Abstract: A method for operating a rotary press, comprising a rotor rotatably driven about a vertical axis that has a die-plate and upper and lower rams which, while being guided vertically in guides of the rotor, interact with holes of dies in the die-plate wherein at least one compression station is provided and has an upper and a lower pressing roller past which the presser rams run along and by which they are moved towards the die-bore for the purpose of compacting the material in the die-hole, wherein the upper and lower rams are lifted subsequent to the compression procedure, causing the lower ram to eject a compact from the die and the compact to be stripped by a stripper in the direction of a discharge chute, characterized in that while an compact ejection procedure is under way the upper ram stands upright on top of the compact and is lifted therewith and the stripper seizes the compact laterally while the upper ram is still standing upright on top of the compact.

Abstract: A rotor for a tablet press including an upper-ram receptacle for the upper rams and a lower-ram guide for the lower rams of the tablet press, as well as a retainer plate having a series of die-bores which are oriented towards the upper and lower rams wherein the retainer plate is composed of at least two ring segments which are adapted to be mounted non-positively and/or positively to the body of the lower-ram guide by means of a fixing device.

Abstract: Rotary press with a rotor, rotatingly drivable around a vertical axis of rotation, which has a die plate with die bores and upper and lower punches guided in guidings, radial cams for the upper and lower punches, at least one compression station with upper and lower pressing roller, at least one filling equipment and at least one stripping device for pressed articles which are ejected from the die bores, characterized in that the rotor has an annular plane situated radially outside of the graduated circle for the die bores, which is concentric to the axis of rotation and is lowered with respect to the upper side of the die plate about a predetermined degree, first deflection portion direct the ejected pressed articles to the annular plane and second deflection portion direct the pressed articles from the annular plane towards the outside.

Abstract: A process for the manufacture of compacts, particularly cemented-carbide cutting blades, by compressing metallic powder and subsequently sintering the compacts wherein the compacts are formed in a powder press having a die-plate, an upper ram and at least one lower ram which are associated with a die-bore and are adapted to be actuated by a hydraulic press cylinder with the rams having associated thereto force-measuring devices and path-measuring devices to measure the compression forces during the ram feed motion up to the final positions, wherein the value of the energy to be applied by the upper ram is stored for a compact of predetermined geometry and dimensions and a predetermined material, that the overall energy to be applied by the upper and lower rams is further stored as a second value, that the feed motion of the upper ram is completed when the energy applied by the ram has reached the predetermined first value and the feed motion of the lower ram is effected depending on the application of the res

Abstract: A rotor for a tablet press including an upper-ram receptacle for the upper rams and a lower-ram guide for the lower rams of the tablet press, as well as a retainer plate having a series of die-bores which are oriented towards the upper and lower rams wherein the retainer plate is composed of at least two ring segments which are adapted to be mounted non-positively and/or positively to the body of the lower-ram guide by means of a fixing device.

Abstract: A method for minimizing the spread of the maximum compression forces in compacting powder, specifically metallic powder, by means of a powder press which has a die-plate, an upper ram, and at least one lower ram which are associated with a die-bore and are respectively operable by a hydraulic press cylinder, and a charging shoe movable on the die-plate along a predetermined path for filling the die-bore with the powder, wherein the maximum compression force of at least the upper ram is measured upon arrival at a predetermined position, the charging shoe, the die-plate, the upper ram and/or lower ram are vibrated at a predetermined frequency and amplitude during the filling operation and/or at the beginning of the compression procedure and, in addition, the filling time or the course of charging shoe motion in time are predetermined, wherein the frequency distribution of the maximum compression force values is determined at intervals and the standard deviation is determined therefrom for the maximum compressio

Abstract: Rotary press with a rotor, rotatingly drivable around a vertical axis of rotation, which has a die plate with die bores and upper and lower punches guided in guidings, radial cams for the upper and lower punches, at least one compression station with upper and lower pressing roller, at least one filling equipment and at least one stripping device for pressed articles which are ejected from the die bores, characterised in that the rotor has an annular plane situated radially outside of the graduated circle for the die bores, which is concentric to the axis of rotation and is lowered with respect to the upper side of the die plate about a predetermined degree, first deflection means are provided which direct the ejected pressed articles to the annular plane and second deflection means are provided which direct the pressed articles from the annular plane towards the outside.

Abstract: A method for operating a rotary press, comprising a rotor rotatably driven about a vertical axis that has a die-plate and upper and lower rams which, while being guided vertically in guides of the rotor, interact with holes of dies in the die-plate wherein at least one compression station is provided and has an upper and a lower pressing roller past which the presser rams run along and by which they are moved towards the die-bore for the purpose of compacting the material in the die-hole, wherein the upper and lower rams are lifted subsequent to the compression procedure, causing the lower ram to eject a compact from the die and the compact to be stripped by a stripper in the direction of a discharge chute, characterized in that while an compact ejection procedure is under way the upper ram stands upright on top of the compact and is lifted therewith and the stripper seizes the compact laterally while the upper ram is still standing upright on top of the compact.

Abstract: A set of compaction rams and/or die-plates for a tabletting machine has all of the compaction rams and/or die-plates of the set furnished with a code containing at least the following information: (a) a label for the set of compaction rams and die-plates; (b) an individual label for each compaction ram and/or die-plate within the set; (c) data effective to critically dimension the compaction ram and/or die-plate which contains the code; and (d) data containing service life information for the compaction ram and/or die-plate which contains the code.

Abstract: A rotor for a tablet press including an upper-ram receptacle for the upper rams and a lower-ram guide for the lower rams of the tablet press, as well as a retainer plate having a series of die-bores which are oriented towards the upper and lower rams wherein the retainer plate is composed of at least two ring segments which are adapted to be mounted non-positively and/or positively to the body of the lower-ram guide by means of a fixing device.

Abstract: A hydraulic press for compressing metallic powder or the like to form compacts, comprising a die-plate, an upper ram, and at least one lower ram which interact with a die-bore and are operable each by a dual-action hydraulic press cylinder, whereby a limited dead path length is provided for the return stroke in the force path between the press cylinder and the upper ram in which the upper ram is not carried along, and that a separate pressure generator producing a variable pressure is arranged in parallel with the force path via which a compression force is produced on the upper ram during the dead path length.

Abstract: An arrangement of a die-plate of a hydraulic press to press powdered material into shape wherein an upper ram and a lower ram interact with a bore of the die-plate wherein the die-plate is supported via vertically arranged supporting standards which, along with upper supporting portions which are cantilevered towards the axis of the die-bore, define upwardly facing bearing areas located close to the die-bore for the die-plate.

Abstract: A process for compressing metallic powder into a compact in a powder press which has a die-plate, a hydraulically operated upper ram and at least one hydraulically operated lower ram, wherein the lower ram is set to vibrations while the die-plate is being filled with metallic powder.

Abstract: A process for compacting powdered material to form a compact of a predetermined thickness and having at least one lateral oblique surface by means of a bore in a die bolster for receiving the powdered material and an upper ram and a lower ram, which are operable by means of a hydraulic power-exerting device and are positionable by means of a control device with respect to the die bolster, comprising the following steps: The deformations of the die bolster are measured or calculated for various compacting forces and the correlating values are filed as a table in a memory with the deformations forces being determined from the difference of the compacting forces of the two rams, and Deformation is determined during the compaction procedure by applying the deformation force measured to the table and the feed length of the upper and lower rams is corrected depending on deformation.

Abstract: A method for operating a rotary tabletting machine the rotor of which has a die-plate, upper rams, and lower rams which interact with the die bores, and has a stationary filling device interacting with the upper side of said die-plate, and wherein the lower rams are located in the die bores when they run along beneath the filling device and said lower rams are adjusted in their positions by means of a filling and/or proportioning cam, wherein said filling and/or proportioning cams is set into vibrations.

Abstract: A die for a rotary compression press, comprising a die holder axially supported in a guide bore and a die insert which is seated in the end-side bore of the die holder via a trunnion-shaped projection and is adapted to be mounted via releasable fastening means, wherein the projection is helically guided in the bore between axially spaced stops and is biased by a spring towards the associated front-end face of the die holder.

Abstract: A set of compaction rams and/or die-plates for a tabletting machine has all of the compaction rams and/or die-plates of the set furnished with a code containing at least the following information: (a) a label for the set of compaction rams and die-plates; (b) an individual label for each compaction ram and/or die-plate within the set; (c) data effective to critically dimension the compaction ram and/or die-plate which contains the code; and (d) data containing service life information for the compaction ram and/or die-plate which contains the code.

Abstract: A rotary compression press for cylindrical compacts, especially tablets, comprising a rotatably driven rotor including a die-plate and an upper and a lower ram guide for upper and lower rams cooperating with the die bores, and a pressure station with an upper and a lower pressure roller for applying a pressing power to the rams wherein the rams circumferentially have an annular tooth system which cooperates with an opposed tooth system in the area of a pressure station for the rams for the purpose of rotating the rams in the die bores thereof, characterized in that the opposed tooth system is defined by a rotatably supported gear which is acted on by a preset braking torque with the braking torque being chosen so as to be smaller than the torque of the ram when under a maximum pressing power.

Abstract: A rotor for a tablet press including an upper-ram receptacle for the upper rams and a lower-ram guide for the lower rams of the tablet press, as well as a retainer plate having a series of die-bores which are oriented towards the upper and lower rams wherein the retainer plate is composed of at least two ring segments which are adapted to be mounted non-positively and/or positively to the body of the lower-ram guide by means of a fixing device.

Abstract: A rotor for a tablet press including an upper-ram receptacle for the upper rams and a lower-ram guide for the lower rams of the tablet press, as well as a retainer plate having a series of die-bores which are oriented towards the upper and lower rams wherein the retainer plate is composed of at least two ring segments which are adapted to be mounted non-positively and/or positively to the body of the lower-ram guide by means of a fixing device.