Systems, devices, and methods are described for extruding materials. In certain embodiments, one or more hollow billets are loaded onto an elongate mandrel bar and transported along the mandrel bar to a rotating die. The billets are transported through fluid clamps, which engage the mandrel bar and provide cooling fluid to the mandrel bar tip, and through mandrel grips, which engage the mandrel bar and prevent the mandrel bar from rotating. One or more press-rams advance the billets through a centering insert and into the rotating die. A quench assembly is provided at an extrusion end of the extrusion press to quench the extruded material. A programmable logic controller may be provided to control, at least in part, operations of the extrusion press system.

Devices and processes for performing shear-assisted extrusion include a rotatable extrusion die with a scroll face configured to draw plasticized material from an outer edge of a billet generally perpendicularly toward an extrusion orifice while the extrusion die assembly simultaneously applies a rotational shear and axial extrusion force to the billet.

Systems, devices, and methods are described for extruding materials. In certain embodiments, one or more hollow billets are loaded onto an elongate mandrel bar and transported along the mandrel bar to a rotating die. The billets are transported through fluid clamps, which engage the mandrel bar and provide cooling fluid to the mandrel bar tip, and through mandrel grips, which engage the mandrel bar and prevent the mandrel bar from rotating. One or more press-rams advance the billets through a centering insert and into the rotating die. A quench assembly is provided at an extrusion end of the extrusion press to quench the extruded material. A programmable logic controller may be provided to control, at least in part, operations of the extrusion press system.

An extrusion press for producing metal extrudates by extruding a billet, the extrusion press comprising: a punch holder crosspiece which carries a punch and is adapted to be translated in two opposite senses of translation along a first extrusion direction; a billet holder loader adapted to be alternately positioned between a resting position and a loading position; wherein said punch holder crosspiece is translatable along a second direction, perpendicular to said first extrusion direction, between a first position thereof and a second position thereof; wherein when the billet holder loader is in said resting position and said punch holder crosspiece is in the first position thereof, the translation of the punch holder crosspiece along said first extrusion direction in a first sense of translation, or sense of extrusion, causes a push by said punch against said billet and the extrusion of said billet; characterized in that said extrusion press comprises restraining means adapted to mutually restrain said punch holder crosspiece and said billet holder loader; and in that when the punch holder crosspiece is in the first position, it is restrained to the billet holder loader by means of said restraining means so that the translation of said punch holder crosspiece from the first position to the second position causes the movement of the billet holder loader from said resting position to said loading position.

A helical friction extrusion machine comprises a first fixed beam and a second fixed beam being arranged fixedly, a moving beam fixed to an extrusion container and an outer sliding block fixed to a forward extrusion rod that is located between the moving beam and the outer sliding block, a first main cylinder and a second main cylinder connecting to outer sliding block to drive the outer sliding block to move being fixed to second fixed beam, a perforating cylinder located on a central axis and connected to a central sliding block being further fixed to second fixed beam, a rotating platform which a rotating extrusion rod being fixed to and driven by a driving device to rotate being mounted on first fixed beam, a perforating needle being connected to perforating cylinder and fixed to male die, female die being fixed to the rotating extrusion rod, and a hopper being located above the extrusion container.