DATE:6/20/2019 HIT:1699 SOURCE: AUTHOR:

  • Uncoiler
The uncoiler in color coating line is also called decoiler, Pay off real, uncoiling machine, unwinder, unwinding coiler etc
In the color coating line, it equipped with two set single head uncoiler or  double-heads uncoiler at the entry of whole line to hold the coil on the mandrel. when the mandrel expands and rotates, the uncoiler tightens the coil and unwinds the strip to the next equipment. it feed the strip continuous during the line operation.


1. Insert the steel roll into the uncoiler mandrel, and meanwhile, expand the mandrel to tension and fix the steel roll.The uncoil mandrel is driven to rotate by variable-frequency AC motor, so as to make the steel plate to maintain the required certain back tension.

2. The uncoil mandrel is can tilever type and is driven by chains and standard reducer.

3. The gearbox base is made up by heavy steel plate.

4. In the mandrel, there are four expandable valves, and the expanding and retracting of the valves are controlled by there volving hydraulic cylinder at the mandrel tail.

5. There are four main sliding blocks made of bronze.

6. The maximum diameter of the expanded mandrel with rubber sleeve is 508mm or 610mm.

Technical Parameters

Size of steel roll:

-- Outer diameter of steel roll:Maximum ofØ 1500mm

-- Inner diameter of steel roll:Minimum ofØ 508

-- Width of steel roll: `800-1250mm

Maximum steel roll weight:15-25 t

Frame and base:Welding low carbon steel

Mandrel and pull rod:40Cr

Valve:Cast steel

Main sliding block:Casting aluminum brass


-- Retracting size:Diameter of 450mm

--Expanding size:Diameter of 508mm

Rubber sleeve:Thickness of 51mm

Mandrel expanding and retracting:

-- Expanding andretractingactuator:One rotating hydraulic cylinder


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