Method for making a molding core, and molding core for making a complex part made of a composite material
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United States of America Patent
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Jul 12, 2016
Grant Date -
Feb 24, 2011
app pub date -
Nov 21, 2008
filing date -
Nov 30, 2007
priority date (Note) -
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Abstract
In order to make a structure of a composite material including elongated hollow shapes, such as hollow shapes associated with stiffeners of a stiffened panel, the invention comprises making cores including a bladder made of an elastomer material. The invention relates to a method for making such extractable cores in order to obtain cores having a very important length, and allowing the use of said cores for the industrial production of composite parts. The bladder is a cylindrical bladder that is conformed in a core mould, wherein the core itself does not have to be cylindrical, before being filled with a granular material and submitted to a negative pressure in order to impart a stable shape to the core by compaction of the granular material.
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