Expandable Tire Drum With Magnetic Deck Fixing
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Solution Overview
Problem
Conventional tire building drums with rigid segments cause irregularities in tire formation due to out-of-round surfaces, leading to undesirable effects like vibration and noise in finished tires.
Innovation Solution
An expandable belt and tread drum with magnetic deck fixing, featuring a deck segment carrier with rotatable magnet housing and magnetic members that attach and detach deck segments, allowing for adjustable circumference and reducing imprints and bulges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid segments are used to form the drum circumference, then structural strength is improved, but manufacturing precision deteriorates due to out-of-round surfaces causing imprints and bulges
Solution Approach 1:
The drum circumference is divided into multiple adjustable segments that can be independently positioned. This segmentation allows the drum to be configured with different segment arrangements to achieve perfectly-round surfaces at various circumferences, resolving the out-of-round issue while maintaining structural integrity through the segmented modular design
Solution Approach 2:
The drum structure is made dynamically adjustable through movable segments that can be repositioned along the drum circumference. This dynamic capability allows the segments to be adjusted to different positions to compensate for out-of-round conditions at various drum sizes, enabling perfectly-round surfaces to be achieved at multiple circumferences
2Adaptability or versatility
If the drum circumference is adjusted to large diameters, then adaptability is improved, but manufacturing precision deteriorates due to out-of-round regions appearing
Solution Approach 1:
The circumference is divided into multiple segments that can be independently positioned and adjusted. This segmentation enables the drum to be configured for different large diameters while maintaining perfect roundness by distributing and adjusting segment positions to compensate for geometric deviations that would otherwise occur at larger circumferences
Solution Approach 2:
The segment positions are made variable and adjustable along the drum circumference. By changing the positional parameters of individual segments, the drum can be optimized to achieve perfectly-round surfaces at various circumferences, including large diameters, thereby maintaining manufacturing precision across the full range of adaptability
3Stability of the object's composition
If high pressure is applied to maintain uniform toroid shape, then shape stability is improved, but harmful factors increase due to imprints and bulges on the tire component
Solution Approach 1:
The drum segments are made dynamically adjustable to maintain optimal contact with the tire component during formation. By dynamically positioning segments to perfectly align with the desired toroid shape, the system can achieve shape stability with reduced pressure, avoiding the harmful imprints and bulges that result from high pressure applied by fixed, out-of-round segments
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 magnetic deck fixing system enables the use of differently sized deck segments, minimizing irregularities and enhancing tire manufacturing efficiency by avoiding out-of-round issues, thus reducing vibration and noise in rolling tires.
Implementation Method 1
one or more magnetic members provided to the deck segment carrier and configured to attach a deck segment to the deck segment carrier by magnetic force
Data Source
AI summary
An expandable belt and tread drum with magnetic deck fixing includes an assembly defining a portion of an arcuate outer circumferential working surface of a tire building drum. The assembly comprises a deck segment carrier and one or more magnetic members provided to the deck segment carrier and configured to attach a deck segment to the deck segment carrier by magnetic force.