Bead Forming Apparatus Radial Sliding Erection Arms
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Solution Overview
Problem
In existing bead manufacturing apparatuses, the bead filler's top end is stretched more than the base end, leading to wrinkling and instability due to adherence to segments, which can result in air trapping during vulcanization molding of green tires.
Innovation Solution
A bead forming apparatus with rotatable rollers on erection arms that allow the bead filler to slide radially, preventing wrinkling by enabling uniform erection and joining to the bead core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bead filler is adhered to the segments for integral erection, then the erection process is simplified, but wrinkling occurs on the apex making the shape unstable
Solution Approach 1:
The erection arm is segmented into multiple independent rollers instead of being a single adherent segment. Each roller can independently contact and support the bead filler at different positions, allowing the bead filler to be erected without being adhered to a single rigid segment, thus preventing wrinkling while maintaining erection efficiency
Solution Approach 2:
The erection system transitions from a static adherent segment to dynamic rollers that can rotate and adjust. The rollers rotate in the direction of bead filler movement, dynamically adapting to the deformation of the bead filler during erection, which prevents wrinkling while maintaining simple erection operation
2Shape
If the top end of the bead filler is stretched more than the base end, then the bead filler conforms to the drum shape, but wrinkling occurs due to differential extension
Solution Approach 1:
The rollers are designed to rotate dynamically during the erection process, allowing them to accommodate the differential stretching between the top end and base end of the bead filler. This dynamic rotation prevents wrinkling caused by the extension ratio difference while maintaining the required shape conformity to the drum
Solution Approach 2:
The system changes the operational parameters of the erection mechanism by using rotating rollers instead of fixed segments. The rotation speed and direction of the rollers can be adjusted to match the deformation characteristics of the bead filler during erection, resolving the contradiction between shape conformity and wrinkle prevention
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 apparatus ensures the bead filler slides smoothly during erection, maintaining uniformity and preventing wrinkling, thus enhancing the quality of the bead by allowing different tire diameters to be formed.
Implementation Method 1
a plurality of slide members provided as contact portions of the erection arms that come into contact with the bead filler so that the bead filler can be radially slidable relative to the erection arms
Data Source
AI summary
A bead forming apparatus including: a rotatable drum having a plurality of divided bodies dividedly arranged along a circumference and being adapted to be wrapped therearound with a belt-shaped bead filler having a short base and two other long sides in an annular shape; a plurality of erection arms provided along the circumference and swingably supported by the divided bodies of the rotatable drum so as to erect the bead filler by swinging the erection arms; and a swing device for swinging the erection arms; and a plurality of slide members provided as contact portions of the erection arms that come into contact with the bead filler so that the bead filler can be radially slidable relative to the erection arms.