FAQ

Cause Analysis of Uneven Thickness of Spiral Corrosion Protection Coatings

Spiral coating process if the coating thickness is not uniform, will inevitably form the butcher data spoilage, which is due to ensure the thinnest coating thickness reaches the minimum specification, the thick part of the thickness will be greater than Coated specification thickness. And under uneven coating conditions is very simple to form the thickness of the coating at the thinnest steel pipe not up to standard conditions. The reason for the uneven thickness of the production process showed that there are several main reasons for the uneven discharge of a few days, steel pipe twists and turns. 3PE pipe corrosion control coating uneven situation is useful to adjust the number of extrusion die several anti-corrosion coating thickness as uniform as possible, substandard pipe coating method is not on-line strategy.
Cause Analysis of Uneven Thickness of Spiral Corrosion Protection Coatings
Coating appearance wrinkles: Polyethylene material extrusion winding onto the steel tube roll roller pressure requirements, the process of improper adjustment may form a coating appearance wrinkles extrusion. In addition, the polyethylene material extrusion process from the exit mode when the melt film rupture will occur similar to the quality defects folds, wrinkles occur due to the corresponding control methods have to adjust the hardness and pressure roller and the pressure roller Point of view, the appropriate amount of polyethylene extrusion control melt film rupture.

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