Plastic is injected into the mold and flows into the space between {TAIL ~ the core pin tip} and {HEAD ~ the clearance hole} forming a vestigial nozzle pilot cylinder around and over the ampule nozzle 
Plastic is injected into the mold and flows into the space between { TAIL ~ the core pin tip } and { HEAD ~ the clearance hole } forming a vestigial nozzle pilot cylinder around and over the ampule nozzle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH