die casting n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
DIE CASTING PowerPoint Presentation
Download Presentation
DIE CASTING

Loading in 2 Seconds...

play fullscreen
1 / 14

DIE CASTING - PowerPoint PPT Presentation


  • 577 Views
  • Uploaded on

DIE CASTING. Presented by: Chandra bhan prajapati 2008AMD2934. The casting process is subdivided into two distinct subgroups:. 1 - Expendable mold casting (sand, plastic, shell, and investment (lost-wax technique) mouldings.) . 2 - Nonexpendable mold casting

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'DIE CASTING' - asha


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
die casting

DIE CASTING

Presented by:

Chandra bhan prajapati

2008AMD2934

slide2

The casting process is subdivided into two distinct subgroups:

1 - Expendable mold casting

(sand, plastic, shell, and investment (lost-wax technique) mouldings.)

2 - Nonexpendable mold casting

(permanent, die, centrifugal, and continuous casting).

Classification of die casting:

(a)Gravity Die Casting (also called permanent mould process)

(b)Pressure Die Casting

slide3

Die Casting Process Flow

(Image courtesy: wiki)

slide4

[ pressure die Casting Techniques]

[Pressure-die casting]

[Die casting Fence fittings]

[Die cast Part of automobile]

(Image courtesy: wiki)

slide5

There are two basic types of die casting machines:

(1)hot-chamber machines

(2) cold-chamber machines

(Hot Die Casting machine)

(Image courtesy: wiki)

slide6

cold-die-casting machine

(Image courtesy: wiki)

slide8

( Cooling Curve for casting)

(Image courtesy: wiki)

Chvorinov's rule:

The local solidification time can be calculated using Chvorinov's rule, which is:

slide9

Structure:

(Intermediate cooling rates from melt result in a dendritic microstructure.

(Image courtesy: wiki)

slide11

Die casting materials:

  • Zinc: the easiest alloy to cast; high ductility; high impact strength; easily plated; economical for small parts; promotes long die life.
  • Aluminum: lightweight; high dimensional stability for complex shapes and thin walls;.
  • Magnesium: the easiest alloy to machine; excellent strength-to-weight ratio; lightest alloy commonly die cast.
  • Copper: high hardness; high corrosion resistance; highest mechanical properties of alloys die cast; excellent wear resistance.
slide13

Advantages:

  • Excellent dimensional accuracy
  • Smooth cast surfaces (1—2.5 μm rms).
  • Thinner walls can be cast
  • Inserts can be cast-in (such as threaded inserts, heating elements )
  • Reduces or eliminates secondary machining operations.
  • Rapid production rates.
  • tensile strength as high as 415 MPa .
  • Disadvantages:
  • Casting weight must be between 30 grams and 10 kg
  • Casting must be smaller than 600 mm
  • High initial cost.
  • Limited to high-fluidity metals.
  • A certain amount of porosity is common.
  • Thickest section should be less than 13 mm
  • A large production volume is needed to make this an economical .