High temp coating for plastic, is it possible?

[hybridprinter]

Was wondering if there is any coating that can be put on plastic printed parts to withstand 600 degree plus temperatures?

[jsc]

Unlikely. You might try creating a PLA mold and stuffing it full of JB Weld. You can burn off the PLA afterwards.

[hybridprinter]

Would ceramic coating reflect the heat and protect the plastic underneath from melting?

[ednisley]

Would ceramic coating reflect the heat and protect the plastic underneath from melting?

If that worked, my mug o' green tea wouldn't get nearly so cold...

There's no magic heat "reflector". Insulators work by reducing the conduction of energy (which is where heat comes from) through material contact or increasing the reflection of radiation. Vacuum has really low conduction (thus Thermos bottles) and aluminized mylar is a great reflector (thus survival blankets).

However, if you have an insulator in contact with plastic on the inside and "something hot" (air will suffice) on the outside, heat will flow through the insulator into the plastic. A very good insulator will conduct very little heat, but eventually the insulator and plastic will reach thermal equilibrium with the "something hot".

Example: if you're wrapped up in a survival blanket and sitting on snow, your rump will freeze: a thin layer of reflective plastic conducts heat very well indeed.

On the other paw, deep-fat fried ice cream is a thing, even though dough isn't a great insulator. The trick is to not dilly-dally while the dough fries: you must fish it out before the ice cream melts.

[insta]

If it's a quick thing (like a brief plunge into lead, or use as a temporary injection mold), XTC-3D may work. I'm basing that on squatting down, reaching back, and tugging ... but hey.

[hybridprinter]

Thanks all!