The forming roll (2) has roll-side engaging means (4) on the side where the rotating force transmitting means (1) extends toward the forming roll (2).

Provided is a roll forming device, which is equipped with a forming roll capable of manufacturing such a mechanism simply and precisely as to input a rotating drive force to the forming roll.

The roll-side engaging means (4) and the input-side engaging means (3) are engaged to input the rotating drive force from the rotating force transmitting means (1) to the forming roll (2).

A model-based strategy is provided for determining casting roll operating temperature in a continuous thin strip casting process.

The roll forming device inputs the rotating drive force to the forming roll (2) from rotating force transmitting means (1).

The rotating force transmitting means (1) has input-side engaging means (3) on the side where it extends toward the forming roll (2).

A high Cr casting iron or steel roller is applicable to a mill for rolling welded pipe.

A control strategy is also provided to modify one or more operating parameters of the continuous thin strip casting process as a function of the casting roll temperature.

In this process, the melts are extruded so that the thermoplastic resin (B) is coated with the thermoplastic resin (A) and the extrudate is cast on the casting roll to form a nonstretched film.