PURPOSE: To obtain a resin product wherein a first and a second resin materials are firmly connected without generating flashes on a designed face.
CONSTITUTION: A partition protrusion 26 at an upper end of a slide core 24 is abutted against a damming protrusion 25 of a fixed mold 22 so as to form a first cavity 27. After a first resin material 12 is injected into the cavity 27 to fill it with the resin material 12, the slide core 24 is moved so as to form a second cavity 30 into which a second resin material 13 is injected to fill it with the resin material 13. The second resin material 13 which flows in the second cavity 30 is dammed by the damming protrusion 25, so that it does not abut against a part of the first resin material 12. Accordingly, even if there is a gap between the fixed mold 22 and the first resin material 12, the resin material 13 does not enter the gap. Heat at the cavities 27 and 30 of the slide core 24 does not escape easily due to a heat insulating hollow 32, so that the temperature at the part where the first and second resin materials 12 and 13 abut against each other rises.
KOMIYAMA TOMOAKI
NAKAO KOJI
NAGATA TAKUJI
