Learn more about our key processes
DIE CASTING 

HIGH PRESSURE DIE CASTING - COLD CHAMBER 

Sigma handles a wide range of aluminum alloys to meet customers’ requirements.
HIGH PRESSURE DIE CASTING - HOT CHAMBER 

Sigma handles a variety of alloys to meet customers’ requirements.
GRAVITY DIE CASTING 

Permanent mould casting has the advantage of offering relatively lower design and development costs as well as productions costs.
At Sigma, the Al-br parts are manufactured for high and medium voltage fuse cut-outs through permanent mould gravity die-casting process.
Raw material is tested on the spectrometer to determine its chemical composition. Manufacturing process starts with melting followed by feeding the molten metal into the casting machine. Raw cast parts go down stream process like trimming, machining and surface coating.
GREEN SAND CASTING 

These castings can vary greatly in size and weight, ranging from a couple grams to several kilograms. In general, the sand casting process involves the use of a melting furnace, liquid metal, pattern and sand mold where molten metal poured under gravity into sand moulds. The patterns are designed and made in in-house tool room. Sigma is capable to produce sand castings out of Cu, Zn, Al alloys and cast iron.
Sigma has “Sinto” Japan make automated high pressure molding lines. The high pressure molding lines are capable to produce 120-180 molds / hr and capable to cast parts up to 20 kg. Sigma is equipped with Induction furnaces, CNC and VMC machines, heat treatment capacity, plating and powder coating facilities.
SURFACE FINISHING - POWDER COATING 

Sigma’s powder coated products attain good mechanical properties and pass demanding impact, abrasion resistance and hardness tests complying with the UL standards.
SURFACE FINISHING - LIQUID PAINTING 

SURFACE FINISHING - ELECTROPLATING 

The plant production capacity is 400 MT/month.
