Method and apparatus for the manufacture of rotary sheet dies
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United States of America Patent
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-
Aug 29, 1989
Grant Date -
N/A
app pub date -
Jun 17, 1988
filing date -
Jun 17, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary sheet die suitable for use in the cutting of paper webs and the like is manufactured by securing the sheet to a hollow mandrel using mechanical clamps and internal vaccum. The mandrel and sheet assembly is then placed in an EDM apparatus in which vertical movement of the electrode is gear synchronized with the rotary movement of the mandrel and sheet combination. Chilled dielectric fluid is used to flush and cool the electrode and sheet die interface.
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