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Gated pattern is used to produce good casting. It is essential to make sure that full supply of molten metal flow into every part of the mould. Provision for easy passage of the following molten metal into the mould is called "gatting". For improving the productivity of a moulder, the hand cutting of the gates must be eliminated.
In mass production a number of castings are produced in a single mould having multi cavity, by joining a group of patterns. For this purpose the gate or runners, for the flowing of the molten meta, are formed between the individual patterns. The time spent by the moulder in cutting gates, runners and withdrawal of individual patterns is eliminated by this arrangement. Such groups of patterns with gatting system are called "Gated Patterns".
an iron ring with amean dia of 50 cm has an air gap of 1mm awinding of 200 turns if the permeability of the iron is 400 when a circuit of 1.25A flows through the coil find the flux
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Pattern Practices : A pattern may be defined as a replica or fascimile model of the desired casting which, when packed or embedded in a appropriate moulding material, creates a ca
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Q. There is no end centered tetragonal lattice in the bravis list, but there is an end centered orthorhombic lattice. Explain why this is so? Ans. A tetragonal system is
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