All the little wisps of smoke that come off the extruder from time to time are quickly sucked right up!
My wife was complaining about the odor in the basement from all the melted plastic. I looked at some fume extractors, but they all worked on enclosing stuff off and sucking large amounts of air through the whole machine. I wanted to make something that works like a solder fume extractor where the nozzle is near the source of the odor and sucks those fumes in.
I came up with this design. It is not perfect, but my wife is no longer complaining about smells now.
Uses a simple carbon furnace filter cut to fit and an 80mm case fan. I attached the fan to the extruder fan power so it only kicks on when the heat is up on the extruder.
Downloads include all the .stl files and an NX .prt file that contains all the models.
You will need:
80mm case fan with 8X fan screws
2 m3 screws and nuts
sheet of activated carbon filter / or filter and granulated carbon
Print mouth, coupling, tube and tube 1 out. Assemble with a bit of acetone. Glue the coupling to the tube, tube1 and mouth together. Place the tube assembly onto the bottom of z stage. The coupling block has 2 holes in it, line up the assembly at the back of the z stage so it fits in the middle of the z screw and where the rib is attached. Mark and drill 2 holes into back of z stage for mounting with 2 X m3 screws.
Print out and screw your fan to the base part. Then glue base with fan to the coupling. (Note this is after you screw and attach the duct assembly to the z stage.)
Print filter, combs and filter lid. Use the comb that is different from the other 2 and glue it into the center of the filter. Attach the filter to the fan using 4 fan screws.
I purchased a activated carbon furnace filter from Home Depot. Cut the filter so it is the same width as the inside of the filter as long as you can. Pleat the filter by folding it back and forth in about 1/2 increments. Place the pleated carbon filter into the filter puting a pleat into each comb.
Then use the remaining 2 identical combs and place them into the filter with each tooth seperating a pleat. Each comb lines up with a notch on the filter. The snap filter lid over the filter.
Using the furnace filter is a serious pain in the booty. Pleating it and getting it all together is really not fun. I originally wanted to use granulated carbon and 2 small pieces of filter cut to cover the back of the filter and back of the filter lid. Then simply filling the space between with the granulated carbon. If you have the means of doing this, I would think this would be an easier solution.