Method for manufacturing cutting blade, and cutting blade

Patent metadata

Field	Value
Publication number	US-11458594-B2
Application number	US-201916719646-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 21, 2015
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

This method for manufacturing a cutting blade includes: a mixing step of adding a liquid dispersion medium to a mixed powder containing a resin powder of a thermocompression-bondable resin, abrasive grains and fibrous fillers; a compression step of cold pressing, in a forming die, the mixed powder to which the dispersion medium has been added to form an original plate of a blade main body; and a sintering step of hot pressing and sintering the original plate.

First claim

The invention claimed is:

1. A method for manufacturing a cutting blade, the method comprising:
a mixing step of adding a liquid dispersion medium to a mixed powder containing a resin powder of a thermocompression-bondable resin, abrasive grains and fibrous fillers;
a compression step of cold pressing a mixture of the liquid dispersion medium and the mixed powder in a forming die to form an original plate of a blade main body; and
a sintering step of hot pressing and sintering the original plate,
wherein the manufactured cutting blade comprises:
a blade main body having a disc shape; and
a cutting edge formed on an outer peripheral edge portion of the blade main body,
wherein the blade main body comprises:
a resin phase formed of a thermocompression-bondable resin; and
abrasive grains and fibrous fillers dispersed in the resin phase,

wherein, when the blade main body is divided into a plurality of regions at a mutually equal angle around a central axis of the blade main body, a content rate of the fibrous fillers measured in each region is from 90 to 110% with respect to an overall content rate of the fibrous fillers in the blade main body as a whole,
wherein the fibrous fillers are not oriented in a certain direction and randomly oriented in a plane substantially perpendicular to the central axis of the blade main body, and
wherein a liquid having a kinematic viscosity of 2.3 mm 2 /s or less is used as the liquid dispersion medium.

2. The method for manufacturing a cutting blade according to claim 1 , wherein the mixing step comprises:
a step of filling the forming die with the mixed powder containing the resin powder of the thermocompression-bondable resin, the abrasive grains and the fibrous filler;
a step of flattening a surface of the mixed powder; and
a step of dropwise adding the liquid dispersion medium onto the mixed powder.

Assignees

• Tokyo Seimitsu Co Ltd

Inventors

• Nakamura Masato

Classifications

• B24D3/06

  metallic {or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements} · CPC title

• B24D3/00

  Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents · CPC title

• B24D3/344

  the bonding agent being organic · CPC title

• B24D18/0009

  using moulds or presses · CPC title

• B24D3/32 Primary

  for porous or cellular structure · CPC title