Aluminium and Zamak Injection Die Casting. Industrias DOJE S.L.

Zinc alloys foundry under pressure are the most common zamak zamak 3 and 5. They are transformed into hot chamber die casting. Other alloys with higher aluminum content (ZA8, ZA12, ZA27, ...) are much less used.

Composition

Former name:

The former name was zinc alloys:

Terms zamak 3, Zamak 5 ZA8, ZA12 and ZA27 are very commonly used worldwide in both Europe and the US. The name zinc alloys (foundry under pressure) is more "standardized" global than that of aluminum alloys (Al Si9Cu3 A380 in Europe and the USA). Probably due to a greater historical age of the industrial use of zinc alloys.

Functional properties

(*) Coefficient of thermal expansion (.mu.m / mK)
CThermal conductivity (W / mK)
Rm - Tensile strength (MPa)
Rp0.2 - Yield strength (MPa)
Fatigue Fatigue resistance (10 cycles E8 MPa)

Fuente: My little blog fonderie

As you know there are many types of materials for jewelry pieces . But today we pay attention to one in particular that has shown great results , come and compact shape , so that we can acquire and simply add it to our room. We speak of Zamak .

And what is the zamak ? You see, it is a material made from zinc alloy , aluminum, magnesium and copper. It is hard and tough, and can be found in lots of ways for your beads.

Ideal for jewelry because with the passage of time is not damaged, you may lose some luster but does not deteriorate or is aged with use unlike other materials. Compared to silver, Zamak besides being cheaper is not dirty with use. And compared to metal, Zamak no breaks or gets ugly with the passage of time, is lighter than steel and almost has the same resistance. This does not mean that there do not care for it, but it is more durable and attractive than other materials.

Source : abedulart

A variety of high quality surface finishes is another major advantage

Electro-Plating

Zinc die castings offer excellent plating characteristics. Electro-plating is generally a multi-layered coating consisting of one or two copper layers, one or two layers of nickel, and a final layer of chromium, brass, gold, or any other platable metal. Chromium plating is the most popular decorative finish when corrosion and high abrasion resistance are required.

Chrome plating adheres best to the ZAMAK alloys and ZA-8 followed by ZA-12. Chrome plating of ZA-27 is possible but more difficul due to the need to treat ZA-27 like an aluminum casting. Processes which provide a smooth, dense outer skin such as pressure die casting and permanent mold casting are preferred when plating is being considered.

Chromates

Chomating is a low-cost chemical treatment that provides additional corrosion protection against « withe rust ». This form of zinc corrosion is caused by prolonged exposure to damp conditions. Chromate finishes are produced by simple dip methods which deposit a thin chromate coating. Chromate coatings are often applied to instrument, military and automotive components where low cost resistance to moisture is required. These coatings normally have a bronze tone or metallic lustre depending on the process used.

Phosphates

Phosphate coatings are primarily used to provide a good base for painting or powder coating.

Anodizing

A special zinc anodizing treatment is avaliable for zinc castings. This coating is completely different than that for aluminum alloys. Zinc anodizing is a functional coating providing maximum corrosion resistance in atmospheric and marine environments.

Since the process uniformly coats deep recesses and threaded areas, anodized zinc alloy casting can serve as an economical alternative when replacing traditional brass, bonze and stainless steel components.

Polishing and Brushing

Conventional high lustre polishing or brush finishing techniques can produce appearances similar to chrome plating or stainless steel. When lacquered, these finishes are suitable for decorative, interior applications.

Painting

All zinc alloys form an excellent base for paints. To aid paint adhesion, phosphate or chromate pretreatments are often employed. Zinc alloys can also be elctrostatically painted.

Powder Coatings

Powder coating involves electrostatic spraying of the zinc castings with an epoxy or polyester powder. The parts are then immediately oven cured for a hard dureble finish. The result is an even, inexpensive, corrosion resistant plastic coating. Powder coatings are avaliable in a wide range of colours.

Source : Interzinc

TODAY´S ZINC CASTING ALLOYS are strong, durable and cost effective engineering material. Their mechanical properties compete with and often exceed those of cast aluminum, magnesium, bronze, plastics and most cast irons. These characteristics, together with their superior finishing capabilities, and choice of casting processes make zinc alloy the unquestioned material choice for the 1990´s, because they´ll save you time and money:

Assembly operations are reduced

Entire assemblies can be cast as a single unit, eliminating the need for expensive manual assembly operations.

Assembly operations are reduced

Entire assemblies can be cast as a single unit, eliminating the need for expensive manual assembly operations.

Less material in required

Zinc´s superior casting fluidity, strength and stiffness permits the design of thin wall sections for reduced weight and material cost savings.

Machining operations are reduced

Due to the superior net-shape casting capability of zinc alloys, machining can be eliminated or drastically reduced.

Faster production and extended tool life

Die casting production rates for zinc are much faster than aluminum, or magnesium. Coupled with a tool life often exceeding 1 million parts, tooling and machine usage charges are dramatically reduced.

Eliminate bearings and bushings

Zinc´s excellent bearing and wear properties allow greater design flexibility and reduce secondary fabrication costs by eliminating small bushings and wear inserts.

Choice of low, medium and high production

A variety of casting processes are available to economically manufacture any size and quantity required.

Source : Interzinc

IRILUR S. L. - Lamps and accessories for lamps, has once again put its trust in us to create and merge their new closed arms for luminaire in zamak. After months of work we can say that their new design is ready to be added to IRILUR`s catalog of products.

Unlike the majority of companies of lamps or accessories for lamps, IRILUR S. L. takes you from the years 80 using the zinc alloy "zamak", applied with success to manufacture their lighting products, obtaining forms and geometries not possible with other materials with the exception of the plastics, And by another dramatic improvements of surface finish due to its dimensional stability and smoothness to the obtainable in the surfaces, by deleting processes of filing and polishing that fatally entered, in the brass castings and bronze, and to a lesser proportion in the bilberry, controllable little variations of the originally projected forms (especially in edges and curves of small radio). This protection is obtained either with organic coatings (paints, varnishes, lacquers and enamels) or by electrolytic coatings that, in the brasses are generally of nickel and chrome, and in the case of zamak tend to be copper-nickel-chrome.

Neither must we forget the possibility that has the zamak, like the other metals and certain plastics, coatings to incorporate the tribology of PVD (Physical Vapor Deposition), CVD (Chemical Vapor Deposition) or of PECVD (enhaced Plasma Chemical Vapor Deposition) or The most recent on the basis of nickel alloys and tungsten, which in certain cases are substituting or substituted for the coatings to electrolytic nickel base and chrome that, among the other characteristics do not affect the environment or the health.