Zoned Vacuum Commutation for Diaper Manufacturing
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Solution Overview
Problem
High-speed diaper manufacturing processes face challenges with traditional vacuum systems, leading to misalignment, folding, and loss of control due to air influx, increased vacuum demand, and high operational costs, particularly when handling discrete and irregularly shaped components.
Innovation Solution
A zoned vacuum commutation system with multiple, radially spaced vacuum ports and zones on a rotating puck structure, allowing for precise control of vacuum application and minimizing air influx, using a rotating valve disk for instantaneous on/off control and reducing the need for traditional vacuum generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional vacuum systems are used at high speeds, then vacuum demand increases, but air influx causes misalignment, folding, and loss of control
Solution Approach 1:
The vacuum system is divided into multiple independently controllable vacuum zones around the rotating puck. Each zone can be activated or deactivated separately through a rotating valve disk, allowing precise control of vacuum application timing and location. This segmentation enables the system to maintain control at high speeds by applying vacuum only where and when needed, rather than using a single continuous vacuum source.
Solution Approach 2:
The system uses periodic activation of vacuum zones through the rotating valve disk, which sequentially opens and closes vacuum ports as the puck rotates. This periodic action allows the vacuum to be applied in discrete time intervals corresponding to specific zones, enabling precise control over when vacuum is applied to different areas of the carried object, thereby preventing misalignment and folding at high operational speeds.
2Productivity
If traditional vacuum systems are used, then vacuum demand increases, but operational costs and noise increase
Solution Approach 1:
The vacuum system is divided into multiple independently controllable vacuum zones around the rotating puck. Each zone can be activated or deactivated separately through a rotating valve disk, allowing precise control of vacuum application timing and location. This segmentation enables the system to maintain control at high speeds by applying vacuum only where and when needed, rather than using a single continuous vacuum source.
Solution Approach 2:
The system uses periodic activation of vacuum zones through the rotating valve disk, which sequentially opens and closes vacuum ports as the puck rotates. This periodic action allows the vacuum to be applied in discrete time intervals corresponding to specific zones, enabling precise control over when vacuum is applied to different areas of the carried object, thereby preventing misalignment and folding at high operational speeds.
3Reliability
If vacuum is applied continuously, then control is maintained, but air turbulence increases causing folding and misalignment
Solution Approach 1:
The vacuum system is divided into multiple independently controllable vacuum zones around the rotating puck. Each zone can be activated or deactivated separately through a rotating valve disk, allowing precise control of vacuum application timing and location. This segmentation enables the system to maintain control at high speeds by applying vacuum only where and when needed, rather than using a single continuous vacuum source.
Solution Approach 2:
The system uses periodic activation of vacuum zones through the rotating valve disk, which sequentially opens and closes vacuum ports as the puck rotates. This periodic action allows the vacuum to be applied in discrete time intervals corresponding to specific zones, enabling precise control over when vacuum is applied to different areas of the carried object, thereby preventing misalignment and folding at high operational speeds.
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 system provides improved control and precision in vacuum application, reducing misalignment and operational costs by minimizing air turbulence and enabling faster processing speeds with reduced reliance on traditional vacuum systems.
Implementation Method 1
Vacuum is used in many parts of a diaper manufacturing process. For instance, during pulp core formation, vacuum draws pulp fibers into forming pockets on a core forming drum.
Implementation Method 2
A zoned vacuum commutation system with multiple, radially spaced vacuum ports and zones on a rotating puck structure, allowing for precise control of vacuum application and minimizing air influx, using a rotating valve disk for instantaneous on/off control
Data Source
AI summary
The present invention provides a method and apparatus for a transporting a discrete element, by activating a discrete vacuum zone on a puck at or before an acquisition, rotating the puck about an axis (and optionally twisting the puck), and deactivating the discrete vacuum zone at a deposition point, through tightly controlled piecewise vacuum porting particularly in applications where vacuum commutation length changes in radial direction.