Bristle Tip Sharpening via Mechanical Grinding and Dynamic Rotation
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Solution Overview
Problem
Existing methods for sharpening bristles in brushes, such as chemical processes, are environmentally harmful and do not achieve high enough quality for cleaning, while mechanical methods are limited in effectiveness.
Innovation Solution
A method and device for mechanically sharpening bristles using a tuft holder with a grinding roller, where the bristles are held at a specific ratio of free length to conical tip length, and the tuft holder rotates at an angle to the grinding roller, allowing for precise sharpening of both ends without chemical solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical processes are used to sharpen bristles, then the quality of bristle tips is improved, but environmental harm and equipment corrosion increase
Solution Approach 1:
The patent replaces the chemical sharpening process with a mechanical grinding process. A grinding device with a grinding wheel mechanically abrades the bristle ends to create pointed tips, eliminating the need for corrosive chemical solutions while achieving the desired bristle tip quality.
Solution Approach 2:
The patent changes the fundamental parameter of the sharpening process from chemical dissolution to mechanical abrasion. By controlling grinding parameters such as wheel speed, feed rate, and bristle positioning, the process achieves precise tip shaping without environmental harm.
2Stability of the object's composition
If mechanical grinding is used with short free length, then positional stability is improved, but sharpening quality is insufficient
Solution Approach 1:
The patent introduces dynamic elements to the grinding process, including rotation of the bristle tuft during grinding and controlled movement of the grinding wheel. This dynamic approach allows the bristles to be sharpened uniformly while maintaining adequate support, achieving both stability and high sharpening quality.
Solution Approach 2:
The patent adds rotational motion as an additional dimension to the grinding process. By rotating the bristle tuft while grinding, the process achieves uniform sharpening around the circumference of the tuft, improving overall sharpening quality without compromising positional stability.
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 method achieves high-quality bristle tips with improved cleaning properties, extending tool life and reducing environmental impact by avoiding harmful chemicals.
Implementation Method 1
grinding the bristle ends at the first free end
Implementation Method 2
grinding the bristle ends at the first free end
Data Source
Figure 1I~1V
Figure 2
Figure 3
AI summary
The invention relates to a method for mechanically sharpening bristles for brushes, in particular toothbrushes, by grinding, comprising the following steps: a) holding bristle clusters (12) in a cluster holder (18) such that the ratio (L/l) of the exposed length (L) of the bristle cluster, measured from the holder to exposed end to be sharpened, to the length (l) of the conical point of the bristles that is to be created is greater than or equal to 3, and b) grinding the bristle ends (24) on the first exposed end. The invention further relates to a grinding device for mechanically sharpening bristles for brushes, wherein the cluster holder is designed to have a holding unit which enables a holding, in particular a clamping, of at least one bristle cluster at different locations of the bristle cluster over the length thereof, and a displacing of the bristle cluster into a non-holding, in particular non-clamping, position of the cluster holder, relative to the cluster holder.