Gkn Sinter Metals Engineering Gmbh

Robert Maassen

Rainer Schmitt

Hasim Tekines

Eberhard Ernst

The present invention relates to a punching tool of a sintering press, comprising at least one lower punch and an upper punch, a first punch of the upper punch and/or lower punch having a top piece that is asymmetric with respect to an axial axis of the punch press. The first punch has a geometry which widens from the top piece towards a base and is also asymmetric with respect to the axial axis of the punch press. The invention further relates to a method for pressing at least one powdery material to a green body in a sintering press.

Punching tool of a sintering press and method therefor

A sintering press includes at least one upper punch and a lower punch, a powder reservoir for filling a female die of the sintering press with at least one powder material that can be sintered, and a female die for producing a green body using the powder material from the powder reservoir. A first punch of the upper punches and/or lower punches has a punch top which is off-center and asymmetric with respect to an axial axis of the sintering press and which can be moved in the female die. The first punch is asymmetric in shape between the punch top and the base, which shape at least reduces an axial tilting of the punch and a lateral drag of the punch top on an adjacent outer surface in the female die during insertion and extraction therefrom during a pressing step in the production of the green body.

Sintering press with axially controlled deformation, and corresponding method

A plane plate for a pressing tool of a press in which the plane plate activate a punch of the press by way of at least one lifting cylinder that can be displaced along an axial direction. The plane plate has an upper side that points in a first axial direction and a lower side that points in a second axial direction counter to the first axial direction, a link to the at least one lifting cylinder, a centrally disposed receptacle for contacting the punch or a punch holder of the press, as well as at least a first at least partially cylindrical guiding face which for contacting a first guide column is parallel with the axial direction, and a second at least partially cylindrical guiding face which for contacting a second guide column is parallel with the axial direction; wherein on the lower side of the plane plate the first guiding face has a first lower end and the second guiding face has a second lower end, wherein the first lower end and the second lower end in relation to the axial direction are disposed at mutually dissimilar heights and thus are disposed so as to be mutually spaced apart in the axial direction.

Plane plate of a pressing tool

A plane plate for a pressing tool of a press in which the plane plate for activating a punch of the press by way of at least one lifting cylinder is displaceable along an axial direction. The plane plate has a link to the at least one lifting cylinder, a centrally disposed receptaclefor contacting the punch or a punch holder of the press and at least one at least partially cylindrical guiding face, which for contacting a first guide column is parallel with the axial direction. The plane plate has, in at least a first cross section which runs through the link and the receptacle parallel with the axial direction and along a radial direction that runs so as to be perpendicular to the axial direction, at least a first region between the link and the receptacle, having a wall thickness, wherein the wall thickness in the first region and so as to be spaced apart from the receptacle as well as from the link has at least a minimum.

Level plate of a pressing tool

A plane plate for a pressing tool of a press in which the plane plate for activating a punch of the press is by way of at least one lifting cylinder is displaceable along an axial direction. The plane plate has a link to the at least one lifting cylinder, a centrally disposed receptacle for contacting the punch or a punch holder of the press and at least one at least partially cylindrical guiding face which for contacting a guide column is parallel with the axial direction. The plane plate in at least a first cross section which between the receptacle and the guiding face runs parallel with the axial direction and along a radial direction that runs so as to be perpendicular to the axial direction has at least a first region with a wall thickness and a first centerline, wherein the first centerline runs at least partially at a first angle of at least 10 angular degrees and of at most 80 angular degrees in relation to the radial direction.

A plane plate for a pressing tool of a press; wherein the plane plate for activating a punch of the press by way of at least one lifting cylinder is displaceable along an axial direction; wherein the plane plate has a link to the at least one lifting cylinder, at least one cylindrical guiding face which for contacting a guide column is parallel with the axial direction, and a centrally disposed receptacle for contacting the punch or a punch holder of the press; wherein the plane plate in at least a first cross section which between the receptacle and the guiding face runs parallel with the axial direction and along a radial direction that runs so as to be perpendicular to the axial direction has at least a first region in which a wall thickness of the plane plate is continuously variable.

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Witten, Germany

Robert Maassen