Method for producing a spinning nozzle plate

US4705605A · kind A · utility

Assignee

• Kernforschungszentrum Karlsruhe GmbH · DE

Inventors

• Erwin Becker · Karlsruhe, DE
• Wolfgang Ehrfeld · Karlsruhe, DE
• Peter Hagmann · Erlenbach a.Main, DE

Key dates

• Filing date: May 16, 1986
• Grant date: Nov 10, 1987
• Expiry date: May 16, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23P15/16
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A spinning nozzle plate having nozzle capillaries is produced by depositing a layer 11 of a material whose characteristics can be changed by high-energy radiation (resist material) on a galvanic electrode 12. After resist layer 11 is irradiated in a predetermined pattern and after resist material is selectively removed by a treatment which utilizes the different material characteristics resulting from the irradiation, columns of resist material remain on galvanic electrode 12 to serve as negatives 21 of the nozzle capillaries. A galvanic layer 31 which encloses the negatives 21 of the nozzle capillaries is then produced on the galvanic electrode 12. Then the galvanic layer 31 is levelled and the negatives 21 are removed, as is the galvanic electrode 12. The process is particularly useful for producing spinning nozzle plates having nozzle capillaries with profiles of a special shape, essentially if the cross-sectional dimensions of the nozzle capillaries are small.