Topic Tag: silicone

I want to make a mold with silicone because it's much cheaper than metal, but I'm worried about the compression. I talked with a silicone expert, and he has a silicone which can withstand high temperatures. I tested it by extruding plastic onto a piece, and it held up. This guy says he can make a mold of the object I want to create which is a roughly 12 cm diameter ball. He can make the mold for about 50 USD. Has anyone tried using silicone molds? If so, how did you ensure a proper seal and connection to the injection nozzle, and how did you reinforce the silicone so it wouldn't warp or move when pressure was applied from the plastic filling the mold? Any ideas are welcome, thanks