User manual
Z406 System User Manual Z Corporation
www.zcorp-users.com 63
2. When using wax patterns assembled on wax runners, the tree assembly should go though an
autoclave process for 10 minutes before being put in the firing oven. The autoclave should be
380
o
F (193
o
C) and 130 psi (9 bars). The pattern should then be put in the burnout oven. Note:
this process has been omitted by some users to their satisfaction.
Patterns infiltrated with resin should skip the autoclave process and go directly to the burnout
oven.
3. Z Corp. patterns should be burned out at 1750-1800
o
F (954-982
o
C) in an oxygen rich
environment. Burnout time will depend on the part volume and air circulation. If the part is an
inch thick or less, it should burn out completely in two hours. For larger parts, a longer burnout
time should be expected. The patterns will burn out completely if they are left in the oven for a
sufficient amount of time.
Low-temperature furnaces with air treatment devices using ionized air have also been utilized
successfully to burn out Z Corp. patterns. Refer to the furnace manufacturer for guidelines for
this process.
4. After burn-out, allow the shell to return to room temperature. In some cases, a small amount of
residual ash may remain (less than 1%). This can typically be washed or blown out of the mold.
Wash the shell out with water. Allow the shell to dry and thoroughly pre-heat shell before pouring
metal to entirely eliminate any water vapor that may remain.
Results
• 2% shrinkage should be expected when going from the Z Corp. pattern to a cast part. The
surface finish will depend on the surface of the original pattern, but can be expected to be around
3-5 mils.