Composite Bicycle Component Molding for Defect-Free Surfaces
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Solution Overview
Problem
Existing methods for producing bicycle components from fiber composite materials often require extensive post-processing to eliminate surface defects like depressions and craters, which are visually noticeable and require additional coatings to achieve high optical quality, increasing costs and complexity.
Innovation Solution
The method involves forming bicycle components partially or completely from fiber composite materials in a mold with a specifically roughened molding area to create a targeted surface roughness of at least 1 micrometer to 4 micrometers, which prevents surface defects and enhances optical quality, allowing for direct coating without additional treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth mold surface is used to produce fiber composite bicycle components, then the molding process is simpler, but surface defects like depressions and craters occur that require extensive post-processing
Solution Approach 1:
The mold surface is differentiated into two zones: a smooth non-sticking area for easy demolding and a roughened molding area that prevents surface defects. This local quality variation allows the mold to simultaneously provide easy manufacture in one region and high surface quality in another region.
Solution Approach 2:
The mold surface is pre-roughened in the molding area before the molding process to a mean roughness of 1-4 micrometers. This preliminary action creates surface irregularities that prevent the formation of depressions and craters during fiber composite molding, eliminating the need for subsequent post-processing to achieve high optical quality.
2Manufacturing precision
If extensive post-processing is performed to eliminate surface defects, then optical quality is improved, but production costs and time increase
Solution Approach 1:
The mold surface is pre-roughened in the molding area before the molding process to a mean roughness of 1-4 micrometers. This preliminary action creates surface irregularities that prevent the formation of depressions and craters during fiber composite molding, eliminating the need for subsequent post-processing to achieve high optical quality.
Solution Approach 2:
The invention extracts the post-processing step from the manufacturing workflow by preventing surface defects at the source through mold surface roughening. This eliminates the need for separate operations like sanding, filling, and varnishing, thereby improving productivity.
3Manufacturing precision
If the mold surface is roughened to prevent surface defects, then surface quality improves, but the mold manufacturing complexity increases
Solution Approach 1:
The mold surface is differentiated into two zones: a smooth non-sticking area for easy demolding and a roughened molding area that prevents surface defects. This local quality variation allows the mold to simultaneously provide easy manufacture in one region and high surface quality in another region.
Solution Approach 2:
The mold surface roughness parameter is specifically controlled in the molding area to a mean roughness of 1-4 micrometers. This parameter change creates the necessary surface characteristics to prevent defects without requiring complex mold structures or additional components.
4Manufacturing precision
If varnish and additional coatings are applied to achieve uniform finish, then optical quality improves, but production steps and costs increase
Solution Approach 1:
The invention extracts the post-processing step from the manufacturing workflow by preventing surface defects at the source through mold surface roughening. This eliminates the need for separate operations like sanding, filling, and varnishing, thereby improving productivity.
Solution Approach 2:
The mold surface is pre-roughened in the molding area before the molding process to a mean roughness of 1-4 micrometers. This preliminary action creates surface irregularities that prevent the formation of depressions and craters during fiber composite molding, eliminating the need for subsequent post-processing to achieve high optical quality.
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 approach results in defect-free, high-quality surfaces that require minimal post-processing, reducing production costs and achieving superior visual and coating adhesion, thus optimizing the manufacturing process for fiber composite bicycle components.
Implementation Method 1
at least one molding area of the molding tool used to shape at least one outer section of the component body is specifically provided with at least one surface roughness
Implementation Method 2
the component body is formed at least partially, in particular completely, from at least one fiber composite material in at least one molding tool
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Method for manufacturing a bicycle component (10) comprising a component body (20) which is at least partially formed from a fiber-reinforced composite material in a mold (3). In this process, a mold area (13) of the mold (3), used for forming an outer section (4) of the component body (20), is specifically provided with at least one surface roughness (5). The surface roughness (5) of the mold area (13) simultaneously creates a targeted surface roughness (5) for the outer section (4) during its formation, in order to counteract surface defects of the formed outer section (4).