The present utility model relates to a rotary cutting device for excess material at large bottle mouths of an extrusion blow molding machine, comprising a tool rest. The tool rest consists of a main shaft, a motor, a motor base, a rotating arm, a cutter shaft and a circular blade. The cutter shaft and the main shaft are respectively connected to two sides of the rotating arm and are parallel to each other. The main shaft is driven to rotate by a gear motor and drives the cutter shaft to make a circular motion around the main shaft through the rotating arm. The cutter shaft is equipped with a floating circular blade which can rotate freely and float up and down by 2–3 mm. The present utility model has the following advantages: since the circular cutter can rotate freely, the rotary cutting process is rolling press cutting without generating chips; the entire peripheral edge of the circular cutter is used for rolling cutting, and the blade is hardly worn compared with fixed cutter cutting, making the cutter more durable; a floating spring is arranged on the main shaft of the circular cutter, allowing up‑and‑down floating. For bottle mouths slightly deformed during blow molding, the blade can automatically track and cut accurately due to the groove design of the air bag.
Country Code: CN
Application Number: CN201120481740.3
