Molding and Casting

Materials
   wax
      low-temperature
      machineable (9389K61)
   urethane (121/30 dry)
   plaster (gypsum, calcium sulfate)
     polymer
     cement
   additives
   low-temperature alloys

Molding
   types
      injection
      insert
      blow  
      vacuum forming
      lost-wax
      flexible
   molds
      sprue
      gate
      runner
      vent
   release
      taper
      release agents
   materials
      mixing
      deairing
      curing
      drying

Machining
   direction
      conventional
      climb  
   end-mills
      center-cutting
      ball-end
   cuts
      rough
      finish  

cad.py
   mold.cad
   cat file.rml > /dev/ttyS0

assignment
   design a mold and cast a 3D part