Production & Quality Control System

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During the casting process four samples are taken during the heat at various stages in order to provide the proper chemical composition as per standards in a stringent range. Then the rolls are removed from the mould and send for the machining process. During the machining process samples are taken for examination of microstructure and chemical analysis once again. Machining is allowed to proceed only if the microstructure is found proper. Hardness of the Rolls is checked on the barrel surface as well as the face of barrel to check the depth of useful hardness.

The machined surfaces are also examined for any surface defect like blowholes, inclusions, dross and cracks etc. Stage inspection of dimensions is carried out. A final dimensional check is carried out at the end of all machining operations. Once clearance is obtained from the Q.C department, Rolls are finally painted with antcorrosive paint and packed for shipping. In order to maintain dimensional accuracy of the rolls all measuring instruments are periodically checked for deviations against a set of standard instruments duly calibrated and certified from authorized centers.

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