A shearing device for an extrusion press is adapted for cutting off from each other an extruded product and a discard which is the residue of a billet, the shearing device being configured so that the configuration thereof is simplified to reduce costs required for maintenance and production and so that the gap between the shear blade and an end surface of a die is automatically adjusted to improve the shearing accuracy, thereby providing a satisfactory cut surface. A shear cylinder (21) is mounted in a downward facing position to a frame (16) provided on the side of an end platen (11) which faces a container (10). A shear guide (18) is mounted to the frame (16) in a tiltable manner, the shear guide (18) having a shear blade (24) which is provided at the lower end thereof and guiding a shear slide (23). A tilt cylinder (19) for the shear guide (18) is mounted to the frame (16), the tilt cylinder (19) being capable of keeping the gap between the front face of a die stack (12) and the shear blade (24) constant by pressing the shear guide (18) against a horseshoe (26). The piston rod (22) of the shear cylinder (21) is mounted to the shear slide (23) so as to be capable of tilting and sliding.

A shearing device for an extrusion press is adapted for cutting off from each other an extruded product and a discard which is the residue of a billet, the shearing device being configured so that the configuration thereof is simplified to reduce costs required for maintenance and production and so that the gap between the shear blade and an end surface of a die is automatically adjusted to improve the shearing accuracy, thereby providing a satisfactory cut surface. A shear cylinder (21) is mounted in a downward facing position to a frame (16) provided on the side of an end platen (11) which faces a container (10). A shear guide (18) is mounted to the frame (16) in a tiltable manner, the shear guide (18) having a shear blade (24) which is provided at the lower end thereof and guiding a shear slide (23). A tilt cylinder (19) for the shear guide (18) is mounted to the frame (16), the tilt cylinder (19) being capable of keeping the gap between the front face of a die stack (12) and the shear blade (24) constant by pressing the shear guide (18) against a horseshoe (26). The piston rod (22) of the shear cylinder (21) is mounted to the shear slide (23) so as to be capable of tilting and sliding.

A shear device (21) of an extrusion press having a booster mechanism using an air cylinder or electric motor to supplement thrust to an amount corresponding to hydraulic pressure is provided. A fastening part pressing against a die stack (4) is configured by a booster mechanism using a lever and a shear guide (24) is pressed against a horseshoe (13) to fasten it in the extrusion direction. Further, a clearance between a surface of the die stack and a shear knife can be held constant. Also, a booster mechanism using a lever is employed for a tilt mechanism for the shear guide in the extrusion press.

A shear device (21) of an extrusion press having a booster mechanism using an air cylinder or electric motor to supplement thrust to an amount corresponding to hydraulic pressure is provided. A fastening part pressing against a die stack (4) is configured by a booster mechanism using a lever and a shear guide (24) is pressed against a horseshoe (13) to fasten it in the extrusion direction. Further, a clearance between a surface of the die stack and a shear knife can be held constant. Also, a booster mechanism using a lever is employed for a tilt mechanism for the shear guide in the extrusion press.

An extrusion apparatus includes an extruder, a run-out table that supports an extruded material that has been extruded from the extruder, a feed roller and a pulling roller that are provided at a given interval so as to be able to come in rolling contact with the extruded material that is situated on the run-out table, and a cooling section that cools the extruded material between the feed roller and the pulling roller, wherein the feed roller and the pulling roller apply a tensile force to the extruded material while the extruded material advances from the feed roller to the pulling roller.

An extrusion apparatus includes an extruder, a run-out table that supports an extruded material that has been extruded from the extruder, a feed roller and a pulling roller that are provided at a given interval so as to be able to come in rolling contact with the extruded material that is situated on the run-out table, and a cooling section that cools the extruded material between the feed roller and the pulling roller, wherein the feed roller and the pulling roller apply a tensile force to the extruded material while the extruded material advances from the feed roller to the pulling roller.

A method of cleaning an extrusion die from residual metal remaining after an extrusion process at a temperature below 600° C. and of recovering the residual metal includes providing a thrust member with at least one portion made of a polymeric material at the extrusion die; reciprocally moving the thrust member and the die; removing polymeric material not flowed out of the die during the preceding step; mechanically and/or chemically removing the residual metal not flowed out from the die during the moving step; and opening the extrusion die. The polymeric material in the moving step has a water content lower than 7% by weight with respect to the total weight of the polymeric material. During the moving step, the polymeric material is at least partially in a plastic deformation condition or melted so as to occupy the volume of the residual metal flowed out of the extrusion die.

A method of cleaning an extrusion die from residual metal remaining after an extrusion process at a temperature below 600° C. and of recovering the residual metal includes providing a thrust member with at least one portion made of a polymeric material at the extrusion die; reciprocally moving the thrust member and the die; removing polymeric material not flowed out of the die during the preceding step; mechanically and/or chemically removing the residual metal not flowed out from the die during the moving step; and opening the extrusion die. The polymeric material in the moving step has a water content lower than 7% by weight with respect to the total weight of the polymeric material. During the moving step, the polymeric material is at least partially in a plastic deformation condition or melted so as to occupy the volume of the residual metal flowed out of the extrusion die.

An extrusion press shearing device includes: a converter that converts rotational motion of a ball screw into linear motion of a shearing slide drive frame; a shearing slide attached to the leading end of the shearing slide drive frame; and hydraulic cylinders attached to the shearing slide drive frame, wherein the ball screw of the converter and the hydraulic cylinders are arranged in parallel, and the ball screw is rotated to move the shearing slide vertically so that a discard is cut off by the hydraulic cylinders.

An extrusion press shearing device includes: a converter that converts rotational motion of a ball screw into linear motion of a shearing slide drive frame; a shearing slide attached to the leading end of the shearing slide drive frame; and hydraulic cylinders attached to the shearing slide drive frame, wherein the ball screw of the converter and the hydraulic cylinders are arranged in parallel, and the ball screw is rotated to move the shearing slide vertically so that a discard is cut off by the hydraulic cylinders.