Zinc die cast
When zinc die casting , the liquid will melt a zinc - alloy ( zamak ) under high pressure and high speed in a die-casting mold ( mold pressing). This process takes place within approx. 10 to 20 milliseconds, depending on the required surface quality and wall thickness. Castings of high precision, hardness and strength are produced. Zinc is processed on hot chamber die casting machines.
Due to the relatively low melting point (approx. 390 ° C; manufacturing temperature: approx. 430 ° C) and a particularly narrow solidification interval of the zinc alloys, particularly tight tolerances and demanding surfaces can be produced with zinc die casting. In this way, it is possible to manufacture large quantities from one mold. The number of pieces can be between 1000 pieces / h for small parts and 90 pieces / h for large parts. The dimensional stability is between 500,000 and 5 million cast parts.
Zinc die-casting is suitable for the smallest parts (e.g. zipper claws) up to medium-sized parts with a complicated shape (e.g. housings for electrical devices). Many handles and locks on doors, windows and gates are made of die-cast zinc, as are model trains and model cars .
With zinc die-cast products, so-called zinc plague , an intergranular corrosion phenomenon, can occur under certain conditions .
See also: Zinc casting , die casting , zinc pest , zamak , Silicon Tombac , die-cast aluminum , magnesium die casting , tooling , mold making , casting container