UNDERWATER CUTTING PELLETIZER, KNIFE USED FOR THE SAME PELLETIZER, AND UNDERWATER CUTTING PELLETIZATION METHOD USING THE SAME KNIFE

摘要

In a knife used in an underwater cutting granulating device for cutting and granulating a fused resin extruded from a die to a water chamber by a cutter rotated in the state where the knife is opposed to the die, the knife of the cutter has a mountain-shaped guide surface for guiding a water flow in the direction of drawing it toward the die, which is formed on the surface opposite to the surface facing the die. In this knife, more specifically, the transition angle B DEG from the front surface to the back surface and the transition angle D DEG from the back surface to the rear surface are set so as to be 150 DEG