Silicone cover for E3D V6 hotend

by Srek, published

Silicone cover for E3D V6 hotend by Srek Dec 3, 2015
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Simple mold for a silicone cover for the E3D v6 hotend.
The outer part of the mold is one time use only, since you will very likely destroy it when extracting the cover.
Make sure to only use a low density infill to make this easier (<=20%).
If possible prepare the mold with PTFE spray or other separation agents for easier extraction, in worst case you can do without though.
You will need 7-8 g of heat resistent silicone.

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Make sure to clean out the overhang of the inner part of the mold. Any residual strings will make extraction more difficult.

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What sort of silicone do you recommend, the type I am using isnt setting as the mold is reasonably air tight. Are you using an addition cured/two part mix silicone?

Tin casting Silicone doesn't need air to cure, it is a two component material. If you use correct measurements it will cure under basically all circumstances. Low temperatures will prolong curing, higher ones will speed it up.
The High Temnp silicone i use
cures in about 2 h at roomtemperature and in 1:20h @ 100°C
If for some reason you want to use the high temperature silicone glue you get in the diy market you will need to expose it to air throughly before molding. It will stick to the surface of the mold very tightly so make sure to use PTFE spray or vaseline as a separation agent.
I would heavily recommend using the two component stuff that is meant for molding, it has a much higher viscosity.