WHAT HAPPENS IN SLITING

 WHAT HAPPENS IN SLITING

As the metal strip enters the knives (step 1), the knives penetrate the strip (step 2) unti the forces exceed the ultimate tensile strength of the material and the strip separates (step 3). The penetration is commonly called the nick and the separation is called the break. The depth of penetration is determined by the ultimate tensile strength of the material and its relationship to the yield strength and the thickness of the strip.

When knife clearance is correct and the knives are in good condition, a good slit edge will be produced.The ideal slit edge will have: 

*A shiny penetration zone (or nick) 

*A smooth, matte grey separation zone (the break)

*A relatively straight demarcation line between the two zones