Defect Analysis of Aluminum Foil（2）
2017/1/19 17:31:21
18. Face pattern
Aluminum foil at the end of the whole or the whole point of view, the tube along the wall thickness was radial pattern; open-book where the edge of the aluminum foil there is a slight wave.
19. White bars
Aluminum foil surface in the rolling direction, width or spacing of white stripes. Generally corresponding to the casting strip under the surface, stripes and more concentrated in the middle of the aluminum foil, rib position, with the aluminum foil rolling thinning, stripes were significantly increased trend.
20. wrinkles
Aluminum foil surface of the small, vertical or oblique local bulge, one or several smooth grooves.
21. Wrinkle
Aluminum foil roll surface can not be flattened in the longitudinal or transverse wrinkles.
22. Highlights
Aluminum foil double-rolled, the emergence of the uneven surface of aluminum foil shiny point is called the bright spot.
23. Arrows (bird's nest)
A certain number of layers on the end of the aluminum foil roll in the same place from the inside to the outside of the bulge, the degree of protrusion from the inside out or from outside to inside gradually weakened.
24. Black lines
Aluminum foil surface longitudinal continuous dark lines, resulting in parts and other parts of the color difference is obvious.
25. Bright line
And dark lines similar to the bright line is the aluminum foil surface of the vertical continuous bright strip, resulting in parts and other parts of the color difference is obvious.
26. From the drum
Aluminum foil surface longitudinal strip was raised, the hand touch a significant sense of convex and concave, and sometimes to remove the outer aluminum foil disappeared, and sometimes through the entire volume of aluminum foil.
27. Dark surface color difference
Aluminum foil surface longitudinal strip was raised, the hand touch a significant sense of convex and concave, and sometimes to remove the outer aluminum foil disappeared, and sometimes through the entire volume of aluminum foil.
28. stripes
Aluminum foil surface regular fine stripes, generally white, no concavity, sometimes in the membrane part, sometimes covered with the entire surface, also affect the appearance.
29. herringbone pattern
Foil surface appears regular herringbone pattern, generally white, the surface has a clear color, but very smooth.
30. Airway
Due to the high hydrogen content of the melt, resulting in aluminum rolling in the rolling process along the direction of the strip crushing, a certain width.
31. Scratch
Due to the material between the ridge and the surface, or surface-to-surface contact occurs after sliding relative to the foil surface caused by the bundle (or group) distribution of scars.
32. Scratch
Foil surface appears intermittent or continuous groove-like scars. Generally in sharp objects and foil surface contact after sliding relative to produce.
33. Non-metallic press-fit
Non-metallic inclusions into the foil surface, the surface was obvious point-like or long yellow-black defects, this can be more clearly seen.
34. Open seam
Aluminum foil after rolling along the vertical natural cracking phenomenon.
35. Roll eye
Aluminum foil surface of the periodic rolling traces of small holes, and some were mesh, the size is generally greater than the pinhole.