Extrusion-blow moulding of polymers:
reciprocating screw
compressed air;
hopper;
granules;
barrel;
heaters;
grinding, mixing;
actuator's hydraulic generator;
draw plate;
core/punch.
Own work, from http://en.wikipedia.org/wiki/File:Injection_molding.png
Cdang, Brendan Rockey, University of Alberta Industrial Design, Christophe Poret