Tire-Building Roller Lever with Spacer to Prevent Side Wall Folds
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Solution Overview
Problem
Existing tire-building devices face issues with unintentional formation of folds and material displacement during the turning up of tire side walls, particularly with thin materials, due to rotational movement of rollers, leading to production faults and frequent wear of components.
Innovation Solution
A device featuring a roller lever with a rotatably mounted roller, a spacer, and a segment that maintains minimal contact with the roller, allowing the roller to roll along the tire-building component without contacting the segment, thereby preventing rotational movement-induced faults, and incorporating anti-stick coatings and cam mechanisms to reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a roller lever system with pneumatic drive is used to turn up side walls, then the side walls can be turned up effectively, but rotational movement of the rollers causes formation of folds and displacement of material in thin side walls
Solution Approach 1:
A spacer element is introduced as an intermediary between the roller and the segment. This spacer prevents direct contact between the roller and segment, eliminating the rotational movement that causes folds while still allowing the roller to effectively turn up the side wall through the spacer mechanism
Solution Approach 2:
The system is divided into distinct functional elements: the roller lever mechanism for turning up, the spacer for preventing contact, and the segment for structural support. This segmentation allows each element to perform its specific function without interfering with others, particularly preventing the harmful rotational movement
2Strength
If rollers are in contact with both the tire-building component and the segment, then structural support is provided, but rotational movement occurs causing unacceptable faults in thin materials
Solution Approach 1:
The spacer acts as a mediator that maintains the necessary structural support function while preventing the harmful rotational movement. It allows the system to retain strength through proper support geometry while eliminating the reliability issue of fold formation
3Force
If the roller contacts the segment during turning up, then mechanical support is maintained, but the roller rolls in opposite directions causing material displacement and folds
Solution Approach 1:
The spacer serves as an intermediary that transmits the necessary mechanical support force from the segment to the roller lever system while preventing direct contact that would cause rotational movement and material displacement
Solution Approach 2:
Instead of allowing the roller to contact the segment directly (conventional approach), the invention inverts the arrangement by introducing a spacer that prevents this contact, thereby eliminating the harmful effect while maintaining the useful function through the spacer-mediated interaction
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 effectively prevents folds and faults in tire side walls, enabling the production of tires with a broader dimensional range by ensuring the roller only contacts the tire-building component, reducing wear and improving manufacturing efficiency.
Implementation Method 1
the roller rolls along the tire-building component
Implementation Method 2
incorporating anti-stick coatings and cam mechanisms to reduce friction
Data Source
AI summary
An apparatus for upturning a tire-building component on a tire-building drum has a roller lever. To provide an apparatus which is capable of upturning a tire-building component on a tire-building drum, and which achieves the upturn of the tire-building component without defects, in particular unintended creasing in the side wall, it is proposed that, during the procedure of preparation for upturning, a spacer provides separation between the roller and the segment in such a way that the roller is in essence in contact exclusively with the tire-building component. The roller therefore rolls along the tire-building component.