Apr 23, 2014

Hot chamber die casting

Plunger Is 
Back Up And New Casting Cycle Is Ready To Begin

Hot chamber die casting is one of the two basic types die casting in which molten metal is directly poured into the mold cavity from the molten metal chamber usually called hot chamber and that why this process is called hot chamber die casting

Parts of hot chamber die casting

  • Hot chamber
  • Intake port
  • Shot cylinder
  • Connecting rod
  • Plunger
  • Goose neck passage
  • Casting cavity
  • Mold

Steps involves in hot chamber die casting

Step 1

Mold having the casting cavity is prepared and attached to the hot chamber containing the molten metal

Step 2

Initial position of the plunger is at the top of the chamber and intake port is open due to which molten metal is filled into the hot chamber.

Hot Die Casting 
Operation Is Ready

Step 3

When hot chamber is filled with the molten metal. Shot cylinder force the plunger to move down and after some distance it closes the intake passage and stops the further filling of the hot chamber.

Plunger Has 
Cut Off Intake Port Supplying Molten Metal To The Hot Chamber

Step 4

Now further down ward motion of the plunger will create pressure on molten metal and force it move into the mold cavity. The plunger will remain in this position until the molten metal is solidify. After that it will move back and then the whole process and be start again

Bottom Of 
The Injection Stroke In A Hot Die Casting Process

Advantages of hot chamber die casting

  • High production rate
  • Less danger to labor

Disadvantages of hot chamber die casting

  • Only low melting materials and alloys can be cast
  • Plunger is always dipped into the molten metal due to which its life less


  1. difference between hot and cold chamber die casting is that how molten metal is injected into cavity