The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2001
Filed:
Jun. 19, 1998
Arno Pabsch, Braunschweig, DE;
Christof Sigle, Braunschweig, DE;
Matthias Piening, Braunschweig, DE;
Deutsches Zentrum fur Luft-und Raumfahrt e.V., Cologne, DE;
Abstract
In a process for producing large-surface structural elements from fiber-reinforced composite materials by resin transfer moulding, a mold (,) that can be evacuated has a dimensionally stable part (,) and an elastically deformable part (,). The mold (,) has connections for injecting a resin mixture and connections to a pressure sink. A fibrous fabric (,) is set into the mold (,). Elongated pipes having a large supporting surface (,) and a cavity (,) that extends in the longitudinal direction of the pipes above the supporting surface (,) are provided on the surface of the fibrous fabric (,) opposite to the dimensionally stable mold part (,) to inject the resin mixture and to ensure the connection with the pressure sink. The supporting surface (,) of the pipes has a narrow slit (,) which extends substantially over the whole length of the pipes and which is in communication over its whole length with the cavity (,). At least one end of the pipes extends outwards through the edges of the elastically deformable and dimensionally stable mold parts and is linked to the resin supply pipe or to the pressure sink. The mold (,) is evacuated down to an inner pressure of less than 50 hPa.