NINGBO RUITUO INDUSTRY & TRADE COMPNAY LIMITED.

Casting Process

1. WAX INJECTION: Wax replicas of the desired castings are produced by injecting tooling with wax. These replicas are called wax patterns.

2. ASSEMBLY: The wax patterns are attached to a central wax runner bar, to form an investment tree.

3. SHELL BUILDING: The shell is built by immersing the tree in a liquid ceramic slurry and then coating in a refractory product. Up to 5 layers may be applied in this manner.

4. DE-WAX: Once the ceramic shell is dry, the wax is melted out, using an autoclave creating a negative impression of the assembly within the shell.

5. CASTING OF TREES: The investment trees are fired in an oven and pulled out while hot. The shell is then filled with molten metal by gravity pouring.

6. KNOCKOUT: When the metal has cooled and solidified, the ceramic shell is broken off by using vibration

7. CUT OFF: The parts are then cut away from the central runner bar using a high speed cut-off saw.

8. FINISHED CASTINGS: After minor finishing operations, the metal castings--identical to the original wax patterns--are inspected ready for shipment to the customer.