NIR SPECTROSCOPIC MONITORING OF RESIN-LOADING DURING ASSEMBLY OF ENGINEERED WOOD PRODUCT

摘要

Calibrating near infra red (NIR) spectroscopic instrumentation forquantitative measurement of resin-loading of prepared wood materials, asmoving in an assembly-forming line, for subsequent pressing under heat andpressure for manufacture of engineered-composite wood product. Feedback ofmeasured data of resin-loading, during in-line assembly operations, enablesmaintaining consistent resin-loading and optimizes resin usage. Calibration ofNIR spectroscopic instrumentation can be carried out on equipment simulatingin-line movement of pre-established reference-source test-samples; or, can becarried out during on-line movement of wood-material test samples. Thedeveloped calibration method removes absorptive effects at wavelengths forconstituents other than resin, such as the moisture content of the wood-materials and of the resin, while maintaining accurate and prompt NIRspectroscopic measurements of resin-loading in a continuous assembly line.