I want to v-groove and profile some 0.2mm thick tinplate, to prepare for folding and soldering to a final shape.
To do this, I was planning to CA glue the material to a piece of MDF for a stable, flat surface during machining.
But how can I remove it from the glue without twisting/tearing the material?
Suggestion:
Blue painter’s tape on spoil board. Blue painter’s tape on the plate. CA glue on
one of the non-glue sides and press down. Make the tape on the spoil board larger than you need. When done, peel the tape off the spoil board. Should be somewhat easy to peel the tape off the plate.
Good luck
Good luck
I’ll try tape, but my feeling was that it wouldn’t lead to a flat surface given such thin metal.
It’s worth an experiment 
While I’m a follower from the church of Blue Tape & CA Glue, there’s a high chance of bending the (very thin) parts when removing them. Did you consider fixturing wax ? (like the one on the C3D store). Never used it myself but I hear the main use is precisely for fragile/thin items: once the machining is over, just use heat, the wax will melt and the piece will come off.
Interesting. I read “wax” while searching for information, but I didn’t make the link to how it works. Another experiment … which will cost me 4x the store price by the time it gets to Australia 
Yeah it’s probably not worth having a small pack of wax travelling across the world.
My wife does jewelry and she uses a variety of fixturing compounds to hold fragile pieces while working on them, maybe that’s something you could find locally (e.g. similar to this ? random link searching for “fixturing compound australia”)
Don’t overlap the tape which would cause high spots. Has never caused me issues.
Acetone will break the bond and clean up the residue. I wouldn’t plan on reusing the MDF many times though.
Instead of MDF, I would superglue it to a piece of 1/4" aluminum plate. After machining, use a propane torch to heat up the the plate, and off comes your tinplate.
I have cut veneer by making a mdf jig. Basically cut a piece with the center cut out just smaller than your piece of metal. Then a frame around the center hole that you will use to secure your metal rectangle down by either screwing through the outer frame or bolting it down with your spoilboard hold downs.
I was planning for the MDF to be single-use, so this is an acceptable outcome. I’m going to try a jar of acetone and just drop the part in it to soak.
If you use the same brand for the project, I’ve found painters tape and glue to be pretty consistent thickness. I’ve used it a lot and have seen it be within a few thou over a foot. That’s more than good enough for cutting out profiles in thin metal. I also have a thick plate of metal to put on the part as a weight while the glue and accelerator work.
Tin will melt at 425 f. Ca glue fails at 275 f. Adhere tin to a glass or aluminum, process with cnc the heat in toaster oven to 300f and it will release Tom
Great detail, thank you Tom.
That thin of a part be mindful of stress from the holding material.
In our shop we use a mixture of bees wax and rosin. It holds well and you can remove it at low heat.
Cleans up with acetone but we have a commercial de greaser called CitriKleen.
Way out there thought, use a magnetic chuck to hold?
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