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Had to pick between a new sand binder or fixing our old muller
The boss gave me the call yesterday, said we had the budget for one big thing this quarter. It was either a fresh pallet of that fancy phenolic urethane binder everyone's talking about, or a full rebuild kit for our 20 year old Simpson muller. I went with the rebuild, spent all morning swapping out the worn plows and scrapers. The sand mix is way more even now, no more dry pockets. Anyone else ever had to make a call like that between new materials and keeping old gear running?
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wendyk567mo ago
Good call on the rebuild, but I thought phenolic urethane was for cold box cores, not green sand?
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the_jordan7mo ago
Yeah, you're right. It's a total mix-up, they're definitely not for green sand.
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eva_adams687mo ago
That phenolic urethane binder Wendy mentioned is a core room thing, for sure. It goes in those cold box core machines, the ones that use a gas to set it. Green sand molding is a whole different world with clay and water. The_jordan had it right calling it a mix-up. I saw a foundry try to sub one binder for the other once and it was a mess, just a bench full of crumbly cores that wouldn't hold shape.
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