chipbreaker for turning pvc? 1

• Nov 16, 2002

• #2

khirn

Industrial

Nov 16, 2002

2

US

if cutting on a cnc,use a canned peck cycle this will retract the tool as set by parametier. i.e. cut forward .020
retract .002. this will at least give short chips.a very high positive tool works best. good luck

 

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• Nov 17, 2002

• Thread starter
• #3

chiph

Industrial

Nov 1, 2002

32

US

khirn, thanks for the idea but, i'm embarrassed to say this job is set up on a machine so old that the Z still has a half reading dial. i concocted a hook in the top of the tool so i can at least aim the ropy swarf into a catch bucket. it's better but, the stuff gets a static charge and clings to everything. i bid on this job thinking it would be a cinch--guess i'm just an "old metal guy". thanks, chip.

 

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• Nov 18, 2002

1
• #4

TVP

Materials

Apr 12, 2002

4,592

US

You will probably get the most detailed information on machining PVC from the Technical Service Report TSR 38: Machining Geon® Vinyl, from PolyOne. You can obtain it from them using the following link:

http://www.polyone.com/tsr/index.asp

The rest of these sites offer varying degrees of information on machining PVC or other plastics. Good luck.

http://www.harvel.com/PVCCPVCshapesmachine.html

http://www.bayplastics.co.uk/product guide/DSM-guidenavbar/prod-DSM-instruct.htm

http://www.pmfmagazine.com/magazine/archives.html

http://www.signweb.com/fabrication/cont/machining0900.html

 

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• Nov 19, 2002

• Thread starter
• #5

chiph

Industrial

Nov 1, 2002

32

US

TVP,
thanks for the info. i'm on my way there.
chip

 

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• Nov 22, 2002

• #6

MattSac

Industrial

Nov 22, 2002

5

US

How about another approach - I've used a vacuum to suck the chips immediately up. A vacuum venturi (check out

http://www.anver.com

or

http://www.exair.com)and

some clear tubing works well for smaller machines.

 

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• Dec 5, 2002

• #7

DannyNC

Mechanical

Nov 26, 2001

10

CA

Hi,

I suggest to use a high positive radial rake.

http://www.iscar.com

 

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• Dec 12, 2002

• #8

lapuser

Mechanical

Dec 12, 2002

56

US

When I am machining plastics like pvc, uhmw or similar I find that I must frequently interupt the cut thereby creating short curls that do not wrap around everything. There is no chipbreaker that will work on these types of plastics that I am aware of and when you consider the nature of what you are cutting I truly doubt that such a thing is possible. A chip breaker after all does require a degree of brittleness in the chip itself to achieve the breaking of the chip.

 

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• Dec 20, 2002

• Thread starter
• #9

chiph

Industrial

Nov 1, 2002

32

US

thank you all for the great ideas. as it stands now, i've angled my tool so that the ribbon is directed into a container and it seems to work quite well as long as my aim is good and i have no interruptions[of both the mechanical and mental kind]. thanks again, chip.

 

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