5.Relief depth
The relief depth refers to depth difference between pellet die total thickness and effective thickness. The design of the relief depth is meant to promote strength of pellet die by adopting thicker die while at the same time do not harm the flowing rate of feed stock.
6.Hole count
Hole count refers to the numbers of die holes in a die. The more die holes, the higher of the production capacity and the lower of pellet die strength. That’s to say, the hole count influence the pellet production capacity and pellet die working life.
- See more at: http://www.biofuelmachines.com/Study-on-Dies-for-Wood-Pellet-Machines.html#sthash.Q2baamrr.dpuf