Integrated Glass-Run Corner Structure for Stable Door Sealing
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Solution Overview
Problem
The groove structure of existing glass runs in automobiles, where the groove body and corner portion are joined with a mounting block, leads to easy separation of these components.
Innovation Solution
A corner structure with a glass-run body and a hollow sealing part that are integrally molded, featuring a core removal hole on the vehicle's interior side and a slit connected to the core removal hole, allowing for easy core extraction without damaging the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the groove body and corner portion are joined using a mounting block to facilitate assembly, then the assembly process becomes easier, but the joined components can easily come apart
Solution Approach 1:
The groove body and corner portion are integrally molded as a single piece, eliminating the separate mounting block and joint interface. This merging of components ensures they cannot come apart while maintaining ease of assembly as a single unit is installed.
Solution Approach 2:
The mounting block is completely removed from the structure by integrating its function into the molded corner portion. The corner portion itself provides the mounting capability without requiring a separate block, thus eliminating the joint that could fail.
2Reliability
If the sealing part is made hollow to improve sealing performance, then the sealing capability increases, but the manufacturing complexity increases
Solution Approach 1:
The hollow sealing part is integrated into the corner portion through integral molding, combining the sealing function with the structural component. This eliminates the need for separate sealing elements while maintaining the hollow configuration for enhanced sealing performance.
Solution Approach 2:
The sealing part is designed with a hollow configuration that changes its physical parameters to improve sealing. The hollow structure allows for compression and deformation characteristics that enhance the sealing effect against the door glass and frame.
3Ease of manufacture
If a core is inserted in the sealing part for molding, then the hollow sealing part can be formed, but the core must be carefully removed without damaging components
Solution Approach 1:
A core removal hole is pre-formed in the corner portion at a location that provides safe access for core extraction. This preliminary feature is designed into the molding process to guide the core removal operation and prevent damage to the sealing part and glass-run body.
Solution Approach 2:
The core removal hole serves as an intermediary pathway that allows the core to be extracted safely from the hollow sealing part. By providing this dedicated access route, the core can be removed without directly contacting or damaging the molded components.
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
The solution prevents separation of the glass-run body and sealing part, ensuring high contact tightness, superior sealing performance, and maintaining the automobile's aesthetic appeal while facilitating automated core removal.
Implementation Method 1
forming, by extrusion molding, a hollow sealing part configured to fill a parting portion
Implementation Method 2
the glass-run body and the sealing part are integrally molded
Data Source
AI summary
To provide a corner structure capable of making a glass-run body and a sealing part difficult to come apart. A corner structure (1) of a glass run configured to be attached to an automobile, includes: a glass-run body (2) configured to be attached to a periphery of a door of the automobile; and a hollow sealing part (3) configured to fill a parting portion which is present between a front door and a rear door of the automobile, or a parting portion which is present between the rear door and a vehicle body of the automobile. The glass-run body (2) and the sealing part (3) are integrally molded.