Download or read book Quality Control in Lumber Manufacturing written by Terence D. Brown and published by Backbeat Books. This book was released on 1982 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simplified Quality Control in Lumber Manufacturing written by Salim Hiziroglu and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reverse Proof Loading as a Means of Quality Control in Lumber Manufacturing written by Lisa Anne Marin and published by . This book was released on 1979 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Control in Manufacture of Lumber from Second Growth written by Forest Products Laboratory (U.S.) and published by . This book was released on 1962 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Quality Control in Redwood Lumber Manufacture written by Kenneth Francis Laudenschlager and published by . This book was released on 1953 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Control in Manufacture of Lumber from Second Growth written by and published by . This book was released on 1962 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Drying of Hardwood Lumber Guidebook checklist written by R. Sidney Boone and published by . This book was released on 1992 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IMPROVE Lumber Drying Program is intended to increase awareness of the lumber drying system as a critical component in the manufacture of quality lumber. One objective of the program is to provide easy-to-use tools that a kiln operator can use to maintain an efficient kiln operation and therefore improve lumber drying quality. This report is one component of the IMPROVE Program. It contains a Guidebook-Checklist for Quality Drying of Hardwood Lumber that kiln operators or owners can use to readily evaluate how well their operations rate on those factors that most strongly affect drying quality, with particular emphasis on kiln operation and maintenance and lumber handling. Appendix 1 contains a shortened version of the checklist for easy duplication and filing. Appendix 2 contains the same checklist items; however, the information is arranged by drying system components for convenience in checking individual components.
Download or read book Nondestructive Evaluation of Wood written by Forest Service (U S ) and published by Government Printing Office. This book was released on 2015 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nature's engineering of wood through genetics, wind, and weather creates a wide variability in wood as a material. Consequently, manufacture and users of wood products are frequently frustrated in dealing with the forest resource. Manufacturers sometimes argue that wood is difficult to consistently process into quality products because of the wide range of properties that exist in this raw material. Users of wood products can be equally frustrated with the performance variability found in finished products. Nondestructive evaluation (NDE) technologies have contributed significantly toward eliminating the cause of these frustrations. NDE technologies have been developed and are currently used in lumber and veneer grading programs that result in engineered materials that have consistent well-defined performance characteristics. This brief volume explores some of the processes that are used to manufacture wood, including green wood technology and provides a bit of history to wood production and its uses too. Other products that may interest you from the US Forest Service can be found at this link: https://bookstore.gpo.gov/agency/819
Download or read book Quality Control in Southern Pine Mills written by Joseph Denig and published by . This book was released on 1989 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Control and Inspection of Laminated Timber Construction written by T. E. Brassell and published by . This book was released on 1964 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quality control and inspection of glued laminated timber construction require that each plant have a quality control organization working closely with production personnel. A plant procedures manual and a quality control manual should be developed to include provisions for checking all production procedures and for the inspection and testing of the finished product.
Download or read book Quality Control for Lumber Products written by E. M. Williston and published by . This book was released on 1964 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes procedures used during manufacture to control the quality of dimension and finish lumber, end- and edge-glued lumber, water-repellent-treated wood products, prime painted products, and laminated beams. A test method is outlined for comparing the extractive stain resistance of paints applied to cedar or redwood siding. A novel method is described for ascertaining the degree of sticking or blocking that will occur during shipment of factory-painted lumber.
Download or read book Standard for the Assurance of Quality of Batch Drying of Timber written by and published by . This book was released on 1985-01-01 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On line Lumber Quality Control Technique Using Image Processing written by Fatima Aslam and published by . This book was released on 1990 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Product quality control is the back bone for an efficient process control system. By monitoring the size of the board cut in a sawmill, performance of the production system can be controlled. Feedback from the quality control system is used to evaluate the status of the production system and also used for preventive maintenance of the system. The software technique developed in this thesis involves three parts: image acquisition and analysis, quality control analysis, and power consumption analysis. An image of the boards is acquired, and board edges are identified and analyzed to compute the board widths. The effects of defects present on the board surface on the computation of board width are studied. The effect of camera distance from the surface of the object is also analyzed. Computed widths were compared with values measured with a caliper. The quality control program reads the computed board widths and then checks the measurements against control limits. The program also computes board averages and standard deviations and checks the averages against control limits. Between board deviations within cants and between saw pockets are also computed. The n board averages are displayed to check the process status. A power meter is used to monitor the power consumption of the production system. A program was developed to read the power meter and to display the data in a control chart or in tabular form as a means of checking the power consumption of the system.
Download or read book Performance Analysis of the Hardware and Software Components of an Optical Scanning System for Monitoring Lumber Sizes written by Scott A. Leavengood and published by . This book was released on 1994 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the forest products industry has been forced to cope with a supply of raw material that is declining in both quality and quantity. In addition, log prices are escalating rapidly. Because log costs may represent as much as 90 percent of the overall production costs of lumber (Williston, 1985), it is crucial that a mill make every attempt to maximize grade and recovery. Quality control (QC) is a broad term used loosely to indicate producing a product to meet the customer's Specifications. In lumber production, quality control is heavily influenced by meeting lumber grade requirements while minimizing fiber use. One component of these grade requirements is conformance to size standards. Size control is one of the functions of a mill's QC department. Size control for lumber manufacturing involves minimizing the variations in the dimensions of lumber that are introduced by the sawing process. An adequate size control program enables a sawmill to maximize both grade and recovery. Grade may be maximized by reducing the amount of boards downgraded due to either excess wane or from planer skip that can result from excessive sawing variation. Minimization of sawing variation can also lead to maximizing recovery. It should be made clear that the reduction in target size that can result from minimizing sawing variation will most often result in a slightly longer or wider board from any one log rather than obtaining additional boards (Darwin, 1989). There are however certain limited log diameter breakpoints at which additional boards may be obtained due to decreased sawing variation. What is proposed in this project is an automated system to collect and analyze board measurement information using optical scanning techniques. The system is intended to provide feedback to mill quality control personnel. This thesis has built upon the image processing and quality control system developed by Aslam (1990) at the Department of Forest Products at Oregon State University. The system is discussed in Aslam's M.S. thesis as well as in the article by Funck et al. (1992). The image processing system scans the edges of boards while still held in cant form after leaving a gang edger. The system can provide lumber thickness as well as kerf width data. A size control program is included to analyze measurement data and provide information regarding sawing variation. A far more detailed representation of sawing variation can be obtained using this system than is possible with standard size control practices providing measurement accuracy is sufficient. For instance, at gang edgers immediate feedback regarding sawing variation for both boards and kerf is provided. Sawing variation information is of sufficient detail for diagnosing which machine center, and more specifically, which pocket of saws is causing sawing problems. This thesis continued the previous work by quantifying measurement accuracy using various hardware and software configurations, and by developing the software necessary to analyze and then display the data in the most meaningful form. Software techniques were created to avoid measurement errors. The first step in the project was a pilot study conducted using several different imaging configurations, noise filtering techniques, and edge-detection algorithms to quantify the system's precision in measuring static objects. The second step was to develop display software to convey the detailed information this system can provide. The development of measurement error trapping mechanisms was the third step. Measurement errors may occur through incorrectly locating the edges of boards due to the presence of wane, bark, pitch or bark pockets, or knots. Measurement errors may also occur when physically blocked saw kerfs cause a failure to detect a board edge. Lastly, the system was tested on images representing a range of measurement difficulty. This test was performed to determine the measurement accuracy of the system when using combinations of three different edge-detection algorithms and three different noise filtering techniques. This type of automated measurement collection, data analysis and display system will have a financial benefit to a mill by enabling the mill to quickly identify and correct situations leading to sub-optimal lumber or grade recovery.
Download or read book Primary Wood Processing written by John C.F. Walker and published by Springer Science & Business Media. This book was released on 2006-09-13 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is primarily a general text covering the whole sweep of the forest industries. The over-riding emphasis is on a clear, simple interpretation of the underlying science, demonstrating how such principles apply to processing operations. The book considers the broad question "what is wood?" by looking at the biology, chemistry and physics of wood structure. Wood quality is examined, and explanations are offered on how and why wood quality varies and the implications for processing. Finally, various "industrial processes" are reviewed and interpreted. All chapters have been written by specialists, but the presentation targets a generalist audience.
Download or read book Manufacturing quality structural lumber from hardwoods using the saw dry rip process written by Robert R. Maeglin and published by . This book was released on 1981 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proof Loading of Lumber for Quality Control written by Frank E. Woeste and published by . This book was released on 1984 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
