Pulling-up-type continuous casting apparatus and pulling-up-type continuous casting method

A pulling-up continuous casting apparatus comprising:

• a holding furnace that holds molten metal;
• a shape defining member disposed above a molten-metal surface of the molten metal held in the holding furnace, the shape defining member being configured to define a cross-sectional shape of a cast-metal article to be cast as the molten metal passes through the shape defining member;
• an image pickup unit that takes an image of the molten metal that has passed through the shape defining member;
• an image analysis unit that detects a waving motion on the molten metal from the image and determines a solidification interface based on presence/absence of the waving motion;
• and
• a casting control unit that changes a casting condition only when the solidification interface determined by the image analysis unit is not within a predetermined reference range, wherein
• the casting control unit uses a reference range which differs according to a pulling-up angle of the molten metal and determines whether or not the solidification interface is within that reference range.