VERFAHREN ZUM FORMEN VON MOLEKULAR ORIENTIERTEN VORFORMLINGEN

The present invention discloses a method an apparatus to form molecularly oriented plastic receptacles. A hollow preform, generally cylindrical, with a closed end and an open end, is molded by injection, starting from a partially crystalline molecularly oriented plastic material. The preform is subs...

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Bibliographische Detailangaben
Hauptverfasser:	STEELE, SCOTT W, GITTNER, FRANZ, ROOS, UWE-VOLKER
Format:	Patent
Sprache:	ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The present invention discloses a method an apparatus to form molecularly oriented plastic receptacles. A hollow preform, generally cylindrical, with a closed end and an open end, is molded by injection, starting from a partially crystalline molecularly oriented plastic material. The preform is subsequently passed along a series of heating and cooling zones and is reheated at a temperature at which the inter-crystalline structures in the preform melt, without melting the crystal cores of the same. This preform is quickly stretch blow molded and quickly cooled against a polished mold surface, in order to produce a molecularly oriented receptacle having clarity, impact-resistance, and barrier properties to gas and water vapor, as well as improved rigidity.