- Author
-
Langford, T. H.
|
Heffinger, J. G.
|
Musser, D. A.
|
Krajkowski, E. A.
- Title
- Elimination of Rolled Powder Fires. Final Report. November 1987-March 1990.
- Coporate
- Hercules Inc., Radford, VA
Army Ammunition Plant , Radford, VA
- Report
-
RAD-140.10; ARAED-CR-90013; ES-1A-6-8553
September 1990
336 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
powders
|
propellants
|
manufacturing
- Identifiers
- propellant paste; roll mills; roll fires; preolls; solventless propellant; evenspeeds
- Abstract
- This project was tasked to investigate equipment and/or process changes in solventless propellant manufacture for reducing the number of process fires that occur during the rolling operations. Closed circuit television cameras were installed in the preroll bay and evenspeed bay. Tapes of the preroll operations showed the fires initiating when blisters that formed on the propellant sheet folded over the trapped gases or when hard lumps created excess friction when being pulled into the bite of the rolls. All taped evenspeed fires began on the first pass through the roll and appeared to be caused by trapped air. Most solventless propellant roll fires are believed to be due to adiabatic compression caused by trapped gases or air. Some preroll fires are caused by fricton of hard propellant lumps rubbing on the metal rolls. Rising the prerolls with water every ten sheets reduced preroll fires. The studies alos showed that keeping the evenspeed feed stock warm helps reduce evenspeed fires.