4. Defects caused by die-cutting
These defects are of two types:
apparent defects leading to glass scrapping;
Invisible or inconspicuous defects that could lead to removal or subsequent breakage.
4.1 Apparent defects
Edge bevel: skewed edge cut due to non-homogeneous annealing, this bevel is more frequent on thicker materials (12 to 19 mm).
Broken beaks and corners: these are caused by the fracture deviating outside the tracing line (too slight a groove).
Shark's teeth: staircase steps consisting of slightly inclined planes separated by steep surfaces. This defect...
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Defects caused by die-cutting
Cutting methods
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Bibliography
- (1) - BARTON (S.), GUILLEMET (C.) - Le verre : science et technologie. - Éditions EDP Sciences, p. 77-83 (2005).
- (2) - SCHOLZE (H.) - Le verre. - Institut du Verre, Paris, p. 42-44, p. 70, p. 163-165, et p. 172-174 (1974).
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