Define veneer Discuss the production of veneer List the different methods of cutting veneer Identify the different types of veneer Explain the different thicknesses of veneer and what they are used for ID: 911853
Download Presentation The PPT/PDF document "Chapter 11 Veneer Objectives" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Chapter 11
Veneer
Slide2Objectives
Define veneer
Discuss the production of veneer
List the different methods of cutting veneer
Identify the different types of veneer
Explain the different thicknesses of veneer and what they are used for
Slide3Introduction
Veneer: thin slice of log or timber
Was used extensively in classic furniture of eighteenth and nineteenth centuries
Used now:
In the production of manufactured panel products
In making curved shapes
To enhance plain surfaces
Slide4Veneer Production
Best logs (select logs) that are cut are sold for veneer production
Veneer logs are debarked, cut to length, and then softened by immersion in hot water or by steaming before veneer is cut from them
Called peeler blocks
Highly decorative veneers are also cut from burl, crotch, and butt, or stump, wood
Slide5Figure 11-6
Veneer cut from burl, crotch, and stump
material is highly decorative.
Slide6Veneer Production
(
continued
)
Veneer cut from burls has a circling, wavy, knotty pattern
Veneer cut from crotch wood exhibits a highly figured V-grain, sometimes called a flame pattern
Veneer cut from the stump has a wrinkled line pattern
Slide7Veneer Production
(
continued
)
Three ways of cutting veneer
Rotary cutting, slicing, and stay-log cutting
Rotary cutting
Log is turned on a lathe and rotated against a stationary knife
Fastest method of cutting veneerProduces the greatest amount of veneer from any given logUsed to make ninety percent of all veneer
Slide8Veneer Production
(
continued
)
Slicing
Method by which most hardwood veneer is cut
Two types of slicing: flat slicing and quarter slicing
Flat slicing:
Peeler block is cut in half lengthwiseThe two halves are known as flitchesA flitch is attached to a flitch table that moves up and down against a stationary knife
Slide9Figure 11-14
Flat slicing veneer.
Slide10Veneer Production
(
continued
)
Slicing (
continued
)
Quarter slicing:
Same as flat slicing except that the log is quartered rather than halvedResults in a far different look than plain slicing produces
Slide11Veneer Production
(
continued
)
Stay-log cutting
Log may or may not be cut into flitches first
Either the log or the flitch is mounted on a lathe with an eccentric chuck and swung against the knife
Three different patterns may be produced: rift, half round, and back-cut
Slide12Figure 11-18
Stay-log rift-cut veneer cutting.
Slide13Veneer Production
(
continued
)
Stay-log cutting (
continued
)
Rift cutting:
Cutting at a 45° angle to the annual ringsLog is first quartered into four flitchesResults in a very straight-grained veneerHalf-round cutsProduce a large U-patterned grainPeeler block is halved, and cuts are made from the rounded side of the flitch
Slide14Veneer Production
(
continued
)
Stay-log cutting (
continued
)
Back cutting:
Peeler block is cut in half lengthwiseCuts are taken from the flat part of the flitchProduces grain pattern very similar to that found in flat-sliced veneer
Slide15Veneer Production
(
continued
)
After veneer is cut, it is clipped to various widths; defects are cut out
Next, veneer is dried to less than 10 percent moisture content
Once dry, it is clipped to length
Slide16Veneer Production
(
continued
)
Veneer thicknesses
1/10˝ to 3/16˝ thick: thickest veneer; used as plies in plywood
1/28˝ to 1/40˝ thick: used to enhance plain surfaces or used as face and back veneers in the production of cabinet plywood
1/40˝ to 1/100˝ thick: thinnest veneer; used to make reinforced veneers
Slide17Summary
Veneer: thin slice of wood ranging in thickness from 1/100 to 3/16 of an inch
Veneer is produced from the highest quality logs
Veneer is cut by one of three methods: rotary cutting, slicing, or stay-log cutting
Veneer is sliced in different thicknesses for different applications