Perforated vacuum transport drum and method of manufacture

Details Perforated vacuum transport drum and method of manufacture Perforated vacuum transport drum and method of manufacture

1993-04-06

1996-06-04

Hoang, Tu

Electric heating

Metal heating

By arc

21912171, B23K 2600

Patent

active

055235441

ABSTRACT:
A process for perforating a urethane anti-static filled coating of a metallic drum core with clean holes of substantially uniform size and shape. The process includes placing an electrically conducting absorbing tape between the urethane coating and the metallic core to absorb the urethane melt generated by the laser cutting process. The coated core after being placed in a fixture, is subjected to a laser beam generated by a pulsed CO2 gas laser that passes through a set of rotary optics capable of spinning the beam in circles as it passes through a gas jet
ozzle assembly before beam impact with the coating. Through the use of conductive tape a good ground may be maintained between the anti-static filled coating and the metallic core to prevent static build up on the outer surface of the drum.

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