Yep, the press is "something" like that, operates on the same principle. The other side "must" be upset to some extend other wise when you solder from other side the rivet would fall out same as a wire inserted thru hole. The rivet needs to be upset sufficient to hold in place while soldering.
Does that make sense?
ken H>
--- In Homebrew_PCBs@yahoogroups.com, Donald H Locker <dhlocker@...> wrote:
>
> You wouldn't _have_ to upset the rivet. Insert rivet, solder head side, invert board, solder tails, pick up rivets whose heads weren't soldered, repeat. I do know that you wouldn't get the stability that the double head would give you doing this, but it might be OK for low volume, non-critical boards. For volume or critical, THP is the only way to go.
>
> I was surprised at the size of the head of those 0.4mm rivets. I wouldn't have thought that much head was necessary or desirable. But I don't know anything about this process.
>
> Donald.
> ----- "Philip Pemberton" <ygroups@...> wrote:
>
> > sailingto wrote:
> > > Phil, I have used rivets very similar to those in the .8mm size.
> > The
> > > tool I have is a Panapress with the punches - they work nice
> > indeed.
> > > High density would be a problem. My use is normally for via from
> > one
> > > side of board to other and my boards are NOT dense.
> >
> > I take it you mean something more like this?
> >
> > http://www.megauk.com/through_hole_rivets.php
> >
> > The drill sizes seem a little more reasonable (0.8mm rivet needs 1.0mm
> >
> > hole, and there's a 0.4->0.6mm rivet for finer pitch work), as do the
> >
> > prices (about £25 for a pack of a thousand rivets, about 1/10th of the
> >
> > price of the CIF parts). Problem is the tooling is much more
> > expensive... £250 for the press, then £91 for each die set (one
> > required
> > for each size). Ugh.
> >
> > Think I'll stick with wire-wrap wire, the 0.5mm drill bit and a needle
> >
> > file for now...
> >
> > --
> > Phil.
> > ygroups@...
> > http://www.philpem.me.uk/
> >
>