Friction Polishing Device for Polymer Filament Bristles
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Solution Overview
Problem
Conventional methods for polishing plastic filament bristles, such as grinding with abrasive wheels, result in incomplete polishing with remaining shreds of ground plastic and a rough, scratched surface, particularly in toothbrush bristles.
Innovation Solution
A polishing device with a grinding surface coated with aramid fibers or pulp bonded with a polyimide resin, which provides a high dynamic coefficient of friction to radius the bristle tips and remove attached plastic shreds, using a conical grinding wheel with a friction material applied to a conventional grinding wheel surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional abrasive wheels are used for grinding bristle tips, then material is removed to round the edges, but the surface becomes scratched and rough with remaining plastic shreds
Solution Approach 1:
The patent introduces a friction material as an intermediary between the grinding wheel and the bristle tips. This friction material, having a high dynamic coefficient of friction, acts as a mediator that transfers mechanical energy more effectively to remove plastic shreds and smooth scratches without the direct contact damage caused by conventional abrasive wheels
Solution Approach 2:
The patent changes the physical parameters of the grinding wheel surface by applying a friction material coating with specific properties (high dynamic coefficient of friction). This parameter change transforms the interaction mechanism from direct abrasive grinding to friction-based polishing, eliminating surface scratches and improving the removal of plastic shreds
2Shape
If grinding wheel removes plastic material, then bristle tips are rounded, but plastic shreds remain attached to the filaments
Solution Approach 1:
The friction material serves as an intermediary that changes the mechanism of material removal. Instead of direct abrasive cutting that leaves shreds, the high-friction coating creates a polishing action that fully removes plastic material without leaving attached shreds on the bristle 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
The solution effectively removes shreds and smooths out scratches, providing a polished finish without residual plastic material, resulting in a more uniform and smooth surface for toothbrush bristles.
Implementation Method 1
a friction material thereon, the friction material having aramid fibers or pulp bonded with a polyimide resin
Data Source
AI summary
A polishing device for polishing bristles includes a grinding surface and a friction material thereon, the friction material having aramid fibers or pulp bonded with a polyimide resin.