| 摘要 |
PURPOSE: To obtain a hollow composite internally threaded member of which the outer cross-sectional shape is other than a circular shape by forming a reinforcing fabric layer to the surface of an externally threaded cylindrical core so as to conform to the threads thereof to form a cylindrical braided triaxial fabric and embedding the reinforcing fabric layer in a matrix to detach the core. CONSTITUTION: For example, a braiding machine 104 is used to form a reinforcing fabric layer 106 on an externally threaded cylindrical core 100 from continuous tows comprising a fiber material 105. Next, pref., fiber tows 114 are wound around the core to fill the surface cavities thereof to superpose reinforcing fabric layers 106 on the core and a matrix material is impregnated. Subsequently, continuous tows 107 comprising a fiber material, for example, six tows are axially pulled at an equal interval to be wound around the core to form a triaxially braided fabric layer 109. These continuous tows 107 are set to a dimension larger than that of other fiber material 105 forming the triaxially braided fabric layer 109. Next, the matrix material is impregnated to be heated under vacuum/pressure and the core 100 is detached to obtain an internally threaded member having a hexagonal outer shape. |
