Split ply tires and bead area monocomponents

Patent metadata

Field	Value
Publication number	US-10124551-B2
Application number	US-201514678397-A
Country	US
Kind code	B2
Filing date	Apr 3, 2015
Priority date	Aug 10, 2011
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

An intermediate article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass is disclosed. The bead area subassembly has an annular bead core; a bead apex; a ply strip; and preferably a sidewall affixed to the ply strip. The subassembly is formed into a disk-shaped bead area monocomponent. The ply strip is wrapped about the bead core and the apex to form a ply turnup and both the ply strip and the ply turnup extend radially outwardly from the bead core. The bead area subassembly when formed into the disk-shaped bead area monocomponent is placed on an annular holder device.

First claim

What is claimed is:

1. A method of forming an article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass, the method comprising the steps of:
providing a first stage building drum having a single inflatable turnup bladder, one set of bead locks and one expandable set of drum center segments and a separate molded hub for delivering a bead core and removing and storing the finished subassembly;
applying a gum chafer strip cylindrically onto the inflatable turnup bladder adjacent the one expandable set of drum center segments;
applying a ply strip cylindrically over the gum chafer strip;
delivering the bead core held by separate molded hub and positioning the bead core overlaying the gum chafer strip and the ply strip over the single set of bead locks;
clamping the bead core and removing the molded hub;
expanding the set of expandable center segments turning radially upwardly a portion of the ply strip;
applying a bead apex against the bead core and the turned up portion of the ply strip;
inflating the turnup bladder moving a remaining portion of the ply strip about the bead core and bead apex and ply strip turnup to form the first stage bead area subassembly for a split ply tire carcass configured as a radially extending disk-shaped bead area monocomponent.

2. The method of forming an article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass of claim 1 further comprises:
applying a sidewall against the ply strip of the bead area monocomponent to complete the first stage bead area subassembly.

3. The method forming an article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass of claim 1 wherein the apex is applied from a gear pump and extruded onto the bead core and turnup.

4. The method forming an article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass of claim 2 wherein the sidewall is applied from a gear pump and extruded onto the ply strip.

5. The method forming an article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass of claim 2 further comprises the steps of:
moving the molded hub over the first stage building drum to attach the first stage bead area subassembly configured as the radially extending disk-shaped bead area monocomponent;
removing the molded hub with the attached first stage bead area subassembly configured as the radially extending disk-shaped bead area monocomponent from the first stage building drum.

6. The method forming an article of manufacture formed as a first stage bead area subassembly for a split ply pneumatic tire carcass of claim 5 further comprises the step of:
stacking the molded hub with the attached first stage bead area subassembly configured as the radially extending disk-shaped bead area monocomponent onto a stack for storage and latter assembly.

Assignees

• Goodyear Tire & Rubber

Inventors

• Weaver Douglas Raymond
• Kitz Steven Leonard

Classifications

• B60C9/0292

  Carcass ply curvature (sidewall curvature B60C13/003) · CPC title

• B29D30/72

  Side-walls · CPC title

• B60C15/0072

  with ply reverse folding, i.e. carcass layer folded around the bead core from the outside to the inside · CPC title

• B60C9/0207

  Carcasses comprising an interrupted ply, i.e. where the carcass ply does not continuously extend from bead to bead but is interrupted, e.g. at the belt area, into two or more portions of the same ply · CPC title

• B29D2030/2614

  Bladders associated with the building drum, e.g. bladders used for the toroidal expansion, bladders for turning-up the plies · CPC title