Radially Movable Sector Forming Drum for Tire Building
Solution Overview
Problem
The existing process for manufacturing vehicle tires requires multiple forming drums of different sizes and shapes, leading to inefficient storage and management, as each tire size necessitates a specific drum, resulting in increased storage needs and production costs.
Innovation Solution
A forming drum with radially movable sectors that can be adjusted to change the deposition surface's diameter and curvature outline, allowing the same drum to be used for various tire sizes, reducing the need for multiple drums and optimizing storage and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple forming drums of different sizes and shapes are used for different tire sizes, then each tire size can be produced with geometric features coincident with the finished product, but storage needs and production costs increase
Solution Approach 1:
The forming drum incorporates radially movable sectors that can be adjusted between different radial positions to change the deposition surface's curvature outline. This dynamic adjustment allows a single drum to adapt its geometry to match different tire sizes and shapes, eliminating the need for multiple fixed drums and optimizing both manufacturing precision and storage efficiency
Solution Approach 2:
The invention changes the geometric parameters of the deposition surface by moving sectors radially. By adjusting the radial position of sectors, the curvature outline and diameter of the deposition surface are modified to match the specific geometric requirements of different tire sizes, maintaining manufacturing precision while reducing the number of drums needed
2Adaptability or versatility
If a single forming drum is used for multiple tire sizes, then storage space and costs are minimized, but the complexity of adjusting the deposition surface increases
Solution Approach 1:
The forming drum is divided into multiple independent sectors that can move radially. This segmentation allows each sector to be adjusted independently or collectively, simplifying the overall adjustment mechanism compared to redesigning the entire drum for each tire size, while maintaining storage efficiency
Solution Approach 2:
The radially movable sectors provide a dynamic adjustment mechanism that, while adding some complexity, offers precise and flexible control over the deposition surface geometry. This dynamic capability allows a single drum to replace multiple fixed drums, balancing the increased adjustment complexity against the benefit of reduced storage requirements
Data Source
AI summary
During building of tyres, at least one first forming drum is employed which has a deposition surface and includes sectors radially movable relative to a geometric rotation axis, and circumferentially distributed one after the other. A plurality of strip-like elements is deposited in circumferential side by side relationship on the deposition surface set in the first deposition configuration, to form at least one component of at least one first crown structure. Setting of the deposition surface includes the actions of radially moving the sectors to give the deposition surface a predetermined diameter and carry out a relative movement between a central portion and axially external end portions of each sector to shape the deposition surface according to a predetermined curvature outline.