I find that heating the epoxy before mixing it in the correct ratios will give me a more "liquid-like" epoxy, which makes mixing and pouring a bit simpler. To make the final product stronger and ensure proper curing you should heat the cast for about 2 hours at about 250*F.
JSR do you use medical syringes to mix your epoxy? I bought about 8 of them and I seem to be running out already...
Shear strength of epoxy putty
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jackssmirkingrevenge
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I run the laboratory I work in so I have a practically endless "free" supplytheBOOM wrote:JSR do you use medical syringes to mix your epoxy? I bought about 8 of them and I seem to be running out already...
What I do many times though is take say a 10mL syringe, remove the plunger, plug the nozzle with a screw and use it a small measuring cylinder.
hectmarr wrote:You have to make many weapons, because this field is long and short life
Thanks for all the help.
I suppose I'll heat the epoxy to reduce the viscosity.
My main worry is residual stress from the cooling. As a material cools, it contracts a bit. This will make the epoxy be in a state of tension when the chamber is unpressurized. Devcon was smart enough to provide the coefficient of thermal expansion though, so I should be able to figure out how much stress is created and factor it into my calculations.
I suppose I'll heat the epoxy to reduce the viscosity.
My main worry is residual stress from the cooling. As a material cools, it contracts a bit. This will make the epoxy be in a state of tension when the chamber is unpressurized. Devcon was smart enough to provide the coefficient of thermal expansion though, so I should be able to figure out how much stress is created and factor it into my calculations.
All spud gun related projects are currently on hold.