Abstract: A method for producing a resin-bonded magnet, which includes steps of mixing a magnet element and microcapsules each of which contains at least one component of a thermally polymerizable resin composition as a binder component, mechanically breaking at least a part of the microcapsules during formation of a green compact comprising said resin composition and said magnet element to discharge the components of said resin composition from the capsules, and curing said resin to produce the resin-bonded magnet.

Abstract: A powder compacting press wherein one or more upper and one or more lower punches are respectively advanced toward each other in a die filled with an amount of powder to producing a pressed part in the shape of the die and punch configuration. The press including measuring device on the upper and lower punches to measure the peak forces applied to the upper and the lower punches and to generate a first signal proportional to the forces, calculating device for receiving the first signal and calculating the ratio of the forces of the upper and lower punches and transmitting a second signal that is proportional to the ratio, and adjusting device for receiving the second signal and adjusting the forces applied to each punch based upon the second signal to achieve a predetermined green density distribution in the pressed part whereby substantial uniformity in part dimensions is achieved.

Abstract: An article is molded by contacting it with a solid polymer medium, such as an especially low strength unfilled silicone rubber which is solid and able to flow readily. Thermal expansion of the medium or mechanical force is used to create molding pressure and thereby provides a substantially uniform pressure on the article precursor. Various temperature and pressure cycles can be attained; constant high pressures can be maintained on the article precursor during cooldown, optionally aided by flowing of medium to and from a vessel in which the article precursor is being molded. The method is particularly adapted to molding filler or fiber reinforced thermosetting polymer composite articles.

Abstract: A press, especially for the manufacture of die-formed parts of dimensional accuracy made of powdered materials is described, which can be equipped and used interchangeably either for the use of the so-called smoothing process or the so-called plunger process. It includes a press support 103 on which a fixed press bed 104 and a vertically slidable press frame 105 are mountred for movement relative to each other by a mechanical drive, preferably a toggle linkage 106, to form a main press ram. Further, it has a bottom ram passing upwardly through the press bed 104 which serves as a smoothing ram or a plunger ram, being operated for both purposes by a double-arm lever 123 pivoted on the press support and actuated by a rock lever 133 likewise pivoted on the press support 103 and having a sliding pivoting connection to the double-arm lever 123.

Abstract: Apparatus for the production by powder metallurgy of a heat exchanger block in which two spaced concentric half shells are provided with holes in which profiled pipes are inserted. The profiled pipes are internally supported by pins when metal powder is injected into the hollow space between the half shells for forming a wall section of a header. The radially outer half shell is formed by a plurality of half rings arranged with their side faces in contact with one another and the half rings are individually removed after the wall section is formed.

Abstract: A die assembly having a cavity in which powdered metal is compressed with upper and lower punches. A core extends through the lower punch to form the inner wall of a bushing, and a core extension rod having a lateral protrusion that extends into the cavity to form a groove in the upper portion of the bushing. The core and the core extension rod move in concert between positions to receive powder, compress it and moves upward to afford expelling the finishing bushing. One stationary protrusion extends from the die into the cavity to form a groove in the powdered metal along the full length of the completed bushing. Air passage means are used to direct air into the cavity to remove residue powder that may eventually build-up and cause inaccuracies. Also, in the preferred embodiment a powder feeder means is used on a die table to reciprocate between a retracted, inactive position and an extended position to deposit powdered metal into the cavity and later to bump a finished bushing across the table.

Abstract: A die assembly having a cavity in which powdered metal is compressed with upper and lower punches. A core extends through the lower punch to form the inner wall of a bushing, and a core extension rod having a lateral protrusion that extends into the cavity to form a groove in the upper portion of the bushing. The core and the core extension rod move in concert between positions to receive powder, compress it and moves upward to afford expelling the finished bushing. One stationary protrusion extends from the die into the cavity to form a groove in the powdered metal along the full length of the completed bushing. Air passage means are used to direct air into the cavity to remove residue powder that may eventually build-up and cause inaccuracies. Also, in the preferred embodiment a powder feeder means is used on a die table to reciprocate between a retracted, inactive position and an extended position to deposit powdered metal into the cavity and later to bump a finished bushing across the table.

Abstract: A vacuum assisted feeding apparatus for delivering finely pulverized particulate materials, such as powdered metal, is disclosed in which a material holding hopper has a feeder tube extending into a lower disposed filling chamber subject to sub-atmospheric pressures to effect vacuum assisted gravity flow of the powder material into the filling chamber. Powder in the filling chamber is vacuum/gravity fed to a mold cavity until the cavity is filled, whereafter powder is accumulated in the filling chamber until the discharge end of the feeder tube is occluded by the powder to disrupt the feeding operation.

Abstract: An apparatus using a shape memory alloy such as nickel-titanium as a die material in one embodiment is used for performing pseudo-isostatic pressing by using a uniaxial mechanical press to densify a powder mixture, preform or presinter with or without the use of pressure transmitting powder. The apparatus can also be used to perform thermal mechanical work on any article to obtain near net shape. With controlled thermal mechanical processing and fabrication of the shape memory alloy into a die configuration, its shape can be changed from a low temperature configuration to a high temperature configuration after being heated. As a result, near net shape parts can be cold or hot pressed pseudo-isostatically without using an expensive and sophisticated press apparatus of the prior art. In a second embodiment, the shape memory alloy is employed as the expansion tooling for near net shape forming of composite materials.

Abstract: Rotary forging of a component from powder is accomplished in a single forging operation without any sintering or other processing by firstly pressing the powder in a closed die situation to produce an initial compressed form and then subjecting this compressed form to a rotary forging process.

Abstract: Methods and apparatus are disclosed for consolidating loose or pre-compressed particulate materials, such as metal powder or metal flakes, in press equipment utilizing a reusable canister means that is sealed in vacuum from the atmosphere and heated prior to consolidation in the press equipment at elevated pressures and temperatures, thereby improving utilization of the press equipment.

Abstract: A process for high efficiency hot isostatic pressing in a hot isostatic pressing treatment for sintering or densifying a ceramic or metallic workpiece in a high temperature and high pressure gas atmosphere, which includes preheating the workpiece outside a high pressure vessel prior to the hot isostatic pressing treatment, transferring the preheated workpiece as surrounded with the gas in a hot state into the high pressure vessel, then treating the workpiece at high temperature and high pressure in a gas atmosphere, thereafter taking out the workpiece from the high pressure vessel together with the gas atmosphere, then cooling the workpiece if necessary, and subsequently taking it out from the gas atmosphere, as well as an apparatus for practicing the above-noted process, wherein a treating chamber for effecting the hot isostatic pressing treatment is covered with a hermetic casing, and at least one valve mechanism capable of providing communication and cut-off between the interior and exterior of the treatin

Abstract: A cold isostatic press of the multiple container type including a press frame and an upper plug movable toward and away from a plurality of shaping containers and adapted to perform an operation of loading or unloading a first shaping material from a container and a pressure-forming operation on a second container concurrently at different positions, characterized in that the cold isostatic press includes a plurality of stationary shaping containers securely mounted on a fixed container frame. The press frame is supported linearly reciprocably or swingably for movement to and from a plurality of containers on the fixed container frame.

Abstract: An apparatus using a shape memory alloy such as nickel-titanium as a die material for performing pseudo-isostatic pressing by using a uniaxial mechanical press to densify a powder mixture, preform or presinter with or without the use of pressure transmitting powder. The process can also be used to perform thermal mechanical work on any article to obtain near net shape. With controlled thermal mechanical processing and fabrication of the shape memory alloy into a die configuration, its shape can be changed from a low temperature configuration to a high temperature configuration after being heated. The shape transformation temperature for nickel-titanium alloy in particular, ranges from about -200 degrees Centigrade to +100 degrees Centigrade depending primarily upon alloy composition.

Abstract: An apparatus using a shape memory alloy such as nickel-titanium as a reaction vessel for self-sustaining combustion (SSC) reaction synthesis of ceramics, intermetallics, metal or ceramic matrix composites and the like and as a die material for pseudo-isostatic hot pressing by providing a uniaxial mechanical press to density the reaction products with or without the use of pressure transmitting powder. The process can also be used to perform thermal mechanical work on any article synthesized by the self-sustaining combustion reaction to obtain near net shape. With controlled thermal mechanical processing and fabrication of the shape memory alloy into a die configuration, its shape can be changed from a low temperature configuration to a high temperature configuration after being heated. The shape transformation temperature for nickel-titanium alloy in particular, ranges from about -200 degrees Centigrade to +100 degrees Centigrade depending primarily upon alloy composition.

Abstract: A pressure transmitting apparatus for hot - press sintering comprises a container 21 with a lid 22, a piston 23, a superplastic alloy medium 24a and 24b and heaters 25a, 25b, and 25c. A force is applied to generate an isostatic compression pressure on the powder body.

Abstract: A hot isostatic press apparatus wherein a material to be processed such as preliminarily shaped metal powder is charged into a high pressure vessel provided with a heater and the material to be processed is pressed by superhigh pressure of fluid or gas sealed into the vessel and heating by a heater. The apparatus includes a main station including a high pressure vessel, a movable cover, a member for moving the material to be processed; one or more auxiliary stations including an inserting station, a preheating station, a removing station, etc.; a sealed tank; and transfer mechanisms for the material to be processed. The apparatus also includes a seal leakage detector.

Abstract: There is disclosed a method and apparatus for forming compacts from finely divided solid particles or a mixture of fine and coarse particles in a dry, semi-dry or plastic state by the application of ultra-high pressures in the range of 100,000 psi and greater while preventing delamination upon extraction of the finished product. A die is provided that has a plurality of die segments resting on a base to form a die chamber. A retainer is secured to the base, and surrounds and engages the die segments to prevent movement of the die segments during the forming process. Means are provided for substantially instantaneous disengagement of the retainer from all of the die segments.

Abstract: A pair of non-circular gears having a fixed sum of the radius of the gears is used as transmission gears secured between a power shaft and a crank shaft. Each radius of the non-circular gears increases or decreases according to the required rotation. A powder feeding time in one cycle is prolonged by delaying the lowering velocity of an upper ram near the lowermost dead point of the upper ram which carries out the powder compacting and performing a quick return motion of the upper ram after a compacting zone.

Abstract: A preformed body (12) from powder material of metallic and nonmetallic compositions and combinations thereof, is consolidated to form a densified compact (12") of a predetermined density. An outer container mass (20), capable of fluidity in response to predetermined forces and temperatures and which is porous to gases at lesser temperatures and forces than said predetermined force and temperature, surrounds an internal medium (22). The internal medium encapsulates the preformed body (12) within the container mass (20) and is capable of melting at the lesser temperatures to form a liquid barrier to gas flow therethrough. The internal medium (22) is capable of rapid hermetic sealing during the early stages of preheat. External pressure is applied by a pot die (16) and ram (14) to the entire exterior of the container mass (20) to cause the predetermined densification of the preformed body (12) by hydrostatic pressure.

Abstract: The invention relates to a process and an apparatus for preparing binder-free hot-briquets for smelting purposes from ferrous pyrophorous, finely divided solids, such as dry steelmaking-filter dust or slightly granular sponge iron from direct-reduction plants. Before the briquetting stage, oxidizing gas is blown at a temperature of more than 200.degree. C. through the finely divided dry solid containing more than 4% by weight of metallic resin. The flow rate of this gas is controlled in such a way that oxidation of some of the metallic iron raises the temperature of the finely divided solid to 450.degree. C. to 650.degree. C. This is followed by hot-briquetting.

Abstract: The present invention relates to a method of manufacturing widgets from components and/or particulate; and to a can for containing such components and/or particulate during the consolidation into widgets. The method of the present invention can be used to form widgets from metals, ceramics, plastics, polymers, and/or combinations thereof. The materials used to form the widgets can be in the form of particulate, pellets, shard, and/or ribbon. The method of the present invention can also be used to join widgets and/or to heal ingot cracks.

Abstract: A molding machine for making bricks, etc. having a mold open on both ends and opposed plungers for cooperation with the mold, the mold and plungers being removable and replaceable as a set.

Abstract: The specification discloses a powder process in which metal or ceramic particles are mixed with a binder such as ultra high molecular weight polyethylene powder and are compacted. The compacted shape is heated to a temperature near the melting point of the binder to consolidate the binder and produce a green shape. The green shape is formed and the binder is removed. Thereafter, the shape is sintered to form a final part.

Abstract: The present invention relates to a method and apparatus for preparing metal-embedded porous metallic-hydride (pmh) compacts capable of with standing repeated hydriding-dehydriding cycles without disintegrating. According to the invention, the finely divided hydridable metal alloy hydride is admixed with a finely divided metal selected from Al, Ni, Cu or other transition metals and charged with hydrogen. The resulting mixture is sintered in a furnace in which hydrogen is introduced at a pressure above the equilibrium pressure to the prevailing temperature, mechanical stress being applied simultaneously. The compacts obtained possess outstanding stability, as shown by the fact that they have remained intact even after more than 6000 cycles.

Abstract: A mold for producing an anisotropic magnet from a composition essentially consisting of magnetic powder and a binder, a mold body, a cavity for molding the composition in the presence of an anisotropically oriented magnetic field produced by a plurality of first magnets for providing magnetic fluxes for the magnetic field in the cavity, yokes, each provided between the cavity and the first magnets, and second magnets provided on both circumferential sides of the yokes for preventing the leakage of the magnetic fluxes. The first and second magnets are made of permanent magnets such as rare earth cobalt magnets. The mold may be provided at both ends with third magnets for preventing the axial leakage of the magnetic flux from the axial ends of the yokes. Two or more molds may be combined in a single molding apparatus while sharing the first magnets. This mold is suitable for the injection, extrusion or insert molding of bonded magnet rolls, motor rotors, etc.

Abstract: A method and an apparatus for producing moulded blanks by hot-pressing metal powder, preferably spherical metal powder, inside a thin-walled capsule comprising an outer sleeve (2), an insertion sleeve (4) disposed approximately centerally inside the latter, a base (3) and a cover (5), inside which one separable mould (1) of solid material may be inserted. The mould (1) and the two sleeves (2, 4) are dimensioned in such a way that between the inner insertion sleeve (4) and the mould (1) there is formed a mould cavity into which the metal powder may be poured. After the metal powder is poured in, the still open capsule is subjected to a preliminary compression by means of vibration. The capsule is subsequently closed in a gas-tight manner by means of the cover (5). Then the metal powder inside the capsule is subjected to a heat-isostatic pressing at an elevated pressure and an elevated temperature of approximately 1000.degree. to 1200.degree. C.

Abstract: A die/target is disclosed for consolidation of a powder, especially an atomized rapidly solidified metal powder, to produce monoliths by the dynamic action of a shock wave, especially a shock wave produced by the detonation of an explosive charge. The die/target comprises a rectangular metal block having a square primary surface with four rectangular mold cavities formed therein to receive the powder. The cavities are located away from the geometrical center of the primary surface and are distributed around such center while also being located away from the geometrical diagonals of the primary surface to reduce the action of reflected waves so as to avoid tensile cracking of the monoliths. The primary surface is covered by a powder retention plate which is engaged by a flyer plate to transmit the shock wave to the primary surface and the powder. Spawl plates are adhesively mounted on other surfaces of the block to act as momentum traps so as to reduce reflected waves in the block.

Abstract: A hermetically sealed capsule (10) containing degased metal powder (11) is embedded in a soft metal flow die (20). Subsequently the flow die (20) is compressed in a cavity block, thereby compressing the metal powder (11) by the hydrostatic pressure of the flow die and simultaneously shaping the said powder. This results in the reforming of the structure right down to the interior of the particles with compression of up to 100%. The shaping process can be aided by moulding dies (17, 18) embedded in the flow die (10) around the capsule (10) at a distance from each other and, when closed, forming a cavity, the shape of which deviates from that of the original shape of the capsule (10). The capsule (10) containing the metal powder is formed during closure of the moulding cavity.

Abstract: A quantity of material (10), which is at less than a predetermined density, is disposed within a sealed container (12) which is, in turn, disposed in a first thermal jacket (32) to retain the heat within the material (10) to be consolidated. The first thermal jacket (32) is placed within a second thermal jacket (34) which is, in turn, disposed in a cavity defined by two elastomeric components (22, 24) retained between a ram (16) and pot die (14) of a press whereby upon closure of the press, the ram (16) enters the cavity (26) of the pot die (14) to apply external pressure to the entire exterior of the elastomeric components (22, 24). A seal (36) of material harder than the elastomeric material (22, 24) is disposed within the cavity (26) of the pot die (14) for preventing the elastomeric medium (22, 24) from leaking between the sliding surfaces of the ram (16) and the pot die (14).

Abstract: The invention relates to a multi-lobe composite casing, the inner wall of said casing being constituted by several adjacent cylindrical sectors, each enveloping a screw over the portion of the latter outside the penetration zone. According to the invention the hardest metal layer deposited on the inner wall of the body is applied in the form of a powder containing the desired constituents. This powder is welded to the metallic inner base wall by means of a plasma torch operating on the principle of a transferred arc or a semi-transferred arc. The invention is applied to machines with several overlapping screws of the extruder type.

Abstract: A thin-walled elastic envelope or mold element is arranged within a divisible outer supporting mold of porous material and a vacuum is applied to the outer supporting mold. Thereupon powdered metal or ceramic is introduced into the elastic mold element and the mold element is closed and pressurized to form a preform. The preform is then subjected to cold isostatic pressurization which is applied to the outer surface of the elastic mold element. Prior to the cold isostatic pressurization, the vacuum applied to the outer supporting mold is terminated and a vacuum is produced within the elastic mold element.

Abstract: A mold comprising a core which is open at one end and has the negative contour of the workpiece and a sheet-metal outer container surrounding the core. High dimensional stability of the core, easy removability of the workpiece from the mold and a smoother surface of the workpiece are obtained by isostatic pressing of titanium powder in the spaces in the mold. The core consists, at least at its negative contour surface for the workpiece, of a high-temperature alloy, particularly one having a base of nickel or iron. This and the titanium powder material of the workpiece are neutral in chemical reaction and low in or free of diffusion with respect to each other upon the hot isostatic pressing. The core is in the form of a ring of segments surrounded by a solid holding ring.

Abstract: Apparatus and method for compensating uneven gravity filling with powder material of a die cavity formed on the top of a punch reciprocable in a bore in a die plate, the punch having an end face normally parallel to the surface of the die plate. The punch is mounted on an adjustable support member split into portions having each an end face disposed parallel to the end face of the other portion. The two portions have a common surface of junction disposed in a plane at an angle to the parallel end faces. The two portions are rotated together to orient the surface of junction in the direction of inclination of the punch, and the two portions are independently rotated the same amount in opposite directions as a function of the desired angle of inclination of the punch.

Abstract: A multipiece spray assembly is disclosed which provides an annular axially and radially inwardly inclined nozzle passage operative to rapidly and efficiently apply a substantially complete and uniform coating to the inner surfaces of a forming cavity. Additional nozzle means may also be provided to simultaneously coat an overlying forming tool.

Abstract: Apparatus for producing moldings from a dry, particulate or granular material such as a ceramic molding composition, comprises a first mold half carried on the base of a press, while a vacuum shooting head, a second mold half and a removal head are carried on a movable carriage supported by a press head of the press. The carriage is displaceable transversely of the pressing direction so that the vacuum shooting head, the second mold half, and the removal head can be successively brought into alignment with the first mold half to allow the molding process to be performed rapidly and continuously without long gaps in the successive pressing stages.

Abstract: A hot isostatic pressing apparatus equipped with at least one hot isostatic pressing vessel having a detachable bottom lid and at least one cooling or preheating cylinder or hot isostatic pressing vessel arranged substantially on a central horizontal extension of the former vessel, which apparatus includes a rail provided in front of the former vessel and cylinder or the latter vessel with an interval between the rail and the former vessel and the cylinder or the latter vessel; and a carrier capable of reciprocally travelling between the former vessel and the cylinder or the latter vessel and including a lift frame, a lift provided with the frame and a bottom lid cradle, the cradle being provided in the form of a cantilever with lift and extending to a point underneath the former vessel when the carrier assumes a position in front of the former vessel and to another point underneath the cylinder or the latter vessel when the carrier assumes a position in front of the cylinder or the latter vessel.

Abstract: A process of consolidating and compacting unconsolidated particulate materials such as powders with or without short fibers to a density of about one hundred percent by carrying out the process in a can or tube which is moving through a convergent die having an angle of convergence of less than 90.degree..

Abstract: An apparatus for molding complex powder articles having a two part dilatant mold resiliently coupled. The two halves of the mold are resiliently pressed into physical contact with each other by external means. A vacuum pump connected to the mold produces a fluidized powder material flow from a powder feed mechanism into the mold cavity. A vibrator vibrates the mold during the filling of the mold cavity with powdered material with a force sufficient to slightly separate the two halves of the mold cyclically dilating the volume of the mold cavity. The dilation of the mold cavity in combination with the fluidized powder feed permits the mold cavity to be uniformly filled with powder material. Dilation of the mold cavity also compacts the powder material received in the mold.

Abstract: A plant for cold isostatic pressing of powder to pressed bodies includes a dry isostatic press, a plurality of press tools, a circulation conveyor path (2) for the tools and means for advancing the tools (3) along the path (2). The path (2) includes a first and a second straight section (21,22). On one side of the press there extend a plurality of third straight mutually parallel conveyor sections (23) at right angles to the sections (21,22). Each such third conveyor section (23) extends through an associated filling station (10). A plurality of fourth conveyor sections (24) extend parallel and at right angles to the first and the second conveyor sections (21,22) on the other side of the press. Each fourth conveyor section (24) extends through an associated emptying station (11).

Abstract: A hot isostatic pressing apparatus equipped with a pressure vessel, a heat-insulating layer provided within the pressure vessel and a heating unit disposed inside the heat-insulating layer, in which the heating unit is formed of a cylindrical, self-standing and single-stage heater mounted on an electrical insulator, which is in turn provided in a low-temperature zone of the pressure vessel, and a convection-promoting cylinder provided inside the heater with its lower part supported on the electrical insulator, wherein the upper extremity of the convection-promoting cylinder is located above the upper extremity of the heater, and the convection-promoting cylinder defines a gas flow passage in the lower part thereof. Owing to the provision of the convection-promoting cylinder, the effective height of the uniform temperature zone, namely, the treatment spacing in the pressure vessel is increased by 1.5-3.

Abstract: A transmission member of the kind comprising a floating core free to move in all directions within a casing, the floating core comprising at least two arms disposed at an angle to one another, one for supporting a driven member, the other for actuation by a driving member, and the casing comprising an internal housing with a configuration which duplicates that of the floating core. Between the floating core and the walls of the internal housing is disposed there is disposed an insulating layer of a solid elastic material. Use of the transmission member is directed, in particular, to ultrasonic assistance in compacting or drawing.

Abstract: A moulding tool unit for semi-isostatic compaction of a powder has a mould cavity (14) defined by an elastomeric jacket (121). The jacket (121) is surrounded with clearance by an elastomeric sleeve (122) which is sealingly joined to the jacket (121). The space (123) between the sleeve (122) and jacket (121 ) is filled with an isostatic pressure translating medium such as a hydraulic liquid (127). The jacket (121) may be supported in a direction towards the sleeve (122) by a stiff jacket (125) having perforations (126) through which the hydraulic liquid (127) can flow. The unit is adapted such that for a pressing operation it can be inserted with a small clearance and pressurized in the dry pressing chamber of a hydraulic press.

Abstract: A hot isostatic pressing apparatus which includes a pressure vessel, a heater and a heat-insulating layer interposed between the pressure vessel and heater. The heat-insulating layer is formed of at least two layers, i.e., an inner layer and outer layer. The inner layer embraces an object, which is under treatment, and the heater. The inner layer is loadable in and unloadable from the pressure vessel together with the object and heater while maintaining a space, which is embraced by the inner layer, in a state hermetically isolated from the surrounding atmosphere. However, the outer layer is held within the pressure vessel. When the hot isostatic pressing apparatus is incorporated in a modular HIP system, the cooling time is considerably shortened and the efficiency of the HIP treatment is hence improved to a considerable extent.

Abstract: A method and apparatus for manufacturing a multilayer powder blank, and the product of such manufacture which is suitable for subsequent extrusion. A hollow cylindrical container with its central axis oriented horizontally is rotated while powder is allowed to fall from a powder distribution tube in the center of the container downward onto the inner surface of the rotating wall, thereby forming successive layers of powder which are maintained in position by centrifugal forces acting thereon. The powder blank consisting of the multiple layers is removed from the container, isostatically compressed, and finally sintered, with fusion of the outer powder layers into a fused, water-tight coating.

Abstract: A press designed for producing true-to-size workpieces from powder material has upper and lower platens, a base plate, a die support plate and a lower stamp, which is moved hydraulically in translation in relation to the base plate and the die plate. The die plate and the base plate are parts of a frame structure using pull-rods and having the die plate and a lower joining plate as parts thereof. The frame structure is joined with the top platen of the press by way of a connection piece, which may be moved in translation in relation to the frame structure in the direction of pressing, whereas the lower platen of the press is joined up with the lower joining plate. To get an even density in the pressed workpieces and to make possible the use of modern electronic control systems the lower stamp of the press is made up of at least two lower stamp parts which are supported on machine parts.

Abstract: An electric hotplate formed by taking a heating element comprising an unsheathed resistance wire which exhibits a substantial increase in resistivity within an increase in temperature thereof; an insulating material around the wire and a casing enclosing the wire; and insulating material, locating said element in a mass of metal powder, compressing the solid mass to form a body containing said element, and heat treating the body to cause bonding between the powder particles and to form an electrical hotplate having said element embedded therein.

Abstract: A method of manufacturing molded articles of metal alloys, especially of nickel-base alloys, chromium-base alloys, titanium-base alloys, and dispersion-hardened alloys. A powder of the alloy, or a blend of powders of alloy constituents, is mixed with one or more plastics, selected from thermoplastics, duroplastics, and internal lubricants to form an injectionable granulate compound, the plastic content amounting to about 30% to 50% by volume. The compound is prepared by dissolving the plastic in a solvent which will not attack the base material of the alloy, and by blending it with the metal powder, after which the solvent is evaporated. The injectionable granulate compound is then injection molded to form a molded article. By heat treatment at 600.degree. C. or below in inert gas the plastic is eliminated from the molded article. The article is then sintered. To improve its strength, the article may subsequently be subjected to hot isostatic pressing.

Abstract: Am improved press for molding ceramic material which has a base frame on which a first carrier is rigidly mounted and which fixedly supports a stationary punch. A stripper platen is slidably movably supported on said first carrier and is adapted to be reciprocated therein by third piston and cylinder means mounted in said first carrier. The stripper platen includes an annular chamber disposed around the stationary punch for receiving granular ceramic material from a hopper mounted in the base frame. A second carrier is also rigidly mounted in the base frame and supports first and second cylinder and piston means. The first cylinder and piston means serves to support a movable punch which exerts the main molding pressure on the ceramic material when the stationary and movable punch are in the molding position. The second cylinder and piston serve to move the movable punch towards and away from the stationary punch and to exert supplemental pressure on the movable punch during the molding process.

Abstract: In a die, punch and core rod assembly for a powder compacting press wherein the core rod or rods remain stationary while the punch or punches are reciprocable relative to the die, the invention provides individual longitudinal position adjustment for the core rods by clamping the end of the core rods in a collet-like threaded member such as a slotted set screw threading in a threaded bore in a core rod support member. The core rod support member is preferably in the form of a pair of plates one bolted below the other. The end of each core rod is immobilized in its adjusted position by being disposed in an axial bore in the collet-like threaded member and by being clamped between the sidewalls of a longitudinal slot extending part of the length of the set screw, as a result of the tendency of the slot to close when the set screw is driven through the lower plate with its tapered end engaged with a tapered surface at the end of an aligned bore in the upper plate.