Patent ID: 6106647
Filing Date: 2000-08-22
Classification: B29C,B29D,B29K,B29L,Y10T

Abstract:
A process for producing a sealant-incorporated tire tube which has an air chamber (3) filled with air and a sealant chamber (7) filled with a sealant (8), the process comprising:a first step of obtaining by extrusion molding a tube blank (2') having a peripheral wall (4) of a circular cross section, the tube blank (2') being divided inside the peripheral wall (4) into the air chamber (3) and the sealant chamber (7) by a partition wall (5);a second step of joining opposite ends of the tube blank (2') together to form the blank into an annular configuration;a third step of forming an air relief port (4.sub.1) in the peripheral wall (4) which port is communicated with the sealant chamber (7);a fourth step of placing the tube blank (2') in a heating die (18) and in that state subjecting the blank to vulcanization with supply of a gas of a high temperature and high pressure into the air chamber (3);a fifth step of filling the sealant chamber (7) with the sealant (7); anda sixth step of closing the air relief port (4.sub.1).