Im quoting on a 24" shear die for high speed cutting plastic labels minimum .004" thick. Im thinking of trying to maintain a clearance of .0005" or less over a length of 24". Im trying to avoid the blades from touching one another. Anyone here had experience designing & building one of these? Input appreciated. thanx jerry
How many layers at a time? How fast? Why no-touch?
Is this a rotary die or literally a shear?
Nick
just a regular guillotine die nick
Well, not too fast or too much to cut. I just can't see you maintaining the clearance and getting a good cut. How about making the blades cheap enough to negate wear or TiN coat them.
If you can, you might want to think about a rotary shear. Last time I purchased them rotary knife blades were remarkably cheap, if you pick something that's intended for common machinery. I believe 3" or 4" diameter blades made from D2, ground with a special edge profile, were less than $20 each.
Ned Simmons
Buy a set of Kuttrimmer blades. They are wicked sharp and about a hundred bucks. Kinda like a paper cutter on steroids. I have cut hundreds of thousands of labels and overlays with accuracies to .003" in plastics and foils up .020" thickness.
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