Foam Insert Molding With Elastic Holding for Exposed Interfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing foam molding processes become complex and costly when attempting to create a mechanical interface by having part of an embedded insert emerge from the foam, as they require barriers within the mold cavity to seal off the emerging part.
Innovation Solution
A foam molding process where the insert is held under elastic stress against the mold's inner surface, allowing its surface to remain uncovered by foam, using a notch with angled segments to maintain the insert's position and magnets for stabilization, enabling the insert to emerge and facilitate mechanical attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a barrier is installed within the mold cavity to seal off the emerging part of the insert, then the insert can emerge from the foam to provide a mechanical interface, but the foam molding process becomes more complex and costly
Solution Approach 1:
The emerging portion of the insert is extracted from the foam material, allowing it to protrude from the molded article. This is achieved by positioning the insert such that a portion extends beyond the mold cavity boundary, eliminating the need for complex barrier structures while maintaining the mechanical interface function.
Solution Approach 2:
The insert is pre-positioned in the mold cavity before foam injection, with its emerging portion already oriented correctly. This preliminary positioning ensures that the insert emerges from the foam in the desired location and orientation without requiring additional barrier structures or post-processing steps.
2Manufacturing precision
If the insert is held under elastic stress against the mold's inner surface, then the insert's surface remains uncovered by foam and emerges from the foam, but the insert requires additional positioning mechanisms
Solution Approach 1:
The mold cavity includes a curved or recessed portion that receives and holds the insert in its desired position. This geometric feature of the mold itself provides positioning and retention of the insert without requiring additional active positioning mechanisms, achieving precise placement through the mold's geometry.
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 and cost-reduces the foam molding process while ensuring the insert's surface emerges from the foam, enabling stable mechanical interfaces for attachments like occupancy detection sensors in seat cushions.
Implementation Method 1
the insert is held under elastic stress against an inner surface of the mold
Implementation Method 2
it may be magnetically held to maintain a correct position during the foam molding step
Data Source
Figure 1~3
Figure 4~5
Figure 6~9
AI summary
The present invention concerns a process for manufacturing a foam article (1) with an embedded insert (3). The process comprises a foam molding step in which a foam material (2) is molded within a mold (20) while the insert (3) is held under elastic stress against an inner surface of a mold (20).