Filter element with coating for surface filtration

US8052878B2 · kind B2 · utility

Assignee

• Herding GmbH Filtertechnik · DE

Inventors

• Stefan Hajek · Amberg, DE
• Urs Herding · Ursensollen, DE
• Kurt Palz · Crailsheim, DE
• Wolfgang Raabe · Amberg, DE
• Reiner Thuerauf · Amberg, DE
• Bernd Meindl · Hard, AT

Key dates

• Filing date: Mar 17, 2009
• Grant date: Nov 8, 2011
• Expiry date: Mar 17, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2239/0485
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for filtering out foreign particles from a cooling lubricant used in a process of machining a workpiece includes providing an inherently stable, flow-porous filter element. The filter element comprises a porous main body made of joined plastics particles and having an afflux surface and a porous coating on the afflux surface for surface filtration. The porous coating first component particles and/or fibres, second component anti-adhesion particles to mitigate the adhesion of filtered out material to the porous coating and to facilitate cleaning of the filter element, with the first component particles and/or fibres and the second component particles being mixed in the porous coating, a solidified inorganic binder, and a set adhesive. The solidified inorganic binder and the set adhesive bind the first component particles and/or fibres and the second component particles to each other and to the porous main body. The cooling lubricant is first passed through the porous coating and thereafter through the porous main body of the filter element.