Machining polypropylene with 20 - 4
Machining polypropylene with 20 - 4
(OP)
Machining polypropylene with 20 - 40% calcium carbonate in it?
I would appreciate any information. Tradenames of material, feeds and speeds, etc.
Thanks,
Tom
I would appreciate any information. Tradenames of material, feeds and speeds, etc.
Thanks,
Tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.






RE: Machining polypropylene with 20 - 4
HSS may be a better choice than carbide.
Lots of positive rake, lots of clearance, and a polished, razor sharp edge.
Minimum depth of cut ~.005" or a bit more. You can't shave just a little.
Low-ish speeds.
Refrigeration of the workpiece and/or a stream of cold air on the tool may help.
With CaCO3, you might need to sharpen the edge more often.
Mike Halloran
Pembroke Pines, FL, USA
RE: Machining polypropylene with 20 - 4
We thought about steel but it for a manufacturing plant and we are afraid steel will wear too fast.
We are going with a sub micron grade which will take a very good edge.
Narrow plate and relatively wide side clearance to suck air through.
Maybe an ATAF (altenate top / alternate face) to minimize contact between tip and material.
Also we need to maintain a sharp edge and the top, decorative layer is fibrous and comes off in strings.
Tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.