Method for Applying a Coating to a Molded Part Made of Fiber-Reinforced Plastic

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The invention describes a method for applying lacquer to molded parts made of fiber-reinforced plastic, especially those with complex three-dimensional shapes. The process uses an in-mold coating technique, where the lacquer is injected and distributed in the mold with the help of a vacuum applied at the overflow channel, while simultaneously controlling the mold temperature. This ensures flawless coating even in areas with difficult geometries. The technique is particularly suited for lightweight structural components approved for aviation that are manufactured by resin injection methods.

Use CasesContent extracted from patent full text and abstract with AI.

• Coating complex-shaped fiber-reinforced plastic components used in the aerospace industry
• Surface finishing of lightweight structural parts produced by resin injection molding
• Manufacturing of high-quality, visually appealing parts for automotive, marine, or sports equipment industries
• Protective and decorative coating of composite components with intricate designs or undercuts

BenefitsContent extracted from patent full text and abstract with AI.

• Ensures flawless, even lacquer application on complex 3D shapes, including hard-to-reach areas
• Reduces occurrence of surface defects such as air bubbles or uneven coverage
• Improves surface quality and appearance of the final part
• Suitable for aviation-approved lightweight structures, ensuring regulatory compliance
• Allows integration of coating into the molding process, reducing process steps and potential handling damage
• Enhances durability and protection of composite parts against environmental factors

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

Die Erfindung betrifft ein Verfahren zur Applikation eines Lackes auf einem Formteil aus faserverstärktem Kunststoff, das es ermöglicht, räumlich komplexe Formteile (3) – auch in Umbugbereichen – oberflächenfehlerfrei zu beschichten. Das Verfahren wird gemäß einem In-Mould-Coating Prozess durchgeführt, wobei während der Lackinjektion das Einfüllen des Lackes in das Formwerkzeug durch Anlegen eines Unterdruckes am Überlaufkanal (1.1) des Formwerkzeuges unterstützt wird; gleichzeitig erfolgt die Temperierung des Formwerkzeuges. Besonders geeignet ist das Verfahren für die Applikation von Lacken auf luftfahrtzugelassenen Leichtbaustrukturbauteilen, die mittels Harzinjektionsverfahren hergestellt wurden.