Brian and others
Whilst I do not challenge the validity of your remarks, the fact is that
this type of soldering could be far more energy efficient than conventional
means especially with regard to lead-free processes. The trick is to
minimise the utilisation of these fluids that can be achieved by the
patented approach of ECM / Garidel.
This solution (pardon the pun) involves the use of a vacuum pump after the
soldering cycle that permits the evacuation of the solvent from the
soldering chamber and, via filtration, to be re-utilised over again. To
support these claims, there are installed systems that have consumed less
than 5 litres in one year of production at a cost of less than $2dollars
(US) per hour vs >$15(US) per hour for nitrogen inerted methods (this
includes capital amortisation).
On a personal note, I consider that this is an extremely viable option for
many high-rel, safety critical applications and very probably an attractive
approach for many high volume producers.
If anyone wants more info, let me know off-line
--
Regards Graham Naisbitt
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Concoat Limited - Engineering Reliability in Electronics
A British Manufacturer
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On 22/12/04 3:23 pm, "Brian Ellis" <[log in to unmask]> wrote:
> I like vapour phase soldering as an elegant system but, before
> committing yourself, be aware that there is a hefty environmental price
> to pay. The fluids used are perfluorinated hydrocarbons and derivatives.
> These are classed under the heading of perfluorocarbons or PFCs. PFCs,
> along with sulfur hexafluoride, are the worst vapours/gases known to man
> as greenhouse gases and have a GWP some tens of thousand times higher
> than carbon dioxide. Even worse, they have an atmospheric residence time
> of over 10,000 years, This means that if you lose 1 kg of the stuff,
> there could still be 400 - 500 g floating around in the air when your
> 400 x great-grandchildren are around (assuming man survives that length
> of time).
>
> PFCs are also controlled substances under the Kyoto Protocol.
>
> Then, of course, they are horrendously expensive.
>
> Don't think this won't affect you. VP soldering is fine for plane
> surfaces, but on electronics assemblies, some of the vapour is
> ineluctably captured under components, in coil windings etc. It may take
> hours before this vapour is emitted and each gram lost that way will
> cost you a sizable fraction of a dollar, despite what the machine makers
> may say.
>
> Brian
>
> Zweigart, Siegmund wrote:
>> Hello all
>>
>> Who knows companies around the world selling vapor phase soldering systems
>> and can tell me the internet link?
>> I am looking for in line as well as for batch systems.
>>
>> Best regards
>>
>> SiggiT
>>
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