How does this get molded?

[William Wonkum]

Hello, I'm new to this forum and new to injection molding in general. I had a question about this type of product in this image:

What would the mold for this look like? I'm just trying to get my head around it, how the different mold parts would pull off. It is "hollow", it lets water pass through, acting as an adapter for two pipes, providing a female threaded connection at one end, and a male threaded connection at the other. Any images you can send of molds or sketches or diagrams will be greatly helpful. Thank you.

 

[Ganesh Moorthi]

Hi William, To my knowledge,
The external thread (Male thread) is formed by splitting it into half between core and cavity. Whereas, the internal thread needs to be formed using unscrewing mold with special Rack and Pinion mechanism from side core. Check for unscrew mold videos in Youtube !

 

[GarethW]

I agree with Ganesh. You can also see a bit of flash/sharpness around the lower diameter. This is a telltale sign of the split-line between the unscrewing (lower) core and the main core/cavity that come from both sides of the part.