For the slabs of marking ,ingots and coils some mills using electric arc spraying 130 In LD/U-2EM . The plant( compact and trailerable) can be used both manually and with robot port .A transformer current continues to a gun body to whose end the electric arc which melts the wires Aluminium, Zinc, inox, copper etc. while a jet of compressed air to 5,5 bars projecting the atomized metal on the support to be marked.
The hourly capacity is :
| spraying capacity | 13 kg/h Zn | 4 kg/h Al | 3-4 kg/h Cr | 4-5 kg/h Al/Bz9Mn |
| Coverage in m² 100 to / h | 11 | 8 | 6 | 9 |
Acting on the potentiometer ,the current can vary from 25 Amp a 130 Amp . The generator is internally ventilated to provide broad protection against short circuits caused by dust. The gun is equipped with a system of nozzles "closed", to reduce the spraying cone.
The resulting characters , They may vary in size depending on customer needs. The spraying is rapid and at low cost is performed that are or consisting of: cost of metal marking, compressed air equal to 900 l / minute and energy 4 kVA .
The spraying electric arc also ensures :
high visibility of the marking at a distance in handling with cranes
duration : greater than 6/ 8 months in case of outdoor storage
simplicity of operation
ease of maintenance of the spraying.