Blasting machine for scribing

摘要

To provide a scribing method by blasting that allows forming a groove at high accuracy without masking, a blasting machine that includes an ejection nozzle having a slit-shaped ejection opening with a width of 10 to 500 μm and a length of 5 to 5000 times the width, and an abrasive with a median diameter equal to or less than one-half of a width of the ejection opening of the ejection nozzle and with a maximum particle diameter smaller than a width of the ejection opening are used; and the abrasive is ejected together with compressed gas on a surface of a workpiece at an ejection distance of 0.1 to 3.0 mm and an ejection pressure of 0.2 MPa to 0.6 MPa without masking so that 0.25 cm3 or less of the abrasive is included per 1000 cm3 of the compressed gas discharged from the ejection nozzle.

主权项

1. A blasting machine, comprising:
an ejection nozzle having a slit-shaped ejection opening with a width of 10 μm to 500 μm and a length of 5 to 5000 times the width; and an apparatus for supplying a constant quantity of an abrasive, the apparatus quantitatively supplying the abrasive equal to or less than 0.25 cm3 relative to compressed discharge gas amount 1000 cm3 in a range of ejection pressure of 0.2 MPa to 0.6 MPa whereby being mixed the discharge gas and the abrasive as a compressed mixed fluid; and the ejection nozzle ejecting the compressed mixed fluid of the compressed gas and the abrasive.