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Precision Investment Castings–Ferrous/Non-Ferrous
Precision Investment Castings–Ferrous/Non-Ferrous
Advik Hi-Tech Industries is engaged in the business of Precision Investment Castings. The company, a recognised leader in both high-volume and short-run production of the finest quality castings in ferrous and non-ferrous metals, has established a new foundry. Castings in ferrous and non ferrous metals are manufactured as per Indian and overseas standards. Replicas of the desired investment casting are produced by injection moulding. These replicas are referred to as patterns. Patterns are then attached to a central wax stick, called a sprue, to form a casting. This is called a wax tree. The shell is built by immersing the wax tree assembly in liquid ceramic slurry and then into a bed of fluidised fine sands. Up to eight layers may be applied in this manner depending on the shape and weight of the part. Once the ceramic is dry; the wax is then melted out, creating a negative impression of the assembly within the ceramic and sand shell. This process uses autoclaves to maintain shell integrity. In the conventional lost wax casting process, the preheated shell is filled with molten metal by gravity pouring the metal into the ceramic shell. As the metal cools, the parts, gates, sprue and pouring cup bed one solid casting. Shell temperature and melt temperature will vary depending on the alloy. Once the metal is cooled and solid, the ceramic shell is broken off by vibration. The parts are then cut away from the central sprue using a high speed saw. After minor finishing operations, the metal investment castings identical to the original wax patterns-are ready for dispatch to the customer.