Fibre-forming Plate Curved Reverse for Stress Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fiberizing plates used in glass wool production face mechanical and thermal stresses, leading to premature wear and costly replacements due to erosion and chromium depletion, with existing solutions either reducing mechanical resistance or requiring additional components.
Innovation Solution
The development of new plate configurations with a frustoconical peripheral strip and a reverse extending from the lower part, forming specific angles to reduce mechanical stress and maintain drilling profiles, enhancing thermomechanical resistance without altering hole configurations or requiring additional elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the peripheral strip is extended in the lower part to form a reverse, then the mechanical stress and crack formation are reduced, but the plate geometry becomes more complex
Solution Approach 1:
The peripheral strip is extended in the lower part to form a reverse that curves back toward the central axis, creating a curved geometric structure. This curvature redistributes mechanical stresses away from the brittle pierced strip, reducing crack formation and extending plate lifespan without adding separate components.
Solution Approach 2:
The reverse extends the peripheral strip into a new spatial dimension by curving it back toward the central axis in the lower part of the plate. This dimensional transformation creates a stress-relief pathway that prevents cracks from propagating through the pierced strip, thereby improving reliability while maintaining a single-integral structure.
2Productivity
If more holes are incorporated in the peripheral strip to increase production capacity, then the passage section for molten glass is increased, but the mechanical resistance of the plate is degraded
Solution Approach 1:
The curved reverse structure in the lower part of the peripheral strip acts as a stress-distributing element that compensates for the mechanical weakness created by multiple holes in the pierced section. The curvature redirects stresses away from the hole-patterned area, allowing high production capacity with maintained structural integrity.
3Productivity
If the plate operates at high rotation speeds to increase fiber production, then the productivity is improved, but the mechanical stresses from centrifugal force and thermal gradients are intensified
Solution Approach 1:
The reverse structure's curvature in the lower peripheral strip creates a stress-distribution pattern that mitigates the intense centrifugal forces generated at high rotation speeds. The curved geometry redirects these forces away from the brittle pierced section, enabling high-speed operation without compromising the plate structure.
Solution Approach 2:
The reverse structure dynamically adapts to the centrifugal forces generated during rotation by its curved geometry, which allows the plate to better withstand the dynamic loading conditions at high rotation speeds. This dynamic stress distribution prevents mechanical failure while maintaining high productivity.
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 configuration significantly increases the lifespan of fiberizing plates by reducing irreversible deformations and delaying crack formation, demonstrated with a 15% average increase in lifespan under real fiber drawing conditions.
Implementation Method 1
the spinner normally rotates at a rotation speed of about 1500 to 3000 revolutions per minute. By the action of centrifugal force, the glass is pushed outwards and passes through the holes, forming fibers
Implementation Method 2
the rotation and the existence of thermal gradients lead to the appearance of high mechanical stresses by differential expansions
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a plate (1) for forming fibres of mineral fibres, in particular glass fibres, by centrifugation from a molten material, comprising: - a preferably frusto-conical peripheral strip (2) bored with openings (9) for passing the molten material and obtaining the fibres by stretching during said centrifugation; - a web (3) connecting said peripheral strip (2) to an upper collar (6) for securing the plate in a fibre-forming device; - a return (4) extending said peripheral strip (2) at the bottom of the plate and forming an angle b with same, said plate being characterised in that the angle b is strictly smaller than 90°.