In general, the feed can be shut off and molding continued on cycle until the screw is run dry. If you are changing to another material, purge with polycarbonate, acrylic, styrene, or commercial purge compound, run the screw dry, and turn off the power.

ALWAYS LEAVE THE SCREW FORWARD; otherwise, a large slug of material must be remelted. If the slug does not fully melt before the screw is injected forward, check ring damage may result.