PURPOSE:To prevent dislocatin between pattern forming parts and molding parts, and improve alignment accuracy by aligning the split patterns provided in a mold with the split patterns provided in a transfer film to form successive patterns. CONSTITUTION:Split patterns 4a are provided on the parting surface 3 of a mold 1. A decorated film 5 is of a continuous base material 6 which is provided with pattern forming parts 7 every predetermined distance, and when each position corresponds with each position in the molding parts 2 of the mold 1, split patterns 4b which pair with split patterns 4a are provided in the position wherein a successive pattern is formed with the split patterns 4b provided in the mold 1. When the decorated film 5 is moved between the mold 1 and a mold 8 paired therewith and the molding parts 2 and the pattern molding part 7 correspond to each other, injection molding is performed in clamping the molds. Since the alignment is carried out in order that the split patterns 4a of the mold 1 which can see through from the surface side of the decorated film 5 and the split patterns 4b on the decorated film 5 become a successive pattern, transparent or translucent synthetic resin or the like is used as the base material 6 of the decorated film 5.
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