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Old 5th March 2009, 05:59 PM   #1
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Default How to disassemble EI cores?

Can you tell me how to disassemble the transformers found in the computer psu?I need to rewind them to give higher voltages.
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Old 5th March 2009, 06:03 PM   #2
infinia is offline infinia  United States
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Usually glued together, so you need to find replacement cores.
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Old 5th March 2009, 06:42 PM   #3
star882 is offline star882  United States
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Use a heat gun to melt the glue and they will come apart. Let the core cool naturally as trying to cool it fast may crack it.
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Old 5th March 2009, 09:08 PM   #4
infinia is offline infinia  United States
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We used permanent glue if it didn't have clips like ETD style.
IMO transformers using glues that come apart with heat is a waiting disaster from an OEM/distributor point of view.
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Old 5th March 2009, 09:27 PM   #5
star882 is offline star882  United States
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Quote:
Originally posted by infinia
We used permanent glue if it didn't have clips like ETD style.
IMO transformers using glues that come apart with heat is a waiting disaster from an OEM/distributor point of view.
It has to be pretty intense heat to soften the glue. And they are taped together using high temperature tape so they are unlikely to fall apart even if overheated.
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Old 5th March 2009, 10:59 PM   #6
infinia is offline infinia  United States
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Quote:
Originally posted by star882

......high temperature tape so they are unlikely to fall apart even if overheated.

I'll buy that
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Old 5th March 2009, 11:58 PM   #7
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I have a better way!

Put it in really hot watter, wait everything get cold slowly.
When it is just a litle warm, use your hands to disassemble the core.

Easy.
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Old 7th March 2009, 09:58 AM   #8
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Boiling them did the job.Thanks for the advice.
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