Mechanical Engineering - Workshop Technology - Discussion

Practical Applications of investment casting: Jet propulsion for military and civilian aircrafts gave investment casting the foremost status in the casting industry. From heavy casting of 300Kg to small casting of 30 kg, this casting method is used for as wide for hi-tech industrial applications. This process is more expensive than sand casting in terms of the casting techniques, but the equipment are relatively cheaper. But still, investment casting is largely relied on for complicated designs that cannot be casted using any other method. Investment casting finds widespread application in spacecraft, jet engines, etc. Though this industry is heavily depended on the aircraft industry, it is is find our new field of application to broaden its horizon.

Here not only turbine.

Turbine blades casting by shell moulding.
By book shell moulding used for a small piece and large number.
But only the turbine is by investment casting.

Yes it is investment casting because tolerances obtained in it is about 0.05 mm. So nearly correct dimension is obtained and so does not need any further amendment.

Investment casting is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems.

Investment casting as there is no problem of drafting lines and mostly used for complex sections like turbine blades.

It is an investment. But all the books are given shell moulding. What is the correct answer?
Please tell me.

It is investment moulding. It is also lighter to able to generate much torque for the turbines.

Shell molding is used for cast engine piston and investment casting is for turbine blade.

The most preferred process for casting gas turbine blades is investment casting.

Investment casting is correct answer used jet engine blade or gas turbine blade.