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Storage of Raw Materials used for Veneer Production

Storage of Raw Material used for Veneer Production

Topics

Transport of Logs from Forest to Log Dump

Logs up to a full tree length are hauled or snigged depending upon logging conditions and facilities available. The veneer logs are cross cut to length consistent with the means of transport (usually by truck in Australia). For export, the lengths are determined by market requirements and practices.

Storage at Log Yard

Logs delivered to the log yard should be processed as soon as possible to minimise the degrade or deteriation caused by insect and fungi attack. Depending upon the area and type of storage facilities available, logs are either piled dry and kept wet by a continuos or intermittent water spray, or are stored in freshwater ponds. Providing the log is completely submerged or circulating water, or by water which has been treated to prevent the growth of organism under stagnant conditions, logs can be preserved up to a year (Baldwin 1981). Even with availability of long storage periods it is advised to peel logs as soon as possible. As fresh logs when processed yield clean uniform veneers which bond well. Whereas older logs produce rough veneers with high uneven moisture content, both these factors cause gluing problems (Evans 1996).

Pond Storage

Baldwin (1981) suggests that logs stored in ponds are not completely protected. The part of the log above water will dry and check and can cause difficulties during peeling. Drying and checking can be prevented by pumping water from the pond and returned through a spray system directed to the exposed surface of the log.

Dryland storage

Dryland storage of logs under sprinkler systems must give complete coverage of the log piles and must be kept in continuos operation during high temperatures and humidity in order to minimise fungal growth and to prevent drying out and degradation(Evans 1996).

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