An extrusion press for extrusion of a material to be pressed through a die has a recipient that holds the material to be pressed, and a module that can be displaced relative to the die. The module can be acted on, during extrusion, by an electric motor drive, with the force required for extrusion. The electric motor drive is connected to the module that is displaceable relative to the die, by a bearing unit that has play perpendicular to the force; and/or during extrusion, drives contraction devices for contraction of a region of a tension element that stands under tension, which element counters the force required for extrusion by tension, and/or is a linear drive, which displaces a module that is fixed in place relative to the die during extrusion and the module that is displaceable relative to the die during extrusion, relative to one another, during extrusion.

The invention relates to a tool unit (12) for an extrusion machine (1) with a scraping element (51), a tool element (49) with an expanding channel (50) receiving the scraped extrusion material (3) and a die (53). The tool unit (12) includes a receiving cage (42) with first and second receiving cage parts (43, 44). In the first receiving cage part (43) there is a tool element (49) inserted in a receiving channel (48). In the second receiving cage part (44) a receiving chamber (52) facing the first receiving cage part (43) is formed, in which at least the die (53) is received and supported by a support surface (56). In the tool element (49) as well as in the first receiving cage part (43) a common receiving groove (62) is formed with at least one groove base surface (63, 64), in which the scraping element (51) is inserted loosely and is supported. The invention also relates to an extrusion machine (1) as well as to a method for changing the friction wheel (4).

An Ni-based super heat resistant alloy extruded material manufacturing method includes: (1) obtaining an ingot by casting molten metal having a component composition of a precipitation-strengthened Ni-based super heat resistant alloy wherein the equilibrium precipitation amount of gamma prime at 700 C. is at least 40 mol % and using it as a billet, wherein the billet is heated to a hot working temperature that is at least 1030 C. and is less than the gamma prime solvus temperature of the alloy; and (2) inserting the billet that has been heated to the hot working temperature into a container, imparting a compressive force to the billet from one end side of the container, and extruding the billet at an extrusion rate of 10 to 300 mm/s from a hole in a die placed at the other end side of the container, to yield an Ni-based super heat resistant alloy extruded material.

A dummy block for a metal extrusion press includes: a generally cylindrical base having a forward surface and an outwardly extending circumferential flange; an expandable collar coupled to the base, the collar having an inwardly extending circumferential rib abutting the circumferential flange; a plunger disc seated against the forward surface of the base and accommodated by the collar, and a plunger shaft extending through the plunger disc and coupled to the base.

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.

Provided is a method of forming a cup-shaped aluminum-magnesium-alloy article by rotary extrusion, including the following steps. (1) Blanking. (2) Performing rotary extrusion: placing a cylindrical billet into a concave die cavity, wherein a peripheral wall of the cavity of the concave die is provided with at least two symmetrical axial grooves; inserting a convex die into the concave die cavity, wherein an end of a working region of the convex die is provided with a groove of a trapezoidal cross section; subjecting the convex die to forward extrusion and heating, and simultaneously rotating and heating the concave die, wherein an integral torque is formed during the extrusion process of the convex die by using the cylindrical billet inside the groove having a trapezoidal cross section, and wherein a synchronized rotation with the concave die is achieved by using a metallic billet that flows into the axial groove. (3) Demolding.

A dummy block for a metal extrusion press includes: a generally cylindrical base having a forward surface and an outwardly extending circumferential flange; an expandable collar coupled to the base, the collar having an inwardly extending circumferential rib abutting the circumferential flange; a plunger disc seated against the forward surface of the base and accommodated by the collar, and a plunger shaft extending through the plunger disc and coupled to the base.

An extrusion press die-slide device is equipped with: a fixed frame; a moveable frame that can move linearly but which is supported by the fixed frame in a non-rotatable manner; a first motion conversion mechanism that converts input rotational motion to linear motion and outputs the same to cause the moveable frame to move linearly with respect to the fixed frame; and a second motion conversion mechanism attached to the moveable frame and equipped with a pusher to impart a pressing force to a die of the extrusion press, and which transmits the input rotational motion to the first motion conversion mechanism and converts the input rotational motion to linear motion and outputs the same to cause the pusher to move linearly with respect to the moveable frame.

The invention relates to extrusion and pipe presses (1), comprising a press frame consisting of a cylindrical spar (2) and a counter spar (4) connected thereto, in which a mobile billet container holder (7) supporting a billet container (8), which puts a billet (18) to be pressed, which was introduced by a loading device, into a press position in front of the counter spar (4) with the associated tool (38), and a mobile punch crosshead (6) are provided. In the cylindrical spar (2), a main cylinder, or press cylinder, is arranged, which in the cylinder housing (9) thereof receives a press piston (11), which at the front end thereof that is supported by the punch crosshead (6) is connected to a press punch (19). A compensation tank (15), which delivers hydraulic oil to the press piston (11) by way of a slider plate (28), is assigned to a main cylinder housing (9) connected to a tank line. With an extrusion press such as this, the considerable hydraulic expenditure, and in particular the non-productive time, are to be substantially reduced, while making the structural design more compact and simple at the same time. To accomplish this, the advancing and feed motions of the billet container holder (7) and punch crosshead (6) with press piston (11) are carried out by electromotive force, and both the precompression of the billet (18) loaded into the billet container (8) and the subsequent compression of the billet (18) are done by hydraulic loading of the press piston (11). Electric motors (12, 13) are assigned to the punch crosshead (6) and the billet container holder (7) as adjustment drives. A large-scale filling valve (20) is integrated in the cylinder housing (9) of the main cylinder for loading the press piston (11).

A screw extruder for the continuous extrusion of materials with high viscosity, in particular metals such as aluminum and its alloys. The extruder includes an Archimedes screw (1) rotationally provided within a liner (2) of a screw housing (4) having an inlet (11) for the feeding of the material to be extruded, a compacting or extrusion chamber (5) and an extrusion die assembly with a die (6) which forms the shape of the extruded product (7). The required compaction takes place at the down-stream end of the screw towards the extrusion chamber (5) corresponding to up to 540 of the rotation of the screw, or up to 1.5 turns of the screw flight length. The solid plug of metal formed at the end of the screw and extrusion chamber (5) is restricted from rigid rotation to obtain the required compaction and extrusion pressure.