Injection Printing - Injection Molding with your 3D printer

Using the differing melting properties of ABS and PLA, you can use the functions of your 3D printer to make rudimentary injection molded parts.

For more information:
http://www.thingiverse.com/thing:83805

For even more information with complete instructions:
http://www.instructables.com/id/Use-Your-3D-Printer-As-An-Injection-Molder/