| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of an acoustic coupling member without being affected by a film thickness of adhesive even though the acoustic coupling member is an aggregate of two members.SOLUTION: A manufacturing method of an acoustic coupling member includes the steps of: lapping a second mold having a convex portion having a height from a reference plane and a flatness surface portion being continued from the convex portion and extending in the reference plane over a first mold 71, forming a first cavity between a concave portion and the convex portion, forming a second cavity being continued from the first cavity and having a gap thickness greater than a gap thickness of the first cavity between the first mold 71 and the flatness surface portion, and filling the first cavity and the second cavity with a first resin material; and curing the first resin material, lapping a third mold 83 brought into contact with a thick wall portion 67 of an envelope 64 at a flat internal wall surface 85 over the first mold 71, forming a space 84 between a hollow 81 formed on the envelope 64 according to the convex portion and the internal wall surface 85, filling the space 84 with a second resin material, curing the second resin material, and molding the acoustic coupling member.SELECTED DRAWING: Figure 9 |
