Manual And Automatic Powder Coating Line For Industrial Products

1, Basic parameters

1.1. Dimensions of the workpiece (mm * mm * mm): 2400x900x1400.

1.2 Spray time: 7 hours per day

1.3 Production site (m * m): 19.2x12.2.

1.4 Power Supply:

Three phase AC: 240V; Frequency: 60Hz;

2, Process flow and production capacity

1. Spray painting line: hanging up → spraying with clean water → drying (100-120 ℃) → spraying (automatic or manual spraying) → baking paint (adjustable at 180-220 ℃) → cooling → hanging down.

2. Conveyor chain speed: 0.5-0.8m/min.

Appendix 1

order

Process Name Processing Method Process Time (min) Process Parameters Remarks

1. Install and hang artificial room temperature components

2. Rinse and spray with clean water. 2. Spray pressure: 1.5~2.0bar

3 Drying electric heating 7 80-100 ℃

4 powder spraying manual 2-4 room temperature

9 Baking Natural 15 Temperature: 180-220 ℃ Baking temperature can be adjusted according to coating requirements

10 cooling 12 room temperature

14 hanging artificial room temperature

3, Equipment process description and structural design

1. Clean water spray cleaning room

The framework of the spray room is made of 80 × 80 galvanized carbon steel square tubes, and the wall panels of the tank are made of 0.9mm thick SUS304 stainless steel plates. The bottom plate of the room is made of 2.0mm thick SUS304 stainless steel plate.

The circulating water tank is made of 2mm thick SUS304 stainless steel plate, and the tank is equipped with SUS304 filter screen. The spray pump adopts a vertical PP centrifugal pump with a power of 1.5kw, a flow rate of 16m3/h, and a pressure of 2bar. The material of the spray pipe is hot-melt PPR

Appendix 2:

Clear water spray room -1 set

Process name: Cleaning

Processing method: Spray

Processing time (minutes) 2

External dimensions of the room (mm): 4000 × 2000 × 3600.

The wall panel is made of 0.9mm thick SUS304 stainless steel plate. Galvanized carbon steel square tube frame. The groove bottom plate is made of SUS304 stainless steel plate with a thickness of 2.0mm.

Dimensions of the circulating water tank (mm): 1220 × 610 × 650,

Plate material 2.0mm, SUS304 stainless steel plate, galvanized carbon steel square tube for the chassis

Spray pipe hot melt PPR pipe

Spray PP nozzle

Spray water pump vertical centrifugal water pump, power 1.5w, 16 m3/h, 1.5bar

2. Conveyor equipment

The conveying equipment mainly consists of electric drives, heavy hammer tensioning mechanisms, chains, rails, curved rails, telescopic rails, inspection rails, brackets, electrical control systems, overload automatic protection devices, etc. Adopting a 150 type heavy-duty suspension conveyor chain and a Y-shaped lifting device with a single point lifting capacity of 55Kg; Electric drive Vmax ≈ 0.5-1m/min, install 1 set of electric drive. The tensioning device is equipped with a displacement limit protection switch device to ensure smooth operation of the entire chain. Emergency stop switches are installed in the upper and lower workpiece areas, powder spraying areas, and high-temperature baking areas along the entire line, with mechanical and electrical dual safety protection installed for the driving system; The material of the chain track support frame is 100 × 100 carbon steel square tube.

Appendix 3:

Conveyor chain model 150 heavy-duty suspension chain, pitch 250mm, total length 72 meters.

The hanging load-bearing Y-shaped lifting device has a load capacity of 55kg per hanging, with an interval of 500mm.

The track adopts a C-shaped structure and 3.5mm steel plate. The total length is 72 meters.

Tension adjustment equipment spring type, 1 set.

Drive equipment track type, reduction ratio 1:100, motor power 1.5kw, constant speed, 1 set.

Chain speed design process: Chain speed is V=0.8m/min (frequency converter installed by customer)

3. Drying oven and baking oven

The drying oven and high-temperature baking oven adopt a straight through structure, and the bottom frame of the baking chamber is made of profiles, which are made of 80 × 80 galvanized steel square tubes with a thickness of 2.0mm. The insulation board for the drying oven chamber is made of 75mm rock wool sandwich panel, and the insulation board for the high-temperature drying oven chamber is made of 125mm rock wool sandwich panel. The inner and outer panels of the insulation board are 0.6mm thick color coated boards, and the middle layer is filled with 100K rock wool insulation material. The inner and outer panels are pressed together with the insulation material as a whole, and the temperature of the outer wall of the chamber is not higher than 10 ℃ above the ambient temperature.

4. Heating system

The heating device adopts 2602 (high-temperature pressure resistant ceramic pieces) natural gas infrared radiation direct heating method, and the natural gas infrared radiation heater is installed at the bottom of the baking furnace. The specification of each set of natural gas infrared radiation heater is 930 * 135 * 190 (mm), with a heating capacity of 10.3 (8.9) kw (kcal/h). Install 16 sets of drying ovens; Install 42 sets of high-temperature baking ovens.

The temperature control systems of the high-temperature baking oven and the drying oven are each equipped with one set of temperature control, and the temperature inside the baking oven (the system will automatically maintain a constant temperature at the set baking temperature).

The temperature inside the baking room is automatically controlled by a digital temperature controller for both heating and temperature control, and an alarm will be triggered when the temperature exceeds the limit. The temperature inside the drying oven and high-temperature baking oven is independently controlled.

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