I needed a custom sized bellows to seal a radio box so I designed this mold to suite my purpose. Simply print all three parts, sand them smooth a bit as needed and ensure the mold halves meet as flush as possible to minimize flashing.
The through hole is 9mm on the wide end and 4.25mm on the small end, with the base diameter being made for the radio box hole of about 13.5-14mm.
After inserting the core and clamping the halves (mold release is recommended) I ran a piece of masking tape along the edge to ensure it doesn't leak. I used 30A silicone and a 6ml syringe to inject it slowly into the bottom and letting the air work its way through the channels and up out the top vent hole, this bellows used about 4-5ml of silicone.
Once cured, pull the mold halves apart and carefully peel the bellows off of the core like a sock starting from the wide end and once removed simply re-invert it. Clean off any flashing and it's ready to use.
| Radio_Box_Waterproof_Seals_Mold_1.stl | 193.1KB | |
| Radio_Box_Waterproof_Seals_Mold_2.stl | 251.7KB | |
| Radio_Box_Waterproof_Seal_Mold_Core.stl | 180.0KB |
