4
Pro tip: Swapping from a standard 3-inch riser to a 1.5-inch on our main pour line cut our scrap rate from 8% to under 2% in a month.
The shorter drop reduced turbulence and air entrapment so much that our foreman said the X-ray results looked like a different shop's work, so has anyone else found a sweet spot for riser height on thin-wall ductile iron castings?
2 comments
Log in to join the discussion
Log In2 Comments
claire9589d ago
That's a huge drop, makes you wonder if the first setup was just way off to begin with. Hard to believe a couple inches makes that big a difference.
8
jesse_west9d ago
My buddy's shop had a similar thing happen with their risers on some pump housings. They kept fighting porosity until some old timer told them to try dropping the height by half. The change was so obvious they could see the difference in the castings before they even got to X-ray. It's wild how something that simple can fix a problem everyone was overthinking.
1