The alloy of Zamak was created by New Jersey Zinc Company in the decade of 1920, its name is a German acronym of the materials that make up the alloy: Zink(Zinc), Aluminium (Aluminio), Magnesium (Magnesio) y Kupfer (Cobre).
Zamak is an alloy of the above materials.It is a non-ferrous and versatile material. Its composition gives it excellent properties for the manufacture of mold injection parts in large quantities, with high precision and reproducibility of details, Regardless of the machining process and reducing costs.
The manufacture of parts by foundry Zamak have a number of advantages compared to the manufacture of aluminum injection pieces. These advantages are mainly translated into time savings, Costs and better finishes of the pieces:
– The Zamak requires less energy consumption for its transformation, as it melts at 380-385 º C. – The injection of Zamak under pressure allows to manufacture parts in large volumes with a high precision. – Faster injection cycles. – Savings of machining. – The pieces made with Zamak allow better finishes and superficial treatments (paintings, chromos, gold, matt aluminum, zinc, etc.). – High strength and hardness. – Excellent electrical conductivity. – High thermal conductivity. – Low cost of the raw material. – High dimensional precision and stability. – Excellent ability for thin walls. – Possibility of deformation in cold, facilitating the joints. – High quality finishing features. – Extraordinary resistance to corrosion. – Fully recyclable.
The most widely used alloy in Europe is Zamak 5. Its copper content gives it greater strength and hardness at the expense of a certain loss of ductility (greater elongation). Like when a certain value of the tensile strength is needed, Zamak 5 is the recommended material.
According to the standard: UNE-EN 1774 Designation: ZnAl4Cu1 – ZL5