PDF Publication Title:
Text from PDF Page: 026
2.5.3. Quality Control after Drying Records of every charge can be kept which will help the kiln operator evaluate the general performance of the kiln (Myers, 2000). Information about critical variables can be taken during storage and shipping of the material. The common industrial way to measure moisture content of dried lumber is to use electrical resistance meters. Other types of meters like dielectric or capacitance can also be used (Wengert, 1994b). 2.5.4. Maintenance of Monitoring Equipment Proper maintenance of monitoring equipment is essential to avoid erroneous measurements. Otherwise poor control of the drying process can result in increased defects and longer drying times. Kiln operators should become acquainted with maintenance procedures. M aintenance items include frequent replacement of instruments' filters, lubrication, and replacement of broken glasses. In addition, inaccurate measurements call for calibration which should be attempted with caution. It is recommended that trained technicians be employed to repair damaged equipment (Boone & Simpson, 1997b). 2.6. DRIED PRODUCT QUALITY Drying degrade results in extensive losses of both money and fibre. This translates into a negative effect to a company's performance. Assessment of drying degrade and identification of possible causes are vital to achieve high quality products. Minimizing defects and drying wood economically are objectives of primary importance for kiln drying (Ward & Simpson, 1997). Various types of defects result for different reasons. Their importance depends on their type, defect extent and the end use of the product. In the case of softwoods, drying degrade can affect as many as one in every four pieces (Wengert, 1990). Drying defects can be classified in the following categories: a) discolourations, b) shape deformations, c) uneven moisture content, and d) rupture of wood tissue (Ward & Simpson, 1997). Casehardening can also be considered as another drying defect category, depending on whether or not wood will be further processed after drying (see section 2.6.5.) (Skaar, 1988). These defect categories are described in detail below. 17PDF Image | KILN DRYING PROBLEMS AND ISSUES IN CANADA
PDF Search Title:
KILN DRYING PROBLEMS AND ISSUES IN CANADAOriginal File Name Searched:
ubc_2004-0049.pdfDIY PDF Search: Google It | Yahoo | Bing
5,000 BF Shipping Container Lumber Dry Kiln For Quality Lumber The 5,000 BF container kiln consists of one 40 foot high-cube aluminum shipping container... More Info
Shipping Container Lumber Dry Kilns by Global Energy Global Energy designed and developed the container kiln back in 1991. The purpose is to give access to portable sawmill owners, furniture makers, and small business the value added profit of dry kiln lumber and quality hardwoods... More Info
Vacuum Kiln Conversion Kit for Lumber and Wood Dry Kilns Convert your existing conventional dry kiln into a fast drying vacuum kiln. Similar to vacuum bagging in the boat building and aircraft industry, we have come up with a proprietary process which allows you to build a very simple vacuum kiln at a fraction of the price, and without the intensive conventional metal chamber structure... More Info
Vacuum Pump Cart System for Bagging Clamping Wood Drying and more Vacuum Cart with 2HP Pump and Dual Pistons with multiple multiplex vacuum ports and liquid reservoir... More Info
Vacuum Bagging Basics Vacuum bagging is a method of clamping, which has traditionally been used in the composites industry, but can also be used for vacuum drying materials, including wood products... More Info
| CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com | RSS | AMP |