Tape Splitter Profile for High-Tensile Rope Production
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Solution Overview
Problem
Existing methods for producing high-tensile ropes from uniaxially oriented thermoplastic tapes result in non-uniform ropes and reduced tensile strength due to the cutting of fibrils during the process of splitting wide tapes into narrower ones.
Innovation Solution
A process that splits the tape into desired strips interconnected by fibrils without cutting them, using a splitter profile with triangular teeth, allowing for direct rope formation and increased tensile strength, and a device comprising a splitter profile and counterprofile forming a zig-zag nip for efficient tape splitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wide tapes are cut into narrow tapes using conventional cutting methods, then the tapes can be supplied as separate narrow tapes, but the fibrils are cut and the joint tensile strength is reduced
Solution Approach 1:
The wide tape is segmented into multiple narrow tapes using a splitter profile with multiple cutting teeth arranged in a specific pattern. The segmentation is designed to maintain fibril connectivity between adjacent narrow tapes, allowing them to remain partially interconnected rather than completely separated, thus preserving tensile strength while achieving the desired narrow tape dimensions
Solution Approach 2:
The splitter profile acts as an intermediary tool that performs the cutting function while preserving fibril integrity. By using a specialized splitter profile with controlled tooth geometry and spacing, the cutting process separates the wide tape into narrow tapes without completely severing the fibrils, maintaining the mechanical connection between adjacent tapes
2Manufacturing precision
If narrow tapes are cut from wider tapes, then the desired narrow tape width is achieved, but the fibrils are damaged and overall joint tensile strength is reduced
Solution Approach 1:
The cutting action is localized to specific regions between the cutting teeth, while other regions maintain fibril connectivity. The splitter profile creates zones of separation and zones of maintained connection, allowing precise width control while preserving structural integrity through the interconnected fibril network between adjacent narrow tapes
3Productivity
If wide tapes are split into narrow tapes using conventional methods, then the tapes can be processed separately, but additional steps like rewinding are required and the process becomes more complex
Solution Approach 1:
The splitting operation is merged with the rope formation process. By maintaining fibril connectivity between adjacent narrow tapes during splitting, the tapes can be directly fed into the rope twisting machine without intermediate handling, rewinding, or rejoining steps, thus simplifying the overall process and improving productivity
Data Source
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AI summary
A process and a splitter for splitting a tape of a uniaxially oriented material. The tape is passed in a process direction over a splitting profile having a row of parallel teeth with a cutting edge extending in the process direction. The tape is split to form a tape comprising a plurality of parallel strips interconnected by fibrils. The split tape can for example be used for the production of high tensile ropes.