High Pressure Die Casting (HPDC) technology

So, casting means forcing molten metal under high pressure into reusable metal dies. It is often described as the quickest route between raw materials and finished product. The completed product also called “die casting” is an accurately dimensioned, sharply defined, smooth or textured-surface metal part.

The process has a number of phases:

the production of a steel mould able to produce tens of thousands of castings in just a few seconds, which is divided into not less than two sections to allow the removal of the castings.

Mounting of the 2 sections onto a selected machine where one will be stationary (fixed die half) while the other is moveable (injector die half). They’re then clamped tightly together.

Injection of molten aluminium into the die cavity where it quickly solidifies.

The 2 sections are drawn apart and the casting is ejected.

After all, relying on the complicatedity of the final part, die casting dies can have moveable slides, cores, or other sections. The whole process is the fastest presently known able to produce precise non-ferrous parts.

Let’s focus now on the die castings die composition. They are made of alloy instrument steels they usually have at the least two sections:

The fixed die half, which is mounted on the side toward the molten metal injection system. It’s specifically designed to include the sprue gap by which molten aluminium enters.

The ejector die half, which is mounted on the moveable platen of the machine. It adheres to the other part and it is removed when the die is opened. Usually, it contains the runners (passage ways) and gates (inlets) which route molten metal to the die cavity (or cavities). It is also linked to an ejector box, which holds the mechanism to eject the casting from the die.

How ejection works?

The opening stroke of the machine entails the pins which are related to the ejector plate moving forward thus they force the casting from the cavity. They should be carefully arranged so that any force placed upon the casting throughout ejection will not cause deformation.

Then, when the die closes, return pins hooked up to the ejector plate return it to its casting position.

The die casting might be adjusted dependent on requirements. If the side of a die casting design requires a depression, one or more slides can be utilized to acquire the desired result without affecting the ejection of the casting.

Indeed, if the slides and cores aren’t caretotally fitted and securely locked into position throughout the process, molten metal may very well be forced into their slideways inflicting a disruption of operations.

Fixed and moveable cores are sometimes utilized in dies. If fixed, the core axis must be parallel to the direction of the die opening. If moveable, they must be attached to core slides.

In conclusion, though slides and cores enhance the complicatedity and the cost of die development, they permit adaptation of die castings to a wide variety of configurations, normally more economically than another metalworking process.

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