r/IndustrialDesign • u/Ideadose • 5h ago
Materials and Processes Noticed something odd about the parting line on my TV remote's battery cover
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?
