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Investment Casting

How the Investment Casting Process Works?

At Invent Cast, investment casting isn’t just a method—it’s a precision-driven journey from wax to metal, crafted with consistency at every stage. We follow a refined, quality-focused process to ensure each component we deliver meets the highest performance standards.

Our Step-by-Step Investment Casting Process

Investment casting involves a series of carefully controlled steps that transform a wax pattern into a durable, high-precision metal component. Here’s how we do it at Invent Cast:

Step 1

Die Development

Accurate Die is made from aluminium block on CNC/VMC machines.
Step 2

Pattern Assembly

Multiple wax patterns are assembled to a wax runner or base, forming a wax tree ready for shelling.
Step 3

Shelling

The wax assembly is repeatedly dipped into ceramic slurry and coated with refractory sand to form a hard outer shell.

Dewaxing
Step 4

Dewaxing

The complete shell is placed in an autoclave or furnace to remove the wax, leaving behind a hollow mold.
Step 5

Shell Pre-heating

The shell is heated at high temperatures to increase its strength and eliminate any residual wax traces.

Step 6

Metal Pouring

Molten metal is poured into the hot ceramic shell, filling the cavity created by the original wax pattern.
Step 7

Heat Treatment

Heat treatment is carried out to achieve the desired micro-structure and mechanical properties.

Step 8

Fettling

Fettling is a post casting process of removing unwanted materials and cleaning the casting to achieve the final desired shape and surface finish.
Step 9

Casting Inspection

Each part undergoes casting inspection and quality checks as per internal or customer control plan.
Step 10

Machining

Secondary processes like drilling, threading, or CNC machining are applied for tight tolerances and specific geometries.
Step 11

Final Inspection

Each component undergoes final quality checks as per control plan and customer requirements.

…and what you get

Advantages of Our Process

We regularly achieve AS Cast tolerances as per ISO 8062-CT8.

AS Cast surface finishes as good as 3.2 Ra – 6.3 Ra, reducing machining time.

Stainless steel, carbon steel, duplex, super duplex and nickel alloys — all cast with optimized parameters and performance reliability.

Our process controls and digital tracking ensure repeatability, especially for high-volume production.

Streamlined process at each stage help us to reduce project timelines significantly.

Invent Cast delivers precision-engineered components through advanced investment casting, forging, and sand casting—serving critical industries with unmatched reliability.

More About Us

Our Capabilities

An Overview of Our Foundry’s Strength, Service, and Success

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