SPRITZGIESSVERFAHREN SOWIE DANACH HERGESTELLTES SPRITZGUSSTEIL

The invention relates to a process for producing an injection moulding having at least two parts of different synthetic material. This may, in particular, be a cock (2) with an outer housing (4) and a plug (5) rotatable therein. In this production process, an outer section (4) is initially moulded i...

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Bibliographische Detailangaben
1. Verfasser:	PFAFF, ADOLF
Format:	Patent
Sprache:	ger
Schlagworte:	ACTUATING-FLOATS AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a process for producing an injection moulding having at least two parts of different synthetic material. This may, in particular, be a cock (2) with an outer housing (4) and a plug (5) rotatable therein. In this production process, an outer section (4) is initially moulded in a first injection moulding process and then, in a second injection moulding process, the inner component (5) is moulded by injection of a synthetic material with a greater moulding shrinkage than that of the outer component into an inner chamber (17) of the outer component. In order to seal the components against each other despite this different moulding shrinkage, sealing regions with oblique surfaces (12) are formed between the two components by the shrinkage of the material of the inner component. A filler (16) with a comparatively low moulding shrinkage may be inserted into the inner component with a high moulding shrinkage so that only minor dimensional changes take place in the inner component during cooling.