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  1. 8th October 2008, 11:18 AM #1
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    Default Bending Different types of timber

    Hello everyone,

    I am about to start a project in which I plan to create curver timber legs using the Lamination method. (Thin strips glued together; clamped in a jig)

    My questions are as follows.

    i) Can I use two different types of timber eg. light timber,dark timber,light timber etc, to create an unusual look, and if so are there certain types of timbers I should use for this to work.

    and

    ii) Can I safely use normal AV180, or is there a special glue I should use to be sure it doesn't de-laminate. ( I vaguely remember using urea formaldehyde glue for something not too dissimilar in 1st year)


    Thanks Guys any help is greatly appreciated!!
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  3. 10th October 2008, 12:53 AM #2
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    I don't see you having any problems with the av180, just get it on fast, and not at too cold a temp. I would recommend Wests System as my favorite tho. The timbers will ideally though not critical,be cut with a similar grain orientation, and be of similar hardness etc.
    everything is something, for a reason:confused:
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  4. 10th October 2008, 10:28 AM #3
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    I've never used AV180 for laminating, there is a cross-linked PVA from AV syntec (AV206 or 260?) that works well. Or do as Rowie says, use epoxy such as West system or Techniglue.
    Should have no problems using 2 different timbers.
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  5. 10th October 2008, 11:11 AM #4
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    Default

    You can even sneak a length of fibre glass or carbon fibre tape between the laminations if you need extra strength or stiffness.

    Cheers

    Graeme
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  6. 10th October 2008, 03:45 PM #5
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    Quote Originally Posted by rowie View Post
    I don't see you having any problems with the av180, just get it on fast, and not at too cold a temp. I would recommend Wests System as my favorite tho. The timbers will ideally though not critical,be cut with a similar grain orientation, and be of similar hardness etc.
    Great! I was thinking I might be able to get away with timbers that are similar in hardness, but just not sure if there was something I hadn't thought of.

    Thanks for your reply mate!
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  7. 10th October 2008, 06:22 PM #6
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    Quote Originally Posted by AlexS View Post
    I've never used AV180 for laminating, there is a cross-linked PVA from AV syntec (AV206 or 260?) that works well. Or do as Rowie says, use epoxy such as West system or Techniglue.
    Should have no problems using 2 different timbers.
    I thought the 180 was a CLPVA I used it a few times about 12 years ago, but had a problem with some lammied maple legs that opened up so started using 2 part epoxy for that purpose, it also being a very good gapfiller.
    I find the epoxy is also a lot easier to remove when dry.
    everything is something, for a reason:confused:
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  8. 10th October 2008, 06:59 PM #7
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    Quote Originally Posted by Eldanos of KDM View Post
    Great! I was thinking I might be able to get away with timbers that are similar in hardness, but just not sure if there was something I hadn't thought of.

    Thanks for your reply mate!
    No worries mate, you were left on your pat malone for a while so thought I better try to help out.
    Similar hardness/density will help when sanding & finishing.
    A similar grain orientation & direction of the mating pieces as well as similar mechanical properties of the timbers will help reduce any delamination that can/may occur throughout its lifetime.
    everything is something, for a reason:confused:
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