Investment Casting Process
Design a pattern die, manufactured either from drawings or samples provided by customer.
Once the requirement for the investment casting product has been established the next step is to manufacture precision dies.
Using state-of-the-art wax paste technology, liquid wax is injected into the metal die to produce a high-definition wax pattern of exceptional dimensional accuracy.
Sets of the solidified wax components are removed from the die and assembled in a "tree," which is coated with a number of ceramic layers.
The completed mould is then placed in a pressure vessel where the wax is steamed out to create a hollow ceramic mould ready for firing. Firing the moulds is instrumental in developing its strength and removing the residual wax.
The selected alloy is melted in electric coreless induction furnaces and gravity poured into the investment mould.
Once the cast tree has solidified, the ceramic mould is removed. This is done by using either hydraulic vibration equipment or removed manually; depending on the tree configuration and alloys used.
After the individual castings have been cut from the tree, witness material is removed from castings using abrasive equipment. The castings are heat-treated to enhance their mechanical properties, or to homogenize the casting. All castings are sand or shot blasted to enhance the surface finish.
All castings move through a 100% visual inspection process, after which the relevant branded packaging is used for storage of the completed castings.
Years of experience in the industry ensures that alloys, casting processes as well as the application of the final component leads to ultimate strength, design quality and optimal material usage throughout the investment casting process.