Integrally Molded Slider for Vehicle Window Glass
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Solution Overview
Problem
Existing slider-equipped window glass production methods face challenges with low productivity and precision due to the use of adhesives or double-sided adhesive tapes, which affect the quality and require lengthy curing times and struggle with precise attachment to the window glass.
Innovation Solution
A slider-equipped window glass with an integrally molded slider featuring a soft inner layer and a harder outer layer, where the outer layer includes an engaging portion for the up-and-down movement guide member, produced through a two-color molding process that eliminates the need for adhesives and ensures high precision and flush surface construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive or double-sided adhesive tape is used to attach slider to window glass, then attachment is achieved, but productivity decreases due to aging time requirement and manufacturing precision deteriorates due to difficulty in achieving high precision attachment
Solution Approach 1:
The patent extracts and eliminates the adhesive from the attachment system entirely. Instead of using adhesive or double-sided tape to attach the slider to the window glass, the invention uses a mechanical attachment mechanism where the slider has attachment protrusions that fit into corresponding recesses on the window glass, achieving attachment without any adhesive curing time requirement.
Solution Approach 2:
The patent replaces the chemical bonding system (adhesive) with a mechanical bonding system. The slider incorporates attachment protrusions made of a hard material that mechanically engage with recesses on the window glass surface, substituting the chemical adhesion process with a mechanical interlocking mechanism that provides both attachment and high precision positioning.
2Ease of manufacture
If adhesive or double-sided adhesive tape is used to attach slider to window glass, then attachment is achieved, but manufacturing precision deteriorates due to inability to achieve high precision attachment position
Solution Approach 1:
The patent replaces the chemical bonding system (adhesive) with a mechanical bonding system. The slider incorporates attachment protrusions made of a hard material that mechanically engage with recesses on the window glass surface, substituting the chemical adhesion process with a mechanical interlocking mechanism that provides both attachment and high precision positioning.
Solution Approach 2:
The patent changes the material parameter of the attachment protrusions to a hard material with high dimensional stability. This material property change enables the protrusions to maintain precise geometric shapes that can accurately engage with the recesses on the window glass, achieving attachment position precision in the order of a few hundred micrometers or better.
3Device complexity
If single-layer slider is used, then structure is simple, but durability deteriorates due to lack of protection against wear and damage
Solution Approach 1:
The patent applies composite material construction to the slider, creating a multi-layer structure where the main body is made of a soft, flexible material and the attachment protrusions are made of a hard, wear-resistant material. This composite structure combines the advantages of both materials: the soft body provides flexibility and sealing, while the hard protrusions provide durability and resistance to wear and damage during engagement with the window glass.
Solution Approach 2:
The patent applies local quality differentiation within the slider structure. Different regions of the slider have different material properties: the main body uses a soft material for flexibility and sealing functions, while the attachment protrusions use a hard material specifically where contact and wear occur with the window glass. This localized material optimization enhances overall durability without compromising the functions requiring softness.
Data Source
AI summary
To provide a slider-equipped window glass capable of increasing the productivity and quality, and a process for its production. A slider 24 is an integrally molded product comprising an inner layer portion 36 and an outer layer portion 38. The inner layer portion 36 is bonded to a vehicle inner surface 20F of a window glass 20, and the outer layer portion 38 is located on the vehicle inner surface side of the inner layer portion 36 and is made of a material harder than the inner layer portion 36. Further, in the outer layer portion 38, a concave engaging portion 26 to engage with an up-and-down movement guide member 22, is formed.