Dear Mr.Aphichart
My suspected root cause.
This gating design is very wide and thick and solidly structured.
So when the hammering process (remove gating process),
If operator didn’t care about appropriate procedure,
It may cause, an excess force load up onto the oil filter flange
and that flange might be bended.We have understood this problem at the start of production.
Although we have appropriate WI , one day accidentally or rookie operator mistake to that method and he hit the gate form fix-mold side, the product will be bended.
That is our mistake but we have no any checking aid that is to say any process assurance fixture for this problem. We are going to make this fixture within this week and start
process assurance.For preventive of occurrence and stability, we have 2 kind of
idea.
1. modify mold and add machining allowance
2. make new trimming press and install
but trimming press might be bring new problem.
ex;
mold set up time increase
scratching defect
So we are still hesitating about this action.