Glass Sheet Positioning via Laser Mark Projection and Resin Support
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Solution Overview
Problem
Existing glass sheet positioning technologies face challenges in accurately positioning a scribe line between tables due to gaps and difficulty in visualizing the scribe line, leading to potential defects like misaligned splitting and chipping.
Innovation Solution
A method involving a resin sheet under the glass sheet and laser markers to align one side of the glass sheet with projected marks, ensuring accurate positioning of the scribe line in the bending stress applying portion, even when the scribe line is difficult to see, and using a pair of foldable placement tables to apply bending stress for precise splitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a resin sheet is laid under the glass sheet to prevent scratches, then the glass sheet is protected from damage, but it becomes difficult to visually recognize the gap between tables and position the scribe line accurately
Solution Approach 1:
A resin sheet is introduced as an intermediary layer between the glass sheet and the placement table surface. This resin sheet serves as a protective mediator that prevents scratches on the glass sheet lower surface while still allowing the scribe line to be visually recognized through its translucent properties, thus resolving the contradiction between protection and positioning accuracy
Solution Approach 2:
The resin sheet is designed with specific optical properties (translucency) that allow light to pass through, enabling the scribe line on the glass sheet to be visually recognized through the resin sheet. This optical property change allows simultaneous achievement of scratch prevention and accurate positioning
2Productivity
If the scribe line is positioned between fixed table and rotary table with a gap, then the glass sheet can be split, but accurate positioning becomes difficult unless the scribe line is exactly at the center of the gap
Solution Approach 1:
The patent replaces the mechanical visual alignment method with an optical positioning system using a laser marker. The laser marker projects a reference mark that can be precisely aligned with the scribe line, substituting the need for visual estimation of gap centering with a more precise optical reference system
Solution Approach 2:
The laser marker is used to project a reference mark onto the placement table surface before the glass sheet is positioned. This preliminary marking action establishes a precise reference point that guides the positioning of the glass sheet, ensuring accurate alignment of the scribe line with the bending stress applying portion
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 method allows for accurate positioning and splitting of the glass sheet along the scribe line, reducing the risk of defects like misalignment and chipping, while protecting the glass sheet from scratches and enabling efficient operation.
Implementation Method 1
aligning one side of the glass sheet extending in a direction along the scribe line with a mark projected onto the placement table by a laser marker
Data Source
AI summary
After a glass sheet (G) having a scribe line (S) formed thereon is placed on a placement table (10) and positioned so that the scribe line (S) is positioned in a bending stress applying portion (15) of the placement table (10), when the glass sheet (G) is split along the scribe line (S) by applying a bending stress to a formation region of the scribe line (S) by the bending stress applying portion (15), the glass sheet (G) is positioned by laying a resin sheet (9) under the glass sheet (G) on the placement table (10) and aligning one side (G1) of the glass sheet (G) extending in a direction along the scribe line (S) with marks (Ma to Nd) projected onto a protruding portion (9a) of the resin sheet (9) by laser markers (16a to 16d).