High Pressure Die Casting (HPDC) technology

So, casting means forcing molten metal under high pressure into reusable metal dies. It’s usually described because the quickest route between raw materials and completed product. The completed product additionally 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 a number of seconds, which is split into at the least sections to allow the removal of the castings.

Mounting of the two sections onto a particular 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.

Of course, depending on the advancedity of the final part, die casting dies can have moveable slides, cores, or other sections. The complete process is the fastest at the moment known able to produce precise non-ferrous parts.

Let’s focus now on the die castings die composition. They are made of alloy software steels and they have no less than two sections:

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

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

How ejection works?

The opening stroke of the machine involves the pins which are connected to the ejector plate moving forward thus they force the casting from the cavity. They have to be careabsolutely arranged in order that any force positioned upon the casting during ejection will not cause deformation.

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

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

Certainly, if the slides and cores aren’t carefully fitted and securely locked into position during the process, molten metal could possibly be forced into their slideways inflicting a disruption of operations.

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

In conclusion, though slides and cores improve the advancedity and the price of die construction, they permit adaptation of die castings to a wide variety of configurations, normally more economically than any other metalworking process.

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