Molded line twisting mechanism

The utility model discloses a molded line twisting mechanism which comprises a lead guide wheel frame and a doubling mold and further comprises a plurality of pre-molding devices and a mounting frame. The plurality of pre-molding devices are fixed on a mounting plate; each pre-molding device comprises a guide wheel, a plurality of flatting wheels and the mounting plate; the guide wheel and the flatting wheels are fixed on the mounting plate, and the mounting plate is fixed on the mounting frame; a molded surface groove is arranged on a peripheral surface of the guide wheel; and the plurality of flatting wheels cling to the guide wheel. The pre-molding devices of the molded line twisting mechanism have the characteristics of simple structure, small volume, lightness and convenience and lead the pre-twisting and orienting effects of molded lines to be better, therefore, a single molded line does not turn over during twisting, and the orientation of the line twisting is exact and rounding.