1.In this process, we will use two cylinders for the molding process.

2.The chemical reagents for the unmolding process will be used for the inner and outer cylinder.

3.The outer cylinder will be assembled with the inner cylinder, followed by pouring the silicone rubber for the molding.

1. In this process, we will use the two-part molds for the molding process.

2. At first, unmolding chemical reagents will be sprayed onto the printed molds.

3. Then, after the even mixing of silicone rubber, the mixed silicone rubber prepolymer will be degassed using a vacuum pump.

4. At last, the degassed silicone rubber prepolymer was poured into the molds. After curing for 6 h, the two parts can be removed and set aside for assembly.

In this process, the two parts will be glued together using silicone glue. After 30 min curing, the silicone bladder was obtained.

Valves were manufactured using a cricut CNC razor cutter, which sliced the valve pattern out of inexpensive flexible section dividers as you might find in a binder. 

The nose cone, intake clamps, and outlet clamp assemblies (see design page to learn more about these parts) were 3D printed using PLA.

Full assembly was completed by using silicone glue to fuse the intake and outlet clamp assemblies to the silicone body. If we were to make recommendations for future cephalobot enthusiasts, we would suggest redesigning the intake and outlet assemblies such that a collar is glued to the silicone body and then the intake and outlet assemblies could be screwed into the collar. This would make maintenance easier and permit swapping in different bladder styles.

The rear outlet clamp should be taped to the body to make sure it stays tightly in place.

A 2" long 1/4" OD vinyl tube should be affixed with silicone glue into the end of the bladder, this can later be connected using a sharkbite connector to your preferred airline. We recommend using 3/8" OD latex tubing which is flexible and does not tend to push the robot around. Both the vinyl and latex tubing should be readily available at your local Lowes.