Dynamic pressure bearing (10), including: a green compact (10′), as a base material, of raw material powder including metal powder capable of forming an oxide coating; and dynamic pressure generating portions (A1 and A2) formed through die molding on an inner peripheral surface (8a) forming a radial bearing gap with an outer peripheral surface (2a1) of a shaft to be supported, that is, a shaft member (2). An oxide coating (11) is formed between particles of the metal powder by subjecting the green compact (10′) to steam treatment, and the dynamic pressure bearing (10) has a radial crushing strength of 150 MPa or more.

In molding a compact having portions of an equal thickness on opposite sides of a through-hole, an advancing speed of a holder holding a powder material is adjusted before the holder is advanced and retracted over a die cavity of a die. Specifically, a first preparation of determining in advance a relation between the advancing speed of the holder and a packing density of the powder material packed in the die cavity at each of the portions to be of an equal thickness of the compact on opposite sides of the through-hole is made; and, based on the relation determined in the first preparation, the advancing speed of the holder is adjusted to a speed at which the packing density becomes uniform. Thus, the packing density of the powder material packed in the die cavity can be uniformized, so that the dimensional accuracy of the molded compact can be improved.

Power transmission members, such as synchronous joint members, are each formed by sintering a compact which is molded from a mixture containing metal powder and a binder, as an injection material, by metal powder injection molding. Flow promotion recesses configured to facilitate a flow of the mixture to areas corresponding to power transmission surfaces or the like when the compact is molded are formed in each of two side surfaces of each power transmission member.

There is provided improved laser sintering systems that increase the powder density and reduce anomalies of the powder layers that are sintered, that measure the laser power within the build chamber for automatic calibration during a build process, that deposit powder into the build chamber through a chute to minimize dusting, and that scrubs the air and cools the radiant heaters with recirculated scrubbed air. The improvements enable the laser sintering systems to make parts that are of higher and more consistent quality, precision, and strength, while enabling the user of the laser sintering systems to reuse greater proportions of previously used but unsintered powder.

A powdery-material feeding device is configured to feed a powdery material to a compression-molding machine configured to obtain a molded product by filling a die bore with the powdery material and to compress the powdery material with punches. The powdery-material feeding device includes a detector configured to detect a biologically-originated foreign matter mixedly contained in the powdery material to be fed to the compression-molding machine, and a controller configured to control to remove the powdery material mixedly containing the biologically-originated foreign matter detected by the detector to avoid feeding of the powdery material mixedly containing the biologically-originated foreign matter to the compression-molding machine, or to control to stop the feeding of the powdery material to the compression-molding machine.

Systems of electrical devices with high-resolution components and methods of fabricating the electrical devices using micro-molding processes are described. Small foot print electrical devices can be achieved by fabricating components with highly conductive materials, and with closely spaced components.

A method for manufacturing a tip for cutting tool use includes a shaping step of injecting a material into a mold to thereby form a molded body which becomes a tip for cutting tool use. The shaping step injects the material into the mold through a gate located on the inner side of a part corresponding to an intersecting ridge part formed by a major surface and an outer peripheral surface of the tip for cutting tool use.

A manufacturing system according to an aspect of the present disclosure includes: a molding apparatus configured to uniaxially press raw material powder containing metal powder to fabricate a powder compact whose whole or part has a relative density of 93% or more; a robot processing apparatus including an articulated robot configured to machine the powder compact to fabricate a processed molded article; and an induction heating sintering furnace configured to sinter the processed molded article by high frequency induction heating to fabricate a sintered product.

A manufacturing system according to an aspect of the present disclosure includes: a molding apparatus configured to uniaxially press raw material powder containing metal powder to fabricate a powder compact whose whole or part has a relative density of 93% or more; a robot processing apparatus including an articulated robot configured to machine the powder compact to fabricate a processed molded article; and an induction heating sintering furnace configured to sinter the processed molded article by high frequency induction heating to fabricate a sintered product.

Metal composites, tooling and methods of additively manufacturing these are disclosed. Metal objects and structures as provided herein are additively manufactured from metal having an infill pattern infiltrated with a metal powder. Also provided herein are methods of forming such objects and structures. Methods include additively manufacturing a metal structure having an interior printed using an infill. Steps can further include infiltrating the printed infill of the structure with a powder metal thereby forming a composite.