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...aaaaaand the lid has a frame

A project log for vapsy

A tiny vapor phase reflow oven

christophChristoph 09/14/2015 at 11:344 Comments

I cut the U-shaped aluminium to make a frame:

Cleaned all parts, applied silicone, and assembled:

I made sure to fill the gaps between the aluminium parts and then removed excess silicone as the side that is visible in the picture will be the bottom, facing the reflow chamber.

Discussions

Alex Rich wrote 09/14/2015 at 12:46 point

Looks good, you may want to put a safety pressure relief valve on this box - explosions through glass hurt!  I saw you are planning something to compensate for pressure but I would stick a safety valve on there anyway that will blow at a couple psi or something.

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Christoph wrote 09/14/2015 at 12:50 point

Yes, there's a connection to the atmosphere at the galden chiller's outlet. The lid will also be just placed on the chamber without any clamp until I come with something more elegant - but thanks for pointing this out! Feels good to see someone really follow the project.

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Alex Rich wrote 09/14/2015 at 13:03 point

ok good idea, I thought for a second this would be a sort of pressure cooker.  It is probably possible to design a glass window to withstand pressure/heat but I would be scared to look into it.

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Christoph wrote 09/14/2015 at 13:07 point

Can't create another level of nesting, unfortunately...

no, higher pressure would probably mean a higher galden boiling point,
if the galden behaves like other common fluids such as water. I wish I
had more data on that, but the datasheets don't even specify the density
of galden vapor at 1 bar. I'll write a bit more on thermodynamics later, when I'm implementing the control loop for this thing.

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