Mould for moulding a tire comprising a locking ring for locking the tread forming segments and method of curing a tire

• Main Authors: DRISCOLL, MICHAEL THOMAS, SIEVERDING, MARK ANTHONY, GIRARD, JEAN-CLAUDE
• Format: Patent
• Language: English; French; German
• Published: 23.02.2005
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A segmented mold (2) for molding a tire (100) is described which has a central axis; plurality of radially movable tread forming segments (4); two sidewall forming plates, a top sidewall forming plate (8), and a bottom sidewall forming plate (6); a top locking ring (10) having a plurality of circumferentially spaced means (30) for locking the segments (4), each means for locking (30) providing a predetermined angular path (75) for radially contracting the segments (4) upon closing the mold (2) in a locked position. The segmented (2) mold for molding a tire (100) further has a bottom locking ring (20) having a complementary plurality of circumferentially spaced means (30) for locking the segments (4), each means for locking (30) providing a predetermined angular path for radially contracting the segments (4) upon closing the mold.