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The processing lines for cold rolled sheets and strips are endowed with special oiling installations, with the purpose of protecting the sheets and strips surface against the environment agents that cause their deterioration during long storage periods or during maritime transportation.

The existing oiling installations employ a pair of rubberized rollers in permanent contact with the strip, to which the coating oil is applied through some oil dosage rollers from a tank that is periodically refilled with the aid of some pumps form an adjacent tank. This oiling system has the following deficiencies:

 it does not allow the dosing of the quantity of oil deposited and hence the thickness of oil film deposited on both sides of the strip
 significant losses of oil and its uncontrolled dispersal along the processing line
 the oiling installation is complicated from the mechanical point of view and uneconomic in operation

GALFINBAND proposes another principle for the oiling installation, i.e. by employing some special spraying nozzles, fed from a pumping installation.

1. The strip which is to be oiled goes through a closed and sealed casing, endowed with two ramps (up-down) with spraying nozzles on both its sides. The oil excess is collected at the lower part of the housing and evacuated by free falling in the pumping tank. The second new element is the existence of
a pair of rollers coated with a special polyurethane layer which homogenizes the thickness of the oil film on the strip. These rollers are positioned behind the spraying installation. This way, the installation achieves the dosing of the oil quantity expressed in g/m3, depending upon the strip speed.

2. The oiling degree can be selected from the control box, which has a digital display with functional keys: slight oiling, medium oiling or good oiling.

3. Also, the functioning of the upper part, the lower part or both parts at the same time can be selected.

4. In order to avoid the depositing of a too large quantity of oil and therefore to avoid its loss, the installation traces the strip speed, the position of the leveling roller ' expressed in microns ' (only at the cut-to-length lines), the oiling times and pause times correlated with the strip speed and oil temperature. The oiling installation has an adjustment pump for the oil pressure and temperature (automatically controlled in order to get the optimal viscosity needed by the spraying nozzle).


5. In the case of cut-to-length lines, the spraying is intermittent only during the presence of the sheet in the machine. The leveling rollers for the oil layer thickness are driven by a variable speed motor for their synchronization with the line speed. In the case of the slitting lines, the rollers are idle, their rotation being caused by the strip to be oiled itself.

6. Technical characteristics

 Working pressure: 1±3 bar
 Oil flow: max 0,8 l/min for a nozzle
 Thickness oil layer: 1±10 microns
 Optimal working temperature of oil: 40±50 oC

7. The functions of the automatic guiding and control system:

 Functioning regimes: MANUAL / AUTOMATIC
 Process data acquisition and processing
 Sequential control of the execution elements
 Control and adjustment of the essential parameters
 Operator's informing upon the process progress
 Automatic alarming and protection in case of abnormal situations
 Display of the exception events emerged
 Imposing of specific technological parameters


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