DRY FRICTION MATERIAL AND METHOD FOR MANUFACTURING SAME

Title:

DRY FRICTION MATERIAL AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2012/014535

Kind Code:

A1

Abstract:

The present invention provides a dry friction material and a method for manufacturing the same, wherein the dry friction material is maintained as a whole with a reduced percentage of glass fiber content so that a portion to be drilled has a high strength and a high rigidity, thereby enabling drilling for swaging. The portion of stamping dies (20A, 20B) that is associated with the portion to be drilled is provided with a rib (21) protruded toward the workpiece being shaped, thereby stamping in a press forming step the portion to be drilled (a glass rich portion (30)) at a higher pressure as compared with a portion not to be drilled. This causes only compound rubber (4) to be extruded outward, so that only the glass rich portion (30) has an increased percentage of glass fiber (3) content, thus being provided with enough strength to withstand the drilling. It is thus possible to manufacture the dry friction material (1) that is provided with a drilled hole (2) without causing any defectives due to the drilling.

Inventors:

IWAMA KIYOSHI (JP)
ONO HIDEO (JP)
MORITA KAZUYA (JP)

Application Number:

PCT/JP2011/059333

Publication Date:

February 02, 2012

Filing Date:

April 15, 2011

Export Citation:

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Assignee:

AISHIN KAKO KK (JP)
IWAMA KIYOSHI (JP)
ONO HIDEO (JP)
MORITA KAZUYA (JP)

International Classes:

F16D69/00; C09K3/14; F16D13/62

Foreign References:

JPH04131522A	1992-05-06
JP2003083374A	2003-03-19
JP2004182911A	2004-07-02
JP2005249032A	2005-09-15
JP2009534590A	2009-09-24
JP2000037797A	2000-02-08

Other References: