Invention Grant
- Patent Title: Extrusion press for rod or tube
- Patent Title (中): 挤出压力为ROD或TUBE
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Application No.: US3709013DApplication Date: 1970-05-19
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Publication No.: US3709013APublication Date: 1973-01-09
- Inventor: PETSCH E
- Applicant: SACK GMBH MASCHF
- Assignee: Sack Gmbh Maschf
- Current Assignee: Sack Gmbh Maschf
- Priority: DE1927396 1969-05-29
- Main IPC: B21C23/08
- IPC: B21C23/08 ; B21C23/21 ; B21C31/00 ; B21J7/26 ; B21C23/20
Abstract:
A hydraulic rod and tube extrusion press having a main extrusion ram and a piercer connected to a piston which works in a cylinder within the extrusion ram. In order to extrude tube around the piercer with the tip of the piercer stationary in the mouth of the die means are provided for supplying fluid to the return stroke chamber of the piercer piston cylinder so that the piercer is retracted at an appropriate rate relatively to the extrusion ram as the extrusion ram advances.
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