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Slide 35 of 69
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In direct extrusion a ram forces the preheated brass billet through the die. This can be likened to squeezing toothpaste out of a tube. Using this method it is possible to extrude up to six lengths from one die.
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Direct extrusion is usually used for the manufacture of profiled sections and hollow bar products.
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Indirect extrusion is the reverse of direct extrusion, the die being forced on to the billet rather than the billet being forced through the die.