METHOD FOR DIE CASTING OF THREE-LAYER ARTICLES AND APPARATUS FOR CARRYING OUT THE METHOD

A method of injection molding three-layer moldings, especially bottle blanks, with an inner and an outer layer of a "material A", PET (polyethylene terephthalate) for example, and a middle layer of a "material B", recycled PET for example. The method employs a device with at leas...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	BLANK, MICHAEL, SCHRAMM, KLAUS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS 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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A method of injection molding three-layer moldings, especially bottle blanks, with an inner and an outer layer of a "material A", PET (polyethylene terephthalate) for example, and a middle layer of a "material B", recycled PET for example. The method employs a device with at least one mold (1). The mold has several mold cavities and at last one hot-runner plate. There is a nozzle for each mold cavity. A nozzle-closing needle travels back and forth inside each nozzle. One of the materials, either material A or material B, is injected through a melt-injection channel in the nozzle-closing needle (3) and the other material, either material B or material A is injected through a melt-injection channel in the gap between the heart (2.1) and the jacket (2.2) of the nozzle (2).