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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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» fix bolts
by lyonsmayne Yesterday at 7:52 pm

» Collotiere a Charavines crossbow
by stuckinthemud1 Thu Nov 19, 2020 1:00 pm

» New Build for 2020
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» how to Build a non Chinese repeating crossbow?
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» Fascinating reconstruction
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» Cutting delrin straight by hand?
by drawknife Sun Sep 20, 2020 8:09 am

» Anyone make their own bolts?
by sydney1942 Wed Sep 02, 2020 3:03 pm

» Cocking via moving the bow.
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» Claw crossbow prototype
by Phil Abrahams Fri Aug 28, 2020 9:20 am

» Stirrups, how heavy? Design help needed
by stuckinthemud1 Tue Aug 18, 2020 2:24 pm

» ash lath and pin-lock crossbow
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» Finish on lashings
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» Look what the smith sent
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» Covid 19 and crossbow builders
by kenh Thu Jul 30, 2020 10:22 am

» Crossbow accuracy
by Geezer Thu Jul 30, 2020 7:51 am

» How do you feel about miniature crossbows?
by El Zurdo Wed Jul 29, 2020 7:21 am

» Just finished my windlass crossbow!
by Dennis Greenaway Tue Jul 28, 2020 4:01 pm

» Sinew backed crossbow prod tillering. Update and questions.
by stuckinthemud1 Tue Jul 28, 2020 2:43 am

» snakeskin not birch bark on composite bows in medieval period
by Cornerstone Mon Jul 27, 2020 3:50 pm

» two axle mechanism makers/accurate plans?
by stuckinthemud1 Wed Jul 22, 2020 10:34 am

» Stonebow Buildalong
by banuvatt Thu Jun 25, 2020 9:00 pm

» How to Attach a PVC Prod to a Stock?
by banuvatt Tue Jun 02, 2020 8:22 am

» finally started my first composite bow
by stuckinthemud1 Fri May 29, 2020 12:40 am

» AMAZING MINI CROSSBOW code name KillCovid-19
by El Zurdo Thu May 21, 2020 3:14 am

» Draw length ash lath
by banuvatt Thu Apr 23, 2020 9:47 am


    Laminating crossbow limbs

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    Hermit
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    Post by Hermit on Sat Sep 21, 2013 11:09 pm

    There are 2 types of resins available for use in fibreglass moulding.One is polyester.This resin is readily available,and fairly cheap.I think it is commonly used in crossbow prods and limbs,and seems to work well in solid form.The other is marine epoxy,the best known being West system epoxy.The reason that marine epoxy is different,is because polyester resin tends to 'float' on top of wood,and not soak in a fibreglass sheathed wooden hull can 'deglove',and the fibreglass come away from the hull.Marine epoxy soaks into the wood and bonds to it much better.With regard to laminated wood and fibreglass crossbow limbs,it seems to me that marine epoxy would do a better job.Marine epoxy does have one fault that polyester resin does'nt,it needs to be painted or varnished,as the U.V. rays in sunlight will cause it to break down.Marine epoxy is more expensive than polyester.
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    Post by kenh on Sun Sep 22, 2013 9:29 am

    Good analysis of epoxies there, Hermit.  Since I live on a boat at a marina, access to marine epoxy is relatively easy and inexpensive for me -- my friends wouldn't mind me 'borrowing' a brushload or two while they're deeply involved in 'glassing a deck with a gallon of epoxy.

    Strangely enough, I'd say the vast majority of crossbow builders don't make wood-glass laminates although it should be an easy setup to make a simple slightly recurved molds for a couple different sizes out of a piece of 2x4.
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    Post by actionbow on Sat Oct 12, 2013 1:21 pm

    Ea-40 smooth-on is the best bow glue I have found. I have used marine epoxy, standard fiberglass epoxy and a few others.
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    Post by fester on Mon Oct 28, 2019 2:15 pm

    What about the type and thickness of the glass sheets used to laminate the core ? Ive seen some 1mm stuff on eBay would that be ok?
    Also what about the core? Could an old bed lath be tillered down, deflexed and laminated to form a prod with a similar profile to a steel prod?
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    Post by banuvatt on Mon Oct 28, 2019 4:33 pm

    G flex epoxy I heard was good, it's waterproof I have seen a guy on Youtube make laminated bows out of them. But the backing on the bows I seen him make the laminates out of typically fiberglass cloth or bamboo. Also the guy says he travels alot so he used it to make his bows. It can handle changes in moisture if that's what you are worried about also.

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