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Title:
PROCESSING METHOD FOR LUMBER
Document Type and Number:
Japanese Patent JPH03151202
Kind Code:
A
Abstract:

PURPOSE: To prevent adhesion of a chemical agent to a cutting blade and generation of burn in a cut surface of lumber, by cooling a cutting processing blade and a part of the lumber to be cutting-processed with a low-temperature refrigerant such as liquid nitrogen.

CONSTITUTION: A blade 1 and a cut part of impregnation-treated lumber 2 with a chemical agent are covered with a hood 3 provided with a discharge duct 3a, a liquid nitrogen is introduced into the hood 3 from a Dewar-shaped liquid nitrogen cylinder 4 through a reducing valve 5 and regulating solenoid valve 6 and the same is blown against the blade 1 and the cut part of the impregnation-treated lumber 2. The solenoid valve 6 is connected with a temperature control device 8 actuating by receiving a signal of a thermistor temperature sensor 7 provided within the duct 3a. With this construction, if the thermistor temperature sensor 7 is established at a fixed temperature, the liquid nitrogen is regulated and blown off. The blade 1 and cut part are held at almost a fixed low-temperature and adhesion of the chemical agent to the blade 1 and generation of burn in a mold 2a are eliminated.


Inventors:
OTANI KOICHI
Application Number:
JP29202889A
Publication Date:
June 27, 1991
Filing Date:
November 09, 1989
Export Citation:
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Assignee:
YAMAHA CORP
International Classes:
B27M1/00; B27C1/00; (IPC1-7): B27C1/00; B27M1/00
Domestic Patent References:
JPS5078973A1975-06-27
JPS49133977A1974-12-23
JPS4980681A1974-08-03
Attorney, Agent or Firm:
Masatake Shiga (1 person outside)