B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 3/12 (2006.01) B32B 37/00 (2006.01)
Patent
CA 2618886
The invention relates to a method for producing sandwich components comprising an open core structure (2) and cover layers (1, 3) that are applied to both sides, said layers (1, 3) being formed using a curable plastic material and the sandwich component being cured under pressure in a closed device. According to the invention, a filling gas, in particular nitrogen or air, is introduced into the core structure (2) prior to the at least partial solidification of the cover layers (1,3) and a filling gas pressure pFilling gas is selected that is less than or equal to the working pressure p Working of the closed device, notably to prevent to a great extent the formation of sink marks in the cover layers (1, 3). The control of the filling gas pressure p Filling gas of the filling gas in the core structure (2) in an appropriate manner during the curing process of the sandwich component enables sandwich components with almost optimum surface characteristics to be produced, in particular without the formation of sink marks in the cover layers (1, 3) of the core structure (2), (which are often caused by a negative pressure that occurs in the cells of the core structure (2) as a result of the cooling process). This obviates the need for the previously required complex mechanical after-treatment of the sandwich component, for example by grinding or filling. The invention also relates to a press for carrying out said method.
L'invention concerne un procédé de fabrication de composants sandwich présentant une structure centrale (2) et des couches de couverture (1, 3) appliquées bilatéralement, les couches de couverture étant réalisées dans un matériau plastique durcissable, et le composant sandwich étant durci sous pression dans un dispositif fermé. Avant durcissage au moins partiel des couches de couverture (1, 3), un gaz de remplissage, notamment de l'azote ou de l'air est introduit dans la structure centrale (2), la pression Pgaz du gaz de remplissage étant inférieure ou égale à une pression Ptravail de travail dudit dispositif fermé afin d'éviter notamment la formation de cavités dans les couches de couverture (1, 3). La commande adéquate de la pression du gaz de remplissage dans la structure centrale lors du processus de durcissage des composants sandwich permet de fabriquer des composants sandwich présentant des propriétés de surface quasi optimales, notamment sans formation de cavités dans les couches de couverture (1, 3) de la structure centrale, se formant notamment par une dépression due au refroidissement dans les cellules de la structure centrale (2). De ce fait, il est possible de s'affranchir de l'usinage mécanique ultérieur des composants sandwich, notamment par rectification ou par rebouchage. L'invention concerne également une presse destinée à la mise en oeuvre du procédé.
Busch Heinz-Peter
Hesse Karsten
Airbus Deutschland Gmbh
Airbus Operations Gmbh
Borden Ladner Gervais Llp
LandOfFree
Method for producing sandwich components and corresponding... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing sandwich components and corresponding..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing sandwich components and corresponding... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1625765