Tread Ring Mounting Apparatus for Retreaded Tire Manufacturing

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Solution Overview

Problem

Existing tire retreading methods face challenges in accurately mounting an annular tread ring on a tire base, particularly when using strip-shaped vulcanized tread rubber, which can result in discontinuous tread patterns and a deteriorated exterior appearance.

Innovation Solution

An apparatus comprising a tire base holding section and a tread ring mounting section with a tread holder and a pushing-out device, allowing for synchronized movement to accurately position and mount a vulcanized tread ring on the tire base, utilizing paddle plates and ball screw mechanisms for precise alignment and diameter adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a strip-shaped vulcanized tread rubber is used, then the manufacturing process is simpler, but the tread pattern becomes discontinuous and the exterior appearance is deteriorated

Engineering Contradiction:
Improveease of manufactureVSAvoidtread pattern continuity
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The tread ring is divided into multiple segments that can be separately manufactured and then assembled together to form a complete circular tread ring. This segmentation allows each segment to be precisely controlled during manufacturing while enabling the formation of a continuous circular pattern when assembled, resolving the contradiction between manufacturing simplicity and pattern continuity.

Inventive Principle:
Principle #1Segmentation

2Manufacturing precision

If an annular tread ring is mounted on the tire base, then the tread pattern continuity is improved, but a new complex mounting apparatus is required

Engineering Contradiction:
Improvetread pattern continuityVSAvoidmounting apparatus complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The mounting apparatus incorporates movable and adjustable components that can dynamically adapt to different tread ring sizes and positions. The system uses movable clamping mechanisms and adjustable positioning devices that can be reconfigured for various mounting requirements, reducing the need for multiple specialized apparatuses while maintaining high mounting precision.

Inventive Principle:
Principle #15Dynamics

3Manufacturing precision

If high-accuracy mounting of the tread ring is achieved, then the tread pattern continuity is improved, but the mounting process becomes more complex

Engineering Contradiction:
Improvetread ring mounting accuracyVSAvoidmounting operation simplicity
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The mounting process replaces complex manual alignment and positioning operations with automated mechanical guidance systems. The apparatus incorporates guide rails, precision bearings, and automated positioning mechanisms that automatically achieve high-accuracy mounting without requiring complex manual adjustment procedures, thereby maintaining operational simplicity while ensuring high precision.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS9987813B2Apparatus for mounting tread ring on tire base and method for manufacturing retreaded tire
Publication Date: 2018.06.05 SUMITOMO RUBBER INDUSTRIES LTD
  • US9987813B2 patent drawing
  • US9987813B2 patent drawing
  • US9987813B2 patent drawing

AI summary

An apparatus 1 for mounting an annular tread ring R on an outer peripheral surface TS of a tire base T, which includes a tire base holding section 2 which is movable between a first position P1 and a second position P2 while holding the tire base T, and a tread ring mounting section 3 for mounting the tread ring R on the outer peripheral surface TS of the tire base T. The tread ring mounting section 3 comprises a tread holder 10 for holding the inner circumferential surface of the tread ring R, and a tread pushing-out device 11 for pushing out the tread ring R in the axis direction. At the second position P2, after placing the tread ring R on the outer peripheral surface TS of the tire base T in the tire base holding section 2, the tread ring mounting section 3 pushes out the tread ring R from the tread holder 10 toward the first position P1 by the tread pushing-out device 11. And the tire base holding section 2 moves toward the first position P1 at the same speed as the pushing-out speed of the tread pushing-out device 11. Thereby, the tread ring R is mounted on the outer peripheral surface TS of the tire base T.