RSPRE-003 Spray Pre-treatment Production Line

Application

 

Coating equipment-pre-coating treatment equipment

 

If the surface of the object to be coated is not good, no matter how good the powder coating is, the coating film will have defects such as pinholes, peeling, and blistering, and the corrosion protection effect cannot be improved. Therefore, in order to fully exert the performance of the coating film, the grease, dirt, moisture, rust, oxides, etc. on the surface of the object to be coated must be removed by chemical or mechanical methods to make the metal surface clean before coating. If corrosion resistance, drug resistance and adhesion are required, phosphate film treatment is required.

 

Pretreatment equipment is generally divided into two types: spray type and immersion type. The following are various standard pretreatment processes:

 

1. Zinc phosphate spray process:

Pre-stripping tank ==> Main stripping tank ==> Water washing tank ==> Water washing tank ==> Surface conditioning tank ==> Film tank ==> Water washing tank ==> Water washing tank ==> Drying

 

2. Zinc phosphate immersion process:

Degreasing tank ==> Water washing tank ==> Water washing tank ==> Surface conditioning tank ==> Film tank ==> Water washing tank ==> Water washing tank ==> Drying

 

Features

 

• Thorough cleaning: Combining immersion and spraying, it can fully and deeply clean the grease, rust, dust and other impurities on the surface of the workpiece to ensure the cleanliness of the workpiece surface.
• High efficiency and energy saving: Through high-pressure spraying, the cleaning speed can be accelerated, and the cleaning fluid can be recycled to reduce waste and achieve the purpose of energy saving.
• Easy to operate: The equipment has a high degree of automation and is simple and convenient to operate, which can reduce the labor intensity of workers and improve work efficiency.
• Strong applicability: The equipment is suitable for workpieces of different shapes, sizes and materials, and can meet the cleaning needs of various complex workpiece surfaces.
• Improve coating quality: The surface of the workpiece after cleaning is smoother and cleaner, which is conducive to the adhesion and uniform distribution of the paint, thereby improving the coating quality and the overall quality of the product.
• Good environmental protection: Recycling cleaning fluid reduces wastewater discharge and meets environmental protection requirements.

 

In summary, the immersion spray pre-treatment equipment has the advantages and advantages of thorough cleaning, high efficiency and energy saving, easy operation, strong applicability, improved coating quality and good environmental protection.

 

Specifications

 

The technical parameters of the immersion spray pretreatment equipment may vary depending on the equipment model and application scenario. The following are some common technical parameters for reference only:

 

Process speed:
Usually 0.35~7m/min, which can be adjusted according to actual needs.

 

Tanking temperature:
The pre-degreasing, degreasing, and re-degreasing tank temperatures are generally 60~80℃.
The phosphating tank temperature is generally 30℃.
The hot water washing tank temperature is generally 4050℃ (or 4555℃).

 

Processing time:
The processing time of each process is determined according to actual needs, such as pre-degreasing, degreasing, and re-degreasing times are 120s, 80s, 80s, etc.

 

Spray pressure:
The water washing spray pressure is generally controlled at about 0.1MPa.
The phosphating spray pressure is generally controlled at 0.1~0.2MPa.

 

Tanking management:
The oil content of the degreasing liquid should be controlled below 5g/L.
The total acidity, free acidity, accelerator concentration, pH value, etc. of the phosphating solution need to be regularly tested and adjusted to the specified range.

 

Equipment size:
The total length of the production line, the length and width of each treatment section, etc. are customized according to actual needs.

 

Other parameters:
Such as the material, anti-corrosion performance, degree of automation, control system, etc. of the equipment, also need to be selected according to actual needs.

 

The above technical parameters are not fixed values, but vary according to the specific model of the equipment and the application scenario. In actual applications, the most suitable technical parameters should be selected based on comprehensive consideration of factors such as the material, size, shape of the workpiece and the overall layout of the production line.

 

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