BUILDING YOUR OWN REFLOW OVEN

September 13, 2013 in REFLOW SOLDERING

Until now we have talked about using standard toaster ovens to build reflow ovens, but if you have a little experience in building things and you have some equipment you can build one from scratch.

Mine is not really good looking but it works really well:

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I don’t intend to do a tutorial on how to build an oven but this can give you some ideas.

We have build one using the following components:

- MakerBeam beams and brackets for the structure. Check them in www.makebeam.eu, they are perfect for building modular structures.

- Aluminum sheets of 0.75mm. They are easy to fold and cut so they are perfect for making the “skin” of your oven. My recommendation would be to use this cutting circular saw you can attach to Dremel mini-drill, see photo.

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- Heating infrared lamps. I have used Osram Halotherm lamps, in my case 5 pieces, 200W each. I will probably add 3 more as the power is quite low when using a fan for heat distribution, see my previous post about this issue.

- Holders for infrared lamps.

- A piece heat resistant glass to make the window of the oven. In my case I used Neoceram glass which is perfectly good for more than 300ºC.

- Various Electrical materials (cables, connectors, isolation tape…etc).

- Aluminum sticking tape. Ideal for closing gaps in your structure once made. You should use the one that can withstand 250ºC at least.

- Fire stop Mastic, I have used the one from Sika “FireStop”. You can also use heat resistant Silicone, I have used Sika “Firesil-90″. The heat resistant silicone is easier to handle and it is a little bit flexible but it is good only for temperatures below 300°C, the heat resitant mastic can withstand higher temperatures (1000°C).

First thing would be to mount the oven top structure, this is where lamps are mounted. I definitely recommend Makerbeam for building the structure, it is really easy to use and you change it as many times as you want. The initial structure look like this:

foto estructura superior_lowNext thing is to prepare the lateral closing panels that will support the lamps in place.

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Next would be to install the laterals.

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You can use the heat resistant mastic to close the gaps between the aluminum parts:

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I also added a lid that acts as an isolator limiting the heat loss and reducing the danger of burning yourself.

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Mount the lid over the lamp support structure and close the gaps with the aluminum tape.

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So the top side is finished. The lower side structure is also built using Makerbeam profiles.

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This part includes all the electronics: controller, solid state relays, an oven fan for distributing the heat…etc. All is below the oven to save some space.

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Put the two parts together, install the lamps in the holders and the oven is ready.

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Here you can see the lamps mounted on their holders.

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There is a new post about building a reflow oven, see it HERE.