woodwelding: 6fwf.ag.utk.edu/mgray/wfs512/seminarsp13/hagen.pdf · 3/13/13 1 woodwelding: 6...
TRANSCRIPT
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6 wood welding: An alterna/ve to screws and adhesives
Hagen Maraun MS Candidate University of Tennessee Department of Forestry, Wildlife and Fisheries Wednesday, 13 March 2013, 12:20 pm Room 160 PBB
• introduc.on • current knowledge • summary • future direc.ons
outline
introduction
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introduction
introduction
introduction
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introduction
… you don‘t think so… … not sure … … maybe …
introduction
I… well yeah it‘s possible…
where did the idea come from?
introduction
it is told…
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wood welding -‐ why? • a bonded joint without any chemicals • bond provided by material itself • reduced process .me • environmentally friendly
es.mated worldwide use of synthe.c glue in the wood industry; 13.3 million tons
current knowledge
history • 1993 -‐ first feasibility studies using
ultrasound • 1999 -‐ using machine induced vibra.on
and rota.on • 2001 -‐ first studies using thermoplas.c
and thermoseGng resins • 2002 -‐ first studies without adhesives • up to now -‐ further research
current knowledge
how does it work?
Pressure
current knowledge
(Pizzi et al. 2003)
(Ganne-‐Chédevill, 2008)
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how does it work?
current knowledge
(Ganne-‐Chédevill, 2008)
(Pizzi et al. 2003)
(Pizzi et al. 2003)
how does it s.ck?
lignin from in between the wood cells and from in the woodcellwall is the thermose:ng resins used
current knowledge
the bond
current knowledge
(Ganne-‐Chédevill, 2008)
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the bond
current knowledge
(Pizzi et al. 2003)
the bond
current knowledge
(Pizzi et al. 2003)
(Ganne-‐Chédevill, 2008)
(Pizzi et al. 2003)
the bond
current knowledge
(Pizzi et al. 2003)
(Pizzi et al. 2003)
(Pizzi et al. 2003)
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• simple, high strength bond • no use of adhesives (chemical, cost) • environmentally friendly • fast bonding • molecular bondlines • do-‐it-‐yourself
summary
snowboard
advanced application
• introduc.on to the market • structural applica.ons in wood-‐based civil engineering
• development of waterproof wood welding bonds
• further op.miza.on of the technology
future direction
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take home message
“I hear and I forget. I see and I remember. I do and I understand.”
(Confucius)
references Internet: • h?p://www.ahb.bB.ch/NR/rdonlyres/A0E12DA9-‐
B5F5-‐4E92-‐81FB-‐092D2ADD7505/30299/20111124_Holzkurier.pdf • h?p://ipek.hsr.ch/fileadmin/user_upload/ipek.hsr.ch/Newsroom/events/
2008/0806_Innova/onstagung/holzschweissen_ganne_chedeville.pdf • h?p://www.nordicforestresearch.org/wp-‐content/uploads/2011/03/
NV_2005_4.pdf
Papers: • Omrani, P.; Masson, E.; Pizzi, A.; Mansouri, H. R. Emission of gases and
degrada/on vola/les from polymeric wood cons/tuents in fric/on welding of wood dowels. Polymer Degrada-on and Stability 2008, 93 (4) 794–799. h?p://www.sciencedirect.com/science/ar/cle/pii/S0141391008000219.
• Pizzi, Antonio; Properzi, Milena; Leban, Jean-‐Michel; Zane:, Michela; Pichelin, Frederic. MECHANICALLY-‐INDUCED WOOD WELDING. Maderas. Ciencia y tecnología 2003
picture sources • www.conserva/onmagazine.org • www.netzpiloten.de • www.archiproducts.com • www.montage-‐service-‐direkt.de • de.dreams/me.com • www.colourbox.com • www.admonter.at • www.schwaebische.de • navfin.blogspot.com • www.zorotools.com • de.shopping.com • www.jrbriggs.com • donaldsweblog.blogspot.com
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picture sources
Thank you !!
refrences
contact: [email protected]
Questions
(Ganne-‐Chédevill, 2008)