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Plastifier - Assembly whereby polymer pellets are fed from
a Hopper into a barrel where they drop onto a turning screw which
forces the pellets forward. Heater bands wrapped around the barrel
melt the pellets as they are forced forward along the inside of
the barrel. The molten polymer is then forced out the end of the
barrel through the Nozzle.
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Nozzle - Hollow cored orifice that is screwed into the extrusion
end of the Plastifier. The nozzle is designed to form a seal under
pressure between the Plastifier and the Mold or Runner System. The
front end of a nozzle may be either flat or spherical in shape.
Narrow mouth vs. wide mouth, tall vs. short.
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