- Recycled fiber
- Stock preparation
-
Board and paper machines
- New lines
- Rebuilds
- Approach flow system
- Headbox
- Forming
- Pressing
- Drying
- Process ventilation
- Sizing
- Coating
- Chemical systems
- Coating drying
- Calendering
- Reeling
- Winders and roll handling
- Pilot trials
- Paper and board grades
- Sustainable performance
-
Services for board and paper
- Spare parts
- Maintenance and shutdown management
- Outsourcing services
- Production consumables
- Process support and optimization
-
Process and automation upgrades
- Paper machine automation services
- Automation upgrades and roadmapping services
- Process improvements
- Industrial internet and remote solutions
- Roll services
- Service agreements
- Automation services
- Valmet's way to serve
- Service Centers
- Automation for board and paper
Shear angle
All slitting positions need a positive shear ang
le. Using a large scrap of paper, run the paper thru the cut point in the forward and reverse directions. The forward direction should provide a better cut quality.
Shear (cant) angle is the angular relationship between the lower band and the upper blade. The best shear angle for a specific product is the minimum angle required to reliably slit the web. The steeper the shear angle, the faster the blade will wear. The shear angle can be measured by inserting a feeler gauge between the top blade and bottom band behind the cut point. The greater the chord (a straight line joining two points on a curve), the larger the measured gap will be.