| 摘要 |
A casting drum is rotated around a shaft. A peripheral surface of the casting drum moves in an X direction. A dope is discharged through a casting die onto the peripheral surface such that a casting bead is formed so as to extend from a discharge port of the casting die to the peripheral surface. A decompression chamber decompresses an upstream side from the casting bead in a moving direction of the casting drum. The decompression chamber is provided with a sensor unit for detecting a width of the casting bead in a Y direction as width data. A control section shifts outer side seal plates in the Y direction based on the width data detected by the sensor unit such that the outer side seal plates are located in an upstream side from side ends of the casting bead in the X direction. Upon formation of a casting bead having a new width, the control section shifts the outer side seal plates in the Y direction based on the width data of the casting bead having the new width such that the outer side seal plates are located in the upstream side from the side ends of the casting bead having the new width in the X direction.
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