Cupping test (ISO 1520)

[RobLN]

Is anyone familiar with the testing of powder coated components according to the cupping test (ISO 1520) and more importantly the significance of the ?4mm value that I see on the specification sheet for the powder. I can't see why the 4mm should have a ? value. Does this value relate to the ball diameter or the depth to which the ball is forced into the material...? If it is the latter then I can insert the ball to 10mm - 100mm without any issues ?!

Solid Edge; I-Deas 7 to 12; NX4 & currently NX5.

 

[CoryPad]

The [≥] 4 mm is not the ball diameter, it is the depth to which it is pressed when coating cracking or adhesion loss are detected. The 4 mm minimum has been found to meet certain end use requirements, e.g. the coating won't crack/peel/flake when the sheet metal is dented by foreign object collision. I have no idea what you are saying regarding 10 mm to 100 mm.

 

[RobLN]

Thanks for your response. I understand what is being stated now. Much appreciated.

Solid Edge; I-Deas 7 to 12; NX4 & currently NX5.

 

[boothuk]

RobLN,

What specification are you testing for this PC?