Method for manufacturing interdental cleaning device

A method for manufacturing an interdental cleaning device including:

• a base portion that is formed by molding a synthetic resin material and includes a handle portion and a core portion provided at a front end of the handle portion and having a slender shaft shape;
• and
• a soft portion that is formed on the base portion by molding an elastomeric material, and includes a cleaning soft portion substantially covering at least part of the core portion, a non-slip portion substantially covering at least part of the handle portion, and connecting portions also covering at least part of the handle portion, extending from two sites of the non-slip portion, and being connected to the cleaning soft portion,
• the method comprising:
• forming, in the base portion, a concave portion so as to correspond to the non-slip portion, and a groove so as to correspond to each of the connecting portions;
• providing, in a mold, a plurality of molding spaces in parallel for molding soft portions including the soft portion;
• providing a gate of a mold, which opens to each of the plurality of molding spaces, to open at a mating surface of the mold, and open at a position substantially equally distant from positions of two communicating openings of a non-slip molding space for molding the non-slip portion, the two communicating openings communicating with connecting portion molding spaces for molding the connecting portions;
• and
• charging the elastomeric material from the gate into a soft portion molding space to fill the soft portion molding space.