Metal Extruder and Syringe Pump

This is the final episode of a three-part mini-series on making things with low-melting-temperature-alloy. The collection of things here form a hot material transfer system that can be used to extrude (sort of) molten metal or wax. This is inspired by earlier work done by Dr. Sells and Prof. Bowyer http://reprap.org/bin/view/Main/AutomaticDepositionOfMoltenAlloyIntoACastingChannelToCreateAVerySimpleElectro-mechanicalComponent .

As usual, remember that low-melt alloys are toxic and hot eno