Laser-Scored Glass Plate Void Layout to Prevent Pre-Separation
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Solution Overview
Problem
Glass plates often undergo unintended pre-separation during handling, leading to complications and quality degradation of glass articles due to scratches or cracks on end faces, which existing techniques fail to prevent effectively.
Innovation Solution
A glass plate design featuring separation lines formed by laser irradiation, including product lines and release lines with specific void arrays, where the internal void arrays for product lines have maximum and minimum lengths that are equal or greater than those of release lines, respectively, to prevent unintentional separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separation lines are formed by laser irradiation to enable glass article separation, then the glass plate can be divided into desired shapes, but pre-separation may occur unintentionally before the predetermined separation step
Solution Approach 1:
The separation line is segmented into product lines and release lines with different void array configurations. Product lines have internal void arrays extending from first to second main surfaces with lengths satisfying L1max ≥ L2max and L1min > L2min, while release lines have shorter internal void arrays. This segmentation prevents pre-separation by creating asymmetric bonding strengths that keep glass articles attached during handling but enable easy release during separation.
Solution Approach 2:
Different regions of the separation line are given different properties: product lines have internal void arrays with greater lengths to maintain strong bonding and prevent pre-separation, while release lines have internal void arrays with shorter lengths to facilitate easy separation. This local differentiation of void array characteristics allows the system to simultaneously achieve both pre-separation prevention and easy separation.
2Shape
If pre-separation occurs, then the glass plate can be divided into pieces, but the quality of glass articles is degraded due to scratches or cracks on end faces
Solution Approach 1:
The asymmetric void array configuration in the separation lines creates preliminary anti-action against pre-separation. The internal void arrays in product lines extend sufficiently deep (L1max ≥ L2max and L1min > L2min) to prevent unwanted separation during handling, while the release lines have shorter void arrays that allow controlled separation. This preliminary structural design prevents the harmful action of pre-separation before it can occur.
3Reliability
If internal void arrays are configured with specific length relationships (L1max ≥ L2max and L1min > L2min), then pre-separation is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The invention controls the length parameters of internal void arrays in separation lines to satisfy specific relationships (L1max ≥ L2max and L1min > L2min). By adjusting these dimensional parameters during laser irradiation processing, the system achieves pre-separation prevention while maintaining a relatively simple manufacturing process. The parameter control is implemented through laser processing conditions rather than complex mechanical structures.
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 glass plate design significantly reduces the likelihood of pre-separation, ensuring that glass articles are separated only during the intended process, maintaining the quality of the glass articles by minimizing scratches and cracks.
Implementation Method 1
separation lines being formed in the glass plate and on the first main surface by irradiating the glass plate with laser light
Data Source
Figure 1~2
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Figure 5~6
AI summary
Separation lines are formed in a glass plate having first and second main surfaces by irradiating with laser light. The separation lines are configured of a product line corresponding to an outline of a glass article to be separated; and a release line. The product line includes a first in-plane void array configured of in-plane voids arranged on the first main surface; and internal void arrays for product line, each having an in-plane void. The release line includes internal void arrays for release line. A maximum length of the internal void array for product line L1max is equal to a maximum length of the internal void array for release line L2max, and a minimum length of the internal void array for product line L1min is greater than a minimum length of the internal void array for release line L2min; or the length L1max is greater than the length L2max.