Die Defect

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 ?
Because die lines are commonly observed on blown film, we then conduct film blowing experiments to study how die lines depend on die defect size, shape and position and on various operating parameters.
Figure 3 shows a micrograph of a typical die defect with its die line.
Die line sizes strongly depend on die defect dimensions.
Importantly, both the die defect height and width govern the die line size and shape.
Figure 8 shows how die line height and base width depend on die defect sizes and polymer polydispersity (PI).
This result is expected since, in these experiments, the melt fully recovers from the die defect flow disturbance.
Though no other die defect shapes were tested, die line formation simulations show that semi-circular and triangular lip asperities also lead to bell-shaped die lines.
It differs from the local capillary number near die line (based on die defect size) that was used in the previous experiments.
We used a semicircular and three triangular asperities to probe how die defect shapes affect die lines.
Figure 21 discloses the dependence of die line depth and base width on die defect shape.
Figure 21 further proves that both the die defect height and width govern the die line size and shape.
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.