LPG Cylinder Spraying Production Line Coating Machine

The LPG Cylinder Spraying Production Line Coating Machine consists of manual soot blowing and dust removal system, automatic + manual electrostatic spray gun system, electrostatic powder spraying room and recovery system, curing drying room, hanging conveyor, and electronic control system.
LPG Cylinder Spraying Production Line Coating Machine
Production of powder spray+drying room
Automatic and manul electrostatic spray gun system
If electrostatic spray gun system,powder feeding system adopts advanced fluidized bed atomization to spray powder.

Electrostatic powder spraying room and recovery system:
1 sets of automatic electrostatic spraying powder and 1 sets of manual supplementary spraying are used in electrostatic powder spraying equipment, which consist of electrostatic powder spraying room, recovery device, automatic spray gun, electrostatic generator, powder feeder and manual electrostatic spray gun.
The indoor wind speed is controlled within 0.6~0.8m/s.
The powder recovery system adopts small cyclone + filter element recovery, the recovery effect is good, and the recovery efficiency is more than 95%.

Solidification and drying chamber:
The drying chamber is a double stroke bridge, and the two parts are combined into a combined drying chamber.
The drying chamber is composed of a heat preservation chamber body and a bracket,gas device,heating box,circulation fan and pipeline, and electric temperature control system, etc.
Drying method for hot air circulation, the bridge structure, using the principle of hot air rising, the main heating oven section overhead is higher than that of inlet and outlet, reduce the heat wastage

1.The circulating air duct system is reasonably arranged in the furnace body, and the circulating air quantity is designed according to the temperature difference requirement,and the temperature automatic control and display device is also provided. Galvanized steel sheet for pipeline
2.The chamber is composed of insulation board assembly structure, can minimize heat wastage,and eliminate thermal stress
3.The panel material is galvanized steel plate, and the outer wall is painted with color steel plate
4.The total thermal insulation layer of curing drying chamber is 100mm, and the end of drying chamber is equipped with maintenance door, so as to facilitate the maintenance of the equipment in the future
5.The heating system adopts the indirect heating method of gas.
6.The gas in the furnace is continuously heated by the external heat exchanger under the guidance of the high temperature fan, so that the temperature in the furnace rises or keeps constant temperature
7.In the circulating heating system engineering, a new air supply air outlet and exhaust gas pipeline are set up to keep the moisture content and exhaust gas content below the standard requirements, so as to ensure the drying quality of the products
8.The hot air circulation fan adopts the air cooling built-in type, the circulation fan adopts the special high temperature and low noise centrifugal fan, and the fan impeller, the main shaft and the bearing are all specially processed
9.The furnace temperature is controlled by PID digital display, automatic temperature control,and temperature alarm function
10.In order to prevent the exterior surface of the cracking fume pollution chamber generated during the powder curing process, the inlet and outlet of the drying chamber are closed to set the workpiece into and out the profiling door

Overhead chain conveyor:
The suspension conveyer includes driving device,tensioning device,chain,straight rail,bending rail with various angles,inspection rail,telescopic joint,lubricating device,various kinds of rack and hanger
The driving device adopts linear drive,and it is equipped with overload protection mechanism
The tensioning mechanism adopts the heavy hammer tensioning,and the load can be adjusted arbitrarily by the heavy hammer
The chain adopts universal bearing wheel chain
The conveyor is equipped with inspection track,temperature expansion joint and automatic lubrication device
The conveyor runs smoothly, reliably, without crawling and clamping,meeting the requirements of the smoothness of the conveying device when the powder is sprayed

Electronic control system:
The temperature control in the drying line of the production by digital display instrument
All low voltage components are either Schneider or Siemens to ensure their reliability and sensitivity
All motors are equipped with air switch,thermal relay protection system,which can effectively overload,short circuit,open circuit and other automatic protection
The design, manufacture and installation of electrical equipment are in line with the requirements of the relevant national standards
The electric control system includes: control cabinet, wire, cable, threading pipe

Dust blowing system:
The automatic dust blowing system uses compressed air to blow dust, and uses centrifugal fan to remove the dust outdoors:
Technology parameters:
1.System chamber measurement:25000×1600×2000mm
3.High voltage generator,power 220V,output voltage is 0~100 KV, and the maximum output current is 200A
4.Powder recycling mode is filter pulse recovery
5.Pressure of pneumatic actuator:0.6MPa
6.Maximum storage capacity of powder feeding barrel 60KG
7.Drying channel specification 13000×2300×2200mm
8.Temperature control range: 100-250C
9.Hanging conveying mode
10.Chain speed:1.0~2.0m/min (adjustable)

Indoor environmental requirements during spraying:
1.Normal temperature
2.Wind speed: 0.4 ~ 0.6m/s
3.llumination: >400Lx
4.Recovery rate of powder: >95%
5.Noise: less than 80db

System configuration:
Automatic powder spraying device 2 sets
Automatic spraying station 2 sets
Filter cartridge recovery system 2 sets
Heating chamber 1 set
Fuel furnace 1 set
Overhead chain conveyor 1 set
Electric control system 1 set

Integrated sieve feeding powder bucket 5 sets

Process parameters and flow chart of spray painting assembly line
1. Manual loading, working temperature at room temperature, manual processing
2. Powder spraying, working temperature at room temperature, working time for 2 minutes, 7 guns automatic+1 gun manual replenishment
3. Coating curing, working temperature 190-210C, working time 20 minutes
4. Natural cooling, working temperature at room temperature, working time of 20 minutes

5. Manual loading, working temperature at room temperature, manual processing

The factors that need to be considered before the spray painting process of steel cylinders are as follows: 1.Powder Hopper: The container where the powder coating material is stored before it is fed into the spray gun for application 

2.Powder Spray Gun: The handheld or automated device used to apply the charged powder particles onto the surface of the LPG cylinders 

3.High-Voltage Electrostatic Generator: The component of the powder coating machine that generates a high voltage electrostatic charge to the powder particles as they pass through the spray gun 

4.Fluidization: The process of turning the powder coating material into a fluid-like state by mixing it with compressed air in the powder hopper, allowing for smooth and consistent application 

5.Curing Oven: The oven or heating chamber where the coated LPG cylinders are placed to cure the powder coating, typically by heating them to a specific temperature for a set period of time 

6.Thermosetting Polymer Powder: The type of powder coating material commonly used in electrostatic powder coating machines, which undergoes a chemical reaction during curing to form a durable and heat-resistant coating 

7.Grounding: The process of ensuring that the LPG cylinders are properly grounded to complete the electrostatic circuit, allowing for efficient attraction of the charged powder particles to the surface 

8.Uniformity: Refers to the consistency and evenness of the powder coating application, ensuring that the coating thickness is uniform across the entire surface of the LPG cylinders 

9.Adhesion: The strength of the bond between the powder coating and the surface of the LPG cylinders, ensuring that the coating remains firmly attached even under mechanical stress or environmental conditions 

10.Defects: Any imperfections or irregularities in the powder coating, such as pinholes, orange peel, or uneven coverage, which may require corrective measures to achieve desired quality standards

Design description:
1. Maximum combined size of workpiece: diameter 400 mm * 1300 mm height
2. Suspension chain process speed: 2m/min
3. External dimensions of coating curing oven: L17 * W2.4 (3.2) * H2.5M, heat consumption 250000 kcal/hour
4. Automatic powder spraying equipment size: L5.6 * W1.8 * H3.1m, with 3 reciprocating machine automatic spray guns for one layer of flat cloth, 2 top spray fixed guns, 2 bottom spray fixed guns, and 1 manual supplementary spray
5. Powder recycling system: Mobile color changing filter single stage recycler, automatic powder recycling, powder supply bucket, vibrating screen
6. Suspension conveying equipment: QXG-250, line length 110 meters, variable frequency drive, heavy hammer tensioning

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