After metal casting the ceramic shells are to be broken away to reveal the castings. This breaking of the shell is termed as ‘Knock out’. The knock-out is done by a pneumatic hammer, provided with a variable position carriage for clamping IC poured trees.
Two models are available:
I. PKO-AC is with acoustic insulation.
II. PKO is without acoustic insulation. Acoustic insulation will reduce noise by about 60%.