Variable Speed Cutting Elements for Web Substrate Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional anvil roll/cutting roll setups for separating discrete articles from continuous webs are inefficient, requiring frequent changes for different article sizes, leading to costly downtime and issues with roll parallelism and center-to-center distances affecting cut quality.
Innovation Solution
The apparatus features a first and second cutting element mounted around an axis of rotation, with cutting edges parallel and defining a variable circumferential distance, allowing for independent control of rotational speeds to maintain matched speeds with the anvil surface, reducing wear and ensuring precise cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional anvil roll/cutting roll setups are used, then discrete articles can be separated from continuous webs, but frequent roll changes are required for different article sizes leading to costly downtime
Solution Approach 1:
The cutting roll incorporates multiple cutting elements that can be independently positioned along the circumference, allowing dynamic adjustment of cutting pitch without changing the entire roll. The cutting elements can be moved to different positions to accommodate various article sizes, eliminating the need for frequent roll changes and reducing downtime.
Solution Approach 2:
The cutting roll is divided into multiple cutting elements rather than using a single continuous blade. Each cutting element can be independently positioned and adjusted, allowing the system to segment the cutting function across multiple elements. This enables flexible configuration for different article sizes while maintaining a single roll assembly.
2Manufacturing precision
If conventional anvil roll/cutting roll assemblies are used, then cutting can be performed, but roll parallelism and center-to-center distance issues cause problems with cuts or separation
Solution Approach 1:
The apparatus includes sensors and control systems that monitor the position and alignment of the cutting elements relative to the anvil roll. Real-time feedback is provided to the control system, which automatically adjusts the cutting element positions to maintain proper parallelism and center-to-center distance, ensuring consistent cut quality and reliable separation.
Solution Approach 2:
The patent replaces manual mechanical alignment procedures with automated control systems. Instead of relying on precise mechanical setup and manual adjustment of roll parallelism and center-to-center distance, the system uses automated sensors and actuators to maintain proper alignment, eliminating the reliability issues associated with manual mechanical systems.
3Productivity
If single cutting element rolls are used, then simple structure is maintained, but tool wear occurs and cutting efficiency decreases
Solution Approach 1:
The cutting roll incorporates multiple cutting elements, allowing individual elements to be replaced or sharpened independently when worn. Instead of replacing the entire roll or reducing productivity due to wear, the system can recover by swapping out only the worn cutting element, extending the overall tool life and maintaining cutting efficiency.
Solution Approach 2:
The cutting elements are designed to be dynamically replaceable and repositionable. When one cutting element wears out, the system can activate another element from the same roll, effectively extending the operational life of the cutting system without interrupting productivity. This dynamic redundancy ensures continuous efficient cutting.
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
The present invention relates to an apparatus and a process for cutting a substrate wherein the apparatus comprises first and second cutting element and wherein the first and second cutting elements are rotatable about the axis of rotation at different circumferential speeds.