Page 22 - Training 2019

ROTARY KNIFE ANVILS:
Then finally we have rotary anvils that we are all more familiar with.

INTRODUCTION:

There are three types of slitting options that most of our customers are using in their printing
plants. The type of substrate, printing application and the desired affect the customer wants
to achieve will determine what type of slitting system they will have. Some of the modern
slitting machines might have two different types of slitting systems on the same slitter
rewinding machines.

Shear Cut Slitting, Crush Cut and Burst Slitting are the most popular forms of slitting
on reel to reel machines. Then we have Sheeting and Guillotine cutting. Sheeting is
normal done where they convert rolls of paper into sheets, while Guillotine cutting is where
finished Litho printed sheets are guillotined to final size.

Rotary Blades (Dished or Flat Blades) fall under the Shear Cut Slitting group of slitting
systems. In Shear Cut Slitting there is a top knife and a bottom anvil. The two work in
conjunction to form a rotary scissor cutting action that will separated the substrate (web).
See Products Group 36, 24, 10 and 27.

Crush Cutting is the second method of web separation. In this process only one blade is
used to accomplish the web separation. The web is actually pinched or crushed apart. The
Crush Cutting Blade is pinched against a hardened bottom roller called an anvil at 1 to 6 Bar
(84 PSI) of downward pressure. See Product group 20

Burst Slitting is when a Razor or similar type of blade is used to slit the web. This is the
most cost-effective way of slitting your flexible plastic materials. See Product Group 18

ANVIL TRAINING MANUAL 5
Updated - 24 June 2019