Fiber Gathering Enclosure with Baffles for Turbulence Reduction
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Solution Overview
Problem
Existing equipment for gathering fibers in melt-blowing processes struggles to maintain consistent fiber density, leading to variations in the quality of the final product.
Innovation Solution
The proposed apparatus includes a modular construction with a melt-blowing module, a fiber gathering module, and a rod forming module. The fiber gathering module uses a conveyor system and an enclosure with baffles to separate surplus gas from the fibers, reducing turbulence and stabilizing the fiber web.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing equipment for gathering fibers is used, then the equipment can operate at higher production rates, but variations in fiber density increase leading to inconsistent product quality
Solution Approach 1:
The gathering module is divided into multiple zones (entrance zone, gathering zone, exit zone) with distinct functions. Each zone has specific baffle configurations and conveyor settings that work together to progressively stabilize the fiber web while maintaining high production rates. This segmented approach allows optimization of each zone for its specific function rather than trying to achieve all goals in a single undifferentiated space.
Solution Approach 2:
Different regions of the gathering module have different characteristics tailored to local needs. The entrance zone has baffles positioned to capture and redirect high-velocity gas, the gathering zone has configurations optimized for web formation, and the exit zone maintains stability. The conveyor belt also has variable speed zones. This local differentiation allows each region to address specific challenges without compromising overall performance.
2Device complexity
If existing fiber gathering equipment is used, then the equipment structure can be simpler, but turbulence in the gas stream increases causing variations in fiber density
Solution Approach 1:
Baffles serve as intermediary elements between the high-velocity gas stream and the fiber web. These baffles intercept and redirect the gas flow, converting turbulent kinetic energy into more uniform flow patterns before the gas reaches the fiber web. The conveyor belt acts as another intermediary, providing a stable surface that further dampens turbulence and promotes uniform fiber deposition. These intermediaries protect the fiber web from direct exposure to turbulent gas without requiring complex active control systems.
3Productivity
If existing equipment is used, then the equipment can handle high production rates, but disruptions in the fiber web occur leading to quality variations
Solution Approach 1:
The entrance zone baffles are positioned to preemptively redirect high-velocity gas away from the fiber web before the web can be disrupted. The conveyor belt speed is optimized in advance to match fiber deposition rates, preventing accumulation or gaps. These preliminary actions prevent disruptions before they occur, ensuring continuous reliable operation at high production rates without requiring complex real-time intervention systems.
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
This solution effectively reduces variations in fiber density, leading to a more uniform and consistent product quality, and allows for higher production rates without disruptions.
Implementation Method 1
a conveyor belt, to move the fibres in a downstream direction, orthogonally with respect to the direction of the gas stream
Implementation Method 2
an enclosure with baffles to separate surplus gas from the fibres, reducing turbulence and stabilizing the fiber web
Data Source
Figure 1
Figure 2
Figure 2A
AI summary
A method of, and equipment for gathering fibres (12) entrained a gas stream, for example by melt blowing, comprises an enclosure (50) having an inlet (57), through which a gas stream carrying entrained fibres (12) may be directed into the enclosure (50), a fibre outlet (58) from which an assembly of gathered fibres (12) may be withdrawn from the enclosure (50) and an exhaust outlet (41) through which gas may pass out of the enclosure (50). The enclosure (50) is constructed to provide a pathway for the fibres (12) from the inlet (57) to the fibre outlet (58) in which surplus gas in the gas stream is separated from the entrained fibres (12) and directed to the exhaust outlet (41), thereby reducing turbulence in the fibres (12) in the enclosure (50) which may affect the quality of the finished assembly.