Mechanical Tire-Building Drum for Parallel Bead and Sidewall Attachment
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Solution Overview
Problem
Existing tire building methods using mechanical drums are time-consuming and inefficient due to sequential performance of bead-filler attaching and sidewall turning processes, leading to low production efficiency and high defective tire rates.
Innovation Solution
A method for building tires that simultaneously performs the bead-filler attaching and sidewall turning processes using a mechanical drum with a spindle assembly, turn-up mechanism, and attaching mechanism, allowing for simultaneous rolling of bead filler and sidewall attachment to the tire carcass, and a structure that avoids motion interference between these processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mechanical drum is used for tire building, then cost is low, but building process must be performed sequentially resulting in long building time and low efficiency
Solution Approach 1:
The patent combines the bead-filler attaching mechanism and sidewall turn-up mechanism into a single integrated mechanical drum system. The attaching mechanism and turn-up mechanism share the same drum structure and can operate simultaneously on different sections of the tire carcass, eliminating the need for sequential processing while maintaining cost-effectiveness compared to capsule drums.
Solution Approach 2:
The mechanical drum is divided into distinct functional zones: the attaching mechanism for applying bead filler to specific sections and the turn-up mechanism for rolling sidewalls to other sections. This segmentation allows independent operation of each mechanism, enabling parallel processing of different tire components without interference.
2Ease of operation
If bead-filler attaching is completed before sidewall turning, then motion interference is avoided, but total building time increases
Solution Approach 1:
The patent resolves the coordination problem by operating the attaching mechanism and turn-up mechanism in different spatial dimensions along the tire carcass. The attaching mechanism works on one section while the turn-up mechanism simultaneously works on another section, transforming the sequential time dimension into a parallel spatial arrangement that eliminates waiting time without causing motion interference.
3Manufacturing precision
If capsule drum is used, then sidewall attachment avoids indentations, but capsule replacement is cumbersome and cost is high
Solution Approach 1:
The patent replaces the pneumatic capsule system with a mechanical drum-based system. Instead of using inflated capsules to attach sidewalls, the mechanical drum uses a controlled rolling and pressing mechanism that achieves the same sidewall attachment quality without indentations, while eliminating the complexity of capsule inflation, positioning, and replacement operations.
Data Source
AI summary
The present disclosure provides a tire building method and a mechanical drum. The tire building method includes: step S1: controlling an attaching mechanism to roll a bead filler to attach the bead filler to a tire carcass; step S2: while attaching the bead filler or during a process of attaching the bead filler, controlling a turn-up mechanism to roll a sidewall so as to attach the sidewall to the tire carcass. The tire building method according to the present disclosure solves problems of long time of building the tire and low efficiency of building the tire in the related art.