#  Step 2: Assemble Mold 

 



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#### Assemble Top Mold

Sort   ![glued_block.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/glued_block.png?itok=snuMf6F-) 

 



Glue the central block to a sheet of cardboard and trace the bottom with hot glue to prevent rubber from flowing underneath.

   ![top_mold.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/top_mold.png?itok=CseIx6yJ) 

 



Build the surrounding wall around the central block, with a 0.25” gap between the block and the corresponding side walls and a 0.5” gap between the short sides of the block and the end walls.

   ![sealed_mold.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/sealed_mold.png?itok=9LPhB7n8) 

 



To prevent the mold from leaking, seal all joints with hot glue. This should be done at least twice to ensure there are no leaks.









#### Assemble Bottom Mold

Sort   ![bottom_mold.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/bottom_mold.png?itok=vRvyNSId) 

 



Make the bottom mold by tracing a 7” by 1.5” block with hot glue. After the glue cools trace the box again to add a second layer of hot glue. Repeat until the hot glue is stacked about a 0.25” high.

   ![Complete Mold](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/compleate_mold.png?itok=JZ_tz3_c) 

 



  
This is what the mold looks like when completed. (The paper is used in the fabrication of the actuator.)