by unfold, published
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These are the files for the first prototype of a clay extruding print head for a Bits From Bytes Rapman. Its a slightly improved version of the one we use for printing our initial ceramics objects (unfoldfab.blogspot.com). The design is based on the Frostruder by Zach Hoeken from Makerbot but uses one double action solenoid valve instead of two single action ones. It is important to note that it was never designed with elegance or easy printability in mind, its just a quick and dirty prototype.
The Claystruder is designed on top of a spare rapman extruder mounting plate that I had around. The DXF for the mounting plate is attached. Laser cut out of 5mm material. The claystruder base that holds the syringe is glued on top of the mounting plate. Two feet fit in appropriate holes of the plate. (see, not very elegant...)
The two STL's that make up the claystruder need to be printed with support turned on. It is kept to the minimum but its not completely without overhangs.
You can fit most 50-60 cc syringes in the base of the Claystruder.
The cap is also a mounting base for a 12v DC 6012, 3/2-Way Miniature Solenoid Valve from Burkert: (http://www.burkert.com/COM/Products/Solenoid-valves/Water-and-other-neutral-media/6012.html). You will also need two screw on connectors for the tubing. On short tube goes straight down true the cap and should end 5-10 mm below the bottom. Here you can fit a rubber plunger cap from a 60cc syringe that you perforate to guide the tube true the rubber cap. This will make sure that your syringe is air tight. On top of the valve goes your tube that runs from the compressor. At the front of the valve is the pressure release outlet.
I always use two small clamps to hold the cap and the base together. You will need to fit something on the base plate to trigger your limit switches. I use a threaded rod and a few bolts.
Like for the Frostruder, you need a compressor, 10 bar max, for it to work.
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Claystruder 1.1 by unfold is licensed under the Creative Commons - Attribution - Share Alike license.
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