China Investment Casting , China Lost Wax Casting ,Carbon Steel Investment Casting,Stainless Steel Investment Casting,Alloy Steel Casting

Investment Casting
The Investment casting is known as the "lost wax casting process" and as "precision castings (silica sol precision casting process)".

investment casting product is applied in automobile,construction,railway,ship,mining,engineer machinery,oil and hardware etc

Investment Casting is commonly referred to as the “lost wax casting process”. Here's how the process works. First, high temperature wax is injected into a ceramic shell mold to form a pattern. The wax is then removed from the mold after it has cooled. The pattern created by the removed wax form now resembles the component. This mold is then heated in a fire oven, and molten metal is poured into the mold. After the metal has cooled and set, the precision castings are cleaned and subjected to further heat treatments. Depending on the specific design requirements, some machining may be performed to bring the castings to their precise final form.

Investment casting is an extremely cost effective and highly accurate process. Also, many high strength and corrosion resistant materials can be used in investment casting, including:
• Low alloy steel
• Highly alloy steel
• Manganese steel
• Stainless steel
• Low to high carbon steel

WAX INJECTION

Replicas of the desired investment casting are produced by injection molding.These replicas are referred to as patterns.

ASSEMBLY OF WAX TREE

Wax Trees

Patterns are then attached to a central wax stick, called a sprue, to form a casting. This is called a wax tree.

CERAMIC SHELL BUILDING

The shell is built by immersing the wax tree assembly in liquid ceramic slurry and then into a bed of fluidized fine sands. Up to eight layers may be applied in this manner depending on the shape and weight of the part.

DEWAX

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.

CONVENTIONAL CASTING

Transfer Ladel

In the conventional lost wax casting process, the preheated shell (up to 1800 deg F) 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 become one solid casting. Shell temperature and melt temperature will vary depending on the alloy.

KNOCKOUT

Once the metal is cooled and solid, the ceramic shell is broken off by vibration or water blasting.

CUT OFF OF PARTS

The parts are then cut away from the central sprue using a high speed saw.

FINISHED METAL INVESTMENT CASTINGS

After minor finishing operations, or possible required machining operations, the metal investment castings--identical to the original wax patterns--are ready for shipment to the customer from our metal investment casting China foundry. We are able to provide finished stainless steel investment casting, steel investment casting, aluminum investment casting, cobalt alloy investment casting, nickel alloy investment casting and precision investment castings.

WALL THICKNESS

Please call for tolerance specifications for wall thickness or any tolerances in general. Depending on the metal or alloy, minimum wall thickness can range from 0.04 inches to 0.08 inches.

Wax Mold Steel Pouring Wax Mold Stock Six units of Electric Furnace

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