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 ?
In addition to repairing die defect, the technique also produced relatively few dangerous teratomas: Two out of 42 animals in the study developed the tumors.
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).
where [[alpha].sub.0] [equivalent to] [w.sub.0]/[h.sub.0] is the die defect shape factor.
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.
where w, [w.sub.0] are the die line and die defect widths, [D.sub.m] is the mandrel diameter and [D.sub.i] is the inner film bubble diameter.
It differs from the local capillary number near die line (based on die defect size) that was used in the previous experiments.
where [R.sub.0] is the die defect characteristic dimension.