US 12,145,340 B2Granted

Method of manufacturing pneumatic tire and forming device for pneumatic tire

AssigneeThe Yokohama Rubber Co., Ltd.

InventorYuta Takanashi

Life of this patent

Estimating the term…

Loading patent…

Abstract

In a method of manufacturing a pneumatic tire, a placement unit is moved relative to a forming drum in a drum circumferential direction to repeatedly perform a one-side step of delivering a reinforcing wire in a folded back state in a length from a central portion toward one side in the width direction of the forming drum and compression bonding the reinforcing wire to an innerliner of an outer surface of the forming drum, and after delivering the reinforcing wire in the length toward the one side in the width direction as described above, perform an other-side step of delivering the reinforcing wire in a folded back state in a length from the central portion toward an other side in the width direction of the forming drum and compression bonding the reinforcing wire to an outer surface of the innerliner.

Claims12

Dependent claims

A method of manufacturing a pneumatic tire, comprising the steps of:

forming a green tire by sequentially layering tire components comprising a reinforcing wire on an outer surface of a forming drum while continuously disposing the reinforcing wire extended in a drum width direction on an outer surface of a rubber member disposed on the outer surface of the forming drum in a drum circumferential direction;
and
vulcanizing the green tire;
the forming comprising:
a one-side step of extending the reinforcing wire toward a one-side in the drum width direction, folding the reinforcing wire on the one-side in the drum width direction to a folded back state in a predetermined length, delivering the reinforcing wire in the folded back state in the predetermined length from a central portion in a width direction of the forming drum toward the one-side in the width direction of the forming drum, and compression bonding the reinforcing wire to the outer surface of the rubber member;
an other-side step of extending the reinforcing wire toward an other-side in the drum width direction, folding the reinforcing wire on the other-side in the drum width direction to a folded back state in a predetermined length, delivering the reinforcing wire in the folded back state in the predetermined length from the central portion in the width direction of the forming drum toward the other-side in the width direction of the forming drum after delivering the reinforcing wire in the folded back state in the predetermined length that is folded to the predetermined length in advance toward the one-side in the width direction in the one-side step, and compression bonding the reinforcing wire to the outer surface of the rubber member;
and
the reinforcing wire extended in the drum width direction being continuously disposed in the drum circumferential direction by repeatedly performing the one-side step and the other-side step at positions shifted in the drum circumferential direction.

5 more elements

A forming device for a pneumatic tire, comprising:

a forming drum, an outer surface of the forming drum being sequentially layered with tire components comprising a reinforcing wire;
a wire storage tool configured to stock the reinforcing wire;
a placement unit configured to deliver the reinforcing wire from the wire storage tool and press the reinforcing wire against the outer surface of the forming drum;
and
a circumferential direction movement mechanism configured to relatively move the placement unit relative to the forming drum in a drum circumferential direction;
the placement unit comprising
a one-side movement mechanism configured to extend the reinforcing wire toward a one-side in the width direction of the forming drum, fold the reinforcing wire on the one-side to a folded back state in a predetermined length, and subsequently deliver the reinforcing wire in the folded back state in the predetermined length from a central portion in a width direction of the forming drum toward the one-side in the width direction of the forming drum,
a one-side compression bonding portion configured to press the delivered reinforcing wire against the outer surface of the forming drum,
an other-side movement mechanism configured to extend the reinforcing wire toward an other-side in the width direction of the forming drum, fold the reinforcing wire on the other-side to a folded back state in a predetermined length, and subsequently deliver the reinforcing wire in the folded back state in the predetermined length from the central portion in the width direction of the forming drum toward the other-side in the width direction of the forming drum after delivering the reinforcing wire in the folded back state in the predetermined length that is folded to the predetermined length in advance toward the one-side in the width direction, and
an other-side compression bonding portion configured to press the delivered reinforcing wire against the outer surface of the forming drum.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/266,583Filed 2 Jul 2019
Priority: JP 2018-1483097 Aug 2018
Published: US 2021/0291472 A123 Sep 2021
Granted: 19 Nov 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B29D 30/30
By the flat-tyre method, i.e. building on cylindrical drums: applying the layers; Guiding or stretching the layers during application
B29D 30/242
Drums: for manufacturing substantially cylindrical tyre components without cores or beads, e.g. treads or belts
B29D 30/10
Building tyres: on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
B29D 30/14
On round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre: rolling-down or pressing-down the…