Back to results
US 5,678,442 AGranted
Extruder
AssigneeUbe Industries, Ltd.
InventorsHiroyoshi Ohba, Hideki Iwai
Life of this patent
Estimating the term…
Abstract
An extruder has a cylindrical container into which a billet is loaded; a two-piece seal block disposed on an end surface of the container at an extruding stem side; a vacuum deaerating hole formed in the seal block; and a fixed dummy block, having an internal cooling function, fixed to an end of the extruding stem, wherein the seal block is allowed to be opened and closed in a direction perpendicular to the axial direction of the container and the seal block comes in close contact with an outer surface of the extruding stem and the end surface of the container when the seal block is closed.
Claims19
An extruder for a billet comprising:
- a cylindrical container adapted to receive the billet therein and having an end surface;
- an extruding stem to be entered into the cylindrical container through the end surface of the cylindrical container;
- guide rods situated near the end surface of the cylindrical container and extending perpendicular to an axial direction of the container;
- a two-piece seal block disposed on the end surface of said container and formed of two block pieces, each block piece having at one side a contact surface with a seal member made of a heat resistant and resilient material and at a side away from the contact surface through rings, said guide rods passing through the through rings of the block pieces to guide the block pieces for opening and closing the block pieces so that when the block pieces are closed perpendicular to the axial direction of the container along the guide rods, the seal members of the block pieces contact the extruding stem and the container;
- vacuum deaerating holes formed in the block pieces of the seal block for removing air therethrough;
- and
- a fixed dummy block attached to an end of the extruding stem and having an internal cooling function at a front portion thereof for cooling the dummy block and a rear portion of the billet.
4 more elements
An extruder for a billet comprising:
- a container having a container liner adapted to receive the billet therein and having an end surface;
- a ring-shape protrusion disposed on the end surface of the container,
- an extruding stem to be entered into the container liner through the end surface of the container;
- guide rods situated near the end surface of the container and extending perpendicular to an axial direction of the extruding stem;
- and
- a two-piece seal block disposed on the end surface of said container and formed of two block pieces, each block piece having at an inner side a step shape portion, at a side away from the inner side through rings and a seal member attached to the step shape portion, said guide rods passing through the through rings of the block pieces to guide the block pieces for opening and closing the block pieces so that when the block pieces are closed perpendicular to the axial direction of the extruding stem along the guide rods, the seal members attached to the step shape portions of the block pieces contact outer surfaces of the extruding stem and the ring-shape protrusion to seal a deaeration space in the container liner.
3 more elements
An extruder for a billet comprising:
- a container having a container liner adapted to receive the billet therein and having an end surface;
- a ring-shape protrusion disposed on the end surface of the container,
- an extruding stem to be entered into the container liner through the end surface of the container;
- a ring-shape seal block formed of a pair of seal block pieces disposed near the container at a side of the extruding stem, said seal block pieces being opened and closed by swinging motion in a direction perpendicular to an axial direction of the extruding stem and having step shape portions with sealing members to abut against outer surfaces of the ring-shape protrusion and the extruding stem at the same time when the seal block pieces are closed, said seal block pieces contacting the outer surfaces of the ring-shape protrusion and the extruding stem at the same time through the sealing members to seal a deaerating space in the container liner;
- and
- a hydraulic cylinder attached to the seal block for opening and closing the seal block pieces, said hydraulic cylinder having a rod such that when said rod is moved linearly, the seal block pieces rotate and move between a closed position and a retracted rear position.
3 more elements
Dependencies are inferred from the claim text.