Mixer Blade with Segmented Serrations to Prevent Edge Breakage
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Solution Overview
Problem
Existing mixer blades suffer from a trade-off between operational reliability and cutting capacity, as sharply ground edges tend to break when encountering hard materials, leading to reduced cutting performance.
Innovation Solution
A blade design featuring a combination of sharply ground corrugations and blunt, rounded flat sections, where the flat sections provide edge stability and prevent breakage while maintaining high cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting edge is sharply ground, then the cutting capacity is improved, but the operational reliability deteriorates due to increased breakage risk
Solution Approach 1:
The cutting edge is designed with spatially varying properties: corrugated sections with sharp cutting edges for high cutting capacity, and flat sections with rounded edges for high reliability. This local differentiation allows different portions of the cutting edge to serve different functions - the corrugated portions handle cutting while the flat portions provide structural strength and prevent breakage.
Solution Approach 2:
The cutting edge is segmented into multiple distinct sections along its length - alternating corrugated sections and flat sections. Each segment has different geometric characteristics and functional properties, allowing the blade to simultaneously achieve both high cutting performance and high operational reliability through the collective action of these segmented portions.
2Reliability
If the cutting edge is made robust to prevent breakage, then the operational reliability is improved, but the cutting capacity deteriorates due to reduced sharpness
Solution Approach 1:
Rather than making the entire cutting edge uniformly robust, the invention applies robustness locally only where needed - the flat sections have rounded edges and greater thickness for strength and reliability, while the corrugated sections maintain sharp edges for cutting capacity. This localized application of robustness avoids the trade-off by concentrating strength where it prevents breakage without sacrificing cutting performance.
Solution Approach 2:
The cutting edge is divided into functional segments where flat sections provide robustness and corrugated sections provide cutting sharpness. This segmentation allows the blade to achieve both reliability and cutting capacity simultaneously, as each segment contributes its specialized function to the overall performance.
Data Source
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AI summary
The invention relates to a blade means (1) for a mixer, e.g. an immersion blender (2) or stand mixer, which at least comprises: a rotational shaft (3); at least one blade (4) which extends from the rotational shaft (3) and has at least one cutting edge (5); and a plurality of serrations (6) which are formed in the at least one cutting edge (5), wherein the individual serrations (6) are spaced apart from one another by a planar portion (7) of the at least one cutting edge (5), wherein the planar portion (7) of the at least one cutting edge (5) is less sharp than the serrations (6).