Drug-device combination assembly: insert prefilled syringe into autoinjector housing and snap subassemblies

For self-administered biologics, AstraZeneca develops drug-device combination products in which a glass prefilled syringe is assembled into an autoinjector by inserting the syringe into a holder and then plugging/locking subassemblies (e.g. an A-half and B-half, plus a spring power-pack) together to a non-separable seated position. The objects are a fragile glass prefilled syringe with attached needle/needle-shield and rigid plastic device halves with snap features. The task sits at final device assembly downstream of fill-finish. It is hard for a robot because the assembly applies significant force, and the syringe is fragile — patent and device literature explicitly flag a significant risk that the glass syringe breaks under drive/assembly forces — while incomplete snap engagement yields a latent functional defect. Force and seating feedback are essential to seat without shattering and to confirm full lock-up. We identified this through our own research; we have not confirmed the specifics with the customer directly. This page is our researched read — a starting point for that conversation.