Method for immobilising a preform in a mould
AssigneeSnecma
InventorsNicolas Ashtari, Marc-Emmanuel Techer
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a turbine-engine blade from a preform made from polymerized composite material in a mold comprising a bottom part and a top part, comprising at least one closure step during which the top part of said mold is attached to the bottom part of the mold containing the preform, wherein it comprises, prior to said closure step, at least one insertion substep during which a first end of an immobilization element is inserted in a bottom part of the preform in a substantially transverse direction, and a positioning substep during which a second, opposite end of said element is disposed in a complementary reception cavity emerging in the bottom part of the mold.
Claims10
Method for manufacturing a turbine-engine blade made from composite material, the method comprising:
- producing a preform of general axial orientation, by weaving threads in three dimensions, said preform comprising a blade root part and a blade vane part;
- placing the preform in a bottom part of a mold, a recess of which is substantially complementary to bottom parts of the blade root part and of the blade vane part of the preform;
- closing the mold, consisting of attaching a top part of said mold, a recess of which is complementary to top parts of the blade root part and of the blade vane part of the preform, on the bottom part of the mold containing the preform;
- compacting the preform in said mold:
- and
- injecting a resin into the mold under vacuum in order to impregnate the compacted preform and to form a rigid blade after polymerization of the resin,
- wherein, prior to closing the mold, the method further comprises
- inserting a first end of an immobilization element in a bottom part of the preform in a substantially transverse direction;
- and
- positioning a second, opposite end of said element in a complementary reception cavity emerging in the bottom part of the mold.
Immobilization element able to cooperate firstly with a preform of general axial orientation, obtained by three-dimensional weaving of threads made from composite materials, of a turbine-engine blade, and secondly with a mold for impregnating said preform, wherein the immobilization element comprises a first end able to be inserted in the weaving of the preform and a second, opposite end able to project out of the preform and to cooperate with the mold, said immobilization element being configured so as to cooperate with said preform and with said mold for placing said preform in said mold and during the impregnation of said preform in the mold.
Impregnation mold for manufacturing a turbine-engine blade made from composite material, comprising a bottom mold part, a recess of which is substantially complementary to a bottom part of a blade preform, and a top part, a recess of which is substantially complementary to a top part of the blade preform, said top part being able to be attached to said bottom part, wherein the bottom part comprises at least one cavity emerging inside the recess, which is complementary to an immobilization element secured to the blade preform, and which is able to provide reception thereof.
Dependencies are inferred from the claim text.