Method for manufacturing a part made of composite material comprising at least one step of detecting pieces of protective film

Patent metadata

Field	Value
Publication number	US-2021237371-A1
Application number	US-202117166792-A
Country	US
Kind code	A1
Filing date	Feb 3, 2021
Priority date	Feb 5, 2020
Publication date	Aug 5, 2021
Grant date	—

Abstract

A method for manufacturing a part made of composite material, comprising at least one step of detecting any protective films or pieces of protective films via particles present in the protective film, before a polymerization step.

First claim

1 . A method for manufacturing a part made of composite material, the part made of composite material comprising:
a stack of layers of fibers from fiber plies,
a fiber ply comprising at least one layer of fibers and also at least one protective film covering at least one face of the layer of fibers, and
at least one matrix of at least one material,
the protective film comprising particles, embedded in the matrix of the protective film, having at least one physical characteristic different from those of the fibers of the layer of fibers, said physical characteristic being detectable by at least one suitable sensor and the particles being uniformly distributed over an entire area of the protective film,
the manufacturing method comprising:
laying up layers of fibers from fiber plies,
removing a protective film for each fiber ply, and
polymerizing or consolidating the material,
before the polymerizing or consolidating step, at least one step of detecting the particles of the protective film or piece of the protective film possibly present on at least one laid-up layer of fibers.

2 . The method for manufacturing a part made of composite material as claimed in claim 1 , wherein the manufacturing method comprises several detection steps during the laying up step, a detection step after each positioning of a layer of fibers.

3 . The method for manufacturing a part made of composite material as claimed in claim 1 , wherein the several detection steps comprise moving, above a final positioned layer of fibers, at least one sensor configured to detect at least one of the particles.

4 . The method for manufacturing a part made of composite material as claimed in claim 3 , wherein the sensor is a magnetic sensor or an inductive sensor.

5 . The method for manufacturing a part made of composite material as claimed in claim 3 , wherein the at least one sensor is moved so as to run over an entire area of the final positioned layer of fibers to detect a particle regardless of its position on the layer of fibers.

6 . The method for manufacturing a part made of composite material as claimed in claim 4 , wherein the particles are magnetic.

7 . The method for manufacturing a part made of composite material as claimed in claim 6 , wherein the particles exhibit a permanent magnetization or are configured to become magnetic in a presence of a magnetic field.

8 . The method for manufacturing a part made of composite material as claimed in claim 2 , wherein the particles have a density such that a piece of protective film having an area of about 25 mm2, regardless of its position in the protective film, is detectable.

Assignees

• Airbus Operations Sas

Inventors

• Cabot Jean-Pascal
• Kern Xavier

Classifications

• B29C70/54

  Component parts, details or accessories; Auxiliary operations {, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing} · CPC title

• B32B2260/021

  Fibrous or filamentary layer · CPC title

• B32B5/024 Primary

  Woven fabric · CPC title

• B32B2260/046

  Synthetic resin · CPC title

• B32B27/12

  next to a fibrous or filamentary layer · CPC title