Moulding Film Surface Layer for Resin-Infused Parts
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Solution Overview
Problem
Existing methods for producing three-dimensional molded parts with specific surface appearances or properties require separate post-molding treatments like sanding, coating, and painting, which are cumbersome and inefficient.
Innovation Solution
Introducing a pre-existing film with a dry layer of paint-like material anchored in a particulate backing between the mold and the part during the molding process, allowing the resin to anchor within the backing, thereby integrating a decorative or functional surface layer directly into the molded part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate post-molding treatments (sanding, coating, painting) are used to achieve specific surface appearances or properties, then the desired surface quality is obtained, but the manufacturing process becomes cumbersome and inefficient
Solution Approach 1:
The patent merges the surface coating layer with the mold itself by applying a paint-like material to the mold surface before molding. This integration eliminates separate post-molding coating operations, as the surface layer is formed simultaneously with the part during the molding process, thereby reducing manufacturing complexity while maintaining surface quality
Solution Approach 2:
The paint-like material is applied to the mold surface in advance before the molding operation. This preliminary action ensures that the surface coating is already in place on the mold, so when the material is molded, the surface layer is transferred to the part automatically, eliminating the need for subsequent coating steps
2Productivity
If a pre-existing film with paint-like material is interposed between the mold and the part during molding, then the manufacturing process is simplified by direct embedding of the surface layer, but significant mechanical and thermal stresses are involved
Solution Approach 1:
The patent employs a flexible film containing paint-like material that can accommodate the mechanical and thermal stresses of the molding process. The film's flexibility allows it to deform with the mold during curing and cooling without cracking or delaminating, ensuring reliable transfer of the surface layer to the final part
Solution Approach 2:
The film is constructed as a composite material system combining a flexible substrate with embedded paint-like material. This composite structure provides both the mechanical flexibility needed to withstand molding stresses and the functional properties of the paint layer for achieving desired surface appearances
3Ease of manufacture
If a pre-existing film with dry layer of paint-like material is used, then the surface layer is directly embedded into the molded part, but the film must remain stable despite significant stresses during molding
Solution Approach 1:
The patent utilizes parameter changes in the film's physical and chemical properties to maintain stability during molding. The film's glass transition temperature, cross-linking density, and other parameters are optimized to ensure the film remains dimensionally stable and adheres properly to the mold surface throughout the temperature and pressure variations of the molding cycle
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
This approach simplifies the manufacturing process by directly embedding a decorative or functional surface layer into the molded part, reducing the need for post-molding treatments and ensuring a robust bond between the resin and the paint layer.
Implementation Method 1
a pre-existing film comprising a dry layer of a paint-like material anchored in a particulate file could behave very stably when interposed between the mold and the part being formed
Data Source
Figure 1~1A
Figure 2~3
Figure 4A~4C
AI summary
A method for manufacturing a component comprises the following steps: - providing a mould (100) which defines a moulding zone, of which at least one wall (101) is intended to define a finished surface of the component; - arranging against the wall a film (200) which is prepared in advance and which comprises a dry layer (201) made of a paint-type material and anchored in a particular backing (202), the paint-type material being in contact with the wall and the particular backing being directed towards the moulding zone, - filling the moulding zone with a viscous moulding material (500) which can cure, under such conditions that the fibrous material of the film and the moulding material penetrate one another, - causing the moulding material to cure, and - removing the article from the mould. The invention is mainly applicable in the manufacture of components by resin infusion.