FINGER JOINT CUTTER DESIGNED FOR GOOD CUTTING PRECISION BY SUPPRESSING BLOW OUT OR LIP OUT

摘要

Disclosed is a finger joint cutter designed to exhibit good cutting precision by suppressing occurrence of blow out or lip out. The finger joint cutter (40) comprises a plurality of blade array groups (44a, 44b, 44c, 44d) made of a plurality of cutting blades (14) aligned at a predetermined pitch along a rotary shaft, the cutting blades (14) of each blade array group (44a, 44b, 44c, 44d) in rotation cutting into an end portion of a material. The cutting blades are either a main blade (46) shaving a valley portion and a slope portion of the joint fingers or an auxiliary blade (48) shaving in proximity to the valley portion of the joint fingers . The face of the main blade (46) is tapered to become thinner toward the outer diameter side. The width dimension on the face of the auxiliary blade (48) in the direction of the axis of rotation is set smaller than the width dimension on the face of the main blade (46) in the direction of the axis of rotation.