METHOD OF MANUFACTURING PNEUMATIC TIRE, SHAPING DEVICE AND PNEUMATIC TIRE

摘要

A method of manufacturing a pneumatic tire includes forming a green case by cylindrically winding a tire component member which includes at least one layer of a carcass ply. A green tire is shaped by expanding the green case into a toroidal shape with the supply of a fluid into the green case so that the green case adheres to a tread ring arranged radially outside the green case. The green tire is subjected to vulcanization molding within a mold die. During the shaping of the green tire, the fluid is supplied in accordance with a pressure profile which changes in a stepwise manner. The pressure profile is set such that a former stage pressure which is a pressure in a stage preceding a final stage is set lower than a final stage pressure which is a pressure in the final stage.

主权项

1. A method of manufacturing a pneumatic tire including:
forming a green case by cylindrically winding a tire component member which includes at least one layer of a carcass ply; shaping a green tire by expanding the green case into a toroidal shape with the supply of a fluid into the green case so that the green case adheres to a tread ring arranged radially outside the green case; and subjecting the green tire to vulcanization molding within a mold die, wherein during the shaping of the green tire, the fluid is supplied in accordance with a pressure profile which changes in a stepwise manner, and the pressure profile is set such that a former stage pressure which is a pressure in a stage preceding a final stage is set lower than a final stage pressure which is a pressure in the final stage.