PURPOSE: To enable to perform pattern formation and cutting at the same time, by a method wherein a back mold core metal is extended up to the outside of an extrusion port and a sealing roller having a cutter blade on the outer circumference is applied to the center of an extruded tile from both sides at a position where the back mold core metal is left remaining.

CONSTITUTION: The title device possesses a function where a tile 7 can be prevented from biasing to one side and the depth of a pattern can also be deepened a. the time of sealing by pressing a sealing roller 5 against the center of the tile 7 at a position where a back mold core metal 2 is left remaining. A geometrical pattern or a figurative pattern can be formed continuously by providing the sealing roller 5 with a cutting blade 3 or a semi-cutting blade 4. In addition, when the tile 7 is cut off by the cutting blade 3 rotating along with a pair of the sealing roller 5, a section becomes circular, therefore, only a part of, the tile is cut off with the semi-cutting blade 4 in the thick tile and the remaining part of the tile can be cut off with a cutter 6 which is in harmony with a rate of the sealing roller 5.