A preformed chip manufacturing apparatus includes a magnetic fixing suspension device including a pair of magnets which are a first magnet and a second magnet between which a magnetic field is formed for enabling a soft magnetic powder to be suspended therein, and a pair of punches configured to pressure mold the soft magnetic powder suspended in the magnetic field.

A compression-molding method for a permanent includes: providing a drive coil to generate an electromagnetic force when a transient current is passed into the drive coil, so as to apply a molding compression force to magnetic powder under compression, and providing an orientation coil to generate an orientation magnetic field when a transient current is passed into the orientation coil, thereby providing the magnetic powder under compression with an anisotropic property; and synchronously passing the transient currents to the drive coil and the orientation coil to synchronously generate the electromagnetic force and the orientation magnetic field, thereby completing compression-molding of the permanent magnet, wherein a magnitude of the electromagnetic force and an intensity of the orientation magnetic field are respectively changed by changing peak values of the transient currents.

Disclosed herein is a method and apparatus for forming pellets in a non-ambient environment such as a strong magnetic field. The apparatus includes a die body, a die bottom, a short push pin, a long push pin, a press tube, and an extended push pin. A powder is loaded into the die body, which is then positioned in the non-ambient environment, and the powder allowed to equilibrate. A pellet is then formed by pressing on the extended push pin while the powder is in the non-ambient environment.

A compression-molding method for a permanent includes: providing a drive coil to generate an electromagnetic force when a transient current is passed into the drive coil, so as to apply a molding compression force to magnetic powder under compression, and providing an orientation coil to generate an orientation magnetic field when a transient current is passed into the orientation coil, thereby providing the magnetic powder under compression with an anisotropic property; and synchronously passing the transient currents to the drive coil and the orientation coil to synchronously generate the electromagnetic force and the orientation magnetic field, thereby completing compression-molding of the permanent magnet, wherein a magnitude of the electromagnetic force and an intensity of the orientation magnetic field are respectively changed by changing peak values of the transient currents.

The disclosure provides a method for preparing a radiation-oriented sintered arc-shaped Nd—Fe—B magnet. The method comprises: providing a Nd—Fe—B powder and a molding device; performing a first sub-step of align pressing including filling the arc-shaped cavity of the molding device with a first powder loading of the Nd—Fe—B powder, performing a first magnetization of the Nd—Fe—B powder, and mold pressing the Nd—Fe—B powder to form a first green body; performing a second sub-step of align pressing including filling the arc-shaped cavity of the molding device with a second powder loading of the Nd—Fe—B powder, performing a second magnetization of the Nd—Fe—B powder, and mold pressing the Nd—Fe—B powder to form a second green body; and sintering and annealing the second green body to obtain an arc-shaped Nd—Fe—B magnet. Further aspects of the disclosure are a molding device useful for the preparation method and a radiation-oriented sintered arc-shaped Nd—Fe—B magnet obtained by the method.

A rotary tablet press has a rotating mold table and top and bottom punches, which can move reciprocally in punch guides, coaxially with the molds. The reciprocating motion of at least the bottom punches is cam-controlled and these punches are acted upon by a releasable punch dampener to prevent an overshoot of their movement and to ensure an action which is as free from wear. It is as maintenance-free as possible whilst maintaining constant damping of the bottom punches. The releasable punch dampener releases with one motion and has a linear release shaft with a release surface and a dampening surface.

There is provided a production method and a production device for producing each of the rare earth sintered magnet sintered bodies without carrying a mold in a sintering furnace. The method includes feeding an alloy powder into a mold having side walls divided into two or more sections; filling the alloy powder into the mold to prepare a filled molded-body; orienting the alloy powder in the filled molded-body by applying a magnetic field to the filled molded-body to prepare an oriented filled-molded-body; detaching the side walls of the mold from the oriented filled-molded-body and retrieving the oriented filled-molded-body from the mold; and sintering the retrieved oriented filled-molded-body. The filling step and the orienting step are performed at different locations. A pulsed magnetic field can be applied in the orienting step and inside of the mold can be partitioned into a plurality of cavities by partitions.

Disclosed herein is a method and apparatus for forming pellets in a non-ambient environment such as a strong magnetic field. The apparatus includes a die body, a die bottom, a short push pin, a long push pin, a press tube, and an extended push pin. A powder is loaded into the die body, which is then positioned in the non-ambient environment, and the powder allowed to equilibrate. A pellet is then formed by pressing on the extended push pin while the powder is in the non-ambient environment.

A rotary tablet press has a rotating mold table and top and bottom punches, which can move reciprocally in punch guides, coaxially with the molds. The reciprocating motion of at least the bottom punches is cam-controlled and these punches are acted upon by a releasable punch dampener to prevent an overshoot of their movement and to ensure an action which is as free from wear. It is as maintenance-free as possible whilst maintaining constant damping of the bottom punches. The releasable punch dampener releases with one motion and has a linear release shaft with a release surface and a dampening surface.

A system and method for an improved material flow through an extrusion machine by altering the material properties in a magnetic field are provided. The electromagnetic extrusion system includes a ram that is moved into a chamber containing an extrusion material to force the extrusion material out of an opening defined, at least in part, by a die to create an extrusion with a cross-sectional shape corresponding to the predetermined shape of the opening. An electromagnetic winding of electrically conductive material is embedded within a tool retainer block surrounding the container and is helically wound about the chamber and carries a DC electrical current to generate a magnetic field having a magnetic flux density of at least 2 Tesla within the extrusion material to dissipate dislocation defect structures in the extrusion material being extruded via the magnetoplasticity effect. The magnetic field therefore provides for reduced flow stress on the tooling.