Apparatus for manufacturing metal thin strip

A single roll apparatus for manufacturing a metal thin strip by injecting a molten metal onto an outer peripheral face of a cooling roll rotating at a high speed and rapidly solidifying it to manufacture a metal thin strip,

• wherein an airflow blocking device for blocking the airflow along the surface of the cooling roll is provided at an upstream side of a molten metal injection nozzle for injecting the molten metal in a rotation direction of the cooling roll,
• a carbon dioxide gas injection nozzle for forming a flow of carbon dioxide gas on an outer peripheral surface of the cooling roll between the airflow blocking device and the molten metal injection nozzle or forming a carbon dioxide atmosphere on the surface of the cooling roll between the airflow blocking device and the molten metal injection nozzle is disposed,
• a foreign material removal device for removing foreign material attached to the surface of the cooling roll is disposed within a range of 600 mm at an upstream side in the rotation direction of the cooling roll with respect to the airflow blocking device, the foreign material removal device contacting with the surface of the cooling roll for removing foreign material, and
• the foreign material removal device is a gas injection device injecting a gas onto the surface of the cooling roll.