Seat Belt Guide Anchor Assembly for Molding Alignment Stability
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Solution Overview
Problem
Conventional guide anchor manufacturing processes for seat belts often result in misalignment between components during molding and a high frequency of defective products due to unstable coupling forces and complex manufacturing difficulties.
Innovation Solution
A method for manufacturing a guide anchor that involves temporarily fixing the guide plate to the guide piece, forming a cover with eaves and a second molded part with a recess, and using injection molding to create a first molded part that securely engages the cover and second molded part, reducing misalignment and ensuring firm assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the guide piece is temporarily coupled to the guide plate by resilient press-fitting before injection, then the components can be assembled before molding, but misalignment between components occurs during molding due to unstable coupling force
Solution Approach 1:
The guide piece is temporarily fixed to the guide plate before injection molding, establishing the correct spatial relationship and alignment in advance. This preliminary positioning ensures that when the resin is injected, the components remain properly aligned without requiring complex real-time adjustment mechanisms during the molding process.
Solution Approach 2:
A temporary coupling mechanism acts as an intermediary between the guide piece and guide plate during the assembly phase. This intermediary structure provides sufficient holding force to maintain alignment during molding, after which it can be removed or integrated into the final product structure.
2Reliability
If latching protrusions are formed on the metallic guide plate to firmly fix the guide piece, then separation during molding is prevented, but manufacturing complexity increases and slight misalignment still occurs
Solution Approach 1:
The coupling features between the guide piece and guide plate are integrated into a unified structure. Rather than adding separate latching protrusions to the guide plate, the coupling mechanism is merged with the base structure of one or both components, reducing the total number of parts and simplifying the manufacturing process while maintaining reliable connection.
Solution Approach 2:
The temporary coupling mechanism utilizes composite construction combining metallic components (guide plate and guide piece) with the injected resin material. This composite approach allows the resin to act as both the structural bonding agent and the temporary fixing mechanism, eliminating the need for separate metal latching features.
3Ease of operation
If resilient press-fitting is used to couple the guide piece to the guide plate, then assembly is simple, but the coupling force is significantly unstable leading to misalignment
Solution Approach 1:
The coupling mechanism transitions from relying solely on elastic deformation (resilient press-fitting) to a multi-parameter system that includes geometric interlocking features, frictional contact surfaces, and resin bonding. This change in coupling parameters provides both simplicity of assembly and stable, predictable holding force throughout the molding process.
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 method significantly reduces misalignment and defective products by ensuring accurate engagement and assembly of the guide plate and guide piece, enhancing the manufacturing process's reliability and efficiency.
Implementation Method 1
a first molded part for coupling the guide plate and the guide piece
Data Source
AI summary
A guide anchor for a seat belt, and a method for manufacturing the same are disclosed. The guide anchor comprises a guide plate having a latching hole and a slide guide hole formed therein, a guide piece engaged with a lower circumference of the slide guide hole, and a first molded part for coupling the guide plate and the guide piece. The guide piece comprises a cover, and a second molded part injected into a lower surface of the cover. The second molded part has a recess formed in a longitudinal direction at a lower surface. The cover has cover eaves extending from a lower portion.