Tried a new sand mix at our plant in Toledo and it went real bad

Honestly, we swapped to a different binder ratio, 2.5% instead of our usual 3%, thinking it would save cash on a big run of gray iron housings. The cores came out way too weak and we had a ton of breakage before the pour even started. Ngl, cost us half a day and a bunch of material to switch back. Anyone else have a binder mix that just completely failed on them?

2 comments

2 Comments

the_miles13d ago

That binder ratio change is a classic trap. We tried something similar years back with a resin system, cutting it by half a percent to save on a big job. Ended up with cores that crumbled when you looked at them wrong. Had to scrap the whole batch and remix at the old formula. Sometimes the standard mix is the standard for a reason.

james66113d ago

Come on, a half percent wrecked the whole batch? That seems a bit extreme. Maybe their mix was already right on the edge before they even started.