3D Printing: Designing and Building a Filament Extruder

Here’s a DIY filament extruder

Here’s another DIY filament extruder

There are several critical parts to an extruder:

1. the arbor:  this moves the plastic bits along into the heater … here’s a 3/4″, 17″ long bit from mcmaster-carr

2. the temperature controlled section: this includes a band heater, a thermocouple, a solid state relay, and a feedback controller

3. the die: this is a pin-hole cut into a metal sheet

4. the thread cooling section: this is usually a fan to remove heat from the thread after it exits the die

5. a thread wrap: the DIY extruders let the thread pile up on the floor.  Better to wind the thread onto a spool

 

Posted in: Robotics

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