Pneumatic Tire Surface Fastener with Protective Rubber Layer
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Solution Overview
Problem
Pneumatic tire surface fasteners' engagement elements are often crushed during the curing process, leading to unstable attachment of auxiliary objects like noise-absorbing members.
Innovation Solution
A protective rubber layer is formed by filling uncured rubber between the engagement elements of the surface fastener, which is then placed on the tire inner surface, preventing crushing during curing and allowing for stable attachment of auxiliary objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a surface fastener is pasted on the tire inner surface before curing, then the auxiliary object can be attached easily, but the engagement element is crushed by bladder pressure during curing
Solution Approach 1:
The patent applies preliminary action by forming a protective rubber layer around the engagement elements before the curing process. This protective layer is created by applying uncured rubber to the surface fastener, which then cures together with the tire. The protective layer is already in place before bladder pressure is applied, preventing the engagement elements from being crushed during curing while maintaining their functionality for future attachment operations.
2Reliability
If a protective rubber layer is formed around engagement elements, then crushing is prevented, but the device complexity increases
Solution Approach 1:
The patent merges the protective layer formation process with the tire curing process. The uncured rubber applied to the surface fastener cures simultaneously with the tire rubber in the same curing cycle, eliminating the need for a separate protective layer application step. This integration maintains reliability by providing protection while avoiding the complexity of additional processing steps or separate protective components.
Solution Approach 2:
The uncured rubber applied to the surface fastener serves dual purposes: it acts as a protective layer around the engagement elements and simultaneously bonds the surface fastener to the tire inner surface. The rubber layer self-adheres to both the engagement elements and the tire, eliminating the need for separate adhesive applications or fastening mechanisms, thus reducing overall device complexity while maintaining protection.
Data Source
AI summary
A method of producing a pneumatic tire with a surface fastener including filling an uncured rubber between engagement elements of a surface fastener to form a protective rubber layer in which the engagement elements are buried; placing the surface fastener having the protective rubber layer on an uncured tire in a manner that a surface of the surface fastener opposite a surface having the engagement elements is in intimate contact with an inner surface of the tire; and curing the uncured tire having the surface fastener by use of a curing machine equipped with a bladder.