ZAMA as synonymous with versatility

It is generally thought that the die casting process is an exclusive of big and great series. It is necessary to forget this preconception, indeed feasibility is related to the complexity of the piece and to the less expensive production techniques. Hence, what will mainly increase the final price of the piece will be part of the cost of the equipment. For this, it is not uncommon to find series of 500 pieces per year made in die casting. However typical series are over 5.000 pieces per year in one or more lots.
 

The specific heat values and the latent heat of fusion contained, the short solidification interval, combined with the use of technologically advanced machines, allow to achieve high production rates even with multiple cavities within the same mold. Therefore, it is not difficult to achieve productions of thousands of pieces per day.

A limit of zinc alloys may sometimes be the high density of about 6.92 Kg/dm³, little more than twice as a standard light alloy. But in comparison with the latter, the zinc alloy has a much lower melting point and a better flowability. Therefore it adapts to the most complex shapes with extraordinary capabilities, allowing to obtain a close tolerance range and even five-times thinner thickness as regards to the ones obtained in aluminum or magnesium. Finally, it is possible to have high relief die-castings at very reduced prices.

 

 



Another peculiarity of the zama is the long life of the molds. Thanks to a long restrained melting temperature, the molds allow a four-time longer life in comparison with corresponding ones which are needed to melt aluminum (1 million cycles against 250,000).

Thanks to the excellent superficial finish, already obtainable during the melting phase, it is rarely necessary to carry out expensive secondary operations like trimming, straightening, etc.
Die-cast castings, if necessary, are undergoing to precision machining, as well as superficial finishes of various kinds on customer request, always meeting high quality standards.

Countless superficial treatments can be carried out:
- Galvanic (phosphating, chromium plating, nickel plating, zinc-coating)
- Painting (liquids, Cataphorese powders)


Zinc alloys / Alluminum alloys:
  • Single breaking load: 250-330 N/mm2  / 300-550 N/mm2
  • Mold cost: 1 / 1+25%
  • Mold life (molded pieces): 1.000.000 / 200.000
  • Melting point: 410°c / 680°c    
  • Raw material cost: 1 /1+40%  

Typical reference values