Low-pressure chill-casting devices

Claim 1

A device for chill-moulding light alloy castings under low pressure conditions, comprising: a first section comprising a fluid-tight enclosure and a crucible disposed within said enclosure, said crucible adapted to be filled with molten metal, a second section comprising a mould comprising a plurality of mould sections assembled in a press and attached to one of an upper plate or lower plate of said press, said press having a movable plate secured to uprights along which said movable plate is adapted to slide through four straps disposed at the corners of said movable plate, said straps comprising on their inner faces groove means engaged by matching portions of rings formed with a pair of flat faces for permitting movement of said plate along the press uprights while providing the plate with a certain amount of lateral play, said two sections movable in relation to each other, a casting duct and a casting connecting tube providing fluid connection between said crucible in said first section and said mould in said section, said casting duct and said casting connecting tube adapted for easy removal and heating, and means for developing air pressure within said air pressure within said fluid-tight enclosure for forcing molten metal from said crucible into said mould through said casting duct.

Claim 2

A device for chill-moulding light alloy castings under low pressure conditions, comprising: a first section comprising a fluid-tight enclosure and a crucible disposed within said enclosure, said crucible adapted to be filled with molten metal, a second section comprising a mould comprising a plurality of mould sections assembled in a press and attached to one of an upper plate or lower plate of said press, said press having a movable plate secured to uprights along which said movable plate is adapted to slide through four straps disposed at the corners of said movable plate, said straps comprising on their inner faces groove means engaged by matching portions of rings formed with a pair of flat faces for permitting movement of said plate along the press uprights while providing the plate with a certain amount of lateral play, said two sections movable in relation to each other, a casting duct and a casting connecting tube providing fluid connection between said crucible in said first section and said mould in said section, said casting duct and said casting connecting tube adapted for easy removal and heating, and means for developing air pressure within said air pressure within said fluid-tight enclosure for forcing molten metal from said crucible into said mould through said casting duct.

Claim 4

A device for chill-moulding light alloy castings under low-pressure conditions, comprising: a first section comprising a fluid-tight enclosure and a crucible disposed within said enclosure, said crucible adapted to be filled with molten metal, a second section comprising a mould comprising a plurality of mould sections assembled to one of an upper plate or lower plate of a press, said two sections movable in relation to each other, a casting tube and a casting connecting tube providing fluid connection between said crucible and said mould, and means for developing air pressure within said fluid-tight enclosure for forcing molten metal from said crucible into said mould through said casting tube, thereby operating said mould, said casting tube comprising relatively thin-walled cast iron and opening into said mould which is a chill mould at a point near the mould cavity and widening at its end to form a longitudinal cavity having a volume decreasing toward the end opposite the metal feed opening, and molten metal supply ducts branched off said cavity for ensuring a proper and uniform distribution of molten metal to any shape of casting to be obtained.

Claim 5

A device for chill-moulding light alloy castings under low-pressure conditions, comprising: a first section comprising a fluid-tight enclosure and a crucible disposed within said enclosure, said crucible adapted to be filled with molten metal, a second section comprising a mould comprising a plurality of mould sections assembled to one of an upper plate or lower plate of a press, said two sections movable in relation to each other, a casting tube and a casting connecting tube providing fluid connection between said crucible and said mould, and means for developing air pressure within said fluid-tight enclosure for forcing molten metal from said crucible into said mould through said casting tube, thereby operating said mould, said casting tube comprising relatively thin-walled cast iron and opening into said mould which is a chill mould at a point near the mould cavity and widening at its end to form a longitudinal cavity having a volume decreasing toward the end opposite the metal feed opening, and molten metal supply ducts branched off said cavity for ensuring a proper and uniform distribution of molten metal to any shape of casting to be obtained.

Claim 8

A device for chill-moulding light alloy castings under low-pressure conditions, comprising: a first section comprising a fluid-tight enclosure and a crucible disposed within said enclosure, said crucible adapted to be filled with molten metal, a second section comprising a mould comprising a plurality of mould sections assembled to one of an upper plate or lower plate of a press, wherein said press comprises a movable plate secured to uprights along which it is adapted to slide through four straps disposed at the corners of the movable plate, said straps comprising on their inner faces groove means engaged by matching portions of rings formed with a pair of flat surfaces and permitting movement of said plate along said uprights and providing said movable plate with a certain amount of lateral play, said two sections movable in relation to each other, a casting tube and a casting connecting tube providing fluid connection between said crucible and said mould, and means for developing air pressure within said fluid-tight enclosure for forcing molten metal from said crucible into said mould through said casting tube, thereby operating said mould, said casting tube comprising relatively thin-walled cast iron and opening into said mould which is a chill mould at a point near the mould cavity and widening at its end to form a longitudinal cavity having a volume decreasing toward the end opposite the metal feed opening, and molten metal supply ducts branched off said cavity for ensuring a proper and uniform distribution of molten metal to any shape of casting to be obtained.

Claim 9

A device for chill-moulding light alloy castings under low-pressure conditions, comprising: a first section comprising a fluid-tight enclosure and a crucible disposed within said enclosure, said crucible adapted to be filled with molten metal, a second section comprising a mould comprising a plurality of mould sections assembled to one of an upper plate or lower plate of a press, wherein said press comprises a movable plate secured to uprights along which it is adapted to slide through four straps disposed at the corners of the movable plate, said straps comprising on their inner faces groove means engaged by matching portions of rings formed with a pair of flat surfaces and permitting movement of said plate along said uprights and providing said movable plate with a certain amount of lateral play, said two sections movable in relation to each other, a casting tube and a casting connecting tube providing fluid connection between said crucible and said mould, and means for developing air pressure within said fluid-tight enclosure for forcing molten metal from said crucible into said mould through said casting tube, thereby operating said mould, said casting tube comprising relatively thin-walled cast iron and opening into said mould which is a chill mould at a point near the mould cavity and widening at its end to form a longitudinal cavity having a volume decreasing toward the end opposite the metal feed opening, and molten metal supply ducts branched off said cavity for ensuring a proper and uniform distribution of molten metal to any shape of casting to be obtained.