Oil Spot on Aluminum Foil Surface is 1 key point towards the quanlity of foil,the greater control of oil quantity will result in the superior quanlity.
Causes of oil spots on Aluminum Foil Surface:
Right after the Oil Spot on Aluminum Foil is annealed, the approach lubricating oil remaining on its surface will decompose, crack, polymerize and oxidize the reaction to make resinous material and deposit around the aluminum plate. The surface on the foil is formed with oil spots. The principle reason for the above-mentioned defects in the actual production The following aspects:
1, higher viscosity hydraulic oil mixed with rolling oil technique brought on by elevated viscosity of rolling oil.
two, the higher the sulfur generated the much more the tendency of annealing oil spots; aromatics content material increased, return clean deterioration.
three, aluminum foil finished item annealing process isn’t proper.
four, coiling tension is as well big porosity is also tiny.
5, aluminum foil surface with as well substantially oil.
The answer of Oil Spot on Aluminum Foil Surface:
1, the regular replacement of new rolling oil, to strengthen daily inspection, to prevent higher viscosity hydraulic oil mixed with rolling oil.
Higher viscosity hydraulic oil or lubricating oil mixed with rolling oil will pollute the rolling oil, in order that the viscosity of your rolling oil caused by aluminum foil annealing following the oil spots. Within the premise of making sure the hydraulic impact as far as you possibly can the use of low viscosity hydraulic oil or replaced with no stains hydraulic oil.
two, choose the acceptable process oil.
The tendency of n-alkanes to produce annealed oil spots is minimum and the kerosene is the largest, but the n-alkane content material is also higher to affect the mutual solubility with the additives.
3, to create a appropriate aluminum foil annealing process.
Rolling oil within the annealing furnace mostly by the oil diffusion and evaporation to clear, if the rolling oil and furnace oxygen is just not fully burned, it will kind a yellow oil spots. Excessive temperature will make the rolling oil to diffuse and volatilize oxidation to kind oil spots, shorten the annealing time will probably be detrimental towards the evaporation of rolling oil, resulting in oil is just not clean.
four, strictly manage the coiling tension and pressure roller pressure, to sustain the acceptable porosity.
Rolling oil in addition to the annealing temperature, the physical and chemical properties of rolling oil, surface high-quality and other elements, but additionally the degree of tightness involving the layers, it really is appropriate to correctly handle the coiling tension.
five, to reduce the surface oil.
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