# US 8,771,565 B2 · Method for manufacturing a disc brake pad

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- Number: US 8,771,565 B2
- Document ID: US8771565B2
- Status: Granted
- Kind: B2
- Application number: 12/969,544
- Filed: 2010-12-15
- Published: 2011-06-23
- Granted: 2014-07-08
- Earliest claimed: 2009-12-18
- Assignees: Nisshinbo Brake, Inc.
- Applicants: Shinichi Toshima; Sakae Yoshihara
- Inventors: Shinichi Toshima; Sakae Yoshihara
- Web page: https://patentgrep.com/patent/US8771565B2

## CPC

- F16D 69/04: Attachment of linings
- F16D 65/092: for axially-engaging brakes, e.g. disc brakes
- F16D 69/00: Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces (clutching elements F16D13/60; braking members F16D65/02)
- F16D 2069/004: {Profiled friction surfaces, e.g. grooves, dimples}
- F16D 2069/045: {Bonding}
- F16D 2069/0483: {Lining or lining carrier material shaped in situ}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

To provide a manufacturing method for a disc brake pad using a forming die to form a final inclined surface on a friction material, where the resulted friction material is entirely uniform even if the flowability of the powdered raw friction material is insufficient. The method for manufacturing a disc brake pad includes the steps of preliminarily forming a preliminarily formed product by pressurizing without heating the powdered raw materials in a metal preliminarily forming die, and forming the final inclined surface on the friction material using a metal forming die with an inclined surface, the step of preliminarily forming including forming a temporary inclined surface, having a larger angle than the final inclined surface of the friction material, on the preliminarily formed product at an opposite side thereof to be fixed to a back plate, and forming a recess portion on the preliminarily formed product at a side thereof to be fixed to the back plate.

## Claims

### Claim 1

A method for manufacturing a disc brake pad for a disc brake of a motor vehicle, comprising the steps of:
preliminarily forming an intermediary formed product having a temporary inclined surface on an opposite side to be fixed to a back plate by pressurizing and molding powder materials with a metal preliminarily forming die with a first inclined surface; and
forming a final inclined surface, having a smaller angle than said temporary inclined surface, on a friction material by pressurizing and molding said intermediary formed product on the back plate with a metal forming die with a second inclined surface; where
a recess portion is formed on said intermediary formed product at a side to be fixed to the back plate during said step of preliminarily forming, and
said recess portion disappears during said step of forming the final inclined surface.