Heat insulation

I'm currently desingning a 3D printer and I wonder how do i make sure that the hotend is properly insulated from the rest of the head. How is it solved in other printers? I was thinking about using fiberglass on the part of the head where the hotend will contact it.

Often a silicone sleave is used to prevent excessive heat emission to other parts of the printhead

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0xDeadbeef
I'm currently desingning a 3D printer and I wonder how do i make sure that the hotend is properly insulated from the rest of the head. How is it solved in other printers? I was thinking about using fiberglass on the part of the head where the hotend will contact it.

Most hot ends consist of two parts - a hot end and a cold end. Confusingly, they are almost invariably called "hot ends" as a collective term for both the hot part and the cold part. The hot part is a heat block, usually made of brass or some other metal that conducts heat well and to which is fitted a heating cartridge. The cold end is usually a heat sink, made from stainless steel or similar metal which does not conduct heat well and which has an integral heat break (generally just a thin wall section) and usually a cooling fan blowing cold air over it but liquid cooling can also be employed.

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It seems i might have misunderstood the question. In my Merlin Hotend PEEK is used as the insulator and heatspreader.

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[merlin-hotend.de]
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