AIRFLOW CONTROL APPARATUS AND METHOD FOR MANUFACTURING STRETCHED FILM

The present invention provides an airflow control apparatus (1) of a box-shaped body (6) installed adjacent to an upstream side of an entrance (4) and/or a downstream side of an exit (5) of a tenter oven (3). Air blowing nozzles (N1, N2, N3, N4) facing each other across a film are installed in the airflow control apparatus (1). Air is blown toward the film from the air blowing nozzles, and the flows of air into the tenter oven (3) and out of the tenter oven (3) are blocked. Additionally, excess air blown from the air blowing nozzles is exhausted by exhaust mechanisms (8a, 8b, 8c, 8d) installed on the upstream side and the downstream side of the air blowing nozzles. The present invention provides the airflow control apparatus (1) that suppresses the inflow of air to the tenter oven (3) from the outside of a chamber and suppresses the outflow of air to the outside of the chamber from the tenter oven (3). (Figure 1.)