Internal undercut mold design – internal sliders and lifters
There are lots of parts which has internal undercut, specialized for phone frame. Here is one case for reference how do make mold making for mold release.
1. Part structure
2. Mold structure
The green colors are internal sliders, and there are internal undercut in four corners. The blue color is internal lifters.
3. Mold open
1st, the internal sliders move out. Part is injected by lifters at last.
It is very simple part, but it is good for reference. All complex comes from simple.