Candy propellant casting machine

Resumo

In the solid propellant manufacturing process, one of the most important steps is the casting that consists in pouring the propellant in its more fluid state in a mold and then leaving it to cure or solidify. This step is very important because, if done wrong, could yield a propellant grain that contain lots of discontinuities such as voids and cracks and these could lead to a motor explosion. In a previous casting method, the propellant was subjected to stress of compression, but for candy propellants, that have a crystalline characteristics, this stress due to compression increase the chances of a crack in the grain. Thus, is necessary to change the casting process and the new process developed is described in this article.