Horeki
29th July 2020, 07:49 AM
Hi everyone!
Im ruling right now a very large thin wall IML project, the process is stable right now with scrap rates of 0.75%, and everything it's going well, but after a few days of non stop 24/7 production(just stoping every 50k shots for periodical inspection check) I've noticed that a rare cosmetic defect started to apear in some pieces, the piece its not considered scrap since the defect its located on the base of the cup and it's not noticeable from the inside (client approved).
The curious thing is that this defect only appears after more than 100hrs of running non stop, and as sudden as it appear it disappears too and that's why QA just noticed this "little" defect (after more than 2 months of work).
To me it appears like gas or air trapped inside, but it doesn't bulk or adds bumps to the piece.
Anyway, I wonder if anyone has seen something similar to this?
IMG 1 (https://drive.google.com/file/d/1bRAJ7Md_Npu9k8dcHXNdZWifhPI7OdJR/view?usp=sharing)
IMG 2 (https://drive.google.com/file/d/14WAGcsYroac85wxiRKP40MpgQmtJVxi6/view?usp=sharing)
IMG 3 (https://drive.google.com/file/d/1zMSaffnv9LL3Spkkz7_jrzg45zF7ho3M/view?usp=sharing)
IMG 4 (https://drive.google.com/file/d/1ZXyQgcDFxErZ7Kk5Fn3jdPNFXXBvlmVj/view?usp=sharing)
It's only visible from inside if seen against light.
The "failure rate" reported by QA its juts of 0.0048% (7 out of 145k).
Im ruling right now a very large thin wall IML project, the process is stable right now with scrap rates of 0.75%, and everything it's going well, but after a few days of non stop 24/7 production(just stoping every 50k shots for periodical inspection check) I've noticed that a rare cosmetic defect started to apear in some pieces, the piece its not considered scrap since the defect its located on the base of the cup and it's not noticeable from the inside (client approved).
The curious thing is that this defect only appears after more than 100hrs of running non stop, and as sudden as it appear it disappears too and that's why QA just noticed this "little" defect (after more than 2 months of work).
To me it appears like gas or air trapped inside, but it doesn't bulk or adds bumps to the piece.
Anyway, I wonder if anyone has seen something similar to this?
IMG 1 (https://drive.google.com/file/d/1bRAJ7Md_Npu9k8dcHXNdZWifhPI7OdJR/view?usp=sharing)
IMG 2 (https://drive.google.com/file/d/14WAGcsYroac85wxiRKP40MpgQmtJVxi6/view?usp=sharing)
IMG 3 (https://drive.google.com/file/d/1zMSaffnv9LL3Spkkz7_jrzg45zF7ho3M/view?usp=sharing)
IMG 4 (https://drive.google.com/file/d/1ZXyQgcDFxErZ7Kk5Fn3jdPNFXXBvlmVj/view?usp=sharing)
It's only visible from inside if seen against light.
The "failure rate" reported by QA its juts of 0.0048% (7 out of 145k).