The cutting mechanism is composed of an eccentric mechanism and the knife holder at one end of the straight thread path to complete the cutting action. The electric mechanism is composed of a main shaft, a sliding block, an eccentric wheel, a rocker arm, and a punch. Its power is driven by a cutting motor to rotate the main shaft through a V-belt drive. The punch reciprocates up and down under the action of the eccentric mechanism. When working, when the metal wire in the straight wire groove reaches a fixed length, the metal wire quickly pushes the straight wire groove forward under the action of the friction force of the pressing wheel group, and the boss at the back of the punch press block on the top of the cutter head Move to the working stroke of the punch, at this time, the punch press block impacts the cutter head, thereby cutting the metal wire to a fixed length.

At the same time, when the punch block descends, the groove sealing and twisting iron is pressed under it, so that the sealing rod rotates around the guide rod, and the cut wire in the groove is released, and it automatically falls into the wire bucket under the action of gravity. When the head moves upward, the cutter head moves upward, and under the action of the torsion spring, the wire sealing rod re-seals the wire groove. After the wire rod thrust disappears, the straight wire groove returns to the initial state under the action of the tension spring, and enters the next cycle.