An investigation into chipped surface quality problems at canter lines

https://library.fpinnovations.ca/en/permalink/fpipub5565
Author
Wang, A.
Szathmary, G.
Date
September 2001
Edition
37595
Material Type
Research report
Field
Wood Manufacturing & Digitalization
the heads Clean-up sawing for top boards Yes Yes No Yes No Species SPF and Fir/L SPF and Fir/L
Author
Wang, A.
Szathmary, G.
Date
September 2001
Edition
37595
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Studs
Saw mills
Equipment
Sawing
Quality control
Qualitative analysis
Series Number
2166
W-1807
Location
Vancouver, British Columbia
Language
English
Abstract
The purpose of this study is to investigate and record the principal problems associated with chipped surface quality at canter lines and evaluate degrade and value losses due to these problems. Mill measurements were conducted in five member sawmills in British Columbia to evaluate the value losses and lumber degrades due to chipped surface defects. The test lumber was sampled from the planing mills to identify the chipping losses and main problems. The five types of chipped surface defects influencing lumber grade are: knot tear-out; failure to remove chipped spline channel; torn grain without knots; scalloping; and chipped thin end. Average value losses for all mills were $11.4/MBF and $12.6/MBF in freezing and non-freezing conditions respectively. Removing the non-freezing data from one mill changed this to $11.4/MBF and $9.0/MBF respectively. Knot tear out caused 60% of lumber to be degraded. On average, over 55% of knots had tear-out. 42.3% of trim length was caused by failure to remove chipped spline channel.
Sawing - Quality control
Defects - Knots
Sawmilling studies
Sawmills - Equipment
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The effect of increasing bandmill speed on vibration and cutting accuracy. Part 1. Laboratory experiments. (Final report).

https://library.fpinnovations.ca/en/permalink/fpipub37351
Author
Taylor, J.
White, J.
Date
February 1994
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Taylor, J.
White, J.
Contributor
Science Council of British Columbia.
Date
February 1994
Material Type
Research report
Physical Description
66 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Band saws
Saw bands
Saws
Bands
Saw mills
Equipment
Sawing
Series Number
W-1134
Location
Vancouver, British Columbia
Language
English
Abstract
This paper investigates the feasibility of increasing bandmill production by proportionally increasing both blade speed and lumber feed speed. A modal analysis of the bandmill and bandsaw was conducted and resonant conditions, likely to impair performance, were identified. Cutting tests were conducted to determine the effect of increased blade speed on cutting accuracy, surface finish and sawdust quality. The tests were conducted at blade speeds of 10,000 fpm, 12,500 fpm and 15,000 fpm and examined the effect of tipped and swaged blades cutting Coastal Hem/Fir and Interior SPF.
Saws - Band
Sawmills - Equipment
Sawing - Cutting speeds
Documents
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The effect of increasing bandmill speed on vibration and cutting accuracy. Part 2. Mill trials. (Final Report)

https://library.fpinnovations.ca/en/permalink/fpipub37376
Author
Taylor, J.
White, J.
Date
March 1995
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Taylor, J.
White, J.
Contributor
Science Council of British Columbia.
Date
March 1995
Material Type
Research report
Physical Description
37 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Band saws
Saw bands
Saws
Bands
Saw mills
Equipment
Sawing
Series Number
W-1200
Location
Vancouver, British Columbia
Language
English
Abstract
The global objective of the project is to investigate the feasibility of increasing bandmill production by proportionately increasing both the blade speed and the lumber feed speed. The objective of this phase of the project is to transfer the results of the laboratory experiments to the sawmill industry. The work described in this report covers the transfer of the technology to two sawmills. The first report has a more detailed introduction to the project and a review of the literature.
Saws - Band
Sawmills - Equipment
Sawing - Cutting speeds
Documents
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Processing options for small diameter hardwood logs

https://library.fpinnovations.ca/en/permalink/fpipub38039
Author
Capstick, D.E.
Date
March 1985
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Capstick, D.E.
Date
March 1985
Material Type
Research report
Physical Description
56 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Utilization
Small logs
Saw mills
Equipment
Sawing
Logs
Series Number
CFS/DSS project no 36/84-85
40-12-201
E-116
Location
Ottawa, Ontario
Language
English
Abstract
Sawmills - Equipment and Supplies
Small Logs - Utilization
Sawing - Small logs
Documents
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