Method and device for folding back an unvulcanised blank

The method involves attaching blanks (4) on an inner tool (1), which is formed as a partial hollow inner sleeve (5) and as a bolt (2) provided with a control element. An outer tool i.e. hollow cylinder (8), is processed during folding of the blanks relatively and coaxially to the inner tool in direc...

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Bibliographische Detailangaben
1. Verfasser:	Warthemann, Jens
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The method involves attaching blanks (4) on an inner tool (1), which is formed as a partial hollow inner sleeve (5) and as a bolt (2) provided with a control element. An outer tool i.e. hollow cylinder (8), is processed during folding of the blanks relatively and coaxially to the inner tool in direction of non expanded ends of the blanks until the entire expanded area of the blanks is gradually folded. Folding of the blanks is produced by a discontinuity in an outer contour of the inner tool, and blanks are retained on the inner tool during the folding. An independent claim is also included for a device for folding unvulcanized blank of air spring-rolling bellow.