Gravitiy casting non-ferrous metals

Our gravity die castings manufacturing capabilities, which was created to integrate with our medium volume production casting projects, enables us to be incredibly competitive on all gravity die castings projects.

Our foundary for non-ferrous metals offers capacities for gravitational casting of aluminium, copper and zinc (Al, Cu and Zn) and their alloys.
Casting in mold (kokile), as well as casting in natural sand is mostly used forming technics in gravity casting.

Casting Alloys:

• Aluminum
• Aluminum bronze
• White bronze
• Tin Bronze
• Red cast
• Brass
• White metal

SAND CASTING

This technological process is one of the oldest and most widely used, and is intended for castings of complex configuration and small series. Due to the slow degree of crystallization, the quality of the castings is somewhat lower compared to other casting processes. With this casting process, dendritic crystallization and the appearance of non-metallic inclusions are possible, and for this reason, when it comes to castings of high performance and characteristics, one switches to other technological casting processes.

GRAVITY CASTING IN METAL MOLDS – Kokile

Casting in metal molds has a very wide application, primarily for aluminum alloys. Castings produced by casting in metal molds are used practically in all industries. The advantages of casting in metal molds compared to casting in sand molds are better mechanical properties due to faster removal of heat from the melted part through the metal mold, which enables the casting to harden in a shorter time, thus forming a fine-grained structure of the casting; higher dimensional accuracy and better surface quality of castings and more economical production.

CENTRIFUGAL CASTING

The idea of using centrifugal force proved to be a suitable procedure for making a quality and compact castings. During the technological process, a melt is poured in, which hardens and forms a casting in the mold cavity. The mold rotates around its axis and is acted upon by the centrifugal force and the force of the earth’s gravity. Centrifugal force affects not only the shape, but also the properties of the casting. Under the influence of centrifugal force, which is sometimes two hundred times greater than the weight of the poured melt, non-metallic inclusions from the melt float to the surface faster than under the influence of gravity alone. Due to all of the above, centrifugal castings have fewer inclusions and are less porous compared to castings obtained by sand casting and gravity casting.

ARTISTIC CASTING

It represents the art of casting metal into molds of complex shapes and configurations, whereby castings are obtained in the form of: statues, figures, logos, interior and exterior elements. These castings are primarily characterized by a complex form, surface quality and constructability without special requirements related to physical and mechanical properties. Cooperations with academic sculptors creates castings of artistic value according to their suggestions. It is also possible to cooperate according to the requirements of a third party.

SLIDE BEARINGS

We have experience in the production of sliding bearings of small, medium and large sizes. In the process of pouring white metal on steel and bronze liners and in the process of making sliding bearings, we apply the technological procedures of gravity and centrifugal casting. White metal alloys are made in accordance with European standards. They are divided into the tin group and the lead alloy group. Chemical, mechanical and usage characteristics are described in the table in the gallery.