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Investment Casting

Investment Casting
Investment casting, also known as precision casting or lost-wax casting, gives a wider freedom of design than most other metal forming techniques.
The precision casting can make any kind of complicated shapes, be combined in one body. It will save a lot of machining process and reduce the costs.

Advantage
►Small-volume
►A wide range of different items

Product Application
►Food processing Machinery
►Automotive Parts, Diesel Engine
►Pumps & Motors
► Ornamental Castings
► Flanges,Valves,Fittings
► Pipes,Compressor
► Hand Tools & Machine Tool Parts
►Hardware,Metal component, etc......

Investment Casting Process

As above figure, investment casting process can be summarized into the 12 steps.

01 Creation of the Mold

The initial step in the investment casting process is creating an aluminum mold from customer-provided 2D drawing and specification.
The mold is a negative relief of the components to be cast.

02 Wax Injection

Wax, in semi-liquid state, is injected into the mold to form the wax pattern.

03 Wax Pattern Assembly

The wax patterns are assembled onto runner.
The sprue, runner, and wax patterns are referred to as a tree.

04 Shell Coating

Successive ceramic layers are coated in the wax pattern to form a hard exterior shell around the pattern.

05 De-Waxing

Put the assembly into the funeral to heat to 1800℃ to make the wax melt.
Place the ceramic shell in an autoclave or even to remove the interior wax of the ceramic shell.
It is the part of the process that gives lost wax casting the name “lost wax”.

06 Sintering

A shell mold is then pre-heated in preparation for metal pouring.
Preheating allows the metal to stay in the molten state longer so that it can better fill all mould details and increase dimensional accuracy.

07 Casting

Molten metal up to 3000℃ is poured into the hollow of ceramic mold.
And then make it cool.

08 Shell Removing

The ceramic shell is broken off, and the individual castings are cut away.
After the metal has solidified, the ceramic material that forms the mold has to be removed.

09 Cutting

The finished component has to be separated from the gates and runners once the ceramic mold has been removed.
This is normally performed with grinder and the waste material is collected for reuse.

10 Heat Treatment & Machining

11 Inspection

The casting parts undergo through inspection to make sure that they meet dimension tolerances and specifications.

12 Package & Delivery

Every components are packed carefully and delivery to the customer.

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Investment Casting