Magnetic Strip Transfer Device for Tire Ply Assembly
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Solution Overview
Problem
Existing devices for assembling reinforcing plies in tire manufacturing struggle to maintain the geometric features of narrow strips during transfer, cutting, and assembly, leading to deformations and unwanted movements that impair the quality of the reinforcing ply.
Innovation Solution
A device with a feed means, assembly belt, and transfer means equipped with magnetic means and a retaining wall that adjusts magnetic field strength to keep the strip referenced throughout the process, ensuring it remains in contact with a known and controllable mechanical element, preventing free movement and maintaining geometric accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If magnetic means are used to hold the strip firmly during transfer and assembly, then the strip is prevented from unwanted movements and deformations, but the complexity of the device increases due to the need for controllable magnetic field strength adjustment
Solution Approach 1:
The magnetic field strength is made dynamically adjustable during the transfer process. The magnetic means can vary the field strength from high (to firmly hold the narrow strip during transfer and prevent deformations) to low (to allow easy placement on the assembly belt). This dynamic adjustment resolves the contradiction by providing strong holding force when needed while avoiding excessive complexity through controlled variability rather than multiple fixed systems.
Solution Approach 2:
The magnetic field parameter (strength) is changed during operation to match different process requirements. High magnetic field strength is applied during the transfer phase to prevent strip movements and deformations, then reduced during the assembly phase to facilitate placement. This parameter change approach maintains manufacturing precision while managing device complexity through a single controllable parameter.
2Manufacturing precision
If high-strength magnetic means are used to prevent strip deformations during transfer, then geometric accuracy is maintained, but the device becomes less compatible with existing industrial equipment
Solution Approach 1:
Rather than using permanently high-strength magnetic means that would be incompatible with existing equipment, the system employs dynamically adjustable magnetic strength. This allows the use of moderate-strength magnetic components that are compatible with industrial equipment, while achieving high geometric accuracy through temporary high-field application only during the critical transfer phase when the strip is most vulnerable to deformations.
3Stability of the object's composition
If the strip is kept referenced throughout the process, then unwanted movements are prevented, but the device complexity increases due to the need for continuous contact with known mechanical elements
Solution Approach 1:
The magnetic field acts as an intermediary force that maintains strip reference and position stability without requiring complex mechanical reference systems. The magnetic means creates a controllable force field that keeps the strip firmly referenced to the mechanical elements during transfer, then allows easy release during assembly. This intermediary approach provides stability while avoiding the complexity of continuous mechanical reference maintenance.
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 solution ensures the strip is accurately laid on the tire downstream, maintaining geometric precision and reducing the need for high-strength magnetic means, allowing for the use of low-strength magnets compatible with industrial equipment.
Implementation Method 1
magnetic means able to press the said strip firmly against the surface of the feed means, of the first face of the transfer means, and of the assembly belt
Implementation Method 2
magnetic means able to press the said strip firmly against the surface
Data Source
AI summary
A device for manufacturing a reinforcing ply N by assembling lengths of strip cut at an angle, comprising: a feed means (300) for delivering a strip (B), an assembly belt (101), a transfer means (200) for conveying onto the assembly belt a given length of straight-grain strip in a direction (AA′) comprising a retaining wall (211), parallel to the planes of the assembly belt (101) and of the feed means, and a first face (211a) of which is intended to come into contact with the surface of the strip, in which device the feed means (300), the transfer means (200) and the assembly belt (101) are fitted with magnetic means. The retaining wall (211) is able to move up and down and back and forth, and the magnetic means are adjusted so that when the device is in operation: in the lowered position, the said magnetic means of the transfer means (212) exert on the metallic threads of the strip a magnetic field of a strength higher than the strength of the magnetic field exerted by the magnetic means (102, 103, 104) positioned on the feed means (300), in the raised position, the said magnetic means of the transfer means (212) exert a magnetic field of a strength weaker than the strength of the magnetic field exerted by the magnetic means positioned on the assembly belt (101).