Expandable tire building drum

Details Expandable tire building drum Expandable tire building drum

B - Operations, Transporting

29

D

154/18.7

B29D 30/24 (2006.01)

Patent

CA 1305030

ABSTRACT OF THE DISCLOSURE EXPANDABLE TIRE BUILDING DRUM A segmental drum (10) has a plurality of axially extending circumferentially spaced segments (36) with flexible connections (56) to shoulder pi tons (32) at opposite ends of each segment (36). Wedge shaped bars (62) are positioned between the segments (36) and connected to center pistons (64) for urging tapered side faces (80) of the bars (62) into engagement with sloping side faces (78) of the segments (36). Elastic turnup bladders (42) are positioned outward of the segments (36) with nose portions (40) overlapping the ends of the segments (363 for resiliently returning the segments (36) and bars (62) to a retracted condition after expansion by radially outward movement of the shoulder pistons (32) and center pistons (64).

598040

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