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Thermal Profiler Shield

Views: 1956


GEB

#41925

Thermal Profiler Shield | 1 June, 2006

I'm based in the UK and need a new thermally protective case for my SlimKIC. We are running lead-free now and I'm concerned about the extra heat damaging my SlimKIC. I've been quoted �525 for a stainless steel Lead-free compatible case (KIC-1001), which sounds a bit expensive for what it is.

Any suggestions for other suppliers or other ways to protect the SlimKIC would be appreciated.

Thank you.

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#41927

Thermal Profiler Shield | 1 June, 2006

Another nuisance with the new SlimKIC - even for Sn-Pb paste we run a little hotter peak temperatures - you can't run another one in succession because the "internal" temperature is too high as well. Typically, I have to put the unit underneath a fan to cool it off, but it still takes 8-10 minutes. Not good when you're trying to sneak profiles in whilst the hourlies are at lunch or on break.

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marc

#41930

Thermal Profiler Shield | 1 June, 2006

All data loggers will be warmer at the higher lead free temps. Only two ways around this... better thermal barriers or fans after the profile to cool it down. Some places do not allow fans on the production floor due to static electricity, in that case everything gets laid on the cool floor.

For thermal barriers you can get from your supplier of choice or make one. A metal sheild box will block / absorb the heat energy, high temp insulation casing, etc...

No matter what your data logger choice is, make sure it is at / near room temp along with your board before you profile.

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#41931

Thermal Profiler Shield | 1 June, 2006

Our MOLE was the same way. Setting it on the floor was the best way to cool it down.

I'm not sure you're ever going to do much better than a factory shielding box unless you just build a bigger one and put the whole thing in it...profiler and factory box as well.

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GEB

#41932

Thermal Profiler Shield | 1 June, 2006

Ok, thank you. I want to reduce the maximum temperature that the profiler reaches. I reckon that I need to get a shielding box for it. Can anyone recommend a shield that is cheaper from a UK supplier. �525 from KIC's distributor is too expensive.

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ratsalad

#41933

Thermal Profiler Shield | 1 June, 2006

I sewed a sock out of a Nomex/Kevlar blend fabric because we had the same problem with our profiler. It works great. After one run through the reflow oven, the internal temp rises by about 5 degrees C. It used to go up by about 20-25 C. I can pick up the profiler (in the sock) with my bare hands straight out of the reflow oven.

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GEB

#41934

Thermal Profiler Shield | 1 June, 2006

Where would i get some of that stuff from? How much is it?

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ratsalad

#41935

Thermal Profiler Shield | 1 June, 2006

I got it from McMaster-Carr. http://www.mcmaster.com/ They have just about everything you could ever want, but I don't know about delivery to the UK. I think it cost about $40, or about 30 Euros, or about 20 British pounds. The dollar really isn't worth a whole lot, is it?

You should be able to find it without too much trouble. You want "aramid fabric" in a fairly tight weave, and some thread to go with it. Kevlar and Nomex are both aramids. Either will withstand reflow temps.

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kris

#41938

Thermal Profiler Shield | 1 June, 2006

can you please post a picture of the sock ?

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ratsalad

#41940

Thermal Profiler Shield | 1 June, 2006

Send an email to cuculi54986@yahoo.com and I'll respond with a picture. If anyone else wants one, please let me know

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#41943

Thermal Profiler Shield | 1 June, 2006

Hi,

I spoke to Kic about this at the Apex show in Feb. They told me it was OK to use the Orange Monkey Fur box for lead free. I even asked about my old side kic and they said it was OK also. I guess it depends on how high your temps are. I agree that the stainless steel cover is high priced. ECD Silver Mole used to use the orange silicone cover and it protected well.

Chris

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GEB

#41952

Thermal Profiler Shield | 2 June, 2006

Found the aramid fabric (Kevlar) on the website you suggested. Which thickness Aramid-and-Fiberglass Sheeting should I get, do I need to buy a strip as well to protect up to 600F? I was going to use PTFE-Coated Fiberglass Thread as it is rated up to 1000F, is that suitable?

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ratsalad

#41955

Thermal Profiler Shield | 2 June, 2006

I used 1' of McMaster part # 8821K6 (0.110" thick). It is rated to 600F. I believe I put four layers over my profiler but I'd recommend starting with two. If you need more you can add it. Make the sock good and tight because the fabric seems to have molded itself to the shape of our profiler housing.

We had some PTFE-coated quartz thread in house for another application, so that's what I used. The PTFE-coated fiberglass thread should work just as well.

I responded to your email with pictures.

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