Title:
METHOD OF DRYING LUMBER
Document Type and Number:
WIPO Patent Application WO/1992/015435
Kind Code:
A1
Abstract:
This invention provides a mehtod capable of drying a lumber without causing splits in and distortion of the lumber with an increased turnover of the drying machine, in which included are: a first process wherein the lumber is contained in a pressure vessel, saturated vapor is introduced to said vessel and discharged thereinto for varying the pressure in the vessel to obtain a uniform temperature within the lumber and saturated vapor in the vessel in the state of uniform temperature is discharged to boil and emit a full content of moisture in every tissue of the lumber so as to provide a uniformly dried state in the lumber; a second process to dry the lumber taken out from said pressure vessel by discharging free water present therein; and a third process wherein the lumber from which free water has been discharged is again received in the pressure vessel and a flow of superheated steam is created in said vessel to apply pressure and heat to the lumber for removing the moisture content, whereby a dried lumber free from a moisture gradient and not causing such gradient is provided.
Inventors:
IZUMI HYOGO (JP)
Application Number:
PCT/JP1992/000258
Publication Date:
September 17, 1992
Filing Date:
March 04, 1992
Export Citation:
Assignee:
IZUMI HYOGO (JP)
International Classes:
B27K5/00; F26B9/06; F26B1/00; F26B7/00; F26B25/22; (IPC1-7): B27K5/00
Foreign References:
| JPS57165206A | 1982-10-12 | |||
| JPH0298404A | 1990-04-10 | |||
| JPS574706A | 1982-01-11 | |||
| JPS56154012A | 1981-11-28 |
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