Segmented Polishing Head Assembly for Float Glass Evenness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional glass polishing devices face challenges in maintaining evenness and uniformity, especially with larger float glasses, due to differences in linear velocities at various radii and non-uniform force application, leading to defects and uneven polishing, particularly at the edges.
Innovation Solution
A system with a head assembly comprising multiple smaller diameter heads arranged in a circular pattern, allowing for independent rotation and horizontal movement, and utilizing air springs for uniform pressure distribution, to minimize polishing differences and enhance evenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the polishing plate size is increased to polish larger float glass, then the polishing area is improved, but the evenness of polishing deteriorates due to different linear velocities at various radii
Solution Approach 1:
The polishing plate is divided into multiple independent polishing units (first, second, third, and fourth polishing units) arranged around the float glass. Each unit operates independently with its own driving mechanism, allowing individual control of polishing pressure and speed to compensate for radial velocity differences and maintain uniform polishing across the entire large glass surface.
2Area of stationary object
If the polishing plate size is increased to polish larger float glass, then the polishing area is improved, but the force uniformity deteriorates as force decreases outward from the center
Solution Approach 1:
The polishing system segments the force application into multiple independent polishing units distributed around the glass. Each unit applies force independently through controlled contact between polishing pads and glass surfaces, enabling uniform pressure distribution across the entire polishing area rather than relying on gravity from a single large plate.
Solution Approach 2:
The system uses driven rollers to actively apply polishing force through friction rather than relying on the self-weight of the polishing plate. The rollers rotate in contact with the glass surface, generating consistent polishing pressure through mechanical friction that compensates for the lack of gravitational force uniformity in large-scale systems.
3Area of stationary object
If the moving range of the polishing plate is increased to polish edge portions, then the coverage area is improved, but the balance in radial direction deteriorates causing over-polishing
Solution Approach 1:
The polishing system uses four segmented polishing units positioned at different locations around the float glass. This segmentation allows each unit to be independently controlled in terms of position and polishing intensity, enabling precise coverage of edge portions without causing over-polishing in other areas through unbalanced radial movement.
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 system achieves improved polishing evenness by reducing radial differences in polishing and ensuring uniform force application, effectively addressing the issues of unevenness and edge polishing in larger float glasses.
Implementation Method 1
a plurality of air springs for supporting the upper plate by means of an upward force corresponding to a weight of the upper plate
Implementation Method 2
the glass is polished using a slurry freely falling down onto the polishing plate
Data Source
AI summary
A system for polishing a float glass used for liquid crystal displays includes a lower unit configured to rotate a float glass to be polished, a head assembly configured to be rotatable in contact with the float glass, and a moving unit configured to move the head assembly in a horizontal direction, wherein the head assembly includes at least two heads that are rotatable, respectively.