Razor Blade Strip Thickness Reduction and Beveling
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Solution Overview
Problem
Existing methods for manufacturing razor blades face challenges in efficiently reducing the thickness of strip material to achieve the desired small dimension from the cutting edge to the back edge, particularly in ensuring easy removal of the rear section without arching or difficulty in processing.
Innovation Solution
The method involves reducing the maximum thickness of the strip material by at least 10% through passing it between rollers while under tension, and simultaneously pressing and offsetting the material to create beveled surfaces and weakened regions, which allows for the conversion of the strip material into razor blades with enhanced beveled edges and improved attachment to supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the strip material thickness is reduced to achieve small dimension from cutting edge to back edge, then the blade length dimension is improved, but the material tension increases causing arching and processing difficulty
Solution Approach 1:
The patent applies preliminary action by reducing the strip material thickness before the rear section removal step. By thinning the material in advance while it is still under tension on the processing line, the blade achieves the required small dimension from cutting edge to back edge, and the pre-thinned material is easier to remove subsequently without causing arching or processing difficulties.
2Productivity
If the strip material thickness is reduced while under tension on processing line, then the processing efficiency is improved, but the material arching occurs
Solution Approach 1:
The patent applies local quality by selectively thinning only the blade portion of the strip material while leaving the support portion relatively thicker. This is achieved by positioning the blade over a support during the thinning process, so that the support provides a counterforce that prevents arching and maintains material flatness, while the blade area receives the thickness reduction treatment.
3Shape
If the rear section is removed by bending between 60° and 90°, then the blade structure is improved, but the removal process becomes difficult
Solution Approach 1:
The patent applies preliminary action by reducing the strip material thickness before rear section removal. This pre-thinning makes the material more pliable and easier to bend and remove, reducing the difficulty of the rear section removal process while still achieving the desired blade structure with proper bending angles.
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 effectively reduces material tension, prevents arching, and facilitates easier processing, resulting in more efficient production of razor blades with increased length and improved attachment to supports, allowing for more blades to be produced from a given strip length.
Implementation Method 1
The thickness of the strip material can be reduced, for example, by passing the strip material between rollers
Implementation Method 2
pressing a portion of the lengthwise-extending blade edge region to provide the portion with a thickness that is less than the thickness of the strip material adjoining the lengthwise-extending blade edge region. Pressing can provide the lengthwise-extending blade edge portion with upper and lower beveled surfaces
Data Source
AI summary
A method of manufacturing razor blades from a strip material including reducing the thickness of the strip material by at least 10% and converting the strip material into razor blades.