Die Defect

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Die Defect

In numismatics, any damage that affects the die, which is the metal stamp engraving a coin. This may damage the coin, which could affect its value for collectors.
References in periodicals archive ?
The empirical relations between die lines and die defects, material properties and affecting operating conditions are explored using the dimensionless groups.
In particular, we investigate how die defects, material properties and operating conditions affect die lines.
This could be due to 1) slightly misshapen die defects, 2) imperfections in sample preparation, 3) mandrel eccentricity in the film blowing dies, or 4) sample misalignment during stylus profiling.
This is presumably because widening die defects enlarges the die line radii, thus reducing the surface tension and die line dissipation (1, 2).
The proximity of die defects to die lips determines how long the polymer melt has to recover before exiting the die, thus governing the occurrence of these kinds of die lines.
Other die defects behaved similarly and results for HDPE resembled those seen in Fig.
Alternatively, we can define angles in radians for both die defects and die lines.
For both die defects, die lines widen and deepen with asperity radius (semicircular) or width (triangular).
Interestingly, the dependence of die lines on die defects weakens with larger die defects.
In our experiments, both die defects and operating conditions affected die line formation.
Both the heights and widths of rectangular die defects govern the die line sizes and shapes.
Developed over the past decade by experts in clean manufacturing strategies and fab quality management, Pentagon's best known methods (BKMs) have been proven to increase tool uptime, eliminate failed PM qualifications, and reduce test/conditioning wafers as well as die defects.