Tire building drum

• Main Authors: VARGO RICHARD DAVID, YAO MINWU, HOGAN MICHAEL JAMES, MONTGOMERY MARK JOHN, ANDERSON JOHN EDWARD, ONDO ANDREW ROBERT, KMIECIK FRANK ANTHONY, STOILA GEORGE MICHAEL, JOHNSON KRISTIAN DANIEL, MORALES PABLO RAFAEL
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2019
• Subjects: 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

The invention relates to a tire building drum. A second stage tire building drum is disclosed. The tire building drum has two hubs with an inner sleeve mounted to a central shaft of the tire buildingdrum and configured for axial movement. At least one of the hubs is configured for free axial movement. Preferably, each hub further include a sliding sleeve mounted on the inner sleeve for unconstrained sliding in the axial direction relative to the inner sleeve. Preferably, each hub has a bead receiving mechanism mounted on the sliding sleeve and comprised of one or more segments that are radially expandable. Preferably, each segment has a pocket with a curved surface for receiving a bead. The method employs the steps of mounting a green cylindrically shaped tire carcass onto a tire buildingdrum so that each bead are seated in a respective bead pocket segment, inflating the carcass under low pressure and expanding the carcass into engagement with tread and belt assembly while allowing the one or more of the hubs