Tire building drum including an expandable segmental cylinder as

Details Tire building drum including an expandable segmental cylinder as Tire building drum including an expandable segmental cylinder as

1988-05-13

1990-05-29

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Tire body building type

156416, 156420, B29D 3024

Patent

active

049292986

ABSTRACT:
A tire building drum (10) has a plurality of expandable axially extending, circumferentially spaced-apart segments (18) with an elastic cover sleeve (48). The radius (C) of the radially inner surface (50) of the cover sleeve (48) is greater than the radius (B) of the radially outer surface (20) of the segments (18) in the contracted condition of the drum (10) for placing the cover sleeve (48) over the segments (18) and is less than the radius (A) of the radially outer surface (20) of the segments (18) in the expanded condition of the drum (10) for gripping the segments (18) and maintaining a precise position of the cover sleeve (48). The segments have replaceable cover plates (38) of different thicknesses which are easily interchangeable to provide different drum components for different size tires. The ends of the drum (10) are sealed to provide a vacuum chamber (76) inside the drum (10) which is in communication with vacuum holes (78) in the cover sleeve (48) to hold the tire components on the drum surface (58) during assembly of the tire components.

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patent: 4510012 (1985-04-01), Kawaida et al.
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