Coroplast Plastic Cardboard Safety Cutter

thingiverse

This is a tool that combined with a standard single-edge 39x19mm razor blade can rapidly and safely slice a Coroplast sheet centered in the extrusion flute. Created for use building my heat recovery ventilator project at http://hackaday.io/project/2517-Entropy-Wheel-Heat-Recovery-Ventilator. *** NEW Arrival: the cross-cut blade. Made for cutting "across the grain". Still printing first draft to test. Instructions Sketched in Visio to get a 2D concept, then rendered in OpenSCAD. Will add OpenSCAD code when firmed up. You will need to rotate it to sit upright on its back, flat edge to print without support. Use high resolution settings. You will need a raft to prevent wobble from ruining your print. Hopefully the 0.41mm slot will print open without closing up. Blades are only 0.25mm thick, so it is challenge. Added some things: stabilizers that snap off after printing. Also recommend 25% infill, 2 shells, 220C with ABS to print, and PRINT TWO COPIES AT ONCE OR ONE CROSSCUT GUIDE WITH IT. The design is small so it doesn't cool fast enough when printed alone. Use a raft. Razor slot is tight but the 0.25mm thick blade cuts through the slag with a little push. Pretty tight to cut but guidance is perfect.