US 2003/0111161 A1 · Method and apparatus for manufacturing pneumatic tires

Abstract

A method and an apparatus for manufacturing a pneumatic tire, in which carcass plies are formed by applying carcass cords over an outer surface of a toroidal core along cord paths extending in a meridian direction of the core are disclosed. A zigzag shaped carcass cord arrangement is formed by applying a carcass cord on an outer surface of an imaginary column axially of the imaginary column and sequentially engaging the carcass cord around hook pins arranged at opposite axial end portions of the outer surface of the imaginary column. The core is moved toward the carcass cord arrangement so that a center axis and an equatorial plane of the core are matched with a center axis and an axial center plane of the imaginary column, respectively. The hook pins arc moved radially toward the core so that an axial center portion of the carcass cord between the axially opposite hook pins are brought into contact with the outer surface of the core along its equatorial plane, and further moved radially from an outer peripheral side to an inner peripheral side of the core and also axially toward the core while maintaining tension of the carcass cords between the axial center portion situated at the equatorial plane of the core and the hooked portion engaged around the hook pins, so that the carcass cord is sequentially attached to the outer surface of the core from the outer peripheral side to the inner peripheral side of the core until the hooked portions of the carcass cord engaged around the hook pins are brought into contact with the outer surface of the core. Subsequently, the hooked portions of the carcass cord are pressed against the outer surface of the core for a given time so that the hooked portions of the carcass cord are attached to the core.

Claims7

Dependent claims

A method for manufacturing a pneumatic tire, wherein carcass plies are formed by applying carcass cords over an outer surface of a toroidal core along cord paths extending in a meridian direction of the core, said method comprising the steps of:

forming a zigzag shaped carcass cord arrangement by applying a carcass cord on an outer surface of an imaginary column axially of the imaginary column and sequentially engaging the carcass cord around hook pins arranged at opposite axial end portions of the outer surface of the imaginary column, said imaginary column having a substantially sector-shaped cross section and a length equal to that of a cord path on the core;
moving the core toward said carcass cord arrangement so that a center axis and an equatorial plane of the core are matched with a center axis and an axial center plane of said imaginary column, respectively;
moving the hook pins radially toward the core so that an axial center portion of the carcass cord between the axially opposite hook pins are brought into contact with the outer surface of the core along its equatorial plane;
further moving the hook pins radially from an outer peripheral side to an inner peripheral side of the core and also axially toward the core while maintaining tension of the carcass cords between the axial center portion situated at the equatorial plane of the core and the hooked portion engaged around the hook pins, so that the carcass cord is sequentially attached to the outer surface of the core from the outer peripheral side to the inner peripheral side of the core until the hooked portions of the carcass cord engaged around the hook pins are brought into contact with the outer surface of the core;
and
subsequently pressing the hooked portions of the carcass cord against the outer surface of the core for a given time so that the hooked portions of the carcass cord are attached to the core.

3 more elements

An apparatus for manufacturing a pneumatic tire, wherein carcass plies are formed by applying carcass cords over an outer surface of a toroidal core along cord paths extending in a meridian direction of the core, said apparatus comprising:

hook pins arranged on an outer surface of an imaginary column at opposite axial end portions thereof, said imaginary column having a substantially sector-shaped cross section and a length equal to that of a cord path on the core,
carcass cord applicator means for forming a zigzag shaped carcass cord arrangement by applying a carcass cord on the outer surface of the imaginary column axially of the imaginary column and sequentially engaging the carcass cord around the axially opposite hook pins;
first moving means for moving the core toward said carcass cord arrangement so that a center axis and an equatorial plane of the core are matched with a center axis and an axial center plane of said imaginary column, respectively;
second moving means for moving the hook pins radially toward the core so that an axial center portion of the carcass cord between the opposite hook pins are brought into contact with the outer surface of the core along its equatorial plane, and for further moving the hook pins radially from an outer peripheral side to an inner peripheral side of the core and also axially toward the core while maintaining tension of the carcass cords between the axial center portion situated at the equatorial plane of the core and the hooked portion engaged around the hook pins, so that the carcass cord is sequentially attached to the outer surface of the core from the outer peripheral side to the inner peripheral side of the core until the hooked portions of the carcass cord engaged around the hook pins are brought into contact with the outer surface of the core;
and
press means for pressing the hooked portions of the carcass cord against the outer surface of the core for a given time so that the hooked portions of the carcass cord are attached to the core.

3 more elements

Dependencies are inferred from the claim text.

Method and apparatus for manufacturing pneumatic tires

Life of this patent

Method and apparatus for manufacturing pneumatic tires

Life of this patent

Abstract

Claims7