Table of Contents
Advertisement
Cut away excess plastic around the socket.
Remove the socket from the plaster cast. When the cast and electrode
dummies are removed, the nail holes will leave two dimples in the electrode
pocket. These dimples will not interfere with the seating of the electrode. Use
one dimple as a guide for a wire exit hole - use a 7/32" or 5.6mm drill bit to
create a hole for the electrode cable.
Smooth and/or bevel the hole to prevent cable damage.
Electrode Pocket
Dimple
SOCKET CROSS-SECTION VIEW
We highly recommend 5mm (minimum)- 8mm soft plastics such as:
Silicone ProFlex
•
Northvane
•
OP-TEK Flex
•
If you plan to use a thicker plastic, we recommend applying heat around the
dummy after setting the plastic to ensure the plastic molds tightly around
the dummy.
Important: Do not heat material for too long or at too high of a temperature.
The material will become thin during vacuum forming and will need to be
redone.
Hole
Electrode
20
Inner Socket Fabrication - Silicone
While building up the silicone over the cast, apply a higher durometer around
the electrode dummies, making sure to press the material fully underneath
the extended edges of the dummy. We recommend between 50 and 80
Shore A durometer around the electrodes.
If you are creating a suction socket, ensure there is a silicone layer about
2mm thick over the entire back of the electrode dummy. Taper the material
on all sides of the dummy down to the cast.
Finish the socket by blending the rest of the material around the edges of the
harder material and allow it to cure normally.
When the material is fully cured, remove the cast. There will be two dimples
left from the nail holes. Either of these can be used to align the holes for the
cable exit, as the electrode is symmetrical. Use a 7/32" (5.6mm) punch or drill
bit to make the hole for the cable exit or cut a slit into the back of the pocket
at the location of one of the nail hole dimples.
Installing the Electrode Into the Inner Socket
Insert the cable into the hole in the inner socket and pull fully through. Align
the electrode with the pocket and push on the contact surface to snap it in.
21
Advertisement
Table of Contents
