Patent ID: 7887725
Filing Date: 2011-02-15
Classification: B29C,B29K

Abstract:
1. A casting method comprising the steps of: discharging a dope through a casting die onto a support moving continuously to form a casting film; sucking air of an upstream area from a casting bead in a moving direction of said support to decompress said upstream area by a decompression chamber, said decompression chamber covering said support in an upstream side from said casting bead in the moving direction of said support, said casting bead being said casting dope extending from said casting die to said support; and shifting at least one of partition members disposed in said decompression chamber, each of said partition members extending in the moving direction of said support; wherein at least one of said partition members is shifted in the width direction of said casting bead; wherein said partition members include a first side seal plate movable in the width direction of said casting bead and disposed in the upstream side from a side end of said casting bead in the moving direction of said support, and said first side seal plate is shifted in accordance with a position of said side end of said casting bead; and wherein a side air shielding unit blocks a clearance between said first side seal plate and a side board of said decompression chamber, and said side air shielding unit is disposed in the periphery of said support and has a width changeable in conjunction with change in a position of said first side seal plate.