pat781•18d ago

Switched from the old green sand mix to a new binder from a shop in Toledo and the difference is crazy.

We were getting a ton of gas holes in our gray iron castings, maybe one in five were scrap. The new binder cut that down to maybe one in twenty, and the surface finish is way smoother. Has anyone else tried a different binder system recently and seen a big drop in defects?

4 comments

4 Comments

aaron85418d ago

Wish I could say the same... we switched to a fancy new binder last year and my scrap rate went the other way. Spent six months chasing our tails before we just went crawling back to the old supplier.

mianelson18d ago

Ugh, my buddy's shop did the same thing with some "upgraded" coolant. Total mess. They lost a whole contract before switching back.

karencampbell17d ago

Yeah, that's the worst. @aaron854, you gotta get a sample run written into the next contract. Let them prove it works on your machines before you buy a whole batch.

shane_clark3d ago

Man, I know that feeling... we had a similar win with a resin change a while back. Went from a standard phenolic to this low-nitrogen one from a place in Indiana. The reduction in pinholes in our ductile iron was night and day, like you said. It felt like we were just burning money before that.