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Q. Describe Direct extrusion?
• Direct extrusion, also known as forward extrusion, is the most common extrusion process.
• It works by placing the billet in a heavy walled container.
Fig Direct extrusion
• The billet is pushed through the die by a ram or screw. There is a reusable dummy block between the ram and the billet to keep them separated.
Q. Explain Fundamental of metal casting? (1)Melting the material (2)Allowing the molten metal to cool and solidify in the mould "A plane where the castings are made is ca
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Brazing is a technique of joining two similar of dissimilar metal pieces together by heating the surfaces and by using a non-ferrous filler metal having its melting point above 42
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