Patent ID: 7001553
Filing Date: 2006-02-21
Classification: B29C,B29D,B29K,Y10T

Abstract:
1. A method for forming and vulcanizing an air spring flexible member blank having a predetermined length, the method utilizing an apparatus including: a mold defining a longitudinal axis and a bellied inner wall defining a common hollow space having a bellied expanse for receiving the air spring flexible member blank therein; a pressure bellows unit including a pressure bellows extending axially in said common hollow space; and, said pressure bellows unit including first and second end pieces joined to said pressure bellows at corresponding longitudinal ends thereof; the method comprising the steps of: placing said blank over said pressure bellows with said blank having approximately the double length of a manufactured flexible member; introducing pressurized air into the interior of said pressure bellows to expand said pressure bellows thereby pressing said blank against said bellied inner wall and causing said pressure bellows to shorten along said longitudinal axis; and, causing said end pieces to move along said longitudinal axis to follow the shortening of said pressure bellows as said pressure bellows expands thereby holding a mechanical loading on said pressure bellows to a low value.