High temp heated bed insulation
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I'm looking for some insulation for a high temp heated bed. Must be able to withstand >250C. I see that melamine foam, welding mats, cork, etc. are recommended in the reprap wiki. My main thing is that it needs to be non conductive. Thickness is not critical.
For the welding mats, they are cheap on amazon, but I'm not sure of the conductivity. Seeing as they are carbon felt I am assuming that they are conductive. The fiberglass mats seem too thin to really do anything.
I've also found some ceramic fiber insulation and rockwool insulation. The ceramic fiber seems the most promising so far.
Any recommendations here? I'm leaning towards the ceramic fiber, but not sure if that's going to release a bunch of bad particles and crap into the air that I don't want to be breathing in.
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I use a ceramic mat wrapped in aluminum foil. Up to 240°C current, you can insulate it with kapton tape.
The mats are used in ovens or for heating fireplaces, so should not pose a health problem. -
@Surgikill I use boards designed for underfloor heating for my bed because I wanted something semi rigid that wouldn't need much in the way of support. They are a sort of compressed fibre with a thin layer of fibreglass either side but I don't know if they would be good for 250 Deg C - you'd have to check. They are 6mm thick and I use 2 layers. I've also used ceramic fibre to separate heat zones on one of my experimental hot ends. It will definitely be good for 250 Deg C but you'll have to put support underneath it.
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@Surgikill
temperature rating deg C
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@Surgikill, I have to ask .... why would you need/want insulation for a bed that is good to 250C? What are you printing on this bed? What do you use for a heater that is good to that temperature?
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@jens55 e3d high temp heated bed. The bed is rated to operate at that temperature and is thermal fused at that temperature, so I need insulation that can withstand that temperature.
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@Surgikill said in High temp heated bed insulation:
@jens55 e3d high temp heated bed. The bed is rated to operate at that temperature and is thermal fused at that temperature, so I need insulation that can withstand that temperature.
And where would you put this insulation?
Frederick
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@fcwilt underneath the bed heater in direct contact with it. Will help with power consumption and excess heat in my workshop room.
