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Concept for Investment Casting

 


   
Relative Evaluation for Different Production Types

 

Investment Casting

Machining

Powder Metallurgy

Sand Casting

Hot Forging

Cold Forging

Freedom of Material

1

4

3

2

6

5

Complication of Design

1

4

3

2

5

6

Production Cost

5

6

1

2

4

3

Mechanical Strength

4

2

6

5

1

3

Dimensional Accuracy

2

1

3

6

5

4

Surface Texture

2

1

3

6

5

4

Cost of Mold

3

1

4

2

5

6

Productivity

5

6

1

4

3

2

 

 

 

 

 

 

* Smaller number is better.

 

   
Comparison for Various Manufacturing Types

 


Type

Feature

Dimensional Accuracy

Unit Weight

Quantity of Production

Deform of Parts

Cost

Investment Casting
*
Sophisticated construction parts.
*
Suitable for difficult machining or forging parts
*
Applicable for special alloy, such as Ti, Al.

±1%
(also ±0.5%)

Free
(Normally≦30Kg)

≧500

◎

○

Machining
*
High precision parts.
*
Flexible production quantity, especially low quantity.

±0.01

Free

≧1

X

X

Metal Injection Mold
*
Tiny, light & sophisticated parts.
*
Suitable for difficult machining parts.
*
Suitable for mass production parts below 20g.

±0.1

Light
(Normally≦20Kg)

≧1,000

○

△

Sand Casting
*
High flexible production.
*
Quick production run.
*
Applicable for low quantity, high variety or mass production.
*
Surface roughness is not strictly required.

±2

200Kg

≧1

○

○

Hot Forging
*
Increasing strength ＆ toughness of parts.
*
High & reliable production.
*
Suitable for various metal material.
*
Weight of parts depend on equipment.

±0.3

Depends on forging equipment

≧25,000

△

◎

Cold Forging
*
Suitable for small parts with mass production.
*
Low material lost, high efficiency productivity.
*
Applicable for simple shape & precision parts.

±0.05

Light
(Normally≦10Kg)

≧50,000

△

◎

 

 
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