Zinc spray machine 500 model
Description
This kind of machine is mainly used for corrosion protection ,which covers a large area and is effective for long term ,of a variety of steel structures such as bridges ,sluice gates ,ships ,pipes ,iron towers ,lamp posts ,container ,etc.
Feature
By adopting stepless speed regulation ,the spray gun can be used to spray various metal wires with different melting point ,such as zinc wire ,aluminum wire , zinc aluminum alloy wire ,copper wire , lead-tin wire ,high carbon steel wire and stainless steel wire etc. Specification of Spray wire ranges from 1.0mm to 3.0mm diameter .
Technical Parameters
The complete set of equipment consists of a 250 high-speed arc spray gun and a 500 model arc spraying machine
Table 1 (Basic parameter)
| Item | Basic parameters |
1 | Weight of Spray Gun | 2.65kg |
2 | Operating pressure /Consumption of spray gun | ≥0.5Mpa/2.87m3/min |
3 | Wire-feeding pulling force of spray gun | ≥9.8kg |
4 | Wire-feeding speed of spray gun | Stepless spreed regulation |
5 | Weight of arc spraying machine | 185kg |
6 | Input power supply | 380V (three-phase)50Hz |
7 | Maximum output current | 500A |
8 | No-load output voltage | 18-44V |
9 | Arcing time factor | (500A)100% |
10 | Temperature | 85℃ |
11 | Characteristic | Flat characteristic |
Table2 Main technical parameters(for reference)
Spraying material | Wire diameter(mm) | Frequently-used working current(A) | No-load voltage(V) | Selected air cap(mm) | Maximum efficiency of spray painting(kg/h) |
Zinc wire | Φ2.0-φ3.0 | 120-210 | 20-30 | Φ7-φ8 | 18-35 |
Aluminum wire | Φ2.0-φ3.0 | 130-240 | 25-38 | Φ7-φ8 | 5.3-10 |
High carbon steel wire | Φ2.0 | 150-220 | 38-44 | φ8 | 4.3-5.8 |
Stainless steel wire | Φ2.0 | 150-220 | 38-44 | φ8 | 4.3-5.8 |
Copper wire | Φ2.0 | 150-220 | 32-40 | Φ7-φ8 | 3.5-6.3 |
Wire of Aluminum zinc and terne meter | Φ1.0-φ2.0 | 80-110 | 18-28 | Φ7 | - |
Schematic diagram of electric arc spraying
Principle :act as consumable electrodes ,two coated metal wires are fed at a constant speed and are melted by electric arc produced between ends of two metal wires . Subsequently ,melted metal wires are atomized into small-grained and evenly distributed particles and are sprayed onto workpieces’ surfaces by compressed are flow to form coatings , When operation of spray coating is performed ,two wires intersecting wire each other at an angle are (30℃-40℃ at usual conditions )are continuously fed and respectively connected wire power supply’s positive and nagative electrodes ,Arc is generated at the ends of metal wires ,Under the action of power supply ,stable combustion of arc is maintained ,Behind the point where the arc is generated , melted metal wires are atomized into fine particles and sprayed onto pre-treated substrate’s by high-speed compressed air flow so as to form coatings
