#4 from wax to bronze- Preparing the shell for casting in bronze

24hrs. after the last dip of the shells we cut off the tops of the cups. 

Then we cut slits in the shell to keep them from cracking when the wax heats and expands.  

 Shell 24 hrs. after last dip.  

Shell 24 hrs. after last dip.  

 I used an angle grinder with a masonary  cutting blade to cut off the top.  

I used an angle grinder with a masonary  cutting blade to cut off the top.  

These shells are then put in the kiln cup side down and heated. 

 Heating in the kiln

Heating in the kiln

 Wax melts into bucket

Wax melts into bucket

The wax runs out of the shells into a bucket under the kiln.  This is the lost wax casting method.

 

Once the empty shells have cooled we  patch any cracks and all the cuts used to release the wax except the cup opening and the two main vents that exit at the top of the cup.  

 Shell with cracks and slits patched with sparset

Shell with cracks and slits patched with sparset