Extrusion press stem with at least one channel running approximately axially through it

Claim 1

An extrusion press stem having an axis, said stem having a die mounted thereon at one end thereof for use in the indirect extrusion of a light metal billet, and adapted to fit tightly into a passage of a container, comprising, in combination: a plurality of stem components being disposed in adjoining series arrangement along said axis, the end portion of each of said stem components near said die has an increased inside diameter and the other end has a reduced outside diameter whereby said other end of said stem components is telescopically received in said end portion of said adjoining component such as said stem components are interconnected tightly but releasably by their adjacent concentric peripheral end portions whereby the overlapping peripheral end portions of said stem components prohibit said stem components from separating when withdrawing said extrusion press stem from said container; said stem defining at least one channel extending the entire length thereof substantially parallel to said axis, and means for cleaning the container passage during operation of said extrusion press by scraping surplus metal off the container, the cleaning means including a portion projecting outwardly and substantially radially from the end of the stem component nearest the die.