlicher dargestellten Elemente der zweiten Anordnung gemäss der zweiten Ausführung (siehe Fig. 10C, Fig. 11C bzw. Fig. 10D, Fig. 11D), wobei die jeweiligen Verbindungsglieder entlang einer horizontalen Ebene E-E geschnitten dargestellt sind.

Further advantages, features and possible applications of the invention will become apparent from the following non-limiting description of preferred embodiments of the invention with reference to the drawing. Show it:

• Fig. 1 a perspective view of a first arrangement of schematically illustrated inventive elements of a powder press according to the invention;
• Fig. 2 a perspective view of a second arrangement of schematically illustrated inventive elements of a powder press according to the invention;
• Fig. 3 a plan view along the direction ZZ (see Fig. 2 ) of the illustrated elements of the second arrangement according to a first embodiment (see Fig. 10A . Fig. 11A respectively. Fig. 10B . Fig. 11B) ;
• Fig. 4 a side view in the direction of YY (see Fig. 3 ) along a line XX (see Fig. 3 ) extending vertical plane cut elements of the second arrangement according to the first embodiment;
• Fig. 5 a side view in the direction of XX (see Fig. 3 ) along a straight line YY (see Fig. 3 ) extending vertical plane cut elements of the second arrangement according to the first embodiment;
• Fig. 6 a perspective view of the corresponding Fig. 4 cut elements;
• Fig. 7 a perspective view of the corresponding Fig. 5 cut elements;
• Fig. 7A an enlarged view of the circled section of Fig. 7 ;
• Fig. 8 a perspective view of the corresponding Fig. 3 represented elements;
• Fig. 9 an exploded perspective view of Fig. 3 to Fig. 8 represented elements;
• Fig. 10A and Fig. 11A a vertical section of a connector shown in more detail according to a first variant of the first embodiment, which is installed in a first region of the assembly or in a second region of the assembly;
• Fig. 10B and Fig. 11B a vertical section of a connector shown in more detail according to a second variant of the first embodiment, which is installed in a first region of the arrangement or in a second region of the assembly;
• Fig. 10C and Fig. 11C a vertical section of a connector shown in more detail according to a first variant of a second embodiment, which is installed in a first region of the arrangement or in a second region of the assembly;
• Fig. 10D and Fig. 11D a vertical section of a connector shown in more detail according to a second variant of a second embodiment, which is installed in a first region of the arrangement or in a second region of the arrangement; and
• Fig. 12 one of the Fig. 3 similar plan view of the detailed illustrated elements of the second arrangement according to the second embodiment (see Fig. 10C . Fig. 11C respectively. Fig. 10D . Fig. 11D ), wherein the respective connecting members are shown cut along a horizontal plane EE.

In Fig. 1 is a perspective view of a first arrangement of inventive elements 9, 10, 11, 12, 13, 41, 42 of a powder press according to the invention shown. Fig. 1 is a schematic representation for explaining the principle of operation of the invention.

The powder press includes a frame, a punch assembly, and a die assembly that defines a mold cavity into which the powdered material is fillable. These parts of the powder press are in Fig. 1 not shown. To form a compact of a powdery material, the punch assembly and the die assembly along the press vertical axis ZZ can be moved relative to each other and pressed against each other.

In the Fig. 1 The first arrangement shown essentially comprises a die assembly 4 with a die plate 42, a first drive means 9 and a second drive means 10 and an intermediate member 41. The die plate 42 is connected to guide means (in Fig. 1 not shown) guided along the stroke direction or vertical axis ZZ.

Between the first drive means 9 and the intermediate member 41, a first flexible connecting member 11 is arranged, which can transmit thrust forces and tensile forces along the stroke direction Z-Z between the first drive means 9 and the intermediate member 41. Between the second drive means 10 and the intermediate member 41, a second flexible connecting member 12 is also arranged, which can transmit shear forces and tensile forces along the stroke direction Z-Z between the second drive means 10 and the intermediate member 41. The two flexible connecting links 11 and 12 define a first straight line X-X. There could also be more than two such point-like flexible links along this line X-X.

Between the intermediate member 41 and the die plate 42, a third flexible connecting means 13 is arranged, which can transmit shear forces and tensile forces along the stroke direction ZZ between the intermediate member 41 and the die plate 42, the resulting force of the transmitted through the flexible connecting means 13 thrust forces and tensile forces practically torque-free along the stroke direction ZZ in the die plate 42 is initiated. The third flexible connecting means 13 is designed for this purpose as a third flexible connecting member 13, which at a location on the line Currently equidistant from the location of the first flexible connecting member 11 and the location of the second flexible connecting member 12 is arranged.

Defining the point of intersection of the line XX with the line ZZ as the origin (0/0/0) of a rectangular coordinate system (X / Y / Z), this third flexible link 13 is located at a location on the Z axis and is fixed to the link 41 at a pontic attachment location (0/0 / Z1) and fixed to the die plate 42 at a disc mounting location (0/0 / Z2). Therefore, the dimension of the third flexible link 13 in the Z direction is AZ = | Z2-Z1 |.

Measured in these coordinates, the first drive means 9 is fixed to the intermediate member 41 at a pontic attachment location (X1 / 0/0), and the second drive means 10 is fixed to the pontic 41 at a pontic attachment location (X2 / 0/0) these two intermediate link mounting locations are arranged symmetrically to the lifting axis ZZ, ie X2 = - X1.

The first arrangement described here represents a central, point-point, one-point flexi mounting of the die plate 42. The term "central" is understood to mean that the introduction of force into the die plate 42 takes place without torque via the third connection means 13, so that also the guides of the die plate 42 (see eg 5, 6, 7, 8 in Fig. 8 ) no torques are entered through the die plate 42.

In the Fig. 2 The second arrangement shown is similar in structure to the first arrangement of Fig. 1 and essentially comprises the die assembly 4 with the die plate 42, the first drive means 9 and the second drive means 10 and the intermediate member 41. The die plate 42 is also on guide means (in Fig. 1 not shown) guided along the stroke direction or vertical axis ZZ.

Between the first drive means 9 and the intermediate member 41, the first flexible connecting member 11 is arranged, the thrust forces and tensile forces along the stroke direction ZZ between the first drive means. 9 and the intermediate member 41 can transmit. Between the second drive means 10 and the intermediate member 41, the second flexible connecting member 12 is arranged, which can transmit shear forces and tensile forces along the stroke direction ZZ between the second drive means 10 and the intermediate member 41. The two flexible connecting links 11 and 12 also define the first straight line XX, and more than two such point-like flexible connecting links could also be arranged along this straight line XX.

Between the intermediate member 41 and the die plate 42, a third flexible connecting means 13 is also arranged, which can transmit shear forces and tensile forces along the lifting direction ZZ between the intermediate member 41 and the die plate 42, whereby also the resultant force of the shear forces transmitted by the flexible connecting means 13 and tensile forces virtually torque-free along the stroke direction ZZ in the die plate 42 is initiated. Unlike the in Fig. 1 In this second arrangement, the third flexible connecting means 13 is designed for this purpose as a third flexible connecting member 14 and fourth flexible connecting member 15, which are spaced from each other at symmetrical locations to the lifting axis ZZ on a second straight line YY orthogonal to the first straight line XX and orthogonal to the stroke axis ZZ- extends. The third link 14 and the fourth link 15 are respectively disposed at a location on the second straight line YY equidistant from the location of the first flexible link 11 and the location of the second flexible link 12, respectively.

Again, defining the intersection of the line XX with the line ZZ as the origin (0/0/0) of a rectangular coordinate system (X / Y / Z), the third flexible link 14 is at a first location on the Y axis and is fixed to the intermediate member 41 at a link attachment location (0 / Y4 / Z1) and fixed to the die plate 42 at a board mounting location (0 / Y4 / Z2), and the fourth flexible link 15 is at a second location on the Y-axis and is at a link attachment location (0 / Y5 / Z1) on the Intermediate member 41 attached and fixed to a plate mounting location (0 / Y5 / Z2) on the die plate 42. Therefore, the dimension of the third flexible link 14 and the fourth flexible link 15 in the Z direction is AZ = | z2 - Z1 | ,

Measured in these coordinates, the third link 14 and the fourth link 15 are arranged symmetrically with respect to the stroke axis Z-Z, i. Y5 = - Y4.

Again, the first drive means 9 is fixed to the intermediate member 41 at an intermediate member attachment location (X1 / 0/0), and the second drive means 10 is fixed to the intermediate member 41 at an intermediate member attachment location (X2 / 0/0), both of these Pusher attachment locations are arranged symmetrically to the lifting axis ZZ, ie X2 = - X1.

The second arrangement described here represents a decentralized, rectilinearly distributed multipoint flexi-bearing of the die plate 42. The term "decentralized" is understood to mean that the introduction of force into the die plate 42 takes place torque-free via the third connecting means 13, 14 that also on the guides of the die plate 42 (see eg 5, 6, 7, 8 in Fig. 8 ) no torques are entered through the die plate 42.

The third connecting means 13 of the first arrangement (with a central connecting member 13 on the lifting axis ZZ) can also be combined in combination with the third connecting means 14, 15 of the second arrangement (with two decentralized connecting members 14, 15 arranged symmetrically to the lifting axis ZZ) a third arrangement results (not shown) which has a third flexible connecting means 13, 14, 15, which is composed of a third connecting member 13, a fourth connecting member 14 and a fifth connecting member 15, wherein the third flexible connecting member 13 at a Place (0/0 / Z *) is arranged on the Z-axis and the fourth link 14th and the fifth link 15 are arranged symmetrically to the stroke axis ZZ at a location (0 / Y4 / Z *) and a location (0 / Y5 / Z *), respectively, where Y5 = - Y4.

In Fig. 3 to Fig. 9 a first embodiment (pin formation) of the second arrangement described above is shown in various representations.

In the top view of Fig. 3 one recognizes the die plate 42, which has an approximately rectangular plan. The die plate 42 has at four diametrically opposite corner regions of its rectangular-like outline each have a sleeve-like formation 42a, 42b, 42c, 42d, each with a cylinder bore whose cylinder axis extends parallel to the Hubachse ZZ. On its upper side, the die plate 42 has a substantially flat surface 42e to which application specific tools can be mounted. For this purpose, numerous mounting holes in the surface 42e are provided. By means of the four cylinder bores in the four sleeve-like formations 42a, 42b, 42c, 42d, the die plate 42 is supported on four cylindrical guides 5, 6, 7, 8, as best shown in Figs Fig. 8 sees. These guides 5, 6, 7, 8 extend parallel to each other in the Z-direction parallel to the stroke axis ZZ. As a result, the die plate 42 is displaceable along the lifting axis ZZ.

In the top view of Fig. 3 can also be seen the intermediate member 41 which is disposed below the die plate 42 and partially covered by this. In the hidden area, the outline of the intermediate member 41 is shown in dashed lines. The intermediate member 41 has in its plan view outline four lobes 41 a, 41 b, 41 c, 41 d, each having a vertical through hole or a vertical bore. In this vertical through hole and through this extends in each case one of four connecting members 11, 12, 14, 15th

The location of the connecting member 11 and the connecting member 12 in the plan view are on a in the horizontal direction, ie orthogonal to the lifting axis ZZ extending first straight line XX. The connecting member 11 extends through the vertical hole of the bulge 41 b of the intermediate member 41 therethrough and is at its lower end to the Drive means 9, as best seen in the side view of Fig. 4 or in the perspective view of Fig. 6 with the section along the vertical plane XX (see Fig. 3 ) recognizes. The link 12 extends through the vertical hole of the bulge 41 d of the intermediate member 41 and is secured at its lower end to the drive means 10, as is also best in Fig. 4 recognizes.

In the top view of Fig. 3 can also be seen a bulge 42f and a bulge 42g of the die plate 42, which also each have a vertical through hole or a vertical bore. In each case one of the two connecting members 14, 15 extends in this vertical through hole and through it.

The location of the connecting member 14 and the connecting member 15 in plan view are on a in the horizontal direction, ie orthogonal to the Hubachse ZZ extending and orthogonal to the first line XX second straight line YY. The link 14 extends through the vertical hole of the recess 42 f of the die plate 42 and is secured at its lower end to the recess 41 a of the intermediate member 41, as best seen in the side view of Fig. 5 or in the perspective of Fig. 7 with the section along the vertical plane YY (see Fig. 3 ) recognizes. The connecting member 15 extends through the vertical hole of the bulge 42 g of the die plate 42 and is secured at its lower end to the bulge 41 c of the intermediate member 41, as is also best in Fig. 5 recognizes.

In Fig. 9 is an exploded perspective view of the in Fig. 3 to Fig. 8 shown elements shown.

One recognizes the two acting in the vertical direction Z drive means 9 and 10, the intermediate member 41 and guided on the guides 5, 6, 7 and 8 die plate 42. In addition, four screws S are shown, each associated with an annular disc R and a sleeve H. are. These four screw-washer-sleeve combinations SRH each form one of the above-mentioned flexible connecting members 11, 12, 14, 15, wherein the two flexible connecting members 11, 12 for flexible connection of the two upper ends of the two drive means 9, 10 with the intermediate member 41 are used (see, eg Fig. 4 and Fig. 6 ) and wherein the two flexible connecting members 14, 15 for flexible connection of the intermediate member 41 with the die plate 42 are used (see, for example Fig. 5 . Fig. 7 and Fig. 7A ). In the assembled state of the drive means 9, 10, the intermediate member 41 and the die plate 42 having arrangement, the screws S are each tensioned under tension, ie elastically elongated in the Z direction, while the annular disc R and the sleeve H each under pressure, ie are shortened elastically in the Z direction.

In Fig. 10A is a vertical section of a connector shown in more detail 11 or 12 according to a first variant (single screw with sleeve) of the first embodiment (pin formation) shown, which is arranged in a region between the drive means 9 and the drive means 10 and the intermediate member 41. In this case, the screw S protrudes through a through hole L in the intermediate member 41 and through a sleeve H and is screwed with its lower end or tip Sa in a threaded hole G at the upper end of the drive means 9 and 10, while the upper end or the head Sb of the screw rests with its shoulder on the annular disc R, which in turn rests on the upper surface of the intermediate member 41 surrounding the through hole L. The sleeve H has at its lower end and at its upper end in each case a flange-like expansion Ha or Hb, wherein the lower flange-like expansion Ha rests on a threaded bore G surrounding upper surface of the drive means 9 and 10 and the upper flange-like expansion Hb a lower surface of the intermediate member 41 surrounding the through-hole L abuts. The thus formed two units of tensioned screw S, strained annular disc R and strained sleeve H are clamped between the drive means 9 and 10 and the intermediate member 41 and form the first flexible connecting member 11 and the second flexible connecting member 12th

In Fig. 11A is a vertical section of a detailed illustrated connecting member 14 or 15 according to the first variant (single screw with sleeve) of the first embodiment (pin formation) shown in a Region between the intermediate member 41 and the die plate 42 is arranged. In this case, the screw S protrudes through a through hole L in the intermediate plate 42 and through the sleeve H and is screwed with its lower end or tip Sa into a threaded hole G at an upper side of the intermediate member 41, while the head Sb of the screw with his Shoulder rests on the annular disc R, which in turn rests on the through hole L surrounding upper surface of the die plate 42. The sleeve H has at its lower end and at its upper end in each case the flange-like expansion Ha or Hb, wherein the lower flange-like expansion Ha rests against the threaded bore G surrounding upper side of the intermediate member 41 and the upper flange-like expansion Hb at a through hole L surrounding lower surface of the die plate 42 abuts. The thus formed two units of tensioned screw S, tensioned washer R and strained sleeve H are clamped between the intermediate member 41 and the die plate 42 and form the third flexible connecting member 14 and the fourth flexible connecting member 15 of the second arrangement (multipoint flexi-storage /Suspension).

Of course, the third link 13 of the first arrangement (one-point flexi storage / suspension) in the Fig. 11A have described structure. Conveniently, however, it would be somewhat larger than the first connecting member 11 and the second connecting member 12 of this first arrangement.

The flexibility of in Fig. 10A and in Fig. 11A shown pin-like connecting members 11, 12 and 13, 14, 15 can be adjusted for example by the length and / or the wall thickness of the sleeve H and by the choice of the material of the sleeve H. An enlargement / reduction of the length of the sleeve H leads to an increase / decrease in the flexibility of the connecting member. An enlargement / reduction of the wall thickness of the sleeve H leads to a reduction / enlargement of the flexibility of the connecting member. An enlargement / reduction of the modulus of elasticity of the material of the sleeve H leads to an enlargement / reduction of the flexibility of the connecting member.

In Fig. 10B is a vertical section of a connector shown in more detail 11 or 12 according to a second variant (twin screw with disc spring) of the first embodiment (pin formation) shown, which is arranged in a region between the drive means 9 and the drive means 10 and the intermediate member 41. In this case, a first screw S1 protrudes through a first through hole L1 in the intermediate member 41 and through a cup spring stack T and protrudes with its lower end S1 a in a second through hole L2 in a mounting region of the drive means 9 and 10, while the upper end or the head S1b of the first screw S1 rests with its shoulder on a first annular disc R1, which in turn rests on a second annular disc R2, which finally rests on the upper surface of the intermediate member 41 surrounding the first through hole L1 in an annular recess. In addition, a second screw S2 protrudes into the second through-hole L2 in the fastening region of the drive means 9 and 10. The upper end S2a of the second screw S2 is sleeve-like and has inside the sleeve portion S2a an internal thread that has a complementary external thread on the cylindrical Tip S1a of the first screw S1 is engaged, while the lower end or the head S2b of the second screw S2 abuts with its shoulder on a lock nut M, which in turn bears against a third annular disc R3, which in turn bears against a fourth annular disc R4, which finally abuts on the second through hole L2 surrounding lower surface of the mounting portion of the drive means 9 and 10 in an annular recess. The plate spring stack T has a similar function as the sleeve H of the first variant (see Fig. 10A ).

The plate spring stack T has at its lower end a lower plate spring Ta and at its upper end an upper plate spring Tb, each with its large annular surface, the lower and upper face of the plate spring stack T form (similar to the flange-like expansion Ha or Hb of Sleeve H in Fig. 10A ), wherein the lower plate spring Ta rests on an upper surface of the drive means 9 and 10 surrounding the second through hole L2, and the upper plate spring Tb abuts a lower surface of the intermediate member 41 surrounding the first through hole L1.

The first screw S1 and the second screw S2 are screwed together in the assembled state, wherein the plate spring stack T is compressed in the Z direction. The two units thus formed each contain the two strained screws S1, S2, the four strained annular discs R1, R2, R3, R4, the lock nut M and the tensioned plate spring stack T and are clamped between the drive means 9 and 10 and the intermediate member 41. They form the first flexible connecting member 11 and the second flexible connecting member 12.

The contact area 81 between the first annular disc R1 and the second annular disc R2 and the contact area 82 between the third annular disc R3 and the fourth annular disc R4 are each formed by a pair of contacting spherical surfaces, namely a concave spherical surface on the first annular disc R1 and a convex spherical surface on the second annular disc R2, both of which have the same radius of curvature with respect to the common center Z of an imaginary spherical surface, which in FIG Fig. 10B is indicated as a dashed circle. In addition, between the inner surface of the hole of the second annular disk R2 and the outer surface of the first screw S1 and between the inner surface of the first through hole L1 of the intermediate member 41 and the outer surface of the first screw S1, a first annular gap 71 is present. Similarly, a second annular gap 72 is also present between the inner surface of the hole of the fourth annular disc R4 and the outer surface of the second screw S2 and between the inner surface of the second through-hole L2 in the drive means 9 and 10 and the outer surface of the second screw S2. Between the first annular disc R1 and the first screw S1 and between the third annular disc R3 and the second screw S2, there is no radial play or much less radial clearance than in the gap regions 71 and 72.

When mounting the connecting members 11, 12 thus formed, the plate spring stack T is compressed, whereby the respective adjacent spherical surfaces of the first annular disc R1 and the second annular disc R2 and the third annular disc R3 and the fourth annular disc R4 are pressed against each other. The flexibility of the so formed Connecting links 11, 12 (see Fig. 4 and Fig. 6 ) is based on the play in the gap regions 71, 72, on the elastic deformability of the diaphragm spring stack T and on the possibility of sliding together the first and second annular disc R1, R2 in the first contact region 81 as well as the possibility of sliding together the third and the fourth annular disc R3, R4 in the second contact region 82.

In Fig. 11 B is a vertical section of a more detailed illustrated link 14 or 15 according to the second variant (double screw with plate spring) of the first embodiment (pin formation), which is arranged in a region between the intermediate member 41 and the die plate 42. In this case, the first screw S1 protrudes through a first through hole L1 in the die plate 42 and through a plate spring stack T and protrudes with its lower end S1a in a second through hole L2 in the mounting region of the intermediate member 41, while the upper end or the head S1 b of the first screw S1 rests with its shoulder on the first annular disc R1, which in turn rests on the second annular disc R2, which finally rests on the first through hole L1 surrounding the upper surface of the die plate 42 in an annular recess. In addition, the second screw S2 protrudes into the second through hole L2 in the attachment region of the intermediate member 41. The upper end S2a of the second screw S2 is sleeve-shaped and has inside the sleeve portion S2a an internal thread with a complementary external thread on the cylindrical tip S1a first screw S1 is engaged while the lower end or the head S2b of the second screw S2 abuts with its shoulder on the lock nut M, which in turn bears against the third annular disc R3, which in turn bears against the fourth annular disc R4, the finally on the lower surface of the attachment portion of the intermediate member 41 surrounding the second through hole L2 abuts in an annular recess. The plate spring stack T has a similar function as the sleeve H of the first variant (see Fig. 11A ).

The plate spring stack T has at its lower end a lower plate spring Ta and at its upper end an upper plate spring Tb, each with its large annular surface, the lower and the upper end face of the Disc spring stack T form (similar to the flange-like expansion Ha or Hb of the sleeve H in Fig. 11A ), wherein the lower plate spring Ta rests on an upper surface of the intermediate member 41 surrounding the second through hole L2, and the upper plate spring Tb abuts against a lower surface of the female plate 42 surrounding the first through hole L1.

The first screw S1 and the second screw S2 are screwed together in the assembled state, wherein the plate spring stack T is compressed in the Z direction. The two units thus formed each contain the two tensioned screws S1, S2, the four strained annular discs R1, R2, R3, R4, the lock nut M and the tensioned plate spring stack T and are clamped between the intermediate member 41 and the die plate 42. They form the third flexible connecting member 14 and the fourth flexible connecting member 15 of the second arrangement (multi-point flexi-storage / suspension).

Of course, the third link 13 of the first arrangement (one-point flexi storage / suspension) in the Fig. 11B have described structure. Conveniently, however, it would be somewhat larger than the first connecting member 11 and the second connecting member 12 of this first arrangement.

The contact area 81 between the first annular disk R1 and the second annular disk R2 and the contact area 82 between the third annular disk R3 and the fourth annular disk R4 are each formed by a pair of contacting spherical surfaces through the concave spherical surface on the first annular disk R1 and the convex spherical surface on the second annular disc R2, both of which have the same radius of curvature with respect to the common center Z of an imaginary spherical surface, which in FIG Fig. 11B is indicated as a dashed circle. In addition, between the inner surface of the hole of the second annular disc R2 and the outer surface of the first screw S1 and between the inner surface of the first through hole L1 of the die plate 42 and the outer surface of the first screw S1, the first gap 71 is present. Similarly, between the inner surface of the hole is the fourth Ring disc R4 and the outer surface of the second screw S2 and between the inner surface of the second through-hole L2 in the intermediate member 41 and the outer surface of the second screw S2, the second gap 72 is present. Between the first annular disc R1 and the first screw S1 and between the third annular disc R3 and the second screw S2, there is no radial play or much less radial clearance than in the gap regions 71 and 72.

When assembling the thus formed connecting members 14, 15, the plate spring stack T is compressed, whereby the respective adjacent spherical surfaces of the first annular disc R1 and the second annular disc R2 and the third annular disc R3 and the fourth annular disc R4 are pressed together. The flexibility of the links 14, 15 thus formed (see Fig. 5 and Fig. 7 ) is based on the play in the gap regions 71, 72, on the elastic deformability of the diaphragm spring stack T and on the possibility of sliding together the first and second annular disc R1, R2 in the first contact region 81 as well as the possibility of sliding together the third and the fourth annular disc R3, R4 in the second contact region 82.

The flexibility of in Fig. 10B and in Fig. 11B illustrated pin-like connecting members 11, 12 and 13, 14, 15 can be adjusted for example by the total length of the two screws S1 and S2 and / or the wall thickness of the sleeve portion S2a and by the choice of the material of the screws S1 and S2. An enlargement / reduction of the total length of the screws S1 and S2 leads to an increase / decrease in the flexibility of the connecting member. An enlargement / reduction of the wall thickness of the sleeve portion S2a leads to a reduction / enlargement of the flexibility of the connecting member. An enlargement / reduction of the modulus of elasticity of the material of the screws S1 and S2 thereby leads to an enlargement / reduction of the flexibility of the connecting member.

In the Fig. 10B and in Fig. 11B illustrated pin-like connecting members 11, 12 and 13, 14, 15 of the double-screw disc spring type have opposite the in Fig. 10A and in Fig. 11A illustrated pin-like connecting members 11, 12 and 13, 14, 15 of the single screw-sleeve type the advantage that they also allow irreversible deformability in addition to the flexibility based on the mechanisms mentioned in terms of a reversible elastic deformability.

Namely, when loaded in the form of a tilting moment, the intermediate member 41 from the in Fig. 10B shown position is tilted relative to the drive means 9 or 10, takes place up to a maximum value of the tilting moment an elastic deformation of the screws formed by the screws S1 and S2 and by the plate spring stack T flexible Verbingsglieder 11, 12. At sufficiently strong, ie supercritical load ( sufficiently large tilting moment) is overcome in the connecting members 11, 12, the static friction in the first contact region 81 between the first annular disc R1 and the second annular disc R2 and / or the static friction in the second contact region 82 between the third annular disc R3 and the fourth annular disc R4, so that the two annular disks R1 and R2 and / or the two annular disks R3 and R4 begin to slide relative to one another. The extent of this sliding movement is limited by the radial play of the gap 71 or the gap 72. This overcoming of stiction and occurrence of slip under sliding friction in the contact areas 81 and / or 82 produces the irreversible deformation of the links 11, 12.

Instead of using Fig. 10A . Fig. 11A . Fig. 10B . Fig. 11B illustrated and described pin-like first embodiment (see. Fig. 3 ) of the flexible connecting members 11, 12, 14, 15, these can also be designed like a sheet, as shown in Fig. 12 is shown, in which these sheet-like flexible connecting members 11 ',, 12', 14 ', 15' in section along a horizontal sectional plane EE (see 10C, 10D . 11C, 11D ) are shown. The illustrations in Fig. 10A . Fig. 11A . Fig. 10B . Fig. 11B Then vertical sections would be orthogonal to the plane of the respective sheet-like connecting member, the leaf level would then extend in a plane parallel to the lifting axis ZZ.

The sleeve H in Fig. 10A and Fig. 11A would then be replaced by two U-profiles, one of which is open to the left and the other is open to the right. That is, the legs of one U-profile extend to the left, and the legs of the other U-profile extend to the right, while the base of the two U-profiles by fastening means (not shown) to the screws or pins S and S1, respectively would be attached.

The spherical surfaces of the two contact regions 81, 82 in FIG Fig. 10B and Fig. 11B would then be replaced by cylindrical surfaces whose generatrix would extend orthogonal to the lifting axis ZZ, and the annular gaps 71, 72 of the Fig. 10B and Fig. 11B would be replaced by a flat column.

In Fig. 10C is a vertical section of a detailed illustrated link 11 'or 12' according to a first variant (screwed H-profile) of the second embodiment (sheet) shown, which is arranged in a region between the drive means 9 and the drive means 10 and the intermediate member 41. In this case, an H-profile P whose longitudinal axis extends orthogonal to the lifting axis ZZ, between the drive member 9 and 10 and the intermediate member 41 is arranged such that two of the four legs of the H-profile to the left and two of these four legs of the H. Profiles to the right. The lower end Pa of the H-profile P rests on an upper surface of the drive means 9 and 10, respectively, while the upper end Pb of the H-profile P abuts a lower surface of the intermediate member 41. The two resting on the drive means 9 and 10 and the lower end Pa of the H-profile forming two legs are each secured with a fastening screw 61 which extends through a hole in the respective leg and screwed into a threaded hole in the drive means 9 and 10 respectively is. The two adjoining the intermediate member 41 and the upper end Pb of the H-profile forming two legs are also each secured with a fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded hole in the intermediate member 41. The plane EE is the sectional plane along which the links 11 'and 12' in Fig. 12 are shown cut.

In Fig. 11C is a vertical section of a detailed illustrated connecting member 14 'or 15' according to the first variant (screwed H-profile) of the second embodiment (sheet) shown, which is arranged in a region between the intermediate member 41 and the die plate 42. In this case, the H-profile P, whose longitudinal axis extends again orthogonal to the lifting axis ZZ, between the intermediate member 41 and the die plate 42 is arranged such that two of the four legs of the H-profile to the left and two of these four legs of the H-profile extend to the right. The lower end Pa of the H-profile P rests on an upper surface of the intermediate member 41, while the upper end Pb of the H-profile P abuts a lower surface of the die plate 42. The two resting on the intermediate member 41 and the lower end Pa of the H-profile forming two legs are each secured with a fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded bore in the intermediate member 41. The two adjoining the die plate 42 and the upper end Pb of the H-profile forming two legs are also each secured with a fastening screw 61 which extends through a hole in the respective leg and is screwed into a threaded bore in the die plate 42. The plane EE is the sectional plane along which the links 14 'and 15' in Fig. 12 are shown cut.

Of course, the third link 13 of the first arrangement (one-point flexi storage / suspension) in the Fig. 11C have described structure. Expediently, however, it would be dimensioned somewhat larger than the first connecting member 11 'and the second connecting member 12' of this first arrangement.

In Fig. 10D is a vertical section of a detailed illustrated connecting member 11 'or 12' according to a second variant (screwed leaf spring) of the second embodiment (sheet) shown, which is arranged in a region between the drive means 9 and the drive means 10 and the intermediate member 41. In this case, a leaf spring B, whose longitudinal axis extends orthogonal to the lifting axis ZZ, between the drive member 9 and 10 and the intermediate member 41 is arranged such that the leaf plane extends parallel to the lifting axis ZZ. The lower end Ba of the leaf spring B rests on an upper surface of the drive means 9 and 10, respectively, while the upper end Bb of the leaf spring B abuts a lower surface of the intermediate member 41. The lower end or the lower edge Ba of the leaf spring B is fixed by means of two clamping strips K1, K2 to the drive means 9 and 10 respectively. For this purpose, these two terminal strips K1, K2 are respectively screwed by means of fastening screws 62 to the drive means 9 and 10 respectively. In addition, a further fastening screw 63 extends in the transverse direction through a respective through hole in the terminal block K1, in the lower end Ba of the leaf spring B and in the terminal block K2, said fastening screw 63 is screwed at its tip with a fastening nut 64 and tightened. The upper end or the upper edge Bb of the leaf spring B is fixed to the intermediate member 41 by means of two clamping strips K3, K4. For this purpose, these two terminal strips K3, K4 are respectively screwed by means of fastening screws 62 to the intermediate member 41. In addition, here also a further fastening screw 63 extends in the transverse direction through a respective through hole in the terminal block K3, in the upper end Bb of the leaf spring B and in the terminal block K4, and this fastening screw 63 is screwed at its tip with a fastening nut 64 and tightened , The plane EE is the sectional plane along which the links 11 'and 12' in Fig. 12 are shown cut.

In Fig. 11D is a vertical section of a detailed illustrated connecting member 14 'or 15' according to the second variant (screwed leaf spring) of the second embodiment (sheet form) is shown, which is arranged in a region between the intermediate member 41 and the die plate 42. In this case, the leaf spring B, whose longitudinal axis extends orthogonal to the lifting axis ZZ, arranged between the intermediate member 41 and the die plate 42 such that the sheet plane extends parallel to the lifting axis ZZ. The lower end Ba of the leaf spring B rests on an upper surface of the intermediate member 41, while the upper end Bb of the leaf spring B abuts a lower surface of the die plate 42. The lower end or the lower edge Ba of the leaf spring B is fixed to the intermediate member 41 by means of two clamping strips K1, K2. For this purpose, these two terminal strips K1, K2 are respectively screwed by means of fastening screws 62 to the intermediate member 41. In addition, a further fastening screw 63 extends in the transverse direction through a respective through hole in the terminal block K1, in the lower end Ba of the leaf spring B and in the terminal block K2, said fastening screw 63 is screwed at its tip with a fastening nut 64 and tightened. The upper end or the upper edge Bb of the leaf spring B is fixed to the die plate 42 by means of two clamping strips K3, K4. For this purpose, these two terminal strips K3, K4 are respectively screwed by means of fastening screws 62 to the die plate 42. In addition, here also a further fastening screw 63 extends in the transverse direction through a respective through hole in the terminal block K3, in the upper end Bb of the leaf spring B and in the terminal block K4, and this fastening screw 63 is screwed at its tip with a fastening nut 64 and tightened , The plane EE is the sectional plane along which the links 14 'and 15' in Fig. 12 are shown cut.

Of course, the third link 13 of the first arrangement (one-point flexi storage / suspension) in the Fig. 11D have described structure. Expediently, however, it would be dimensioned somewhat larger than the first connecting member 11 'and the second connecting member 12' of this first arrangement.

In Fig. 12 is one of the Fig. 3 similar plan view of the detailed illustrated elements of the second arrangement according to the second embodiment (see Fig. 10C . Fig. 11C respectively. Fig. 10D . Fig. 11D ), wherein the respective connecting members are shown cut along a horizontal plane EE. While the pin-like connecting members 11, 12, 14, 15 of the first embodiment ( Fig. 3 ) are flexible in all directions of the plane XY, the sheet-like connecting links 11 ', 12', 14 ', 15' of this second embodiment ( Fig. 12 ) are practically flexible only for deflections in the X direction while having virtually no flexibility in the Y direction.

According to the invention, however, both the first embodiment of the Fig. 3 with only pin-like connecting members 11, 12, 14, 15 and the second embodiment of the Fig. 12 with only leaf-like connecting members 11 ', 12', 14 ', 15' a torque-free (tilting moment) force introduction into the Die plate 42 in the event that the two drive means 9 and 10 have a difference between their along the press stroke axis ZZ extending paths.

Claims (15)

A powder press for producing a compact of a powdery material, comprising a frame, a punch assembly and a die assembly defining a mold cavity into which the powdered material is fillable and thereafter for forming the compact the punch assembly and the die assembly along a press vertical axis ZZ relative are mutually movable and pressed against each other, characterized in that a) the die assembly (4) with a two parallel along the vertical axis ZZ acting drive means (9, 10) connected intermediate member (41) and guided on guide means (5, 6, 7, 8) along the stroke direction or vertical axis ZZ and with the die plate (42) connected to the intermediate member (41); and or a ') the punch arrangement has a further intermediate member connected to drive means acting in parallel along the vertical axis ZZ and a stamp plate guided on guide means along the stroke direction or vertical axis ZZ and connected to the further intermediate member; that b) the intermediate member (41) is connected to a first drive means (9) by means of a first flexible connection means (11; 11 ') and is connected to a second drive means (10) by means of a second flexible connection means (12; 12') the first connecting means (11; 11 ') and the second connecting means (12; 12') are arranged on a first straight line XX orthogonal to the press vertical axis ZZ; and that c) the intermediate member (41) and the die plate (42) or the further intermediate member and the die plate by means of a third flexible connection means (13; 14, 15; 13 ';14', 15 ') are interconnected on one of the Press vertical axis ZZ orthogonal and orthogonal to the first straight line XX second straight line YY equidistant from the first flexible connection means (11; 11 ') and the second flexible connection means (12; 12') arranged such that by the third flexible connection means (13 14, 15, 13 ', 14', 15 ') transmit the resultant tensile force or thrust force into the die plate (42) or the die plate at a point on a vertical line passing through the center of gravity of the die plate (42) is initiated. A powder press (1) according to claim 1, characterized in that the first flexible connection means comprises a first flexible connecting member (11; 11 ') fixed to the first drive means (9) and to the intermediate member (41); and in that the second flexible connection means comprises a second flexible connection member (12, 12 ') fixed to the second drive means (10) and to the intermediate member (41). Powder press (1) according to claim 1 or 2, characterized in that the third flexible connection means comprises a third flexible connecting member (13; 13 ') attached to the intermediate member (41) and the die plate (42) or to the intermediate member and the punch plate. which is fixed to the intermediate member (41) at an intermediate member attachment location 0/0 / Z1 lying on the vertical axis ZZ and that at the die plate (42) and at the stamp plate, respectively, at a plate attachment location on the vertical axis ZZ 0/0 / Z2 is attached.
(→ variant with central, point / one-point flexi mounting) Powder press (1) according to claim 1 or 2, characterized in that the third flexible connecting means comprises a third flexible connecting member (14; 14 ') fixed to the intermediate member (41) and the die plate (42) or to the intermediate member and the die plate. and fourth flexible link (15; 15 ') fixed to the link (41) at a first link attachment location 0 / Y4 / Z1 and a second link attachment location 0 / Y5 / Z1, respectively, and to the die plate (42) or to the stamp plate at a first plate mounting location 0 / Y4 / Z2 or at a second plate mounting location 0 / Y5 / Z2 are fastened, wherein the intermediate member mounting locations 0 / Y4 / Z1 and 0 / Y5 / Z1 lie on a second straight line orthogonal to the vertical axis ZZ and orthogonal to the first straight line XX, and wherein the plate mounting locations 0 / Y4 / Z2 and 0 / Y5 / Z2 are on a third straight line orthogonal to the vertical axis ZZ and orthogonal to the first straight line XX n lie.
(→ Variant with distributed, linear distributed / multipoint flexi storage) Powder press according to one of Claims 2 to 4, characterized in that one or both of the flexible connecting members (11, 12; 11 ', 12') are each provided with a pin-like member (S, H; S1, S2, B) elastically tensioned parallel to the vertical axis ZZ. T) or sheet-like member (P; B) extending through a respective through hole (L; L1) of the intermediate member (41), a first end (Sa; S1 a; Pa; Ba) of the respective pin-like member (S, H; S1, S2, T) or sheet-like member (P; B) is connected to a respective drive means (9 or 10) and a second end (Sb; S1b; Pb; Bb) of the respective pin-like or sheet-like one Link (S, H, S1, S2, T, P, B) is connected to the intermediate member (41). Powder press according to claim 5, characterized in that one or both of the flexible connecting members (11, 12) are each a screw / spacer unit (S, H; S1, S2, T), the respective spacers (H; T) between which mutually facing sides of the respective drive means (9, 10) and the intermediate member (41) by means of the respective screw (S; S1, S2) is clamped and surrounds the screw (S; S1, S2) like a ring or sleeve, wherein preferably the respective screw (S; S1, S2) extends through the respective through hole (L; L1) of the intermediate member (41), preferably a first end (Sa) of the respective screw (S) into a threaded bore (G) of the respective drive means (9 or 10) is screwed in and a second end (Sb) of the respective screw (S) designed as a screw head bears against the intermediate member (41) in the region of the through hole (L). Powder press according to one of claims 2 to 4, characterized in that one or both of the flexible connecting members (11 ', 12') each by a spring leaf unit (P; B, K1, K2, K3, K4) are formed, their respective Spring leaf (P; B), which is a sheet-like spacer, extending in a plane orthogonal to the first straight line XX, wherein a first end (Pa; Ba) of the respective spring leaf (P; B) with the respective drive means (9 or 10 ) and a second end (Pb; Bb) of the respective spring leaf (P; B) is fixedly connected to the intermediate member (41). Powder press according to Claim 6, characterized in that one or both of the flexible connecting members (11, 12) are mounted spherically (81 and / or 82) on at least one of their ends (S1 b and / or S2b). Powder press according to claim 7, characterized in that one or both of the flexible connecting members (11 ', 12') are cylindrically mounted at their lower end (Pa; Ba) and / or at their upper end (Pb; Bb), the said Cylinder axis or axis of rotation of the storage parallel to the straight line YY extends. Powder press according to one of claims 2 to 9, characterized in that the one or the other further flexible connecting members (13; 14, 15; 13 ';14', 15 ') are each provided with a pin-like member (S) elastically tensioned parallel to the vertical axis ZZ , H; S1, S2, T) or sheet-like member (P; B) extending through a respective through hole (L; L1) of the die plate (42) and the punch plate, respectively, with a first end (Sa; S1a; Pa; Ba) of the respective pin-like member (S, H; S1, S2, T) or sheet-like member (P; B) is connected to the intermediate member (41) and a second end (Sb; S1b; Pb; Bb ) of the respective pin-like or sheet-like member (S, H; S1, S2, T; P; B) is connected to the die plate (42) or to the stamp plate. Powder press according to claim 10, characterized in that the one or two further flexible connecting members (13; 14, 15) are each a screw / spacer unit (S, H; S1, S2, T) whose respective spacers (H; T) between the mutually facing sides of the die plate (42) and the die plate and the intermediate member (41) by means of the respective screw (S; S1, S2) is clamped and surrounds the screw (S; S1, S2) like a ring or sleeve, wherein preferably the respective screw (S; S1, S2) extends through the respective through hole (L; L1) of the die plate (42) or the die plate, wherein preferably a first end (Sa) of the respective screw (S) in a Threaded hole (G) of the intermediate member (41) is screwed and a as Screw head formed second end (Sb) of the respective screw (S) on the die plate (42) in the region of the through hole (L) is present. Powder press according to claim 10 or 11, characterized in that the one or both further flexible connecting members (13 ', 14', 15 ') are each formed by a spring leaf unit (P; B, K1, K2, K3, K4) whose respective spring leaf (P; B) extends in a plane orthogonal to the first straight line XX, wherein a first end (Pa; Ba) of the respective spring leaf (P; B) is fixedly connected to the intermediate member (41) and second end (Pb; Bb) of the respective spring leaf (P; B) is fixedly connected to the die plate (42) or to the stamp plate. Powder press according to claim 11, characterized in that the one or the other further flexible connecting members (13; 14, 15) are mounted spherically (81 and / or 82) on at least one of their ends (S1 b and / or S2b). Powder press according to claim 12, characterized in that the one or the other further flexible connecting members (13 ';14', 15 ') are cylindrically mounted at their lower end (Pa; Ba) and / or at their upper end (Pb; Bb) are, wherein the cylinder axis or axis of rotation of the bearing extends parallel to the straight line YY. Powder press according to one of the preceding claims, characterized in that the stiffness or the flexibility of the flexible connecting means (11, 12, 13, 14, 15, 11 ', 12', 13 ', 14', 15 ') is adjustable.

Images