We have a load of lampshades which are made from loops of metal with (I
think) plastic inside - like little portholes.

http://s817.photobucket.com/user/Lit...trange%20bits/
Lampshade%20Soldering/Lampshade.jpg.html

As far as I can tell all the circles of different sizes are soldered
together, then the ring to fit onto the light fitting is soldered on with
three little wire arms.

One of these wire arms has become detached from the ring.

I am attempting to solder it back, but not doing too well.

My biggest soldering iron is 45W but this doesn't seem to be able to get
enough heat in to solder to the ring. It will melt the solder on the wire,
but that won't stick to the much large expanse of metal. I've tried
heating the ring from the back in the hope that the solder will flow, but
nothing.

Next up in the power stakes is my pen torch (gas powered).

https://www.amazon.co.uk/Pencil-Buta.../dp/B004K7ME5S

This seems to be a bit too powerful. Certainly hot. Solder just blows away
in the flame as far as I can tell.

So how do the manufacturers make these things?

Is there something in between (perhaps 60W or more) which will give enough
local heat or am I scuppered because the ring part conducts the heat away
too quickly?

Is there an alternative such as an adhesive which might work? Tiny bit of
body filler perhaps?

Cheers


Dave R

--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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