Brush Tuft Manufacturing via Pre-tuft Segmentation
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Solution Overview
Problem
Existing methods for manufacturing complex tufts in brushes often result in filament mixing, diminishing product quality and aesthetics, as filaments from one tuft element can slide into the wrong holder during the manufacturing process.
Innovation Solution
A method involving the formation of pre-tufts with fixedly connected filament ends, followed by the precise connection of these pre-tufts with additional tuft elements to create a final tuft, which is then attached to a brush body using overmolding, ensuring distinct tuft elements remain separate and securely attached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If individual pre-tufts are moved together into a single holder via feeding channels, then complex tuft structures can be manufactured, but filaments from different tuft elements may mix and slide into wrong holders, diminishing product quality and aesthetics
Solution Approach 1:
The tuft elements are divided into separate groups, with each group having its own dedicated feeding channel leading to a specific holder position. This segmentation prevents filaments from different tuft elements from mixing during the manufacturing process, while still allowing complex multi-element tuft structures to be created.
Solution Approach 2:
Separate feeding channels act as intermediaries between the filament supply and the holders, guiding each tuft element's filaments along distinct paths to their designated positions. This intermediary structure ensures precise filament routing and prevents mixing of different tuft elements.
2Strength
If heat is applied to fuse filament ends, then tuft elements can be securely connected, but filament types may mix during the feeding process before fusion
Solution Approach 1:
The feeding channels are designed to guide and separate filaments before they reach the holders and before the heat fusion process occurs. This preliminary separation action ensures that filaments of different types remain distinct throughout the manufacturing process, preventing mixing that would compromise tuft quality.
Solution Approach 2:
The manufacturing system is segmented into distinct feeding paths for different tuft elements, with each path leading to a specific holder position. This segmentation maintains filament type separation throughout the process, allowing heat fusion to occur only on correctly positioned, non-mixed filaments.
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 enhances the quality and aesthetics of the brush by maintaining the separation of tuft elements, preventing filament mixing and ensuring a secure attachment to the brush body, thereby improving brushing performance and appearance.
Implementation Method 1
heat is applied to the first ends of the first filaments so that the first ends at least partially melt and a connected first end is formed
Implementation Method 2
heat is applied to the connected first end of the first pre-tuft and the first end of the at least second tuft element so that they at least partially melt and a connected end is formed
Data Source
AI summary
A method of making a brush includes providing a plurality of first filaments, each having a first end and a second end; bringing the plurality of first filaments into a first predetermined shape such that the first ends are arranged side by side on a common contour; fixedly connecting the first ends so that a first pre-tuft having the first predetermined shape and a connected first end is formed; bringing a second tuft element having a first end and a second end together with the first pre-tuft into a second predetermined shape such that the first end of the second tuft element and the connected first end of the first pre-tuft are arranged side by side on a common contour; fixedly connecting the connected first end of the first pre-tuft and the first end of the at least second tuft element so that a final tuft having the second predetermined shape and a connected end is formed; and attaching the final tuft to a brush body by overmolding the final tuft's connected end with a plastic material.