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The causes and occurence of warp in eastern spruce-pine-fir dimension lumber

https://library.fpinnovations.ca/en/permalink/fpipub1959
Author
Barbour, R.J.
Chauret, Gilles
Date
March 1993
Edition
38484
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Barbour, R.J.
Chauret, Gilles
Date
March 1993
Edition
38484
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Pinus
Spruce
Spruce Pine Fir
SPF
Series Number
Forestry Canada No. 37
3712K209
E-1403
Location
Ottawa, Ontario
Language
English
Abstract
Eastern SPF producters experience an average value loss of $10 to $16/mbf due to drying degrade. A clear understanding of how wood characteristics influence warp will make it easier to effectively modify drying processes to reduce these losses. The goal of this study was to categorize green lumber according to its potential to warp, dry the lumber using a typical industrial kiln schedule and assess whether pieces that either warped or remained straight were correctly identified. Experimental material was a sample of 440 black spruce 8-foot 2x4's from four grain defect groups. These were : 1) control, no grain defects; 2) cross grain but no compression wood; 3) compression wood but no cross grain; and 4) both cross grain and compression wood. Methods used to select lumber with either a high or low potential to warp were successful. Warp was found to be related to the severity of compression wood and cross grain in each piece. Lumber without cross grain or compression wood dried with very little warp. Lumber with both cross grain and compression wood had the lowest quality after drying.
Spruce-Pine-Fir - Warp
SPF Lumber
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2 : le déchiquetage : la qualité des copeaux : à la déchiqueteuse à disque

https://library.fpinnovations.ca/en/permalink/fpipub2106
Author
Pleau, J.H.
Date
January 1993
Edition
38642
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pleau, J.H.
Date
January 1993
Edition
38642
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Planers
Series Number
E-1844
Location
Ottawa, Ontario
Language
French
Abstract
Planers - Maintenance
Knives
Cutters
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3 : le déchiquetage : la qualité des copeaux : à la déchiqueteuse-équarisseuse (Canter)

https://library.fpinnovations.ca/en/permalink/fpipub2107
Author
Pleau, J.H.
Date
January 1993
Edition
38643
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pleau, J.H.
Date
January 1993
Edition
38643
Material Type
Research report
Physical Description
11 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Chippers
Series Number
E-1845
Location
Ottawa, Ontario
Language
French
Abstract
Chipper Canters - Maintenance
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4 : le tamisage des copeaux

https://library.fpinnovations.ca/en/permalink/fpipub2108
Author
Pleau, J.H.
Date
January 1993
Edition
38644
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pleau, J.H.
Date
January 1993
Edition
38644
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Chips
Sorting
Series Number
E-1846
Location
Ottawa, Ontario
Language
French
Documents
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Effect of degree and precision of side clearance angles on sawing accuracy

https://library.fpinnovations.ca/en/permalink/fpipub5501
Author
Kirbach, E.
Sykes, D.
Date
February 1993
Edition
37292
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Kirbach, E.
Sykes, D.
Date
February 1993
Edition
37292
Material Type
Research report
Physical Description
4 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saw tooth
Saws
Design
Series Number
W-971
Language
English
Abstract
This study evaluated the effects of different combinations of balanced and unbalanced saw tooth side clearance angles on circular saw deflections.
Saws - Maintenance
Saws - Tooth design
Cutting
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Top bevelling of rip saw teeth for improved saw performance and upgrading sawdust quality for pulp

https://library.fpinnovations.ca/en/permalink/fpipub5503
Author
Kirbach, E.
Sykes, D.
Date
April 1993
Edition
37299
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Kirbach, E.
Sykes, D.
Date
April 1993
Edition
37299
Material Type
Research report
Physical Description
11 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Utilization
Saws
Saw tooth
Kerf
Sawing
Saw dust
Design
Series Number
W-1000
Location
Vancouver, British Columbia
Language
English
Abstract
Standard tooth designs for ripsaws carry a cutting edge which is square in relation to the saw blade axis. This saw tooth design proved to be satisfactory in the past when saws were heavy in kerf and sawdust was not considered as an important fibre source for pulp or other fibre based products. Forintek recognized that this tooth design is not optimum for achieving the best sawing performance and producing high quality sawdust for pulp. This report describes the results of extensive sawing experiments carried out in both the laboratory and in the sawmill to develop a new tooth design.
Sawing - Thin kerf
Saws - Tooth design
Sawdust - Utilization for pulp
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An evaluation of lumber spray boxes at a coastal British Columbia sawmill

https://library.fpinnovations.ca/en/permalink/fpipub41115
Author
Groves, C. Kevin
Johnson, E.L.
Date
June 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Groves, C. Kevin
Johnson, E.L.
Date
June 1993
Material Type
Research report
Physical Description
5 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Spraying
Preservatives tests
Preservatives
Series Number
1743K202
W-1177
Location
Vancouver, British Columbia
Language
English
Abstract
Mould and stain became troublesome problems on lumber manufactured at a coastal British Columbia sawmill, and the difficulties were suspected to be a fault of the mill's antisapstain treatment. Forintek technical staff visited the sawmill and planer mill and used two procedures to gather assessment. Firstly, boards were pulled from spray box chains after spray treatment and one-inch square samples were punched from four faces of these boards for chemical analysis of DDAC, one of the active ingredients in the formulation being used. With a large number of samples, this procedure quantitatively assessed DDAC retention levels at points along boards. Secondly, fluorescent dye was added to the spray solutions and special paper strips were stapled along the length of boards prior to treatment in the spray box. The paper strips were then retrieved for examination under ultraviolet light. This procedure is largely a qualitative one, showing the pattern of spray coverage over the whole board. Liquid samples of the treatment solutions were taken from both the sawmill and planer cross chain day tanks to determine their DDAC concentrations.
Spraying
Preservatives - Tests
Documents
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Transient event simulation : progress report

https://library.fpinnovations.ca/en/permalink/fpipub41563
Author
Harless, T.E.G.
Date
March 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Harless, T.E.G.
Date
March 1993
Material Type
Research report
Physical Description
16 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Simulation
Saw mills
Optimization
Logs
Series Number
E-1379
Location
Sainte-Foy, Québec
Language
English
Abstract
Softwood sawmill designers, engineers and managers may benefit from computer simulation analysis of proposed and existing sawmill systems. Simulation models exist that allow users to construct and execute discrete event simulations, but these have incorporated compromises or limitations that reduce the accuracy of the results, or preclude special considerations and observations. The proposed microcomputer discrete event simulation model will allow for real log shapes, explicit lumber orders, learning curves and catastophe scheduling with emergency actions and transient response analysis.
Sawmill Simulation
Small Diameter Logs - Optimization
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Le sechage a haute temperature : conditions de sechage et qualite du bois : rapport preliminaire

https://library.fpinnovations.ca/en/permalink/fpipub41573
Author
Cloutier, Alain
Date
June 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Cloutier, Alain
Date
June 1993
Material Type
Research report
Physical Description
151p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood quality
Wood
Quality control
Qualitative analysis
Drying
High temperature
Series Number
Forestry Canada No. 48
E-1395
Location
Sainte-Foy, Québec
Language
French
Abstract
High Temperature Drying
Wood quality
Documents
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Modelisation du positionnement des billes de bois au premier debitage

https://library.fpinnovations.ca/en/permalink/fpipub41575
Author
Mongeau, J.-P.
Date
March 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Date
March 1993
Material Type
Research report
Physical Description
129 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Simulation
Saw mills
Series Number
E-1397
Location
Sainte-Foy, Québec
Language
French
Abstract
Le projet visait la modelisation du positionnement des billes de bois au premier debitage. L'objectif etant de developper de nouvelles methodes de simulation du comportement des appareils et des strategies usuelles de positionnement des billes au premier debitage. Dans un premier temps, une analyse du processus de sciage et des appareils a ete effectuee en rechechant les caracteristiques essentielles a modeliser. Par la suite un ensemble d'algorithmes de nature geometrique a ete developpe de maniere a modeliser les positionneurs existants. Deux methodes de construction des algorithmes ont ete etudiees : la calcul des angles formant une suite de transformations applicables a la representation geometrique initiale des billes et la recherche d'un nouveau referentiel. Cette derniere methode fut examinee en profondeur; son implantation et les resultats generes ont permis de visualiser les effets des differents positionneurs. Les algorithmes resultant du present projet ont d'ailleurs ete integres au prototype du modele de simulation du sciage presentement en developpement au groupe Forintek-Laval.
Sawmill Simulation
Documents
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Optimisation du delignage et de l'eboutage : rapport d'etape

https://library.fpinnovations.ca/en/permalink/fpipub41588
Author
Mongeau, J.-P.
Date
June 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Date
June 1993
Material Type
Research report
Physical Description
183 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Trimming
Simulation
Saw mills
Positioning
Optimization
Logs
Algorithms
Series Number
Forestry Canada No. 46
E-1478
Location
Sainte-Foy, Québec
Language
French
Abstract
Ce projet constitue le programme d'etude de maitrise d'une etudiante (Annick Tremblay) du departement d'informatique de l'Universite Laval. Les objectifs etaient de developper un algorigthme d'optimisation des operations de delignage et d'eboutage ainsi que de proposer un algorithme effectuant le positionnement optimal des pieces a debiter. L'algorithme choisi pour le delignage et l'eboutage est fonde sur une technique d'optimisation appellee programmation dynamique. Pour sa part, l'algorithme de positionnement fait appel a une technique de subdivision d'intervalles. L'algorithme de positionnement ameliore de 76% le temps de traitement par rapport a l'algorithme de recherche exhaustive (force brute) generalement utilise.
Sawmill Simulation
Edging Optimization
Trimming Optimization
Dynamic Programming Technique
Log positioning - Simulation
Algorithms
Documents
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Modélisation du séchage du bois : rapport d'étape

https://library.fpinnovations.ca/en/permalink/fpipub41590
Author
Cloutier, Alain
Date
March 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Cloutier, Alain
Date
March 1993
Material Type
Research report
Physical Description
80 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood drying
Wood
Systems
Simulation
Drying
Kilns
Series Number
Forestry Canada No. 29
E-1486
Location
Sainte-Foy, Québec
Language
French
Abstract
Les travaux prevus pour l'annee fiscale 1993-1994 sont les suivants : 1) Inclure la possibilite de considerer des conditions de sechage variables dans le modele; 2) Inclure la modelisation du transfert de chaleur dans le bois et son couplage avec le transfert de masse; 3) Effectuer une etude de sensibilite afin d'identifier les parametres auxquels le modele est le plus sensible; 4) Determiner la relation teneur en himidite - potentiel hydrique et la conductivite hydrique effective pour l'epinette; 5) Effectuer une etude theorique des phenomenes de transfert convectifs a l'interface bois-air.
Kiln Controllers - Expert Systems
Wood Drying
Simulation
Models
Documents
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Brown stain in white pine lumber : causes and cures

https://library.fpinnovations.ca/en/permalink/fpipub4673
Author
Garrahan, Peter A.
Cane, D.A.
Date
January 1993
Edition
41472
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Cane, D.A.
Date
January 1993
Edition
41472
Material Type
Research report
Physical Description
7 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Pinus
Stain
Softwoods
Prevention
Drying
Kilns
Location
Ottawa, Ontario
Language
English
Abstract
Softwoods
White Pine
Wood - Stains and Staining - Prevention
Kiln drying
Documents
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Balsam poplar/cottonwood as a furnish material for the manufacture of oriented strandboard

https://library.fpinnovations.ca/en/permalink/fpipub2138
Author
Aston, R.
Date
July 1993
Edition
38676
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Aston, R.
Date
July 1993
Edition
38676
Material Type
Research report
Physical Description
82 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Waferboards
Strandboards
Research
Populus
OSB
Oriented strandboard
Orientation
Bibliographies
Balsam
Series Number
3843M417
E-1923
Location
Ottawa, Ontario
Language
English
Abstract
There are six species of poplar native to Canada's forests. One of the most abundant and widely used of the species is the aspen poplar (populus Tremuloides). Aspen has become the most desirable species for the production of oriented strandboard (OSB). Certain sections of Alberta and British Columbia have considerable stands of aspen. The aspen stands also contain varying amounts of balsam poplar (populus balsamifera) and black cottonwood (populus trichocarpa) and various hybrids of the three species. Forintek Canada Corp's Technical Advisory Committee (TAC) was asked by the B.C.Ministry of Forests to establish whether cottonwood could be a suitable furnish for the production of OSB, since it represented a sizeable potential resource in British Columbia. The poplar species are loosely identified by several names and to confirm the actual species we were referred to Mr.Bob Brash, District Manager, Dawson Creek Forest District. Mr.Brash confirmed that the species in question was in fact balsam poplar (populus balsamifera). Balsam poplar is also known as black poplar and balm poplar. An extensive literature search was conducted on the use of balsam poplar/cottonwood in the production of OSB. The literature review and a summary are reported here.
Balsam Poplar - Research - Bibliography
Cottonwood
Oriented strandboard - Manufacturing
OSB - Research
Waferboard
Documents
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Representation mathematique des tiges et des billes : rapport final = Softwood log shape modelling with shadow scanners

https://library.fpinnovations.ca/en/permalink/fpipub4764
Author
Mongeau, J.-P.
Date
March 1993
Edition
41574
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Date
March 1993
Edition
41574
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Softwoods
Scanning
Logs
Algorithms
Series Number
E-1396
Location
Sainte-Foy, Québec
Language
French
Abstract
This paper describes and evaluates new and existing models for exterior log geometry. Compatibility with 1,2,3, and 4-axis shadow scanners determined which models were selected for evaluation. Models were considered for potential use in sawmilling process simulation and optimization. The accuracy evaluation compared models based upon lost and added fiber percentages. All models tended to overestimate log cross section area. Popular circular and elliptical models provided the poorest accuracy. Elliptical models used with 2-axis or 3-axis scanners generated up to 8% lost fiber and up to 15% added fiber. The 3-axis dyadic and Chaikin models provided the best overall performance : lost fiber under 3.5% and added fiber under 13%. Results from the evaluation recommend a 3-axis scanner system for automatic positioning and breakdown optimization. The small benefit obtained from 4-axis models does not justify their use. Other technologies are recommended where better accuracy is needed.
Softwoods
Log Model
Scanning
Mathematical Representation
Accuracy
Documents
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Le sechage a haute temperature dans l'est du Canada : conditions de sechage utilisees et qualite du bois

https://library.fpinnovations.ca/en/permalink/fpipub41690
Author
Fabris, S.
Date
December 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Fabris, S.
Date
December 1993
Material Type
Research report
Physical Description
191 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saws
Sawing
Location
Sainte-Foy, Québec
Language
French
Abstract
Memoire
Maitre es Sciences
Universite Laval
Documents
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Modele de simulation du sciage specifications fonctionnelles du prototype : version 1.0 : rapport d'etape

https://library.fpinnovations.ca/en/permalink/fpipub41591
Author
Mongeau, J.-P.
Drouin, N.
Date
March 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mongeau, J.-P.
Drouin, N.
Date
March 1993
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Simulation
Saw mills
Prototypes
Series Number
Forestry Canada No. 47
E-1488
Location
Sainte-Foy, Québec
Language
French
Abstract
Ce rapport renferme essentiellement les specifications fonctionnelles de la version 1.0 du prototype d'un modele de simulation de la transformation des bois en bois de sciage. Une description des structures de donnees, des fonctions et des classes est fournie pour chaque module du prototype. Un listage de l'implantation accompagne egalement chaque module. A la section 2.0, le lecteur peut au depart se familiariser avec les objectifs et l'approche adoptes pour le developpement de ce prototype. A cette fin, un acte de conference et un article scientifique ont ete inseres dans le rapport.
Sawmill Simulation
Prototypes
Documents
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Modélisation des contraintes séchage du bois : revue de littérature

https://library.fpinnovations.ca/en/permalink/fpipub41620
Author
Lin, J.
Date
September 1993
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lin, J.
Date
September 1993
Material Type
Research report
Physical Description
102 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood drying
Wood
Stresses
Simulation
Drying
Bibliographies
Series Number
E-1906
Location
Sainte-Foy, Québec
Language
French
Abstract
Nous presentons ici une revue des travaux parus jusqu'a maintenant au sujet du comportement mecanique et de la modelisation des contraintes de sechage dans le bois. Notre presentation est articulee en fonction des principaux domaines - transferts de chaleur et de masse, modeles de contraintes de sechage, proprietes mecaniques du bois lors du sechage et modelisation numerique, l'accent etant mis sur les trois derniers domaines. Afin d'identifier les approches presentant le plus de potentiel pour la description mecanique et la modelisation de contraintes du sechage, notre revue est basee sur une compilation bibliographique d'environ 90 titres.
Wood Drying - Bibliography
Wood Drying - Simulation
Wood drying - Models
Wood Drying - Stresses
Documents
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Computer needs analysis : information technology management

https://library.fpinnovations.ca/en/permalink/fpipub5649
Author
Desjardins, Richard
Drouin, N.
Liberty, H.D.
Rak, G.
Stuyt, N.
Date
April 1993
Edition
38483
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Desjardins, Richard
Drouin, N.
Liberty, H.D.
Rak, G.
Stuyt, N.
Date
April 1993
Edition
38483
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Analysis
Series Number
3599A115
E-1400
Location
Ottawa, Ontario
Language
English
Abstract
Computer Networks - Benefit Analysis
Information Technology - Management
Documents
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Etude sur le sechage en sechoir de bois de dimensions predeterminees du groupe E-P-S (Juin 1987)

https://library.fpinnovations.ca/en/permalink/fpipub5650
Author
Garrahan, Peter A.
Pfaff, Frank
Morin, M.
Date
March 1993
Edition
38496
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Pfaff, Frank
Morin, M.
Date
March 1993
Edition
38496
Material Type
Research report
Physical Description
75 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Pinus
Spruce
Spruce Pine Fir
SPF
Drying
Series Number
E-1439
Location
Ottawa, Ontario
Language
French
Abstract
SPF - Drying
Spruce-Pine-Fir - Drying
Dimension lumber
Translation
Documents
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43 records – page 1 of 3.