Glass Fiber Nozzle Structure for Flat Fiber Shape and Longer Life
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Solution Overview
Problem
Existing nozzle structures for producing flat cross-section glass fibers are complex, prone to damage, and have a short service cycle, leading to difficulties in continuous production.
Innovation Solution
A glass fiber nozzle structure with an upper and lower hole portion, where the lower hole portion has an elongated cross-section and a 5:1 to 12:1 aspect ratio, and the upper hole portion is tapered, increasing viscosity and facilitating the formation of flat glass fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a complex nozzle structure is used to produce flat cross-section glass fibers, then the flat glass fiber can be formed, but the nozzle becomes prone to damage and has a short service cycle
Solution Approach 1:
The nozzle hole is divided into two distinct portions: an upper hole portion and a lower hole portion. The upper hole portion has a larger cross-sectional area that gradually tapers to the lower hole portion, which has an elongated cross-section. This segmentation allows the molten glass to be progressively shaped, reducing stress concentration and preventing damage while achieving the flat cross-section shape.
Solution Approach 2:
Different portions of the hole have different cross-sectional characteristics. The upper hole portion has a larger area that gradually decreases, while the lower hole portion has an elongated cross-section with a specific aspect ratio (5:1 to 12:1). This local variation in geometry allows the molten glass to be shaped into flat cross-section fibers while distributing mechanical stresses to prevent nozzle damage.
2Shape
If a complex nozzle structure is used to produce flat glass fibers, then the flat cross-section shape is achieved, but the processing becomes difficult
Solution Approach 1:
The hole is segmented into an upper portion and a lower portion with distinct geometric characteristics. This segmentation simplifies the manufacturing process by allowing each portion to be formed using appropriate techniques, avoiding the need to create a single complex geometry that would be difficult to process.
Solution Approach 2:
The upper hole portion has a larger cross-sectional area that gradually tapers, while the lower hole portion has an elongated cross-section. This local differentiation in geometry allows for simplified processing of each section while achieving the overall flat cross-section shape, making the nozzle easier to manufacture.
3Shape
If the lower hole portion has a small aspect ratio, then the flat glass fiber formation is difficult, but if the aspect ratio is too large, the nozzle becomes more complex and prone to damage
Solution Approach 1:
The aspect ratio of the lower hole portion is optimized to a specific range (5:1 to 12:1). This parameter optimization ensures that the molten glass can be effectively shaped into flat cross-section fibers while maintaining nozzle durability. The upper hole portion's gradual tapering further controls the flow to achieve the desired shape without excessive complexity.
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 design enhances processing accuracy, improves the service cycle of the nozzle, and ensures the production of flat glass fibers with controlled dimensions and improved performance.
Implementation Method 1
the viscosity-increasing upper hole portion of the nozzle on the bushing is arranged opposite to the liquid outlet
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present application provides a glass fiber nozzle structure, bushing and production device. The glass fiber nozzle structure includes a nozzle body and a hole provided on the nozzle body. The hole includes an upper hole portion and a lower hole portion communicated with the upper hole portion and located below the upper hole portion. The lower hole portion has an elongated cross-section. A projection of the lower hole portion is located within a projection of the upper hole portion in a projection on a plane perpendicular to an axis line of the lower hole portion. A length and a width of the lower hole portion have a ratio of 5:1 to 12:1. The glass fiber nozzle of the present application has a simple structure and a long service cycle, and an aspect ratio of flat glass fibers produced by the nozzle structure is maintained between 2.7 and 4.2, thereby effectively improving performance of the flat glass fibers.