I already have an electric glue pot (HoldHeet) for heating my glue and an electric kettle with a glass jar for backup but for the school I want to be able to show as many options as I can so …..... I started cruising eBay last winter and was fortunate enough to win an auction for a fine old traditional cast iron glue pot for the princely sum of $17.
The problem arose when I tried it out on the hotplate I use for my sand shading. Even at the lowest setting, the glue would reach in excess of 170 F which is too hot and on the verge of burning it.
After rolling the problem around in my head for a while I came up with the following solution. It has a couple of quirks but also a few unforeseen pluses.
First of all, and the feature that attracted me most right off the top is the cost. With the advent of the coffee pod these things are available very cheaply at any second hand store. Most of you probably have one in the basement that was replaced when it’s carafe broke…... right? I didn’t so I had to pay $5 for this one.
The second plus is that it holds a temperature in the pot of …... 140 F!
The third plus (and I never thought of this until I was messing with it) is that you can put cold water in the tank and it will fill your outer glue pot with 200 degree water in a couple of minutes. Then you add the inner pot with the glue in it and it takes over and holds a perfect 140 F.
Now the quirks,
1) The heating element times out after two hours. I’m sure I can bypass that but if you turn it off and back on now and then it works just fine.
2) These machines have a raised ring around the heating plate that is smaller than the bottom of this glue pot. It is there to keep the carafe in place but in my use it prevents the pot from touching the heating plate and that just doesn’t work at all.
The element heats to about 200 F…..
... but even after I added a 1/4” aluminium disc to make contact with the pot, all I could get was about 125 degrees.
Then I noticed that it was a little tippy and I could rock it a bit on its bottom. That was the last piece in the puzzle. I hit the bottom of the cast iron pot with the belt sander until it was flat and everything fell into place. It now perks along at almost exactly 140 with the water in the big pot at about 170.
I was considering cutting the top part away for better access but I kind of like the water heating feature and after using it all afternoon today, I find it isn’t hard to get the brush in and out as-is so for now it will stay intact.
Total cost ...
Glue pot. $17
Coffee maker. $ 5
Aluminium scrap. $5
Not a bad deal as it is considerably more temperature stable than my kettle/jar model.
Thanks for looking in.
-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees. http://thecanadianschooloffrenchmarquetry.com/