Rocker-Arm Curing Mold for Non-Pneumatic Tire Vulcanization
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Solution Overview
Problem
Conventional tire manufacturing processes are inadequate for producing non-pneumatic tires, as they do not effectively accommodate the unique structural arrangements required by these tires, limiting their applicability and efficiency.
Innovation Solution
A mold assembly and method for manufacturing non-pneumatic tires, utilizing a curing shoe assembly with rocker arms and curing shoes to apply pressure and heat to less-than-fully-cured elastomeric materials, transitioning them into a fully-cured state, while accommodating the specific structural components of non-pneumatic tires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional tire manufacturing processes are used, then pneumatic tires can be produced effectively, but non-pneumatic tires cannot be manufactured due to incompatible structural requirements
Solution Approach 1:
The mold assembly is divided into multiple die segments that can be independently positioned and configured. These segments include different surface portions (tread pattern section, bead section, sidewall section) that can be arranged to match the unique structural requirements of non-pneumatic tires, allowing the same mold assembly to adapt to various tire types through reconfiguration of segments
Solution Approach 2:
The mold assembly is designed with multi-functional capabilities to accommodate both pneumatic and non-pneumatic tire manufacturing. By incorporating adjustable die segments and configurable curing chamber arrangements, the mold assembly can adapt its structure and function to produce different tire types, eliminating the need for completely separate manufacturing processes
2Adaptability or versatility
If conventional curing mold assemblies are used, then standard tire curing can be achieved, but the unique structural arrangements of non-pneumatic tires cannot be accommodated
Solution Approach 1:
The mold assembly incorporates movable and adjustable components, including die segments that can be repositioned and curing chamber configurations that can be modified. This dynamic capability allows the mold assembly to adapt its structure to match the unique structural arrangements of non-pneumatic tires while maintaining precise dimensional control and structural accuracy during the curing process
3Productivity
If conventional tire curing processes are used, then pneumatic tires can be cured effectively, but non-pneumatic tires require specialized curing arrangements that conventional processes cannot provide
Solution Approach 1:
The mold assembly is pre-configured with multiple die segments and curing chamber arrangements that are prepared in advance to accommodate non-pneumatic tire structural requirements. This preliminary configuration allows the curing process to proceed efficiently without requiring extensive retooling or process modification, maintaining high productivity while enabling specialized tire manufacturing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method and mold assembly enable the efficient curing of non-pneumatic tires, ensuring all or substantially all portions are cross-linked and vulcanized, resulting in a durable and functional tire assembly.
Implementation Method 1
the curing bladder is inflated such that the curing bladder extends into the tire chamber of the uncured tire assembly in abutting engagement with the inner liner
Implementation Method 2
the tire curing press introduces heat to the uncured tire assembly which vulcanizes or otherwise crosslinks the uncured tire material to form a completed tire
Data Source
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AI summary
Mold assemblies used for curing non-pneumatic tires include a mold base having a mold axis. An assembly rod has a rod axis is supported on the mold base in radially-offset alignment with the mold axis. A first rocker arm is supported on the assembly rod with a first curing shoe supported on the first rocker arm. A second rocker arm is supported on the assembly rod and a second curing shoe is supported on the second rocker arm. Methods of manufacturing a non-pneumatic tire are also included.