Every assembly application involves multiple steps, but not every step presents the same level of difficulty. Before bonding parts, for example, an assembler will usually have little trouble preparing the dispensing system or fixturing parts. The bigger challenges involve selecting the right adhesive and making sure it is properly dispensed and cured.
Ammunition manufacturer Sellier and Bellot is familiar with these challenges, having faced them for many years while using a solvent-based sealant to seal the bullet and primer of various caliber ammunition (0.38, 0.40 S&W, 0.45, 0.357 and 0.308). Although dispensed automatically, the sealant required nearly a minute to cure and often caused the dispense valve to clog, resulting in low production rates.