Insert dropper/dip-tube and snap-close flip-top closures on filled bottles

For serums, oils and squeeze/flip-top personal-care bottles, a dip tube or dropper insert must be inserted into the neck and the flip-top or hinged cap pressed until it snaps fully closed. The motion is a controlled vertical insertion of a thin tube into a small bore followed by a press-to-snap on a living-hinge closure. Objects are small plastic parts with low rigidity; the closure must be fully engaged to seal, and partial engagement causes leaks downstream. This task sits at the closure station between filling and labeling on personal-care lines. It is difficult for a robot because both the tube insertion and the snap rely on tactile confirmation of full engagement that is invisible to a camera, and parts vary across SKUs and supplier lots. 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.