PROCESS OF PAINTING
(EPOXY POWDER COATING PROCESS)
On request, the appearance of the products Carpal can be improved through a drawn painting operation performed polyester powder.
The process of polyester powder painting develops in the following phases:
Process Engineering: shot blasting machine is via automatic modular jet with spherical metallic grit for the removal of surface impurities allowing the elimination of oxides, welding slag, ash and lumps.
Chemical Process of Phosphodegreasing: by degreasing the material is cleaned by waste machining oils and after with the use of phosphates is allows the powder paint to have a good seal adhesion.
Thermodrying: a process that occurs in a tunnel of controlled ventilation to ensure that the poles and accessories come in spray booth perfectly dry.
Thermosetting powder coating: A process that takes place in the cabin of the latest WAGNER generation fully automatic self-cleaning and allowing a perfect powder distribution up to 70/80 microns thick.
Cooking: at this stage polymerization takes place in the oven at a constant temperature of 190 ° for a minimum time of 50 minutes.
4. Controls and packaging
Controls: in this phase the material still attached to the system of painting, suffers a careful visual check by which ensures that the material is uniformly painted, that there are no differences in color, bubbles and cracks.
Packaging: only if the material is painted perfectly packaged individually, by a special coupling of bubble wrap 120 gr + expanded by 2 mm, and subsequently packed together with the other by plastic strapping.
PAINTING PROCESS FOR
Besides a purely aesthetic function, this painting process for salty environments guarantees a long protection in particularly aggressive environments.
The painting process for salt environments is developed in the following phases:
1. Alkaline degreasing to remove organic contaminants such as processing oils and flow-coating storage residues, for a time of 5 minutes with water and product at temperature of 60°;
2. Flushing flow-coating with tap water for 5 minutes;
3. Flow-coating pickling based on phosphoric acid at a temperature of 50°, for a time variable according to the oxidation of zinc to obtain a good adherence of the paint;
4. Flushing flow-coating with mains water at room temperature for 5 minutes;
5. Fluozirconic flow-coating passivation no chrome-free rinse suitable for depositing on the piece with an excellent chemical anchor a layer of 0.5-0.6 micron thickness of fluoride zirconium necessary for an excellent corrosion resistance and oxidation to improve the blistering (paint peeling);
6. Flushing flow-coating with mains water at room temperature for 5 minutes;
7. Final flow-coating rinsing with demineralized water at room temperature for 8 minutes;
8. Drying in oven at 130/50°;
9. Application of primer based on epoxy zinc powder 50/60 micron thickness;
10. Polymerization in ventilated oven with forced air circulation up to complete cross-linking of the paint film respecting the indications given in the supplier's data sheet 180° oven temperature product;
11. Application of TGIC Free polyester powder in the cab with n° 10 automatic guns up to reach 60/70 microns thick;
12. Polymerization in ventilated oven with forced air circulation up to complete cross-linking of the paint film respecting the indications given in the supplier's data sheet 180° oven temperature product;
13. Quality Controls: in this phase the material still fixed to the painting plant suffers a accurate visual check by means of which it is ensured that the material is uniform painted, that there are no differences in color, bubbles and cracks;
14. Packaging: only if perfectly painted, the material is individually packed by means of a special lamination of 120g + 2 mm bubble wrap, e subsequently packaged together with the others using plastic straps.