What epoxy for silicone mold?

[Fordiesel69]

Looking to glue this back together and put into a silicone mold. Once I get the mold what is the best plastic like epoxy I can make this part from?

Would prefer something easy to obtain and cheap. This is a plastic bump stop for a pneumatic valve. It let's the plunger bump into this to limit its travel so the metal plunger stays inside the magnetic field coil for precise switching. Without this bumper the valve still works but it over / under shoots.

 

[Kira]

What is it made of? Do you have all the pieces?
Is this an industrial application?

 

[JohnnyG]

Epoxy might be too hard/brittle and not take repeated strikes. However, if you think it will work, they make a black "plastic epoxy" which is available at the hardware store.
That part doesn't look that complicated to make out of hard rubber sheet stock. Punch the hole out with a small hollow punch, and work the rest from there.
McMaster Carr will sell any sheet rubber you might need.

 

[Vercingetorix]

Something like this?
https://shop.sculpt.com/products/cl...6r6hEAyQJUblir1f8zdBPPTCn0w2IbLSh_GkWxtDp7zYQ

 

[TnT_M]

try plastic welding it. I have had good luck with my cheaper HF unit.

 

[Fordiesel69]

Would be better to have this part drawn in a CAD program and 3D printed instead?

My buddy has a nice printer and nice resin strings to make it durable we just dont know how to make the part in the software to input it into the printer.

 

[TnT_M]

Would be better to have this part drawn in a CAD program and 3D printed instead?

My buddy has a nice printer and nice resin strings to make it durable we just dont know how to make the part in the software to input it into the printer.

that will certainly work. You will need someone to draw the part in Solid Works or Creo etc... Then create the necessary file for his printer, likley an .STL

 

[ctechbob]

That looks to be a fairly simple part. If it needs a bit of spring it can be printed out of TPU. Should hold up pretty well.