A method of making a sintered body includes a step of preparing raw material powder containing powder of inorganic material, a step of producing a powder compact having a high-density portion with a relative density of 93% or more and a low-density portion with a relative density of less than 93% by compressing the raw material powder injected into a mold, a step of producing a machined compacted part by machining at least the high-density portion of the powder compact, and a step of sintering the machined compacted part to make a sintered body, wherein a perimeter shape of a cavity constituted by the mold in a cross-section perpendicular to an axial direction of the mold is such than a maximum stress applied to an inner perimeter surface of the mold during a compacting process using the mold is less than or equal to 2.6 times an imaginary maximum stress that is applied to an inner perimeter surface of an imaginary mold during a compacting process using the imaginary mold, the imaginary mold having an imaginary cavity that has a same area as the cavity and that has a circular perimeter shape.

The invention presented is a die filling apparatus that includes a unique powder feed assembly that includes a novel plurality of vertically stacked drive gear-feed gear pairs that move filling powder through a series of sieves into a die used for compressing powder into a tablet. At least the bottom feed gear includes a plurality of logarithmic vanes or blades with an offset axis of rotation. Also presented is a method to fabricate pellets from powder using an apparatus to form a pellet.

The invention presented is a die filling apparatus that includes a unique powder feed assembly that includes a novel plurality of vertically stacked drive gear-feed gear pairs that move filling powder through a series of sieves into a die used for compressing powder into a tablet. At least the bottom feed gear includes a plurality of logarithmic vanes or blades with an offset axis of rotation. Also presented is a method to fabricate pellets from powder using an apparatus to form a pellet.

The present invention relates to a powder dry-pressing molding device and method. The powder dry-pressing molding device includes a rack, the rack is provided with an first pressure mechanism, a workbench mechanism and a second pressure mechanism in sequence along an up-and-down direction, and one side of the workbench mechanism is provided with a scraping mechanism; the first pressure mechanism includes an upper slide block capable of moving up and down, and an upper punch is disposed at a bottom of the upper slide block; the workbench mechanism includes a middle mold seat, a workbench is fixed above the middle mold seat, a middle mold is disposed inside the middle mold seat, and a mandrel runs through the inside of the middle mold; the second pressure mechanism includes a lower slide block capable of moving up and down, a lower punch is fixed at the top end of the lower slide block, and the lower punch is capable of extending into a compacting space between the mandrel and the middle mold; and the scraping mechanism includes a pusher connected with a scraping driving mechanism and capable of moving along the workbench, the pusher is provided with a feeding channel capable of being communicated with the compacting space, and the feeding channel is capable of being communicated with a barrel disposed on the rack. The dry-pressing molding device of the present invention has a high degree of automation, can scrape the powder, and has a good processing effect.

The present invention relates to a mini hot press apparatus, and more particularly, to an apparatus which can be used for making or annealing a polycrystalline material by pressurization and heating in various surrounding environments such as in a low vacuum, high vacuum, ultrahigh vacuum, high pressure gas, gas flow, even in air, etc.

The present invention relates to a mini hot press apparatus, and more particularly, to an apparatus which can be used for making or annealing a polycrystalline material by pressurization and heating in various surrounding environments such as in a low vacuum, high vacuum, ultrahigh vacuum, high pressure gas, gas flow, even in air, etc.

A tooling inspection and analysis system measures tooling quality of a multi-tip tablet punch having a barrel with a plurality of tips each having a tip cup for forming a tablet. The system comprises a base. A carriage assembly has a cavity for supporting a multi-tip tablet punch, which when in use is aligned with an X-axis. A Y-axis linear slide mounts the carriage assembly to the base for movement relative to the base along a Y-axis. A sensor is adapted to measure distance. A Z-axis linear slide mounts the sensor to the base for movement relative to the base along a Z-axis. A programmable controller is operatively connected to the Y-axis linear slide, the Z-axis linear slide and the sensor. The controller is programmed to move the carriage assembly and the sensor to automatically align the sensor to measure working length of each tip of a multi-tip tablet punch mounted in the cavity.

The invention relates to a plane plate 1 for a pressing tool 2 of a press 3; wherein the plane plate 1 for activating a punch 6 of the press 3 by way of at least one lifting cylinder 4 can be displaced along an axial direction 5; wherein the plane plate 1 has an upper side 39 that points in a first axial direction 38 and a lower side 41 that points in a second axial direction 40 counter to the first axial direction 38, a link 34 to the at least one lifting cylinder 4, a centrally disposed receptacle 9 for contacting the punch 6 or a punch holder of the press 3, as well as at least a first at least partially cylindrical guiding face 7 which for contacting a first guide column 8 is parallel with the axial direction 5, and a second at least partially cylindrical guiding face 31 which for contacting a second guide column 37 is parallel with the axial direction 5; wherein on the lower side 41 of the plane plate 1 the first guiding face 7 has a first lower end 28 and the second guiding face 31 has a second lower end 32, wherein the first lower end 28 and the second lower end 3 in relation to the axial direction 5 are disposed at mutually dissimilar heights 29 and thus are disposed so as to be mutually spaced apart in the axial direction 5.

A pressing arrangement is disclosed, including a pressure vessel, a pressure medium supplying device configured to output a flow of pressure medium, and a pressure medium accumulator. In an embodiment, the pressure medium accumulator is positioned intermediate the pressure vessel and the pressure medium supplying device.

Device for pressing a non-hardened concrete composition into a desired form includes an upper plate with first cavities running through the upper plate, a moulding plate with one or more second cavities whereby the upper plate is located directly above the moulding plate, a bottom plate located under the moulding plate whereby the bottom plate closes the one or more second cavities on the bottom, whereby the upper plate and the moulding plate can move horizontally in relation to each other between a first position in which the one or more first cavities are directly and exactly above the one or more second cavities and a second position in which the one or more first cavities are not above the one or more second cavities, wherein the thickness of the upper plate and not the thickness of the moulding plate is decisive for the thickness of the final article.