Methods for manufacturing a tread for agricultural tire using a dinitrile oxide cure system

a technology of dinitrile oxide and manufacturing method, which is applied in the field of methods for the manufacture of agricultural tires, can solve the problems of affecting the cost of manufacturing an agricultural tire, the shelf life of cushion gum is relatively long, and the cost of making an agricultural tire is also affected

Inactive Publication Date: 2022-02-03
BRIDGESTONE AMERICAS TIRE OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This method reduces production costs and improves efficiency by allowing the use of ambient temperature curing, extending the shelf life of the cushion gum, and integrating the production process, resulting in a more economical and environmentally friendly agricultural tire retreading process.

Problems solved by technology

Although limited, the shelf life of the cushion gum is relatively long because the sulfur-based cure systems require relatively high heat to be activated.
Furthermore, the cost of manufacturing an agricultural tire is affected by having to produce the cushion gum at a facility distinct from the facility where the agricultural tires are made.
The cost of making an agricultural tire is also affected by having to apply both heat and pressure to cure the cushion gum to the lug and the cured rubber component.

Method used

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  • Methods for manufacturing a tread for agricultural tire using a dinitrile oxide cure system
  • Methods for manufacturing a tread for agricultural tire using a dinitrile oxide cure system

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Embodiment Construction

[0016]Embodiments of the present invention are based, at least in part, upon the discovery of a process of manufacturing an agricultural tire. In one or more embodiments, the process includes mating lugs to a substrate by using a cushion gum having a cure system that includes a stable dinitrile oxide compound. Because of the nature of the curing system, specifically the presence of the stable dinitrile oxide compound, the lugs can be advantageously mated to a cured rubber component (e.g., tread substrate) at ambient temperatures. Moreover, the process allows for the efficient mating of a plurality of lugs to a cured rubber component to form a useable agricultural tire.

[0017]In general, procedures for applying lugs to a tire tread substrate are known in the art as generally disclosed in U.S. Publ. No. 2014 / 0008005 and copending applications gaining priority from U.S. Ser. No. 61 / 846,591, which are incorporated herein by reference.

Application of Lugs

[0018]In one or more embodiments, t...

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Abstract

A method of manufacturing a tread for agricultural tires, the method comprising providing an agricultural tire casing, providing a cured rubber component having first and second planar surfaces, providing a plurality of cushion gums, wherein the plurality of cushion gums contains a cure system comprising a stable dinitrile oxide compound, providing a plurality of lugs, and forming an agricultural tread composite by mating the lugs to a planar surface of the cured rubber component using the cushion gum.

Description

FIELD OF THE INVENTION[0001]Embodiments of the invention relate to methods for the manufacture of treads for agricultural tires. According to one or more embodiments, the method includes applying lugs to a tire tread substrate by using a cushion gum that includes a stable dinitrile oxide compound.BACKGROUND OF THE INVENTION[0002]Agricultural tires are tires used to travel on soft soil, such as fields, and not hard roads. Further, agricultural tires have a lug pattern tread shape and are inflated at a lower pressure than passenger car tires in order to generate traction and move forward by penetrating soft soil.[0003]Traditionally, agricultural tires are created in a similar way to normal passenger car tires. Simply stated, the process of making a tire begins with a tire carcass, then a cured rubber component, also known as a tread component, is attached to the tire carcass by various known methods, and then the tire carcass and the tread component are cured, and a tire is formed.[00...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B29D30/56B60C11/02B60C11/00B60C1/00B29D30/54C08K5/00C08L7/00C08L9/00B29D30/06C08K5/32
CPCB29D30/56B60C2200/08B60C11/005B60C1/00B29D30/54C08K5/00B29D30/542C08L7/00C08L9/00B29D30/0681B60C1/0016C08K5/32B29D2030/544B29D2030/545B60C11/02C08L19/003C08L17/00B29D2030/541
InventorBARNED, ROBERTABELL, JOSHUABENDER, DAVID
OwnerBRIDGESTONE AMERICAS TIRE OPERATIONS LLC