Process for manufacturing bodies of polymeric material, comprising a core of foamed material enclosed by outer shell, and device used in said process

A PROCESS TO PRODUCE BODIES OF POLYMERIC MATERIAL COMPRISES EXTRUDING A TUBULAR ELEMENT (I.E., A "PARISON"), AND CAUSING SAID TUBULAR PARISON TO UNDERGO SWELLING UNTIL IT REACHES, AND CONFORMS TO, THE WALLS OF A MOULD, BY MEANS OF THE INJECTION, INSIDE THE INTERIOR OF SAID PARISON, OF A FO...

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Hauptverfasser: ADDEO, ANTONIO, VEZZOLI, ANNIBALE, BISCOTTI, AURELIO, MASCIA, FRANCESCO
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A PROCESS TO PRODUCE BODIES OF POLYMERIC MATERIAL COMPRISES EXTRUDING A TUBULAR ELEMENT (I.E., A "PARISON"), AND CAUSING SAID TUBULAR PARISON TO UNDERGO SWELLING UNTIL IT REACHES, AND CONFORMS TO, THE WALLS OF A MOULD, BY MEANS OF THE INJECTION, INSIDE THE INTERIOR OF SAID PARISON, OF A FOAMABLE POLYMERIC MATERIAL SUITABLE FOR CONSTITUTING THE FOAMED CORE OF SAID BODY.