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NEW! VENTO – AUTOMATIC GAUGE CONTROL

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VENTO is the new automatic film cooling and thickness control system by DOTECO.

The air ring, specifically designed to minimize friction and pressure drops, allows energy consumption optimization and high performance in terms of 2Sigma reduction and thickness uniformity.

Dedicated air flows ensure maximum cooling efficiency and bubble stability.

Suitable for low and high stalk bubbles, it can be easily installed on pre-exhisting lines.

VENTO is also available without automatic thickness control (VENTO ST), ideal for processes where only cooling of the film is required.

MORE INFORMATION
  • VENTO Sito 3
  • VENTO Sito 2
  • VENTO Sito

ADVANTAGES

VENTO SQUARE WEB no BG

VENTO

THE AUTOMATIC AIR RING

 

  • High performance triple-flow automatic air ring.
  • Single air inlet, no air distributor needed. Easy to install, saves space and costs.
  • The design combined with single air inlet reduces drastically air pressure drops and turbulences, providing a homogeneous cooling.
  • The air for profile corrections is automatically managed by servomotor controlled valves equipped with encoders, which don’t require any calibration or reset. High responsiveness for improved output quality.
PROTUNE SCREEN WEB

PROTUNE

CONTROL SOFTWARE

 

PROTUNE, the gauge control software has been completely redesigned for a better user experience.

  • Intuitive and easy-to-use user interface.
  • Developed in HTML 5.0.
  • Remote technical support included.
  • Notification and alarm system.
  • Three different types of graphs to choose from for viewing profiles
  • Customizable data history and advanced reporting system.

PROTUNE is compatible with WBox user interface, please click here to learn more about its performance and configuration options.

DOTECO - K-500 Rotomat KT REV

ONLINE THICKNESS SENSOR

K ROTOMAT SERIES

 

  • The capacitive sensor, on slewing ring, goes around the bubble and measures the film thickness along the circumference, over the frost line.
  • The system calculates the thickness average value and the thickness actual values on each radial position (corresponding to the control zones of the automatic air rings).
  • Different sizes of slewing rings available for lay-flats from 255 mm up to 3900 mm.
  • Sensors with different coatings available: CRS (chrome coated sensor for standard films, excellent durability with abrasive films), PVD-2 (plasma coated sensor for slightly sticky films, good durability with light abrasive films), PTFE (coated sensor for sticky films, short lifetime with abrasive films).
  • On demand, PROTUNE can be interfaced with any other sensor available in the market.
VENTO PRESSURE WEB 2
CHAMBER’S SHAPE

Increased cooling uniformity AND bubble stability

 

Thanks to the ring’s helix-shaped chamber and the single air inlet:

  • The air pressure near the bubble is homogeneuous.
  • The flow is more stable and less turbolent.
VENTO section web
INNER TECHNICAL FEATURES

Less heating and pressure required

 

Broad chamber to minimize pressure drops and heating caused by friction.
The low-friction screen, channells and distribute homogeneously the air flow directed to the bubble.

ADVANTAGES

PROTUNE SCREENSHOT 1

Quick and accurate corrections

 

  • The use of valves controlled by servomotors ensures rapid and precise variations in the localized air flow, significantly reducing the time required to correct the thickness.
  • The motors equipped with encoders don’t require any periodic calibration or reset.
kunding web

Faster at start-up

 

  • At the start of the line, it is possible to increase the speed with which the measurements are made, reducing the 2Sigma more quickly and consequently reducing waste of material.
  • Then it  slows down for more precise measurements and fine corrections of the thickness.

HOW DOES IT WORK?

1) The gauge sensor detects the thickness of the film along the circumference of the bubble.

 

2) The measurements are sent to the supervisor to compare them with the reference thickness set by the operator.

 

3) The instructions relating to the necessary corrections are sent to the servomotors placed on the ring.
The motors, operated by the supervisor, control the valves to regulate the intensity of the flow, which will convey the right amount of air to correct the thickness:

  • If the sensor detects a thicker section than the intended value, the localized air flow in line with the area in question is reduced; the warmer film is “stretched” more, with a consequent reduction in thickness.
  • If a thinner section than the intended value is detected, the localized air flow in line with the area in question is increased; the colder film is “stretched” less, with a consequent increase in thickness.

 

This corrective process is repeated cyclically to reduce variability and make the film thickness as even as possible and close to the value set by the operator.

NUMBER OF LAYERS: 5

DIE DIAMETER: 400 mm.

EQUIPPED WITH CHILLER: YES

AVERAGE FAN TEMPERATURE: 15°C

NUMBER OF LAYERS: 3

DIE DIAMETER: 400 mm.

EQUIPPED WITH CHILLER: NO

AVERAGE FAN TEMPERATURE: 35°C

NUMBER OF LAYERS: 3

DIE DIAMETER: 400 mm.

EQUIPPED WITH CHILLER: NO

AVERAGE FAN TEMPERATURE: 35°C

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