The housing is fabricated out of 14 gauge MS sheets and are of welded or bolted construction. The base is made of 10 gauge channel with removable gland plate on top and holes for grouting at the bottom.

Fabrication facility at "ANAND" is spread over 5000sq.ft area and includes state-of-the art shearing and bending machines. We have semi-automatic nibbling and notching machines to have any type of cut-outs required in the enclosures. Our comprehensive tooling division ensures any type of specialized or customized fabrication works can be undertaken by us.

Unique features of our pre-treatment and paintshop:

	Large size and 8 tanks.
	Phosphoric acid based pre-treatment chemicals.
	Boilers for adequate heating of tanks.
	Powder Painting booth of Thermax make.
	Electrostatic guns for uniformity of paint coating (used from 2 sides).
	Electric hoist for better object movement.
	Diesel Fired and Electric Heated Baking Oven-size 2.8 x 2.7 x 1.8 meters (H x L x W)
	Air compressor with moisture and oil preventing filters.

 

Fabrication: is the first stage of production process and is performed inside the factory premises. Fabrication is done according to work order drawings using suitable machines viz. hydraulic shearing, power press, press brake, notching and electric welding machines. Completion of fabrication is followed by inspection done by our QC Inspection Team as per the quality plan.

 

 

Pre-treatment and Painting: The second stage is the pre-treatment of the product. This activity ensures that the metal surface is free from traces of oil, grease and rust and a very thin layer of iron phosphate is deposited before it is painted for good adhesion of paint.

Pre-treatment is done by following a process of dipping in tanks of 3000mm (long) x 1100mm (wide) 1200mm (deep) by help of electric hoist of 3ton capacity running over the tanks. Process flow during the pre-treatment is as follows:

T-1: De-greasing Tank: This is a PVC & Rubber linked tank having heavy duty alkaline media. The tank is heated to a temperature of 60ºC to 70ºC.

T-2: Water Tank: Rising in water to remove alkaline salts. Running water is used in this tank.

T-3: De-Rusting: The acid bath removes all rust and exposes the virgin metal. The use of phosphoric acid as base, though expensive gives better ultimate quality of coating Temperature of tank is about 50ºC.

T-4: Water Tank: Rising in water to remove alkaline salts. Running water is used in this tank.

T-5: Surface Activation: After rinsing in water tank (T-4) the enclosure is dipped in this tank, where traces of acid are removed and now it is ready for phosphating.

T-6: Phosphating Tank: The tank provides a fine layer of phosphate which helps in excellent adhesion of paint as well as it prevents the virgin metal to rust in oxygen and moisture laden atmosphere. Temperature of this tank is maintained at 50-55ºC.

T-7: Water Tank: Rising in water to remove alkaline salts. Running water is used in this tank.

T-8: Passivation Tank : This tank is kept at 70ºC and imparts stability to phosphate layer.

Painting: After the completition of pre-treatment process, the product is ready to be painted. This activity is performed to cover the metal surface with non-rusting material and to give the desired shade and finish to the product. We have a facility for both liquid paint as well as powder coat paint. As a standard practice we provide powder coat paint, whereas liquid paint is available on demand/special application.

a). Liquid Painting:

After pre-treatment of the enclosure and parts, primer coat comprising of Red Oxide or Zinc Chromate is applied by spray gun. Primer coat enhances adhesion and prevents rust formation. Then it is baked an oven at a temperature of 120°C. Metal putty is used wherever required for obtaining smooth surface of component, thereafter a coat of surfacer is applied. Water emery paper is used, if required and two coats of final paint is applied using spray gun, followed by baking in oven at 120°C.

b).  Powder Coat Painting:

After pre-treatment and cleaning of the enclosure and parts with, powder is sprayed with the help of powder spray gun. The powder sticks to the panel surface due to the electrostatic charge. The spray gun helps to deposit a uniform coat of paint to a thickness of 50-70 microns. Thereafter, it is baked an oven at a temperature of 120°C or as recommended by the powder manufacturer. The temperature and duration of curing varies from shade to shade and manufacturer.