c/foundry-workers

PSA: A dab of anti-seize on the threads of your pouring shank really does help

I mean, I fought with a stuck one for like 45 minutes last week before our old timer told me to try it, and it came apart clean the next day. Anyone else got a simple trick for keeping tools from seizing up in the heat?

Started using a cheap laser thermometer to check ladle temps

We were getting cold shuts on some medium sized gear castings, and my buddy said to try a $40 one from the hardware store. Spot checking the ladle lip before each pour cut our scrap rate by half last month. Anyone else use something simple that fixed a big issue?

We had a core shift on a 500 lb ductile iron casting last Thursday.

The cope half moved maybe a quarter inch in the flask before we poured. What's the best way to check flask alignment before you start, besides just eyeballing it?

Just read that some old school foundries in Pittsburgh used to pour iron at 2800 degrees without modern safety gear

I found this in a local history book at the library, and it made me think about how we rely so much on gear now. Is all the new safety stuff really making us better workers, or just more careful?

Changed my mind about using a wet rag to cool a mold

I was in a rush on a small bronze pour last week and hit the sand mold with a damp cloth to speed things up, which I've seen old timers do. It cracked the mold face and ruined the piece, so I guess that 'trick' only works on certain mixes. Anyone know the exact sand-to-water ratio where this stops being a good idea?

Back when I started, the shop gave me a choice: learn the old manual sand rammer or go straight to the new vibratory table

This was about 15 years ago at the place in Toledo. I picked the rammer, thinking it would make me a better molder. It was hard work, my arms were sore for a month, but it taught me how to really feel for a solid mold. Now, with everything automated, I see new guys who don't get why a mold can fail if the sand isn't packed right. Does anyone who learned on the old gear still use those tricks even with the new machines?

Our old sand reclaimer gave out during the Tuesday night shift

It was a total mess, with the whole system backing up and stopping the line for two hours. We had to rig a temporary fix with some spare ductwork and a shop vac to get through the order. Anyone have a good source for replacement parts for a 2015 model?

Old timer in Toledo told me to always pour on a count, never by eye

I was working a night shift at the iron foundry here about six months back, pouring a small run of gear blanks. This guy, Frank, who's been there since the 80s, watched me for a minute from the catwalk. He came down, pointed at my ladle, and said, 'Kid, you're guessing. You gotta pour for a three-count, every time. The metal doesn't lie, but your eyes will.' I switched to his method and my scrap rate dropped by half almost immediately. Anyone else have a simple trick from a veteran that just flat-out worked?

Heard a guy at the break table say all green sand is basically the same

I was grabbing coffee yesterday and overheard two guys from the core room talking. One said, 'You can buy the cheap stuff, it all does the same job.' That stuck with me because last year we had a big run of castings with bad surface finish. We switched from a generic green sand mix to a specific brand with better bentonite, and our scrap rate dropped by 15 percent. It's not just dirt, the mix really matters. What's the biggest quality jump you've seen from changing your sand?

Appreciation post: That one stubborn core print on the big gearbox job

Spent 14 hours over two days chasing a 0.005 inch mismatch because the damn core kept shifting in the drag. Anyone have a foolproof trick for locking down a tall, skinny core print in green sand?

PSA: Switched to a new sand mix for our greensand molds about 6 months ago

We were getting a lot of surface defects on our castings, maybe one in five had to be reworked. Our supplier in Toledo suggested we try their 85/15 blend with a finer base sand. The difference was clear after the first week... way fewer gas holes and the finish is smoother. Anyone else have luck with a specific sand mix for aluminum work?

Just found out my cheap knock-off pouring shank cost me a full crucible

I mean, I lost about $400 in metal and a whole morning's work because the threads gave out halfway through a pour. Anyone know a good brand for 6061 aluminum work that won't fail like that?

A chat with the old timer on break about pouring speed

I was having coffee with Frank, the guy who's been here since the 80s, and I was complaining about some surface flaws on a batch of bronze bushings. I said I thought our furnace temp was off. He just shook his head and said, 'Kid, it's not the heat, it's the hurry. You're pouring too fast, trying to beat the clock. Let the metal find its way into the mold.' I've been rushing pours for years, thinking speed was key. But after he said that, I slowed down my next pour by maybe 15 seconds, just letting it feed steady. The part came out cleaner, with way less turbulence marks. It's a small thing, but it changed how I see the whole rhythm of the job. Has anyone else had an old hand give you a simple tip that fixed a problem you were overthinking?

Had to choose between a new $1200 sand reclaimer or just buying new sand every month. Went with the reclaimer and it's already clogged twice.

I thought the new ceramic foam filters were just a gimmick

Our supplier pushed them hard, saying they cut down on inclusions in our iron castings. I was sure our old method was fine, but we ran a test on a batch of 50 manhole covers. The scrap rate dropped from about 8% to under 2% on that run. The metal just looked cleaner coming out of the furnace. Has anyone else seen results this good, or did we just get lucky?

Update: I tried a 50/50 mix of old sand and new for a core mold last week.

Everyone at our shop in Cincinnati says to always use fresh sand for cores, no question. I had a small job and thought I'd save a bit by mixing in half of our cleaned, reclaimed stuff. The core looked fine going in, but it crumbled during the pour and ruined the piece. I learned that for cores, the bond strength is just too critical to mess with, even if the sand looks clean. Has anyone else found a way to safely reuse sand for core work, or is fresh really the only way to go?

Warning: a new guy at our shop in Toledo tried to pour a big bronze casting without a proper choke last week.

He set up the gating system with just a sprue and a runner, thinking it would fill fine. The metal came in too fast, caused a lot of turbulence and slag got trapped. We ended up with a major defect right in a critical section. Now the foreman wants us all to go back to using chokes on anything over 50 pounds, but some of the older guys say it just slows the line down. What's your shop's rule on this?

Vent: The old sand mixer at the Tacoma plant finally gave out last week

Three years ago, that thing was running every shift, mixing green sand for the whole molding line. Last month, the motor started making this grinding noise that just got worse. On Friday afternoon, it seized up completely, and we had to shut down Bay 3 for two hours. The new automated unit they brought in is faster, but it doesn't have that same feel. Anyone else miss the old manual controls on the equipment?

Rant: Our whole crew got sent home early Friday after the furnace refractory lining failed for the second time this month.

The foreman said we burned through the patch job from two weeks ago in under 80 hours because the mix was too wet going in... anyone have a good refractory contractor near Toledo they trust?

PSA: The $350 I dropped on a proper respirator setup was the best money I ever spent.

I used to just use the basic paper masks for years, thinking it was fine for the quick pours and cleanup. Then last fall, I was doing a long run of brass castings and the smoke was just hanging in the air. I got this nasty headache that lasted two days, and my throat felt raw. My wife finally made me go to the hardware store and get a real half-face respirator with the pink pancake filters. It felt weird at first, like I was breathing through a straw, but you get used to it. Now I wear it for anything hotter than aluminum, and I haven't had a cough or headache from work since. What do you guys use for heavy smoke days? Are the powered air systems worth looking into, or is a good respirator enough?

The week our sand system went down and we had to pour molds by hand

That was a real mess, let me tell you. Our main sand muller broke on a Tuesday morning, and the part was going to take four days to get here from Ohio. We had a huge order of gray iron brackets for a factory in Detroit that couldn't wait. So, the boss said we had to mix and ram all the sand by hand, just like the old days. My arms were killing me by noon, and we only got about half our normal work done. The worst part was the consistency was all over the place, and we had a bunch of molds wash out during the pour. I think we scrapped maybe thirty castings that week. Has anyone else had to go back to manual sand prep for a big job, and how did you keep the quality up?

Bought a 'high heat' tape for a core box repair that melted into a $45 puddle in about 90 seconds.

What do you all actually use for quick patching that can handle a real pour?

Showerthought: I used to think our old sand reclaimer was a money pit

I was complaining about the constant maintenance on our Palmer unit to a guy from the foundry over in Canton last week. He said they ran theirs for 15 years and the key was just cleaning the fluidizing deck every single Friday, no matter what. We started doing that exact thing, and after a month, our new sand yield is up a solid 5%. It's not broken, I was just lazy. How often do you all clean your reclaimer guts?

Just realized I've poured exactly 10,000 molds on our old Disamatic line

I was cleaning out my locker and found my old shift logs from when I started. Did the math, and it came to that round number. It hit me that I know every single sound that machine makes when it's happy or about to jam. Anyone else have a piece of equipment they feel like they've become part of?

I thought the old-timer's trick of using a potato to stop a core box leak was a joke until my foreman in Toledo actually did it during a pour last Thursday.

Has anyone else actually had to use a weird kitchen item to fix something on the floor, or was our shop just that desperate?