Perforating Apparatus with Shaped Anvil Beads for High-Speed Web Cutting
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Solution Overview
Problem
Current manufacturing processes are unable to produce rolled products with shaped lines of weakness at high speeds, leading to inconsistencies and increased complexity, while existing perforation methods are inefficient and prone to vibration issues.
Innovation Solution
A perforating apparatus featuring a rotating cylinder with offset anvil blocks and anvil beads that form a shaped line of weakness, allowing for high-speed production with controlled debris management and minimized vibration, using a combination of recessed portions and air flow to maintain web integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional die cutting or laser cutting methods are used to create perforations, then manufacturing precision can be maintained, but production speed decreases and equipment complexity increases
Solution Approach 1:
The patent replaces traditional mechanical die cutting systems with a flex blade cutting system where a flexible blade contacts a stationary anvil roll. This substitution enables high-speed operation while maintaining perforation quality, resolving the contradiction between manufacturing precision and productivity
Solution Approach 2:
The patent introduces a dynamic flex blade that can deflect and adapt during high-speed operation, allowing the cutting system to maintain precision despite speed-related vibrations and variations, thus achieving both high productivity and manufacturing precision
2Productivity
If high-speed perforation is implemented, then productivity increases, but manufacturing precision deteriorates due to vibrations and equipment wear
Solution Approach 1:
The patent replaces high-speed mechanical die cutting with a flex blade system operating at lower speeds against a stationary anvil, reducing vibration-induced precision loss while maintaining high productivity through continuous operation
Solution Approach 2:
The flexible blade acts as an intermediary element that absorbs and dampens vibrations between the driving mechanism and the cutting action, maintaining perforation consistency during high-speed operation
3Ease of manufacture
If shaped anvil blocks are used to create unique perforation patterns, then product distinguishability improves, but device complexity increases
Solution Approach 1:
The patent divides the anvil roll into multiple discrete anvil blocks that can be independently configured with different shapes and patterns. This segmentation allows creation of distinguishable perforation patterns while keeping each individual anvil block relatively simple in design
Solution Approach 2:
The patent applies different local qualities to different sections of the anvil roll by varying the shape and configuration of individual anvil blocks, enabling product distinguishability through unique perforation patterns without requiring the entire anvil system to be complex
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 production of rolled products with unique, shaped lines of weakness at high manufacturing speeds, reducing debris impact and maintaining web quality, thus enhancing product distinguishability and consumer interaction.
Implementation Method 1
flex blade cutting is a cut created by shearing the web
Implementation Method 2
using a combination of recessed portions and air flow to maintain web integrity
Data Source
AI summary
A perforating apparatus and method includes a longitudinal cylinder axis about which a cylinder rotates. At least one shaped anvil bead is disposed on the cylinder. The cylinder including an anvil block and an anvil bead form a cavity. The cavity may be used to control the debris produced during the perforating process. A blade is disposed on a support to cooperate in contacting relationship with the anvil bead. A web is perforated as the web passes between the rotating cylinder and the support and the blade operatively engages with the anvil bead. The debris may be controlled by being drawn into the cavity prior to the point where the blade engages the anvil and, subsequently, being expelled after the point where the blade engages the anvil bead.