Title:
DRYING METHOD FOR THICK CERAMICS
Document Type and Number:
Japanese Patent JP2527861
Kind Code:
B2
Abstract:
PURPOSE: To sharply shorten drying time for thick ceramics, by a method wherein far infrared rays are used as a heat source, and the thick ceramics are dried at the inside of a furnace in the state of no-humidification and in the state heated at a specified temperature.
CONSTITUTION: Far infrared ray heaters 2 of the same number are respectively provided at the ceiling and bottom parts of a drying furnace 1. Suspension insulators 4 to be dried are placed on an aluminum shelf 3 provided between the far infrared ray heaters 2 at the ceiling and bottom parts, and are dried. At this time, at both sides of the drying furnace 1, thermal sensors 5 consisting of a pair of thermocouples are provided at the places where the thermal sensors 5 do not receive the far infrared rays directly and are in the vicinity of the suspension insulators 4, and on the basis of the output signal therefrom, an electric current applied to each of the heaters 2 is controlled, and thus temperature in the furnace is controlled. The thick ceramics are conveyed into the furnace in the state of no-humidification and in the state heated at an initial temperature under 140°C at its maximum are dried. In this way, drying time for the thick ceramics can be sharply shortened.
Inventors:
Hatano, Hitoshi
Application Number:
JP24584091A
Publication Date:
August 28, 1996
Filing Date:
September 25, 1991
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
F26B3/30; C04B33/30; F26B23/04; (IPC1-7): F26B3/30; C04B33/30; F26B23/04
Domestic Patent References:
| JPH03215338A |
Attorney, Agent or Firm:
杉村 暁秀 （外５名）