Gluing Multiplex?

Discussion in 'Show off your homemades!' started by Hegz, Mar 25, 2013.

  1. Hegz

    Hegz New Member

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    Hi So far I have been unable to locally source 19mm thick Multiplex in any size smaller then a full 1.2 by 2.4 meter sheet. I have been able to find smaller sections in a 12mm thickness, and I'm nit sure if that is enough to take the stress. Could I glue two of those sheets together to create a 24mm thickness? if so is it as simple as just gluing, clamping and letting it dry?<br><br>Also here are my first slingshot frames. The first is a Dragon by Hrawk, and the Second is a Phoenix by Jörg. Both are build 25mm thick from a scrap piece of hardwood that I had laying around. I believe it to be either Aspen or Alder. The finish is a antique walnut tinted polyurethane that I had around from an unrelated project. I'm very happy with how they both turned out, but I am worried about putting strong bands on the phoenix as it is not made from the recommended multiplex board.<br><br><img src="http://i.imgur.com/PC5YOcI.jpg" border="0" alt=""><br><br><img src="http://i.imgur.com/3OGt8R9.jpg" border="0" alt="">
     
  2. <div>if you use a good wood glue or an epoxy then yes it I think that it will easily take the strain. I have seen many people do this in the past with mm multiplex</div><div class="clear"></div><div class="signature_div">
    <br>I love making slingshots and slingshot crossbows<br>check out my youtube channel <a href="https://www.youtube.com/user/theartofweapons/featured" class="postlink" target="_blank" rel="nofollow">here</a> for more!<br><img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7">
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  3. kineticweaponry

    kineticweaponry Senior Member

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    very nice finish on those slings, i don't recommend putting strong bands on the phoenix but the dragon will cope. as for the multiplex, i think you should buy the big board, it is so usefull to have a lot of multiplex around
     
  4. onnod

    onnod Im from Holland, isnt that weird?

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    you can, with the use of strong glue, just glue two or more boards together
     
  5. Flipgun

    Flipgun Well-Known Member

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    <div>I use wood glue from Harbor freight. Elmer's wood glue is fine. But for muliplex glueclampdry works just fine.</div><div class="clear"></div><div class="signature_div">
    <br>Failed perception is when you have a gun, I have a slingshot and you think you are the only one that is armed. <img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7">
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  6. Bert the Welder

    Bert the Welder New Member

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    Nice to see another BC'er on here! <br>For 19mm/ 3/4" plywood, Home Depo/Rona/Home Hardware/ Castle/ Do-It all carry smaller size pieces of sheet goods. Usually 4x4', 2x4', and even 2x2'. Good cabinet grade stuff is best( less/no voids) but regular G2S (Good 2 Sides) plywood will work. You may have to fill a void at the edge where you cut. Use some of the dust from cutting out and mix with wood glue or use epoxy or wood filler if it's a small gap. <br>Epoxy or regular wood glue is good. Don't use Weldbond. The wood draws the moisture out of it too quickly and weakens it. Yellow carpenters wood glue is cheap and easy. Spread an even, thin coat and clamp.
     
  7. Hegz

    Hegz New Member

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    Thanks for the tips everyone.<br><br>I'd like to get the big board, but a number of issues are preventing that for now (available transportation, cost, wife approval rating)<br><br>I checked the local home depot and the only thing that was smaller then a full sheet in birch was the 'Sureply' underlay. And at 1/4" (6.35mm) that's a lot of glueing to get it to a usable thickness.<br><br>is using birch important? or will the standard spruce/fir varieties (Lots of sizing for that stuff) work for slingshots?<br><br>The best place I've found for birch so far is Michaels. They sell sizes from about 1'x1' (30cm x 30cm ) square through to 2'x3' (60cm x 90cm) in 1/2" (12mm). but my search through local hardware stores is not yet complete. <br><br>Is there any special considerations for making the bond as tough as possible? Sand to 600grit? sand at 80 grit? glue grains at right angles? or am I way over thinking this?<br><br>Also, Bert the Welder, as a BC resident where do you source your ammo from?
     
  8. Flipgun

    Flipgun Well-Known Member

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    <div>You can get a 2'x2' sheet of lauan cheap(ish). I use it when I run out of what I find in the trash.</div><div class="clear"></div><div class="signature_div">
    <br>Failed perception is when you have a gun, I have a slingshot and you think you are the only one that is armed. <img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7">
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  9. Bert the Welder

    Bert the Welder New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Hegz wrote:</b></span></td></tr>
    <tr><td class="quote">Thanks for the tips everyone.<br><br>I'd like to get the big board, but a number of issues are preventing that for now (available transportation, cost, wife approval rating)<br><br>I checked the local home depot and the only thing that was smaller then a full sheet in birch was the 'Sureply' underlay. And at 1/4" (6.35mm) that's a lot of glueing to get it to a usable thickness.<br><br>is using birch important? or will the standard spruce/fir varieties (Lots of sizing for that stuff) work for slingshots?<br><br>The best place I've found for birch so far is Michaels. They sell sizes from about 1'x1' (30cm x 30cm ) square through to 2'x3' (60cm x 90cm) in 1/2" (12mm). but my search through local hardware stores is not yet complete. <br><br>Is there any special considerations for making the bond as tough as possible? Sand to 600grit? sand at 80 grit? glue grains at right angles? or am I way over thinking this?<br><br>Also, Bert the Welder, as a BC resident where do you source your ammo from?</td></tr>
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    <span class="postbody"><br><br>Sorry, yeah, HD usually has the reg. ply in the smaller sizes. It will be G1S or G2S. Problem is voids in the internal ply's. These can be filled. Usually the birch, oak or maple plywood sheets are better grades, but can still have voids. If you're looking for Baltic Birch Plywood ( thinner ply's and no voids ) Windsor Plywood and Sleggs Lumber carry it. The stuff at Michael's is Baltic Birch but super expensive per sq. ft. 50% off coupons you can print out online!<br><br>Gluing at right angles; sure, but probably fine either way. Sand to 100 is fine. <br><br>Ammo: Hex nuts, glass marbles ( buy in mesh bags. Ikea, Micheal's, etc.), cut pieces of steel round rod seem to be popular with some guys on here. I've got hundreds of pounds of it in my shop but no time to really try it yet <img src="http://illiweb.com/fa/i/smiles/icon_rolleyes.gif" alt="Rolling Eyes" longdesc="14"><img src="http://illiweb.com/fa/i/smiles/icon_sad.gif" alt="Sad" longdesc="3">. <br>Slegg's has the best prices on the BB plywood but I don't know if anyone sells partial sheets, so Micheal's might be your only option.</span>
     
  10. Hegz

    Hegz New Member

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    I am Kind of set on the Baltic Birch plywood, as i'd like the next build to be a hammerhead. Also, I've got some friends/family that might appreciate a slingshot as a gift, so strong materials would be best for that. <br><br>I was able to pick up some scrap 3/4" ply from the Carpenrty department at work. It's got a nice finish veneer on either side, but the 5 plys in the center seem to be some type of softwood. I'm sure I'll be able to put it to use somewhere, but maybe not as a slingshot.<br><br>I found this site based out of ontario that sells Birch plywood <a href="http://workshopsupply.com" class="postlink" target="_blank" rel="nofollow">workshopsupply.com</a>. It seems like reasonable prices/shipping. I picked up a piece of walnut and some 13 ply Birch, should make for a nice hammerhead.
     
  11. Bert the Welder

    Bert the Welder New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Hegz wrote:</b></span></td></tr>
    <tr><td class="quote">I am Kind of set on the Baltic Birch plywood, as i'd like the next build to be a hammerhead. Also, I've got some friends/family that might appreciate a slingshot as a gift, so strong materials would be best for that. <br><br>I was able to pick up some scrap 3/4" ply from the Carpenrty department at work. It's got a nice finish veneer on either side, but the 5 plys in the center seem to be some type of softwood. I'm sure I'll be able to put it to use somewhere, but maybe not as a slingshot.<br><br>I found this site based out of ontario that sells Birch plywood <a href="http://workshopsupply.com" class="postlink" target="_blank" rel="nofollow">workshopsupply.com</a>. It seems like reasonable prices/shipping. I picked up a piece of walnut and some 13 ply Birch, should make for a nice hammerhead.</td></tr>
    </table>
    <span class="postbody"><br><br>Yeah, the BB is much nicer than reg ply. That's not too bad a $ given that it's smaller pieces and you don't need to store and/or break down a full sheet. <br>You could use the 3/4 G2S you found to make a practice run with before cutting into the limited supply of BB. Make yer mistakes and rethinks with the cheap/free stuff.</span>