Aluminium die casting

 Die Casting Manufacturer and High pressure Die Casting Process


The traditional pressure die casting process may be described as the injection under high pressure into a steel mould (we called high pressure die casting ) of a molten metal alloy. This solidifies rapidly (in a few seconds) to form a net-shaped component, which is then automatically extracted.

The majority of zinc components, and non-ferrous components in general, are produced by the high-pressure diecasting process. Other casting processes include gravity casting and investment casting, suitable for low volumes or materials with very high melting points.

There are two basic presure diecasting processes, differentiated only by their methods of metal injection: hot-chamber and cold-chamber. In addition, there are two types of hot-chamber diecasting processes: conventional and multi-slide. All of these diecasting processes are described in greater detail in the relevant sub-sections.


Other type of casting process difference to aluminium die casting


Many of the Benefits and Myths of diecasting are clarified and common terms are explained.


Today with the help of the modern technology "Lost Wax Casting" Process is being used to produce casting for almost all engineering fields especially for critical and complex items like aerospace components, valves for gas and oil etc. The modern lost wax process at CNM Involves the following steps


We prepare our product drawing with the help of CAD or manually and based on the drawing, the dies are developed from mild steel or Aluminum material 

Molten wax is injected into the die casting mold under pressure using wax injection presses and after specified time the casting mold opened to reveal a perfect copy of the original. Multiple wax patterns are then mounted around a stem of wax to create a "tree"

Plaster type slurry is repetitively (the coating parameters varies based on the type of the component ) coated on these "trees", which sets solid on the wax patterns. Then these trees are heated to melt out the wax inside the cavities. After proper dewaxing and cooling process the shells are ready to receive molten metal to formulate the original casting parts.


The required material is melted in induction furnace as per the relevant standards then the molten material poured in to the pre-heated shells.  Online chemical analysis with Spectrometer is being carried out for each and every batch of molten metal.

After proper cooling, the shell is removed and castings are cut out from the trees then they pass through fettling, Heat Treatment, Blasting, Inspection, Packing and Dispatch.


During all the above stages each wax pattern and shell are continuously monitored to ensure dimensional accuracy, finishing, similarity etc