Yeah, I'm pretty handy. I'm not looking forward to finding a new job though. Getting this one wasn't a pleasant experience, and I don't hate this job. I think I actually like it.. Is that possible? It suites me well right now. It's not hard(diffrence between not hard and fun...), I get to ride my bike to work, the hours are just right for me(swing.. 2:30pm to 11:30pm).. And best of all, all the supervisors and "big" people go home at 2:30 - 3:30
But the pay sucks. If I could be making more than 7.70 doing something I actually enjoy doing(making molds out of silicon rubber isn't exactly the most exciting thing on the planet)
I work for
ZMAN Magnetics, making molds for their line of
Miniature High-Voltage transformers. Each one of those parts has a diffrent mold. After they wind the core, each part is put into a mold. A machine called the MOOV machine(ancient thing.. To "program" it, you insert diffrent long cards with old, 70's looking circuits on them, into slots. Anyway, hehe.. The machine pours just the right ammount of epoxy into the mold. The mold serves 2 purposes. 1) to encapsulate the core, wires, etc. in epoxy, and 2) to bring the part to certain tolerances(typically +/- .025 - .075, depending on the part). The molds have to be perfectly level.. If they aren't, then the epoxy will run to the low side.. making the parts there too high(thick). Then, of course, the other side will produce parts that are too low.
It's quite a process to make the molds. Each part/mold has a "master mold" which is, obviously, the opposite of the mold. Looks kinda like a waffle iron, only round..heh, anyway.. They have these aluminum rings that clip around the master mold, forming walls(The molds are circle).
You then have to make your silicon rubber. It's a two part mixture, 10:1 ratio. So you measure out 1.5500lbs of your very thick, white, base, using a ladle to pour it into your small bucket(which is on a scale). And then you pour in .15500lbs of your extremely runny, blue, catalyst. You then cheerfully, because you got the ratio perfect(+/- .0010lbs), walk over to the small drillpress, and mix your goop up. Gotta make sure to get the sides and bottom good, grin.. Then you go over to the vacuum chamber, put your bucket of goop in it, turn the pump on(after closing the lid...) and wait for 5 minutes. If you can't figure it out, this gets all the air bubbles out of it. As a fun note, you have to watch it with a flashlight through a little peephole, to make sure it doesen't "boil" over. There's a lot of air in it from mixing it up, and when you first turn it on, it all tries to come out, making it rise. If it rises over the edge of the bucket.. It's quite a mess. :Q After a few big bubbles, it settles down, and you go begin the process on another mold. Heh.
After its de-aired, you spray your master mold down good with release(oily stuff in a spraycan), then you pour the silicon into the mold master, and put it into the vacuum chamber. Another 5 minutes, and it comes out. See, the top of the mold that you see after you pour it, is really the bottom when its done. It's the part it sits on, so its the part that has to be perfectly level. So you have to put a perfectly flat steel plate onto the mold and press down, making the goop ooze up onto the plate.. There are pins around the circumference of the mold, and you push the plate down until it hits these. Then you place a 15lb weight on the top, and put it into a 160F oven for 1 hour. You then take the mold off the master(which is generally pretty easy, assuming you sprayed it.. If you don't spray it, you can't get it off, and it's 2500$ and a months work down the crapper. ;Q(I kinda wonder if he was just trying to scare me with the "month" figure.. It couldn't really take that long for someone to machine one of them.... could it? ) Then you start the whole process over again. I make about 20 molds a day at full capacity. But since it's been slow lately, the molds haven't been being used, so they don't go bad.. Which means we reach maximum stock on each mold(20 to 140 depending on the part/mold), which means I don't have a job, grin.
So they trained me how to test all their parts. Using oscilliscopes, volt meters, big, 80s looking inductance meters, HiPot testers, and other gadgets. I'm glad I've been busy in the MOOV room the last couple weeks, because testing was REALLY boring. You'd test 800-2000 parts a night.. Ugh.
Yes, I'm bored.