--- In
Homebrew_PCBs@yahoogroups.com, Simao Cardoso <simaocardoso@...> wrote:
>
> On Wed, 2009-06-10 at 14:06 -0400, Lou Holec wrote:
> > Brush Plating is probably using less solution then tank plating.
>
> I guess this thing is to weld plastics, and seem great to do thin tanks,
> since the working space isn't enough. But from the explanation 'a
> voltage is attached between the fixed Heating-Welding-Rod an the
> neighbouring parts' Where is the other connection done? the heating
> resistor has only one wire???
Yes, the connection is to made at the two opposite wires ends.
There is a plastic rod, with the heating wire wrapped around.
Apply tension to the wire connecting both ends of the wire to a
lab psu, wait the time for heating, apply pressure, and waiting for
cooling down. That´s the procedure.
> About chemistry, i am to in a fight between finding the good one to have
> at home, what them are and prices, i think heaven found a way to mix the
> bungard palladium based chemistry (Ethanolamine+PEG;NaCL+HCl;Pd+PVP
> +HCL;K2CO3) at home using palladium bullion coins as source of palladium
> (palladium metal+nitric acid+EG+PVP+ultrasonic stiring or NaOH), but
> isn't more cheaper do it, and is a chemistry that need much rising water
> and a water treatment system. After various readings i am now more in
> the wish if a simplified version other german chemistry (polythiophene
> based) will work, just the permanganate desmear and a PVP bath as
> activation, since this can be just drain without problems. But i don't
> know if the PVP will just bond to the MnO2 treated resin.
>
> My question: how will you Chris treat your rising water?
For the polymer based solution, i have tested it.
Working with fresh solution is ok, but for now,
i have used chemistry aging issues. Neverless, the cost is 1-2 Euro each operation (Eurocard size) or multiple of it, and for home use,
it´s really attractive.
To return to you´r question.
Vacuum distillation. The only cheap/right way to do it.
I have speaked a lot with water waste threadment companys, that
have experience in pcb production. I have the reactivating procedure for the water threadment resin that bungard sell, but all concord, that the vacuum distillation method is the
best/cheapest. In addition, the resulting concentrate liquid could
be added to the chemistry, and the water reused.
As example, at 25mH, the Water boils at 25 degree.
My working point is 30 degree, with 20-25 degree cooling (water) coil,
without using external compressor or peltier modules.
It´s really simple building such a system.
>
>
> > Hi,
> > i´m building a new pcb plating process line from plain PP sheets and
> > http://www.orbi-tech.de/seiten_englisch/heating_welding_rod.htm .
> > This permit creating the processing chambers with minimal chemistry.
> > I´m located in EU, and if someone need a similar process chamber, mail
> > me.
> > I will order the wires in 2-3 weeks.
> >
> > Regards
> > Chris
>
> >
>