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Title:
PRODUCTION METHOD OF ORAL CARE BRUSH AND ORAL CARE BRUSH
Document Type and Number:
Japanese Patent JP2020062219
Kind Code:
A
Abstract:
To provide a safe oral care brush which has less exposure of a metal core material, has preferable use feeling and high dropping resistant intensity of a brush to a handle part, and a production method thereof.SOLUTION: A production method of the invention comprises: a first step for inserting and fixing a first part 114 of a core material 110 into a metal mold 200, and arranging a second part 115 of the core material 110 so as to protrude from a metal mold 200; a second step for injecting a molten resin material into the metal mold 200 and integrally forming a handle part and a covered part covered with the handle part, thereby forming a substrate; and a third step for sandwiching a hair material between second parts 115 of a plurality of metal wire materials of the substrate, and twisting the second parts thereby forming a twisted part which holds the hair material.SELECTED DRAWING: Figure 2

Inventors:
HASHIMOTO HIDEAKI
Application Number:
JP2018196052A
Publication Date:
April 23, 2020
Filing Date:
October 17, 2018
Export Citation:
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Assignee:
HASHIMOTO BRUSH SEISAKUSHO:KK
International Classes:
A46D3/05; A46B3/18; A61C15/02; A61C17/00
Domestic Patent References:
JP2000229015A2000-08-22
JP2009089849A2009-04-30
JP2016202743A2016-12-08
JP2018068514A2018-05-10
Foreign References:
WO2012063496A12012-05-18
Attorney, Agent or Firm:
Tadashi Otsuka