Here are some advantages and disadvantages of each some of the most popular slitting methods:
Shear slitting is the most common. It incorporates male and female knife blades. This slitting method cuts like a pair of scissors with the male knife side-loaded against the female knife blade.
- When properly applied, slitting dust can be minimal.
- Most common slitting type. Lots of suppliers to choose from.
- Most accurate cut.
- Well suited for very high speed applications.
- Can be automated to speed up knife blade set-up.
- Works well for almost any type of web.
- One of the most expensive types of slitting
- Can be time consuming to set up. Because both the male and female knife blades must be properly positioned relative to the web and relative to each other.
- Slitting Dust.
- Systems can be complex.
Score slitting is very common. It incorporates a score knife which is loaded against a hardened steel anvil. This slitting method cuts like a pizza cutter (for lack of a better comparison).
- This is a very common slitting method and there are lots of suppliers to choose from.
- Well suited for relative high speed applications.
- Very simple systems.
- Very easy and fast to set up.
- Low initial expense.
- Extremely high speeds can be a problem.
- Edge accuracy can be effected by knife wobble.
- Slitting dust.
- Not well suited for certain types of webs.
- Blades must be maintained properly.
Razor slitting is uncommon but it is used where necessary. Razor slitting incorporates a razor blade inserted into the web supported by lead in and lead out idle rolls or razor slitting can use grooved rolls for web support.
- Fast and easy to set up.
- Replacement blades are generally easy to get and they can be very inexpensive.
- Not well suited for high speed.
- Blades get dull, fast.
- Slit edge quality is usually the worst.
- Razor handling safety is a concern.
Written By: Jeffrey Damour, Sales Manager, Converter Accessory Corporation, Wind Gap, PA, Phone - 800-433-2413