Roll covers for every application
The roll cover technology
Roll cover technology is a key factor in improving sheet release, reducing draw, improving dewatering performance, ensuring consistent coating and sizing, and achieving excellent calendering results. The various applications on the paper machine require a variety of roll cover designs and coating materials.
Materials range from ceramic coatings to very soft elastomeric covers
IntensePress for press rolls / IntenseFlow for suction press rolls
Voith has developed roll covers for pulp machines that meet demanding requirements like high temperatures and especially aggressive chemical stress.
The roll covers are made of a new polyurethane material with following benefits:
- Chemical resistance
- Heat resistance
- Low abrasion
- Damage resistance
- Hydrolysis stability
Find the perfect fitting roll cover for your calender
Thanks to our new Product Selector, you can configure your individual calender roll cover within a few steps. Together with our experts you will create a cover which is tailor-made for your application and priorities. As a result you not only increase the efficiency of your paper machine but also save money and participate always in the latest technology.
Find your perfect roll cover
Some of the rolls have to transmit the drive force to the fabric, while other rolls perform dewatering functions. The roll covers need to be doctorable and wear resistant, have good traction properties, and perform with no sheet marking. Voith offers roll covers in rubber, polyurethane, composite and resin, as well as hard metal coatings for the various applications in the forming section.
Roll types in the forming section:
- Breast Roll
- Couch Roll
- Forming Roll
- Table Roller
- Wire Drive Roll
- Wire Suction Roll
- Wire Guide Roll
High surface stability, no marking, sufficient operating volume, high wear resistance and impact resistance and doctorability are some of the necessary features a roll cover needs in the press section. Depending on the specific roll application, we offer polyurethane, rubber and thermal coatings.
Roll types in the press section:
- Center Press Roll
- Center Suction Press Roll
- Felt Guide Roll
- Glazing Cylinder Pressure Roll
- LNP Soft Roll
- Paper Guide Roll
- Pick-up Suction Press Roll
- Press Roll Hard
- Press Roll Hard Vented
- Press Roll Soft
- Shoe Press Counter-Roll
- Smoothing Press Roll
- Suction Press Roll
- Spreader Roll
In the harsh environments, cylinders and guide rolls are prone to contaminations and corrosions. They need special thermal and metal coatings for corrosion protection, as well as wear and contamination resistance. We offer specially developed coatings for all applications.
Roll types in the dryer section:
- Dryer Cylinder
- Dryer Wire Guide Roll
- Dryer Paper Guide Roll
- Spreader Roll
Using our sizing and coating roll cover knowledge combined with our expertise as a paper machine supplier, we are able to ensure the roll cover selected meets your expectations. Depending on the specific demands, we offer polyurethane and rubber roll covers.
Roll types in the coating and sizing section:
- Coater Applicator Roll
- Coater Backing Roll
- Paper Guide Roll
- Film Press Applicator Roll
- Spreader Roll
- Size Press Hard
- Size Press Soft
These properties are imparted to the paper by calenders, which are equipped with up to 15 rolls. Our calender roll cover product line offers an extensive cover choice for all application requirements. Optimized fiber-reinforced composite covers and world-class thermal coating covers provide optimum paper gloss, smoothness, and bulk while maintaining cover profile and surface consistency.
Roll types in the calender:
- Machine Calender Hard Coating
- Multi-Nip Calender Elastic Roll
- Mulit-Nip Calender Hard Coating
- Paper Guide Roll Calender
- Soft Nip Calender Elastic Roll
- Soft Nip Calender Hard Coating
- Super Calender Elastic Roll
- Super Calender Hard Roll
- Spreader Roll
We offer rubber or polyurethane covers on reel spools, providing a perfectly closed nip when starting the winding process on the spool and running smoother with reduced noise. During winding, the paper is cut into narrow rolls. Our polyurethane covers have superior cut resistance and remain in better condition for more consistent winding. We also offer thermal coatings that can be applied either on site or in one of our locations equipped with thermal spraying.
Roll types in the reeling and winding section:
- Reel Drum Hard
- Reel Drum Soft
- Reel Spool
- Rider Roll
- Squeeze Roll
- Winder Drum
Marking and splicing rolls are used for applications in which the roll covers must meet special requirements – such as very high wear resistance or a soft surface. For these special applications, we offer excellent roll covers.
Roll types for special applications:
- Marking Roll
- Splicing Roll
Coatings for Yankee cylinders must withstand rough conditions and therefore offer high wear and corrosion resistance. Depending on the specific tissue machine requirements, we offer different covers and coatings.
Roll types in tissue machines:
- Tissue Pressure and Suction Pressure Roll
- Yankee Cylinder
- MG Cylinder
NipSense2 is a system consisting of mats with highly sensitive sensors that are inserted in the nip. The data of the nip width are transmitted wirelessly to a computer with special analytical software and directly displayed. Changes in the nip profile can thus be followed directly on the screen. NipSense2 visualizes possible discrepancies in the crown, the closing process and the hydraulic systems in real time and a correction calculation is carried out.
- Improved paper quality
- Reduced risk of web breaks
- Fewer unscheduled shutdowns
- Longer service life for increased machine availability
Best material at low investment costs
Long service life and reduced maintenance costs thanks to wear and temperature-resistant materials
Smooth surface and low contamination
No corrosion problems
One expert for all guide roll covers
Increased performance level by combining AiroGuide C with tailored fabrics and doctor blades
EvoStretch and StretchUp Service
MatchPress and MatchFlow
Tissue mill awards long-term mechanical roll service contract and roll cover business to Voith based on performance
Voith’s expertise and quality products deliver savings to U.S. tissue mill
MegaFlow rubber roll cover delivers uniform profile and wear resistance to U.S. board mill
SolarPress covers and Total Roll Management program revive board machine
NipMaster analysis program for optimum dewatering
Designed for efficiency
The NipMaster concept exploits the surface design of suction and press rolls and comprehensively analyzes optimum dewatering characteristics.
How can we help you?
Our experts are happy to help you find the prefect roll cover for your application!
Services for roll covers - Part of your business
Your needs − our challenge! At Voith, the characteristics of roll covers are perfectly adjusted to the requirements. Thanks to our in-house mixing and compounding department, we are flexible and deliver customized products.
Maintenance should be planned, as optimizing mature roll covers is an important aspect of running your production plant with maximum efficiency. Voith has been a competent, trusted and reliable industry partner for 150 years. Furthermore, we provide roll servicing with comprehensive maintenance and inspection steps combined with different upgrade solutions you can completely rely on.