| 摘要 |
PURPOSE:To obtain a novel molded article, use sensor use with which the productivity and the reliability of manufactured articles can be improved sharply by a method wherein three injection molding operations, namely, a primary molding to a tertiary molding, are conducted for two lead frames. CONSTITUTION:A molded article is manufactured by conducting three injection molding methods, namely, a primary molding method, a secondary molding method and a tertiary molding method, for two lead frames 1. In this case, in the primary molding operation, an injection molding operation is conducted by providing conical or cylindrical protrusions 3 on the outer circumference, and a lead wire 4 is connected to one side of the lead frame 1. Then, in the secondary molding operation, an injection molding operation is conducted on the outer circumference of the primary molded article 2, and a thermistor element 7 is connected to the lead frame 1 on the other side of the lead frame 1. Besides, in the tertiary molding method, the outer circumference of the secondary molded article 6 is injection-molded in such a manner that the entire thermistor element 7 is sealed by synthetic resin 8. For example, polyphenylene sulphide, polypropylene or polycarbonate is used as the synthetic resin for the above- mentioned injection molding, and copper, brass or phosphor-bronze is used for the lead frame. |
