Tyre Reinforcing Structure Winding Control
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Solution Overview
Problem
The existing methods for manufacturing tyres, particularly for heavy load vehicles, face issues with irregular coil spacing and structural detachment during the production of zero-degrees reinforcing layers due to the use of discrete magnets on forming supports, which affect the quality and consistency of the reinforcing structure.
Innovation Solution
The method involves controlling the attraction and tension forces during the winding process using a magnetic sheet or suction devices to ensure regular coil distribution and firm anchoring, preventing structural detachment by maintaining the attraction force below the coupling force between the reinforcing layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete magnets are used on forming supports to hold reinforcing elements, then the reinforcing structure can be built, but irregular coil spacing occurs and structural detachment happens during forming support contraction
Solution Approach 1:
The forming support is divided into multiple sectors, each equipped with independent magnetic sheets that can be individually controlled. This segmentation allows precise control of magnetic attraction force in different zones, enabling regular coil spacing while maintaining structural integrity during contraction.
Solution Approach 2:
The magnetic attraction force parameter is dynamically adjusted during the winding process. By controlling the intensity of magnetic fields from the magnetic sheets, the system maintains optimal attraction force for regular coil placement while preventing excessive force that would cause structural detachment during forming support contraction.
2Manufacturing precision
If magnetic sheets are used to control attraction force, then regular coil distribution is achieved, but the system complexity increases
Solution Approach 1:
The magnetic control function is extracted from traditional mechanical clamping systems and implemented through magnetic sheets integrated into the forming support sectors. This extraction simplifies the overall control mechanism while achieving precise coil distribution through magnetic field management.
Solution Approach 2:
The magnetic sheets serve multiple functions: they provide attraction force for coil placement, enable regular spacing control, and prevent structural detachment during contraction. This multi-functionality reduces the need for separate mechanical systems, thereby managing complexity.
3Strength
If tension force is applied during winding, then the reinforcing structure is compacted, but structural detachment occurs when forming support is contracted
Solution Approach 1:
The magnetic attraction force acts as a counterbalancing force to the tension force during winding. By carefully balancing these opposing forces, the system achieves proper compaction while preventing excessive tension that would cause structural detachment during forming support contraction.
Solution Approach 2:
The magnetic sheets provide continuous attraction force throughout the winding and contraction processes, cushioning against sudden tension variations. This prior cushioning prevents structural detachment by maintaining stable layer coupling before and during forming support contraction.
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
This approach ensures a stable and regular positioning of coils on the forming support, preventing structural detachment and achieving a high-quality reinforcing structure that remains firmly anchored even after the forming support is contracted.
Implementation Method 1
said magnetic sheets being suitable for generating a magnetic attraction force on said reinforced continuous elongated element
Implementation Method 2
or said suction devices being suitable for generating a suction force on said reinforced continuous elongated element
Data Source
AI summary
A method for controlling the building of a reinforcing structure of tyres for vehicle wheels comprises: exerting, on a head portion of a reinforced continuous elongated element (10) of elastomeric material, an attraction force towards a forming support (200); depositing the elongated element (10) on the forming support with a predetermined tension force to form a coiled winding; depositing at least one reinforcing layer in a radially outer position with respect to the coiled winding to form a reinforcing structure in which between the coiled winding and the reinforcing layer a mutual coupling force acts; separating the reinforcing structure from the forming support through radial contraction of the latter. At least one of the attraction force and the tension force is controlled so that the sum of such a force and the tension force is lower than the coupling force.