MARK FORMING DEVICE FOR MOLD FOR MOLDING

PROBLEM TO BE SOLVED: To provide a mark forming device capable of confirming a display of a mark engraved on a molding from an outside of a mold for molding and easily changing the display in a short time and to provide the mark forming device capable of easily dealing with a thickness of a material of the mold even by altering the thickness. SOLUTION: In the mark forming device 10, a sleeve leading end 21 having a first mark and a pin leading end 20 having a second mark are opposed to a cavity of the mold for molding. Meanwhile, a pin rear end 26 and a sleeve rear end 25 are rotatably provided on the other surface exposed with the outside of the mold. The lead end 21 and the rear end 25 are coupled by a cylindrical sleeve coupling part 23. Similarly, the leading end 20 and the rear end 26 are coupled by a cylindrical pin coupling part 24. The end 25 and the end 26 are rotated to alter positions of the first mark and the second mark.