|The Sandy Hill Rotoformer is a proven
specialty former that has produced a variety of specialty paper and
nonwoven webs. The original Rotoformer design (conceived in
the early 1950's) has remained virtually unchanged for over forty
As the specialty sheet manufacturer's markets have become more
demanding, so has the need for improved sheet properties from the
Rotoformer. Improvements in sheet basis weight profile, sheet
formation, ability to process special fibers and production of a
wide range of sheet types are quickly becoming necessities.
With the introduction of the Rotoformer 2000, Glens Falls
Interweb has addressed the shortcomings of the original Rotoformer
design. The design changes will provide substantial improvements
to the performance of the Rotoformer.
To allow production of a wide range of products a radial distributor
replaces the more traditional tapered flow spreader. The radial
distributor provides uniform CD flow / basis weight to the former,
independent of total flow rate. This capability will increase the
operating flow range of the Rotoformer 2000, allowing the
production of a wider range of products.
Following the radial distributor is a newly designed hydraulic
headbox. The advantage of the hydraulic headbox is that the internal
flow patterns are under precise control from the time stock exits
the distribution manifold until formation is complete. This feature
eliminates areas of non-uniform flow velocities, preventing light
fibers from floating and heavy fibers from falling out of suspension.
The headbox features improved construction with heavy weight machined
parts used throughout, giving very accurate and stable dimensioning.
Headbox adjustments are motorized, with digital readouts of all
The Rotoformer 2000 maintains all of the advantages of the
original Rotoformer, while providing the following improvements.
- Improved CD profile
- Acceptable operation over a wider flow range
- Ability to process a wider range of fiber types
- Improved headbox adjustments
- Improved repeatability of process settings
- Better internal access to headbox (for maintenance and clean