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Describe Mould Surface Coating?
Mould surfaces are coated (after the pattern is drawn out) with certain materials possessing high refractoriness. It eliminates the possibility of burn-on and enables casting with smooth surface to be obtained. However, the permeability of the mould gets reduced. Therefore, the Coating should not contain gas forming materials. Mould surface coating which are also known as facings, dressings, washes, blackings or whitening, may be applied dry(by dusting) or wet in the form of thin cream. The various mould surface coating materials include: Coal dust, pitch, graphite, china clay, Zircon flour or French chalk (Calcium oxide).
Just-In-Time: This unit begin with the discussion of Just-In-Time strategy. Several terms used in the process are also explained. JIT is an encompassing philosophy considering
Properties of Some Fibres
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i section beam analaysise
Intermittent motion Most seam welding machine requirements are met by the use of continuous drive. However, in cases where heavy work parts are to be welded or more than a sing
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