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Powder Coating parts with Press Brake tool marks w/out Buffing

2005

Hi experts:

I am just helping out of my metal supplier by reducing their processing. I have seen them 100% buffing out tool marks resulting from CNC Press Brake operation. Parts are soft tooled and requires CNC press brake for some bending operations. However, before powder coating, they are 100% buffing these tool marks. I ask the operators why they are doing that and they replied that the tool marks will be visible after the parts were powder coated. I cannot verify this since they are all buffing the items. But if this is true, is there a way how to eliminate the buffing of tool marks? Or how can the tool marks be NOT visible without buffing once the items have been powder coated.

ACRONYMS:

CNC= Computer Numerical Control

Newton
- Philippines

2005

Hi Newton,
In my experience the only method I have found of reducing press brake tool marks is to use teflon sheeting in the forming operation.
This sheet is placed in the V tool and will significantly reduce the tooling marks.
It is generally about 50 microns thick and can be used repeatedly on forming operations.

Bill Taylor
- Birr, Co. Offaly, Eire

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