Internal Bubble — Cooling

A complete IBC "piece" or system typically includes several integrated parts:

Fresh, often chilled air is blown into the center of the die to inflate the bubble.

The numerical results suggest that Internal Bubble Cooling (IBC) equipment introduces distinctive design and operation challenges. ResearchGate Digital Internal Bubble Cooling - Addex Inc. INTERNAL BUBBLE COOLING

Modern systems, like those from Addex Inc. or TSM Control Systems , use ultrasonic sensors to monitor the bubble's diameter. These sensors trigger automated blowers or valves to maintain a perfectly stable size. Core Components

As this air touches the hot plastic (molten polymer), it absorbs heat. A complete IBC "piece" or system typically includes

Numerical Study of Internal Bubble Cooling (IBC) in Film Blowing

A dedicated exhaust pipe, usually located in the middle of the die, pulls the warm air out. Modern systems, like those from Addex Inc

In a standard blown film process, molten plastic is extruded through a circular die to form a tube, which is then inflated into a bubble. IBC systems add a sophisticated air-exchange loop inside this tube: