Perforating Cylinder with Segmented Anvil Beads for High-Speed Web Shaping
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Solution Overview
Problem
Current manufacturing processes are unable to produce rolled products with shaped lines of weakness at high speeds due to the complexity of maintaining tight tolerances and minimizing vibrations, which is essential for commercial viability.
Innovation Solution
A method and apparatus involving a rotating cylinder with recessed portions and anvil blocks that include anvil beads, where a blade with teeth cooperates with the anvil beads to create a shaped line of weakness in the web, while controlling debris through air flow and cavities to maintain web integrity and prevent interference with the perforation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional die cutting or laser cutting methods are used to create shaped lines of weakness, then manufacturing precision and product quality are improved, but manufacturing speed decreases and production cost increases
Solution Approach 1:
The anvil is segmented into multiple adjustable anvil blocks that can be independently positioned to form different shaped lines of weakness. This segmentation allows the system to achieve complex shapes at high speeds by breaking down the perforation task into multiple manageable zones along the web width
Solution Approach 2:
The anvil blocks are made dynamically adjustable during operation, allowing the shaped line of weakness configuration to be changed without stopping production. This dynamic adjustment capability enables high-speed manufacturing while maintaining manufacturing precision through programmable positioning
2Manufacturing precision
If tight tolerances are maintained in the perforating equipment, then manufacturing precision is improved, but device complexity and vibration sensitivity increase
Solution Approach 1:
The anvil blocks are pre-positioned and pre-adjusted to the desired configuration before the perforating operation begins. This preliminary setup ensures that tight tolerances are achieved without requiring complex real-time control systems during high-speed operation
Solution Approach 2:
The adjustable anvil blocks serve as intermediaries between the fixed perforating blade and the web material. These blocks absorb and compensate for vibrations and tolerance variations, protecting the overall system from complexity while maintaining precision
3Productivity
If high-speed perforating is implemented, then productivity is improved, but vibration and manufacturing precision deteriorate
Solution Approach 1:
The system is designed to be dynamically stable at high speeds, with the anvil blocks and blade positioned to minimize vibration generation and transmission. The adjustable nature of the anvil blocks allows optimization of the perforating geometry for high-speed operation while maintaining precision
4Adaptability or versatility
If shaped lines of weakness are created instead of straight perforations, then product distinguishability and consumer appeal are improved, but manufacturing complexity increases
Solution Approach 1:
The shaped line of weakness is created by segmenting the anvil into multiple adjustable blocks that can be positioned in different patterns. This segmentation allows complex shapes to be formed using simple, modular components rather than requiring a completely complex perforating system
Solution Approach 2:
The adjustable anvil block system serves multiple functions: it can create straight lines, curved lines, and various geometric patterns all with the same basic mechanism. This multi-functionality provides product differentiation without requiring separate specialized equipment for each shape
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, ensuring sustained manufacturing run times and maintaining web quality by effectively managing debris and minimizing its adverse impact on the perforation process.
Implementation Method 1
a blade with teeth cooperates with the anvil beads to create a shaped line of weakness in the web
Implementation Method 2
controlling debris through air flow and cavities to maintain web integrity and prevent interference with the perforation process
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.