The Linear Extending Actuator is an extending actuator designed by XYZAidan and adopted by the Soft Robotics Toolkit.
The fabrication process is described in detail on the Soft Robotics Toolkit page.
The molds are also available for download on the Soft Robotics Toolkit.
The mold comes with a prebuilt inlet sleeve.
From the guide:
Insert a short length of ⅛” tubing into the sleeve of the actuator. Tighten a zip-tie around the tubing and sleeve to prevent leaks. Check with your pressure source to make sure there are no leaks before trimming the excess zip-tie.
Unfortunately we've encountered difficulties in separating the actuator from the mold, and weren't able to test this actuator. Application of Vasaline may have helped with this issue, still we suspect that this mold cannot be used more than once and will break after one attempt.