Perfume Bottle Coating Line

Perfume bottle coating line involves multiple key systems to ensure automation, efficiency, and environmental friendliness in the coating process. Uniformly paint spraying onto the bottle surface to achieve decorative and protective purposes. In the production of cosmetic glass bottles, spray coating can give the bottles rich colors and diverse appearance effects, such as high gloss, matte, pearlescent, transparent, and gradient finishes.

Perfume Bottle Coating Line Core System

Conveyor System: Responsible for smoothly transporting glass bottles between processes, typically using chain or mesh belt conveyors, with adjustable speeds to accommodate different production rhythms.

Pretreatment System: Includes steps such as washing and drying to remove oil and impurities from the surface of the glass bottles.

Coating System: The core equipment consists of spray guns (such as electrostatic or air spray guns), paint/powder supply systems, and a spray booth. The spray booth is equipped with ventilation and paint mist treatment devices to minimize environmental pollution. An automatic rotation mechanism ensures the bottles are evenly coated, avoiding dead spots.

Drying and Curing System: Uses hot air circulation or infrared heating to quickly dry and cure the paint. Temperature and time can be precisely controlled, and some systems also include a cooling zone to ensure product quality.

Control System: Integrates PLC (Programmable Logic Controller) and touchscreen interfaces to achieve full line automation, including speed adjustment, temperature settings, and fault alarms.

Spray Coating Process

1- Bottle Loading and Cleaning

The glass bottles to be coated are placed on a conveyor belt and undergo initial cleaning to ensure that the bottle surface is free of stains, impurities, and residues.

2- Flame Treatment

Flame treatment removes oil and impurities from the glass bottle surface and increases the surface roughness, improving coating adhesion.

3- Electrostatic Dust Removal

Electrostatic dust removal equipment is used to remove static electricity and dust from the glass bottle surface, ensuring a clean spraying environment.

4- Paint Spraying

Based on product requirements, the appropriate paint and spraying method (such as air spraying, airless spraying, electrostatic spraying, etc.) are selected, and the paint is uniformly sprayed onto the glass bottle surface. During the spraying process, attention must be paid to controlling parameters such as paint viscosity, air pressure, the distance between the nozzle and the surface, and the movement speed of the spray gun to ensure coating quality.

5- Preheating and Curing

After spraying, the glass bottles are sent to a preheating oven for preheating treatment to allow the solvent in the coating to evaporate. Then, the bottles are sent to a curing oven for curing treatment, where the coating undergoes a cross-linking polymerization reaction at high temperature, forming a stronger and more stable paint film.

6- Cooling and Unloading

After curing, the glass bottles are removed from the curing oven and cooled. Once the bottles have cooled to room temperature, they can be unloaded and packaged.

Key Techniques in the Spray Coating Process

Paint Viscosity Control

The viscosity of the paint has a significant impact on the spraying effect. Too high a viscosity will lead to poor atomization of the paint, resulting in a pitted surface; too low a viscosity will easily cause sagging and excessive paint mist. Therefore, the paint viscosity needs to be adjusted to an appropriate range using a viscometer or visual inspection method, depending on the paint type and spraying requirements.

Air Pressure Control

The air pressure directly affects the atomization effect and spraying efficiency of the paint. Too low pressure results in poor atomization; too high pressure leads to sagging and excessive overspray. Therefore, the air pressure must be strictly controlled during the spraying process.

Nozzle-to-Surface Distance Control

The distance between the nozzle and the surface also significantly impacts the spraying effect. Too close a distance can cause sagging; too far a distance results in uneven paint application and potential pitting. Therefore, the distance between the nozzle and the surface needs to be adjusted appropriately based on factors such as paint type, viscosity, and air pressure during the spraying process.

Quality Inspection and Control in the Spraying Process

Appearance Inspection: This mainly checks whether the coating surface is smooth, has uniform color, and is free of defects such as bubbles and impurities. Visual inspection or reflected light methods are typically used.
Thickness Measurement: This mainly measures whether the coating thickness meets the standard requirements. Mechanical or optical measurement methods are typically used.
Adhesion Testing: This mainly checks whether the adhesion between the coating and the glass bottle surface meets the standard requirements. Scratch testing or pull-off testing methods are typically used.

Perfume bottle coating line FAQ

What information required to design the line?

We need to know about your bottle size, output rate and the type of coatings you’re going to use. It’s the best if you can send us the bottle samples and technical documents of the coating.

How can I install the line?

We will send out engineers for onsite installation and testing till everything works properly with your production.

What’s the cost?

Since it’s a custom setup plant, please proide us above necessary information so we can quote the best price for you.