Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Utilizing rotary motion of work
Patent
1983-02-01
1984-07-31
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Utilizing rotary motion of work
249179, 249185, 425110, 425403, 425471, 425DIG14, B29C 1304
Patent
active
044627874
ABSTRACT:
A rotatable mandrel for making cylindrical molded articles has a plurality of aligned identical and collapsible cylindrical mandrel sections supported upon a cantilevered shaft, the cylindrical sections having a truss supported relatively thin exterior wall and retractable segment to permit circumferential contraction of the wall, the composite segmental cylindrical segment being supported by a central cantilevered rotatable shaft in turn supported by a rotatable bearing assembly on a vertical support tower, the collapsible contraction of the composite cylindrical mandrel being controlled by internally mounted power units connected to the retractable segment and the other portions of the cylindrical mandrel sections.
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Bogardus, Jr. Carl R.
Thompson Lawrence C.
McBrayer Tinker R.
Woo Jay H.
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