Abstract: A holder integrated type base board made of synthetic resin integrally molded with a plurality of holders for inserting LEDs on a front face side of a base board main body and a mold therefore. The mold includes a first mold for molding a back face side of the base board main body and a second mold opposed to the first mold for molding the front face side of the base body main body. In addition, the mold includes a holder molding cavity provided at the second mold which is constituted by an insert die capable of being inserted into and detached from the second mold main body. When it is necessary to correct a position of a portion of the holder in a trially fabricated base board, a position of an LED inserting hole in the base board can simply be corrected by drawing the insert die for molding the holder from the mold main body and interchanging the insert die with a new insert die. As such, an entire first mold does not have to be reproduced.

Abstract: To provide a method and an apparatus that can execute simultaneous injection molding of a plurality of different resin components using a mold construction that makes possible simultaneous main-sub component molding, without having to make the mold and device larger. A simultaneous main-sub component molding method utilizes a mold device having a first cavity C1 for molding a first resin component and a second cavity C2 for molding a second resin component. The mold cavities C1 and C2 are provided in a pair of opposed mold halves 100, 200 which close for the molding operation and open to remove the molded parts. In this mold device, injection molding of a plurality of different types of resin components 20, 23 is simultaneous. The first resin component is configured from a large resin component that is substantially circular, U-shaped, or L-shaped. The second resin component is configured from a small resin component that can be positioned inside an open portion of the first resin component.

Abstract: A holder integrated type base board made of synthetic resin integrally molded with a plurality of holders for inserting LEDs on a front face side of a base board main body and a mold therefore. The mold includes a first mold for molding a back face side of the base board main body and a second mold opposed to the first mold for molding the front face side of the base body main body. In addition, the mold includes a holder molding cavity provided at the second mold which is constituted by an insert die capable of being inserted into and detached from the second mold main body. When it is necessary to correct a position of a portion of the holder in a trially fabricated base board, a position of an LED inserting hole in the base board can simply be corrected by drawing the insert die for molding the holder from the mold main body and interchanging the insert die with a new insert die. As such, an entire first mold does not have to be reproduced.