Seasoning of Wood

A TREATISE ON THE NATURAL AND ARTIFICIAL PROCESSES EMPLOYED IN THE PREPARATION OF LUMBER FOR MANUFACTURE, WITH DETAILED EXPLANATIONS OF ITS USES, CHARACTERISTICS AND PROPERTIES
ILLUSTRATIONS
BY JOSEPH B. WAGNER AUTHOR OF COOPERAGE
NEW YORK D. VAN NOSTRAND COMPANY 25 PARK PLACE 1917
COPYRIGHT, 1917, BY D. VAN NOSTRAND COMPANY THE·PLIMPTON·PRESS NORWOOD·MASS·U·S·A
The seasoning and kiln-drying of wood is such an important process in the manufacture of woods that a need for fuller information regarding it, based upon scientific study of the behavior of various species at different mechanical temperatures, and under different drying processes is keenly felt. Everyone connected with the woodworking industry, or its use in manufactured products, is well aware of the difficulties encountered in properly seasoning or removing the moisture content without injury to the timber, and of its susceptibility to atmospheric conditions after it has been thoroughly seasoned. There is perhaps no material or substance that gives up its moisture with more resistance than wood does. It vigorously defies the efforts of human ingenuity to take away from it, without injury or destruction, that with which nature has so generously supplied it.
In the past but little has been known of this matter further than the fact that wood contained moisture which had to be removed before the wood could be made use of for commercial purposes. Within recent years, however, considerable interest has been awakened among wood-users in the operation of kiln-drying. The losses occasioned in air-drying and improper kiln-drying, and the necessity for getting the material dry as quickly as possible after it has come from the saw, in order to prepare it for manufacturing purposes, are bringing about a realization of the importance of a technical knowledge of the subject.
Since this particular subject has never before been represented by any technical work, and appears to have been neglected, it is hoped that the trade will appreciate the endeavor in bringing this book before them, as well as the difficulties encountered in compiling it, as it is the first of its kind in existence. The author trusts that his efforts will present some information that may be applied with advantage, or serve at least as a matter of consideration or investigation.

J. B. Wagner
Содержание

SEASONING OF WOOD


TIMBER


Characteristics and Properties


Structure of Wood


Properties of Wood


Classes of Trees


CONIFEROUS TREES


WOOD OF THE CONIFEROUS TREES


BROAD-LEAVED TREES


WOOD OF BROAD-LEAVED TREES


GRAIN, COLOR, ODOR, WEIGHT, AND FIGURE IN WOOD


DIFFERENT GRAINS OF WOOD


ENEMIES OF WOOD


Ambrosia or Timber Beetles


Round-headed Borers


Flat-headed Borers


Timber Worms


Powder Post Borers


Conditions Favorable for Insect Injury—Crude Products—Round Timber with Bark on


How to Prevent Injury


Saplings


Stave, Heading and Shingle Bolts


Unseasoned Products in the Rough


Seasoned Products in the Rough


Dry Cooperage Stock and Wooden Truss Hoops


Staves and Heads of Barrels containing Alcoholic Liquids


WATER IN WOOD


DISTRIBUTION OF WATER IN WOOD


WHAT SEASONING IS


Difference between Seasoned and Unseasoned Wood


Manner of Evaporation of Water


Rapidity of Evaporation


Physical Properties that influence Drying


ADVANTAGES IN SEASONING


Prevention of Checking and Splitting


Shrinkage of Wood


Expansion of Wood


Elimination of Stain and Mildew


DIFFICULTIES OF DRYING WOOD


Changes rendering Drying difficult


Losses Due to Improper Kiln-drying


Properties of Wood that affect Drying


Unsolved Problems in Kiln-drying


HOW WOOD IS SEASONED


Methods of Drying


Drying at Atmospheric Pressure


Drying under Pressure and Vacuum


Drying by Superheated Steam


Impregnation Methods


Preliminary Treatments


Out-of-door Seasoning


KILN-DRYING OF WOOD


Advantages of Kiln-drying over Air-drying


Physical Conditions governing the Drying of Wood


Theory of Kiln-drying


Requirements in a Satisfactory Dry Kiln


Theory and Description of the Forestry Service Kiln


Underlying Principles


Objects of Kiln-drying


Conditions of Success


Different Treatment according to Kind


Temperature depends


Air Circulation


Humidity


Kiln-drying


Kiln-drying Gum


Kiln-drying of Green Red Gum


TYPES OF DRY KILNS


DIFFERENT TYPES OF DRY KILNS


DRY KILN SPECIALTIES


KILN CARS AND METHOD OF LOADING


HELPFUL APPLIANCES IN KILN-DRYING


The Humidity Diagram


Examples of Use


The Hygrodeik


The Recording Hygrometer


The Registering Hygrometer


The Recording Thermometer


The Registering Thermometer


The Recording Steam Gauge


The Troemroid Scalometer


Keep Records of the Moisture Content


The Electric Heater

О книге

Язык

Английский

Год издания

2008-09-12

Темы

Lumber -- Drying

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