Multilayer Electrostatic Pad for Carbon Fiber Handling
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Solution Overview
Problem
Conventional electrostatic pad designs used for picking up dry carbon fiber sheets suffer from limitations in adhesion strength, which affects the efficiency of 2D and 3D pick-and-place operations.
Innovation Solution
The electrostatic pad features a first planar array of first electrodes arranged in a first pattern and a second planar array of second electrodes arranged in a second pattern that is different from the first pattern, with the two arrays disposed parallel to each other. The electrodes have opposite polarities, and a third layer of electrically insulative material is sandwiched between the arrays, allowing for a significant voltage difference without arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional electrostatic pad designs are used, then the structure is simple, but the adhesion strength is limited
Solution Approach 1:
The patent transitions from a conventional single-layer electrode configuration to a multilayer structure with first and second planar arrays of electrodes arranged in different patterns. This dimensional change allows the creation of multiple electrostatic interaction zones, significantly enhancing adhesion strength while managing structural complexity through systematic layering.
Solution Approach 2:
The electrode system is segmented into multiple independent planar arrays (first and second arrays) with distinct patterns. Each array can be independently controlled and contributes to the overall adhesion force, allowing the system to achieve high adhesion strength through cumulative effect of multiple segmented electrode groups.
2Strength
If higher voltage difference is applied to increase adhesion, then adhesion strength improves, but arcing between adjacent electrodes occurs
Solution Approach 1:
By arranging electrodes in multiple planar layers with different patterns rather than a single plane, the patent increases the spatial separation between electrodes of opposite polarity. This dimensional arrangement allows application of higher voltage differences (greater than 1.3 kV) without causing arcing, as the electric field lines are distributed through three-dimensional space rather than concentrated in a single plane.
Solution Approach 2:
The patent introduces an electrically insulative material as an intermediary between adjacent electrodes. This insulative material prevents direct electrical breakdown and arcing between electrodes while allowing the electrostatic field to maintain adhesion force, enabling safe operation at high voltage differences.
3Strength
If multilayer electrode configuration is implemented to enhance adhesion, then adhesion strength increases, but manufacturing complexity increases
Solution Approach 1:
The patent implements a multilayer electrode configuration with first and second planar arrays arranged in different patterns. While this increases manufacturing complexity compared to single-layer designs, the systematic layering approach allows for standardized fabrication processes and enables significantly enhanced adhesion strength that justifies the additional manufacturing steps.
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 configuration enhances the electrostatic adhesion strength, enabling the efficient picking up and transportation of dry carbon fiber sheets without the limitations of conventional designs.
Implementation Method 1
An electrostatic pad may be electrified to produce a voltage difference thereacross, which thereby presents an electrostatic adhesion potential across the pad. This electrostatic adhesion may then be used to attract and retain a dry carbon fabric sheet in contact with the pad
Implementation Method 2
a third layer of electrically insulative material sandwiched between the first and second planar arrays, wherein the third layer may have a third layer thickness and wherein the gap amount may be approximately ten times the third layer thickness
Data Source
AI summary
An electrostatic pad includes a first planar array of first electrodes arranged in a first pattern, and a second planar array of second electrodes arranged in a second pattern that is different from the first pattern, wherein the first and second planar arrays are disposed parallel to each other. A third layer of electrically insulative material may be sandwiched between the first and second planar arrays of respective first and second electrodes.