| 摘要 |
PROBLEM TO BE SOLVED: To provide an insert-molding method and an apparatus which do not require the secondary injection or the secondary pressing of a molten resin. SOLUTION: The insert-molding method includes four processes. In the first process, an insert object 2 is kept at a specified position in a cavity 5 by making holding pins 8a, 8b and 8c which are installed in the cavity 5 in a manner to be freely appeared or disappeared advance in the cavity 5 by using a die which forms the cavity 5 between a fixed die 3 and a movable die 4. In the second process, the molten resin is made to flow in the cavity 5 in a state that the insert object 2 is held by the holding pins 8a, 8b and 8c. In the third process, a positional relationship between the flow front of the molten resin and the holding pins 8a, 8b and 8c in the cavity 5 is sensed. In the fourth process, the holding pins 8a, 8b and 8c are made to retract form the inside of the cavity 5 when the flow front has been sensed at a position within a specified range to the holding pins 8a, 8b and 8c. The insert-molding apparatus includes the fixed die 3, the movable die 4, the holding pins 8, an appearance/disappearance control means 10, and a flow front position sensing means 11. COPYRIGHT: (C)2011,JPO&INPIT |
