Platinum Nozzle Tip with Cut-outs for Flat Glass Fiber Production
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Solution Overview
Problem
Existing nozzle tips for producing glass fibers with a flat cross-sectional shape struggle to maintain an even temperature profile and stability of the glass melt, leading to difficulties in achieving a symmetrical, non-circular cross-sectional shape, particularly when made of platinum or platinum alloys, which have high wettability with glass melts.
Innovation Solution
A nozzle tip with a pair of long-side walls and short-side walls, each made of platinum or a platinum alloy, featuring a nozzle orifice with a flat hole shape and symmetrical cut-outs on both long-side walls, where the cut-out width is between 10-55% of the nozzle orifice's longitudinal center axis, ensuring an even temperature profile and stability of the glass melt flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nozzle tip made of platinum or platinum alloy is used to produce glass fibers with flat cross-section, then the chemical resistance and durability are improved, but the wettability with glass melt increases causing instability in glass melt flow
Solution Approach 1:
The nozzle tip employs different surface treatments on different regions: the inner wall surface has reduced wettability through specific coating or treatment, while the cut-out regions maintain high wettability to promote glass melt discharge. This local differentiation resolves the contradiction between overall durability and flow stability.
2Shape
If cut-outs are provided on long-side walls to increase glass melt viscosity and maintain shape, then the flat cross-sectional shape is achieved, but the temperature profile becomes uneven
Solution Approach 1:
The nozzle tip design incorporates asymmetrical cut-out configurations that are strategically positioned to compensate for thermal gradients. The cut-outs are distributed unevenly to balance temperature distribution while maintaining the flat cross-sectional shape of the glass melt.
3Productivity
If the cut-out width is increased to improve glass fiber production efficiency, then productivity increases, but the stability of glass melt flow decreases
Solution Approach 1:
The patent optimizes the cut-out width parameter within a specific range (10-55% of the nozzle inner diameter) to achieve the best balance between productivity and flow stability. This parameter optimization allows efficient glass fiber production while maintaining stable glass melt flow through the nozzle.
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 described nozzle tip effectively produces glass fibers with a flat, symmetrical cross-sectional shape, improving the efficiency and stability of the glass fiber production process by maintaining an even temperature profile and reducing pulsation, while allowing for easy adjustment of cut-out dimensions to optimize glass melt flow.
Implementation Method 1
Through the cut-out, cooling gas increases viscosity of the glass melt on the long-side in the nozzle
Implementation Method 2
drawing and discharging the glass melt out of the nozzle orifice, thereby quenching and fiberizing the glass melt
Data Source
AI summary
A nozzle tip for producing glass fibers has a pair of long-side walls and a pair of short-side walls, each of the long-side walls and the short-side walls containing platinum or a platinum alloy, and a nozzle orifice for discharging the glass melt, the nozzle orifice being formed by the long-side walls and the short-side walls. The nozzle orifice has a flat hole shape in horizontal cross-section. Each of the long-side walls has a cut-out on a discharge side of the glass melt, a width of the cut-out being 10-55% of a length of a longitudinal center axis of the flat hole shape of the nozzle orifice. The pair of long-side walls has a symmetrical shape about the center axis of the nozzle orifice. This nozzle tip makes it possible to efficiently produce glass fibers having a desired cross-sectional shape.