#contraption

Cast Twist (2013) — Eight Years to Cut a 3D-Printed Shape Into Castable Parts

Hanayama's Cast Twist (2013) began as a 3D-printed prototype in 2004 and was shelved as impossible to mass produce. It reached a box only after someone found a way to split its ring into three castable parts. The player sees two rings; the factory sees one ring cut apart and reassembled. Read from the designer's own making-of notes, it is a record of manufacturability choosing which shapes get to be played.