air-ring

air-ring

In the placement of shotcrete, a perforated manifold through which air is introduced into the flow of material.
Mentioned in ?
References in periodicals archive ?
The Intensive Cooling air rings also include all the secondary air-collar locking points of the original air-ring design, says Addex.
The BFC Series promises an increase in blown-film productivity, especially in warmer climates or environments where ambient air temperatures rise during the summer, by eliminating production variables in air-ring supply, including air temperature, pressure, and volume, the company says.
The cooling air from the air-ring is one of the key factors to stabilize or destabilize the bubble in the film-blowing process.
In blown film, the air-ring components of both conventional and IBC systems are expensively designed to cool the bubble uniformly around its circumference.
It is shown that cooling efficiency is critically sensitive to the air-ring design as minor modifications cause large variations in cooling performance.
In these trials, it has reportedly been shown to increase output by 40-60% over what can be generated from lines equipped with just conventional air-ring technology.
The new design of the WesJet AutoPro blown film air ring reportedly improves air-ring control, gauge tolerance, and yield.
Called the Optifil P-MDO, the device is designed to work with W&H's Optifil P auto-gauging systems (either die or air-ring based).
An Auto-Profile Converter Module (ACM) replaces the existing automatic air-ring junction box and provides local control over the air ring/pancakes, including the control algorithm itself.
The line also featured the Arctis high-performance, dual-lip air-ring system, an upgrade of W&H's Opticool air ring that is said to boost output by 5-10%.
On blown film systems, drooling from a die with an external air ring is not a big deal as long as someone occasionally removes the resultant "chimney" of polymer before it encases an air-inlet diverter or the air-ring lips.