| 摘要 |
PURPOSE:To contrive an improvement in reliability on an insert part by facilitating boring operation, by processing an insertion hole of an insert material after a skin layer, which is an inner layer, and a core layer, which is a sintertic foam, have been unified. CONSTITUTION:After a skin layer 2, which is an inner layer, has been formed through a filament winding (FW) method, a core material molded beforehand is stuck 3 over the same, then an insertion hole 7 of an insert material 6 is provided in an obtained laminate and after insertion and adhesion of the insert material here, a form of the external circumference of the laminate is shaped through machining of the external circumference. Then the insert material 6 including a skin layer 4, which is an outer layer and has been molded through the FW method beforehand, is bored by performing pressing-in and adhesion of the skin layer 4, which is the outer layer, in the external circumference of the laminate. As for interference between the laminate and skin layer 4, to an extent of 0-0.3/diameter is favorable from workability point of view. As boring of a sintertic foam core is performed after unification with the skin layer 2, which is the inner layer, fragility of the core is not linked with inferiority in boring properties and manufacturing is facilitated.
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