Automotive Glass Run Installation Member with Thin Connecting Wall
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing glass runs for automobile doors face challenges in assembly and appearance degradation due to the use of resin materials with high rigidity, which can lead to wrinkles and chlorosis during extrusion molding, especially when assembled on flanges with elevated parts or hemming flange parts.
Innovation Solution
The glass run design incorporates a thin part formed by a concave part on the inner side of the installation member's connecting part, which widens the angle of the opening and simplifies assembly, while the body seal lip and decorative member cover any potential chlorosis, maintaining the appearance by hiding the thin part from the outside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If resin material with high rigidity is used for the installation member, then the cross-sectional shape is maintained after assembly, but wrinkles and chlorosis occur during extrusion molding
Solution Approach 1:
The patent introduces a thin part with reduced thickness in the connecting wall of the installation member. This parameter change allows the resin material to flow more smoothly during extrusion molding, preventing wrinkles and chlorosis while maintaining sufficient rigidity for shape stability after assembly.
2Reliability
If the installation member is made with high rigidity resin, then assembly stability is improved, but appearance degradation occurs due to wrinkles and chlorosis
Solution Approach 1:
The patent extracts the problematic thick connecting wall portion and replaces it with a thin part. This removed section was the source of manufacturing defects, while the remaining structure maintains the necessary rigidity for assembly stability, thus eliminating appearance degradation without sacrificing reliability.
Solution Approach 2:
The installation member features a localized thin part only in the connecting wall area, while other portions maintain their original thickness and rigidity. This local quality change allows the specific problematic area to be optimized for smooth molding without compromising the overall structural integrity and assembly stability.
3Strength
If the glass run is assembled on flanges with elevated parts or hemming flange parts, then assembly strength is improved, but the thin part exposes chlorosis and degrades appearance
Solution Approach 1:
The patent positions the thin part on the inner side of the connecting wall, utilizing the spatial dimension to hide the potentially defective area from external view. When assembled on flanges with elevated parts or hemming flange parts, the thin part remains concealed, preventing exposure of chlorosis while maintaining assembly strength.
Data Source
AI summary
A glass run couples to an outer-cabin side of a frame and includes a body and an installation member. The body includes an outer-cabin side wall, an inner-cabin side wall and a glass run side wall. The installation member is assembled on a flange having a plurality of elevated parts formed at regular intervals, has a substantially U-shaped cross-section including the glass run side wall, a body side wall and a connecting wall and has an anchoring part formed on an inner side for receiving the plurality of elevated parts on the flange. A thin part is formed by providing a concave part on an inner side of a connecting part between the body side wall and the connecting wall of the installation member.