Oven Bag Heated Build Chamber (parametric)

thingiverse

A heated build chamber which uses an oven/turkey bag. This has the advantage of being easy and cheap to make as well as not weakening all the plastic parts in your RepRap, unlike fully enclosing your machine. Instructions There's not really much to this. Just get a cheap oven roasting bag of the right size and cut it so that it forms a single sheet. Then print out the guard/retained and attach to an appropriate point on your extruder. If you use an extruder other than a Budaschnozzle, simply modify the parametric openSCAD file. Note that it will give a design with a circular hole. Then all you have to do is hold the bag down on the corners of your bed using bulldog clips then tape or use rubber bands to fix the other end of the bag to the guard. I found this technique to be pretty effective, zero warp in the part that I printed, though it wasn't a particularly hard print anyway. At a guess, I would say that the temperature within the bag is at least 50 or 60 degrees C. A few things to note: This has to be printed in ABS due to how close it is to the extruder. Make sure you don't block off any heatsinks or dissipation devices on your extruder. Thermal barriers, such as the PEEK parts should be OK as they don't really have to do any dissipating. At least my extruder was working fine. This design is nowhere near perfect. For one, the guard should be made a bit shorter to provide more clearance from stuff on the bed like bulldog clips. Also, the bag tends to slip on the guard so a rim or something could be added. Watch out for the guard warping under heat as well. Though mine didn't have any catastrophic softening, the edge of the guard shrunk a bit from the constant force of a rubber band holding the bag on it.