Fully automatic spray painting line for plastic products 

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Fully automatic spray painting line for plastic products technical specifications and requirements

1, the design conditions

Name: plastic shell

Material: Plastic (ABS + PC+PP+PET+PE)

Workpiece size: H100 Φ300mm

Design production: 3000 pieces / Hr (according to the conventional workpiece)

Chain speed: 3-12m / min (continuous adjustable)

Transmission: plane automatic transmission (about 75 meters across the board)

Fixture spacing: 38.1mm, pin pitch 38.1mm

Site area: L46 meters * W27 meters * H3.9 meters

Spray method: fixed gun spray

Heating method: electric heating

Curing time: pre-bake 7 meters, 35 meters baking primer, UV homogenization of 25 meters

Purification level: Painting area (spray room, bake Road, paint room,) for the 10,000 level, 

the other area of 10 million

2, the painting spray process

On the A line → manual dust removal → automatic dusting → preheating → spray primer (fixed 12 guns)

 → leveling (4min) → IR curing (80 ℃ 35m) → 5m cooling → topcoat (fixed 12 guns) 

→ IR Homogenization (60 ℃ * 25m) → UV light curing (8-5KW) → cooling → lower → coating.

On the B line → manual dust removal → automatic dust removal → spray UV paint (fixed 12 guns) 

→ IR homogenization (60 ℃ * 25m) → UV light curing (8-5KW) → cooling → Unloading.

3, the specific process outlined

The entire painting operation area (including the upper and lower parts) for the whole closed 

decoration, staff entrance with the wind leaching room and the outside world partition, the region by 

the strong supply of fresh air supply device after purification to ensure that its air cleanliness Not

 less than 100000 level. After the work piece is taken out, the assembly workbench is arranged in the

 room. The workpiece is manually assembled and then manually removed by electrostatic dust. 

The workpiece is sent to the "spraying line" through the plane conveyor. Pieces of room ", 

and then with the conveyor chain on the rule of plug. (Please note, the program used in the governance

 of the special design, processing, and its rotation flexibility, easy to plug, is the industry's 

leading technology). On-line workpiece into the automatic dust removal device before the first through

 dehumidification drying section, the equipment is our company through continuous summary and 

continuous communication with the user and specially designed, mainly to reduce the workpiece surface 

humidity, to ensure the quality of the spray. Then the workpiece through the automatic addition to 

electrostatic dust removal device, once again eliminate the residual electrostatic charge on the 

workpiece and dust. In order to make each part of each workpiece can be completely dust, the conveyor 

chain in the station with a self-rotation device, the workpiece in addition to automatic electrostatic

 dust removal is carried out in the rotation, dust removal effect is good. We use the electrostatic

 precipitator for the German products Si Dike licensing, a well-known brands. Pay attention to the 

workpiece dust removal is a significant feature of this program.

After two dust removal of the workpiece directly into the spray chamber. Spraying room is an important

 work area of the production line, the fresh air sent by the gas supply device through the 99.995% 

efficient filter again after the fine filter into the spraying room; cleanliness of 10,000 or less, 

the exhaust is Spray cabinet exhaust fan pumping to the roof. Before the exhaust emission, which 

contains more than 80% of the paint mist has been spray cabinet and the vortex double handle the 

collection, generally do not exceed the emission limit standard. The design of the indoor air flow 

velocity of spraying is 0.6 ~ 1 m / s, in order to ensure safety, non-toxic, and no vortex airflow and

 secondary pollution.

This program uses Japan's Iwata] [brand of automatic spray gun, the paint spit out a stable and 

reliable, to ensure the quality of spray. Fixed spray gun is divided into two groups, is a turn, a

 group of reversing, each with six guns, respectively, while the workpiece on-line spraying. In order

 to obtain a uniform coating of the various parts of the uniform, the transmission chain in the 

spraying station are equipped with forward and reverse rotation of the two devices (80 to 200 r / min,

 frequency control), with the fixed gun match. When the photoelectric sensor to fixture to hang a 

workpiece, the rotation device starts, and then set the spray conditions to start automatic spraying. 

This kind of workpieces can be sprayed in rotation. As long as the rotational speed and spraying 

conditions are properly set and matched, not only the obtained coating film is extremely uniform, the 

quality is stable and excellent, and the coating is saved very much. This program selection of special 

fixed gun and the conveyor belt with the rotation device to match, so that the conveyor and fixed gun 

are fully coordinated with the work, the state is stable, complement each other, but also a major 

highlight of the set of equipment.

The sprayed workpiece then enters the leveling section. The leveling section is provided with an air 

supply device and an exhaust device to ensure that the paint concentration in the leveling room does 

not exceed the explosion limit and ensure safety.

The flattened workpiece enters the drying oven and is cured by electrical heating. Curing furnace 

heating using hot air circulation form. The company's manufacturing oven not only looks beautiful, all 

with stainless steel liner, not rust, suitable for regular maintenance of clean. Because the heating 

pipe is evenly distributed, it is regulated by PID proportion type, the furnace temperature is stable 

and uniform, and the instrument is equipped with automatic display and record the temperature of each 

measuring point in the furnace, so as to record and visualize conveniently. Baking about 15 minutes 

after the workpiece baked into the cooling section, after the fresh air cooling, to ensure the quality 

of the paint UV coating, but also equipped with exhaust, timely discharge of hot air.

In the workpiece into the UV light curing machine before, have been IR homogenization, and its role in

 the UV curing of the workpiece before the preheating activation of the coating molecules to ensure 

the quality of UV curing. Followed by UV light curing. UV light curing machine according to set the 

program boot. The company designed the UV light curing machine, adjustable workpiece and lamp distance.

 To ensure that light curing time and set the energy are just right. At the same time, light curing 

station conveyor chain is also equipped with rotation device to ensure uniform irradiation, uniform 

curing.

After-sales service

My company to fast, good after-sales service to win the trust of customers:

Free debugging of products and technical training.

Regularly maintain the equipment.

Warranty period of one year, responsible for maintenance.