Integrated Crash Pad Airbag Door Molding
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Solution Overview
Problem
Conventional crash pads for vehicles suffer from molding defects and poor airbag deployment performance due to foam solution leakage at connections and rearward pushing force causing tears in the airbag cushion during deployment.
Innovation Solution
An integrated crash pad design where the airbag door, housing, and core are monolithically molded using double injection, with a hinge mechanism and delayed injection molding of the airbag door resin to form a rigid and flexible connection, eliminating the need for separate mounting brackets and post-processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate airbag door and housing are assembled together, then assembly flexibility is improved, but molding defects occur due to foam solution leakage at connections
Solution Approach 1:
The airbag door and housing are merged into a single integrally molded component, eliminating the connection interface that causes foam solution leakage. The patent describes an airbag housing where the door is formed as one piece with the housing body, preventing the molding defects associated with separate assembly while maintaining the necessary functional separation through internal design features.
2Ease of manufacture
If separate airbag door and housing are assembled together, then manufacturing flexibility is improved, but production complexity increases due to multiple components
Solution Approach 1:
The patent integrates the airbag door and housing into a single molded part, reducing the total component count and eliminating assembly steps. This merging approach simplifies the overall device structure while maintaining manufacturing flexibility through the molding process itself, which can accommodate complex geometries in a single operation.
3Force
If airbag cushion is pushed rearward during deployment, then deployment force is improved, but airbag cushion tears due to hook holder contact
Solution Approach 1:
The patent removes the hook holder component entirely from the design. By integrating the door and housing into a single piece, the separate hook holder that causes tearing during deployment is eliminated. The airbag cushion can be pushed rearward during deployment without encountering the tearing issue, as the integration redesigns the force transmission path to avoid concentrated stress points.
4Adaptability or versatility
If multiple separate components are used, then design flexibility is improved, but external appearance deteriorates due to connection gaps
Solution Approach 1:
The integration of door and housing into a single molded part eliminates visible connection gaps and seams, providing a smooth, continuous external surface. This merging maintains design flexibility through the ability to incorporate complex geometries and features within the single part design, while simultaneously achieving superior external appearance without the visual disruption of assembly joints.
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
Enhances airbag deployment performance, prevents molding defects, and improves the external appearance by ensuring proper integration and reduced weight and cost through simultaneous molding and omission of additional components.
Implementation Method 1
an airbag door integrally injection-molded with the main body selectively to open and close the space in the airbag housing
Data Source
AI summary
A crash pad for a vehicle having an integrated airbag door and housing may include a main body including a crash pad core, and an airbag housing integrally formed at a center of the crash pad core defining a space for accommodation of an airbag cushion therein, and an airbag door integrally injection-molded with the main body selectively to open and close the space in the airbag housing, the molded airbag door disposed upright in a direction in which the molded airbag door may be discharged from a mold to open the airbag housing.