Spraying Production Machine for Different Size LPG Cylinder
Product Description
1. Powder coating line design
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2. Process flow diagram
This line consists of powder coating chamber, booth, curing bake, suspend conveyor and electric control system.
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3. Curing bake
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The drying tunnel consists of three parts: drying tunnel. Heating system and exhaust system.
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2.heating system: consists of heating chamber, burner, heated air recycling fan, return airway and temperature control system.
(1)heating room:Â an access door is on the side of the heating chamber for future repairing.
| No | Name | Details |
| 1 | Workpiece | Gas cylinder |
| 2 | Workpiece material | Metal |
| 3 | Max. workpiece size | Φ300×H570(mm) |
| 4 | Workpiece weight | ≤30kg |
| 5 | Braced chain | QXT250/50Kg light common chain |
| 6 | Machine capacity | 2000pcs/12hours |
| 7 | Hanging type | One cylinder every two pitch, that means one cylinder per 500mm. |
| 8 | Linear speed | 2000pcs÷12h÷60min×0.5m/hang=1.4m/min |
| 9 | Heating source | Nature gas(LPG) |
| 10 | Location area | See layout drawing, beam bottom height 8.5Â meters |
2. Process flow diagram
This line consists of powder coating chamber, booth, curing bake, suspend conveyor and electric control system.
| No | Name | Transit time | Working temperature | Operation |
| 1 | Loading | Â | RT | Manual |
| 2 | Powder coating | Â | RT | Auto+manual |
| 3 | baking | 17-18min | 180-190ºC | Heated air circle |
| 4 | cooling | 20min | Â | Â |
| 5 | unloading | Â | Â | Manual |
3. Curing bake
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The drying tunnel consists of three parts: drying tunnel. Heating system and exhaust system.
- Drying tunnel
| No | Name | Technical parameter |
| 1 | Overall structure | Bridge type |
| 2 | No of tunnels | 4 |
| 3 | Size of the inner tunnel | L14×W3.2×H2.1(m). Leg height 2.5meters |
| 4 | Thickness of the insulation | 150mm |
| 5 | Material of the insulation | High quality rock wool board |
| 6 | Unit weight of the insulation | 100Kg/m3 |
| 7 | Material of the inner plate | δ0.8 galvanized steel sheet |
| 8 | Metarial of the outer plate | δ0.8 color sheet |
| 9 | Structure of inner and outer plate | Assembly structure |
| 10 | Material of the inner angle plate | δ1 galvanized steel sheet |
| 11 | Material of the outer angle plate | δ3 hot-rolled sheet with paint |
| 12 | Supporter material of the tunnel | δ3 carbon steel sheet, edgefold with paint |
| 13 | Outer temperature of the tunnel | Lower than environment temperature 15ºC |
| 14 | Inner temperature of the tunnel | 180ºC |
| 15 | Drain cracking-off | Top of the tunnel |
2.heating system: consists of heating chamber, burner, heated air recycling fan, return airway and temperature control system.
(1)heating room:Â an access door is on the side of the heating chamber for future repairing.
| No | Name | Technical parameter |
| 1 | Position and number of heating room | Bottom of the bake tunnel, 1Â set |
| 2 | Heating room configuration | 300000 calories, 1Â set |
| 3 | Inner plate of the heating room | Galvanized steel, δ1 |
| 4 | Outer plate of the heating room | Cold-roll steel sheet, δ1.5 |
| 5 | Thickness of the insulation | 150mm |
| 6 | Material of the insulation | High quality rock wool board |
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