| 摘要 |
PURPOSE:To prevent the leakage of a coating material from a coating die in the restarting stage of coating in the case of coating the coating material on core wire electrodes of coated electrodes by detecting the position of the preceding end of the core wire when the coating is interrupted and controlling the coating in such a way that the core wire stops in the prescribed position. CONSTITUTION:Many core wires 2 for coated electrodes which are cut to a specified length are put into a hopper 1, and are fed by each piece through a delivery port 9 by the rotation of a bevel roll 8 through a roll 11, a guiding cylinder 13 and an inlet pipe 19 into a coater 14 for coating a flux, where the core wires are coated with a flux 16 pressurized by a hydraulic mechanism 18 on the circumference thereof and are discharged through a coating die 21. When there is no more flux 16 in the coater 14, the absence thereof is detected with a control circuit 25 and the feeding of the core wires 2 is stopped; at the same time, the preceding end position where the final core wire 2 projects from the die 21 is detected with two sets of sensors P1T, P1R and P0T, P0R, and is so adjusted as to be located in the position of correct beta, whereby the leakage of the flux 16 from the die or backflow thereof into the inlet pipe 19 is prevented in the restarting stage of the coating work by replenishing the flux 16. |
