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Emil Bier
Adolf Hoffmann
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Publication of GB190524031ApublicationCriticalpatent/GB190524031A/en
24,031. Bier, E., and Hoffmann, A. Nov. 21. Casting and moulding.-A flawless hollow ingot to be made into a solid-drawn tube is cast around a conical mandrel e within a conical mould c which is cylindrical for a distance d. The mandrel rests on a disk of metal supported by the annular rim of a plunger l, sliding in a carriage k and operated by a ram a to compress the metal. The motion of the mandrel is retarded by the ram b. the motions of the two rams a, b being so controlled as to be always proportional to the ordinates of two curves A, B, the common abscissa t of which represents the time during which the ingot has been cooling. The disk of metal is sheared during the compressing process. When the pressure on the ram a is removed, the ram b pushes out the mandrel e, and then the plate m between the ram and mandrel pushes out the ingot.
GB190524031D1905-11-211905-11-21Process for Producing Solid Drawn Tubes.
ExpiredGB190524031A
(en)