Process for producing pipe blooms

摘要

A process is provided for producing long tubular blooms, generally having a length to diameter ratio in excess of 20:1 in which molten material is rapidly poured into a chill mould whose axis is transverse to the horizontal, sealing the mould and immediately tilting the mould to a generally horizontal axial position while rotating about its axis, inserting a mandrel axially of the viscous center axis of the material and processing the material around the mandrel to form a tube after which the mandrel is removed.