Conical Pole Production Process

1. Raw material selection
We use aluminum alloy 6063 material bar. lt is high quality building material, widely applied in construction projects such as aluminum windows and doors, curtain wall frame and so on. lt guarantees the products have corrosion resistivity in the natural environment and will never rust . At the same time, in order to make sure flagpole's regular productlon, we select the alumInum alloy material strictly and does homogenization processing.

2. Precise numerical control extrusion
We have own extrusion production line, which meets the standard raw material supply. lt enormously reduce production processing cycle.

3. Numerical controlled spinning
With tho advanced entire numerical controlled spinning equipmont, it forms cone shape or other different spindle shape in the high speed revolving process. The whole profile does not have welding joint but has smooth line and extremely round circle shape.

4. Intensity processing
In order to make aluminum alloy material have steel intensity, our lighting poles must pass through several heating treatment procedure in order to meet international intensity standard for aluminum alloy material.

5. Base plate welding
ln order to make sure base intensity, all lighting poles bases are casting aluminum material. The base plate use automatic welding machine to weld, in this high grade welding process,the welding intensity and artistic can be guaranteed.

6. Access door
Each light pole has an access door for the installation of the electrical junction box. We use advanced cutting machine to cut the door, so the door is part of pole and is tightly matched, and the crack gap is even, which guarantee the door waterproof. Generally access door is 500mm up from the ground in the poles (also may based on the shape of poles). At the back of door，that is inside the pole, there's a aluminum rail welded for fixing the junction box. Lock is specially made with stainless steel anti-theft screws, and only professional tools provided can open, thereby this enhances the product's security performance.

7. Grounding system
Use a "L"-shaped folded aluminum workpiece, one side is welded to the wall of the pole, on the other side, drill a M8 hole in the center for the grounding wire.

8. Anticorrosive protection for the bottom of lighting pole
We protect bottom part of lighting poles to prevent alkaloid ingredient corrosion from salt soil and mechanicalness damage. The protection coating is environmental protection. We use epoxy resin to cover bottom and up to 200mmm pole surface. The inserted type poles bottom should cover epoxy resin wholely. Protective layer thickness is between 0.7mm-1.0mm. In addition, in order to prevent construction damage, our lighting poles have pyrocondensation membrane at bottom place, please get rid of it when theconstruction completes.

9. Surface treatment
(1) Anodic oxidation
We offer anodized finish as standard because it provides the best quality product. Brushed poles cannot offer the same lever of protection and easily blacken in polluted aggressiive environments such as coastal corrosion areas, traffic intersections and salted road are susceptible to corrosion. Anodizing is used to protect the aluminum surface of poles, extension arms and ornamental motifs from corrosion.
Anodizing is an electrochemical method which creates an oxide layer on the surface of the metal. Anodized coatings are supplied in several thickness of coating appropriate to the installation location and local conditions. The standard anodized coating is 12 microns and this ensure safe use in moderate to harsh conditions.
Anodic oxidation process of general profile as follows:

① Degreasing
No matter how you process the aluminum products, the surface will exist in varying degrees, dirt and defects, such as dust, metal oxides (oxide film formed under natural or high temperature), residual oil, asphalt signs, artificial handling fingerprints (the main component is fatty acids and nitrogen-containing compounds), welding flux, as well as corrosive salts, metal burrs, scratches and other minor draw. Therefore, prior to oxidation treatment, it is necessary to use chemical or physical methods to clean the surface of the products in order to expose metal matrix to do oxidation coloring and get the artificial membranes, which is combined with the solid matrix. lts color and thickness will meet the requirements and it has the best corrosion resistance, wearable, weatherproof performance.
② Alkali etching (caustic washing)
Alkali etching is the process that wash the surface of aluminum products in the sodium hydroxide solution within or without other substances, also known as alkali corrosion or caustic washing. lts role is to make up degreasing and do further cleaning, to remove natural oxide film and minor abrasions on surface. So that products expose clean metal matrix which is conducive to the generation of anodic film and has a high-quality film. In addition, by changing the composition of solution, temperature, processing time and other operating conditions, we'll have smooth, satin-matt, gloss or other kinds of corrosion washing surface.
③ Bright (neutralization)
The gray or black hanging ash which attach on surface of aluminium products after Alkali etching will not be dissolved in the cold or hot water，but can be dissolve in acidic solution, therefore, after Alkali etching, products should wash in acid solution in order to remove the hanging ash as well as residue lye and expose bright basic metal surface, this process is called neutralization, or bright processing.
④ Anodized
Aluminum or aluminum alloy products as the anode is placed in electrolyte solution (sulfuric acid solution commonly), through electrolysis, to make aluminum oxide film formed on the surface, this process is known as anodized.
⑤ Colouring
a. Chemical coloring: Chemical coloring process is simple, easy to control, having a wide color range and the color is bright.
(a) Monochrome staining: immerse aluminum products which is finish anodic oxidation and washing into the dye liquor that is in stated temperature.
(b) Multi-color staining: two or more colours are required on aluminium products, such as landscapes, flowers and birds, text, mainly use printing process to complete.
b. Electrolytic coloring
Electrolytic coloring process is sun-proof and hard to fade, it is the most widely used method of coloring. Through changing the dyeing time, we may gain yellow, champagne, bronze colour, brown, black and so on.
⑥ Sealing
In order to improve the quality of aluminum and dyeing, the micro-porous of the oxidized film should be closed after colouring. After sealing treatment the surface becomes even and non-porous and form a dense oxide film. Dye depositing in the oxide membrane is indelible. And the oxide film has no adsorption, which will avoid being contaminated by absorption of harmful substances and early erosion, thus it improves anti-pollution and anti-corrosion of anodic oxide film. Commonly hydrated sealing way, inorganic salt solution sealing way, transparent organic coating sealing way after dyeing are available.
Features of anodized pole: Anodized layer is part of metal surface, which will not peel and flake, and the color won't fade;
Long life: through anodic oxidation treatment, product forms a 12 microns sealing film in order to ensure the poles to resist corrosion in nature and no significant discoloration in 25 years.

(2) Fluorocarbon coating
A new coating material, it has excellent anti-fade, anti-frost, anti-air polluted (acid rain,etc.) corrosion, anti-UV ability, and strong anti-crack and the ability to withstand harsh weather conditions that the general coating can't reach.

(3) Powder coating
Light pole surface can be colored polyester powder coating, bright color, anti-ultraviolet radiation, non-fading.

Note: Because rod body, boards, wire and other material differences, anodizing would produce a certain color.

NOTICE: Anodizing inherently results in color variations on aluminum as the material difference between the poles, the base and the welding material, it is inevitable. lf you want to ensure the color consistency on surface of poles, powder coating or fluorocarbon coating is recommended.