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Doesn't look like much, but has far-reaching consequences

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Project by Karson posted 1203 days ago 3169 views 1 time favorited 29 comments Add to Favorites Watch
Doesn't look like much, but has far-reaching consequences
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I was Dover Window and Door today, they are a giver of wood for our toy making that the Mason Dixon Woodworkers undertake for underprivileged children for Christmas.

I was talking to the man who glues up the doors and windows and he was showing me the machine that they use to cure the glue joint. It’s a hydraulic press that presses the sides and ends to make sure the item is square. He then cleans up all of the squeeze out glue with a paint brush and water and he then presses a wand over the joint for 10 seconds. It cures the glue in the joint using heat and electric waves.

He then takes it out of the press (after less than 10 minutes and places it on the table and hits the other side of the joint while it’s on the table. Window finished gluing up and glue cured. This is a white PVA glue.

He said that he has also used an electric soldering gun to heat up a joint at home and he also suggested a heat gun to heat the wood to cure.

So I came home to experiment.

I took two craft sticks (Popsicle sticks), put glue on 2” and overlaped the ends. After 30 seconds it came apart easily. I then carried it into the house. wrapped one piece of masking tape over the joint. (There was a slight bow that kept it from having full contact).

I put it in my wife’s microwave for 10 seconds. I took it out, the wood was warm the tape pealed off easily and I tried to rotate one of the pieces of wood and they started to come apart. So I stopped.

I took another two sticks, put on my 2” of glue, wrapped it with one wrap of tape and microwaved it for 20 seconds. Unwrapped the tape and tried to rotate one of the pieces. You can see in the picture that the wood broke. That was after 20 seconds.

I then came back to my computer and picked up the sample that I had microwaved for 10 seconds and it was now fully cured and would not come apart. that was after 10 seconds of microwave and about 3 minutes of cooling down and curing.

So if you need to do some gluing on pieces that you can’t clamp, Use some tape to hold them together and hit them with a microwave.

My microwave might be about 1000 watts. Small cheap microwaves might be 300 watts or so, so do your own testing as to how much it might take to get it cured.

Good luck.

I know I’ll use this sometime in the future.

Revision #1 after 15 minutes of posting.

I picked up the piece that had been microwaqved for 10 seconds and twisted it again. It started to delaminate where it originally seperated. This might have been that the glue was semi cured and when I left them the glue didn’t rebond. It cured and was seperate. I could put my fingernail in the crack and I was able to seperate the two pieces. So they were cured but not fully set up as strong as a bond that was glued and clamped.

I then took the piece that was microwaved for 20 seconds. I got a knife blade at the glue joint and was able to pry them apart with the exception of one small piece where the wood came apart.

So test #3 is now underway. I microwaved for 20 seconds and I’m going to let it cure for an hour or so. The glue squeeze-out is soft after the 20 seconds. Kind of like a 2 -3 hour timeframe. It’s not like an over-night dry time. Even on the sticks that I pried apart the glue was still soft to the fingernail. That might be why it has failed. The semi cured glue is holding it inplace but it’s not fully cured.

These pieces don’t move so I’d have no problem with doing additional assembly if this was a part of a larger project.

I’ll update with the results of further testing.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †





29 comments so far

View Dan'um Style's profile

Dan'um Style

12851 posts in 2583 days


#1 posted 1203 days ago

good idea Karson … sounds handy

-- keeping myself entertained ... Humor and fun lubricate the brain

View Tim Pursell's profile

Tim Pursell

494 posts in 2383 days


#2 posted 1203 days ago

I’ll have to give this a shot, I’m working on some small boxes that will fit in the microwave.
Got to make sure the wife is out of the house first, though.. :-)

Thanks!

-- http://www.etsy.com/shop/tpursell?ref=si_shop

View grizzman's profile

grizzman

6796 posts in 1904 days


#3 posted 1203 days ago

well karson, this almost sounds as much fun as alaskan jims no brainer video of the sharpening 3000 trainer video..im wondering if our older wood workers have been sniffing to much glue and need a vacation out in some exotic location…LOL.,,,,,well i shall try this experiment and see if maybe gluing some pop corn will work ..instead of one kernel at a time…a guy could get a chain of them and just swallow..might be onto something here…ok…forgive me of my levity…sounds like some good science to me…bravo…grizz

-- GRIZZMAN ...[''''']

View Karson's profile

Karson

34858 posts in 3001 days


#4 posted 1203 days ago

I started down this trail, because I’m going to hold a Palm Box workshop for our woodworking club and I didn’t want it to be a three day affair. I wanted to do some gluing and get it to cure so addition assembly could be done.

After I finish this trial, I go to the Palm Box trial and see how it goes and holds up to prying and sanding.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †

View lew's profile

lew

9949 posts in 2356 days


#5 posted 1203 days ago

Do you think Mimi will mind if I start curing my rolling pins in her new microwave?!?

Maybe I need to spend a Saturday on the yard sale circuit.

Thanks for the information, Karson.

Lew

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Karson's profile

Karson

34858 posts in 3001 days


#6 posted 1203 days ago

Lew what happened to her old microwave. Lime green color doesn’t effect the performance.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †

View Karson's profile

Karson

34858 posts in 3001 days


#7 posted 1203 days ago

By the way, my wife was watching me, saying, “What are you doing?”

So I told her. She seamed interested and didn’t yell. But, that might not be representative of all of the species.

I do have a relatively new microwave in my shop “Still in the box. Too complicated to user!” so further realtime production runs will probable move to the shop.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †

View Sawdust2's profile

Sawdust2

1467 posts in 2688 days


#8 posted 1202 days ago

Your wife is used to you. Not strange, just different.
Lee

-- No piece is cut too short. It was meant for a smaller project.

View Dennisgrosen's profile

Dennisgrosen

10850 posts in 1716 days


#9 posted 1202 days ago

thank´s Karson for sharing this
its deffently sound like a interressting idea if you are in a hurry one day

I look forward to the updates :-)

take care
Dennis

View TopamaxSurvivor's profile

TopamaxSurvivor

14604 posts in 2276 days


#10 posted 1202 days ago

The door guy is most likely using a radiant heater. He wouldn’t have a microwave wand in his hand. If you don’t have a heat gun, might try a hair dryer?????

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View jack1's profile

jack1

1907 posts in 2628 days


#11 posted 1202 days ago

Good idea. I’ve use a hair dryer with some success.

-- jack -- ...measure once, curse twice!

View Karson's profile

Karson

34858 posts in 3001 days


#12 posted 1202 days ago

Topamax: I didn’t ask but it might be something like this.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †

View TopamaxSurvivor's profile

TopamaxSurvivor

14604 posts in 2276 days


#13 posted 1202 days ago

Probably is. I wonder what microwaves do to wood so that the manufacturer’s don’t use it? Know of any research along those lines?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Mike Gager's profile

Mike Gager

615 posts in 1868 days


#14 posted 1202 days ago

very interesting. might have to do some experimenting with this

View Joe Lyddon's profile

Joe Lyddon

7622 posts in 2653 days


#15 posted 1202 days ago

... for a minute there… I thought it was going to have something to do about “saying AH”... :) :)

Very good investigative work…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

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