Abstract: A press for producing a molded part from pourable material has an apparatus for driving a die that includes a cylinder unit having a cylinder housing and having a cylinder piston. The cylinder housing is the actuator of the cylinder unit and the cylinder piston is the stator of the cylinder unit.

Abstract: A press for producing a molded part from pourable material has an apparatus for driving a die that includes a cylinder unit having a cylinder housing and having a cylinder piston. The cylinder housing is the actuator of the cylinder unit and the cylinder piston is the stator of the cylinder unit.

Abstract: In order to shorten set-up times, a press for producing a molded part from pourable material, having an apparatus for driving a die comprising a cylinder unit having a cylinder housing and having a cylinder piston is proposed, wherein the cylinder housing is the actuator of the cylinder unit and the cylinder piston is the stator of the cylinder unit.

Abstract: In order to shorten set-up times, a press for producing a molded part from pourable material, having an apparatus for driving a die comprising a cylinder unit having a cylinder housing and having a cylinder piston is proposed, wherein the cylinder housing is the actuator of the cylinder unit and the cylinder piston is the stator of the cylinder unit.

Abstract: The invention relates to a process for the preparation of thermoplastic molding materials comprising A) from 39 to 99% by weight of at least one thermoplastic polymer, B) from 1 to 60% by weight of a flameproofing component comprising B1) an expandable graphite, and C) from 0 to 60% by weight of further additives, the percentages by weight being based in each case on the total weight of the components A) to C) and together giving 100% by weight, by mixing melts of the components A), B) and, if present, C) in a screw extruder, the screw extruder comprising at least one metering zone, one plasticating zone, one homogenization zone and one discharge zone in this sequence along the conveying direction, wherein the metering of the expandable graphite B1) into the screw extruder is effected at a point behind which—viewed in the conveying direction—the extruder screw comprises substantially no shearing elements, and thermoplastic molding materials which can be prepared by these processes, the use of said the

Abstract: The present invention relates to a molding composition comprising (A) a copolymer containing at least one ?,?-unsaturated monocarbonitrile and at least one aromatic vinyl monomer, (B) a graft rubber with an average particle size of from 100 to 280 nm, composed of at least one ?,?-unsaturated monocarboxylic ester, and at least one graft shell composed of at least one aromatic vinyl monomer and of at least one ?,?-unsaturated monocarbonitrile, (C) a graft rubber with an average particle size of from 410 to 1000 nm, composed of at least one ?,?-unsaturated monocarboxylic ester, and at least one graft shell composed of at least one aromatic vinyl polymer and of at least one ?,?-unsaturated monocarbonitrile, and wherein the ratio by weight of component (B) to component (C) is from 3:1 to 1:1. The invention also relates to the process of producing the molding composition and its use.

Abstract: Thermoplastic moulding compositions comprising the following components: 5-95% of a copolymer A, 0-60% of a graft rubber B and 5-50% of thin glass fibers C. The copolymer A comprises 70-76% of vinylaromatic monomer(s) A1, 24-30% of vinyl cyanide monomer component(s) A2 and 0-50% of one or more unsaturated copolymerizable monomers A3. The thermoplastic moulding compositions are advantageously used for injection moulding.

Abstract: A method for producing a piston for an internal combustion engine, designed as a cooling duct piston for small compression heights. The piston includes a lower part and an upper part which are supported by one or more corresponding joining planes and are connected of a friction welding process. The piston encloses an inner, trough-shaped cooling duct and an outer cooling duct which is axially spaced apart from an annual area. The inner cooling duct is formed in the lower part of the piston by a mechanical machining process, such as a forging process. Transfer openings which are assigned to the cooling ducts are formed before the frictional welding of the joining planes.

Abstract: A powder press for compacting a compressible mass into a rigid and dimensionally accurate body has a base, a first sleeve part in the base and having an inner surface, and a second sleeve part movable in a predetermined direction on the base adjacent the first die part between an inner position and an outer position. The second part has an inner surface forming in the inner position with the first-part inner surface a cavity open outwardly in the direction. A piston shiftable in the direction in the cavity can compact the mass therein. An actuator can shift the second part in the direction relative to the first part between the inner and outer positions.

Abstract: A powder press for compacting a compressible mass into a rigid and dimensionally accurate body has a base, a first sleeve part in the base and having an inner surface, and a second sleeve part movable in a predetermined direction on the base adjacent the first die part between an inner position and an outer position. The second part has an inner surface forming in the inner position with the first-part inner surface a cavity open outwardly in the direction. A piston shiftable in the direction in the cavity can compact the mass therein. An actuator can shift the second part in the direction relative to the first part between the inner and outer positions.

Abstract: A press for pressing pulverulent materials, in particular metal powder, having an eccentric crank drive, which has at least one connecting rod and a crankshaft and a gearwheel which is connected thereto in a rotationally fixed manner, for driving an upper punch unit. It is possible to drive the gearwheel via at least one worm drive of at least one motor. An electronic control unit is also provided. In this press, the electronic control unit is designed for reversing operation of the crankshaft.

Abstract: A device for producing pressed articles with a main cylindrically-shaped elements and secondary helically-shaped element from powdered material, especially powdered metal, with a female mold and with at least one top punch, which is supported so as to be rotatable about its longitudinal axis, and at least one bottom punch, which is supported so as to be rotatable about its longitudinal axis. The top and bottom punches are movable axially relative to the female mold by means of motor drives and the top punch, of which there is at least one, is driven in rotation about its longitudinal axis to achieve a helical movement in addition to its axial drive the bottom punch, of which there is at least one, is also driven in rotation. Rotary motor drives of the punches are mechanically uncoupled from the drives for the axial movement of the punches and may be regulated separately by an electronic control.

Abstract: A plurality of rams in a pressing machine are movable into and out of a predetermined position to compress power material and shape a die-formed part. The rams are advanced to a pre-selected spaced relationship to form a desired configuration of the die-formed part. Strain gauges are mounted on each ram to detect during the pressing operation elastic deformation, altering the dimension of the ram and the shape of the die-formed part. In response to detected elastic deformation, the strain gauges transmit a signal through a controller to a readout device for recording the magnitude of ram deformation. Thereafter, the press drive mechanism is actuated to move the rams to compensate for the change in dimension of the rams so that the rams are repositioned to maintain the desired spaced relationship for a predetermined configuration of the die-formed part.

Abstract: Precision compacts are produced from powdered material in a mold having at least one top plug and at least one bottom plug between which plugs the powdered material is compressed. The course of the pressing force of at least one of the plugs is detected as a function of the path of its travel during compression, and compared with a predetermined path-dependent tolerance range of the pressing force. Upon exceeding such tolerance range, the final pressing position of the plug in question is changed in such a manner that the height of the compact in such final pressing position is reduced by an amount corresponding to the increased springing back of the compact upon its removal from the mold that results from the greater final pressing force.