Advanced Actuator Control Systems

VIB SmoothTech Description
The most important properties of a good steam applicator are its capability and its ability to raise sheet temperature and moisture in the treated surface. These two properties will improve the sheet's cross-directional smoothness and gloss profile and optimize the two-sideness. With the VIB SmoothTech in the calender, managing smoothness and gloss level and two-sideness is achievable.

The compromise between quality increases and profiling capability has been eliminated by increasing the velocity of the steam jets onto the web.

The VIB SmoothTech has two cross directional headers to make the profiler absolutely drip free. The first steam drying header collects all condensate which might come from the steam supply and assures that only dry steam reaches the second profiling header. The profiling zone is fully compartmentalized, supplying high velocity steam to each cross direction compartment via a separate, uniquely designed actuation valve that allows optimum zone definition and precise control. The spring loaded profile valves assure immediate steam shut-off at sheetbreak. The VIB SmoothTech heating system assures that the steam shower is always hot and immediately ready for steam application.

Special steam heating system of diffuser plate assures complete heating even during longer sheetbreaks.

Primary material for VIB SmoothTech is stainless steel 1.4571 (316 Ti).

Control Station ^ECS is an electronic control station that manages the control of the pneumatic actuators. Each actuator is controlled with an I/P-converter with a control signal from 0.4 - 2 bar (6 - 30 psi). Setpoints are sent from the VIB control stationIPS using measurement system data.

Control Station ^IPS is an integrated process station that serves as the central process point for the system. It contains the integrated MD/CD control, the operator visualization package, PLC functions and the intelligence to manage the total actuator control system.

Benefits to the Paper Industry

• Increased smoothness and gloss for new grades and approved ones.
• Flatter smoothness and gloss profiles and caliper profile can be achieved simultaneously.
  
• Control of two-sideness by using VIB SmoothTech on top and bottom side.
  
• Narrow spacing of the actuator can be defined based on the desired profiling effect.
  
• Optional feedback of the actuator position ensures reliable functioning of the VIB SmoothTech Actuator.
  
• Provides better edge performance for improved reel building.
  
• Smoothness and gloss increase from 15 - 30 %.
  
• With new multinip calender smoothness and gloss increase from 25 - 50 %.
  
• Improved reel building through better caliper profile.
  
• CD gloss 2-sigma improvement of 50 %.
  
• Efficiency increase of total production line with integrated gloss control of 1 - 2 %.
  
  

Technical Features Two steam headers in cross direction. Steam heating system. Diffuser plate heating. Integrated CD and MD control including PLC functionalities (interlocks, loops). Profiling zone spacing down to 75 mm means high profiling capability. Rigid construction, material 316 Ti. LAN or Serial Link protocol for connection to the measurement system. Switchable with a mouse click.	Technical Specifications Pneumatic Actuator Body material 1.4404 Control signal 0.4 - 2 bar (6 - 30 psi) Position indicator Closed when no control signal Stainless Steel Primary 1.4571 (316 Ti)
Options Vapor extraction hood Steam supply engineering PosiTrak position feedback Turnkey installation	PSF® - Precision Steam Finishing VIB SmoothTech Soft and Multinip Calender Steamshower VIB GlossTech Super Calender Steamshower for SC and LWC VIB MoistureTech On-line Moisture Application VIB CurlTech On-line Curl Control