Drawing apparatus and drawing method
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United States of America Patent
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Oct 5, 2010
Grant Date -
Aug 6, 2009
app pub date -
Dec 30, 2008
filing date -
Feb 6, 2008
priority date (Note) -
Expired
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Abstract
A drawing apparatus is capable of releasing a material, the inner surface of which has been formed into a concavo-convex shape with drawing, from a mold with excellent release performance, even in the case where the concavo-convex part formed in the inner surface of the product is of a shape causing it to get caught in the direction of pulling out of the product against the mold. The mold is formed in a split structure having a concavo-convex surface shape and is contractible in diameter after the forming of the material.
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