Thermo-formable Inlay with Adhesive and Releasable Foil
Solution Overview
Problem
The existing methods for manufacturing three-dimensional inlay parts for vehicle interior trim parts are either time-consuming and prone to errors due to manual arrangement of two-dimensional blanks or require significant investment in automation and machinery, such as spraying devices, which can be costly and inefficient.
Innovation Solution
A process involving a thermo-formable main layer with an adhesive layer and a releasable foil, which is formed into a three-dimensional inlay part using a forming unit, reducing the need for manual assembly and costly machinery, while ensuring precise alignment and reduced scrap rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual arrangement of two-dimensional fleece blanks is used, then flexibility in design is maintained, but the manufacturing process becomes time-consuming and generates more scrap
Solution Approach 1:
The adhesive layer is applied to the fleece blank before the forming process, and the releasable foil is applied to protect the adhesive layer. This preliminary preparation allows the adhesive to be positioned correctly before the blank is formed into its three-dimensional shape, eliminating the need for time-consuming manual arrangement after forming while maintaining design flexibility through the initial layout choices
Solution Approach 2:
The patent transitions from working with flat two-dimensional fleece blanks that require post-forming arrangement to a process where the adhesive layer is applied in advance and the entire assembly is formed together. This dimensional transformation allows the adhesive to conform to the three-dimensional shape during forming, eliminating the need for manual positioning while maintaining design adaptability
2Productivity
If adhesive layer is applied before forming, then assembly is simplified and cycle time is reduced, but the adhesive must withstand forming conditions without premature activation
Solution Approach 1:
The releasable foil acts as an intermediary protective layer between the adhesive layer and the forming environment. It prevents the adhesive from premature activation or contamination during the high-heat forming process, while allowing the adhesive to remain in position and ready for bonding after forming is complete, thus enabling both fast cycle times and reliable adhesive performance
Solution Approach 2:
The patent utilizes controlled temperature and pressure parameters during the forming process that are sufficient to form the fleece blank but controlled to prevent premature adhesive activation. The adhesive layer is selected and applied in a way that its activation threshold is above the forming conditions, allowing the adhesive to remain dormant during forming and activate only during the subsequent bonding operation
3Extent of automation
If spraying devices are used for adhesive application, then automation level increases, but investment costs become high
Solution Approach 1:
The patent uses a cost-effective alternative to expensive automated spraying devices by applying the adhesive layer using simpler, less costly methods before forming. The adhesive is applied in a controlled manner that doesn't require complex automation, and the releasable foil serves as a disposable protective element that simplifies the overall process while reducing machinery investment requirements
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 process simplifies the assembly of interior trim parts by facilitating the formation of precise three-dimensional inlay parts with reduced cycle time and investment costs, while maintaining high quality and repeatability.
Implementation Method 1
forming the thermo-formable main layer into a three-dimensional inlay part by applying pressure by means of the forming unit
Implementation Method 2
an adhesive layer is applied on the rear side
Data Source
Figure 1
Figure 2
Figure 3A~3C2
AI summary
The present invention relates to a process for manufacturing a three-dimensional inlay part (10) for an interior trim part (58) of a vehicle (12), comprising the steps of providing a thermo-formable main layer (14) having a decor side (18) and a rear side (16), wherein an adhesive layer (20) is applied on the rear side (16), and a releasable foil (22) is applied on the adhesive layer (20), inserting the thermo-formable main layer (14) including the adhesive layer (20) and the releasable foil (22) into a forming unit (26), forming the thermo-formable main layer (14) into a three-dimensional inlay part (10) by applying pressure and heat by means of the forming unit (26), and removing the three-dimensional inlay part (10) from the forming unit (26). Moreover, the present disclosure is directed to a three-dimensional inlay part (10) for an interior trim part (58) of a vehicle (12).