Internal Bubble — Cooling

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.

As this air touches the hot plastic (molten polymer), it absorbs heat. INTERNAL BUBBLE COOLING

A dedicated exhaust pipe, usually located in the middle of the die, pulls the warm air out.

is a specialized air-management technology used in blown film extrusion to increase production speed and film quality. By constantly exchanging the air inside the inflated plastic "bubble," IBC systems remove heat from the internal surface, allowing the plastic to solidify faster than with external cooling alone. How IBC Works Fresh, often chilled air is blown into the

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:

Numerical Study of Internal Bubble Cooling (IBC) in Film Blowing As this air touches the hot plastic (molten

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