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Edgebander not giving good results - only on particle core...1/29/20
I have a lower end edgebander, which I asked some questions about on here a month or so ago. Thank you for all of the answers, they were very helpful.
I have been banding veneer core and MDF sheets since then with no problems, good performance from the bander. Doing a pull test, I pretty much have to wrap the banding around my hand to get it to pull off.
I have my first particle core job coming up (since getting the bander), and did some tests. I am not getting what I would call great results. Sure, it adheres, but once I get something dug under one end (a fingernail or screwdriver), I can pull it off fairly easily.
Any suggestions? I am using the same table saw to cut the PC sheets as the VC/MDF sheets. Brand new, good quality melamine blade. The bander is set to the same temp...
The bander has a glue flow control, to control how much goes on the band. Should I turn it up? I am reluctant to turn it up too much, lest I just end up making a giant mess.
Is this just the quality of adhesion I should expect with PC sheets on a cheaper edgebander?
Any help would be greatly appreciated,
I would increase your glue flow until your bander begins to stop being able to clean it up then back it down a hair. PB core, depending on the brand/quality, can be very porous. The bulk of your glue is likely getting lost in the pores.
You may well be under-gluing the other material as well if you can pull it off by hand (even with the wrapping). We cant pull banding off period when it comes out of the machine. Your only hope is to skin it off with a very sharp chisel or to use heat.
Maybe I've been doing this wrong... how long should I be waiting to do the pull test?
I just read a Knowledge Base article from years ago (someone having similar issues), where someone talked about waiting before doing the pull test.
Another KB article referred to panel temps... what sort of temperature should I be keeping the panels at? The temperature in the shop is around 12-15c. I have tried turning the gluepot all the way up to the upper limit of the glue specs. It just results in the glue ending up stringy...
Have a look at the edge banding after you pull it off. How much wood fibre is stuck in the glue? Is the banding completely covered with a thin and consistent glue film?
For me personally I wouldn't be so concerned with glue temp as I would quantity. I will try again tomorrow but I honestly cant strip PVC or wood banding off by hand. It tears off in long shards. I couldn't re band a piece without taking it to the bench as shearing the banding off with a sharp chisel and even that's a chore.
Do you have a heater on the fence of your edgebander or a heat lamp prior to or just after the glue roller? The temperature in your shop is borderline and the glue may be cooling down too much before the panel reaches the first pressure roller. This will cause poor adhesion. If the glue is very smooth on the board and you don't see the knurl marks of the roller when you pull the edgebanding off then the glue is cooling too quickly before it reaches the first pressure roller.