Riser Nozzle for Dynamic Conductive Strip Positioning
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Solution Overview
Problem
Current tire manufacturing processes are costly and inflexible in positioning a conductive strip within the tread, requiring separate extrusion tools for each position and making it difficult to change the strip's position quickly.
Innovation Solution
A riser nozzle system that allows for the dynamic positioning of a conductive strip by varying the outlet position, using a flow channel with a slope and funnel shape to ensure continuous flow and reduce pressure loss, enabling the integration of conductive and non-conductive extrudable masses to form a strand of material with a conductive strip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a separate extrusion tool is produced for each possible position of the conductive strip, then the position of the conductive strip can be precisely controlled, but the manufacturing cost increases and the ability to change position at short notice is lost
Solution Approach 1:
A single extrusion tool is designed to perform multiple functions by producing conductive strips at different positions within the tread. The tool includes a movable component (such as a splice bar or riser nozzle) that can be repositioned along the extrusion direction to accommodate different strip positions, eliminating the need for separate tools for each position while maintaining precise control over the strip placement.
Solution Approach 2:
The extrusion tool incorporates dynamic elements that allow the conductive strip position to be adjusted during or between production runs. This may include movable molds, adjustable splice bars, or reconfigurable extrusion channels that can be quickly repositioned without requiring complete tool replacement, thereby achieving both precision and flexibility.
2Ease of manufacture
If the extrusion tool is simplified to reduce cost, then manufacturing becomes more economical, but the ability to control conductive strip position is compromised
Solution Approach 1:
The extrusion tool is divided into modular segments, with the position-controlling component (such as the splice bar or nozzle assembly) being a separate, independently adjustable module. This segmentation allows the main extrusion body to remain simple and cost-effective, while the modular position-control module can be precisely adjusted to achieve accurate strip placement without requiring complex integration throughout the entire tool.
3Adaptability or versatility
If the extrusion process is made flexible to allow rapid position changes, then adaptability improves, but the complexity of the extrusion tool increases
Solution Approach 1:
The position-adjustment mechanism is nested within the existing extrusion tool structure, with movable components (such as the splice bar or riser nozzle) being housed within or integrated into the main extrusion body. This nesting approach allows for adaptable position changes while minimizing the overall increase in tool complexity, as the adjustment mechanisms utilize the existing tool geometry and support structures.
Data Source
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Figure 3A
AI summary
The invention relates to a rising nozzle (1, 21) for producing a material strand (54) formed from at least two different extrudable masses (151, 152), comprising a nozzle body (2) with a nozzle inlet (9), an attachment (6, 26) with an outlet opening (7, 27) and a flow channel (10, 30) which connects the nozzle inlet (9) with the outlet opening (7, 27), wherein a height difference (ΔH) exists between the nozzle inlet (9) in the flow direction of a mass flow (ṁ) of the at least two different extrudable masses (151, 152) and the outlet opening (7, 27), which leads to a change in the height position of at least one of the extrudable masses (151, 152) when flowing through the flow channel (10, 30) of the rising nozzle (1, 21) with respect to the mean inflow height to the nozzle inlet (9). as well as an extrusion tool (50), a process and a vehicle tire (101).