Steel Strip Color Coating Lines

Description

Engineering company ENCE GmbH in collaboration with ANDRITZ METALS, Germany SUNDWIG GmbH offers complex steel strip color and polymeric coating lines with the following basic characteristics:

Incoming material:	galvanized strip
Strip thickness:	0.2–2.5 mm
Strip width:	500–2000 mm
Coil weight:	2 — 32 tons
Process speed:	up to 200 m/min
Coating types:	polyester, epoxy, acrylic, PVC and others

The line consists of:

Input section: (similar to the strip galvanizing line)
- Coil rack
- Loading carriage
- Dual decoiler system
- Dual guillotine shears
- Butt-welding machine
- Looping pit
- Disc shears
- Stretching machine
- Stretching rollers
- Multistorey storage loop (accumulator)
Strip preparation section
- Strip surface degreasing bath with brushes
- Strip washing bath
- Electrolytic pickling bath
  - Designed for increasing the strip surface roughness
- Strip washing bath
Strip drying section
- Electric infrared furnace with ceramic reflectors and tungsten quartz shortwave lamps
  - It has a strip width control system and quickly switches off in case of shutdown
Precoating section
- Roller machine for two-side or one-side precoating (chemical coater)
- Electric infrared furnace for primer curing
- Designed for evaporating water vapor and solvent
- Provided with exhaust system which removes gaseous wastes to the incinerator (thermal incineration plant)
- Cooling rolls system
  - Rolls with water cooling; the strip is cooled down to 38°C
Strip color coating section
- Roller machine for two-side or one-side color coating (chemical coater)
- Electric infrared furnace for color coating curing
  - Designed for evaporating water vapor and solvent
  - Provided with exhaust system which removes gaseous wastes to the incinerator connected with the precoating system
Cladding coating section
- Laminator with a system of cladding rollers
  - The film is applied by hot laminating method (rollers apply softened film to the full width of the strip)
- Disc shears
  - Designed for cutting the side edges of the film
Strip straightening section
- Strip alignment system
- Stretch straightening machine (machine for straightening by stretching)
- Strip cooling section
Output section:
- Strip feeding device
- Vertical storage loop (accumulator)
- A feeding device with a mechanical side guide
- Surface quality control system
- Dual tension reel for finished strip (coiler)
- Strip marking plant
- Horizontal shears for finished strip
- Overhead crane
- Tilting cradles for finished coils
- Finished coils rack