Scattering Devices for Custom Material Distribution in Needle-Punched Nonwovens
Solution Overview
Problem
Existing methods for producing multi-layer needle mats do not allow for the introduction of the same or different materials across the thickness and/or width of individual layers during manufacturing, limiting the ability to customize material distribution and layer properties.
Innovation Solution
A device with scattering devices located between card transport belts enables the application and control of various materials, such as fibers, flakes, and powders, between fibrous web layers, allowing for the formation of a material composite that can be needled to meet specific acoustic and mechanical requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional multi-layer needle mat production methods are used, then production process is simple, but material distribution across thickness and width cannot be customized
Solution Approach 1:
The production device is segmented into multiple independent scattering devices (4, 5, 6, 7), each capable of distributing materials to specific layers. This segmentation allows customized material distribution across different thickness and width positions while maintaining overall system functionality.
Solution Approach 2:
Different scattering devices are configured to apply same or different materials to different layers based on local requirements. The system enables local quality variation by controlling material type, quantity, and distribution pattern for each specific layer position.
2Productivity
If lamination process is used to create multi-layer structures, then layer bonding is achieved, but production cycle time increases
Solution Approach 1:
The scattering devices integrate material distribution and layer formation into a single simultaneous process, eliminating the need for separate lamination steps. Multiple layers with customized material distributions are created in one continuous operation, reducing cycle time while maintaining manufacturing simplicity.
Solution Approach 2:
Materials are distributed and layers are formed in the correct sequence before needling occurs. The scattering devices prepare the complete multi-layer structure with all materials in place beforehand, allowing the needling process to simply consolidate the already-positioned layers without requiring subsequent lamination.
3Reliability
If uniform material distribution is applied across all layers, then production process is simple, but acoustic and mechanical requirements cannot be optimized
Solution Approach 1:
The scattering devices enable different material types and quantities to be applied to different layers based on specific acoustic and mechanical requirements. Each layer can be optimized with appropriate materials (same or different) to achieve target performance characteristics while the system maintains controllable complexity through modular device design.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The invention relates to an apparatus for producing needle-punched nonwovens, which enables different materials to be introduced into the individual layers over the nonwoven thickness and/or nonwoven width during production thereof.