APPARATUS FOR TWO-LAYERED INJECTION MOULDING

An injection mould for producing a magnetic tape cassette housing partly of a two-layered construction is described. The apparatus comprises a fixed core (1a), which is provided at the edge with a projection (5), which has the effect of a sealing strip with respect to the movable core (2a). After th...

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Bibliographische Detailangaben
Hauptverfasser:	LUTZ, GOTTFRIED, GUMPLINGER, FRANZ, BREUER, RUDOLF, RIEDEL, GERD, D.I
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PERFORMING OPERATIONS PHYSICS 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:	An injection mould for producing a magnetic tape cassette housing partly of a two-layered construction is described. The apparatus comprises a fixed core (1a), which is provided at the edge with a projection (5), which has the effect of a sealing strip with respect to the movable core (2a). After the injection operation into the first mould cavity (4), the movable core (2a) is moved axially downwards by about half the wall thickness, whereupon the second mould cavity (3, 3') is filled by means of a second needle valve nozzle. ……