Injection molding system for performing assembly operation in mold

An injection molding system, comprising:

• a mold in which a first molded article and a second molded article can be simultaneously molded;
• a first extruding member that extrudes the first molded article from a cavity of the mold;
• a molded-article transfer device that includes a retention mechanism for retaining the first molded article extruded from the cavity of the mold, and transfers the first molded article retained by way of the retention mechanism to an assembling position in relation to the second molded article in the mold;
• a second extruding member that extrudes the second molded article from the cavity of the mold against the first molded article retained at the assembling position in the mold by way of the retention mechanism of the molded-article transfer device, and assembles the second molded article to the first molded article;
• and
• a load detection unit that detects load applied to at least one of the second extruding member and the molded-article transfer device,
• wherein defect discrimination of a state of fitting the first molded article, the second molded article, or an assembled state of the first molded article and the second molded article is performed, based on load detected by way of the load detection unit when the second molded article is assembled to the first molded article, in the mold,
• wherein the first extruding member is formed longer than the second extruding member, allowing for the ejecting of the first molded article prior to ejecting the second molded article.