Methods and apparatus for curing retreaded tires

A technology for retreading tires and tires, applied in the direction of transportation and packaging, tire parts, tire tread/tread pattern, etc., can solve the problems of complex compression, unevenness under the tread, becoming fluid, etc.

Inactive Publication Date: 2014-06-25
MICHELIN RECH & TECH SA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This also reduces the void volume and changes the void pattern, which can also create inhomogeneities under the tread
This compression problem is compounded when the bonding material becomes more ductile or becomes fluid as the assembly is heated during the curing process
Another issue that complicates the situation is when a portion of the tread is uncured, as the uncured tread may also become more malleable or fluid when the components are heated during the curing process

Method used

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  • Methods and apparatus for curing retreaded tires
  • Methods and apparatus for curing retreaded tires
  • Methods and apparatus for curing retreaded tires

Examples

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Embodiment Construction

[0022] Certain embodiments of the present invention provide for maintaining the shape and volume of cavities positioned along the outer surface of the tread, constraining the tread in a desired arrangement relative to the tire carcass (i.e., outer tire), and / or when forming a retreaded tire. Methods and apparatus for constraining a curing membrane in a desired arrangement relative to a tire tread. By employing such methods and apparatus, the shape, volume, and arrangement of cavities located along the outer surface of the tread are better preserved. For this reason, the width of the tread is better maintained when the shape and / or volume of the void is generally preserved and stabilized. In particular embodiments, such methods and apparatus maintain tread grooves in an open arrangement and / or in a desired open shape. In addition, such methods and apparatus assist in maintaining the bottom of any such recess in a desired arrangement, such as substantially preventing any substa...

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PUM

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Abstract

Embodiments of the invention include methods and apparatus for constraining a tread in a desired arrangement about a tire carcass during retreading operations. Such methods include the steps of providing an annular tire carcass configured for receiving a tread. Such methods also include the step of arranging a tread annularly about the precured tire carcass in a desired position to form an assembled retreaded tire. Such methods further include the step of arranging a retread curing membrane about an outer side of the tread, the curing membrane including an interior surface arranged to engage the outer side of the tread and including one or more protrusions extending from the membrane interior surface and into a void of the outer side of the tread. In other embodiments, a separate insert containing protrusions is arranged between a curing membrane and a tire tread for retread curing operations.

Description

technical field [0001] The present invention relates generally to methods and apparatus for curing retreaded tires, and more particularly to methods and apparatus for maintaining the tread in a desired arrangement relative to the tire carcass during tire retreading operations. Background technique [0002] Retreaded tires are typically manufactured by attaching a new tread on top of an existing tire carcass. A curing process is performed to secure the tread to the carcass. During preparation for the curing process, a curing membrane or envelope is placed around the tread to hold the tread in a desired position on top of the tire carcass and to create a seal between the retreaded tire component and the curing membrane. A bonding layer may be inserted between the tread and the tire carcass to facilitate bonding. The area between the curing membrane and the tread is then placed under vacuum pressure to substantially remove the air between the curing membrane and the tire comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/54
CPCB60C11/02B29D30/542
Inventor E·B·科尔比D·G·齐拉斯C·E·扎拉克
Owner MICHELIN RECH & TECH SA
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