- The use of citric acid cleaning wax tree oil and release agent for about 30 seconds. To ensure the wax tree is clean before dipping.
Clean wax tree.
Dipping and Fluid Sand
- The use of binder and refractoriness to make slurry liquid and mix with zircon sand and mulgrain sand are sequentially attached to a wax tree after repeating many times. It isn’t allowed any residual air bubbles until a predetermined thickness. The number of times r and thickness of the ceramic shell are determined by casting weight.
When small fonts and generally easy to ignore the gap on the casting, it can use vacuum dipping machine to solve the bubble problem.
Vacuum Dipping Machine.
- Each layer requires some time to make dry in order to reach the strength. The drying room needs to maintain a stable temperature and humidity.
- Put assembly wax tree into the high pressure container and locking through the steam-heated to make rapidly melt of wax outflow. The operation needs to be fast in order to prevent break and deformation.
The shell mold after de-waxing.