looking at getting some very thin birch plywood and bending a layer
and then gluing a layer to that perhaps repeating for a few or more
layers
the missing info is will that bend remain and not break or lose the
original form
think of a u shaped head band or hair band
my concern is the glue will not remain flexible but maybe it does not
need to
ultimately i will have to experiment but if you have tried this how
were the results
On Wednesday, December 7, 2016 at 12:07:09 PM UTC-5, Electric Comet wrote:
> looking at getting some very thin birch plywood and bending a layer
> and then gluing a layer to that perhaps repeating for a few or more
> layers
>=20
> the missing info is will that bend remain and not break or lose the
> original form
>=20
> think of a u shaped head band or hair band
>=20
>=20
> my concern is the glue will not remain flexible but maybe it does not
> need to
>=20
>=20
> ultimately i will have to experiment but if you have tried this how
> were the results
Spend some time reviewing boat building sites. Very common there, have done=
it myself, eg a laminated stem for a 22' pulling boat I am in the process =
of building. For approaching or surpassing 90 degrees, I have pre-bent the =
laminations in hot water before final gluing (actually thickened epoxy) hop=
ing to minimize the possibility of failure...The sharper the angle, the thi=
nner, and more plentiful, the laminations...try it and see how it goes...se=
ems to me you believe in prototypes, here's a situation where it makes perf=
ect sense...
Electric Comet <[email protected]> wrote in news:o29fh8$ttj$5
@dont-email.me:
>
> looking at getting some very thin birch plywood and bending a layer
> and then gluing a layer to that perhaps repeating for a few or more
> layers
>
> the missing info is will that bend remain and not break or lose the
> original form
As bnwelch said, this is common thing in boatbuilding. You
can find sites which will include tables to tell you how
thin you need to cut your wood for different radius curves,
and how much springback (the amount of curve you lose when
you take the clamps off) you can expect.
BTW this will work better if you use solid wood rather than
plywood. Plywood really doesn't care for bending.
John
On 12/7/2016 11:17 AM, Scott Lurndal wrote:
> Electric Comet <[email protected]> writes:
>>
>> looking at getting some very thin birch plywood and bending a layer
>> and then gluing a layer to that perhaps repeating for a few or more
>> layers
>
> A google search for "Bent Laminations" will answer all
> the questions that you've asked.
To OP: Two layers of 3/4' birch plywood, curved and laminated. Photos
should be self-explanatory:
https://goo.gl/photos/xrooS5JqASyPrFMx7
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Electric Comet <[email protected]> writes:
>
>looking at getting some very thin birch plywood and bending a layer
>and then gluing a layer to that perhaps repeating for a few or more
>layers
A google search for "Bent Laminations" will answer all
the questions that you've asked.