Compact Through-Air Roll With Circuitous Air Path
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Solution Overview
Problem
Conventional through-air apparatuses face challenges in achieving high performance and production throughput while maintaining a compact size, due to their large machine air systems and high capital costs.
Innovation Solution
A compact high-performance through-air apparatus with a high flow circuitous air path, including a through-air roll and a recirculating air path through supply and exhaust conduits, guided by turning vanes and static mixers to achieve efficient air flow and temperature uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional through-air apparatuses use large machine air systems to achieve high performance and production throughput, then productivity and performance are improved, but device volume and capital costs increase
Solution Approach 1:
The patent applies nesting by placing the air handling components inside the through-air roll itself. The supply conduit, exhaust conduit, and turning vanes are nested within the roll structure, creating a compact integrated system that achieves high productivity without requiring large external machine air systems
Solution Approach 2:
The patent moves the air system from a conventional external three-dimensional arrangement to a compact internal configuration within the roll. By reorganizing the air paths in a circuitous manner through the roll interior, the system achieves high performance in a reduced volume
2Volume of stationary object
If conventional through-air apparatuses are designed for compact size, then device volume is reduced, but air flow characteristics and performance deteriorate
Solution Approach 1:
The patent uses turning vanes that are positioned to dynamically guide air flow through the circuitous path. The vanes are configured to optimize air distribution throughout the compact volume, ensuring high-velocity air flow and effective through-air bonding performance despite the reduced apparatus size
Solution Approach 2:
The patent creates localized high-velocity air flow regions within the compact roll structure. The turning vanes and conduit arrangement are designed to concentrate and direct air flow precisely where needed, achieving uniform air distribution and high performance in a small volume
3Productivity
If conventional through-air apparatuses use complex air systems to achieve high performance, then productivity is improved, but device complexity and capital costs increase
Solution Approach 1:
The patent merges the supply and exhaust air systems into a single integrated through-air roll structure. The supply conduit, exhaust conduit, and turning vanes work together as a unified system, eliminating the need for separate complex air handling components and reducing overall device complexity while maintaining high productivity
Solution Approach 2:
The through-air roll serves multiple functions: it acts as both the web-carrying structure and the air distribution system. The integrated design performs air supply, air distribution, and air exhaust functions within a single component, reducing the number of separate systems needed
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
The compact design achieves high performance air flow characteristics in a smaller space, reducing capital costs and lead times, while maintaining the ability to meet stringent product quality requirements.
Implementation Method 1
a plurality of turning vanes positioned within the high flow circuitous path positioned to guide the flow of air through the apparatus
Implementation Method 2
The through-air roll typically has a plurality of openings to permit the air to pass through the roll
Data Source
Figure 1
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AI summary
A high performance through-air apparatus is provided. The though-air apparatus includes a through-air roll configured for rotational movement about a first axis, and a high flow circuitous air path inside of the apparatus that includes a path extending through a supply conduit, through the through-air roll, and also through an exhaust conduit. The through-air apparatus also includes a plurality of turning vanes positioned within the high flow circuitous path positioned to guide the flow of air through the apparatus. The through-air apparatus has a length, a width, a height, which together define a volume having a compact configuration. The high flow circuitous air path inside of the apparatus has a length, where the ratio of the volume of the through-air apparatus to the length of the high flow circuitous air path is less than 20 m2.