Resin molding method

A resin molding method using a fixed mold, a movable mold movable in a first direction so as to switch between clamping of the fixed mold and the movable mold and removal of the movable mold from the fixed mold, and a die slide mold movable in a second direction different from the first direction inside the movable mold, the method comprising:

• a first molding step of molding a first molded part supported in the fixed mold and a second molded part supported in the die slide mold in different positions in the second direction by injecting resin into the molds while the fixed mold and the movable mold are clamped;
• a sliding step of aligning the first molded part and the second molded part in the second direction by removing the movable mold from the fixed mold after the first molding step and then moving the die slide mold in the second direction;
• a second molding step of molding a predetermined resin molded article by moving the movable mold in the first direction toward the fixed mold after the sliding step to engage the first molded part and the second molded part, and injecting resin into engaged portions while the fixed mold and the movable mold are clamped again to join the first molded part and the second molded part;
• and
• a mold opening step of removing the movable mold from the fixed mold after the second molding step,
• wherein each of the first molded part and the second molded part includes a bottom surface and a pair of opposing walls that extend from the bottom surface in the first direction and are opposed to each other,
• wherein, before the second molding step, the method further comprises a step of interposing a filter between the bottom surface of the first molded part and the bottom surface of the second molded part and
• wherein, in the second molding step:
• the pair of opposing walls of the first molded part and the pair of opposing walls of the second molded part are located alternately adjacent to each other to form a frame body;
• and
• the filter is fixed between the bottom surface of the first molded part and the bottom surface of the second molded part.