Addex Inc. officials said the company's Digital Internal Bubble Cooling (DIBC) system delivers the fastest reaction time in the industry, ensuring precise bubble control and helping blown film makers do faster changeovers and significantly reduce scrap.
Addex President Rick von Kraus called DIBC “one of the most sophisticated bubble cooling systems on the market.”
“At a time when resin prices are high and scrap reduction is a major concern, the DIBC represents a major advancement that helps processors realize major raw material savings,” von Kraus said.
The five-sensor system features a high-speed, servo-controlled air regulation valve that performs split-second corrections in bubble size, up to 20 adjustments per second.
Patented split sensors enable the airflow intake and exhaust to react to the slightest changes in bubble size, at or below the frost line where the bubble size is not yet final. A set of two non-contact ultrasonic sensors are aimed at the bubble below the frost line, where the size changes, especially with low melt-strength resins like metallocenes and linear low density polyethylenes. That allows an immediate correction by the intake/exhaust blowers via the blowers. For more critical layflasts, this is done with the high-speed servo-reaction control valve.
A second set of two ultrasonic sensors are aimed at the bubble above the frost line, where bubble size is stable, to calibrate the lower sensors to ensure the size is kept constant. A fifth ultrasonic sensor is aimed at a fixed target to calibrate the other four sensors, whose readings can be altered due to changes in air temperature.
Addex, based in Stoughton, Mass., said processors have switched from a 40-inch layflat to a 60-inch layflat in seconds instead of minutes it took with the prior system. Addexx said one film processor reduced annual waste by about 60,000 pounds of material.
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