older model of shrinker jaws
Below photo, comparison result:
- on the left - ordinary shrinking jaws
- on the right (above the blue font) - result of the work
using modified jaws with a labyrinth
Modified jaws with a labyrinth make it difficult to form folds -
also during more aggressive work. In the upset zone
a "closed" space is created.
The space between the teeth in the labyrinth area
is slightly lower than the teeth tops.
Due to this, each upset cycle is limited
for allowable upset - limited by the volume of space in the labyrinth area.