METHOD FOR STRIPPING OPEN ENDED BELLOWS PART FROM INJECTION MOLD

A method for stripping a resilient bellows part from an injection mold has a step of injection molding a resilient bellows part around a colinear core pin and a stripper rod, surrounded by a split cavity. The bellows part has two open ends, one of which is substantially rigid and is closed by the st...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	PETERSON, ROBERT, JAMES
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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
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Beschreibung
Zusammenfassung:	A method for stripping a resilient bellows part from an injection mold has a step of injection molding a resilient bellows part around a colinear core pin and a stripper rod, surrounded by a split cavity. The bellows part has two open ends, one of which is substantially rigid and is closed by the stripper rod passing through it. The second open end is resilient. Another step opens the split cavity to permit the bellows part to be stripped from the core pin. Yet another step expands the bellows part radially outward from the core pin. Simultaneously with expanding the bellows part, a step of pushing the substantially rigid open end of the bellows part by the stripper rod causes the resilient portion and resilient open end to be stripped off the core pin. Finally, the substantially rigid open end of the bellows part is ejected from the stripper rod.