Nitrogen die cylinder

Details Nitrogen die cylinder Nitrogen die cylinder

B - Operations, Transporting

21

D

113/69

B21D 22/20 (2006.01) B21D 24/02 (2006.01) F16F 9/02 (2006.01) F16F 9/36 (2006.01)

Patent

CA 1236344

Abstract of the Disclosure A piston-cylinder unit for use in a die is threaded into a port of a nitrogen manifold. The piston has a seal thereon slideably engaging the cylinder bore and has a rod projecting out one end of the cylinder, the rod being biased by the gas pressure at the threaded end of the cylinder into engagement with a die member reciprocated in response to reciprocation of the ram of the press in which the die is mounted. The portion of the cylin- der threaded into the manifold has a bleed passageway therethrough which communicates with the interior of the cylinder below the seal on the rod when the press ram is at bottom dead center posi- tion and with the interior of the cylinder above the seal on the piston when the piston rod is fully retracted.

483040

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