Pneumatics & Hydraulics

Innovative air shield keeps lenses clean

April 2007 Pneumatics & Hydraulics

Automotive glass is tempered by subjecting it to a series of heating and quenching operations. To maintain a uniform glass temperature an infrared scanner monitors temperature across the glass surface and sends signals to a PLC, which automatically adjusts conveyor speeds and oven temperatures. Control problems occurred when dust and other airborne particulate coated the sapphire lens of the scanner and caused it to generate false temperature readings. The result was hundreds of metres of rejected glass.

A Model 110006 152 mm Exair super air knife was mounted on one side of the lens, directing a boundary layer of air in front of it. The sheet of air created an invisible barrier that kept contaminants off the surface. Process time was reduced and the waste was eliminated.

The ability to screen the lens without a wiper or other obstruction was the key to success in this application. The uniform airflow produced by the super air knife makes it an ideal way to separate one environment from another. This same arrangement has been used to keep lasers and other lenses clear of smoke and debris. Similar applications include trapping fumes in an open container, retaining heat in an oven or deflecting mist from a machine tool.

For more information contact Rodney Bradley, ETEST, +27 (0)31 702 8302,,


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

BMG’s Hydraforce valves and solutions
April 2021, Bearing Man Group t/a BMG , Pneumatics & Hydraulics
BMG, distributors of the Hydraforce range of proportional valves in southern Africa, works closely with Hydraforce engineers and customers in diverse industries to design and manufacture customised hydraulic ...

Highly flexible pick and place with digitised pneumatics from Festo
February 2021, Festo South Africa , Pneumatics & Hydraulics
Motion Apps are revolutionising pneumatics by increasing flexibility, energy efficiency and accelerating production processes.

An easier way to connect
February 2021, Hydrasales , Pneumatics & Hydraulics
Quick-release hydraulic couplings on agricultural equipment have enabled Faster Couplings to provide innovative solutions to meet this sector’s needs.

Protect machines with soft-start valves
February 2021, SMC Corporation South Africa , Pneumatics & Hydraulics
A slow increase in air pressure into a machine at startup helps facilitate a soft start of all downstream components.

Gimatic expands product range with launch of vacuum product offering
January 2021 , Pneumatics & Hydraulics
New offering gives customers greater flexibility in designing optimal automation systems that aim to increase efficiency & productivity.

Fibertex offers advanced solutions in filtration for a cleaner environment
November 2020 , Pneumatics & Hydraulics
Fibertex Nonwovens, a leading manufacturer of a comprehensive range of nonwovens and performance-based materials used in diverse industries, has developed advanced filtration solutions that contribute to a cleaner environment.

Monitoring oil with the power of connectivity
November 2020, Hydrasales , Pneumatics & Hydraulics
The latest innovation in the MP Filtri range of condition monitoring products helps system engineers with the digitalisation of their monitoring processes. It identifies contaminants early in the service ...

Parker launches the icount LaserCM30
November 2020, Parker Hannifin - Sales Company South Africa , Pneumatics & Hydraulics
Next generation particle contamination monitor with test procedure in less than 90 seconds.

SMC’s energy efficient vacuum solutions
October 2020, SMC Corporation South Africa , Pneumatics & Hydraulics
SMC has placed great emphasis on the design of its vacuum range and helps its customers select the best vacuum system for their application.

Rethinking pneumatic technology for the factories of the future
September 2020, Parker Hannifin - Sales Company South Africa , Pneumatics & Hydraulics
Does a technology such as pneumatics have a central role to play in the flexible, smart production lines of the factories of the future?