Film blowing die with post-cooling device

摘要

For the production of blown polymer films, film blowing dies in which a rotating post-cooling device is arranged above the parison-forming zone are known. To improve the post-cooling and for simultaneous calibration, the post-cooling device comprises a parison ring (10) with blow-holes (6), which are directed at the parison (9). The parison ring is connected to an air supply.