Modular Cutting Knife With Detachable Knife Holders
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Solution Overview
Problem
Existing cutting blades for steel cord scissors, with permanently soldered hard metal cutting inserts, are prone to damage when cutting elastic materials like rubber-reinforced steel cords, leading to material eruptions or cracks that render the blade unusable once severely damaged.
Innovation Solution
A modular cutting blade design featuring detachable knife holders with cutting inserts that can be easily replaced, where each knife holder is securely fastened to a central carrier using screws and clamping plates, ensuring a continuous cutting edge and allowing for refurbishment by replacing damaged inserts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a permanently soldered cutting insert is used on the carrier, then the cutting edge is continuous and stable, but the blade becomes unusable when the cutting insert is severely damaged
Solution Approach 1:
The cutting insert is divided into multiple segments (first cutting insert and second cutting insert) that can be independently replaced. Each segment is mounted on a separate carrier portion, allowing individual replacement without replacing the entire cutting insert or blade assembly.
Solution Approach 2:
The cutting inserts are extracted from the permanent attachment structure and made detachable from the carrier. This allows the cutting inserts to be removed and replaced independently when damaged, while the carrier and blade structure remain in use.
2Device complexity
If the cutting insert is inextricably connected to the carrier, then the structure is simple and robust, but the entire blade must be discarded when the cutting insert is damaged
Solution Approach 1:
The blade assembly is segmented into reusable components (carrier, blade structure) and replaceable components (cutting inserts). This segmentation allows the valuable carrier and blade structure to be preserved while only the damaged cutting inserts are replaced.
Solution Approach 2:
Instead of discarding the entire blade when the cutting insert is damaged, the design allows for discarding only the worn cutting insert while recovering and reusing the carrier and blade structure. This significantly reduces material waste.
3Ease of repair
If a modular design with detachable knife holders is used, then the blade can be refurbished by replacing damaged inserts, but the structure becomes more complex
Solution Approach 1:
The blade is segmented into modular components (carrier with multiple mounting positions, individual cutting inserts) that can be independently assembled and replaced. This modular structure enables easy refurbishment while maintaining reasonable structural complexity.
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
Enables the cutting blade to remain functional and reusable even after severe damage, as damaged cutting inserts can be swiftly replaced, maintaining a continuous cutting edge and extending the blade's lifespan.
Implementation Method 1
at least one clamping plate (16), which in the assembled position braces the knife holders (4) against one another, to be detachably fastened to the carrier (2) on each side
Implementation Method 2
the cutting inserts (5) lie next to one another and form a continuous cutting edge (7)
Data Source
AI summary
The knife (1) has beam-shaped carriers (2) at which knife holders (4) are detachably fastened. The knife holders comprise cutting inserts (5) added to a continuous cutter. Length of the knife holders corresponds to length of the cutting inserts. A recess is provided at the knife holders. The cutting inserts are held in the recess in a form-fit manner and mounted in a load direction. The cutting inserts are soldered in the recess. Another recess is provided at the carrier. The knife holders are held in the knife holders in a form-fit manner.