Polylactic acid fiber composite filter tip rod forming machine

The utility model relates to a polylactic acid fiber composite filter tip rod forming machine, in particular to special equipment for machining and manufacturing filter rods through different types of tows at the same time, and belongs to the manufacturing field of filter tip rods for cigarettes. According to an opening forming portion, a second tow opening device is arranged above a first tow opening device in an original AF2 filter tip rod forming machine, the second tow opening device is connected with an AF2 filter tip rod forming machine motor and can control rotating speed automatically, the second tow opening device is composed of prestretching rollers and threaded opening rollers, tow raw materials are opened through the prestretching rollers and the threaded opening rollers in the second tow opening device, and the opened tow raw materials are conveyed to the first tow opening device in the AF2 filter tip rod forming machine through a conveying roller and are conveyed into a horn-shaped mouth and mixed together. The prestretching rollers are a set of rollers, the upper rollers are metal rollers, each lower roller is formed by wrapping polyurethane materials on a metal roller core, tows spread through first-level airflow and second-level airflow are clamped through the prestretching rollers, and the tows run stably and then enter the threaded opening rollers.