Pillar garnish manufacturing method

A pillar garnish manufacturing method in which an elongated first member and a second member are integrally formed by performing injection molding of the second member with respect to at least a part of an outer surface of the first member,

• wherein an injection molding mold for injection molding of the second member includes:
• a fixed mold;
• a movable mold which is capable of performing opening/closing movement;
• and a sliding mold which is disposed on one of the fixed mold and the movable mold and capable of performing forward/backward movement in a direction intersecting with an opening/closing movement direction of the movable mold,
• wherein a protrusion protruding in a forward movement direction of the sliding mold is provided to the sliding mold,
• wherein the first member includes a head portion and a leg portion protruding from the head portion, and
• wherein an engaging portion capable of being engaged with the protrusion is provided to the leg portion,
• the method comprising:
• a setting step of setting the first member in the one of the fixed mold and the movable mold on which the sliding mold is disposed, when the injection molding mold is opened;
• a cavity forming step of forming a molding cavity for molding the second member by disposing the first member at a predetermined regular position by moving the sliding mold forward and inserting the protrusion into the engaging portion, and then closing the injection molding mold to cause at least a part of a mold surface of the sliding mold, other than a mold surface of the protrusion, to come into contact with the first member;
• and
• a second member molding step of molding the second member by injecting and filling a heated and molten elastic polymer material in the molding cavity, and joining the first member and the second member to be integrally formed.