High Pressure Die Casting : Aluminium & Zinc
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High pressure die casting provides the shortest route from molten metal to completed component, by injecting molten metal into a hardened steel mould and allowing it to solidify under pressure before ejection.
Pressure die casting is a repetitive process where identical parts are cast at high production rates by injecting molten metal under pressure into a metal die. Again, this process requires complex machinery.
High pressure die casting is ideally suited to high production rates, and wall thickness’ can be as little as 1-2.5mm. It provides the best surface finish (1.5m), and a very fine grain surface can be obtained. Pressure die castings have high strength in the as cast condition. Castings may be quenched from the die. Machine size will limit casting size. Sound thick sections are difficult to cast, and core configurations must be complex to enable disassembly.
Castings may suffer from porosity, although evacuated chamber and other techniques may reduce this, High startup costs are only reduced by long casting runs, thus enabling low unit cost with a high volume production. Castings cannot be fully heat treated.
This process allows fast, precise, cost effective production of aluminium or zinc die castings, meeting the needs of hi-tech industries where product appearance and dimensional tolerances are critical. MRT have high pressure die casting machines with locking forces of between 220 and 530 tonnes. All feature computerised real-time shot control, automatic ladling, die-spray, automatic casting extraction and cooling.
Small Quantities? - No Problem! Many pressure die casting foundries only offer their services for high volume orders, claiming that lengthy set-ups make the process prohibitive to small quantities of zinc or aluminium die castings. MRT have optimised their tooling preparation and set-up operations to make the process more accessible to customers who require only small quantities of aluminium or zinc castings, but whose applications would benefit from the excellent dimensional and cosmetic properties of pressure die casting. So, MRT can provide the complete service, whether you require a batch of 10 or 10,000.