Abstract: A process for making a component includes the steps of: depositing a layer of a porous material; positioning a mask near to the deposited layer; applying a bonding material that will cause any contacted portions of the porous material to become bonded together, over and through the mask, such that the bonding material is applied to one or more selected regions of the recently deposited layer of porous material; and repeating the foregoing three steps a selected number of times to produce a selected number of successive layers, said bonding material causing each of said successive layers to become bonded to an adjacent layer. Any unbonded porous material that is not at the selected regions is easily removed. The mask may be an open stencil mask, or a screen mask. If open stencil masks are used, there may be more than one mask for a single layer of porous material. Successive masks may be positioned by a continuous sheet, a rotating disk, or individually, such as by a robot.

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 powder feed system for delivering a quantity of particulate material to a die cavity of a powder press is provided. The powder press has a table-like platen surface which is flush with and surrounds a die in which the die cavity sits, an upper punch appending from an upper ram and a lower punch. The powder feed delivery system includes a receptacle for receiving and delivering particulate material to the cavity. The receptacle has an ingress through which particulate material is received under pressure and an egress for registering with the interior of the cavity and through which particulate material is delivered under pressure from a feed conduit to the cavity. The feed conduit is attached at a first end to the receptacle ingress. At least one pressure generator is attached to a top end of a pressure vessel attached at a second end to the feed conduit.

Abstract: A method and apparatus for filling a cavity with powder wherein a pipe having holes for discharging gas is disposed in a powder box and gas is discharged into the powder in the powder box as the powder enters the cavity so that particles of the powder are movable relative to each other. Due to the gas discharge, the powder can enter the cavity smoothly without whirling up in the cavity and settling unevenly, so that a filling time period is shortened and a particle size distribution in the cavity is uniform.

Abstract: A press for producing compacts from powdery material. The press has a die with a cavity that receives particles therein. A lower punch moves towards an upper punch to press the particles within the cavity. A cam disk moves the lower punch by way of a movable base-plate. Motion is transmitted through a sliding block to the base-plate and a cylinder having a piston causes movement of the die during at least a portion of the movement of the lower punch over its path of travel to the upper punch.

Abstract: A raw material delivery system is disclosed. It is used with a press of the type used to compact raw material in a die. The press has a horizontal table with an opening in which the die is held. A feed shoe is movable across the table between an extended position where a central bore of the feed shoe overlies the die and a retracted position where the central bore is aligned with a bore in a bridge. A vertically movable feed tube is carried on the bridge, and has a passage through which raw material may pass. The vertically movable feed tube receives raw material from a vertically fixed feed tube received telescopically within the vertically movable feed tube. A valve is between the two feed tubes. A valve may be provided between the bridge and the feed shoe so that the raw material passes through this interface without being exposed to cross-ventilation.

Abstract: There is described a form tool for compression forming a molded body having a circular cylindrical through hole with at least one helical groove from a sintering powder, which form tool has a mantle (1) with an inserted mold core (2), which forms at least one flight (3) protruding against the mantle (1) for forming the groove of the molded body, and a ring-shaped plunger (6) engaging in the mold cavity (5) between the mantle (1) and the mold core (2). To create advantageous constructional conditions, it is proposed that the axial length of the flight (3) of the mold core (2) should correspond to the axial length of the molded body, and that the mold core (2) should have an axial web (4) continuing the flight (3), which axial web engages in an adapted axial groove of the ring-shaped plunger (6).

Abstract: A method of producing a green compact which includes the steps of forming a generally homogeneous powder blend of powder components; consolidating the powder blend into a green body wherein the green body includes a flashing; impinging the green body with a fluid stream so as to dislodge the flashing; and removing the dislodged flashing from the surface of the green body.

Abstract: A sealing device for preventing leakage of pressure in pressure-processing a workpiece to be processed under isostatic pressure in a high pressure vessel, includes a ring member fitted to the opening/closing end of the vessel. When a cover is closed, an axial seal ring and a plane seal ring are mounted, with the plane seal ring adhered to the cover.

Abstract: Apparatus is disclosed for producing composite cylinders having cylinder walls comprised of two adjacent diverse layers of metal material which are bonded together by application of radial forces thereto and then sintered to complete the bonding process. Mechanical locking of the layers is achieved by grain interlocking between the two layers of metal material.

Abstract: In an apparatus for producing a three-dimensional object by laser sintering the object is produced by successive solidification of layers of a powder material at points corresponding to a cross-section of said object using radiation for solidifying said powder material. The apparatus includes a support having a substantially plane upper side for supporting the object, a material applying device for applying a layer of the material onto the upper side or onto another layer formed on the upper side, and a solidification device for solidifying a layer of the material by irradiation. The material applying device has a coating device and a drive for displacing the coating device in a direction parallel to the upper side of the support.

Abstract: Disclosed is a manufacturing process of a sintered connecting rod assembly comprising a first member with a projection and a second member with a concavity in which the first member and the second member are mated with each other by engaging the projection with the concavity. A powdered raw material is compacted into a first compact and a second compact for the first and second members, wherein the projection of the first compact has a width slightly larger than the width of the concavity of the second compact. Then the projection of the first compact is engaged with the concavity of the second compact to mate the first compact with the second compact, thereby the projection and the concavity are tightly pressed against each other. After sintering the mated first and second compacts, they are forced to release the projection from the concavity. The die for compacting the raw material has a whole cavity and a removable core for dividing the whole cavity into two cavities.

Abstract: An apparatus for producing a green compact includes a circuit that circulates die assemblies, each of which contains a rubber mold having rubber in at least its side portion. The apparatus also includes a high density filling device that has a feeder for feeding powder into the rubber molds; a pusher or a vibrator or both a vibrator and a pusher; a die press machine configured to impart a compaction force sufficient to produce the green compact to each of the circulating die assemblies in succession; and a device for removing the green compact from each rubber mold. The high-density filling device, the die-press machine and the removing device are successively arranged along the circuit. Each of the circulating die assemblies has sufficient structural integrity to withstand the compaction force because all structure necessary to withstand the compaction force is present in the circulating die assemblies.

Abstract: A slide opening system for a tool system for compacting powdery materials having an upper ram, a lower ram and an insertable tool frame in which punch holders are moved relative to the base-plate from their filling position downward to the pressing position and from the pressing position upward to the ejection position which corresponds to the filling position (ejection method), and a further punch holder is moved from the filling position downward to the pressing position and from the pressing position downward to the withdrawal position (withdrawal method), with plungers acting on slides for releasing the withdrawal plate for the withdrawal motion, whereby the plungers of the slide opening system each act on a preferably stepped slide via a pivoted lever in the form of a cam disk with leverage that changes during the opening process and at least one roll located on the lever.

Abstract: An apparatus and a method for forming compacts having reduced elephant's feet effect is disclosed. The apparatus includes a press for dry bag isostatic pressing, the press body having a cavity with at least one open end formed therein, an elastic mould, operatively positioned inside the cavity for compacting metal powder, means, operatively connected to the mould for expanding the mould and compacting the metal powder, and at least one press member having a base section substantially normal to the cavity and an insert section extending from base section into the cavity, the insert section being formed in the shape of any one of a plurality of geometric shapes.

Abstract: A process for producing sintered parts with high wear resistance and good dynamic strength properties from formed bodies, which have been pressed as green parts from a completely-alloyed air-hardened heat-treatment steel powder with a carbon content of at least 0.3% added in the form of graphite. The process includes sintering the parts under protective gas at a sintering temperature of at least 1000.degree. C. and subsequent cooling. The sintered parts are cooled immediately after sintering from the sintering temperature to a first holding temperature in the range of Ar.sub.3 to a maximum of 150.degree. C. above Ar.sub.3 and are held for a first holding period of 5 to 25 minutes at this temperature (austenitizing phase). Immediately after this, the sintered parts are cooled in accelerated fashion to a second holding temperature by convective gas cooling and are held at this temperature for a second holding period.

Abstract: The disclosure relates to a method of binder removal from a green body before sintering or the like wherein the green body is initially heated to a temperature above the melting or flow point of the binder to liquify the binder and, at the elevated temperature, a small portion of the green body is brought into intimate contact with a non-supporting porous body of lower capillarity potential for the liquid binder. The liquid is drawn from all parts of the green body to the region of contact between the porous body and the green body and enters the body of lower capillarity potential preferentially, removing liquid from the green body through the surface of the green body only at said region of contact. The draining is continued with or without further increase in temperature until the green body is opened or becomes permeable.

Abstract: A die control speed rate conversion device for a powder mold press wherein the timing for oil release from a hydraulic circuit can be obtained by the angle signal (position signal) from a rotary encoder on the main axis of the press actuating synchronously with an upper punch, and the speed of descent of a die relative to an upper ram can be controlled at any rate ranging from 1:1 to 1:1/4 by a sevomotor controlled by the signal from a linear sensor detecting the movement of the upper ram.

Abstract: A method and apparatus for manufacturing a powder metallurgy article comprising two or more individually compacted layers is described. The apparatus includes a number of powder deposition means for depositing powder into at least one die cavity, the number of powder deposition means corresponding to at least the number of different powder compositions in an article being compacted, a die assembly having a female die body which is moveable with respect to a first press ram, a mechanically driven second press ram, means for driving said second press ram, control system means for controlling the relative positions and movements of said female die body, said first press ram, said second mechanically driven press ram and said powder deposition means such that they operate in synchronism, characterised by said control system means including an angle counter having proportional drive means from the press apparatus such that one cycle of the angle counter corresponds to a required number of press compaction strokes.

Abstract: A powder molding press machine is provided with a main body, a plurality of punches provided for the main body and punch operating means for operating the punches. The plurality of punches are assembled into a punch unit so as to allow the punches to move reciprocally, the punch operating units are attached to the main body for individually reciprocating each of the plurality of punches, the operating units having operational end portions corresponding to the plurality of punches. The punch unit is rotated relative to the punch operating units so as to connect the plurality of punches to the corresponding operational end portions.

Abstract: An apparatus for use in hot pressing metal alloy foils, such as by HIP, directly from metal alloy powders. The invention is a metal container with a cavity having near-net shape of a thin metal foil. The cavity may be lined with a diffusion inhibiting material, so as to inhibit the interdiffusion between the metal container and the metal alloy powder during hot pressing. The apparatus also may include an integrally formed orifice for evacuating the metal container.

Abstract: A powder molding press a die plate provided with a die having a die hole, a punch device to be inserted into the die hole and a hydraulic cylinder device attached to the punch device for driving the same, the hydraulic cylinder device being arranged coaxially with the punch device. A movable punch plate may be disposed on one side of the die plate in parallel thereto with a predetermined space and a punch adapter for securing the punch device to the punch plate may be also disposed. The punch device includes a plurality of punches disposed axially in series.

Abstract: A tool set type powder compacting press is proposed which is simple in construction and reliable. The driving shafts coupled through coupling shafts with the tool holding plates, that is, the punch plates are provided at the press side. Further, coupling mechanisms having removable joints are provided between the driving shafts and the punch plates. No driving device is provided at the tool set side. Since the driving mechanisms are integrated at the press side, the whole arrangement will have a simple construction. This will also increase the reliability.

Abstract: The invention provides a press for powder metallurgy in which a die set installed between an upper ram and a lower ram of a main body of the press can be easily fixed or removed and the accuracy of the molded product is improved. An upper part of the lower ram to which a yoke plate of the die set is installed or is provided with a gap adjusting screw displaceable with thread engagement in vertical direction. A hydraulic actuator or other rotary driving device is fixed to a lower part of the lower ram. A driving shaft of the rotary driving device is connected to the gap adjusting screw by a connecting shaft which passes through an axial center of the lower ram. When the die set is installed in the main body of the press, the gap adjusting screw is retracted within the lower ram so as to assure a sufficient gap between the yoke plate and the lower ram.

Abstract: A metal shavings and chips compactor for extruding oil from metal chips and shavings and compacting the metal into easily transportable pellets. A compactor cylinder contains a piston and has an opening through which an auger feeds metal chips and shavings. A gate closes an end of the cylinder. A first hydraulic drive drives the piston under low pressure to close the opening and apply a first compacting pressure on the metal to form a loosely compacted pellet in the cylinder. High pressure then operates the piston to form a compact metal pellet substantially void of interstices. A second hydraulic drive opens the gate; the piston is operated at low pressure to discharge the compact metal pellet from the chamber and oil is collected below the cylinder. The compacting pressures are achieved through mechanical advantages provided by the size of the piston to that of the first hydraulic drive.

Abstract: To form and compact a powdered metal workpiece (W) having an outer spiral circumference, for example a helical gear, the apparatus has a press mold (21) in a compaction press. This mold can be used for manufacture or for sizing or calibrating workpiece dimensions. A first rotatable and axially movable plunger, punch or ram (16) is movable towards the press mold, and a second rotatable or axially movable plunger or punch or ram (27) is movable through the press mold. To ensure and control rotation of the first (16) plunger, a helical cam system (13, 15) formed by a core element (15) having a spiral outer contour in engagement with a matrix or nut element (13) is provided, the system being coupled to the first plunger (16) by a gear transmission (11, 12) coupled to the matrix element and to the first plunger, punch or ram (16).

Abstract: A magnetic circuit component molding device for integrally molding a compound a center yoke with a ring-shaped magnet includes top and bottom press vertically arranged at opposed positions. A ring-shaped magnet is place on a bottom die between top and bottom press. The top and bottom press compress the compound against the ring-shaped magnet ring with a vertical pressure. A holder unit, separated in plural segments, having tapered outer circumferences is provided around the ring-shaped. A holder presser having a tapered inner circumference is mounted on the holder unit as tapered portions thereof are engaged together. A portion of the vertical pressure, when the top press compresses the compound, is transferred by springs 10 to the holder presser, and is amplified by the tapered portions and applied to the outer circumference surface of the ring-shaped magnet by the holder unit.

Abstract: A powder molding press includes a die plate provided with a die having a die hole, a punch device to be inserted into the die hole and a hydraulic cylinder device attached to the punch device for driving the same, the hydraulic cylinder device being arranged coaxially with the punch device. A movable punch plate may be disposed on one side of the die plate in parallel thereto with a predetermined space and a punch adapter for securing the punch device to the punch plate may be also disposed. The punch device includes a plurality of punches disposed axially in series.

Abstract: High-pressure high-temperature device for conversion the graphite to diamonds (DCGD) includes a container having a high pressure chamber, an inlet for introducing a fuel, an oxidizer and an electrolyte respectively into container, a generator of instantaneous electro-impulses, electrodes secured to the container and connected with the generator of instantaneous electro-impulses to produce the power electro-discharge between electrodes. DCGD includes a source of a direct electro-current and a pair of positive and negative electrodes positioned within an electrolyte for heating the graphite in the high pressure chamber. The high-pressure chamber includes a cylinder-piston unit submerged within an electrolyte. The piston of cylinder-piston unit is explosively driven toward the high-pressure chamber by the combined action of electro-discharge in the electrolyte a combustion of fuel inside of container. DCGD may be adapted for compaction other materials, for extruding, forging and the like.

Abstract: A device for forming a two-tiered external helical gear, having upper and lower parts having pitch circles of different diameters, includes a die, an upper punch and a lower punch which are rotatable relative to one another, and a core. The die is formed on the inner periphery with helical teeth in two tiers. The upper and lower teeth have the same twisting direction and lead and have pitch circles of diameters corresponding to the diameters of the pitch circles of the upper and lower parts of the gear. The upper punch is formed on the outer periphery with helical teeth adapted to mesh with the first tier of helical teeth on the inner periphery of the die. The lower punch is formed on the outer periphery thereof with helical teeth adapted to mesh with the second tier of helical teeth on the inner periphery of the die. There is also provided a similar device for forming a two-tiered internal helical gear.

Abstract: An apparatus for the production of pellets of metal powder, more particularly pellets of highly active metal powder, for example Raney catalysts, has a press with a filling shoe and a pellet discharge shoot. A wet processing environment is established and thus no inert gas atmosphere is required to avoid oxidation of the metal powder.

Abstract: The present invention is directed generally to apparatus for and improvements in powdered metal consolidation processes, some of which referred to as "electroconsolidation" processes, and more particularly to processes employing specially shaped rams or electrodes and/or other press elements for imparting uniformity of electrical flux and/or pressure to a workpiece.Some embodiments of the improved process of the present invention contemplate controlling the degree of compaction by providing rams which generally conform to the shape of the preform. Such projections may be provided on the rams to selectively develop at least one zone of relatively high compaction within the die chamber, which results in certain embodiments associated with the electroconsolidation process in release of the major portion of the electrical energy within the zone having a relatively high degree of compaction.

Abstract: An apparatus for replacing the tool sets without requiring any fixing or removal of the fluid pressure pipes such as hydraulic hoses or the like when the tool sets are fixed to or removed from the main body of the power molding press. Swing arms 6 having arm lengths set therein are oscillatably and rotatably fitted to the arm shafts 5 vertically installed at proper side locations of the main body 1 of the press in such a way as the rotating radius of the arm shafts may overlap the mounting position of the main body 1 of the press. The extreme ends of the swing arms 6 are provided with supporting boxes 7 on which the tool sets 3 are mounted. Rotation of the swing arms 6 enables the tool sets 3 to be moved toward or away from the centeral part of the main body 1 of the press and then the tool sets 3 to be fixed to or removed from the main body 1 of the press.

Abstract: A system for heating and feeding polymer coated powder to a heated die cavity of a compacting press. The system includes at least one heated vertical pipe for heating the polymer coated powder and for delivering the polymer coated powder by gravity from source thereof to the entry end of at least one horizontally oriented auger conveyor. The at least one auger conveyor is heated and imparts heat to the individual powder particles through a mixing action. The at least one auger conveyor delivers the polymer coated powder to the heated hopper of a shuttle assembly. The shuttle assembly is shiftable between a retracted position wherein the polymer coated powder is discharged from the shuttle hopper to a heated powder ring, to an extended position wherein the polymer coated powder is discharged from the powder ring to the heated die cavity of the compacting press. The system heats the individual particles of the polymer coated powder to a temperature just below the coagulation point thereof.

Abstract: In a press forming apparatus for forming spiral parts, a plurality of first connecting rods are mounted on a lower end of a divided core divided from a die in shifting relation to each other in a winding direction of vortex. The plurality of first connecting rods are supported by a vertically movable core plate, while a plurality of second connecting rods are mounted on a lower end of a lower punch in shifting in position relation to each other. The second connecting rods extend respectively through bores in the core plate, and are supported by a lower punch plate movable vertically and arranged below the core plate. Further, the first and second connecting rods extend through a stationary block. The stationary block is arranged between the die and the core plate, for restricting downward movement of the lower punch and the divided core.

Abstract: A container for the high temperature, high pressure processing of workpieces is disclosed. Such container has a removable plug with a deformable seal permitting rapid access to the interior of the container following processing. The removable plug contains various access ports allowing continuous monitoring of the interior of the container, continuous evacuation of gases, and introduction of controlled processing gases as may be required for various workpieces.

Abstract: An apparatus for packing a permanent magnet powder wherein a solenoid coil is provided near the opening of a cylindrical molding space of a mold in such a manner that the direction of the central axis of the solenoid coil substantially coincides with the central axis of the molding space, and an alternating current magnetic field is applied, so that a permanent magnet powder above the opening is packed into the molding space. A magnetic pole may be provided in the center of the solenoid coil. The method of the present invention can be applied to not only a powder for a sintered magnet and cast magnet, but also a powder for a bonded magnet.

Abstract: The invention relates to a device for cooling of the furnace chamber (4) in a hot isostatic press by means of devices (7, 8) for circulation of a coolant in the furnace chamber (4), the coolant having a temperature which is lower, but not considerably lower, than the temperature of the articles.

Abstract: A hot-isostatic press adapted for rapid cooling of the hot zone after completed pressing and sintering of the material includes a pressure vessel, end closures, and a hot zone surrounded by thermal barriers. Between the thermal barriers and the pressure vessel with end closures there are colder spaces. At least one connection, located in the lower part of the thermal barrier and provided with a valve between the space next to the pressure vessel and the space below the bottom thermal barrier, is provided with an externally controllable valve. In the upper part of the thermal barrier there is an opening with a relatively large cross section and a valve is provided for the opening, which comprises a heat-insulated portion.

Abstract: A forming tool, used in the production of an anode before the firing, for forming peg holes with angularly grooved sidewalls, having a cap plate to which at least one retaining pivot, with one end attached and having a stop, which is fixed to the cap plate and limits the rotation of the forming body in one direction and an elastic means which on the one side is connected so as to be fixed to the cap plate and don the other side is connected to the forming body to preload the latter against the stop and ensure that its projections always form the grooves in the wall of the peg hole in the same angular position relative to the finished anode. As a result cleaning of the peg hole by an automatic cleaning machine is made possible.

Abstract: A mirror having optical quality reflective faces is prepared by pressing of metallurgical powders. An optical quality surface, free of scratches and irregularities, is formed by pressing the faces with an optical quality tool face, applied to the face at an acute angle to achieve a degree of metal flow. The mirror is progressively formed, by first pressing an assembly of powder to a "green" powder mirror, sintering the pressed powder, and then repressing the sintered mirror using a tool having optical quality surfaces on the faces contacting the mirror faces. The mirror is annealed, repressed with the tool having optical quality surfaces, and coated on the reflective surfaces with a thin metallic coating. This technique is particularly effective for preparing large numbers of mirrors with multiple facets requiring precise facet intersections, as the pressing tool can be adjusted to produce highly exact facet intersections which are then reproduced exactly in subsequent mirrors.

Abstract: Anisotropic rare-earth permanent magnets characterized in that an aggregate of a plurality of blocks, to each of which anisotropy is imparted, is formed using powders of magnetic material containing rare-earth elements, and the adjoining blocks are powder-metallurgically bonded together under pressure into one piece; a method of making anisotropic rare-earth permanent magnets by molding anisotropic blocks by magnetic-field molding, arranging, aggregating and sealing a plurality of blocks in a bag, and cold hydrostatic pressing the aggregate of blocks in the absence of magnetic field; and a suitable metal mold for magnetic-field molding anisotropic permanent magnets of a relatively large size.

Abstract: In a press having an upper punch and lower punch and a tool mount to be inserted into the press and connected to the lower punch via a lower coupling plate and to the upper punch via an upper joining piece, and a framework mounted displaceably on a base plate of the mount and consisting of connecting rods rigidly connecting the lower coupling plate with the matrix holding plate, die carriers being moved relative to the base plate from their filling position downward into the compacting position and from the compacting position into the ejecting position, which corresponds to the filling position (the so-called ejection method), at lease one additional die carrier, like the matrix holding plate, works by the withdrawal method, this die carrier being moved from the filling position downward into the compacting position and from the compacting position downward into the withdrawing position.

Abstract: The present invention relates to a method and apparatus for the manufacture of finished parts by the sintering of compacts which are formed as composite moldings of a pulverulent base material and at least one other pulverulent material, particularly different metal powders. The compacts are produced in the manner that at least one of the powder materials is introduced in pourable condition directly alongside of an already pre-compacted part of the compact into the mold which has a shell-shaped matrix and the powder materials are subjected together to final compacting by plug forces acting from on top and on bottom to the size desired for the sintering.

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: Disclosed is a device for manufacturing Nd-Fe-B alloy magnet materials, and in particular, for manufacturing an integral, columnar-ring-shaped Nd-Fe-B magnet which is multi-pole-magnetized along the circumference thereof and which is used as the rotor magnet of a high-efficiency stepping motor. The device of this invention is composed of a die punch, an upper and a lower punch having two concentric sections. The space is defined by the die and the upper and lower punches includes induction means for heating the green compact or the densified compact and sealing means for keeping the die under a reduced pressure condition or in an inert gas atmosphere.

Abstract: A pressure molding device having a powder supporting flat face formed by the end face of a pressure ram or a pressure-submissive block and a reciprocating vertical sleeve. The layer of powder formed on the flat face and having a uniform density is cut with the vertical sleeve's end for molding. A molded body has a uniform density in all portions and deformation does not occur in the course of sintering for producing semiconducting or insulating base boards.

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.

Abstract: Described herein is an interlock system for an isostatic press machine of the type including a high pressure container having upper and lower closure plugs releasably received in upper and lower openings to be used for loading and unloading work therethrough, and a holder frame for supporting the axial force of the container in an isostatic pressing phase of the press operation, the holder frame being pivotally supported at one side thereof for swinging movements about a vertical axis into and out of a holding position in engagement with the high pressure container, wherein the interlock system is provided with a lock mechanism constantly urged to lock the holder frame in the holding position, and a control means adapted to control the lock mechanism to maintain the lock on the holder frame when the internal pressure of the high pressure container is higher than a predetermined level and to release the lock when lower than the predetermined level.

Abstract: An interlocking device for a HIP equipment that prevents possible damage to the HIP equipment arising from use of a furnace or processing gas in error and can control the oxygen concentration and pressure within the HIP equipment. The device includes a sensor for detecting a concentration of oxygen in the processing gas in a processing gas pipe system. If the sensor detects an excessively high oxygen concentration, a supply side interlocking mechanism closes a valve for the pipe system and disconnects a power source for a furnace in a high pressure vessel. A flow switch is connected to a safety pipe system having a safety device, and a thermocouple is provided for each of the safety and processing gas pipe systems and a relief pipe system.