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SIGMA’s latest investments in finishing equipment

SIGMA controls all the steps leading to the production of refractories and has recently invested again in finishing with two additional double-disc grinding machines, one in Plovdiv, the other one in Locate Varesino.

The company’s plants are now equipped with:

Nr. 5 double-disc laser centring grinding machines (3 in Plovdiv and 2 in Locate)
Nr. 5 five-axis numerical control workstations (3 in Locate and 2 in Plovdiv)
Nr. 6 cutting machines (4 in Plovdiv e 4 in Locate)

Additionally, we have 3 dedicated areas (2 in Locate and 1 in Plovdiv) for pre-assembly and inspection.

This state-of the-art equipment allows us to expedite grinding and pre-assembly operations both for forehearths & working ends and bottom paving both on an emergency basis or for any new orders.

Sigmaref Plovdiv
Plovdiv Materials


SIGMA generally attend the major exhibitions, conferences and events planned throughout the year to build relationships and network with the Glass Industry personnel from all over the world, keep in touch with developments in refractories as well as find new business opportunities.

The 32nd China International Glass Industrial Technical Exhibition

China Glass is a dedicated trade show that offers matchless opportunities and insights into China vibrant glass industry.

The next edition of Glassman Asia will take place for the first time in South Korea after the latest editions in Bangkok and Jakarta in 2018 and 2019. It is a leading event for the hollow and container glass manufacturing industries attracting visitors from all the neighbouring areas.

afgm 2023

The annual gathering of glass manufacturers, suppliers and stakeholders in Asia

The largest glass manufacturing conference in North America, where glass manufactures & suppliers meet.

Glassman Latin America is an international exhibition and conference for the hollow glass manufacturing industry where to discover and discuss the latest issues surrounding the sector.

The world’s leading trade fair for the glass industry where glass manufactures and suppliers from all over the world meet and discuss the latest issues.