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Domů Products Coil coating line Coil coating

Coil coating

model-lakovaci-linky

Continuous production process

The metal substrate (steel or aluminium) is delivered in coil form from the rolling mill. Coil weight varies from 5-6 tons for aluminium and up to 20 tons for steel. 

The coil is positioned at the beginning of the line, and then unwound at a constant speed, passing through the various pre-treatment and coating processes before being recoiled. Two strip accumulators found at the beginning and the end of the line enable the work to be continuous, allowing new coils to be added (and finished coils removed) by a metal stitching process without having to slow down or stop the line. 

The following steps take place on a modern coating line:

  • Mechanical stitching of the strip to its predecessor
  • Cleaning the strip
  • Surface treatment by chemical conversion
  • Drying the strip
  • Application of primer on one or both sides
  • Passage through the first curing oven (between 15 to 60 seconds)
  • Cooling down the strip
  • Coating the finish on one or both sides
  • Passage through the second curing oven (between 15 to 60 seconds)
  • Cooling down to room temperature
  • Rewinding of the coated coil.

In addition to the application of organic coatings, the line is also used to apply laminating films.

Both coated and laminated sheets have high resistance to climatic, mechanical and chemical influences. We test all of this in laboratories as well as in real conditions.

We coat steel and aluminium

We process high-quality aluminium, steel and galvanised sheets from renowned European smelting plants on our coil coating line. All materials undergo an incoming inspection, and their quality is guaranteed by the manufacturer's inspection certificate.
Material Al alloys FeZn / Fe​
Quality EN AW 1050, 3*series, 5*series DX51-DX53, ​S220-S350, DC01
Thickness 0,4 – 2,0 mm 0,3 – 1,2 mm
Width 600 – 1 340 mm 600 – 1 340 mm
Inside ø of coil 500/600 mm 500/600 mm
Outside ø​ of coil 2 000 mm​ 2 000 mm​
Max. weight 3 500 kg​ 8 500 kg​
Min. order quantity 800 kg 1 500 kg
Coil coating - METAL TRADE COMAX, a.s.

Variability of our coatings

Material Surface Thickness Resistance Functional warranty
HD PES smooth 20 – 27 μm RUV 3 10 years
HD PES W texture 20 – 30 μm RUV 3 10 years
SHD PES smooth min 35 μm RUV 4 20 years
PUR-PA structured 45 – 60 μm RUV 4 20 years
PUR smooth 30 – 60 μm RUV 4 15 years
PVDF smooth 28 – 37 μm RUV 4 15 years
Primer/adhesive under the PVC x 7 – 12 μm x x
Backcoat smooth 3 – 18 μm RUV 2 1 year (for interiors)
PVC film structured 120 – 150 μm x 10 years
PET film smooth 30 – 50 μm x 10 years
michani-barev-comax

Exceptional colour range

Our proprietary colour mixing system gives us an exceptionally wide range of colours. We currently provide coatings in up to 2,000 colours derived from RAL, RAL Design, NCS or Pantone colour systems in a glossy, semi-matte or matte finish. 

We can prepare additional shades according to other colour systems or the customer's standard in a very short periodof time from 800 kg of coated aluminium or 1 500 kg of coated steel.

We also coat faux wood and 3D effects

Coated 2D surface

  • Smooth surface (matte/glossy), range of colours
  • Suitable for both HDG steel and aluminium
  • For both indoor and outdoor use
  • High abrasion resistance (RUV3)
  • Optional application of protective UV film
  • For sandwich panel manufacturers


2D Wood Design

3D coating effect

  • Attractive structured surface (alternating matte and glossy surfaces), range of colours
  • Suitable for both HDG steel and aluminium
  • For both indoor and outdoor use
  • High abrasion resistance (RUV3)
  • Optional application of protective UV film
  • For manufacturers of blinds and garage doors

3D Wood Design

3D patina effect

  • Smooth (matte), range of decors
  • For both indoor and outdoor use
  • High abrasion resistance (RUV3)

Special coating

With 5 decades of experience in coil painting and our in-house paint mixing and testing system, we can offer unique finishes and shades. For example, we can give you a few examples that are exceptional in terms of colour, surface structure or functional properties, such as resistance to UV, abrasion or chemicals, flexibility in further processing or, for example, optical reduction of unwanted gloss.

PES

PUR/PA

PVDF

Quality is important to us

A sophisticated control system allows us to maintain a consistently high quality of our products, optimise their properties and guarantee a long service life.

Our laboratories

We develop new colour formulas in our laboratory. We also test input materials (both sheet metal and paint) here, and after coating, our products undergo outgoing inspections. Our laboratory laminator also allows us to test PVC and PET films and their adhesion. 

We also use our laboratories to simulate corrosion load; we use different cycles of accelerated aging to monitor the durability of coated sheet metal.

Accelerated laboratory tests:

  • Salt fog
  • Water condensation
  • UV exposition + water condensation
  • Sun (Xe) exposition


uv-test-lakovaneho-plechu

Coated sheets also tested abroad

In addition to accelerated testing in our own laboratories, we subject our coated sheet metal to load tests in foreign accredited centres.

The samples we select include aluminium, galvanised sheet metal and all types of coatings, including film lamination. We use laboratories in Lisbon and Norway for our tests.

We prioritise the future

  • We incinerate the flue gases produced during coating and curing, which prevents the release of hydrocarbons into the atmosphere. We use the heat generated in production to heat production premises.
  • We recycle 100% of solvents – we regenerate used solvents by vacuum distillation and reuse them in production.
  • We are mindful of the energy efficiency of our production – we operate powerful rooftop solar power plants with an installed capacity of 2 MWp that cover a significant part of our energy consumption.

 

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