Improvements in billet-loaders for the introduction of billets into a press

摘要

1,142,028. Billet piercing; extruding. SCHLOE. MANN A.G. 9 June, 1966 [23 June, 1965], No. 25730/66. Headings B3H and B3P. Hot billets 9 are conveyed from a furnace to the billet container 1 of a vertical press, such as an extrusion or piercing press, or to a forging press by a transportable hood 8 open at one end which surrounds the billet to reduce heat loss and oxidation. Steel billets 9SP1/SP heated in a furnace are moved along a conveyer 15 to a shoot 16 from which they are lifted by an hydraulic piston 12 into an insulating hood 8. This may have an insulated covering or be double-walled and may also include heating means. Billet 9 is retained in the hood by a pin 17 whilst it is transferred therein into the extrusion axis of a vertical tube-extrusion press by hydraulic, pneumatic or electrically actuated means 10. The pin 17 is then withdrawn and the billet falls into the vertical container 1 where it is pierced by a mandrel 19 and extruded through a die assembly 4. During extrusion a fresh billet is loaded into the hood.