TFT-LCD Float Glass Processing Line for Defect-Free Surface Flatness
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Solution Overview
Problem
Current TFT-LCD float glass substrate production lines, especially for large-size substrates, face challenges in achieving defect-free and extremely flat surfaces due to manufacturing processes like the float method, which result in micro defects such as tin dots and scratches, necessitating a high-precision and high-yield processing line.
Innovation Solution
A TFT-LCD float glass substrate processing line is designed with sequential working areas for precision cutting and edge grinding, surface grinding, and inspection and packaging, incorporating advanced devices like cold-end cutting devices, multi-axis edge grinding machines, surface inspection machines, and automatic transmission systems to ensure high precision and quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If float method is used for glass substrate production, then large-size substrates can be produced with good flatness, but the glass surface develops micro defects such as tin dots and scratches
Solution Approach 1:
The patent applies surface grinding processing to convert the harmful micro defects (tin dots and scratches) generated during float method production into removable surface irregularities. By grinding the glass surface, these defects are eliminated and the surface is restored to a defect-free state, transforming the harmful byproduct of float production into a correctable condition.
Solution Approach 2:
The patent performs surface grinding and cleaning as preliminary actions before the glass substrate reaches downstream manufacturers. This preliminary processing ensures that the surface defects are removed in advance, preventing them from affecting the final product quality and eliminating the need for downstream reprocessing.
2Reliability
If downstream manufacturers require defect-free surfaces, then production yield decreases due to rework and inspection, but quality standards must be maintained
Solution Approach 1:
The patent implements self-service by integrating surface grinding and cleaning processing into the float glass production line itself. The production line performs its own quality improvement operations, eliminating the need for external rework facilities and reducing dependency on downstream manufacturers to correct surface defects, thereby maintaining both quality and productivity.
Solution Approach 2:
The patent ensures continuous processing by integrating surface grinding and cleaning operations directly into the production flow. This eliminates interruptions for separate quality correction steps, maintaining continuous production while ensuring defect-free surfaces are achieved before substrates leave the production line, thus preserving both productivity and quality.
3Manufacturing precision
If precision cutting and edge grinding are performed, then substrate accuracy improves, but processing time and complexity increase
Solution Approach 1:
The patent merges precision cutting and edge grinding operations into a single integrated processing area. By combining these operations and using unified processing equipment, the system achieves high substrate accuracy while reducing overall processing complexity compared to separate, independent processing lines.
Solution Approach 2:
The processing equipment is designed with multi-functionality to perform both cutting and edge grinding operations. This universal equipment handles multiple tasks that would otherwise require separate specialized machines, thereby improving substrate accuracy while minimizing the increase in device complexity.
Data Source
AI summary
The embodiment of the present application proposes a TFT-LCD float glass substrate processing line, which is sequentially divided into a precision cutting and edge grinding working area, a surface grinding working area, and an inspection and packaging working area. In the precision cutting and edge grinding working area, a cold-end cutting device, a precision cutting and breaking device, a multi-axis edge grinding device, an after-edge-grinding cleaning device, a first edge inspection machine device, a first size measurement device, a grinding range measurement device, a flipping conveyor belt, and a loading frame are sequentially installed. In the surface grinding working area, a bonding machine entry conveyor belt, a first vacuum transfer suction cup, a bonding machine device, a surface grinding device, a peeling machine device, a second vacuum transfer suction cup, an after-surface-grinding cleaning machine, a first surface inspection machine device, a final cleaning machine, a third surface inspection machine device, a second edge inspection machine device, a second size measurement device, and a thickness measurement device.