Thermoplastic Seat Shell Molding With In-Mold Decorative Film
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Solution Overview
Problem
Traditional manufacturing methods for composite shells, particularly for aircraft seats, are inefficient, environmentally unfriendly, and costly due to the use of thermosetting materials that are not recyclable, require multiple steps, and involve manual finishing, leading to increased production time and defects.
Innovation Solution
A single-operation process using a self-contained, regulated heated mold to integrate decoration and finish directly onto a thermoplastic multilayer structure, comprising steps of placing the structure on the mold, applying a heating membrane, vacuuming, baking, and demolding, which includes applying a decorative film during molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermosetting materials are used for composite shell manufacturing, then mechanical strength and structural stability are improved, but recyclability deteriorates and environmental impact increases
Solution Approach 1:
The patent changes the fundamental material parameter from thermosetting to thermoplastic polymer. This parameter change enables the material to be melted and reshaped, providing recyclability while maintaining mechanical strength through optimized thermoplastic composite formulations and processing parameters.
Solution Approach 2:
The patent uses composite materials consisting of thermoplastic matrices combined with fiber reinforcements (such as carbon fiber or glass fiber). This composite structure provides the necessary mechanical strength while the thermoplastic matrix enables recyclability, thus resolving the contradiction between strength and environmental impact.
2Manufacturing precision
If traditional multi-step manufacturing processes are used, then manufacturing precision is improved, but productivity deteriorates and production time increases
Solution Approach 1:
The patent merges multiple separate manufacturing operations (molding, surface finishing, and decoration application) into a single integrated step. The decorative film is applied to the mold surface before molding, so that the finished part is produced with the decoration already integrated, eliminating post-processing steps and significantly reducing production time while maintaining precision.
Solution Approach 2:
The patent performs the decoration application in advance, during the molding process itself, rather than as a subsequent step. The decorative film is placed on the mold before the thermoplastic material is formed, so the decoration is embedded in the part during manufacturing, eliminating the need for separate finishing operations.
3Manufacturing precision
If manual finishing operations are performed after demolding, then surface quality is improved, but productivity deteriorates and defect risk increases
Solution Approach 1:
The patent combines the surface finishing and decoration application into the molding process itself. By applying the decorative film to the mold before molding and using the mold's heating and vacuum systems during the process, the surface quality is achieved during manufacturing rather than through separate manual finishing operations, thereby improving productivity and reducing defect risk.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces production time and costs while improving quality and recyclability by integrating decoration and finish in a single step, ensuring even baking and decoration integration, and simplifying the manufacturing process.
Implementation Method 1
a step of applying a heating membrane directly onto the multilayer structure; a baking step at a predefined temperature
Implementation Method 2
The cooking step takes place according to a temperature profile exhibiting a constant plateau corresponding to the melting temperature of adhesive films contained in the multilayer structure
Implementation Method 3
a step of applying a vacuum in the mold by means of the heating membrane, said vacuum producing a compression of the multilayer structure
Data Source
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AI summary
The invention relates to a method (500) for manufacturing a shell (150) for an aeronautical seat, from a thermoplastic multilayer structure (100), said method being characterized in that it comprises: a step (510) of placing the multilayer structure (100) on a self-heating and self-regulating autonomous mold (300); a step (520) of applying a heating membrane (200) directly onto the multilayer structure; a step (530) of applying a vacuum in the mold by means of the heating membrane, said vacuum producing a compression of the multilayer structure; a step (540) of curing at a predefined temperature, following a cycle regulated by the mold; and a step (550) of demolding and trimming the shell (150) obtained; said method further comprising the integration of a decorative film (40) onto the multilayer structure during molding. The invention also relates to an aircraft seat cover obtained by such a process.