| 摘要 |
Improved apparatus is disclosed for bonding tread material to tire carcasses utilizing a flexible heat conducting belt one end of which is secured to the tread and the remaining length thereof encircles the periphery of the tread and, by virtue of its heat conducting properties, assists in the bond of the tread to the tire carcass. The flexibility of the belt, as contrasted to a rigid matrix, for example, also permits the belt to conform to the tread configuration. One form of the invention disclosed also includes a second belt laminated to the first and having more strength so that the required pressure to assist in the curing operation can be accomplished without using a conventional pressure chamber. A further form of the invention discloses a laminated metallic type belt which again has one end secured to the tread and is wrapped about the periphery of the assembled tire. This form of the invention includes a metallic outer layer and a resilient heat conducting inner layer so that again both the required heat and pressure can be utilized. A still further form of the invention discloses shiftable plates carried by tire engaging plates which can be brought to bear against the edges of the tread at the line of juncture with the side wall. Heating units are also provided in this area, and the shiftable plates insure that the edges of the tread will be securely sealed and seated against the side wall of the tire during the curing operation.
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