Bead Core Positioning via Segmented Core-Setting Devices
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Solution Overview
Problem
Current tire-building machines, especially those using the finger-ply-down method, lack efficient automation for setting bead cores, leading to longer cycle times and manual intervention, which is inefficient and time-consuming.
Innovation Solution
The implementation of annular core-centering devices with variable diameters and moveable core-setting devices that allow for automatic positioning and centering of bead cores on both sides of the carcass drum, enabling simultaneous core placement and tire carcass building, thus reducing cycle time and increasing automation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If bead cores are set manually or with existing devices, then the setup is simple, but the cycle time increases and automation is reduced
Solution Approach 1:
The core-setting device is divided into multiple independent core-setting units, each capable of setting one or more bead cores. These units can operate independently and simultaneously, enabling automation while maintaining manageable complexity through modular design
Solution Approach 2:
The core-setting devices are designed to perform multiple functions: picking up cores from core-centering devices, transporting them across the carcass drum, and positioning them on the tire carcass. This multi-functionality reduces the need for separate devices for each operation
2Productivity
If bead cores are set sequentially one at a time, then the device structure is simple, but the productivity decreases
Solution Approach 1:
Multiple core-setting units are implemented to work in parallel, with each unit handling one or more bead cores simultaneously. This segmentation enables concurrent operations, significantly reducing cycle time while keeping each individual unit relatively simple
Solution Approach 2:
Multiple core-setting functions are combined into an integrated system that operates on both sides of the carcass drum. The devices work simultaneously to set multiple cores in parallel, improving productivity through coordinated multi-functional operation
3Speed
If cores are blown over the carcass drum with air nozzles, then the setting speed is fast, but the noise level increases and effectiveness with small core profiles is insufficient
Solution Approach 1:
Core-centering devices with variable diameter act as intermediaries to hold and position the bead cores before they are transferred to the tire carcass. This intermediary mechanism enables precise positioning of small core profiles without relying on high-velocity air streams, reducing noise while maintaining effectiveness
Solution Approach 2:
The pneumatic system (air nozzles) is replaced with a mechanical core-setting system that uses graspable core-centering devices. This mechanical approach provides controlled, quiet operation that is equally effective for small core profiles while eliminating the harmful noise associated with high-speed air blasting
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
This approach significantly reduces machine cycle times and enhances automation by allowing core positioning and centering to occur concurrently with other tire carcass construction steps, particularly during sidewall profile placement and rolling, resulting in a more efficient production process.
Implementation Method 1
two bellows supports with bellows, whereby the bellows are inflated with compressed air
Implementation Method 2
the one core is blown over the carcass drum from left to right or vice versa with air nozzles
Data Source
AI summary
Method and apparatus for positioning bead cores during a building of a radial tire carcass in a tire-building machine. The method includes positioning first and second bead cores on respective first and second core-centering devices, on a first side of a carcass drum and centering the first and second bead cores. Further, the method includes grasping, with a second core-setting device, the second bead core and transporting the second core-setting device and the second bead core to a second side of the carcass drum. Additionally, the method includes grasping, with a first core-setting device, the first bead core; and setting the first and second bead cores onto the tire carcass by the first and second core-setting devices.