u/Ideadose

Not looking for a textbook answer here, more curious what people actually do in practice. Say a part's been running fine at one shop and then gets moved to a different one (same drawings, new vendor). How deep does the requalification usually go for you in that situation?

Full GD&T reverification on the first article is one option. Spot-checking whatever dimensions have burned you before is another, and honestly probably more common than anyone admits. I'm also curious how much people actually trust a new supplier's material certs versus pulling a sample and testing it themselves, and whether any of that changes between a machined part and a molded one.

Mostly trying to get a feel for where people draw the line between reasonable diligence and redoing the whole qualification from scratch every time a part changes hands.

Swapped batteries in my TV remote last night and actually looked inside the battery cover for the first time in probably like ten years. There's a ring of small circular marks pressed into the plastic near the edges, and a thin seam running along the inside that doesn't line up with where the outside seam is.

Did a little reading after and I think the marks are ejector pin marks, and the seam is the parting line. Wasn't what I expected though. I figured the parting line would just run straight through the middle, splitting the cover evenly front to back, but instead it dips into the battery compartment on one side before continuing around.

Anyone here actually work with injection molds? Is there a common reason a parting line would get routed off-center like that instead of straight down the middle?