Weatherstrip Fixing Structure Using Insertion Plate
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Solution Overview
Problem
The existing weatherstrip fixing structures face challenges in maintaining the shape and size of the hollow portion after the core removal hole is closed, which affects sealability, and require adhesive application, complicating design and potentially degrading the appearance due to the need for an additional attachment member that struggles to follow curved surfaces.
Innovation Solution
A weatherstrip fixing structure that uses an attachment member with an insertion plate portion to close the core removal hole, eliminating the need for adhesive and allowing the attachment member to maintain the core removal hole's width, thereby simplifying design and maintaining sealability on curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the core removal hole is closed with an adhesive, then the core member can be removed after molding, but the hollow portion must be deformed causing shape and size changes that affect sealability and complicate design
Solution Approach 1:
The core removal hole is formed during the molding process itself, allowing the core member to be removed without subsequent deformation or adhesive application. The hole is preliminarily created in the mold design, enabling direct core extraction while maintaining the hollow portion's original shape and dimensions.
Solution Approach 2:
The core member is extracted through the core removal hole without requiring deformation of the hollow portion. The hole provides a direct extraction path, separating the core removal function from the hollow portion structure, thus maintaining manufacturing precision while enabling ease of manufacture.
2Ease of manufacture
If an adhesive is used to close the core removal hole, then the core member can be removed, but adhesive application is required which reduces workability and may degrade appearance
Solution Approach 1:
The core member is extracted through the core removal hole without requiring any subsequent closing operation. The extraction path is built into the mold design, allowing direct removal without adhesive application, thus maintaining both ease of manufacture and ease of operation.
3Ease of operation
If an elongated-plate-like attachment member is provided separately, then adhesive application is avoided, but the attachment member and extruded weatherstrip body cannot follow surfaces with small curvature
Solution Approach 1:
The attachment member is merged with the extruded weatherstrip body to form an integrated structure. This combination allows the unified component to flex and conform to curved surfaces while eliminating the need for separate adhesive application, thus improving both ease of operation and adaptability.
Solution Approach 2:
The attachment member and weatherstrip body are formed as a composite structure with different material properties optimized for their respective functions. The attachment portion provides structural integrity for mounting, while the weatherstrip portion maintains elasticity for sealing, and together they can follow curved surfaces.
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 solution ensures consistent sealability and appearance by maintaining the core removal hole's width without adhesive, facilitating easier design and effective attachment on curved surfaces.
Implementation Method 1
the hollow portion is elastically deformed by being sandwiched between the edge of the door and the edge of a vehicle body opening
Data Source
AI summary
A portion of a peripheral wall of a hollow portion receiving a compression load when a door is closed has a slit-shaped core removal hole through which a core member used to mold the inner surface of the hollow portion is removed from the hollow portion. An attachment member has an insertion plate portion to be inserted into the core removal hole. The thickness of the insertion plate portion is set to be substantially equal to the width of an opening of the core removal hole.