Welcom to Qingdao Donrex Co., Ltd. Offical Website!


Qingdao Donrex Co., Ltd.

Contact Us

Add: 1408, building2, Noble plaza, No.328, Dunhua Road, Qingdao, China

Tel: 86 532 85800130

Fax: 86 532 85699926

Email: [email protected]

Die casting

Die casting

Die casting is the process where molten metal is injected into a mold under high pressure in the range of 10 to 210 Mpa. This will result in a highly uniform casting with very good surface finish and exceptional dimensional accuracy. Usually this can either eliminate or greatly reduce the machining required to finish the part. We could offer both the cold chamber process and the hot chamber process. In the cold chamber process the metal is ladled into the injection chamber for each shot. This is less exposure of the molten metal to the chamber walls and plunger. This is very useful for aluminum and cooper alloys that would easily alloy with iron at elevated temperatures. The hot chamber process has the injection chamber which is connected to the die cavity permanently immersed in the molten metal. The hot chamber process is used for metals of low melting point and high fluidity such as tin and zinc. Minimum wall thickness and draft angles for the die castings are as follows: 

The material that Donrex offers are alloys of aluminum, copper, zinc and magnesium. Zinc castings can be made with thinner wall thickness than aluminum due to high melt fluidity. Donrex could produce parts from very samll to about 30Kg for aluminum, 10Kg for magnesium, 50Kg for zinc and 5Kg for copper.

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