Vehicle Radar Cover Layer Integration via Mechanical Engagement
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Solution Overview
Problem
Existing radio wave transmission covers for vehicles face issues with substrate layers separating from cover layers due to differences in melting points and contraction ratios, leading to reduced radio wave transmissibility and limited design freedom, as seen in prior art techniques.
Innovation Solution
A radio wave transmission cover design featuring a cover layer made of transparent resin with a second layer incorporating a colorant, and a substrate layer with complementary engaging parts, ensuring firm integration and preventing separation, while allowing for multiple colors and complex designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the melting point of the first resin material is higher than that of the second resin material, then the first resin layer is prevented from being melted by the heat of the molten second resin layer, but the compatibility between the two resin layers is reduced, making it difficult to firmly integrate them
Solution Approach 1:
The invention divides the cover layer into multiple segments (first cover layer and second cover layer) with different material compositions. The first cover layer uses transparent resin while the second cover layer uses opaque resin, allowing each segment to serve specific functions while being integrated through mechanical engagement structures
Solution Approach 2:
Different regions of the cover layer are assigned different material properties: the first cover layer (transparent region) maintains high transparency for design visibility, while the second cover layer (opaque region) provides opacity for masking. This local differentiation resolves the contradiction by allowing material optimization in each region rather than using a single material throughout
2Strength
If techniques for mechanically engaging the two resin layers are used, then the integration strength is improved, but the design freedom is limited due to the need for engaging parts
Solution Approach 1:
The invention merges the mechanical engagement function with the design pattern itself. The engaging projection parts and depression parts are formed as integral components of the molded cover layer, combining structural reinforcement with aesthetic design in a single manufacturing process, thus maintaining design freedom while ensuring integration strength
Solution Approach 2:
The cover layer structure serves multiple functions simultaneously: it provides mechanical engagement for integration, maintains design patterns through transparent and opaque regions, and enables various color schemes. The engaging structures are designed to be compatible with different design configurations, making the solution universally applicable
3Temperature
If the cover layer and substrate layer are made of materials with different melting points, then the design layer is prevented from being deformed, but the relative positions may be displaced due to difference in contraction ratios
Solution Approach 1:
The invention incorporates engagement structures (projections and depressions) that are pre-formed during the molding process. These structures are designed to automatically align and lock the cover layer and substrate layer in correct positions before final cooling and contraction occur, preventing position displacement due to differential contraction
Solution Approach 2:
The engagement structures act as intermediary elements between the cover layer and substrate layer. These structures maintain precise relative positioning during the cooling and contraction phase by providing mechanical constraints that compensate for differential material contraction, ensuring manufacturing precision
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 effectively prevents separation of the cover and substrate layers, maintains radio wave transmissibility, and offers high design flexibility by using identical transparent resin for both cover layers and incorporating a colorant for design enhancement.
Implementation Method 1
The design layer is a relatively thin layer, which is formed through vapor deposition of metal or transferring of a film
Implementation Method 2
the second cover layer comprises a plurality of engaging projection parts each of which has a plurality of cover-side wall surfaces extending in directions crossing the rear surface of the second cover layer; the substrate layer comprises a plurality of engaging depression parts, each of which has a plurality of substrate-side wall surfaces having shapes complementary to the corresponding cover-side wall surfaces; and the engaging projection parts are engaged to the corresponding engaging depression parts
Implementation Method 3
a second reinforcing resin layer is formed on the upper surface of the design layer, thus completing the manufacture of the radio wave transmission cover
Data Source
AI summary
The present invention provides a radio wave transmission cover, which is provided in front of a radar device for vehicles, and a method of manufacturing the radio wave transmission cover. In the radio wave transmission cover, cover-side wall surfaces (50) are formed in a second cover layer (35) at positions adjacent to each other. Furthermore, substrate-side wall surfaces (60), which have shapes complementary to the cover-side wall surfaces (50), are formed in a substrate layer (4), which is provided on the rear surface of the second cover layer (35). The cover-side wall surfaces (50) and the corresponding substrate-side wall surfaces (60) are engaged to each other.