Bead Wire Pressing Jaws Control Coating Creep
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Solution Overview
Problem
The geometric singularity at the overlap zone of metal-reinforced beads in vehicle tires causes vibrations and geometric irregularities during vehicle rolling, and existing pressing methods lead to creep and residues.
Innovation Solution
A method using a press with at least three jaws to control the coating material flow and shape the bead wire, reducing vibrations by pressing the rod between multiple jaws, and a press with movable jaws and a non-stick coating to improve material control and geometric regularity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the overlap zone is pressed between two jaws, then the geometric singularity is eliminated, but creep and pressing residues are generated
Solution Approach 1:
The pressing operation is segmented into multiple sequential pressing zones along the bead wire, with each zone pressed independently by separate pressing elements. This prevents material creep from propagating across the entire overlap region and eliminates pressing residues by confining deformation to discrete segments.
Solution Approach 2:
Different pressing forces and pressures are applied to different zones of the overlap region. The pressing elements are configured to apply localized pressure distributions that optimize material flow control in each specific zone, preventing both creep and residue formation while maintaining geometric regularity.
2Manufacturing precision
If the rod is pressed by a pressing device, then the profile regularity is improved, but material flow control becomes difficult
Solution Approach 1:
The pressing elements are made movable rather than fixed, allowing them to adapt their position and pressure application points dynamically during the pressing operation. This enables real-time adjustment of material flow patterns while maintaining consistent profile regularity throughout the bead wire.
Solution Approach 2:
The pressing system incorporates feedback mechanisms that monitor material flow and pressure distribution during pressing. This feedback enables automatic adjustment of pressing forces to maintain optimal material flow control while achieving the desired profile regularity.
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 reduces vibrations and improves the regularity of the bead wire profile, preventing creep and geometric irregularities, while allowing for easy orientation of the bead wires during tire production.
Implementation Method 1
the bead is pressed by means of at least three jaws in contact with an entire perimeter of a section of the zone
Implementation Method 2
this pressing causes creep between the jaws of the rubber forming the coating
Data Source
Figure 1~6
Figure 3~4
Figure 7~10
AI summary
The invention relates to a method for manufacturing a bead wire for producing a tire. According to said method, the bead wire includes a coating that forms an area wherein it overlaps itself in a circumferential direction of the bead wire. The bead wire is pressed by means of at least three jaws (8, 10, 12, 14) in contact with a perimeter of a section of said area.