Title: Protective coating for removable liner of press for hydrostatic extrusion

Abstract: A press for the hydrostatic extrusion of metallic billets to form tubes and other profiles includes a hollow high pressure cylinder having a removable liner which forms the inner wall thereof and which encloses the internal pressure chamber. To protect the removable liner from fatigue breakdown, the inner wall of the liner is coated with a protective coating of an organic polymer and a metallic tube is located adjacent the protective coating and concentric therewith, between the protective coating and the internal pressure chamber.

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Inventors: Gustafsson, Sven-Goran (Vesteras, SW)
Nilsson, Jan (Robertsfors, SW)
Syvakari, Pertti (Helsingborg, SW)

Application Number: 788665
Filing Date: 1977-04-18
Publication_date: 1978-04-04
Assignee: ASEA Aktiebolag (Vesteras, SW)
Primary Class(es): 72/60 72/272, 92/169.1
Other Classes:
US Patent Ref:

3364717	Jan, 1968	Green	72/272.
3751958	Aug, 1973	Nilsson et al.	72/60.
3914968	Oct, 1975	Korsell	72/60.
4016737	Apr, 1977	Gustafsson et al.	72/60.

Other Refs:
Primary Examiner: Gilden, Leon
Assistant Examiner:
Attorney: Watson, Cole, Grindle & Watson