• Sajjan Precision Castings

Castings

Sajjan Precision Castings manufactures a wide range of Castings. A foundry can be largely segregated into three cycles, viz., sand, box and metal. Quality of castings starts from order acceptance, when the quality plan is finalised, which ensures pattern compatibility CAD/CAM designing of drawings, methoding of casting, melting and moulding techniques. Hence pattern inspection records, method cards are prepared before actual production. Once the plan is in place the inputs are ensured for quality by fixing check parameters which is broadly covered in inspection manuals. For instance sand is checked for AFS NO, grain shape, sintering point, distribution etc. All ferro alloys are checked for its che mical analysis. This is how quality of the moulds and liquid metal – the two prime parameters of casting quality, is assured. Checking procedures for sand preparation, moulding, coremaking, heating coating and closing are dealt in detail in the respective manuals. Melting activity is completely covered in melting manual where chemistry is ensured by spectro analysis. After the mould is ready mould inspection records are maintained which also records pouring temperatures paving the way for total quality assurance of correct liquid metal transforming into acceptable casting. The castings are inspected for dimensions with sophisticated instruments ensuring dimensional compatibility. The mechanical properties are checked with the help of universal testing machine. Non destructive testing is also carried out for conformance to such requirements of the customer. The casting finish is ensured by state of the art sand blasting shot blasting and other fettling tools for dressing.