APPARATUS FOR COMPRESSION MOULDING PREFORMS
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United States of America Patent
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Issued Date -
Feb 9, 2012
app pub date -
Feb 10, 2010
filing date -
Feb 13, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus for compression-moulding preforms from a dose of plastics comprises a punch arrangement, a die arrangement provided with a cavity and at least two die elements which are mutually movable between a contact position and a detached position. The punch arrangement comprising a punch suitable for being inserted into the cavity and a pressing sleeve mounted slidably around the punch to maintain the at least two die elements in the contact position. The punch arrangement further comprises a jacket arrangement arranged for receiving the punch and the pressing sleeve and at least a first chamber, containing a first fluid at a first pressure and acting on the pressing sleeve, which is entirely bounded by the pressing sleeve and by the jacket arrangement so as to enable the punch to be dismantled from the punch arrangement, maintaining the first chamber pressurised.
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