Fabric handling apparatus
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Solution Overview
Problem
Current methods for handling fabric materials in composite component manufacturing, such as aircraft components, are prone to errors due to manual handling, which can result in stretching, creasing, or damage, leading to increased production times and reduced reproducibility.
Innovation Solution
A fabric handling apparatus that includes a layup table and a mold with a fabric handling array of attractors, which can pick up and transfer fabric shapes without deformation, using suction or electrostatic forces, and is equipped with robots for precise measurement and orientation, ensuring accurate placement on a mold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual handling methods are used to transfer fabric, then flexibility and adaptability are maintained, but fabric damage (stretching, creasing) increases and production time increases
Solution Approach 1:
The patent replaces manual mechanical handling with an automated vacuum-based handling system. The vacuum array picks up fabric plies through suction forces applied at multiple discrete locations, eliminating manual contact that causes stretching and creasing. This substitution maintains fabric integrity while enabling automated, high-speed transfer operations.
Solution Approach 2:
The patent employs a vacuum (pneumatic) system to handle fabric plies. A vacuum source creates negative pressure that draws fabric into contact with the vacuum array, which then transports the fabric through the molding process. This pneumatic mechanism provides gentle, distributed contact that prevents fabric damage while enabling automated handling at high speeds.
2Productivity
If gripping tools are used to handle fabric, then handling speed may improve, but fabric damage at gripper locations increases
Solution Approach 1:
The patent replaces mechanical gripping tools with a vacuum field-based handling system. Instead of concentrated mechanical forces from gripper fingers that create localized damage, the vacuum system distributes contact forces across the entire fabric surface through numerous small vacuum ports, eliminating stress concentration and associated fabric damage.
Solution Approach 2:
The vacuum array incorporates porous or perforated elements that allow vacuum pressure to act uniformly across the fabric surface. The porous structure enables distributed suction contact rather than concentrated gripping points, preventing the localized damage that occurs with traditional mechanical grippers while maintaining high handling speed.
3Manufacturing precision
If automated vacuum-based handling is used, then fabric damage is minimized and handling precision improves, but device complexity increases
Solution Approach 1:
The patent divides the fabric handling function into discrete, modular vacuum elements arranged in an array. Each vacuum port or cell operates independently or in coordinated groups, allowing precise control over which portions of the fabric are held and how they are positioned. This segmentation enables complex placement patterns while using relatively simple, standardized vacuum components.
Solution Approach 2:
The vacuum array system serves multiple functions: picking up fabric, holding it during transfer, positioning it precisely, and releasing it at the target location. This multi-functional approach eliminates the need for separate mechanisms for each operation, reducing overall system complexity despite the sophisticated handling capabilities achieved.
4Device complexity
If manual layup processes are used, then equipment cost is reduced, but production time increases and reproducibility decreases
Solution Approach 1:
The vacuum handling system is designed to automatically perform fabric pickup, transfer, and placement operations without manual intervention. The system self-regulates through vacuum pressure control, enabling continuous high-speed operation that dramatically reduces production time compared to manual processes, while the modular design keeps equipment complexity manageable.
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 apparatus improves the reliability and accuracy of fabric handling, reducing production time and minimizing fabric damage, thereby enhancing the quality and consistency of composite components.
Implementation Method 1
a fabric handling array 34 of attractors 36 that can pick up the fabric 24 from the layup table 20
Implementation Method 2
using suction or electrostatic forces
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fabric handling apparatus includes a layup table (20), a mold (22) disposed adjacent to the layup table (20), and a fabric handling array (34) suspended above the layup table (20) and the mold (22). The fabric handling array (34) is adapted to transfer at least one fabric shape (62) from the layup table (20) to the mold (22). The fabric handling array (34) includes a plurality of attractors (36) in an attractor array. An orientation of the fabric handling array (34) is alterable with respect to at least one of the layup table (20) and the mold (22) so that the at least one fabric shape (62) is positionable on the mold (22) in a predetermined orientation.