Dielectric Drying Electrode Spacing for Ceramic Uniformity
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Solution Overview
Problem
Dielectric drying methods for ceramic formed bodies often result in non-uniform drying, leading to cracks and variations in ceramic structure dimensions, particularly in the direction perpendicular to the conveying direction, due to uneven field intensity and drying rates across the drying table.
Innovation Solution
A dielectric drying method and apparatus where the distance between electrodes is controlled such that it is shorter in end regions than in the central region, ensuring uniform field intensity and drying rates across the width of the drying table, with adjustable electrode structures and auxiliary electrodes to maintain consistent electric force density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dielectric drying is performed with uniform electrode spacing, then the drying process is simple to implement, but non-uniform drying occurs causing cracks and dimensional variations
Solution Approach 1:
The electrode spacing is made non-uniform with shorter spacing in end regions and longer spacing in central regions. This local variation in electrode configuration compensates for the non-uniform field intensity distribution, ensuring uniform drying conditions across all positions of the ceramic formed body and preventing cracks and dimensional variations.
2Productivity
If electrode distance is reduced to increase field intensity, then drying rate improves, but field intensity becomes non-uniform across the drying table
Solution Approach 1:
The electrode distance is locally adjusted based on position requirements. End regions have shorter electrode distances to compensate for lower field intensity, while central regions have longer distances to prevent excessive field intensity. This creates a non-uniform electrode spacing configuration that results in uniform overall field intensity distribution, improving drying uniformity without compromising drying rate.
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 approach effectively suppresses variations in dried states of ceramic formed bodies, ensuring uniform drying and reducing the likelihood of cracks and non-uniform dimensions, facilitating the production of ceramic structures with consistent shapes.
Implementation Method 1
a current can be conducted through the electrodes to subject a dipole of water in the ceramic formed body to molecular movement, and the ceramic formed body can be dried by the frictional heat
Data Source
AI summary
A dielectric drying method for ceramic formed bodies includes drying a plurality of ceramic formed bodies placed side by side in a direction perpendicular to a conveying direction on upper surfaces of drying tables by conveying the ceramic formed bodies between electrodes of an upper electrode and a lower electrode, and applying a high frequency between the electrodes. In the direction perpendicular to the conveying direction of the ceramic formed body, a distance between the electrodes in two end regions between which a central region is interposed is shorter than a distance between the electrodes in the central region.