Internal | Bubble Cooling
Numerical Study of Internal Bubble Cooling (IBC) in Film Blowing
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:
Fresh, often chilled air is blown into the center of the die to inflate the bubble.
A dedicated exhaust pipe, usually located in the middle of the die, pulls the warm air out.
