Experienced Scrapper
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I used the search bar but couldn't find too much on the following..... Whats a best practice for removing these chips off the boards? Should i just go with a smash technique or what im also thinking is to grind off the connectors and the solder with a rotary tool or something....
Metal Recycling Entrepreneur
if they're pressed in just push a small screwdriver under it and pry up. If they're soldered I think it best to just leave them on, unless you're scrapping the board.
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There's three ways to remove the soldered on chips. Desolder, heat gun, or grind them off. The beat-it-to death-with-a-hammer routine won't do you much good in this case. I don't know how to desolder, and my attempt to use a heat gun only blew up a neighboring capacitor. So I use a Dremel tool with a cut-off wheel. Wear safety glasses and a dust mask if you go that route. And don't purchase a cheap Harbor Freight Chicago brand knock-off rotary tool. They don't last. I found that out the hard way.
The ones that are soldered on the same side where the chip is can be removed with a wood chisel. Make sure you know where both hands are or you can wind up with stitches or scraped knuckles.
I only do this on low grade boards. Removing them from higher grade boards will devalue the boards
Last edited by billygoat; 11-22-2012 at 06:52 PM.
Metal Recycling Entrepreneur
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Originally Posted by PattyScrap
I found this video on stripping IC Chips.
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It depends on the board, if it's a low grade board then I use a 4 1/2" angle grinder and grind the solder on the back of the board. Some people take the IC chips off the green boards or the higher grade boards if they are the type that plug into a socket, my buyer says leave those chips on the board or it will be down graded, but he also pays very well for green boards. I think it will be up to your buyer weather or not to take the IC chips off of high grade boards. Hope this helps.
Metal Recycling Entrepreneur
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What ever you do to get the pins off once you have removed the chip, don't do this...
It may look easy to just hold the chip vertical on its edge, then use a boxcutter knife to cut the pins off one edge, then turn it around 90deg& do the next edge.
Whats going to happen, after a few edges the knife will get blunter, it'll take a bit more energy to cut the pins, then you have to wiggle the knife a little so it cuts thru the first few pins & then it cuts down thru the rest of the pins.
After a few more, it'll grab one of the pins instead of cutting thru it, because you use more force, it'll rotate the chip 90deg.
That'll pull your fingers around the chip (to your right hand side) a bit.
Then with that amount of force, it'll slide down & slice the end off your finger & thumb.
I use a box cutter to remove the chips, I put the board down flat & for every chip I slice one side of pins off the shortest edges (both sides)
Then I turn the board 90deg & scrape a slice down one edge, I don't cut right thru it, just enough that I might cut thru a few pins but scrape all of that edge. ( I do it that way so theres something still attaching the chip to the board when I do the next cut, and it weakens that edge of the chip)
I then turn the board 180deg & then slice thru the pins on their right edge. Sometimes the chip comes off. Most of the time they stay there sqewed around a bit.
Then I go thru & lift the chips 90deg to the board with a screwdriver, still stuck on by the weakened pins.
Then I go thru with pliers or by hand & rip the chips off.
Last edited by eesakiwi; 11-22-2012 at 07:07 PM.
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Who said anything about cutting the legs off? Never heard of it.
Metal Recycling Entrepreneur
all this over a $4 a pound(=about 500 times) chip???
(when the board is bringing almost that anyway?)
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Bear, that's why I said I only take them off low grade boards. My yard only pays 8 cents a pound for them. So anything worth more than that comes off the boards.
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Yup, Billy is right only low grade boards, thats what I said in the above post. Why would anybody take the legs off the chips? I've been getting 5.00 per pound for the chips.
Metal Recycling Entrepreneur
maybe post #2 shoulda mentioned the good ol hammer and chisel tecnique ; )
Metal Recycling Entrepreneur
frankly i don't feel smashing a hundred chips for 4 or 5 bux are worth the time or trouble
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smashing is fun
If I can pry them off low grade boards easily with a screwdriver then they come off. If the first one is difficult then I stop trying with the rest. You'll notice that is the case. Some ics are easy and others are not.
"Easy does it, first things first, do what you can. Believe me, I too have been through the wringer." Bill W.
Metal Recycling Entrepreneur
only profitable if chips are gold
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Heck, I'd rather smash for 4-5 bucks than wrestle with those PITA aluminum heatsinks for 40-45 cents.
Metal Recycling Entrepreneur
haha, i'm not sure which ones you're talking about, but i do know some of those tiny ones, i just leave on there ; )
Metal Recycling Entrepreneur
maybe you missed this one too ; )
Metal Recycling Entrepreneur
i pull cpu heatsinks on the way to the cpu , haha ; )
Metal Recycling Entrepreneur
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Theres no places close to me that buys the chips or boards. There is a escrap place but thats too far away & their prices are rubbish anyway.
By removing the copper legs it makes it easyer to process.
Oh, & if posting that info saves a few people from cutting the end of their fingers off.... Safety first.
I will use a small belt sander to remove the legs.
I just found out that you can reclaim 10gms of gold from 7Kg of flatpacks.
Last edited by eesakiwi; 11-23-2012 at 01:26 AM.
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