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US 4,439,929 AGranted
Apparatus for drying a ceramic green honeycomb body
AssigneeNGK Insulators, Ltd.
InventorsJiro Kitagawa, Isao Mizutani
Life of this patent
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Abstract
The disclosed apparatus is for drying a ceramic green honeycomb body by dielectric heating, which apparatus comprises a support board disposed between two electrodes for the dielectric heating, the support board having a tray-like metallic first part to support the ceramic green honeycomb body and a plate-like non-metallic second part to hold the first part.
Claims18
An apparatus for drying a ceramic green honeycomb body, comprising two electrodes facing toward each other with a spacing therebetween, one of the electrodes is grounded;
- a dielectric heating energy source is connected to the electrodes;
- and a support board is provided adjacent to the grounded electrode, between the two electrodes facing each other, the support board comprises a tray-like metallic first part designed to support the ceramic green honeycomb body and a plate-like non-metallic second part designed to hold the metallic first part, the tray-like metallic first part covering only a portion of the plate-like non-metallic second part, with the surface of the metallic first part being larger than that section of the ceramic green honeycomb body which is in contact with the metallic first part, the tray-like metallic first part is arranged so that it is isolated from any other tray-like metallic first parts by free areas on the support board so that during a drying operation a higher density of electric lines of force pass through the plate-like metallic first part than through the free areas.
An apparatus for drying a ceramic green honey-comb body, comprising two electrodes facing toward each other with a spacing therebetween, one of the electrodes is grounded;
- a dielectric heating energy source is connected to the electrodes;
- and a support board is provided adjacent to the grounded electrode and between the two electrodes facing each other, the support board comprises a tray-like metallic first part designed to support the ceramic green honeycomb body and a plate-like non-metallic second part designed to hold the metallic first part, with the surface of the metallic first part being larger than that section of the ceramic green honeycomb body which is in contact with the metallic first part, the tray-like metallic first part covering only a portion of the plate-like non-metallic second part, the tray-like metallic first part is arranged so that it is isolated from any other tray-like metallic first parts by free areas on the support board so that during a drying operation a higher density of electric lines of force pass through the tray-like metallic first part than through the free areas;
- an air supply means for forcing air to flow through the ceramic green honeycomb body, wherein the metallic tray-like first part of the support board has perforations bored therethrough and the ceramic green honeycomb body has through holes, the plate-like non-metallic second part has at least one opening therein which is covered by the tray-like metallic first part, whereby the metallic first part supports the ceramic green honeycomb body in such a manner that the through holes of the ceramic green honeycomb body are in communication with the through holes of the metallic first part and the opening in the plate-like non-metallic second part so as to dry the green honeycomb body.
An apparatus for drying a ceramic green honeycomb body, comprising two electrodes facing toward each other with a spacing therebetween, one of the electrodes is grounded;
- a dielectric heating energy source is connected to the electrodes;
- and a support board is provided adjacent to the grounded electrode and between the two electrodes facing each other, the support board comprises a tray-like metallic first part designed to support the ceramic green honeycomb body, having perforations bored therethrough, and a plate-like non-metallic second part with at least one opening designed to hold the metallic first part over the opening so that the majority of the perforations communicate with the opening, with the surface of the metallic first part being larger than that section of the ceramic green honeycomb body and a side surface of the ceramic green honeycomb body which is in contact with the metallic first part, the tray-like metallic first part is arranged so that it is isolated from any other tray-like metallic first parts by free areas on the support board so that during a drying operation a higher density of electric lines of force pass through the tray-like metallic first part than through the free areas;
- an air supply means for forcing air to flow through the ceramic green honeycomb body so as to dry the green honeycomb body;
- a forced-wind drier unit disposed in series with a dielectric drier unit defined by electrodes, the support board, and the dielectric heating energy source, the forced-wind drier unit having the air supply means disposed therein;
- wherein said dielectric drier unit comprises a dielectric drier conveyor designed to carry the support board between the two electrodes;
- and the forced-wind drier unit comprises a forced-wind drier conveyor designed to carry the support board through the forced-wind drier unit.
3 more elements
Dependencies are inferred from the claim text.