pssherman
Member
I will be doing tube-in clear casts using the vertical casting system. How long should the molds be left in the pressur pot? How long should I wait to demold (remove nylon and silicone plugs) the casts?
demold time for silmar 41
- Thread starter pssherman
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jttheclockman
Member
I leave over night. Can demold next day.
its_virgil
Member
Like John T, I normally cast in the evening and demoldvtge next morning. Good luck. Be sure to show us your blanks.
Do a good turn daily!
Don
Do a good turn daily!
Don
JohnU
Member
Like Don and JT, I let them cure for 18-20 hours. They will be tacky out of the tank. If they come out real sticky I let them sit for 8-12 hours before removing the tapered plugs. The top plug will be the worst. I often roll it on paper to remove the resin.
pssherman
Member
Do you keep them under pressure the whole time? Or can they be removed from the prerssure tank and set aside thereby freeing the tank for another batch?
JohnU
Member
I keep them under pressure for the first 18 hours and then let then remove them and let them sit to be less tacky.
jttheclockman
Member
I keep them in tank over night. Then sometime the next day I take out and if I want I can put more in. I do not pay attention to times. I know a whole night which is at least 12 to 14 hours will fine. I do not demold untill I need them. I cast in plastic tubes so there is no sticky stuff to worry about. At times I may stick in toaster oven for a few minutes to make sure they are cured if I am in a hurry to turn. But usually never in a hurry any more these days. Here is what they look like after I take the silicone stopper out and the copper ones were flushed trimmed. Now they all are never perfect. The 2 red copper and black ones, the top one is perfect and the one under it went haywire. Same pot. Same pour, Same everything. Just one of those things. It happens. Hand made stuff. Things happen.
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