Current score line plate on die cut is too thin to use for KL250 BCF. It force sharp mark on liner and possible to break when box be forming.
So, design engineer is looking 2 choice to improve die cut
1) Increase thickness of die cut flap score line plate
or 2) Add hard rubber close to flap score line plate to reduce shape force on liner.
And last choice is to change to general RSC box process flow and revise RM sheet board to complete
S-line flap from supplier (to shorten process).